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3904 lines
107 KiB
3904 lines
107 KiB
/*-
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* Copyright (c) 2003-2010 Tim Kientzle
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* Copyright (c) 2012 Michihiro NAKAJIMA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD$");
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#if !defined(_WIN32) || defined(__CYGWIN__)
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_ACL_H
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#include <sys/acl.h>
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#endif
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#ifdef HAVE_SYS_EXTATTR_H
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#include <sys/extattr.h>
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#endif
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#if defined(HAVE_SYS_XATTR_H)
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#include <sys/xattr.h>
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#elif defined(HAVE_ATTR_XATTR_H)
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#include <attr/xattr.h>
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#endif
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#ifdef HAVE_SYS_EA_H
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#include <sys/ea.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_UTIME_H
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#include <sys/utime.h>
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#endif
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#ifdef HAVE_COPYFILE_H
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#include <copyfile.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_GRP_H
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#include <grp.h>
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#endif
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#ifdef HAVE_LANGINFO_H
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#include <langinfo.h>
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#endif
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#ifdef HAVE_LINUX_FS_H
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#include <linux/fs.h> /* for Linux file flags */
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#endif
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/*
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* Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
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* As the include guards don't agree, the order of include is important.
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*/
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#ifdef HAVE_LINUX_EXT2_FS_H
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#include <linux/ext2_fs.h> /* for Linux file flags */
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#endif
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#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
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#include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
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#endif
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_UTIME_H
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#include <utime.h>
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#endif
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#ifdef F_GETTIMES /* Tru64 specific */
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#include <sys/fcntl1.h>
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#endif
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#if __APPLE__
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#include <TargetConditionals.h>
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#if TARGET_OS_MAC && !TARGET_OS_EMBEDDED && HAVE_QUARANTINE_H
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#include <quarantine.h>
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#define HAVE_QUARANTINE 1
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#endif
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#endif
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#ifdef HAVE_ZLIB_H
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#include <cm_zlib.h>
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#endif
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/* TODO: Support Mac OS 'quarantine' feature. This is really just a
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* standard tag to mark files that have been downloaded as "tainted".
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* On Mac OS, we should mark the extracted files as tainted if the
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* archive being read was tainted. Windows has a similar feature; we
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* should investigate ways to support this generically. */
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#include "archive.h"
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#include "archive_acl_private.h"
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#include "archive_string.h"
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#include "archive_endian.h"
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#include "archive_entry.h"
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#include "archive_private.h"
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#include "archive_write_disk_private.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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struct fixup_entry {
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struct fixup_entry *next;
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struct archive_acl acl;
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mode_t mode;
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int64_t atime;
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int64_t birthtime;
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int64_t mtime;
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int64_t ctime;
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unsigned long atime_nanos;
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unsigned long birthtime_nanos;
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unsigned long mtime_nanos;
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unsigned long ctime_nanos;
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unsigned long fflags_set;
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size_t mac_metadata_size;
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void *mac_metadata;
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int fixup; /* bitmask of what needs fixing */
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char *name;
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};
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/*
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* We use a bitmask to track which operations remain to be done for
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* this file. In particular, this helps us avoid unnecessary
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* operations when it's possible to take care of one step as a
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* side-effect of another. For example, mkdir() can specify the mode
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* for the newly-created object but symlink() cannot. This means we
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* can skip chmod() if mkdir() succeeded, but we must explicitly
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* chmod() if we're trying to create a directory that already exists
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* (mkdir() failed) or if we're restoring a symlink. Similarly, we
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* need to verify UID/GID before trying to restore SUID/SGID bits;
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* that verification can occur explicitly through a stat() call or
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* implicitly because of a successful chown() call.
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*/
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#define TODO_MODE_FORCE 0x40000000
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#define TODO_MODE_BASE 0x20000000
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#define TODO_SUID 0x10000000
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#define TODO_SUID_CHECK 0x08000000
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#define TODO_SGID 0x04000000
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#define TODO_SGID_CHECK 0x02000000
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#define TODO_APPLEDOUBLE 0x01000000
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#define TODO_MODE (TODO_MODE_BASE|TODO_SUID|TODO_SGID)
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#define TODO_TIMES ARCHIVE_EXTRACT_TIME
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#define TODO_OWNER ARCHIVE_EXTRACT_OWNER
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#define TODO_FFLAGS ARCHIVE_EXTRACT_FFLAGS
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#define TODO_ACLS ARCHIVE_EXTRACT_ACL
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#define TODO_XATTR ARCHIVE_EXTRACT_XATTR
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#define TODO_MAC_METADATA ARCHIVE_EXTRACT_MAC_METADATA
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#define TODO_HFS_COMPRESSION ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED
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struct archive_write_disk {
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struct archive archive;
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mode_t user_umask;
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struct fixup_entry *fixup_list;
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struct fixup_entry *current_fixup;
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int64_t user_uid;
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int skip_file_set;
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int64_t skip_file_dev;
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int64_t skip_file_ino;
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time_t start_time;
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int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid);
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void (*cleanup_gid)(void *private);
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void *lookup_gid_data;
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int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid);
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void (*cleanup_uid)(void *private);
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void *lookup_uid_data;
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/*
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* Full path of last file to satisfy symlink checks.
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*/
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struct archive_string path_safe;
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/*
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* Cached stat data from disk for the current entry.
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* If this is valid, pst points to st. Otherwise,
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* pst is null.
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*/
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struct stat st;
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struct stat *pst;
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/* Information about the object being restored right now. */
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struct archive_entry *entry; /* Entry being extracted. */
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char *name; /* Name of entry, possibly edited. */
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struct archive_string _name_data; /* backing store for 'name' */
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/* Tasks remaining for this object. */
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int todo;
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/* Tasks deferred until end-of-archive. */
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int deferred;
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/* Options requested by the client. */
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int flags;
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/* Handle for the file we're restoring. */
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int fd;
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/* Current offset for writing data to the file. */
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int64_t offset;
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/* Last offset actually written to disk. */
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int64_t fd_offset;
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/* Total bytes actually written to files. */
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int64_t total_bytes_written;
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/* Maximum size of file, -1 if unknown. */
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int64_t filesize;
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/* Dir we were in before this restore; only for deep paths. */
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int restore_pwd;
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/* Mode we should use for this entry; affected by _PERM and umask. */
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mode_t mode;
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/* UID/GID to use in restoring this entry. */
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int64_t uid;
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int64_t gid;
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/*
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* HFS+ Compression.
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*/
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/* Xattr "com.apple.decmpfs". */
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uint32_t decmpfs_attr_size;
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unsigned char *decmpfs_header_p;
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/* ResourceFork set options used for fsetxattr. */
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int rsrc_xattr_options;
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/* Xattr "com.apple.ResourceFork". */
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unsigned char *resource_fork;
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size_t resource_fork_allocated_size;
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unsigned int decmpfs_block_count;
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uint32_t *decmpfs_block_info;
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/* Buffer for compressed data. */
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unsigned char *compressed_buffer;
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size_t compressed_buffer_size;
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size_t compressed_buffer_remaining;
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/* The offset of the ResourceFork where compressed data will
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* be placed. */
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uint32_t compressed_rsrc_position;
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uint32_t compressed_rsrc_position_v;
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/* Buffer for uncompressed data. */
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char *uncompressed_buffer;
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size_t block_remaining_bytes;
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size_t file_remaining_bytes;
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#ifdef HAVE_ZLIB_H
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z_stream stream;
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int stream_valid;
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int decmpfs_compression_level;
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#endif
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};
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/*
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* Default mode for dirs created automatically (will be modified by umask).
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* Note that POSIX specifies 0777 for implicitly-created dirs, "modified
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* by the process' file creation mask."
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*/
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#define DEFAULT_DIR_MODE 0777
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/*
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* Dir modes are restored in two steps: During the extraction, the permissions
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* in the archive are modified to match the following limits. During
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* the post-extract fixup pass, the permissions from the archive are
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* applied.
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*/
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#define MINIMUM_DIR_MODE 0700
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#define MAXIMUM_DIR_MODE 0775
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/*
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* Maxinum uncompressed size of a decmpfs block.
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*/
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#define MAX_DECMPFS_BLOCK_SIZE (64 * 1024)
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/*
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* HFS+ compression type.
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*/
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#define CMP_XATTR 3/* Compressed data in xattr. */
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#define CMP_RESOURCE_FORK 4/* Compressed data in resource fork. */
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/*
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* HFS+ compression resource fork.
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*/
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#define RSRC_H_SIZE 260 /* Base size of Resource fork header. */
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#define RSRC_F_SIZE 50 /* Size of Resource fork footer. */
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/* Size to write compressed data to resource fork. */
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#define COMPRESSED_W_SIZE (64 * 1024)
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/* decmpfs difinitions. */
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#define MAX_DECMPFS_XATTR_SIZE 3802
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#ifndef DECMPFS_XATTR_NAME
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#define DECMPFS_XATTR_NAME "com.apple.decmpfs"
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#endif
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#define DECMPFS_MAGIC 0x636d7066
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#define DECMPFS_COMPRESSION_MAGIC 0
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#define DECMPFS_COMPRESSION_TYPE 4
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#define DECMPFS_UNCOMPRESSED_SIZE 8
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#define DECMPFS_HEADER_SIZE 16
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#define HFS_BLOCKS(s) ((s) >> 12)
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static int check_symlinks(struct archive_write_disk *);
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static int create_filesystem_object(struct archive_write_disk *);
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static struct fixup_entry *current_fixup(struct archive_write_disk *, const char *pathname);
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#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
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static void edit_deep_directories(struct archive_write_disk *ad);
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#endif
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static int cleanup_pathname(struct archive_write_disk *);
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static int create_dir(struct archive_write_disk *, char *);
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static int create_parent_dir(struct archive_write_disk *, char *);
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static ssize_t hfs_write_data_block(struct archive_write_disk *,
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const char *, size_t);
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static int fixup_appledouble(struct archive_write_disk *, const char *);
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static int older(struct stat *, struct archive_entry *);
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static int restore_entry(struct archive_write_disk *);
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static int set_mac_metadata(struct archive_write_disk *, const char *,
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const void *, size_t);
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static int set_xattrs(struct archive_write_disk *);
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static int clear_nochange_fflags(struct archive_write_disk *);
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static int set_fflags(struct archive_write_disk *);
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static int set_fflags_platform(struct archive_write_disk *, int fd,
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const char *name, mode_t mode,
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unsigned long fflags_set, unsigned long fflags_clear);
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static int set_ownership(struct archive_write_disk *);
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static int set_mode(struct archive_write_disk *, int mode);
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static int set_time(int, int, const char *, time_t, long, time_t, long);
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static int set_times(struct archive_write_disk *, int, int, const char *,
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time_t, long, time_t, long, time_t, long, time_t, long);
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static int set_times_from_entry(struct archive_write_disk *);
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static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
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static ssize_t write_data_block(struct archive_write_disk *,
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const char *, size_t);
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static struct archive_vtable *archive_write_disk_vtable(void);
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static int _archive_write_disk_close(struct archive *);
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static int _archive_write_disk_free(struct archive *);
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static int _archive_write_disk_header(struct archive *, struct archive_entry *);
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static int64_t _archive_write_disk_filter_bytes(struct archive *, int);
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static int _archive_write_disk_finish_entry(struct archive *);
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static ssize_t _archive_write_disk_data(struct archive *, const void *, size_t);
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static ssize_t _archive_write_disk_data_block(struct archive *, const void *, size_t, int64_t);
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static int
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lazy_stat(struct archive_write_disk *a)
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{
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if (a->pst != NULL) {
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/* Already have stat() data available. */
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return (ARCHIVE_OK);
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}
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#ifdef HAVE_FSTAT
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if (a->fd >= 0 && fstat(a->fd, &a->st) == 0) {
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a->pst = &a->st;
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return (ARCHIVE_OK);
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}
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#endif
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/*
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* XXX At this point, symlinks should not be hit, otherwise
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* XXX a race occurred. Do we want to check explicitly for that?
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*/
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if (lstat(a->name, &a->st) == 0) {
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a->pst = &a->st;
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return (ARCHIVE_OK);
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}
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archive_set_error(&a->archive, errno, "Couldn't stat file");
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return (ARCHIVE_WARN);
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}
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static struct archive_vtable *
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archive_write_disk_vtable(void)
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{
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static struct archive_vtable av;
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static int inited = 0;
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if (!inited) {
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av.archive_close = _archive_write_disk_close;
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av.archive_filter_bytes = _archive_write_disk_filter_bytes;
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av.archive_free = _archive_write_disk_free;
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av.archive_write_header = _archive_write_disk_header;
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av.archive_write_finish_entry
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= _archive_write_disk_finish_entry;
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av.archive_write_data = _archive_write_disk_data;
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av.archive_write_data_block = _archive_write_disk_data_block;
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inited = 1;
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}
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return (&av);
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}
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static int64_t
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_archive_write_disk_filter_bytes(struct archive *_a, int n)
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{
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struct archive_write_disk *a = (struct archive_write_disk *)_a;
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(void)n; /* UNUSED */
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if (n == -1 || n == 0)
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return (a->total_bytes_written);
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return (-1);
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}
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int
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archive_write_disk_set_options(struct archive *_a, int flags)
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{
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struct archive_write_disk *a = (struct archive_write_disk *)_a;
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a->flags = flags;
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return (ARCHIVE_OK);
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}
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|
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/*
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* Extract this entry to disk.
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*
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* TODO: Validate hardlinks. According to the standards, we're
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* supposed to check each extracted hardlink and squawk if it refers
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* to a file that we didn't restore. I'm not entirely convinced this
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* is a good idea, but more importantly: Is there any way to validate
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* hardlinks without keeping a complete list of filenames from the
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* entire archive?? Ugh.
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*
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*/
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static int
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_archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
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{
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struct archive_write_disk *a = (struct archive_write_disk *)_a;
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struct fixup_entry *fe;
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int ret, r;
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archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
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ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
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"archive_write_disk_header");
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archive_clear_error(&a->archive);
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if (a->archive.state & ARCHIVE_STATE_DATA) {
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r = _archive_write_disk_finish_entry(&a->archive);
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if (r == ARCHIVE_FATAL)
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return (r);
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}
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|
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/* Set up for this particular entry. */
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a->pst = NULL;
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a->current_fixup = NULL;
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a->deferred = 0;
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if (a->entry) {
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archive_entry_free(a->entry);
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a->entry = NULL;
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}
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a->entry = archive_entry_clone(entry);
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a->fd = -1;
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a->fd_offset = 0;
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a->offset = 0;
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a->restore_pwd = -1;
|
|
a->uid = a->user_uid;
|
|
a->mode = archive_entry_mode(a->entry);
|
|
if (archive_entry_size_is_set(a->entry))
|
|
a->filesize = archive_entry_size(a->entry);
|
|
else
|
|
a->filesize = -1;
|
|
archive_strcpy(&(a->_name_data), archive_entry_pathname(a->entry));
|
|
a->name = a->_name_data.s;
|
|
archive_clear_error(&a->archive);
|
|
|
|
/*
|
|
* Clean up the requested path. This is necessary for correct
|
|
* dir restores; the dir restore logic otherwise gets messed
|
|
* up by nonsense like "dir/.".
|
|
*/
|
|
ret = cleanup_pathname(a);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
|
|
/*
|
|
* Query the umask so we get predictable mode settings.
|
|
* This gets done on every call to _write_header in case the
|
|
* user edits their umask during the extraction for some
|
|
* reason.
|
|
*/
|
|
umask(a->user_umask = umask(0));
|
|
|
|
/* Figure out what we need to do for this entry. */
|
|
a->todo = TODO_MODE_BASE;
|
|
if (a->flags & ARCHIVE_EXTRACT_PERM) {
|
|
a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
|
|
/*
|
|
* SGID requires an extra "check" step because we
|
|
* cannot easily predict the GID that the system will
|
|
* assign. (Different systems assign GIDs to files
|
|
* based on a variety of criteria, including process
|
|
* credentials and the gid of the enclosing
|
|
* directory.) We can only restore the SGID bit if
|
|
* the file has the right GID, and we only know the
|
|
* GID if we either set it (see set_ownership) or if
|
|
* we've actually called stat() on the file after it
|
|
* was restored. Since there are several places at
|
|
* which we might verify the GID, we need a TODO bit
|
|
* to keep track.
|
|
*/
|
|
if (a->mode & S_ISGID)
|
|
a->todo |= TODO_SGID | TODO_SGID_CHECK;
|
|
/*
|
|
* Verifying the SUID is simpler, but can still be
|
|
* done in multiple ways, hence the separate "check" bit.
|
|
*/
|
|
if (a->mode & S_ISUID)
|
|
a->todo |= TODO_SUID | TODO_SUID_CHECK;
|
|
} else {
|
|
/*
|
|
* User didn't request full permissions, so don't
|
|
* restore SUID, SGID bits and obey umask.
