2
* Copyright (c) 2003-2010 Tim Kientzle
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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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* 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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* 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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#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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#ifdef HAVE_SYS_EXTATTR_H
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#include <sys/extattr.h>
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#ifdef HAVE_SYS_XATTR_H
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#include <sys/xattr.h>
47
#ifdef HAVE_ATTR_XATTR_H
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#include <attr/xattr.h>
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#ifdef HAVE_SYS_STAT_H
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#ifdef HAVE_SYS_TIME_H
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#ifdef HAVE_SYS_UTIME_H
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#include <sys/utime.h>
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#ifdef HAVE_COPYFILE_H
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#ifdef HAVE_LANGINFO_H
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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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* 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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#ifdef HAVE_LINUX_EXT2_FS_H
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#include <linux/ext2_fs.h> /* for Linux file flags */
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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 */
109
#ifdef F_GETTIMES /* Tru64 specific */
110
#include <sys/fcntl1.h>
114
#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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/* 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
125
* should investigate ways to support this generically. */
128
#include "archive_acl_private.h"
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#include "archive_string.h"
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#include "archive_entry.h"
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#include "archive_private.h"
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struct fixup_entry *next;
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struct archive_acl acl;
145
unsigned long atime_nanos;
146
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;
150
size_t mac_metadata_size;
152
int fixup; /* bitmask of what needs fixing */
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* We use a bitmask to track which operations remain to be done for
158
* this file. In particular, this helps us avoid unnecessary
159
* operations when it's possible to take care of one step as a
160
* side-effect of another. For example, mkdir() can specify the mode
161
* 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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#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_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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struct archive_write_disk {
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struct archive archive;
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struct fixup_entry *fixup_list;
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struct fixup_entry *current_fixup;
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int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid);
196
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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* Full path of last file to satisfy symlink checks.
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struct archive_string path_safe;
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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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/* 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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/* Tasks deferred until end-of-archive. */
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/* Options requested by the client. */
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/* Handle for the file we're restoring. */
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/* Current offset for writing data to the file. */
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/* Last offset actually written to disk. */
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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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/* Dir we were in before this restore; only for deep paths. */
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/* Mode we should use for this entry; affected by _PERM and umask. */
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/* UID/GID to use in restoring this entry. */
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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
247
* by the process' file creation mask."
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#define DEFAULT_DIR_MODE 0777
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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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#define MINIMUM_DIR_MODE 0700
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#define MAXIMUM_DIR_MODE 0775
259
static int check_symlinks(struct archive_write_disk *);
260
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);
262
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
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static void edit_deep_directories(struct archive_write_disk *ad);
265
static int cleanup_pathname(struct archive_write_disk *);
266
static int create_dir(struct archive_write_disk *, char *);
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static int create_parent_dir(struct archive_write_disk *, char *);
268
static int older(struct stat *, struct archive_entry *);
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static int restore_entry(struct archive_write_disk *);
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#ifdef HAVE_POSIX_ACL
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static int set_acl(struct archive_write_disk *, int fd, const char *, struct archive_acl *,
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acl_type_t, int archive_entry_acl_type, const char *tn);
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static int set_acls(struct archive_write_disk *, int fd, const char *, struct archive_acl *);
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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 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 *);
283
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);
285
static int set_times(struct archive_write_disk *, int, int, const char *,
286
time_t, long, time_t, long, time_t, long, time_t, long);
287
static int set_times_from_entry(struct archive_write_disk *);
288
static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
289
static ssize_t write_data_block(struct archive_write_disk *,
290
const char *, size_t);
292
static struct archive_vtable *archive_write_disk_vtable(void);
294
static int _archive_write_disk_close(struct archive *);
295
static int _archive_write_disk_free(struct archive *);
296
static int _archive_write_disk_header(struct archive *, struct archive_entry *);
297
static int64_t _archive_write_disk_filter_bytes(struct archive *, int);
298
static int _archive_write_disk_finish_entry(struct archive *);
299
static ssize_t _archive_write_disk_data(struct archive *, const void *, size_t);
300
static ssize_t _archive_write_disk_data_block(struct archive *, const void *, size_t, int64_t);
303
lazy_stat(struct archive_write_disk *a)
305
if (a->pst != NULL) {
306
/* Already have stat() data available. */
310
if (a->fd >= 0 && fstat(a->fd, &a->st) == 0) {
316
* XXX At this point, symlinks should not be hit, otherwise
317
* XXX a race occurred. Do we want to check explicitly for that?
