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1042 lines
27 KiB
1042 lines
27 KiB
/*-
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* Copyright (c) 2003-2009 Tim Kientzle
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* Copyright (c) 2010-2012 Michihiro NAKAJIMA
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* Copyright (c) 2016 Martin Matuska
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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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* 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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/* This is the tree-walking code for POSIX systems. */
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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_EXTATTR_H
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#include <sys/extattr.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_PARAM_H
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#include <sys/param.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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#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_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_LIMITS_H
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#include <limits.h>
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#endif
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#ifdef HAVE_LINUX_TYPES_H
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#include <linux/types.h>
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#endif
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#ifdef HAVE_LINUX_FIEMAP_H
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#include <linux/fiemap.h>
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#endif
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#ifdef HAVE_LINUX_FS_H
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#include <linux/fs.h>
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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_PATHS_H
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#include <paths.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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#include "archive.h"
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#include "archive_entry.h"
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#include "archive_private.h"
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#include "archive_read_disk_private.h"
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#ifndef O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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static int setup_mac_metadata(struct archive_read_disk *,
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struct archive_entry *, int *fd);
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static int setup_xattrs(struct archive_read_disk *,
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struct archive_entry *, int *fd);
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static int setup_sparse(struct archive_read_disk *,
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struct archive_entry *, int *fd);
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#if defined(HAVE_LINUX_FIEMAP_H)
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static int setup_sparse_fiemap(struct archive_read_disk *,
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struct archive_entry *, int *fd);
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#endif
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#if !ARCHIVE_ACL_SUPPORT
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int
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archive_read_disk_entry_setup_acls(struct archive_read_disk *a,
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struct archive_entry *entry, int *fd)
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{
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(void)a; /* UNUSED */
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(void)entry; /* UNUSED */
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(void)fd; /* UNUSED */
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return (ARCHIVE_OK);
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}
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#endif
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/*
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* Enter working directory and return working pathname of archive_entry.
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* If a pointer to an integer is provided and its value is below zero
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* open a file descriptor on this pathname.
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*/
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const char *
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archive_read_disk_entry_setup_path(struct archive_read_disk *a,
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struct archive_entry *entry, int *fd)
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{
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const char *path;
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path = archive_entry_sourcepath(entry);
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if (path == NULL || (a->tree != NULL &&
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a->tree_enter_working_dir(a->tree) != 0))
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path = archive_entry_pathname(entry);
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if (path == NULL) {
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"Couldn't determine path");
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} else if (fd != NULL && *fd < 0 && a->tree != NULL &&
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(a->follow_symlinks || archive_entry_filetype(entry) != AE_IFLNK)) {
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*fd = a->open_on_current_dir(a->tree, path,
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O_RDONLY | O_NONBLOCK);
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}
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return (path);
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}
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int
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archive_read_disk_entry_from_file(struct archive *_a,
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struct archive_entry *entry,
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int fd,
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const struct stat *st)
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{
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struct archive_read_disk *a = (struct archive_read_disk *)_a;
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const char *path, *name;
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struct stat s;
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int initial_fd = fd;
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int r, r1;
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archive_clear_error(_a);
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path = archive_entry_sourcepath(entry);
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if (path == NULL)
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path = archive_entry_pathname(entry);
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if (a->tree == NULL) {
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if (st == NULL) {
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#if HAVE_FSTAT
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if (fd >= 0) {
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if (fstat(fd, &s) != 0) {
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archive_set_error(&a->archive, errno,
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"Can't fstat");
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return (ARCHIVE_FAILED);
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}
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} else
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#endif
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#if HAVE_LSTAT
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if (!a->follow_symlinks) {
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if (lstat(path, &s) != 0) {
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archive_set_error(&a->archive, errno,
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"Can't lstat %s", path);
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return (ARCHIVE_FAILED);
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}
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} else
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#endif
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if (stat(path, &s) != 0) {
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archive_set_error(&a->archive, errno,