|
|
*/
|
|
a->mode &= ~S_ISUID;
|
|
a->mode &= ~S_ISGID;
|
|
a->mode &= ~S_ISVTX;
|
|
a->mode &= ~a->user_umask;
|
|
}
|
|
if (a->flags & ARCHIVE_EXTRACT_OWNER)
|
|
a->todo |= TODO_OWNER;
|
|
if (a->flags & ARCHIVE_EXTRACT_TIME)
|
|
a->todo |= TODO_TIMES;
|
|
if (a->flags & ARCHIVE_EXTRACT_ACL) {
|
|
if (archive_entry_filetype(a->entry) == AE_IFDIR)
|
|
a->deferred |= TODO_ACLS;
|
|
else
|
|
a->todo |= TODO_ACLS;
|
|
}
|
|
if (a->flags & ARCHIVE_EXTRACT_MAC_METADATA) {
|
|
if (archive_entry_filetype(a->entry) == AE_IFDIR)
|
|
a->deferred |= TODO_MAC_METADATA;
|
|
else
|
|
a->todo |= TODO_MAC_METADATA;
|
|
}
|
|
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
|
|
if ((a->flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) == 0) {
|
|
unsigned long set, clear;
|
|
archive_entry_fflags(a->entry, &set, &clear);
|
|
if ((set & ~clear) & UF_COMPRESSED) {
|
|
a->todo |= TODO_HFS_COMPRESSION;
|
|
a->decmpfs_block_count = (unsigned)-1;
|
|
}
|
|
}
|
|
if ((a->flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) != 0 &&
|
|
(a->mode & AE_IFMT) == AE_IFREG && a->filesize > 0) {
|
|
a->todo |= TODO_HFS_COMPRESSION;
|
|
a->decmpfs_block_count = (unsigned)-1;
|
|
}
|
|
{
|
|
const char *p;
|
|
|
|
/* Check if the current file name is a type of the
|
|
* resource fork file. */
|
|
p = strrchr(a->name, '/');
|
|
if (p == NULL)
|
|
p = a->name;
|
|
else
|
|
p++;
|
|
if (p[0] == '.' && p[1] == '_') {
|
|
/* Do not compress "._XXX" files. */
|
|
a->todo &= ~TODO_HFS_COMPRESSION;
|
|
if (a->filesize > 0)
|
|
a->todo |= TODO_APPLEDOUBLE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (a->flags & ARCHIVE_EXTRACT_XATTR)
|
|
a->todo |= TODO_XATTR;
|
|
if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
|
|
a->todo |= TODO_FFLAGS;
|
|
if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
|
|
ret = check_symlinks(a);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
}
|
|
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
|
|
/* If path exceeds PATH_MAX, shorten the path. */
|
|
edit_deep_directories(a);
|
|
#endif
|
|
|
|
ret = restore_entry(a);
|
|
|
|
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
|
|
/*
|
|
* Check if the filesystem the file is restoring on supports
|
|
* HFS+ Compression. If not, cancel HFS+ Compression.
|
|
*/
|
|
if (a->todo | TODO_HFS_COMPRESSION) {
|
|
/*
|
|
* NOTE: UF_COMPRESSED is ignored even if the filesystem
|
|
* supports HFS+ Compression because the file should
|
|
* have at least an extended attriute "com.apple.decmpfs"
|
|
* before the flag is set to indicate that the file have
|
|
* been compressed. If hte filesystem does not support
|
|
* HFS+ Compression the system call will fail.
|
|
*/
|
|
if (a->fd < 0 || fchflags(a->fd, UF_COMPRESSED) != 0)
|
|
a->todo &= ~TODO_HFS_COMPRESSION;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* TODO: There are rumours that some extended attributes must
|
|
* be restored before file data is written. If this is true,
|
|
* then we either need to write all extended attributes both
|
|
* before and after restoring the data, or find some rule for
|
|
* determining which must go first and which last. Due to the
|
|
* many ways people are using xattrs, this may prove to be an
|
|
* intractable problem.
|
|
*/
|
|
|
|
#ifdef HAVE_FCHDIR
|
|
/* If we changed directory above, restore it here. */
|
|
if (a->restore_pwd >= 0) {
|
|
r = fchdir(a->restore_pwd);
|
|
if (r != 0) {
|
|
archive_set_error(&a->archive, errno, "chdir() failure");
|
|
ret = ARCHIVE_FATAL;
|
|
}
|
|
close(a->restore_pwd);
|
|
a->restore_pwd = -1;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Fixup uses the unedited pathname from archive_entry_pathname(),
|
|
* because it is relative to the base dir and the edited path
|
|
* might be relative to some intermediate dir as a result of the
|
|
* deep restore logic.
|
|
*/
|
|
if (a->deferred & TODO_MODE) {
|
|
fe = current_fixup(a, archive_entry_pathname(entry));
|
|
if (fe == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
fe->fixup |= TODO_MODE_BASE;
|
|
fe->mode = a->mode;
|
|
}
|
|
|
|
if ((a->deferred & TODO_TIMES)
|
|
&& (archive_entry_mtime_is_set(entry)
|
|
|| archive_entry_atime_is_set(entry))) {
|
|
fe = current_fixup(a, archive_entry_pathname(entry));
|
|
if (fe == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
fe->mode = a->mode;
|
|
fe->fixup |= TODO_TIMES;
|
|
if (archive_entry_atime_is_set(entry)) {
|
|
fe->atime = archive_entry_atime(entry);
|
|
fe->atime_nanos = archive_entry_atime_nsec(entry);
|
|
} else {
|
|
/* If atime is unset, use start time. */
|
|
fe->atime = a->start_time;
|
|
fe->atime_nanos = 0;
|
|
}
|
|
if (archive_entry_mtime_is_set(entry)) {
|
|
fe->mtime = archive_entry_mtime(entry);
|
|
fe->mtime_nanos = archive_entry_mtime_nsec(entry);
|
|
} else {
|
|
/* If mtime is unset, use start time. */
|
|
fe->mtime = a->start_time;
|
|
fe->mtime_nanos = 0;
|
|
}
|
|
if (archive_entry_birthtime_is_set(entry)) {
|
|
fe->birthtime = archive_entry_birthtime(entry);
|
|
fe->birthtime_nanos = archive_entry_birthtime_nsec(entry);
|
|
} else {
|
|
/* If birthtime is unset, use mtime. */
|
|
fe->birthtime = fe->mtime;
|
|
fe->birthtime_nanos = fe->mtime_nanos;
|
|
}
|
|
}
|
|
|
|
if (a->deferred & TODO_ACLS) {
|
|
fe = current_fixup(a, archive_entry_pathname(entry));
|
|
if (fe == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
fe->fixup |= TODO_ACLS;
|
|
archive_acl_copy(&fe->acl, archive_entry_acl(entry));
|
|
}
|
|
|
|
if (a->deferred & TODO_MAC_METADATA) {
|
|
const void *metadata;
|
|
size_t metadata_size;
|
|
metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
|
|
if (metadata != NULL && metadata_size > 0) {
|
|
fe = current_fixup(a, archive_entry_pathname(entry));
|
|
if (fe == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
fe->mac_metadata = malloc(metadata_size);
|
|
if (fe->mac_metadata != NULL) {
|
|
memcpy(fe->mac_metadata, metadata, metadata_size);
|
|
fe->mac_metadata_size = metadata_size;
|
|
fe->fixup |= TODO_MAC_METADATA;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (a->deferred & TODO_FFLAGS) {
|
|
fe = current_fixup(a, archive_entry_pathname(entry));
|
|
if (fe == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
fe->fixup |= TODO_FFLAGS;
|
|
/* TODO: Complete this.. defer fflags from below. */
|
|
}
|
|
|
|
/* We've created the object and are ready to pour data into it. */
|
|
if (ret >= ARCHIVE_WARN)
|
|
a->archive.state = ARCHIVE_STATE_DATA;
|
|
/*
|
|
* If it's not open, tell our client not to try writing.
|
|
* In particular, dirs, links, etc, don't get written to.
|
|
*/
|
|
if (a->fd < 0) {
|
|
archive_entry_set_size(entry, 0);
|
|
a->filesize = 0;
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
archive_write_disk_set_skip_file(struct archive *_a, int64_t d, int64_t i)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
|
|
a->skip_file_set = 1;
|
|
a->skip_file_dev = d;
|
|
a->skip_file_ino = i;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static ssize_t
|
|
write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
|
|
{
|
|
uint64_t start_size = size;
|
|
ssize_t bytes_written = 0;
|
|
ssize_t block_size = 0, bytes_to_write;
|
|
|
|
if (size == 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
if (a->filesize == 0 || a->fd < 0) {
|
|
archive_set_error(&a->archive, 0,
|
|
"Attempt to write to an empty file");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
|
|
#if HAVE_STRUCT_STAT_ST_BLKSIZE
|
|
int r;
|
|
if ((r = lazy_stat(a)) != ARCHIVE_OK)
|
|
return (r);
|
|
block_size = a->pst->st_blksize;
|
|
#else
|
|
/* XXX TODO XXX Is there a more appropriate choice here ? */
|
|
/* This needn't match the filesystem allocation size. */
|
|
block_size = 16*1024;
|
|
#endif
|
|
}
|
|
|
|
/* If this write would run beyond the file size, truncate it. */
|
|
if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
|
|
start_size = size = (size_t)(a->filesize - a->offset);
|
|
|
|
/* Write the data. */
|
|
while (size > 0) {
|
|
if (block_size == 0) {
|
|
bytes_to_write = size;
|
|
} else {
|
|
/* We're sparsifying the file. */
|
|
const char *p, *end;
|
|
int64_t block_end;
|
|
|
|
/* Skip leading zero bytes. */
|
|
for (p = buff, end = buff + size; p < end; ++p) {
|
|
if (*p != '\0')
|
|
break;
|
|
}
|
|
a->offset += p - buff;
|
|
size -= p - buff;
|
|
buff = p;
|
|
if (size == 0)
|
|
break;
|
|
|
|
/* Calculate next block boundary after offset. */
|
|
block_end
|
|
= (a->offset / block_size + 1) * block_size;
|
|
|
|
/* If the adjusted write would cross block boundary,
|
|
* truncate it to the block boundary. */
|
|
bytes_to_write = size;
|
|
if (a->offset + bytes_to_write > block_end)
|
|
bytes_to_write = block_end - a->offset;
|
|
}
|
|
/* Seek if necessary to the specified offset. */
|
|
if (a->offset != a->fd_offset) {
|
|
if (lseek(a->fd, a->offset, SEEK_SET) < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Seek failed");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
a->fd_offset = a->offset;
|
|
}
|
|
bytes_written = write(a->fd, buff, bytes_to_write);
|
|
if (bytes_written < 0) {
|
|
archive_set_error(&a->archive, errno, "Write failed");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
buff += bytes_written;
|
|
size -= bytes_written;
|
|
a->total_bytes_written += bytes_written;
|
|
a->offset += bytes_written;
|
|
a->fd_offset = a->offset;
|
|
}
|
|
return (start_size - size);
|
|
}
|
|
|
|
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_SYS_XATTR_H)\
|
|
&& defined(HAVE_ZLIB_H)
|
|
|
|
/*
|
|
* Set UF_COMPRESSED file flag.
|
|
* This have to be called after hfs_write_decmpfs() because if the
|
|
* file does not have "com.apple.decmpfs" xattr the flag is ignored.
|
|
*/
|
|
static int
|
|
hfs_set_compressed_fflag(struct archive_write_disk *a)
|
|
{
|
|
int r;
|
|
|
|
if ((r = lazy_stat(a)) != ARCHIVE_OK)
|
|
return (r);
|
|
|
|
a->st.st_flags |= UF_COMPRESSED;
|
|
if (fchflags(a->fd, a->st.st_flags) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to set UF_COMPRESSED file flag");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* HFS+ Compression decmpfs
|
|
*
|
|
* +------------------------------+ +0
|
|
* | Magic(LE 4 bytes) |
|
|
* +------------------------------+
|
|
* | Type(LE 4 bytes) |
|
|
* +------------------------------+
|
|
* | Uncompressed size(LE 8 bytes)|
|
|
* +------------------------------+ +16
|
|
* | |
|
|
* | Compressed data |
|
|
* | (Placed only if Type == 3) |
|
|
* | |
|
|
* +------------------------------+ +3802 = MAX_DECMPFS_XATTR_SIZE
|
|
*
|
|
* Type is 3: decmpfs has compressed data.
|
|
* Type is 4: Resource Fork has compressed data.
|
|
*/
|
|
/*
|
|
* Write "com.apple.decmpfs"
|
|
*/
|
|
static int
|
|
hfs_write_decmpfs(struct archive_write_disk *a)
|
|
{
|
|
int r;
|
|
uint32_t compression_type;
|
|
|
|
r = fsetxattr(a->fd, DECMPFS_XATTR_NAME, a->decmpfs_header_p,
|
|
a->decmpfs_attr_size, 0, 0);
|
|
if (r < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Cannot restore xattr:%s", DECMPFS_XATTR_NAME);
|
|
compression_type = archive_le32dec(
|
|
&a->decmpfs_header_p[DECMPFS_COMPRESSION_TYPE]);
|
|
if (compression_type == CMP_RESOURCE_FORK)
|
|
fremovexattr(a->fd, XATTR_RESOURCEFORK_NAME,
|
|
XATTR_SHOWCOMPRESSION);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* HFS+ Compression Resource Fork
|
|
*
|
|
* +-----------------------------+
|
|
* | Header(260 bytes) |
|
|
* +-----------------------------+
|
|
* | Block count(LE 4 bytes) |
|
|
* +-----------------------------+ --+
|
|
* +-- | Offset (LE 4 bytes) | |
|
|
* | | [distance from Block count] | | Block 0
|
|
* | +-----------------------------+ |
|
|
* | | Compressed size(LE 4 bytes) | |
|
|
* | +-----------------------------+ --+
|
|
* | | |
|
|
* | | .................. |
|
|
* | | |
|
|
* | +-----------------------------+ --+
|
|
* | | Offset (LE 4 bytes) | |
|
|
* | +-----------------------------+ | Block (Block count -1)
|
|
* | | Compressed size(LE 4 bytes) | |
|
|
* +-> +-----------------------------+ --+
|
|
* | Compressed data(n bytes) | Block 0
|
|
* +-----------------------------+
|
|
* | |
|
|
* | .................. |
|
|
* | |
|
|
* +-----------------------------+
|
|
* | Compressed data(n bytes) | Block (Block count -1)
|
|
* +-----------------------------+
|
|
* | Footer(50 bytes) |
|
|
* +-----------------------------+
|
|
*
|
|
*/
|
|
/*
|
|
* Write the header of "com.apple.ResourceFork"
|
|
*/
|
|
static int
|
|
hfs_write_resource_fork(struct archive_write_disk *a, unsigned char *buff,
|
|
size_t bytes, uint32_t position)
|
|
{
|
|
int ret;
|
|
|
|
ret = fsetxattr(a->fd, XATTR_RESOURCEFORK_NAME, buff, bytes,
|
|
position, a->rsrc_xattr_options);
|
|
if (ret < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Cannot restore xattr: %s at %u pos %u bytes",
|
|
XATTR_RESOURCEFORK_NAME,
|
|
(unsigned)position,
|
|
(unsigned)bytes);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
a->rsrc_xattr_options &= ~XATTR_CREATE;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
hfs_write_compressed_data(struct archive_write_disk *a, size_t bytes_compressed)
|
|
{
|
|
int ret;
|
|
|
|
ret = hfs_write_resource_fork(a, a->compressed_buffer,
|
|
bytes_compressed, a->compressed_rsrc_position);
|
|
if (ret == ARCHIVE_OK)
|
|
a->compressed_rsrc_position += bytes_compressed;
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
hfs_write_resource_fork_header(struct archive_write_disk *a)
|
|
{
|
|
unsigned char *buff;
|
|
uint32_t rsrc_bytes;
|
|
uint32_t rsrc_header_bytes;
|
|
|
|
/*
|
|
* Write resource fork header + block info.