319
if (lstat(a->name, &a->st) == 0) {
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archive_set_error(&a->archive, errno, "Couldn't stat file");
324
return (ARCHIVE_WARN);
327
static struct archive_vtable *
328
archive_write_disk_vtable(void)
330
static struct archive_vtable av;
331
static int inited = 0;
334
av.archive_close = _archive_write_disk_close;
335
av.archive_filter_bytes = _archive_write_disk_filter_bytes;
336
av.archive_free = _archive_write_disk_free;
337
av.archive_write_header = _archive_write_disk_header;
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av.archive_write_finish_entry
339
= _archive_write_disk_finish_entry;
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av.archive_write_data = _archive_write_disk_data;
341
av.archive_write_data_block = _archive_write_disk_data_block;
348
_archive_write_disk_filter_bytes(struct archive *_a, int n)
350
struct archive_write_disk *a = (struct archive_write_disk *)_a;
351
(void)n; /* UNUSED */
352
if (n == -1 || n == 0)
353
return (a->total_bytes_written);
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archive_write_disk_set_options(struct archive *_a, int flags)
361
struct archive_write_disk *a = (struct archive_write_disk *)_a;
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* Extract this entry to disk.
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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
373
* 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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_archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
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struct archive_write_disk *a = (struct archive_write_disk *)_a;
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struct fixup_entry *fe;
386
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
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ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
388
"archive_write_disk_header");
389
archive_clear_error(&a->archive);
390
if (a->archive.state & ARCHIVE_STATE_DATA) {
391
r = _archive_write_disk_finish_entry(&a->archive);
392
if (r == ARCHIVE_FATAL)
396
/* Set up for this particular entry. */
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a->current_fixup = NULL;
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archive_entry_free(a->entry);
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a->entry = archive_entry_clone(entry);
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a->uid = a->user_uid;
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a->mode = archive_entry_mode(a->entry);
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if (archive_entry_size_is_set(a->entry))
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a->filesize = archive_entry_size(a->entry);
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archive_strcpy(&(a->_name_data), archive_entry_pathname(a->entry));
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a->name = a->_name_data.s;
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archive_clear_error(&a->archive);
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* Clean up the requested path. This is necessary for correct
421
* dir restores; the dir restore logic otherwise gets messed
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* up by nonsense like "dir/.".
424
ret = cleanup_pathname(a);
425
if (ret != ARCHIVE_OK)
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* Query the umask so we get predictable mode settings.
430
* This gets done on every call to _write_header in case the
431
* user edits their umask during the extraction for some
434
umask(a->user_umask = umask(0));
436
/* Figure out what we need to do for this entry. */
437
a->todo = TODO_MODE_BASE;
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if (a->flags & ARCHIVE_EXTRACT_PERM) {
439
a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
441
* SGID requires an extra "check" step because we
442
* cannot easily predict the GID that the system will
443
* assign. (Different systems assign GIDs to files
444
* based on a variety of criteria, including process
445
* credentials and the gid of the enclosing
446
* directory.) We can only restore the SGID bit if
447
* the file has the right GID, and we only know the
448
* GID if we either set it (see set_ownership) or if
449
* we've actually called stat() on the file after it
450
* was restored. Since there are several places at
451
* which we might verify the GID, we need a TODO bit
454
if (a->mode & S_ISGID)
455
a->todo |= TODO_SGID | TODO_SGID_CHECK;
457
* Verifying the SUID is simpler, but can still be
458
* done in multiple ways, hence the separate "check" bit.
460
if (a->mode & S_ISUID)
461
a->todo |= TODO_SUID | TODO_SUID_CHECK;
464
* User didn't request full permissions, so don't
465
* restore SUID, SGID bits and obey umask.
470
a->mode &= ~a->user_umask;
472
if (a->flags & ARCHIVE_EXTRACT_OWNER)
473
a->todo |= TODO_OWNER;
474
if (a->flags & ARCHIVE_EXTRACT_TIME)
475
a->todo |= TODO_TIMES;
476
if (a->flags & ARCHIVE_EXTRACT_ACL) {
477
if (archive_entry_filetype(a->entry) == AE_IFDIR)
478
a->deferred |= TODO_ACLS;
480
a->todo |= TODO_ACLS;
482
if (a->flags & ARCHIVE_EXTRACT_MAC_METADATA) {
483
if (archive_entry_filetype(a->entry) == AE_IFDIR)
484
a->deferred |= TODO_MAC_METADATA;
486
a->todo |= TODO_MAC_METADATA;
488
if (a->flags & ARCHIVE_EXTRACT_XATTR)
489
a->todo |= TODO_XATTR;
490
if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
491
a->todo |= TODO_FFLAGS;
492
if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
493
ret = check_symlinks(a);
494
if (ret != ARCHIVE_OK)
497
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
498
/* If path exceeds PATH_MAX, shorten the path. */
499
edit_deep_directories(a);
502
ret = restore_entry(a);
505
* TODO: There are rumours that some extended attributes must
506
* be restored before file data is written. If this is true,
507
* then we either need to write all extended attributes both
508
* before and after restoring the data, or find some rule for
509
* determining which must go first and which last. Due to the
510
* many ways people are using xattrs, this may prove to be an
511
* intractable problem.