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"Can't stat %s", path);
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return (ARCHIVE_FAILED);
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}
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st = &s;
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}
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archive_entry_copy_stat(entry, st);
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}
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/* Lookup uname/gname */
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name = archive_read_disk_uname(_a, archive_entry_uid(entry));
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if (name != NULL)
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archive_entry_copy_uname(entry, name);
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name = archive_read_disk_gname(_a, archive_entry_gid(entry));
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if (name != NULL)
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archive_entry_copy_gname(entry, name);
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#ifdef HAVE_STRUCT_STAT_ST_FLAGS
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/* On FreeBSD, we get flags for free with the stat. */
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/* TODO: Does this belong in copy_stat()? */
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if ((a->flags & ARCHIVE_READDISK_NO_FFLAGS) == 0 && st->st_flags != 0)
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archive_entry_set_fflags(entry, st->st_flags, 0);
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#endif
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#if (defined(FS_IOC_GETFLAGS) && defined(HAVE_WORKING_FS_IOC_GETFLAGS)) || \
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(defined(EXT2_IOC_GETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS))
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/* Linux requires an extra ioctl to pull the flags. Although
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* this is an extra step, it has a nice side-effect: We get an
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* open file descriptor which we can use in the subsequent lookups. */
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if ((a->flags & ARCHIVE_READDISK_NO_FFLAGS) == 0 &&
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(S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
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if (fd < 0) {
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if (a->tree != NULL)
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fd = a->open_on_current_dir(a->tree, path,
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O_RDONLY | O_NONBLOCK | O_CLOEXEC);
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else
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fd = open(path, O_RDONLY | O_NONBLOCK |
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O_CLOEXEC);
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__archive_ensure_cloexec_flag(fd);
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}
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if (fd >= 0) {
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int stflags;
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r = ioctl(fd,
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#if defined(FS_IOC_GETFLAGS)
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FS_IOC_GETFLAGS,
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#else
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EXT2_IOC_GETFLAGS,
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#endif
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&stflags);
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if (r == 0 && stflags != 0)
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archive_entry_set_fflags(entry, stflags, 0);
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}
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}
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#endif
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#if defined(HAVE_READLINK) || defined(HAVE_READLINKAT)
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if (S_ISLNK(st->st_mode)) {
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size_t linkbuffer_len = st->st_size + 1;
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char *linkbuffer;
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int lnklen;
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linkbuffer = malloc(linkbuffer_len);
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if (linkbuffer == NULL) {
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archive_set_error(&a->archive, ENOMEM,
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"Couldn't read link data");
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return (ARCHIVE_FAILED);
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}
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if (a->tree != NULL) {
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#ifdef HAVE_READLINKAT
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lnklen = readlinkat(a->tree_current_dir_fd(a->tree),
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path, linkbuffer, linkbuffer_len);
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#else
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if (a->tree_enter_working_dir(a->tree) != 0) {
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archive_set_error(&a->archive, errno,
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"Couldn't read link data");
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free(linkbuffer);
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return (ARCHIVE_FAILED);
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}
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lnklen = readlink(path, linkbuffer, linkbuffer_len);
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#endif /* HAVE_READLINKAT */
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} else
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lnklen = readlink(path, linkbuffer, linkbuffer_len);
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if (lnklen < 0) {
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archive_set_error(&a->archive, errno,
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"Couldn't read link data");
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free(linkbuffer);
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return (ARCHIVE_FAILED);
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}
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linkbuffer[lnklen] = 0;
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archive_entry_set_symlink(entry, linkbuffer);
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free(linkbuffer);
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}
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#endif /* HAVE_READLINK || HAVE_READLINKAT */
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r = 0;
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if ((a->flags & ARCHIVE_READDISK_NO_ACL) == 0)
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r = archive_read_disk_entry_setup_acls(a, entry, &fd);
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if ((a->flags & ARCHIVE_READDISK_NO_XATTR) == 0) {
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r1 = setup_xattrs(a, entry, &fd);
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if (r1 < r)
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r = r1;
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}
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if (a->flags & ARCHIVE_READDISK_MAC_COPYFILE) {
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r1 = setup_mac_metadata(a, entry, &fd);
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if (r1 < r)
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r = r1;
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}
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r1 = setup_sparse(a, entry, &fd);
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if (r1 < r)
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r = r1;
|
|
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/* If we opened the file earlier in this function, close it. */
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if (initial_fd != fd)
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close(fd);
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return (r);
|
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}
|
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|
|
#if defined(__APPLE__) && defined(HAVE_COPYFILE_H)
|
|
/*
|
|
* The Mac OS "copyfile()" API copies the extended metadata for a
|
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* file into a separate file in AppleDouble format (see RFC 1740).