|
|
*/
|
|
buff = a->resource_fork;
|
|
rsrc_bytes = a->compressed_rsrc_position - RSRC_F_SIZE;
|
|
rsrc_header_bytes =
|
|
RSRC_H_SIZE + /* Header base size. */
|
|
4 + /* Block count. */
|
|
(a->decmpfs_block_count * 8);/* Block info */
|
|
archive_be32enc(buff, 0x100);
|
|
archive_be32enc(buff + 4, rsrc_bytes);
|
|
archive_be32enc(buff + 8, rsrc_bytes - 256);
|
|
archive_be32enc(buff + 12, 0x32);
|
|
memset(buff + 16, 0, 240);
|
|
archive_be32enc(buff + 256, rsrc_bytes - 260);
|
|
return hfs_write_resource_fork(a, buff, rsrc_header_bytes, 0);
|
|
}
|
|
|
|
static size_t
|
|
hfs_set_resource_fork_footer(unsigned char *buff, size_t buff_size)
|
|
{
|
|
static const char rsrc_footer[RSRC_F_SIZE] = {
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x1c, 0x00, 0x32, 0x00, 0x00, 'c', 'm',
|
|
'p', 'f', 0x00, 0x00, 0x00, 0x0a, 0x00, 0x01,
|
|
0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00
|
|
};
|
|
if (buff_size < sizeof(rsrc_footer))
|
|
return (0);
|
|
memcpy(buff, rsrc_footer, sizeof(rsrc_footer));
|
|
return (sizeof(rsrc_footer));
|
|
}
|
|
|
|
static int
|
|
hfs_reset_compressor(struct archive_write_disk *a)
|
|
{
|
|
int ret;
|
|
|
|
if (a->stream_valid)
|
|
ret = deflateReset(&a->stream);
|
|
else
|
|
ret = deflateInit(&a->stream, a->decmpfs_compression_level);
|
|
|
|
if (ret != Z_OK) {
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
|
|
"Failed to initialize compressor");
|
|
return (ARCHIVE_FATAL);
|
|
} else
|
|
a->stream_valid = 1;
|
|
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
hfs_decompress(struct archive_write_disk *a)
|
|
{
|
|
uint32_t *block_info;
|
|
unsigned int block_count;
|
|
uint32_t data_pos, data_size;
|
|
ssize_t r;
|
|
ssize_t bytes_written, bytes_to_write;
|
|
unsigned char *b;
|
|
|
|
block_info = (uint32_t *)(a->resource_fork + RSRC_H_SIZE);
|
|
block_count = archive_le32dec(block_info++);
|
|
while (block_count--) {
|
|
data_pos = RSRC_H_SIZE + archive_le32dec(block_info++);
|
|
data_size = archive_le32dec(block_info++);
|
|
r = fgetxattr(a->fd, XATTR_RESOURCEFORK_NAME,
|
|
a->compressed_buffer, data_size, data_pos, 0);
|
|
if (r != data_size) {
|
|
archive_set_error(&a->archive,
|
|
(r < 0)?errno:ARCHIVE_ERRNO_MISC,
|
|
"Failed to read resource fork");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
if (a->compressed_buffer[0] == 0xff) {
|
|
bytes_to_write = data_size -1;
|
|
b = a->compressed_buffer + 1;
|
|
} else {
|
|
uLong dest_len = MAX_DECMPFS_BLOCK_SIZE;
|
|
int zr;
|
|
|
|
zr = uncompress((Bytef *)a->uncompressed_buffer,
|
|
&dest_len, a->compressed_buffer, data_size);
|
|
if (zr != Z_OK) {
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Failed to decompress resource fork");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
bytes_to_write = dest_len;
|
|
b = (unsigned char *)a->uncompressed_buffer;
|
|
}
|
|
do {
|
|
bytes_written = write(a->fd, b, bytes_to_write);
|
|
if (bytes_written < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Write failed");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
bytes_to_write -= bytes_written;
|
|
b += bytes_written;
|
|
} while (bytes_to_write > 0);
|
|
}
|
|
r = fremovexattr(a->fd, XATTR_RESOURCEFORK_NAME, 0);
|
|
if (r == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to remove resource fork");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
hfs_drive_compressor(struct archive_write_disk *a, const char *buff,
|
|
size_t size)
|
|
{
|
|
unsigned char *buffer_compressed;
|
|
size_t bytes_compressed;
|
|
size_t bytes_used;
|
|
int ret;
|
|
|
|
ret = hfs_reset_compressor(a);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
|
|
if (a->compressed_buffer == NULL) {
|
|
size_t block_size;
|
|
|
|
block_size = COMPRESSED_W_SIZE + RSRC_F_SIZE +
|
|
+ compressBound(MAX_DECMPFS_BLOCK_SIZE);
|
|
a->compressed_buffer = malloc(block_size);
|
|
if (a->compressed_buffer == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for Resource Fork");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
a->compressed_buffer_size = block_size;
|
|
a->compressed_buffer_remaining = block_size;
|
|
}
|
|
|
|
buffer_compressed = a->compressed_buffer +
|
|
a->compressed_buffer_size - a->compressed_buffer_remaining;
|
|
a->stream.next_in = (Bytef *)(uintptr_t)(const void *)buff;
|
|
a->stream.avail_in = size;
|
|
a->stream.next_out = buffer_compressed;
|
|
a->stream.avail_out = a->compressed_buffer_remaining;
|
|
do {
|
|
ret = deflate(&a->stream, Z_FINISH);
|
|
switch (ret) {
|
|
case Z_OK:
|
|
case Z_STREAM_END:
|
|
break;
|
|
default:
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
|
|
"Failed to compress data");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
} while (ret == Z_OK);
|
|
bytes_compressed = a->compressed_buffer_remaining - a->stream.avail_out;
|
|
|
|
/*
|
|
* If the compressed size is larger than the original size,
|
|
* throw away compressed data, use uncompressed data instead.
|
|
*/
|
|
if (bytes_compressed > size) {
|
|
buffer_compressed[0] = 0xFF;/* uncompressed marker. */
|
|
memcpy(buffer_compressed + 1, buff, size);
|
|
bytes_compressed = size + 1;
|
|
}
|
|
a->compressed_buffer_remaining -= bytes_compressed;
|
|
|
|
/*
|
|
* If the compressed size is smaller than MAX_DECMPFS_XATTR_SIZE
|
|
* and the block count in the file is only one, store compressed
|
|
* data to decmpfs xattr instead of the resource fork.
|
|
*/
|
|
if (a->decmpfs_block_count == 1 &&
|
|
(a->decmpfs_attr_size + bytes_compressed)
|
|
<= MAX_DECMPFS_XATTR_SIZE) {
|
|
archive_le32enc(&a->decmpfs_header_p[DECMPFS_COMPRESSION_TYPE],
|
|
CMP_XATTR);
|
|
memcpy(a->decmpfs_header_p + DECMPFS_HEADER_SIZE,
|
|
buffer_compressed, bytes_compressed);
|
|
a->decmpfs_attr_size += bytes_compressed;
|
|
a->compressed_buffer_remaining = a->compressed_buffer_size;
|
|
/*
|
|
* Finish HFS+ Compression.
|
|
* - Write the decmpfs xattr.
|
|
* - Set the UF_COMPRESSED file flag.
|
|
*/
|
|
ret = hfs_write_decmpfs(a);
|
|
if (ret == ARCHIVE_OK)
|
|
ret = hfs_set_compressed_fflag(a);
|
|
return (ret);
|
|
}
|
|
|
|
/* Update block info. */
|
|
archive_le32enc(a->decmpfs_block_info++,
|
|
a->compressed_rsrc_position_v - RSRC_H_SIZE);
|
|
archive_le32enc(a->decmpfs_block_info++, bytes_compressed);
|
|
a->compressed_rsrc_position_v += bytes_compressed;
|
|
|
|
/*
|
|
* Write the compressed data to the resource fork.
|
|
*/
|
|
bytes_used = a->compressed_buffer_size - a->compressed_buffer_remaining;
|
|
while (bytes_used >= COMPRESSED_W_SIZE) {
|
|
ret = hfs_write_compressed_data(a, COMPRESSED_W_SIZE);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
bytes_used -= COMPRESSED_W_SIZE;
|
|
if (bytes_used > COMPRESSED_W_SIZE)
|
|
memmove(a->compressed_buffer,
|
|
a->compressed_buffer + COMPRESSED_W_SIZE,
|
|
bytes_used);
|
|
else
|
|
memcpy(a->compressed_buffer,
|
|
a->compressed_buffer + COMPRESSED_W_SIZE,
|
|
bytes_used);
|
|
}
|
|
a->compressed_buffer_remaining = a->compressed_buffer_size - bytes_used;
|
|
|
|
/*
|
|
* If the current block is the last block, write the remaining
|
|
* compressed data and the resource fork footer.
|
|
*/
|
|
if (a->file_remaining_bytes == 0) {
|
|
size_t rsrc_size;
|
|
int64_t bk;
|
|
|
|
/* Append the resource footer. */
|
|
rsrc_size = hfs_set_resource_fork_footer(
|
|
a->compressed_buffer + bytes_used,
|
|
a->compressed_buffer_remaining);
|
|
ret = hfs_write_compressed_data(a, bytes_used + rsrc_size);
|
|
a->compressed_buffer_remaining = a->compressed_buffer_size;
|
|
|
|
/* If the compressed size is not enouph smaller than
|
|
* the uncompressed size. cancel HFS+ compression.
|
|
* TODO: study a behavior of ditto utility and improve
|
|
* the condition to fall back into no HFS+ compression. */
|
|
bk = HFS_BLOCKS(a->compressed_rsrc_position);
|
|
bk += bk >> 7;
|
|
if (bk > HFS_BLOCKS(a->filesize))
|
|
return hfs_decompress(a);
|
|
/*
|
|
* Write the resourcefork header.
|
|
*/
|
|
if (ret == ARCHIVE_OK)
|
|
ret = hfs_write_resource_fork_header(a);
|
|
/*
|
|
* Finish HFS+ Compression.
|
|
* - Write the decmpfs xattr.
|
|
* - Set the UF_COMPRESSED file flag.
|
|
*/
|
|
if (ret == ARCHIVE_OK)
|
|
ret = hfs_write_decmpfs(a);
|
|
if (ret == ARCHIVE_OK)
|
|
ret = hfs_set_compressed_fflag(a);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static ssize_t
|
|
hfs_write_decmpfs_block(struct archive_write_disk *a, const char *buff,
|
|
size_t size)
|
|
{
|
|
const char *buffer_to_write;
|
|
size_t bytes_to_write;
|
|
int ret;
|
|
|
|
if (a->decmpfs_block_count == (unsigned)-1) {
|
|
void *new_block;
|
|
size_t new_size;
|
|
unsigned int block_count;
|
|
|
|
if (a->decmpfs_header_p == NULL) {
|
|
new_block = malloc(MAX_DECMPFS_XATTR_SIZE
|
|
+ sizeof(uint32_t));
|
|
if (new_block == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for decmpfs");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
a->decmpfs_header_p = new_block;
|
|
}
|
|
a->decmpfs_attr_size = DECMPFS_HEADER_SIZE;
|
|
archive_le32enc(&a->decmpfs_header_p[DECMPFS_COMPRESSION_MAGIC],
|
|
DECMPFS_MAGIC);
|
|
archive_le32enc(&a->decmpfs_header_p[DECMPFS_COMPRESSION_TYPE],
|
|
CMP_RESOURCE_FORK);
|
|
archive_le64enc(&a->decmpfs_header_p[DECMPFS_UNCOMPRESSED_SIZE],
|
|
a->filesize);
|
|
|
|
/* Calculate a block count of the file. */
|
|
block_count =
|
|
(a->filesize + MAX_DECMPFS_BLOCK_SIZE -1) /
|
|
MAX_DECMPFS_BLOCK_SIZE;
|
|
/*
|
|
* Allocate buffer for resource fork.
|
|
* Set up related pointers;
|
|
*/
|
|
new_size =
|
|
RSRC_H_SIZE + /* header */
|
|
4 + /* Block count */
|
|
(block_count * sizeof(uint32_t) * 2) +
|
|
RSRC_F_SIZE; /* footer */
|
|
if (new_size > a->resource_fork_allocated_size) {
|
|
new_block = realloc(a->resource_fork, new_size);
|
|
if (new_block == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for ResourceFork");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
a->resource_fork_allocated_size = new_size;
|
|
a->resource_fork = new_block;
|
|
}
|
|
|
|
/* Allocate uncompressed buffer */
|
|
if (a->uncompressed_buffer == NULL) {
|
|
new_block = malloc(MAX_DECMPFS_BLOCK_SIZE);
|
|
if (new_block == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for decmpfs");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
a->uncompressed_buffer = new_block;
|
|
}
|
|
a->block_remaining_bytes = MAX_DECMPFS_BLOCK_SIZE;
|
|
a->file_remaining_bytes = a->filesize;
|
|
a->compressed_buffer_remaining = a->compressed_buffer_size;
|
|
|
|
/*
|
|
* Set up a resource fork.
|
|
*/
|
|
a->rsrc_xattr_options = XATTR_CREATE;
|
|
/* Get the position where we are going to set a bunch
|
|
* of block info. */
|
|
a->decmpfs_block_info =
|
|
(uint32_t *)(a->resource_fork + RSRC_H_SIZE);
|
|
/* Set the block count to the resource fork. */
|
|
archive_le32enc(a->decmpfs_block_info++, block_count);
|
|
/* Get the position where we are goint to set compressed
|
|
* data. */
|
|
a->compressed_rsrc_position =
|
|
RSRC_H_SIZE + 4 + (block_count * 8);
|
|
a->compressed_rsrc_position_v = a->compressed_rsrc_position;
|
|
a->decmpfs_block_count = block_count;
|
|
}
|
|
|
|
/* Ignore redundant bytes. */
|
|
if (a->file_remaining_bytes == 0)
|
|
return ((ssize_t)size);
|
|
|
|
/* Do not overrun a block size. */
|
|
if (size > a->block_remaining_bytes)
|
|
bytes_to_write = a->block_remaining_bytes;
|
|
else
|
|
bytes_to_write = size;
|
|
/* Do not overrun the file size. */
|
|
if (bytes_to_write > a->file_remaining_bytes)
|
|
bytes_to_write = a->file_remaining_bytes;
|
|
|
|
/* For efficiency, if a copy length is full of the uncompressed
|
|
* buffer size, do not copy writing data to it. */
|
|
if (bytes_to_write == MAX_DECMPFS_BLOCK_SIZE)
|
|
buffer_to_write = buff;
|
|
else {
|
|
memcpy(a->uncompressed_buffer +
|
|
MAX_DECMPFS_BLOCK_SIZE - a->block_remaining_bytes,
|
|
buff, bytes_to_write);
|
|
buffer_to_write = a->uncompressed_buffer;
|
|
}
|
|
a->block_remaining_bytes -= bytes_to_write;
|
|
a->file_remaining_bytes -= bytes_to_write;
|
|
|
|
if (a->block_remaining_bytes == 0 || a->file_remaining_bytes == 0) {
|
|
ret = hfs_drive_compressor(a, buffer_to_write,
|
|
MAX_DECMPFS_BLOCK_SIZE - a->block_remaining_bytes);
|
|
if (ret < 0)
|
|
return (ret);
|
|
a->block_remaining_bytes = MAX_DECMPFS_BLOCK_SIZE;
|
|
}
|
|
/* Ignore redundant bytes. */
|
|
if (a->file_remaining_bytes == 0)
|
|
return ((ssize_t)size);
|
|
return (bytes_to_write);
|
|
}
|
|
|
|
static ssize_t
|
|
hfs_write_data_block(struct archive_write_disk *a, const char *buff,
|
|
size_t size)
|
|
{
|
|
uint64_t start_size = size;
|
|
ssize_t bytes_written = 0;
|
|
ssize_t bytes_to_write;
|
|
|
|
if (size == 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
if (a->filesize == 0 || a->fd < 0) {
|
|
archive_set_error(&a->archive, 0,
|
|
"Attempt to write to an empty file");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
/* If this write would run beyond the file size, truncate it. */
|
|
if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
|
|
start_size = size = (size_t)(a->filesize - a->offset);
|
|
|
|
/* Write the data. */
|
|
while (size > 0) {
|
|
bytes_to_write = size;
|
|
/* Seek if necessary to the specified offset. */
|
|
if (a->offset < a->fd_offset) {
|
|
/* Can't support backword move. */
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
|
|
"Seek failed");
|
|
return (ARCHIVE_FATAL);
|
|
} else if (a->offset > a->fd_offset) {
|
|
int64_t skip = a->offset - a->fd_offset;
|
|
char nullblock[1024];
|
|
|
|
memset(nullblock, 0, sizeof(nullblock));
|
|
while (skip > 0) {
|
|
if (skip > (int64_t)sizeof(nullblock))
|
|
bytes_written = hfs_write_decmpfs_block(
|
|
a, nullblock, sizeof(nullblock));
|
|
else
|
|
bytes_written = hfs_write_decmpfs_block(
|
|
a, nullblock, skip);
|
|
if (bytes_written < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Write failed");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
skip -= bytes_written;
|
|
}
|
|
|
|
a->fd_offset = a->offset;
|
|
}
|
|
bytes_written =
|
|
hfs_write_decmpfs_block(a, buff, bytes_to_write);
|
|
if (bytes_written < 0)
|
|
return (bytes_written);
|
|
buff += bytes_written;
|
|
size -= bytes_written;
|
|
a->total_bytes_written += bytes_written;
|
|
a->offset += bytes_written;
|
|
a->fd_offset = a->offset;
|
|
}
|
|
return (start_size - size);
|
|
}
|
|
#else
|
|
static ssize_t
|
|
hfs_write_data_block(struct archive_write_disk *a, const char *buff,
|
|
size_t size)
|
|
{
|
|
return (write_data_block(a, buff, size));
|
|
}
|
|
#endif
|
|
|
|
static ssize_t
|
|
_archive_write_disk_data_block(struct archive *_a,
|
|
const void *buff, size_t size, int64_t offset)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
ssize_t r;
|
|
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_DATA, "archive_write_data_block");
|
|
|
|
a->offset = offset;
|
|
if (a->todo & TODO_HFS_COMPRESSION)
|
|
r = hfs_write_data_block(a, buff, size);
|
|
else
|
|
r = write_data_block(a, buff, size);
|
|
if (r < ARCHIVE_OK)
|
|
return (r);
|
|
if ((size_t)r < size) {
|
|
archive_set_error(&a->archive, 0,
|
|
"Too much data: Truncating file at %ju bytes", (uintmax_t)a->filesize);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
#if ARCHIVE_VERSION_NUMBER < 3999000
|
|
return (ARCHIVE_OK);
|
|
#else
|
|
return (size);
|
|
#endif
|
|
}
|
|
|
|
static ssize_t
|
|
_archive_write_disk_data(struct archive *_a, const void *buff, size_t size)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_DATA, "archive_write_data");
|
|
|
|
if (a->todo & TODO_HFS_COMPRESSION)
|
|
return (hfs_write_data_block(a, buff, size));
|
|
return (write_data_block(a, buff, size));
|
|
}
|
|
|
|
static int
|
|
_archive_write_disk_finish_entry(struct archive *_a)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
int ret = ARCHIVE_OK;
|
|
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
|
|
"archive_write_finish_entry");
|
|
if (a->archive.state & ARCHIVE_STATE_HEADER)
|
|
return (ARCHIVE_OK);
|
|
archive_clear_error(&a->archive);
|
|
|
|
/* Pad or truncate file to the right size. */
|
|
if (a->fd < 0) {
|
|
/* There's no file. */
|
|
} else if (a->filesize < 0) {
|
|
/* File size is unknown, so we can't set the size. */
|
|
} else if (a->fd_offset == a->filesize) {
|
|
/* Last write ended at exactly the filesize; we're done. */
|
|
/* Hopefully, this is the common case. */
|
|
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
|
|
} else if (a->todo & TODO_HFS_COMPRESSION) {
|
|
char null_d[1024];
|
|
ssize_t r;
|
|
|
|
if (a->file_remaining_bytes)
|
|
memset(null_d, 0, sizeof(null_d));
|
|
while (a->file_remaining_bytes) {
|
|
if (a->file_remaining_bytes > sizeof(null_d))
|
|
r = hfs_write_data_block(
|
|
a, null_d, sizeof(null_d));
|
|
else
|
|
r = hfs_write_data_block(
|
|
a, null_d, a->file_remaining_bytes);
|
|
if (r < 0)
|
|
return ((int)r);
|
|
}
|
|
#endif
|
|
} else {
|
|
#if HAVE_FTRUNCATE
|
|
if (ftruncate(a->fd, a->filesize) == -1 &&
|
|
a->filesize == 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"File size could not be restored");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
#endif
|
|
/*
|
|
* Not all platforms implement the XSI option to
|
|
* extend files via ftruncate. Stat() the file again
|
|
* to see what happened.
