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555 lines
15 KiB
555 lines
15 KiB
15 years ago
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/*-
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* Copyright (c) 2003-2009 Tim Kientzle
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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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#ifdef HAVE_SYS_TYPES_H
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/* Mac OSX requires sys/types.h before sys/acl.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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#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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#ifdef HAVE_SYS_XATTR_H
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#include <sys/xattr.h>
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#endif
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#ifdef HAVE_ACL_LIBACL_H
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#include <acl/libacl.h>
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#endif
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#ifdef HAVE_ATTR_XATTR_H
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#include <attr/xattr.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_LIMITS_H
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#include <limits.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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#include <windows.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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/*
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* Linux and FreeBSD plug this obvious hole in POSIX.1e in
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* different ways.
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*/
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#if HAVE_ACL_GET_PERM
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#define ACL_GET_PERM acl_get_perm
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#elif HAVE_ACL_GET_PERM_NP
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#define ACL_GET_PERM acl_get_perm_np
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#endif
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static int setup_acls_posix1e(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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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, 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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#ifdef 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 ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
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if (fd < 0)
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fd = open(pathname, O_RDONLY | O_NONBLOCK | O_BINARY);
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if (fd >= 0) {
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unsigned long stflags;
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int r = ioctl(fd, EXT2_IOC_GETFLAGS, &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 (st == NULL) {
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/* TODO: On Windows, use GetFileInfoByHandle() here.
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* Using Windows stat() call is badly broken, but
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* even the stat() wrapper has problems because
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* 'struct stat' is broken on Windows.
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*/
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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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return (ARCHIVE_FATAL);
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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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return (ARCHIVE_FATAL);
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} else
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#endif
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if (stat(path, &s) != 0)
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return (ARCHIVE_FATAL);
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st = &s;
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}
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archive_entry_copy_stat(entry, st);
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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 (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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#ifdef HAVE_READLINK
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if (S_ISLNK(st->st_mode)) {
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char linkbuffer[PATH_MAX + 1];
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int lnklen = readlink(path, linkbuffer, PATH_MAX);
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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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return (ARCHIVE_WARN);
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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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}
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#endif
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r = setup_acls_posix1e(a, entry, fd);
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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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/* 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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#ifdef HAVE_POSIX_ACL
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static void setup_acl_posix1e(struct archive_read_disk *a,
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struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);
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static int
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setup_acls_posix1e(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 *accpath;
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acl_t acl;
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accpath = archive_entry_sourcepath(entry);
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if (accpath == NULL)
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accpath = archive_entry_pathname(entry);
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archive_entry_acl_clear(entry);
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/* Retrieve access ACL from file. */
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if (fd >= 0)
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acl = acl_get_fd(fd);
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#if HAVE_ACL_GET_LINK_NP
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else if (!a->follow_symlinks)
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acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
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#endif
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else
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acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
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if (acl != NULL) {
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setup_acl_posix1e(a, entry, acl,
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ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
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acl_free(acl);
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}
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/* Only directories can have default ACLs. */
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if (S_ISDIR(archive_entry_mode(entry))) {
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acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
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if (acl != NULL) {
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setup_acl_posix1e(a, entry, acl,
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ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
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acl_free(acl);
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}
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}
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return (ARCHIVE_OK);
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}
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/*
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* Translate POSIX.1e ACL into libarchive internal structure.
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*/
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static void
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setup_acl_posix1e(struct archive_read_disk *a,
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struct archive_entry *entry, acl_t acl, int archive_entry_acl_type)
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{
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acl_tag_t acl_tag;
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acl_entry_t acl_entry;
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acl_permset_t acl_permset;
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int s, ae_id, ae_tag, ae_perm;
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const char *ae_name;
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s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
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while (s == 1) {
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ae_id = -1;
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ae_name = NULL;
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acl_get_tag_type(acl_entry, &acl_tag);
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if (acl_tag == ACL_USER) {
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ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
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ae_name = archive_read_disk_uname(&a->archive, ae_id);
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ae_tag = ARCHIVE_ENTRY_ACL_USER;
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} else if (acl_tag == ACL_GROUP) {
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ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
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ae_name = archive_read_disk_gname(&a->archive, ae_id);
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ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
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} else if (acl_tag == ACL_MASK) {
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ae_tag = ARCHIVE_ENTRY_ACL_MASK;
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} else if (acl_tag == ACL_USER_OBJ) {
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ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
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} else if (acl_tag == ACL_GROUP_OBJ) {
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ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
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} else if (acl_tag == ACL_OTHER) {
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ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
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} else {
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/* Skip types that libarchive can't support. */
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continue;
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}
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acl_get_permset(acl_entry, &acl_permset);
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ae_perm = 0;
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/*
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* acl_get_perm() is spelled differently on different
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* platforms; see above.