|
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*
|
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* Mac OS tar and cpio implementations store this extended
|
|
* metadata as a separate entry just before the regular entry
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* with a "._" prefix added to the filename.
|
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*
|
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* Note that this is currently done unconditionally; the tar program has
|
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* an option to discard this information before the archive is written.
|
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*
|
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* TODO: If there's a failure, report it and return ARCHIVE_WARN.
|
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*/
|
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static int
|
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setup_mac_metadata(struct archive_read_disk *a,
|
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struct archive_entry *entry, int *fd)
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{
|
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int tempfd = -1;
|
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int copyfile_flags = COPYFILE_NOFOLLOW | COPYFILE_ACL | COPYFILE_XATTR;
|
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struct stat copyfile_stat;
|
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int ret = ARCHIVE_OK;
|
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void *buff = NULL;
|
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int have_attrs;
|
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const char *name, *tempdir;
|
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struct archive_string tempfile;
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|
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(void)fd; /* UNUSED */
|
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name = archive_read_disk_entry_setup_path(a, entry, NULL);
|
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if (name == NULL)
|
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return (ARCHIVE_WARN);
|
|
|
|
/* Short-circuit if there's nothing to do. */
|
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have_attrs = copyfile(name, NULL, 0, copyfile_flags | COPYFILE_CHECK);
|
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if (have_attrs == -1) {
|
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archive_set_error(&a->archive, errno,
|
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"Could not check extended attributes");
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return (ARCHIVE_WARN);
|
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}
|
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if (have_attrs == 0)
|
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return (ARCHIVE_OK);
|
|
|
|
tempdir = NULL;
|
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if (issetugid() == 0)
|
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tempdir = getenv("TMPDIR");
|
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if (tempdir == NULL)
|
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tempdir = _PATH_TMP;
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archive_string_init(&tempfile);
|
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archive_strcpy(&tempfile, tempdir);
|
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archive_strcat(&tempfile, "tar.md.XXXXXX");
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tempfd = mkstemp(tempfile.s);
|
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if (tempfd < 0) {
|
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archive_set_error(&a->archive, errno,
|
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"Could not open extended attribute file");
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ret = ARCHIVE_WARN;
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goto cleanup;
|
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}
|
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__archive_ensure_cloexec_flag(tempfd);
|
|
|
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/* XXX I wish copyfile() could pack directly to a memory
|
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* buffer; that would avoid the temp file here. For that
|
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* matter, it would be nice if fcopyfile() actually worked,
|
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* that would reduce the many open/close races here. */
|
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if (copyfile(name, tempfile.s, 0, copyfile_flags | COPYFILE_PACK)) {
|
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archive_set_error(&a->archive, errno,
|
|
"Could not pack extended attributes");
|
|
ret = ARCHIVE_WARN;
|
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goto cleanup;
|
|
}
|
|
if (fstat(tempfd, ©file_stat)) {
|
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archive_set_error(&a->archive, errno,
|
|
"Could not check size of extended attributes");
|
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ret = ARCHIVE_WARN;
|
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goto cleanup;
|
|
}
|
|
buff = malloc(copyfile_stat.st_size);
|
|
if (buff == NULL) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Could not allocate memory for extended attributes");
|
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ret = ARCHIVE_WARN;
|
|
goto cleanup;
|
|
}
|
|
if (copyfile_stat.st_size != read(tempfd, buff, copyfile_stat.st_size)) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Could not read extended attributes into memory");
|
|
ret = ARCHIVE_WARN;
|
|
goto cleanup;
|
|
}
|
|
archive_entry_copy_mac_metadata(entry, buff, copyfile_stat.st_size);
|
|
|
|
cleanup:
|
|
if (tempfd >= 0) {
|
|
close(tempfd);
|
|
unlink(tempfile.s);
|
|
}
|
|
archive_string_free(&tempfile);
|
|
free(buff);
|
|
return (ret);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* Stub implementation for non-Mac systems.