|
|
*/
|
|
a->pst = NULL;
|
|
if ((ret = lazy_stat(a)) != ARCHIVE_OK)
|
|
return (ret);
|
|
/* We can use lseek()/write() to extend the file if
|
|
* ftruncate didn't work or isn't available. */
|
|
if (a->st.st_size < a->filesize) {
|
|
const char nul = '\0';
|
|
if (lseek(a->fd, a->filesize - 1, SEEK_SET) < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Seek failed");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
if (write(a->fd, &nul, 1) < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Write to restore size failed");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
a->pst = NULL;
|
|
}
|
|
}
|
|
|
|
/* Restore metadata. */
|
|
|
|
/*
|
|
* This is specific to Mac OS X.
|
|
* If the current file is an AppleDouble file, it should be
|
|
* linked with the data fork file and remove it.
|
|
*/
|
|
if (a->todo & TODO_APPLEDOUBLE) {
|
|
int r2 = fixup_appledouble(a, a->name);
|
|
if (r2 == ARCHIVE_EOF) {
|
|
/* The current file has been successfully linked
|
|
* with the data fork file and removed. So there
|
|
* is nothing to do on the current file. */
|
|
goto finish_metadata;
|
|
}
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
/*
|
|
* Look up the "real" UID only if we're going to need it.
|
|
* TODO: the TODO_SGID condition can be dropped here, can't it?
|
|
*/
|
|
if (a->todo & (TODO_OWNER | TODO_SUID | TODO_SGID)) {
|
|
a->uid = archive_write_disk_uid(&a->archive,
|
|
archive_entry_uname(a->entry),
|
|
archive_entry_uid(a->entry));
|
|
}
|
|
/* Look up the "real" GID only if we're going to need it. */
|
|
/* TODO: the TODO_SUID condition can be dropped here, can't it? */
|
|
if (a->todo & (TODO_OWNER | TODO_SGID | TODO_SUID)) {
|
|
a->gid = archive_write_disk_gid(&a->archive,
|
|
archive_entry_gname(a->entry),
|
|
archive_entry_gid(a->entry));
|
|
}
|
|
|
|
/*
|
|
* Restore ownership before set_mode tries to restore suid/sgid
|
|
* bits. If we set the owner, we know what it is and can skip
|
|
* a stat() call to examine the ownership of the file on disk.
|
|
*/
|
|
if (a->todo & TODO_OWNER) {
|
|
int r2 = set_ownership(a);
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
/*
|
|
* set_mode must precede ACLs on systems such as Solaris and
|
|
* FreeBSD where setting the mode implicitly clears extended ACLs
|
|
*/
|
|
if (a->todo & TODO_MODE) {
|
|
int r2 = set_mode(a, a->mode);
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
/*
|
|
* Security-related extended attributes (such as
|
|
* security.capability on Linux) have to be restored last,
|
|
* since they're implicitly removed by other file changes.
|
|
*/
|
|
if (a->todo & TODO_XATTR) {
|
|
int r2 = set_xattrs(a);
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
/*
|
|
* Some flags prevent file modification; they must be restored after
|
|
* file contents are written.
|
|
*/
|
|
if (a->todo & TODO_FFLAGS) {
|
|
int r2 = set_fflags(a);
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
/*
|
|
* Time must follow most other metadata;
|
|
* otherwise atime will get changed.
|
|
*/
|
|
if (a->todo & TODO_TIMES) {
|
|
int r2 = set_times_from_entry(a);
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
/*
|
|
* Mac extended metadata includes ACLs.
|
|
*/
|
|
if (a->todo & TODO_MAC_METADATA) {
|
|
const void *metadata;
|
|
size_t metadata_size;
|
|
metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
|
|
if (metadata != NULL && metadata_size > 0) {
|
|
int r2 = set_mac_metadata(a, archive_entry_pathname(
|
|
a->entry), metadata, metadata_size);
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ACLs must be restored after timestamps because there are
|
|
* ACLs that prevent attribute changes (including time).
|
|
*/
|
|
if (a->todo & TODO_ACLS) {
|
|
int r2 = archive_write_disk_set_acls(&a->archive, a->fd,
|
|
archive_entry_pathname(a->entry),
|
|
archive_entry_acl(a->entry));
|
|
if (r2 < ret) ret = r2;
|
|
}
|
|
|
|
finish_metadata:
|
|
/* If there's an fd, we can close it now. */
|
|
if (a->fd >= 0) {
|
|
close(a->fd);
|
|
a->fd = -1;
|
|
}
|
|
/* If there's an entry, we can release it now. */
|
|
if (a->entry) {
|
|
archive_entry_free(a->entry);
|
|
a->entry = NULL;
|
|
}
|
|
a->archive.state = ARCHIVE_STATE_HEADER;
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
archive_write_disk_set_group_lookup(struct archive *_a,
|
|
void *private_data,
|
|
int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid),
|
|
void (*cleanup_gid)(void *private))
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_ANY, "archive_write_disk_set_group_lookup");
|
|
|
|
if (a->cleanup_gid != NULL && a->lookup_gid_data != NULL)
|
|
(a->cleanup_gid)(a->lookup_gid_data);
|
|
|
|
a->lookup_gid = lookup_gid;
|
|
a->cleanup_gid = cleanup_gid;
|
|
a->lookup_gid_data = private_data;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
int
|
|
archive_write_disk_set_user_lookup(struct archive *_a,
|
|
void *private_data,
|
|
int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid),
|
|
void (*cleanup_uid)(void *private))
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_ANY, "archive_write_disk_set_user_lookup");
|
|
|
|
if (a->cleanup_uid != NULL && a->lookup_uid_data != NULL)
|
|
(a->cleanup_uid)(a->lookup_uid_data);
|
|
|
|
a->lookup_uid = lookup_uid;
|
|
a->cleanup_uid = cleanup_uid;
|
|
a->lookup_uid_data = private_data;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
int64_t
|
|
archive_write_disk_gid(struct archive *_a, const char *name, int64_t id)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_ANY, "archive_write_disk_gid");
|
|
if (a->lookup_gid)
|
|
return (a->lookup_gid)(a->lookup_gid_data, name, id);
|
|
return (id);
|
|
}
|
|
|
|
int64_t
|
|
archive_write_disk_uid(struct archive *_a, const char *name, int64_t id)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_ANY, "archive_write_disk_uid");
|
|
if (a->lookup_uid)
|
|
return (a->lookup_uid)(a->lookup_uid_data, name, id);
|
|
return (id);
|
|
}
|
|
|
|
/*
|
|
* Create a new archive_write_disk object and initialize it with global state.
|
|
*/
|
|
struct archive *
|
|
archive_write_disk_new(void)
|
|
{
|
|
struct archive_write_disk *a;
|
|
|
|
a = (struct archive_write_disk *)malloc(sizeof(*a));
|
|
if (a == NULL)
|
|
return (NULL);
|
|
memset(a, 0, sizeof(*a));
|
|
a->archive.magic = ARCHIVE_WRITE_DISK_MAGIC;
|
|
/* We're ready to write a header immediately. */
|
|
a->archive.state = ARCHIVE_STATE_HEADER;
|
|
a->archive.vtable = archive_write_disk_vtable();
|
|
a->start_time = time(NULL);
|
|
/* Query and restore the umask. */
|
|
umask(a->user_umask = umask(0));
|
|
#ifdef HAVE_GETEUID
|
|
a->user_uid = geteuid();
|
|
#endif /* HAVE_GETEUID */
|
|
if (archive_string_ensure(&a->path_safe, 512) == NULL) {
|
|
free(a);
|
|
return (NULL);
|
|
}
|
|
#ifdef HAVE_ZLIB_H
|
|
a->decmpfs_compression_level = 5;
|
|
#endif
|
|
return (&a->archive);
|
|
}
|
|
|
|
|
|
/*
|
|
* If pathname is longer than PATH_MAX, chdir to a suitable
|
|
* intermediate dir and edit the path down to a shorter suffix. Note
|
|
* that this routine never returns an error; if the chdir() attempt
|
|
* fails for any reason, we just go ahead with the long pathname. The
|
|
* object creation is likely to fail, but any error will get handled
|
|
* at that time.
|
|
*/
|
|
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
|
|
static void
|
|
edit_deep_directories(struct archive_write_disk *a)
|
|
{
|
|
int ret;
|
|
char *tail = a->name;
|
|
|
|
/* If path is short, avoid the open() below. */
|
|
if (strlen(tail) <= PATH_MAX)
|
|
return;
|
|
|
|
/* Try to record our starting dir. */
|
|
a->restore_pwd = open(".", O_RDONLY | O_BINARY | O_CLOEXEC);
|
|
__archive_ensure_cloexec_flag(a->restore_pwd);
|
|
if (a->restore_pwd < 0)
|
|
return;
|
|
|
|
/* As long as the path is too long... */
|
|
while (strlen(tail) > PATH_MAX) {
|
|
/* Locate a dir prefix shorter than PATH_MAX. */
|
|
tail += PATH_MAX - 8;
|
|
while (tail > a->name && *tail != '/')
|
|
tail--;
|
|
/* Exit if we find a too-long path component. */
|
|
if (tail <= a->name)
|
|
return;
|
|
/* Create the intermediate dir and chdir to it. */
|
|
*tail = '\0'; /* Terminate dir portion */
|
|
ret = create_dir(a, a->name);
|
|
if (ret == ARCHIVE_OK && chdir(a->name) != 0)
|
|
ret = ARCHIVE_FAILED;
|
|
*tail = '/'; /* Restore the / we removed. */
|
|
if (ret != ARCHIVE_OK)
|
|
return;
|
|
tail++;
|
|
/* The chdir() succeeded; we've now shortened the path. */
|
|
a->name = tail;
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* The main restore function.
|
|
*/
|
|
static int
|
|
restore_entry(struct archive_write_disk *a)
|
|
{
|
|
int ret = ARCHIVE_OK, en;
|
|
|
|
if (a->flags & ARCHIVE_EXTRACT_UNLINK && !S_ISDIR(a->mode)) {
|
|
/*
|
|
* TODO: Fix this. Apparently, there are platforms
|
|
* that still allow root to hose the entire filesystem
|
|
* by unlinking a dir. The S_ISDIR() test above
|
|
* prevents us from using unlink() here if the new
|
|
* object is a dir, but that doesn't mean the old
|
|
* object isn't a dir.
|
|
*/
|
|
if (a->flags & ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS)
|
|
(void)clear_nochange_fflags(a);
|
|
if (unlink(a->name) == 0) {
|
|
/* We removed it, reset cached stat. */
|
|
a->pst = NULL;
|
|
} else if (errno == ENOENT) {
|
|
/* File didn't exist, that's just as good. */
|
|
} else if (rmdir(a->name) == 0) {
|
|
/* It was a dir, but now it's gone. */
|
|
a->pst = NULL;
|
|
} else {
|
|
/* We tried, but couldn't get rid of it. */
|
|
archive_set_error(&a->archive, errno,
|
|
"Could not unlink");
|
|
return(ARCHIVE_FAILED);
|
|
}
|
|
}
|
|
|
|
/* Try creating it first; if this fails, we'll try to recover. */
|
|
en = create_filesystem_object(a);
|
|
|
|
if ((en == ENOTDIR || en == ENOENT)
|
|
&& !(a->flags & ARCHIVE_EXTRACT_NO_AUTODIR)) {
|
|
/* If the parent dir doesn't exist, try creating it. */
|
|
create_parent_dir(a, a->name);
|
|
/* Now try to create the object again. */
|
|
en = create_filesystem_object(a);
|
|
}
|
|
|
|
if ((en == ENOENT) && (archive_entry_hardlink(a->entry) != NULL)) {
|
|
archive_set_error(&a->archive, en,
|
|
"Hard-link target '%s' does not exist.",
|
|
archive_entry_hardlink(a->entry));
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
if ((en == EISDIR || en == EEXIST)
|
|
&& (a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
|
|
/* If we're not overwriting, we're done. */
|
|
archive_entry_unset_size(a->entry);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* Some platforms return EISDIR if you call
|
|
* open(O_WRONLY | O_EXCL | O_CREAT) on a directory, some
|
|
* return EEXIST. POSIX is ambiguous, requiring EISDIR
|
|
* for open(O_WRONLY) on a dir and EEXIST for open(O_EXCL | O_CREAT)
|
|
* on an existing item.
|
|
*/
|
|
if (en == EISDIR) {
|
|
/* A dir is in the way of a non-dir, rmdir it. */
|
|
if (rmdir(a->name) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't remove already-existing dir");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
a->pst = NULL;
|
|
/* Try again. */
|
|
en = create_filesystem_object(a);
|
|
} else if (en == EEXIST) {
|
|
/*
|
|
* We know something is in the way, but we don't know what;
|
|
* we need to find out before we go any further.
|
|
*/
|
|
int r = 0;
|
|
/*
|
|
* The SECURE_SYMLINKS logic has already removed a
|
|
* symlink to a dir if the client wants that. So
|
|
* follow the symlink if we're creating a dir.
|
|
*/
|
|
if (S_ISDIR(a->mode))
|
|
r = stat(a->name, &a->st);
|
|
/*
|
|
* If it's not a dir (or it's a broken symlink),
|
|
* then don't follow it.
|
|
*/
|
|
if (r != 0 || !S_ISDIR(a->mode))
|
|
r = lstat(a->name, &a->st);
|
|
if (r != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't stat existing object");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
/*
|
|
* NO_OVERWRITE_NEWER doesn't apply to directories.