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*/
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if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
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ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
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if (ACL_GET_PERM(acl_permset, ACL_READ))
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ae_perm |= ARCHIVE_ENTRY_ACL_READ;
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if (ACL_GET_PERM(acl_permset, ACL_WRITE))
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ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
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archive_entry_acl_add_entry(entry,
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archive_entry_acl_type, ae_perm, ae_tag,
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ae_id, ae_name);
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s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
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}
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}
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#else
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static int
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setup_acls_posix1e(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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#if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR
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/*
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* Linux extended attribute support.
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*
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* TODO: By using a stack-allocated buffer for the first
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* call to getxattr(), we might be able to avoid the second
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* call entirely. We only need the second call if the
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* stack-allocated buffer is too small. But a modest buffer
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* of 1024 bytes or so will often be big enough. Same applies
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* to listxattr().
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*/
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static int
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setup_xattr(struct archive_read_disk *a,
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struct archive_entry *entry, const char *name, int fd)
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{
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ssize_t size;
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void *value = NULL;
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const char *accpath;
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(void)fd; /* UNUSED */
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accpath = archive_entry_sourcepath(entry);
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if (accpath == NULL)
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accpath = archive_entry_pathname(entry);
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if (!a->follow_symlinks)
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size = lgetxattr(accpath, name, NULL, 0);
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else
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size = getxattr(accpath, name, NULL, 0);
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if (size == -1) {
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archive_set_error(&a->archive, errno,
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"Couldn't query extended attribute");
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return (ARCHIVE_WARN);
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}
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if (size > 0 && (value = malloc(size)) == NULL) {
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archive_set_error(&a->archive, errno, "Out of memory");
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return (ARCHIVE_FATAL);
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}
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if (!a->follow_symlinks)
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size = lgetxattr(accpath, name, value, size);
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else
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size = getxattr(accpath, name, value, size);
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if (size == -1) {
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archive_set_error(&a->archive, errno,
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"Couldn't read extended attribute");
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return (ARCHIVE_WARN);
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}
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archive_entry_xattr_add_entry(entry, name, value, size);
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free(value);
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return (ARCHIVE_OK);
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}
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static int
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setup_xattrs(struct archive_read_disk *a,
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struct archive_entry *entry, int fd)
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{
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char *list, *p;
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const char *path;
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ssize_t list_size;
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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->follow_symlinks)
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list_size = llistxattr(path, NULL, 0);
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else
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list_size = listxattr(path, NULL, 0);
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if (list_size == -1) {
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if (errno == ENOTSUP)
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return (ARCHIVE_OK);
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archive_set_error(&a->archive, errno,
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"Couldn't list extended attributes");
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return (ARCHIVE_WARN);
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}
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if (list_size == 0)
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return (ARCHIVE_OK);
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if ((list = malloc(list_size)) == NULL) {
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archive_set_error(&a->archive, errno, "Out of memory");
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return (ARCHIVE_FATAL);
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}
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if (!a->follow_symlinks)
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list_size = llistxattr(path, list, list_size);
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else
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list_size = listxattr(path, list, list_size);
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if (list_size == -1) {
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archive_set_error(&a->archive, errno,
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"Couldn't retrieve extended attributes");
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free(list);
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return (ARCHIVE_WARN);
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}
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for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
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if (strncmp(p, "system.", 7) == 0 ||
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strncmp(p, "xfsroot.", 8) == 0)
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continue;
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setup_xattr(a, entry, p, fd);
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}
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free(list);
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return (ARCHIVE_OK);
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}
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#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE
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/*
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* FreeBSD extattr interface.
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*/
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/* TODO: Implement this. Follow the Linux model above, but
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||
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* with FreeBSD-specific system calls, of course. Be careful
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||
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* to not include the system extattrs that hold ACLs; we handle
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* those separately.
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*/
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int
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setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
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||
|
int namespace, const char *name, const char *fullname, int fd);
|
||
|
|
||
|
int
|
||
|
setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
|
||
|
int namespace, const char *name, const char *fullname, int fd)
|
||
|
{
|
||
|
ssize_t size;
|
||
|
void *value = NULL;
|
||
|
const char *accpath;
|
||
|
|
||
|
(void)fd; /* UNUSED */
|
||
|
|
||
|
accpath = archive_entry_sourcepath(entry);
|
||
|
if (accpath == NULL)
|
||
|
accpath = archive_entry_pathname(entry);
|
||
|
|
||
|
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 (!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) {
|
||
|
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 = archive_entry_sourcepath(entry);
|
||
|
if (path == NULL)
|
||
|
path = archive_entry_pathname(entry);
|
||
|
|
||
|
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 (!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);
|
||
|
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
|