|
|
*/
|
|
static int
|
|
setup_mac_metadata(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
(void)a; /* UNUSED */
|
|
(void)entry; /* UNUSED */
|
|
(void)fd; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
#endif
|
|
|
|
#if ARCHIVE_XATTR_LINUX || ARCHIVE_XATTR_DARWIN || ARCHIVE_XATTR_AIX
|
|
|
|
/*
|
|
* Linux, Darwin and AIX extended attribute support.
|
|
*
|
|
* TODO: By using a stack-allocated buffer for the first
|
|
* call to getxattr(), we might be able to avoid the second
|
|
* call entirely. We only need the second call if the
|
|
* stack-allocated buffer is too small. But a modest buffer
|
|
* of 1024 bytes or so will often be big enough. Same applies
|
|
* to listxattr().
|
|
*/
|
|
|
|
|
|
static int
|
|
setup_xattr(struct archive_read_disk *a,
|
|
struct archive_entry *entry, const char *name, int fd, const char *accpath)
|
|
{
|
|
ssize_t size;
|
|
void *value = NULL;
|
|
|
|
|
|
if (fd >= 0) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
size = fgetxattr(fd, name, NULL, 0);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
size = fgetxattr(fd, name, NULL, 0, 0, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
size = fgetea(fd, name, NULL, 0);
|
|
#endif
|
|
} else if (!a->follow_symlinks) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
size = lgetxattr(accpath, name, NULL, 0);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
size = getxattr(accpath, name, NULL, 0, 0, XATTR_NOFOLLOW);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
size = lgetea(accpath, name, NULL, 0);
|
|
#endif
|
|
} else {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
size = getxattr(accpath, name, NULL, 0);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
size = getxattr(accpath, name, NULL, 0, 0, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
size = getea(accpath, name, NULL, 0);
|
|
#endif
|
|
}
|
|
|
|
if (size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't query extended attribute");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (size > 0 && (value = malloc(size)) == NULL) {
|
|
archive_set_error(&a->archive, errno, "Out of memory");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
|
|
if (fd >= 0) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
size = fgetxattr(fd, name, value, size);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
size = fgetxattr(fd, name, value, size, 0, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
size = fgetea(fd, name, value, size);
|
|
#endif
|
|
} else if (!a->follow_symlinks) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
size = lgetxattr(accpath, name, value, size);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
size = getxattr(accpath, name, value, size, 0, XATTR_NOFOLLOW);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
size = lgetea(accpath, name, value, size);
|
|
#endif
|
|
} else {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
size = getxattr(accpath, name, value, size);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
size = getxattr(accpath, name, value, size, 0, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
size = getea(accpath, name, value, size);
|
|
#endif
|
|
}
|
|
|
|
if (size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't read extended attribute");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
archive_entry_xattr_add_entry(entry, name, value, size);
|
|
|
|
free(value);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
setup_xattrs(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
char *list, *p;
|
|
const char *path;
|
|
ssize_t list_size;
|
|
|
|
path = NULL;
|
|
|
|
if (*fd < 0) {
|
|
path = archive_read_disk_entry_setup_path(a, entry, fd);
|
|
if (path == NULL)
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (*fd >= 0) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