|
|
*/
|
|
if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER)
|
|
&& !S_ISDIR(a->st.st_mode)) {
|
|
if (!older(&(a->st), a->entry)) {
|
|
archive_entry_unset_size(a->entry);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
}
|
|
|
|
/* If it's our archive, we're done. */
|
|
if (a->skip_file_set &&
|
|
a->st.st_dev == (dev_t)a->skip_file_dev &&
|
|
a->st.st_ino == (ino_t)a->skip_file_ino) {
|
|
archive_set_error(&a->archive, 0,
|
|
"Refusing to overwrite archive");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
if (!S_ISDIR(a->st.st_mode)) {
|
|
/* A non-dir is in the way, unlink it. */
|
|
if (a->flags & ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS)
|
|
(void)clear_nochange_fflags(a);
|
|
if (unlink(a->name) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't unlink already-existing object");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
a->pst = NULL;
|
|
/* Try again. */
|
|
en = create_filesystem_object(a);
|
|
} else if (!S_ISDIR(a->mode)) {
|
|
/* A dir is in the way of a non-dir, rmdir it. */
|
|
if (a->flags & ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS)
|
|
(void)clear_nochange_fflags(a);
|
|
if (rmdir(a->name) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't replace existing directory with non-directory");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
/* Try again. */
|
|
en = create_filesystem_object(a);
|
|
} else {
|
|
/*
|
|
* There's a dir in the way of a dir. Don't
|
|
* waste time with rmdir()/mkdir(), just fix
|
|
* up the permissions on the existing dir.
|
|
* Note that we don't change perms on existing
|
|
* dirs unless _EXTRACT_PERM is specified.
|
|
*/
|
|
if ((a->mode != a->st.st_mode)
|
|
&& (a->todo & TODO_MODE_FORCE))
|
|
a->deferred |= (a->todo & TODO_MODE);
|
|
/* Ownership doesn't need deferred fixup. */
|
|
en = 0; /* Forget the EEXIST. */
|
|
}
|
|
}
|
|
|
|
if (en) {
|
|
/* Everything failed; give up here. */
|
|
archive_set_error(&a->archive, en, "Can't create '%s'",
|
|
a->name);
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
a->pst = NULL; /* Cached stat data no longer valid. */
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Returns 0 if creation succeeds, or else returns errno value from
|
|
* the failed system call. Note: This function should only ever perform
|
|
* a single system call.
|
|
*/
|
|
static int
|
|
create_filesystem_object(struct archive_write_disk *a)
|
|
{
|
|
/* Create the entry. */
|
|
const char *linkname;
|
|
mode_t final_mode, mode;
|
|
int r;
|
|
|
|
/* We identify hard/symlinks according to the link names. */
|
|
/* Since link(2) and symlink(2) don't handle modes, we're done here. */
|
|
linkname = archive_entry_hardlink(a->entry);
|
|
if (linkname != NULL) {
|
|
#if !HAVE_LINK
|
|
return (EPERM);
|
|
#else
|
|
r = link(linkname, a->name) ? errno : 0;
|
|
/*
|
|
* New cpio and pax formats allow hardlink entries
|
|
* to carry data, so we may have to open the file
|
|
* for hardlink entries.
|
|
*
|
|
* If the hardlink was successfully created and
|
|
* the archive doesn't have carry data for it,
|
|
* consider it to be non-authoritative for meta data.
|
|
* This is consistent with GNU tar and BSD pax.
|
|
* If the hardlink does carry data, let the last
|
|
* archive entry decide ownership.
|
|
*/
|
|
if (r == 0 && a->filesize <= 0) {
|
|
a->todo = 0;
|
|
a->deferred = 0;
|
|
} else if (r == 0 && a->filesize > 0) {
|
|
a->fd = open(a->name,
|
|
O_WRONLY | O_TRUNC | O_BINARY | O_CLOEXEC);
|
|
__archive_ensure_cloexec_flag(a->fd);
|
|
if (a->fd < 0)
|
|
r = errno;
|
|
}
|
|
return (r);
|
|
#endif
|
|
}
|
|
linkname = archive_entry_symlink(a->entry);
|
|
if (linkname != NULL) {
|
|
#if HAVE_SYMLINK
|
|
return symlink(linkname, a->name) ? errno : 0;
|
|
#else
|
|
return (EPERM);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* The remaining system calls all set permissions, so let's
|
|
* try to take advantage of that to avoid an extra chmod()
|
|
* call. (Recall that umask is set to zero right now!)
|
|
*/
|
|
|
|
/* Mode we want for the final restored object (w/o file type bits). */
|
|
final_mode = a->mode & 07777;
|
|
/*
|
|
* The mode that will actually be restored in this step. Note
|
|
* that SUID, SGID, etc, require additional work to ensure
|
|
* security, so we never restore them at this point.
|
|
*/
|
|
mode = final_mode & 0777 & ~a->user_umask;
|
|
|
|
switch (a->mode & AE_IFMT) {
|
|
default:
|
|
/* POSIX requires that we fall through here. */
|
|
/* FALLTHROUGH */
|
|
case AE_IFREG:
|
|
a->fd = open(a->name,
|
|
O_WRONLY | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC, mode);
|
|
__archive_ensure_cloexec_flag(a->fd);
|
|
r = (a->fd < 0);
|
|
break;
|
|
case AE_IFCHR:
|
|
#ifdef HAVE_MKNOD
|
|
/* Note: we use AE_IFCHR for the case label, and
|
|
* S_IFCHR for the mknod() call. This is correct. */
|
|
r = mknod(a->name, mode | S_IFCHR,
|
|
archive_entry_rdev(a->entry));
|
|
break;
|
|
#else
|
|
/* TODO: Find a better way to warn about our inability
|
|
* to restore a char device node. */
|
|
return (EINVAL);
|
|
#endif /* HAVE_MKNOD */
|
|
case AE_IFBLK:
|
|
#ifdef HAVE_MKNOD
|
|
r = mknod(a->name, mode | S_IFBLK,
|
|
archive_entry_rdev(a->entry));
|
|
break;
|
|
#else
|
|
/* TODO: Find a better way to warn about our inability
|
|
* to restore a block device node. */
|
|
return (EINVAL);
|
|
#endif /* HAVE_MKNOD */
|
|
case AE_IFDIR:
|
|
mode = (mode | MINIMUM_DIR_MODE) & MAXIMUM_DIR_MODE;
|
|
r = mkdir(a->name, mode);
|
|
if (r == 0) {
|
|
/* Defer setting dir times. */
|
|
a->deferred |= (a->todo & TODO_TIMES);
|
|
a->todo &= ~TODO_TIMES;
|
|
/* Never use an immediate chmod(). */
|
|
/* We can't avoid the chmod() entirely if EXTRACT_PERM
|
|
* because of SysV SGID inheritance. */
|
|
if ((mode != final_mode)
|
|
|| (a->flags & ARCHIVE_EXTRACT_PERM))
|
|
a->deferred |= (a->todo & TODO_MODE);
|
|
a->todo &= ~TODO_MODE;
|
|
}
|
|
break;
|
|
case AE_IFIFO:
|
|
#ifdef HAVE_MKFIFO
|
|
r = mkfifo(a->name, mode);
|
|
break;
|
|
#else
|
|
/* TODO: Find a better way to warn about our inability
|
|
* to restore a fifo. */
|
|
return (EINVAL);
|
|
#endif /* HAVE_MKFIFO */
|
|
}
|
|
|
|
/* All the system calls above set errno on failure. */
|
|
if (r)
|
|
return (errno);
|
|
|
|
/* If we managed to set the final mode, we've avoided a chmod(). */
|
|
if (mode == final_mode)
|
|
a->todo &= ~TODO_MODE;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Cleanup function for archive_extract. Mostly, this involves processing
|
|
* the fixup list, which is used to address a number of problems:
|
|
* * Dir permissions might prevent us from restoring a file in that
|
|
* dir, so we restore the dir with minimum 0700 permissions first,
|
|
* then correct the mode at the end.
|
|
* * Similarly, the act of restoring a file touches the directory
|
|
* and changes the timestamp on the dir, so we have to touch-up dir
|
|
* timestamps at the end as well.
|
|
* * Some file flags can interfere with the restore by, for example,
|
|
* preventing the creation of hardlinks to those files.
|
|
* * Mac OS extended metadata includes ACLs, so must be deferred on dirs.
|
|
*
|
|
* Note that tar/cpio do not require that archives be in a particular
|
|
* order; there is no way to know when the last file has been restored
|
|
* within a directory, so there's no way to optimize the memory usage
|
|
* here by fixing up the directory any earlier than the
|
|
* end-of-archive.
|
|
*
|
|
* XXX TODO: Directory ACLs should be restored here, for the same
|
|
* reason we set directory perms here. XXX
|
|
*/
|
|
static int
|
|
_archive_write_disk_close(struct archive *_a)
|
|
{
|
|
struct archive_write_disk *a = (struct archive_write_disk *)_a;
|
|
struct fixup_entry *next, *p;
|
|
int ret;
|
|
|
|
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
|
|
"archive_write_disk_close");
|
|
ret = _archive_write_disk_finish_entry(&a->archive);
|
|
|
|
/* Sort dir list so directories are fixed up in depth-first order. */
|
|
p = sort_dir_list(a->fixup_list);
|
|
|
|
while (p != NULL) {
|
|
a->pst = NULL; /* Mark stat cache as out-of-date. */
|
|
if (p->fixup & TODO_TIMES) {
|
|
set_times(a, -1, p->mode, p->name,
|
|
p->atime, p->atime_nanos,
|
|
p->birthtime, p->birthtime_nanos,
|
|
p->mtime, p->mtime_nanos,
|
|
p->ctime, p->ctime_nanos);
|
|
}
|
|
if (p->fixup & TODO_MODE_BASE)
|
|
chmod(p->name, p->mode);
|
|
if (p->fixup & TODO_ACLS)
|
|
archive_write_disk_set_acls(&a->archive,
|
|
-1, p->name, &p->acl);
|
|
if (p->fixup & TODO_FFLAGS)
|
|
set_fflags_platform(a, -1, p->name,
|
|
p->mode, p->fflags_set, 0);
|
|
if (p->fixup & TODO_MAC_METADATA)
|
|
set_mac_metadata(a, p->name, p->mac_metadata,
|
|
p->mac_metadata_size);
|
|
next = p->next;
|
|
archive_acl_clear(&p->acl);
|
|
free(p->mac_metadata);
|
|
free(p->name);
|
|
free(p);
|
|
p = next;
|
|
}
|
|
a->fixup_list = NULL;
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
_archive_write_disk_free(struct archive *_a)
|
|
{
|
|
struct archive_write_disk *a;
|
|
int ret;
|
|
if (_a == NULL)
|
|
return (ARCHIVE_OK);
|
|
archive_check_magic(_a, ARCHIVE_WRITE_DISK_MAGIC,
|
|
ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_write_disk_free");
|
|
a = (struct archive_write_disk *)_a;
|
|
ret = _archive_write_disk_close(&a->archive);
|
|
archive_write_disk_set_group_lookup(&a->archive, NULL, NULL, NULL);
|
|
archive_write_disk_set_user_lookup(&a->archive, NULL, NULL, NULL);
|
|
if (a->entry)
|
|
archive_entry_free(a->entry);
|
|
archive_string_free(&a->_name_data);
|
|
archive_string_free(&a->archive.error_string);
|
|
archive_string_free(&a->path_safe);
|
|
a->archive.magic = 0;
|
|
__archive_clean(&a->archive);
|
|
free(a->decmpfs_header_p);
|
|
free(a->resource_fork);
|
|
free(a->compressed_buffer);
|
|
free(a->uncompressed_buffer);
|
|
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_SYS_XATTR_H)\
|
|
&& defined(HAVE_ZLIB_H)
|
|
if (a->stream_valid) {
|
|
switch (deflateEnd(&a->stream)) {
|
|
case Z_OK:
|
|
break;
|
|
default:
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
|
|
"Failed to clean up compressor");
|
|
ret = ARCHIVE_FATAL;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
free(a);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Simple O(n log n) merge sort to order the fixup list. In
|
|
* particular, we want to restore dir timestamps depth-first.
|
|
*/
|
|
static struct fixup_entry *
|
|
sort_dir_list(struct fixup_entry *p)
|
|
{
|
|
struct fixup_entry *a, *b, *t;
|
|
|
|
if (p == NULL)
|
|
return (NULL);
|
|
/* A one-item list is already sorted. */
|
|
if (p->next == NULL)
|
|
return (p);
|
|
|
|
/* Step 1: split the list. */
|
|
t = p;
|
|
a = p->next->next;
|
|
while (a != NULL) {
|
|
/* Step a twice, t once. */
|
|
a = a->next;
|
|
if (a != NULL)
|
|
a = a->next;
|
|
t = t->next;
|
|
}
|
|
/* Now, t is at the mid-point, so break the list here. */
|
|
b = t->next;
|
|
t->next = NULL;
|
|
a = p;
|
|
|
|
/* Step 2: Recursively sort the two sub-lists. */
|
|
a = sort_dir_list(a);
|
|
b = sort_dir_list(b);
|
|
|
|
/* Step 3: Merge the returned lists. */
|
|
/* Pick the first element for the merged list. */
|
|
if (strcmp(a->name, b->name) > 0) {
|
|
t = p = a;
|
|
a = a->next;
|
|
} else {
|
|
t = p = b;
|
|
b = b->next;
|
|
}
|
|
|
|
/* Always put the later element on the list first. */
|
|
while (a != NULL && b != NULL) {
|
|
if (strcmp(a->name, b->name) > 0) {
|
|
t->next = a;
|
|
a = a->next;
|
|
} else {
|
|
t->next = b;
|
|
b = b->next;
|
|
}
|
|
t = t->next;
|
|
}
|
|
|
|
/* Only one list is non-empty, so just splice it on. */
|
|
if (a != NULL)
|
|
t->next = a;
|
|
if (b != NULL)
|
|
t->next = b;
|
|
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* Returns a new, initialized fixup entry.
|
|
*
|
|
* TODO: Reduce the memory requirements for this list by using a tree
|
|
* structure rather than a simple list of names.
|
|
*/
|
|
static struct fixup_entry *
|
|
new_fixup(struct archive_write_disk *a, const char *pathname)
|
|
{
|
|
struct fixup_entry *fe;
|
|
|
|
fe = (struct fixup_entry *)calloc(1, sizeof(struct fixup_entry));
|
|
if (fe == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for a fixup");
|
|
return (NULL);
|
|
}
|
|
fe->next = a->fixup_list;
|
|
a->fixup_list = fe;
|
|
fe->fixup = 0;
|
|
fe->name = strdup(pathname);
|
|
return (fe);
|
|
}
|
|
|
|
/*
|
|
* Returns a fixup structure for the current entry.
|
|
*/
|
|
static struct fixup_entry *
|
|
current_fixup(struct archive_write_disk *a, const char *pathname)
|
|
{
|
|
if (a->current_fixup == NULL)
|
|
a->current_fixup = new_fixup(a, pathname);
|
|
return (a->current_fixup);
|
|
}
|
|
|
|
/* TODO: Make this work. */
|
|
/*
|
|
* TODO: The deep-directory support bypasses this; disable deep directory
|
|
* support if we're doing symlink checks.
|
|
*/
|
|
/*
|
|
* TODO: Someday, integrate this with the deep dir support; they both
|
|
* scan the path and both can be optimized by comparing against other
|
|
* recent paths.
|
|
*/
|
|
/* TODO: Extend this to support symlinks on Windows Vista and later. */
|
|
static int
|
|
check_symlinks(struct archive_write_disk *a)
|
|
{
|
|
#if !defined(HAVE_LSTAT)
|
|
/* Platform doesn't have lstat, so we can't look for symlinks. */
|
|
(void)a; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
#else
|
|
char *pn;
|
|
char c;
|
|
int r;
|
|
struct stat st;
|
|
|
|
/*
|
|
* Guard against symlink tricks. Reject any archive entry whose
|
|
* destination would be altered by a symlink.
|
|
*/
|
|
/* Whatever we checked last time doesn't need to be re-checked. */
|
|
pn = a->name;
|
|
if (archive_strlen(&(a->path_safe)) > 0) {
|
|
char *p = a->path_safe.s;
|
|
while ((*pn != '\0') && (*p == *pn))
|
|
++p, ++pn;
|
|
}
|
|
/* Skip the root directory if the path is absolute. */
|
|
if(pn == a->name && pn[0] == '/')
|
|
++pn;
|
|
c = pn[0];
|
|
/* Keep going until we've checked the entire name. */
|
|
while (pn[0] != '\0' && (pn[0] != '/' || pn[1] != '\0')) {
|
|
/* Skip the next path element. */
|
|
while (*pn != '\0' && *pn != '/')
|
|
++pn;
|
|
c = pn[0];
|
|
pn[0] = '\0';
|
|
/* Check that we haven't hit a symlink. */
|
|
r = lstat(a->name, &st);
|
|
if (r != 0) {
|
|
/* We've hit a dir that doesn't exist; stop now. */
|
|
if (errno == ENOENT)
|
|
break;
|
|
} else if (S_ISLNK(st.st_mode)) {
|
|
if (c == '\0') {
|
|
/*
|
|
* Last element is symlink; remove it
|
|
* so we can overwrite it with the
|
|
* item being extracted.
|
|
*/
|
|
if (unlink(a->name)) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Could not remove symlink %s",
|
|
a->name);
|
|
pn[0] = c;
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
a->pst = NULL;
|
|
/*
|
|
* Even if we did remove it, a warning
|
|
* is in order. The warning is silly,
|
|
* though, if we're just replacing one
|
|
* symlink with another symlink.