list_size = flistxattr(*fd, NULL, 0);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
list_size = flistxattr(*fd, NULL, 0, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
list_size = flistea(*fd, NULL, 0);
|
|
#endif
|
|
} else if (!a->follow_symlinks) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
list_size = llistxattr(path, NULL, 0);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
list_size = listxattr(path, NULL, 0, XATTR_NOFOLLOW);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
list_size = llistea(path, NULL, 0);
|
|
#endif
|
|
} else {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
list_size = listxattr(path, NULL, 0);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
list_size = listxattr(path, NULL, 0, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
list_size = listea(path, NULL, 0);
|
|
#endif
|
|
}
|
|
|
|
if (list_size == -1) {
|
|
if (errno == ENOTSUP || errno == ENOSYS)
|
|
return (ARCHIVE_OK);
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't list extended attributes");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (list_size == 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
if ((list = malloc(list_size)) == NULL) {
|
|
archive_set_error(&a->archive, errno, "Out of memory");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
if (*fd >= 0) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
list_size = flistxattr(*fd, list, list_size);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
list_size = flistxattr(*fd, list, list_size, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
list_size = flistea(*fd, list, list_size);
|
|
#endif
|
|
} else if (!a->follow_symlinks) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
list_size = llistxattr(path, list, list_size);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
list_size = listxattr(path, list, list_size, XATTR_NOFOLLOW);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
list_size = llistea(path, list, list_size);
|
|
#endif
|
|
} else {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
list_size = listxattr(path, list, list_size);
|
|
#elif ARCHIVE_XATTR_DARWIN
|
|
list_size = listxattr(path, list, list_size, 0);
|
|
#elif ARCHIVE_XATTR_AIX
|
|
list_size = listea(path, list, list_size);
|
|
#endif
|
|
}
|
|
|
|
if (list_size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't retrieve extended attributes");
|
|
free(list);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
|
|
#if ARCHIVE_XATTR_LINUX
|
|
/* Linux: skip POSIX.1e ACL extended attributes */
|
|
if (strncmp(p, "system.", 7) == 0 &&
|
|
(strcmp(p + 7, "posix_acl_access") == 0 ||
|
|
strcmp(p + 7, "posix_acl_default") == 0))
|
|
continue;
|
|
if (strncmp(p, "trusted.SGI_", 12) == 0 &&
|
|
(strcmp(p + 12, "ACL_DEFAULT") == 0 ||
|
|
strcmp(p + 12, "ACL_FILE") == 0))
|
|
continue;
|
|
|
|
/* Linux: xfsroot namespace is obsolete and unsupported */
|
|
if (strncmp(p, "xfsroot.", 8) == 0)
|
|
continue;
|
|
#endif
|
|
setup_xattr(a, entry, p, *fd, path);
|
|
}
|
|
|
|
free(list);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
#elif ARCHIVE_XATTR_FREEBSD
|
|
|
|
/*
|
|
* FreeBSD extattr interface.
|
|
*/
|
|
|
|
/* TODO: Implement this. Follow the Linux model above, but
|
|
* with FreeBSD-specific system calls, of course. Be careful
|
|
* to not include the system extattrs that hold ACLs; we handle
|
|
* those separately.
|
|
*/
|
|
static int
|
|
setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
|
|
int namespace, const char *name, const char *fullname, int fd,
|
|
const char *path);
|
|
|
|
static int
|
|
setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
|
|
int namespace, const char *name, const char *fullname, int fd,
|
|
const char *accpath)
|
|
{
|
|
ssize_t size;
|
|
void *value = NULL;
|
|
|
|
if (fd >= 0)
|
|