|
|
*/
|
|
if (!S_ISLNK(a->mode)) {
|
|
archive_set_error(&a->archive, 0,
|
|
"Removing symlink %s",
|
|
a->name);
|
|
}
|
|
/* Symlink gone. No more problem! */
|
|
pn[0] = c;
|
|
return (0);
|
|
} else if (a->flags & ARCHIVE_EXTRACT_UNLINK) {
|
|
/* User asked us to remove problems. */
|
|
if (unlink(a->name) != 0) {
|
|
archive_set_error(&a->archive, 0,
|
|
"Cannot remove intervening symlink %s",
|
|
a->name);
|
|
pn[0] = c;
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
a->pst = NULL;
|
|
} else {
|
|
archive_set_error(&a->archive, 0,
|
|
"Cannot extract through symlink %s",
|
|
a->name);
|
|
pn[0] = c;
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
}
|
|
pn[0] = c;
|
|
if (pn[0] != '\0')
|
|
pn++; /* Advance to the next segment. */
|
|
}
|
|
pn[0] = c;
|
|
/* We've checked and/or cleaned the whole path, so remember it. */
|
|
archive_strcpy(&a->path_safe, a->name);
|
|
return (ARCHIVE_OK);
|
|
#endif
|
|
}
|
|
|
|
#if defined(__CYGWIN__)
|
|
/*
|
|
* 1. Convert a path separator from '\' to '/' .
|
|
* We shouldn't check multibyte character directly because some
|
|
* character-set have been using the '\' character for a part of
|
|
* its multibyte character code.
|
|
* 2. Replace unusable characters in Windows with underscore('_').
|
|
* See also : http://msdn.microsoft.com/en-us/library/aa365247.aspx
|
|
*/
|
|
static void
|
|
cleanup_pathname_win(struct archive_write_disk *a)
|
|
{
|
|
wchar_t wc;
|
|
char *p;
|
|
size_t alen, l;
|
|
int mb, complete, utf8;
|
|
|
|
alen = 0;
|
|
mb = 0;
|
|
complete = 1;
|
|
utf8 = (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)? 1: 0;
|
|
for (p = a->name; *p != '\0'; p++) {
|
|
++alen;
|
|
if (*p == '\\') {
|
|
/* If previous byte is smaller than 128,
|
|
* this is not second byte of multibyte characters,
|
|
* so we can replace '\' with '/'. */
|
|
if (utf8 || !mb)
|
|
*p = '/';
|
|
else
|
|
complete = 0;/* uncompleted. */
|
|
} else if (*(unsigned char *)p > 127)
|
|
mb = 1;
|
|
else
|
|
mb = 0;
|
|
/* Rewrite the path name if its next character is unusable. */
|
|
if (*p == ':' || *p == '*' || *p == '?' || *p == '"' ||
|
|
*p == '<' || *p == '>' || *p == '|')
|
|
*p = '_';
|
|
}
|
|
if (complete)
|
|
return;
|
|
|
|
/*
|
|
* Convert path separator in wide-character.
|
|
*/
|
|
p = a->name;
|
|
while (*p != '\0' && alen) {
|
|
l = mbtowc(&wc, p, alen);
|
|
if (l == (size_t)-1) {
|
|
while (*p != '\0') {
|
|
if (*p == '\\')
|
|
*p = '/';
|
|
++p;
|
|
}
|
|
break;
|
|
}
|
|
if (l == 1 && wc == L'\\')
|
|
*p = '/';
|
|
p += l;
|
|
alen -= l;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Canonicalize the pathname. In particular, this strips duplicate
|
|
* '/' characters, '.' elements, and trailing '/'. It also raises an
|
|
* error for an empty path, a trailing '..', (if _SECURE_NODOTDOT is
|
|
* set) any '..' in the path or (if ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS
|
|
* is set) if the path is absolute.
|
|
*/
|
|
static int
|
|
cleanup_pathname(struct archive_write_disk *a)
|
|
{
|
|
char *dest, *src;
|
|
char separator = '\0';
|
|
|
|
dest = src = a->name;
|
|
if (*src == '\0') {
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
|
|
"Invalid empty pathname");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
#if defined(__CYGWIN__)
|
|
cleanup_pathname_win(a);
|
|
#endif
|
|
/* Skip leading '/'. */
|
|
if (*src == '/') {
|
|
if (a->flags & ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS) {
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
|
|
"Path is absolute");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
separator = *src++;
|
|
}
|
|
|
|
/* Scan the pathname one element at a time. */
|
|
for (;;) {
|
|
/* src points to first char after '/' */
|
|
if (src[0] == '\0') {
|
|
break;
|
|
} else if (src[0] == '/') {
|
|
/* Found '//', ignore second one. */
|
|
src++;
|
|
continue;
|
|
} else if (src[0] == '.') {
|
|
if (src[1] == '\0') {
|
|
/* Ignore trailing '.' */
|
|
break;
|
|
} else if (src[1] == '/') {
|
|
/* Skip './'. */
|
|
src += 2;
|
|
continue;
|
|
} else if (src[1] == '.') {
|
|
if (src[2] == '/' || src[2] == '\0') {
|
|
/* Conditionally warn about '..' */
|
|
if (a->flags & ARCHIVE_EXTRACT_SECURE_NODOTDOT) {
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Path contains '..'");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
}
|
|
/*
|
|
* Note: Under no circumstances do we
|
|
* remove '..' elements. In
|
|
* particular, restoring
|
|
* '/foo/../bar/' should create the
|
|
* 'foo' dir as a side-effect.
|
|
*/
|
|
}
|
|
}
|
|
|
|
/* Copy current element, including leading '/'. */
|
|
if (separator)
|
|
*dest++ = '/';
|
|
while (*src != '\0' && *src != '/') {
|
|
*dest++ = *src++;
|
|
}
|
|
|
|
if (*src == '\0')
|
|
break;
|
|
|
|
/* Skip '/' separator. */
|
|
separator = *src++;
|
|
}
|
|
/*
|
|
* We've just copied zero or more path elements, not including the
|
|
* final '/'.
|
|
*/
|
|
if (dest == a->name) {
|
|
/*
|
|
* Nothing got copied. The path must have been something
|
|
* like '.' or '/' or './' or '/././././/./'.
|
|
*/
|
|
if (separator)
|
|
*dest++ = '/';
|
|
else
|
|
*dest++ = '.';
|
|
}
|
|
/* Terminate the result. */
|
|
*dest = '\0';
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* Create the parent directory of the specified path, assuming path
|
|
* is already in mutable storage.
|
|
*/
|
|
static int
|
|
create_parent_dir(struct archive_write_disk *a, char *path)
|
|
{
|
|
char *slash;
|
|
int r;
|
|
|
|
/* Remove tail element to obtain parent name. */
|
|
slash = strrchr(path, '/');
|
|
if (slash == NULL)
|
|
return (ARCHIVE_OK);
|
|
*slash = '\0';
|
|
r = create_dir(a, path);
|
|
*slash = '/';
|
|
return (r);
|
|
}
|
|
|
|
/*
|
|
* Create the specified dir, recursing to create parents as necessary.
|
|
*
|
|
* Returns ARCHIVE_OK if the path exists when we're done here.
|
|
* Otherwise, returns ARCHIVE_FAILED.
|
|
* Assumes path is in mutable storage; path is unchanged on exit.
|
|
*/
|
|
static int
|
|
create_dir(struct archive_write_disk *a, char *path)
|
|
{
|
|
struct stat st;
|
|
struct fixup_entry *le;
|
|
char *slash, *base;
|
|
mode_t mode_final, mode;
|
|
int r;
|
|
|
|
/* Check for special names and just skip them. */
|
|
slash = strrchr(path, '/');
|
|
if (slash == NULL)
|
|
base = path;
|
|
else
|
|
base = slash + 1;
|
|
|
|
if (base[0] == '\0' ||
|
|
(base[0] == '.' && base[1] == '\0') ||
|
|
(base[0] == '.' && base[1] == '.' && base[2] == '\0')) {
|
|
/* Don't bother trying to create null path, '.', or '..'. */
|
|
if (slash != NULL) {
|
|
*slash = '\0';
|
|
r = create_dir(a, path);
|
|
*slash = '/';
|
|
return (r);
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* Yes, this should be stat() and not lstat(). Using lstat()
|
|
* here loses the ability to extract through symlinks. Also note
|
|
* that this should not use the a->st cache.
|
|
*/
|
|
if (stat(path, &st) == 0) {
|
|
if (S_ISDIR(st.st_mode))
|
|
return (ARCHIVE_OK);
|
|
if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
|
|
archive_set_error(&a->archive, EEXIST,
|
|
"Can't create directory '%s'", path);
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
if (unlink(path) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't create directory '%s': "
|
|
"Conflicting file cannot be removed",
|
|
path);
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
} else if (errno != ENOENT && errno != ENOTDIR) {
|
|
/* Stat failed? */
|
|
archive_set_error(&a->archive, errno, "Can't test directory '%s'", path);
|
|
return (ARCHIVE_FAILED);
|
|
} else if (slash != NULL) {
|
|
*slash = '\0';
|
|
r = create_dir(a, path);
|
|
*slash = '/';
|
|
if (r != ARCHIVE_OK)
|
|
return (r);
|
|
}
|
|
|
|
/*
|
|
* Mode we want for the final restored directory. Per POSIX,
|
|
* implicitly-created dirs must be created obeying the umask.
|
|
* There's no mention whether this is different for privileged
|
|
* restores (which the rest of this code handles by pretending
|
|
* umask=0). I've chosen here to always obey the user's umask for
|
|
* implicit dirs, even if _EXTRACT_PERM was specified.
|
|
*/
|
|
mode_final = DEFAULT_DIR_MODE & ~a->user_umask;
|
|
/* Mode we want on disk during the restore process. */
|
|
mode = mode_final;
|
|
mode |= MINIMUM_DIR_MODE;
|
|
mode &= MAXIMUM_DIR_MODE;
|
|
if (mkdir(path, mode) == 0) {
|
|
if (mode != mode_final) {
|
|
le = new_fixup(a, path);
|
|
if (le == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
le->fixup |=TODO_MODE_BASE;
|
|
le->mode = mode_final;
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* Without the following check, a/b/../b/c/d fails at the
|
|
* second visit to 'b', so 'd' can't be created. Note that we
|
|
* don't add it to the fixup list here, as it's already been
|
|
* added.
|
|
*/
|
|
if (stat(path, &st) == 0 && S_ISDIR(st.st_mode))
|
|
return (ARCHIVE_OK);
|
|
|
|
archive_set_error(&a->archive, errno, "Failed to create dir '%s'",
|
|
path);
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
/*
|
|
* Note: Although we can skip setting the user id if the desired user
|
|
* id matches the current user, we cannot skip setting the group, as
|
|
* many systems set the gid based on the containing directory. So
|
|
* we have to perform a chown syscall if we want to set the SGID
|
|
* bit. (The alternative is to stat() and then possibly chown(); it's
|
|
* more efficient to skip the stat() and just always chown().) Note
|
|
* that a successful chown() here clears the TODO_SGID_CHECK bit, which
|
|
* allows set_mode to skip the stat() check for the GID.
|
|
*/
|
|
static int
|
|
set_ownership(struct archive_write_disk *a)
|
|
{
|
|
#ifndef __CYGWIN__
|
|
/* unfortunately, on win32 there is no 'root' user with uid 0,
|
|
so we just have to try the chown and see if it works */
|
|
|
|
/* If we know we can't change it, don't bother trying. */
|
|
if (a->user_uid != 0 && a->user_uid != a->uid) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't set UID=%jd", (intmax_t)a->uid);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_FCHOWN
|
|
/* If we have an fd, we can avoid a race. */
|
|
if (a->fd >= 0 && fchown(a->fd, a->uid, a->gid) == 0) {
|
|
/* We've set owner and know uid/gid are correct. */
|
|
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#endif
|
|
|
|
/* We prefer lchown() but will use chown() if that's all we have. */
|
|
/* Of course, if we have neither, this will always fail. */
|
|
#ifdef HAVE_LCHOWN
|
|
if (lchown(a->name, a->uid, a->gid) == 0) {
|
|
/* We've set owner and know uid/gid are correct. */
|
|
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#elif HAVE_CHOWN
|
|
if (!S_ISLNK(a->mode) && chown(a->name, a->uid, a->gid) == 0) {
|
|
/* We've set owner and know uid/gid are correct. */
|
|
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#endif
|
|
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't set user=%jd/group=%jd for %s",
|
|
(intmax_t)a->uid, (intmax_t)a->gid, a->name);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
/*
|
|
* Note: Returns 0 on success, non-zero on failure.
|
|
*/
|
|
static int
|
|
set_time(int fd, int mode, const char *name,
|
|
time_t atime, long atime_nsec,
|
|
time_t mtime, long mtime_nsec)
|
|
{
|
|
/* Select the best implementation for this platform. */
|
|
#if defined(HAVE_UTIMENSAT) && defined(HAVE_FUTIMENS)
|
|
/*
|
|
* utimensat() and futimens() are defined in
|
|
* POSIX.1-2008. They support ns resolution and setting times
|
|
* on fds and symlinks.
|
|
*/
|
|
struct timespec ts[2];
|
|
(void)mode; /* UNUSED */
|
|
ts[0].tv_sec = atime;
|
|
ts[0].tv_nsec = atime_nsec;
|
|
ts[1].tv_sec = mtime;
|
|
ts[1].tv_nsec = mtime_nsec;
|
|
if (fd >= 0)
|
|
return futimens(fd, ts);
|
|
return utimensat(AT_FDCWD, name, ts, AT_SYMLINK_NOFOLLOW);
|
|
|
|
#elif HAVE_UTIMES
|
|
/*
|
|
* The utimes()-family functions support µs-resolution and
|
|
* setting times fds and symlinks. utimes() is documented as
|
|
* LEGACY by POSIX, futimes() and lutimes() are not described
|
|
* in POSIX.
|
|
*/
|
|
struct timeval times[2];
|
|
|
|
times[0].tv_sec = atime;
|
|
times[0].tv_usec = atime_nsec / 1000;
|
|
times[1].tv_sec = mtime;
|
|
times[1].tv_usec = mtime_nsec / 1000;
|
|
|
|
#ifdef HAVE_FUTIMES
|
|
if (fd >= 0)
|
|
return (futimes(fd, times));
|
|
#else
|
|
(void)fd; /* UNUSED */
|
|
#endif
|
|
#ifdef HAVE_LUTIMES
|
|
(void)mode; /* UNUSED */
|
|
return (lutimes(name, times));
|
|
#else
|
|
if (S_ISLNK(mode))
|
|
return (0);
|
|
return (utimes(name, times));
|
|
#endif
|
|
|
|
#elif defined(HAVE_UTIME)
|
|
/*
|
|
* utime() is POSIX-standard but only supports 1s resolution and
|
|
* does not support fds or symlinks.
|
|
*/
|
|
struct utimbuf times;
|
|
(void)fd; /* UNUSED */
|
|
(void)name; /* UNUSED */
|
|
(void)atime_nsec; /* UNUSED */
|
|
(void)mtime_nsec; /* UNUSED */
|
|
times.actime = atime;
|
|
times.modtime = mtime;
|
|
if (S_ISLNK(mode))
|
|
return (ARCHIVE_OK);
|
|
return (utime(name, ×));
|
|
|
|
#else
|
|
/*
|
|
* We don't know how to set the time on this platform.
|
|
*/
|
|
(void)fd; /* UNUSED */
|
|
(void)mode; /* UNUSED */
|
|
(void)name; /* UNUSED */
|
|
(void)atime_nsec; /* UNUSED */
|
|
(void)mtime_nsec; /* UNUSED */
|
|
return (ARCHIVE_WARN);
|
|
#endif
|
|
}
|
|
|
|
#ifdef F_SETTIMES
|
|
static int
|
|
set_time_tru64(int fd, int mode, const char *name,
|
|
time_t atime, long atime_nsec,
|
|
time_t mtime, long mtime_nsec,
|
|
time_t ctime, long ctime_nsec)
|
|
{
|
|
struct attr_timbuf tstamp;
|
|
tstamp.atime.tv_sec = atime;
|
|
tstamp.mtime.tv_sec = mtime;
|
|
tstamp.ctime.tv_sec = ctime;
|
|
#if defined (__hpux) && defined (__ia64)
|
|
tstamp.atime.tv_nsec = atime_nsec;
|
|
tstamp.mtime.tv_nsec = mtime_nsec;
|
|
tstamp.ctime.tv_nsec = ctime_nsec;
|
|
#else
|
|
tstamp.atime.tv_usec = atime_nsec / 1000;
|
|
tstamp.mtime.tv_usec = mtime_nsec / 1000;
|
|
tstamp.ctime.tv_usec = ctime_nsec / 1000;
|
|
#endif
|
|
return (fcntl(fd,F_SETTIMES,&tstamp));
|
|
}
|
|
#endif /* F_SETTIMES */
|
|
|
|
static int
|
|
set_times(struct archive_write_disk *a,
|
|
int fd, int mode, const char *name,
|
|
time_t atime, long atime_nanos,
|
|
time_t birthtime, long birthtime_nanos,
|
|
time_t mtime, long mtime_nanos,
|
|
time_t cctime, long ctime_nanos)
|
|
{
|
|
/* Note: set_time doesn't use libarchive return conventions!