size = extattr_get_fd(fd, namespace, name, NULL, 0);
|
|
else if (!a->follow_symlinks)
|
|
size = extattr_get_link(accpath, namespace, name, NULL, 0);
|
|
else
|
|
size = extattr_get_file(accpath, namespace, name, NULL, 0);
|
|
|
|
if (size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't query extended attribute");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (size > 0 && (value = malloc(size)) == NULL) {
|
|
archive_set_error(&a->archive, errno, "Out of memory");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
if (fd >= 0)
|
|
size = extattr_get_fd(fd, namespace, name, value, size);
|
|
else if (!a->follow_symlinks)
|
|
size = extattr_get_link(accpath, namespace, name, value, size);
|
|
else
|
|
size = extattr_get_file(accpath, namespace, name, value, size);
|
|
|
|
if (size == -1) {
|
|
free(value);
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't read extended attribute");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
archive_entry_xattr_add_entry(entry, fullname, value, size);
|
|
|
|
free(value);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
setup_xattrs(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
char buff[512];
|
|
char *list, *p;
|
|
ssize_t list_size;
|
|
const char *path;
|
|
int namespace = EXTATTR_NAMESPACE_USER;
|
|
|
|
path = NULL;
|
|
|
|
if (*fd < 0) {
|
|
path = archive_read_disk_entry_setup_path(a, entry, fd);
|
|
if (path == NULL)
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (*fd >= 0)
|
|
list_size = extattr_list_fd(*fd, namespace, NULL, 0);
|
|
else if (!a->follow_symlinks)
|
|
list_size = extattr_list_link(path, namespace, NULL, 0);
|
|
else
|
|
list_size = extattr_list_file(path, namespace, NULL, 0);
|
|
|
|
if (list_size == -1 && errno == EOPNOTSUPP)
|
|
return (ARCHIVE_OK);
|
|
if (list_size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't list extended attributes");
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
if (list_size == 0)
|
|
return (ARCHIVE_OK);
|
|
|
|
if ((list = malloc(list_size)) == NULL) {
|
|
archive_set_error(&a->archive, errno, "Out of memory");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
if (*fd >= 0)
|
|
list_size = extattr_list_fd(*fd, namespace, list, list_size);
|
|
else if (!a->follow_symlinks)
|
|
list_size = extattr_list_link(path, namespace, list, list_size);
|
|
else
|
|
list_size = extattr_list_file(path, namespace, list, list_size);
|
|
|
|
if (list_size == -1) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Couldn't retrieve extended attributes");
|
|
free(list);
|
|
return (ARCHIVE_WARN);
|
|
}
|
|
|
|
p = list;
|
|
while ((p - list) < list_size) {
|
|
size_t len = 255 & (int)*p;
|
|
char *name;
|
|
|
|
strcpy(buff, "user.");
|
|
name = buff + strlen(buff);
|
|
memcpy(name, p + 1, len);
|
|
name[len] = '\0';
|
|
setup_xattr(a, entry, namespace, name, buff, *fd, path);
|
|
p += 1 + len;
|
|
}
|
|
|
|
free(list);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* Generic (stub) extended attribute support.
|
|
*/
|
|
static int
|
|
setup_xattrs(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
(void)a; /* UNUSED */
|
|
(void)entry; /* UNUSED */
|
|
(void)fd; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(HAVE_LINUX_FIEMAP_H)
|
|
|
|
/*
|
|
* Linux FIEMAP sparse interface.
|
|
*
|
|
* The FIEMAP ioctl returns an "extent" for each physical allocation
|
|
* on disk. We need to process those to generate a more compact list
|
|
* of logical file blocks. We also need to be very careful to use
|
|
* FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes
|
|
* does not report allocations for newly-written data that hasn't
|
|
* been synced to disk.
|
|
*
|
|
* It's important to return a minimal sparse file list because we want
|
|
* to not trigger sparse file extensions if we don't have to, since
|
|
* not all readers support them.