|
|
* It uses syscall conventions. So 0 here instead of ARCHIVE_OK. */
|
|
int r1 = 0, r2 = 0;
|
|
|
|
#ifdef F_SETTIMES
|
|
/*
|
|
* on Tru64 try own fcntl first which can restore even the
|
|
* ctime, fall back to default code path below if it fails
|
|
* or if we are not running as root
|
|
*/
|
|
if (a->user_uid == 0 &&
|
|
set_time_tru64(fd, mode, name,
|
|
atime, atime_nanos, mtime,
|
|
mtime_nanos, cctime, ctime_nanos) == 0) {
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#else /* Tru64 */
|
|
(void)cctime; /* UNUSED */
|
|
(void)ctime_nanos; /* UNUSED */
|
|
#endif /* Tru64 */
|
|
|
|
#ifdef HAVE_STRUCT_STAT_ST_BIRTHTIME
|
|
/*
|
|
* If you have struct stat.st_birthtime, we assume BSD
|
|
* birthtime semantics, in which {f,l,}utimes() updates
|
|
* birthtime to earliest mtime. So we set the time twice,
|
|
* first using the birthtime, then using the mtime. If
|
|
* birthtime == mtime, this isn't necessary, so we skip it.
|
|
* If birthtime > mtime, then this won't work, so we skip it.
|
|
*/
|
|
if (birthtime < mtime
|
|
|| (birthtime == mtime && birthtime_nanos < mtime_nanos))
|
|
r1 = set_time(fd, mode, name,
|
|
atime, atime_nanos,
|
|
birthtime, birthtime_nanos);
|
|
#else
|
|
(void)birthtime; /* UNUSED */
|
|
(void)birthtime_nanos; /* UNUSED */
|
|
#endif
|
|
r2 = set_time(fd, mode, name,
|
|
atime, atime_nanos,
|
|
mtime, mtime_nanos);
|
|
if (r1 != 0 || r2 != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't restore time");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
set_times_from_entry(struct archive_write_disk *a)
|
|
{
|
|
time_t atime, birthtime, mtime, cctime;
|
|
long atime_nsec, birthtime_nsec, mtime_nsec, ctime_nsec;
|
|
|
|
/* Suitable defaults. */
|
|
atime = birthtime = mtime = cctime = a->start_time;
|
|
atime_nsec = birthtime_nsec = mtime_nsec = ctime_nsec = 0;
|
|
|
|
/* If no time was provided, we're done. */
|
|
if (!archive_entry_atime_is_set(a->entry)
|
|
#if HAVE_STRUCT_STAT_ST_BIRTHTIME
|
|
&& !archive_entry_birthtime_is_set(a->entry)
|
|
#endif
|
|
&& !archive_entry_mtime_is_set(a->entry))
|
|
return (ARCHIVE_OK);
|
|
|
|
if (archive_entry_atime_is_set(a->entry)) {
|
|
atime = archive_entry_atime(a->entry);
|
|
atime_nsec = archive_entry_atime_nsec(a->entry);
|
|
}
|
|
if (archive_entry_birthtime_is_set(a->entry)) {
|
|
birthtime = archive_entry_birthtime(a->entry);
|
|
birthtime_nsec = archive_entry_birthtime_nsec(a->entry);
|
|
}
|
|
if (archive_entry_mtime_is_set(a->entry)) {
|
|
mtime = archive_entry_mtime(a->entry);
|
|
mtime_nsec = archive_entry_mtime_nsec(a->entry);
|
|
}
|
|
if (archive_entry_ctime_is_set(a->entry)) {
|
|
cctime = archive_entry_ctime(a->entry);
|
|
ctime_nsec = archive_entry_ctime_nsec(a->entry);
|
|
}
|
|
|
|
return set_times(a, a->fd, a->mode, a->name,
|
|
atime, atime_nsec,
|
|
birthtime, birthtime_nsec,
|
|
mtime, mtime_nsec,
|
|
cctime, ctime_nsec);
|
|
}
|
|
|
|
static int
|
|
set_mode(struct archive_write_disk *a, int mode)
|
|
{
|
|
int r = ARCHIVE_OK;
|
|
mode &= 07777; /* Strip off file type bits. */
|
|
|
|
if (a->todo & TODO_SGID_CHECK) {
|
|
/*
|
|
* If we don't know the GID is right, we must stat()
|
|
* to verify it. We can't just check the GID of this
|
|
* process, since systems sometimes set GID from
|
|
* the enclosing dir or based on ACLs.
|
|
*/
|
|
if ((r = lazy_stat(a)) != ARCHIVE_OK)
|
|
return (r);
|
|
if (a->pst->st_gid != a->gid) {
|
|
mode &= ~ S_ISGID;
|
|
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
|
|
/*
|
|
* This is only an error if you
|
|
* requested owner restore. If you
|
|
* didn't, we'll try to restore
|
|
* sgid/suid, but won't consider it a
|
|
* problem if we can't.
|
|
*/
|
|
archive_set_error(&a->archive, -1,
|
|
"Can't restore SGID bit");
|
|
r = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
/* While we're here, double-check the UID. */
|
|
if (a->pst->st_uid != a->uid
|
|
&& (a->todo & TODO_SUID)) {
|
|
mode &= ~ S_ISUID;
|
|
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
|
|
archive_set_error(&a->archive, -1,
|
|
"Can't restore SUID bit");
|
|
r = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
a->todo &= ~TODO_SGID_CHECK;
|
|
a->todo &= ~TODO_SUID_CHECK;
|
|
} else if (a->todo & TODO_SUID_CHECK) {
|
|
/*
|
|
* If we don't know the UID is right, we can just check
|
|
* the user, since all systems set the file UID from
|
|
* the process UID.
|
|
*/
|
|
if (a->user_uid != a->uid) {
|
|
mode &= ~ S_ISUID;
|
|
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
|
|
archive_set_error(&a->archive, -1,
|
|
"Can't make file SUID");
|
|
r = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
a->todo &= ~TODO_SUID_CHECK;
|
|
}
|
|
|
|
if (S_ISLNK(a->mode)) {
|
|
#ifdef HAVE_LCHMOD
|
|
/*
|
|
* If this is a symlink, use lchmod(). If the
|
|
* platform doesn't support lchmod(), just skip it. A
|
|
* platform that doesn't provide a way to set
|
|
* permissions on symlinks probably ignores
|
|
* permissions on symlinks, so a failure here has no
|
|
* impact.
|
|
*/
|
|
if (lchmod(a->name, mode) != 0) {
|
|
switch (errno) {
|
|
case ENOTSUP:
|
|
case ENOSYS:
|
|
#if ENOTSUP != EOPNOTSUPP
|
|
case EOPNOTSUPP:
|
|
#endif
|
|
/*
|
|
* if lchmod is defined but the platform
|
|
* doesn't support it, silently ignore
|
|
* error
|
|
*/
|
|
break;
|
|
default:
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't set permissions to 0%o", (int)mode);
|
|
r = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
#endif
|
|
} else if (!S_ISDIR(a->mode)) {
|
|
/*
|
|
* If it's not a symlink and not a dir, then use
|
|
* fchmod() or chmod(), depending on whether we have
|
|
* an fd. Dirs get their perms set during the
|
|
* post-extract fixup, which is handled elsewhere.
|
|
*/
|
|
#ifdef HAVE_FCHMOD
|
|
if (a->fd >= 0) {
|
|
if (fchmod(a->fd, mode) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't set permissions to 0%o", (int)mode);
|
|
r = ARCHIVE_WARN;
|
|
}
|
|
} else
|
|
#endif
|
|
/* If this platform lacks fchmod(), then
|
|
* we'll just use chmod(). */
|
|
if (chmod(a->name, mode) != 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't set permissions to 0%o", (int)mode);
|
|
r = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
return (r);
|
|
}
|
|
|
|
static int
|
|
set_fflags(struct archive_write_disk *a)
|
|
{
|
|
struct fixup_entry *le;
|
|
unsigned long set, clear;
|
|
int r;
|
|
int critical_flags;
|
|
mode_t mode = archive_entry_mode(a->entry);
|
|
|
|
/*
|
|
* Make 'critical_flags' hold all file flags that can't be
|
|
* immediately restored. For example, on BSD systems,
|
|
* SF_IMMUTABLE prevents hardlinks from being created, so
|
|
* should not be set until after any hardlinks are created. To
|
|
* preserve some semblance of portability, this uses #ifdef
|
|
* extensively. Ugly, but it works.
|
|
*
|
|
* Yes, Virginia, this does create a security race. It's mitigated
|
|
* somewhat by the practice of creating dirs 0700 until the extract
|
|
* is done, but it would be nice if we could do more than that.
|
|
* People restoring critical file systems should be wary of
|
|
* other programs that might try to muck with files as they're
|
|
* being restored.
|
|
*/
|
|
/* Hopefully, the compiler will optimize this mess into a constant. */
|
|
critical_flags = 0;
|
|
#ifdef SF_IMMUTABLE
|
|
critical_flags |= SF_IMMUTABLE;
|
|
#endif
|
|
#ifdef UF_IMMUTABLE
|
|
critical_flags |= UF_IMMUTABLE;
|
|
#endif
|
|
#ifdef SF_APPEND
|
|
critical_flags |= SF_APPEND;
|
|
#endif
|
|
#ifdef UF_APPEND
|
|
critical_flags |= UF_APPEND;
|
|
#endif
|
|
#ifdef EXT2_APPEND_FL
|
|
critical_flags |= EXT2_APPEND_FL;
|
|
#endif
|
|
#ifdef EXT2_IMMUTABLE_FL
|
|
critical_flags |= EXT2_IMMUTABLE_FL;
|
|
#endif
|
|
|
|
if (a->todo & TODO_FFLAGS) {
|
|
archive_entry_fflags(a->entry, &set, &clear);
|
|
|
|
/*
|
|
* The first test encourages the compiler to eliminate
|
|
* all of this if it's not necessary.
|
|
*/
|
|
if ((critical_flags != 0) && (set & critical_flags)) {
|
|
le = current_fixup(a, a->name);
|
|
if (le == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
le->fixup |= TODO_FFLAGS;
|
|
le->fflags_set = set;
|
|
/* Store the mode if it's not already there. */
|
|
if ((le->fixup & TODO_MODE) == 0)
|
|
le->mode = mode;
|
|
} else {
|
|
r = set_fflags_platform(a, a->fd,
|
|
a->name, mode, set, clear);
|
|
if (r != ARCHIVE_OK)
|
|
return (r);
|
|
}
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
clear_nochange_fflags(struct archive_write_disk *a)
|
|
{
|
|
int nochange_flags;
|
|
mode_t mode = archive_entry_mode(a->entry);
|
|
|
|
/* Hopefully, the compiler will optimize this mess into a constant. */
|
|
nochange_flags = 0;
|
|
#ifdef SF_IMMUTABLE
|
|
nochange_flags |= SF_IMMUTABLE;
|
|
#endif
|
|
#ifdef UF_IMMUTABLE
|
|
nochange_flags |= UF_IMMUTABLE;
|
|
#endif
|
|
#ifdef SF_APPEND
|
|
nochange_flags |= SF_APPEND;
|
|
#endif
|
|
#ifdef UF_APPEND
|
|
nochange_flags |= UF_APPEND;
|
|
#endif
|
|
#ifdef EXT2_APPEND_FL
|
|
nochange_flags |= EXT2_APPEND_FL;
|
|
#endif
|
|
#ifdef EXT2_IMMUTABLE_FL
|
|
nochange_flags |= EXT2_IMMUTABLE_FL;
|
|
#endif
|
|
|
|
return (set_fflags_platform(a, a->fd, a->name, mode, 0, nochange_flags));
|
|
}
|
|
|
|
|
|
#if ( defined(HAVE_LCHFLAGS) || defined(HAVE_CHFLAGS) || defined(HAVE_FCHFLAGS) ) && defined(HAVE_STRUCT_STAT_ST_FLAGS)
|
|
/*
|
|
* BSD reads flags using stat() and sets them with one of {f,l,}chflags()
|
|
*/
|
|
static int
|
|
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
|
|
mode_t mode, unsigned long set, unsigned long clear)
|
|
{
|
|
int r;
|
|
|
|
(void)mode; /* UNUSED */
|
|
if (set == 0 && clear == 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
/*
|
|
* XXX Is the stat here really necessary? Or can I just use
|
|
* the 'set' flags directly? In particular, I'm not sure
|
|
* about the correct approach if we're overwriting an existing
|
|
* file that already has flags on it. XXX
|
|
*/
|
|
if ((r = lazy_stat(a)) != ARCHIVE_OK)
|
|
return (r);
|
|
|
|
a->st.st_flags &= ~clear;
|
|
a->st.st_flags |= set;
|
|
#ifdef HAVE_FCHFLAGS
|
|
/* If platform has fchflags() and we were given an fd, use it. */
|
|
if (fd >= 0 && fchflags(fd, a->st.st_flags) == 0)
|
|
return (ARCHIVE_OK);
|
|
#endif
|
|
/*
|
|
* If we can't use the fd to set the flags, we'll use the
|
|
* pathname to set flags. We prefer lchflags() but will use
|
|
* chflags() if we must.
|
|
*/
|
|
#ifdef HAVE_LCHFLAGS
|
|
if (lchflags(name, a->st.st_flags) == 0)
|
|
return (ARCHIVE_OK);
|
|
#elif defined(HAVE_CHFLAGS)
|
|
if (S_ISLNK(a->st.st_mode)) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't set file flags on symlink.");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
if (chflags(name, a->st.st_flags) == 0)
|
|
return (ARCHIVE_OK);
|
|
#endif
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to set file flags");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
#elif defined(EXT2_IOC_GETFLAGS) && defined(EXT2_IOC_SETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS)
|
|
/*
|
|
* Linux uses ioctl() to read and write file flags.
|
|
*/
|
|
static int
|
|
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
|
|
mode_t mode, unsigned long set, unsigned long clear)
|
|
{
|
|
int ret;
|
|
int myfd = fd;
|
|
int newflags, oldflags;
|
|
int sf_mask = 0;
|
|
|
|
if (set == 0 && clear == 0)
|
|
return (ARCHIVE_OK);
|
|
/* Only regular files and dirs can have flags. */
|
|
if (!S_ISREG(mode) && !S_ISDIR(mode))
|
|
return (ARCHIVE_OK);
|
|
|
|
/* If we weren't given an fd, open it ourselves. */
|
|
if (myfd < 0) {
|
|
myfd = open(name, O_RDONLY | O_NONBLOCK | O_BINARY | O_CLOEXEC);
|
|
__archive_ensure_cloexec_flag(myfd);
|
|
}
|
|
if (myfd < 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
/*
|
|
* Linux has no define for the flags that are only settable by
|
|
* the root user. This code may seem a little complex, but
|
|
* there seem to be some Linux systems that lack these
|
|
* defines. (?) The code below degrades reasonably gracefully
|
|
* if sf_mask is incomplete.
|
|
*/
|
|
#ifdef EXT2_IMMUTABLE_FL
|
|
sf_mask |= EXT2_IMMUTABLE_FL;
|
|
#endif
|
|
#ifdef EXT2_APPEND_FL
|
|
sf_mask |= EXT2_APPEND_FL;
|
|
#endif
|
|
/*
|
|
* XXX As above, this would be way simpler if we didn't have
|
|
* to read the current flags from disk. XXX
|
|
*/
|
|
ret = ARCHIVE_OK;
|
|
|
|
/* Read the current file flags. */
|
|
if (ioctl(myfd, EXT2_IOC_GETFLAGS, &oldflags) < 0)
|
|
goto fail;
|
|
|
|
/* Try setting the flags as given. */
|
|
newflags = (oldflags & ~clear) | set;
|
|
if (ioctl(myfd, EXT2_IOC_SETFLAGS, &newflags) >= 0)
|
|
goto cleanup;
|
|
if (errno != EPERM)
|
|
goto fail;
|
|
|
|
/* If we couldn't set all the flags, try again with a subset. */
|
|
newflags &= ~sf_mask;
|
|
oldflags &= sf_mask;
|
|
newflags |= oldflags;
|
|
if (ioctl(myfd, EXT2_IOC_SETFLAGS, &newflags) >= 0)
|
|
goto cleanup;
|
|
|
|
/* We couldn't set the flags, so report the failure. */
|
|
fail:
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to set file flags");
|
|
ret = ARCHIVE_WARN;
|
|
cleanup:
|
|
if (fd < 0)
|
|
close(myfd);
|
|
return (ret);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* Of course, some systems have neither BSD chflags() nor Linux' flags
|
|
* support through ioctl().