|
|
*/
|
|
|
|
static int
|
|
setup_sparse_fiemap(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
char buff[4096];
|
|
struct fiemap *fm;
|
|
struct fiemap_extent *fe;
|
|
int64_t size;
|
|
int count, do_fiemap, iters;
|
|
int exit_sts = ARCHIVE_OK;
|
|
const char *path;
|
|
|
|
if (archive_entry_filetype(entry) != AE_IFREG
|
|
|| archive_entry_size(entry) <= 0
|
|
|| archive_entry_hardlink(entry) != NULL)
|
|
return (ARCHIVE_OK);
|
|
|
|
if (*fd < 0) {
|
|
path = archive_read_disk_entry_setup_path(a, entry, NULL);
|
|
if (path == NULL)
|
|
return (ARCHIVE_FAILED);
|
|
|
|
if (a->tree != NULL)
|
|
*fd = a->open_on_current_dir(a->tree, path,
|
|
O_RDONLY | O_NONBLOCK | O_CLOEXEC);
|
|
else
|
|
*fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
|
|
if (*fd < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't open `%s'", path);
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
__archive_ensure_cloexec_flag(*fd);
|
|
}
|
|
|
|
/* Initialize buffer to avoid the error valgrind complains about. */
|
|
memset(buff, 0, sizeof(buff));
|
|
count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe);
|
|
fm = (struct fiemap *)buff;
|
|
fm->fm_start = 0;
|
|
fm->fm_length = ~0ULL;;
|
|
fm->fm_flags = FIEMAP_FLAG_SYNC;
|
|
fm->fm_extent_count = count;
|
|
do_fiemap = 1;
|
|
size = archive_entry_size(entry);
|
|
for (iters = 0; ; ++iters) {
|
|
int i, r;
|
|
|
|
r = ioctl(*fd, FS_IOC_FIEMAP, fm);
|
|
if (r < 0) {
|
|
/* When something error happens, it is better we
|
|
* should return ARCHIVE_OK because an earlier
|
|
* version(<2.6.28) cannot perform FS_IOC_FIEMAP. */
|
|
goto exit_setup_sparse_fiemap;
|
|
}
|
|
if (fm->fm_mapped_extents == 0) {
|
|
if (iters == 0) {
|
|
/* Fully sparse file; insert a zero-length "data" entry */
|
|
archive_entry_sparse_add_entry(entry, 0, 0);
|
|
}
|
|
break;
|
|
}
|
|
fe = fm->fm_extents;
|
|
for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) {
|
|
if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) {
|
|
/* The fe_length of the last block does not
|
|
* adjust itself to its size files. */
|
|
int64_t length = fe->fe_length;
|
|
if (fe->fe_logical + length > (uint64_t)size)
|
|
length -= fe->fe_logical + length - size;
|
|
if (fe->fe_logical == 0 && length == size) {
|
|
/* This is not sparse. */
|
|
do_fiemap = 0;
|
|
break;
|
|
}
|
|
if (length > 0)
|
|
archive_entry_sparse_add_entry(entry,
|
|
fe->fe_logical, length);
|
|
}
|
|
if (fe->fe_flags & FIEMAP_EXTENT_LAST)
|
|
do_fiemap = 0;
|
|
}
|
|
if (do_fiemap) {
|
|
fe = fm->fm_extents + fm->fm_mapped_extents -1;
|
|
fm->fm_start = fe->fe_logical + fe->fe_length;
|
|
} else
|
|
break;
|
|
}
|
|
exit_setup_sparse_fiemap:
|
|
return (exit_sts);
|
|
}
|
|
|
|
#if !defined(SEEK_HOLE) || !defined(SEEK_DATA)
|
|
static int
|
|
setup_sparse(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
return setup_sparse_fiemap(a, entry, fd);
|
|
}
|
|
#endif
|
|
#endif /* defined(HAVE_LINUX_FIEMAP_H) */
|
|
|
|
#if defined(SEEK_HOLE) && defined(SEEK_DATA)
|
|
|
|
/*
|
|
* SEEK_HOLE sparse interface (FreeBSD, Linux, Solaris)
|
|
*/
|
|
|
|
static int
|
|
setup_sparse(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
int64_t size;
|
|
off_t initial_off;
|
|
off_t off_s, off_e;
|
|
int exit_sts = ARCHIVE_OK;
|
|
int check_fully_sparse = 0;
|
|
const char *path;
|
|
|
|
if (archive_entry_filetype(entry) != AE_IFREG
|
|
|| archive_entry_size(entry) <= 0
|
|
|| archive_entry_hardlink(entry) != NULL)
|
|
return (ARCHIVE_OK);
|
|
|
|
/* Does filesystem support the reporting of hole ? */
|
|
if (*fd < 0)
|
|
path = archive_read_disk_entry_setup_path(a, entry, fd);
|
|
else
|
|
path = NULL;
|
|
|
|
if (*fd >= 0) {
|
|
#ifdef _PC_MIN_HOLE_SIZE
|
|
if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0)
|
|
return (ARCHIVE_OK);
|
|
#endif
|
|
initial_off = lseek(*fd, 0, SEEK_CUR);
|
|
if (initial_off != 0)
|
|
lseek(*fd, 0, SEEK_SET);
|
|
} else {
|
|
if (path == NULL)
|
|
return (ARCHIVE_FAILED);
|
|
#ifdef _PC_MIN_HOLE_SIZE
|
|
if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0)
|
|
return (ARCHIVE_OK);
|
|
#endif
|
|
*fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
|
|
if (*fd < 0) {
|
|
archive_set_error(&a->archive, errno,
|
|
"Can't open `%s'", path);
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
__archive_ensure_cloexec_flag(*fd);
|
|
initial_off = 0;
|
|
}
|
|
|
|
#ifndef _PC_MIN_HOLE_SIZE
|
|
/* Check if the underlying filesystem supports seek hole */
|
|
off_s = lseek(*fd, 0, SEEK_HOLE);
|
|
if (off_s < 0)
|
|
#if defined(HAVE_LINUX_FIEMAP_H)
|
|
return setup_sparse_fiemap(a, entry, fd);
|
|
#else
|
|
goto exit_setup_sparse;
|
|
#endif
|
|
else if (off_s > 0)
|
|
lseek(*fd, 0, SEEK_SET);
|
|
#endif
|
|
|
|
off_s = 0;
|
|
size = archive_entry_size(entry);
|
|
while (off_s < size) {
|
|
off_s = lseek(*fd, off_s, SEEK_DATA);
|
|
if (off_s == (off_t)-1) {
|
|
if (errno == ENXIO) {
|
|
/* no more hole */
|
|
if (archive_entry_sparse_count(entry) == 0) {
|
|
/* Potentially a fully-sparse file. */
|
|
check_fully_sparse = 1;
|
|
}
|
|
break;
|
|
}
|
|
archive_set_error(&a->archive, errno,
|
|
"lseek(SEEK_HOLE) failed");
|
|
exit_sts = ARCHIVE_FAILED;
|
|
goto exit_setup_sparse;
|
|
}
|
|
off_e = lseek(*fd, off_s, SEEK_HOLE);
|
|
if (off_e == (off_t)-1) {
|
|
if (errno == ENXIO) {
|
|
off_e = lseek(*fd, 0, SEEK_END);
|
|
if (off_e != (off_t)-1)
|
|
break;/* no more data */
|
|
}
|
|
archive_set_error(&a->archive, errno,
|
|
"lseek(SEEK_DATA) failed");
|
|
exit_sts = ARCHIVE_FAILED;
|
|
goto exit_setup_sparse;
|
|
}
|
|
if (off_s == 0 && off_e == size)
|
|
break;/* This is not sparse. */
|
|
archive_entry_sparse_add_entry(entry, off_s,
|
|
off_e - off_s);
|
|
off_s = off_e;
|
|
}
|
|
|
|
if (check_fully_sparse) {
|
|
if (lseek(*fd, 0, SEEK_HOLE) == 0 &&
|
|
lseek(*fd, 0, SEEK_END) == size) {
|
|
/* Fully sparse file; insert a zero-length "data" entry */
|
|
archive_entry_sparse_add_entry(entry, 0, 0);
|
|
}
|
|
}
|
|
exit_setup_sparse:
|
|
lseek(*fd, initial_off, SEEK_SET);
|
|
return (exit_sts);
|
|
}
|
|
|
|
#elif !defined(HAVE_LINUX_FIEMAP_H)
|
|
|
|
/*
|
|
* Generic (stub) sparse support.
|
|
*/
|
|
static int
|
|
setup_sparse(struct archive_read_disk *a,
|
|
struct archive_entry *entry, int *fd)
|
|
{
|
|
(void)a; /* UNUSED */
|
|
(void)entry; /* UNUSED */
|
|
(void)fd; /* UNUSED */
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* !defined(_WIN32) || defined(__CYGWIN__) */
|
|
|