|
|
*/
|
|
static int
|
|
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
|
|
mode_t mode, unsigned long set, unsigned long clear)
|
|
{
|
|
(void)a; /* UNUSED */
|
|
(void)fd; /* UNUSED */
|
|
(void)name; /* UNUSED */
|
|
(void)mode; /* UNUSED */
|
|
(void)set; /* UNUSED */
|
|
(void)clear; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
#endif /* __linux */
|
|
|
|
#ifndef HAVE_COPYFILE_H
|
|
/* Default is to simply drop Mac extended metadata. */
|
|
static int
|
|
set_mac_metadata(struct archive_write_disk *a, const char *pathname,
|
|
const void *metadata, size_t metadata_size)
|
|
{
|
|
(void)a; /* UNUSED */
|
|
(void)pathname; /* UNUSED */
|
|
(void)metadata; /* UNUSED */
|
|
(void)metadata_size; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
fixup_appledouble(struct archive_write_disk *a, const char *pathname)
|
|
{
|
|
(void)a; /* UNUSED */
|
|
(void)pathname; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#else
|
|
|
|
/*
|
|
* On Mac OS, we use copyfile() to unpack the metadata and
|
|
* apply it to the target file.
|
|
*/
|
|
|
|
#if defined(HAVE_SYS_XATTR_H)
|
|
static int
|
|
copy_xattrs(struct archive_write_disk *a, int tmpfd, int dffd)
|
|
{
|
|
ssize_t xattr_size;
|
|
char *xattr_names = NULL, *xattr_val = NULL;
|
|
int ret = ARCHIVE_OK, xattr_i;
|
|
|
|
xattr_size = flistxattr(tmpfd, NULL, 0, 0);
|
|
if (xattr_size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to read metadata(xattr)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_xattr;
|
|
}
|
|
xattr_names = malloc(xattr_size);
|
|
if (xattr_names == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for metadata(xattr)");
|
|
ret = ARCHIVE_FATAL;
|
|
goto exit_xattr;
|
|
}
|
|
xattr_size = flistxattr(tmpfd, xattr_names, xattr_size, 0);
|
|
if (xattr_size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to read metadata(xattr)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_xattr;
|
|
}
|
|
for (xattr_i = 0; xattr_i < xattr_size;
|
|
xattr_i += strlen(xattr_names + xattr_i) + 1) {
|
|
char *xattr_val_saved;
|
|
ssize_t s;
|
|
int f;
|
|
|
|
s = fgetxattr(tmpfd, xattr_names + xattr_i, NULL, 0, 0, 0);
|
|
if (s == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to get metadata(xattr)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_xattr;
|
|
}
|
|
xattr_val_saved = xattr_val;
|
|
xattr_val = realloc(xattr_val, s);
|
|
if (xattr_val == NULL) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Failed to get metadata(xattr)");
|
|
ret = ARCHIVE_WARN;
|
|
free(xattr_val_saved);
|
|
goto exit_xattr;
|
|
}
|
|
s = fgetxattr(tmpfd, xattr_names + xattr_i, xattr_val, s, 0, 0);
|
|
if (s == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to get metadata(xattr)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_xattr;
|
|
}
|
|
f = fsetxattr(dffd, xattr_names + xattr_i, xattr_val, s, 0, 0);
|
|
if (f == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to get metadata(xattr)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_xattr;
|
|
}
|
|
}
|
|
exit_xattr:
|
|
free(xattr_names);
|
|
free(xattr_val);
|
|
return (ret);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
copy_acls(struct archive_write_disk *a, int tmpfd, int dffd)
|
|
{
|
|
acl_t acl, dfacl = NULL;
|
|
int acl_r, ret = ARCHIVE_OK;
|
|
|
|
acl = acl_get_fd(tmpfd);
|
|
if (acl == NULL) {
|
|
if (errno == ENOENT)
|
|
/* There are not any ACLs. */
|
|
return (ret);
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to get metadata(acl)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_acl;
|
|
}
|
|
dfacl = acl_dup(acl);
|
|
acl_r = acl_set_fd(dffd, dfacl);
|
|
if (acl_r == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to get metadata(acl)");
|
|
ret = ARCHIVE_WARN;
|
|
goto exit_acl;
|
|
}
|
|
exit_acl:
|
|
if (acl)
|
|
acl_free(acl);
|
|
if (dfacl)
|
|
acl_free(dfacl);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
create_tempdatafork(struct archive_write_disk *a, const char *pathname)
|
|
{
|
|
struct archive_string tmpdatafork;
|
|
int tmpfd;
|
|
|
|
archive_string_init(&tmpdatafork);
|
|
archive_strcpy(&tmpdatafork, "tar.md.XXXXXX");
|
|
tmpfd = mkstemp(tmpdatafork.s);
|
|
if (tmpfd < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to mkstemp");
|
|
archive_string_free(&tmpdatafork);
|
|
return (-1);
|
|
}
|
|
if (copyfile(pathname, tmpdatafork.s, 0,
|
|
COPYFILE_UNPACK | COPYFILE_NOFOLLOW
|
|
| COPYFILE_ACL | COPYFILE_XATTR) < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to restore metadata");
|
|
close(tmpfd);
|
|
tmpfd = -1;
|
|
}
|
|
unlink(tmpdatafork.s);
|
|
archive_string_free(&tmpdatafork);
|
|
return (tmpfd);
|
|
}
|
|
|
|
static int
|
|
copy_metadata(struct archive_write_disk *a, const char *metadata,
|
|
const char *datafork, int datafork_compressed)
|
|
{
|
|
int ret = ARCHIVE_OK;
|
|
|
|
if (datafork_compressed) {
|
|
int dffd, tmpfd;
|
|
|
|
tmpfd = create_tempdatafork(a, metadata);
|
|
if (tmpfd == -1)
|
|
return (ARCHIVE_WARN);
|
|
|
|
/*
|
|
* Do not open the data fork compressed by HFS+ compression
|
|
* with at least a writing mode(O_RDWR or O_WRONLY). it
|
|
* makes the data fork uncompressed.
|
|
*/
|
|
dffd = open(datafork, 0);
|
|
if (dffd == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to open the data fork for metadata");
|
|
close(tmpfd);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
#if defined(HAVE_SYS_XATTR_H)
|
|
ret = copy_xattrs(a, tmpfd, dffd);
|
|
if (ret == ARCHIVE_OK)
|
|
#endif
|
|
ret = copy_acls(a, tmpfd, dffd);
|
|
close(tmpfd);
|
|
close(dffd);
|
|
} else {
|
|
if (copyfile(metadata, datafork, 0,
|
|
COPYFILE_UNPACK | COPYFILE_NOFOLLOW
|
|
| COPYFILE_ACL | COPYFILE_XATTR) < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to restore metadata");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
set_mac_metadata(struct archive_write_disk *a, const char *pathname,
|
|
const void *metadata, size_t metadata_size)
|
|
{
|
|
struct archive_string tmp;
|
|
ssize_t written;
|
|
int fd;
|
|
int ret = ARCHIVE_OK;
|
|
|
|
/* This would be simpler if copyfile() could just accept the
|
|
* metadata as a block of memory; then we could sidestep this
|
|
* silly dance of writing the data to disk just so that
|
|
* copyfile() can read it back in again. */
|
|
archive_string_init(&tmp);
|
|
archive_strcpy(&tmp, pathname);
|
|
archive_strcat(&tmp, ".XXXXXX");
|
|
fd = mkstemp(tmp.s);
|
|
|
|
if (fd < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to restore metadata");
|
|
archive_string_free(&tmp);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
written = write(fd, metadata, metadata_size);
|
|
close(fd);
|
|
if ((size_t)written != metadata_size) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to restore metadata");
|
|
ret = ARCHIVE_WARN;
|
|
} else {
|
|
int compressed;
|
|
|
|
#if defined(UF_COMPRESSED)
|
|
if ((a->todo & TODO_HFS_COMPRESSION) != 0 &&
|
|
(ret = lazy_stat(a)) == ARCHIVE_OK)
|
|
compressed = a->st.st_flags & UF_COMPRESSED;
|
|
else
|
|
#endif
|
|
compressed = 0;
|
|
ret = copy_metadata(a, tmp.s, pathname, compressed);
|
|
}
|
|
unlink(tmp.s);
|
|
archive_string_free(&tmp);
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
fixup_appledouble(struct archive_write_disk *a, const char *pathname)
|
|
{
|
|
char buff[8];
|
|
struct stat st;
|
|
const char *p;
|
|
struct archive_string datafork;
|
|
int fd = -1, ret = ARCHIVE_OK;
|
|
|
|
archive_string_init(&datafork);
|
|
/* Check if the current file name is a type of the resource
|
|
* fork file. */
|
|
p = strrchr(pathname, '/');
|
|
if (p == NULL)
|
|
p = pathname;
|
|
else
|
|
p++;
|
|
if (p[0] != '.' || p[1] != '_')
|
|
goto skip_appledouble;
|
|
|
|
/*
|
|
* Check if the data fork file exists.
|
|
*
|
|
* TODO: Check if this write disk object has handled it.
|
|
*/
|
|
archive_strncpy(&datafork, pathname, p - pathname);
|
|
archive_strcat(&datafork, p + 2);
|
|
if (lstat(datafork.s, &st) == -1 ||
|
|
(st.st_mode & AE_IFMT) != AE_IFREG)
|
|
goto skip_appledouble;
|
|
|
|
/*
|
|
* Check if the file is in the AppleDouble form.
|
|
*/
|
|
fd = open(pathname, O_RDONLY | O_BINARY | O_CLOEXEC);
|
|
__archive_ensure_cloexec_flag(fd);
|
|
if (fd == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to open a restoring file");
|
|
ret = ARCHIVE_WARN;
|
|
goto skip_appledouble;
|
|
}
|
|
if (read(fd, buff, 8) == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to read a restoring file");
|
|
close(fd);
|
|
ret = ARCHIVE_WARN;
|
|
goto skip_appledouble;
|
|
}
|
|
close(fd);
|
|
/* Check AppleDouble Magic Code. */
|
|
if (archive_be32dec(buff) != 0x00051607)
|
|
goto skip_appledouble;
|
|
/* Check AppleDouble Version. */
|
|
if (archive_be32dec(buff+4) != 0x00020000)
|
|
goto skip_appledouble;
|
|
|
|
ret = copy_metadata(a, pathname, datafork.s,
|
|
#if defined(UF_COMPRESSED)
|
|
st.st_flags & UF_COMPRESSED);
|
|
#else
|
|
0);
|
|
#endif
|
|
if (ret == ARCHIVE_OK) {
|
|
unlink(pathname);
|
|
ret = ARCHIVE_EOF;
|
|
}
|
|
skip_appledouble:
|
|
archive_string_free(&datafork);
|
|
return (ret);
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_LSETXATTR || HAVE_LSETEA
|
|
/*
|
|
* Restore extended attributes - Linux and AIX implementations:
|
|
* AIX' ea interface is syntaxwise identical to the Linux xattr interface.
|
|
*/
|
|
static int
|
|
set_xattrs(struct archive_write_disk *a)
|
|
{
|
|
struct archive_entry *entry = a->entry;
|
|
static int warning_done = 0;
|
|
int ret = ARCHIVE_OK;
|
|
int i = archive_entry_xattr_reset(entry);
|
|
|
|
while (i--) {
|
|
const char *name;
|
|
const void *value;
|
|
size_t size;
|
|
archive_entry_xattr_next(entry, &name, &value, &size);
|
|
if (name != NULL &&
|
|
strncmp(name, "xfsroot.", 8) != 0 &&
|
|
strncmp(name, "system.", 7) != 0) {
|
|
int e;
|
|
#if HAVE_FSETXATTR
|
|
if (a->fd >= 0)
|
|
e = fsetxattr(a->fd, name, value, size, 0);
|
|
else
|
|
#elif HAVE_FSETEA
|
|
if (a->fd >= 0)
|
|
e = fsetea(a->fd, name, value, size, 0);
|
|
else
|
|
#endif
|
|
{
|
|
#if HAVE_LSETXATTR
|
|
e = lsetxattr(archive_entry_pathname(entry),
|
|
name, value, size, 0);
|
|
#elif HAVE_LSETEA
|
|
e = lsetea(archive_entry_pathname(entry),
|
|
name, value, size, 0);
|
|
#endif
|
|
}
|
|
if (e == -1) {
|
|
if (errno == ENOTSUP || errno == ENOSYS) {
|
|
if (!warning_done) {
|
|
warning_done = 1;
|
|
archive_set_error(&a->archive, errno,
|
|
"Cannot restore extended "
|
|
"attributes on this file "
|
|
"system");
|
|
}
|
|
} else
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to set extended attribute");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
} else {
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Invalid extended attribute encountered");
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
#elif HAVE_EXTATTR_SET_FILE && HAVE_DECL_EXTATTR_NAMESPACE_USER
|
|
/*
|
|
* Restore extended attributes - FreeBSD implementation
|
|
*/
|
|
static int
|
|
set_xattrs(struct archive_write_disk *a)
|
|
{
|
|
struct archive_entry *entry = a->entry;
|
|
static int warning_done = 0;
|
|
int ret = ARCHIVE_OK;
|
|
int i = archive_entry_xattr_reset(entry);
|
|
|
|
while (i--) {
|
|
const char *name;
|
|
const void *value;
|
|
size_t size;
|
|
archive_entry_xattr_next(entry, &name, &value, &size);
|
|
if (name != NULL) {
|
|
int e;
|
|
int namespace;
|
|
|
|
if (strncmp(name, "user.", 5) == 0) {
|
|
/* "user." attributes go to user namespace */
|
|
name += 5;
|
|
namespace = EXTATTR_NAMESPACE_USER;
|
|
} else {
|
|
/* Warn about other extended attributes. */
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Can't restore extended attribute ``%s''",
|
|
name);
|
|
ret = ARCHIVE_WARN;
|
|
continue;
|
|
}
|
|
errno = 0;
|
|
#if HAVE_EXTATTR_SET_FD
|
|
if (a->fd >= 0)
|
|
e = extattr_set_fd(a->fd, namespace, name, value, size);
|
|
else
|
|
#endif
|
|
/* TODO: should we use extattr_set_link() instead? */
|
|
{
|
|
e = extattr_set_file(archive_entry_pathname(entry),
|
|
namespace, name, value, size);
|
|
}
|
|
if (e != (int)size) {
|
|
if (errno == ENOTSUP || errno == ENOSYS) {
|
|
if (!warning_done) {
|
|
warning_done = 1;
|
|
archive_set_error(&a->archive, errno,
|
|
"Cannot restore extended "
|
|
"attributes on this file "
|
|
"system");
|
|
}
|
|
} else {
|
|
archive_set_error(&a->archive, errno,
|
|
"Failed to set extended attribute");
|
|
}
|
|
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
#else
|
|
/*
|
|
* Restore extended attributes - stub implementation for unsupported systems
|
|
*/
|
|
static int
|
|
set_xattrs(struct archive_write_disk *a)
|
|
{
|
|
static int warning_done = 0;
|
|
|
|
/* If there aren't any extended attributes, then it's okay not
|
|
* to extract them, otherwise, issue a single warning. */
|
|
if (archive_entry_xattr_count(a->entry) != 0 && !warning_done) {
|
|
warning_done = 1;
|
|
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Cannot restore extended attributes on this system");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
/* Warning was already emitted; suppress further warnings. */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Test if file on disk is older than entry.
|
|
*/
|
|
static int
|
|
older(struct stat *st, struct archive_entry *entry)
|
|
{
|
|
/* First, test the seconds and return if we have a definite answer. */
|
|
/* Definitely older. */
|
|
if (st->st_mtime < archive_entry_mtime(entry))
|
|
return (1);
|
|
/* Definitely younger. */
|
|
if (st->st_mtime > archive_entry_mtime(entry))
|
|
return (0);
|
|
/* If this platform supports fractional seconds, try those. */
|
|
#if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
|
|
/* Definitely older. */
|
|
if (st->st_mtimespec.tv_nsec < archive_entry_mtime_nsec(entry))
|
|
return (1);
|
|
#elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
|
|
/* Definitely older. */
|
|
if (st->st_mtim.tv_nsec < archive_entry_mtime_nsec(entry))
|
|
return (1);
|
|
#elif HAVE_STRUCT_STAT_ST_MTIME_N
|
|
/* older. */
|
|
if (st->st_mtime_n < archive_entry_mtime_nsec(entry))
|
|
return (1);
|
|
#elif HAVE_STRUCT_STAT_ST_UMTIME
|
|
/* older. */
|
|
if (st->st_umtime * 1000 < archive_entry_mtime_nsec(entry))
|
|
return (1);
|
|
#elif HAVE_STRUCT_STAT_ST_MTIME_USEC
|
|
/* older. */
|
|
if (st->st_mtime_usec * 1000 < archive_entry_mtime_nsec(entry))
|
|
return (1);
|
|
#else
|
|
/* This system doesn't have high-res timestamps. */
|
|
#endif
|
|
/* Same age or newer, so not older. */
|
|
return (0);
|
|
}
|
|
|
|
#endif /* !_WIN32 || __CYGWIN__ */
|
|
|