515
/* If we changed directory above, restore it here. */
516
if (a->restore_pwd >= 0) {
517
r = fchdir(a->restore_pwd);
519
archive_set_error(&a->archive, errno, "chdir() failure");
522
close(a->restore_pwd);
528
* Fixup uses the unedited pathname from archive_entry_pathname(),
529
* because it is relative to the base dir and the edited path
530
* might be relative to some intermediate dir as a result of the
531
* deep restore logic.
533
if (a->deferred & TODO_MODE) {
534
fe = current_fixup(a, archive_entry_pathname(entry));
535
fe->fixup |= TODO_MODE_BASE;
539
if ((a->deferred & TODO_TIMES)
540
&& (archive_entry_mtime_is_set(entry)
541
|| archive_entry_atime_is_set(entry))) {
542
fe = current_fixup(a, archive_entry_pathname(entry));
544
fe->fixup |= TODO_TIMES;
545
if (archive_entry_atime_is_set(entry)) {
546
fe->atime = archive_entry_atime(entry);
547
fe->atime_nanos = archive_entry_atime_nsec(entry);
549
/* If atime is unset, use start time. */
550
fe->atime = a->start_time;
553
if (archive_entry_mtime_is_set(entry)) {
554
fe->mtime = archive_entry_mtime(entry);
555
fe->mtime_nanos = archive_entry_mtime_nsec(entry);
557
/* If mtime is unset, use start time. */
558
fe->mtime = a->start_time;
561
if (archive_entry_birthtime_is_set(entry)) {
562
fe->birthtime = archive_entry_birthtime(entry);
563
fe->birthtime_nanos = archive_entry_birthtime_nsec(entry);
565
/* If birthtime is unset, use mtime. */
566
fe->birthtime = fe->mtime;
567
fe->birthtime_nanos = fe->mtime_nanos;
571
if (a->deferred & TODO_ACLS) {
572
fe = current_fixup(a, archive_entry_pathname(entry));
573
archive_acl_copy(&fe->acl, archive_entry_acl(entry));
576
if (a->deferred & TODO_MAC_METADATA) {
577
const void *metadata;
578
size_t metadata_size;
579
metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
580
if (metadata != NULL && metadata_size > 0) {
581
fe = current_fixup(a, archive_entry_pathname(entry));
582
fe->mac_metadata = malloc(metadata_size);
583
if (fe->mac_metadata != NULL) {
584
memcpy(fe->mac_metadata, metadata, metadata_size);
585
fe->mac_metadata_size = metadata_size;
586
fe->fixup |= TODO_MAC_METADATA;
591
if (a->deferred & TODO_FFLAGS) {
592
fe = current_fixup(a, archive_entry_pathname(entry));
593
fe->fixup |= TODO_FFLAGS;
594
/* TODO: Complete this.. defer fflags from below. */
597
/* We've created the object and are ready to pour data into it. */
598
if (ret >= ARCHIVE_WARN)
599
a->archive.state = ARCHIVE_STATE_DATA;
601
* If it's not open, tell our client not to try writing.
602
* In particular, dirs, links, etc, don't get written to.
605
archive_entry_set_size(entry, 0);
613
archive_write_disk_set_skip_file(struct archive *_a, int64_t d, int64_t i)
615
struct archive_write_disk *a = (struct archive_write_disk *)_a;
616
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
617
ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
618
a->skip_file_set = 1;
619
a->skip_file_dev = d;
620
a->skip_file_ino = i;
625
write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
627
uint64_t start_size = size;
628
ssize_t bytes_written = 0;
629
ssize_t block_size = 0, bytes_to_write;
634
if (a->filesize == 0 || a->fd < 0) {
635
archive_set_error(&a->archive, 0,
636
"Attempt to write to an empty file");
637
return (ARCHIVE_WARN);
640
if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
641
#if HAVE_STRUCT_STAT_ST_BLKSIZE
643
if ((r = lazy_stat(a)) != ARCHIVE_OK)
645
block_size = a->pst->st_blksize;
647
/* XXX TODO XXX Is there a more appropriate choice here ? */
648
/* This needn't match the filesystem allocation size. */
649
block_size = 16*1024;
653
/* If this write would run beyond the file size, truncate it. */
654
if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
655
start_size = size = (size_t)(a->filesize - a->offset);
657
/* Write the data. */
659
if (block_size == 0) {
660
bytes_to_write = size;
662
/* We're sparsifying the file. */
666
/* Skip leading zero bytes. */
667
for (p = buff, end = buff + size; p < end; ++p) {
671
a->offset += p - buff;
677
/* Calculate next block boundary after offset. */
679
= (a->offset / block_size + 1) * block_size;
681
/* If the adjusted write would cross block boundary,
682
* truncate it to the block boundary. */
683
bytes_to_write = size;
684
if (a->offset + bytes_to_write > block_end)
685
bytes_to_write = block_end - a->offset;
687
/* Seek if necessary to the specified offset. */
688
if (a->offset != a->fd_offset) {
689
if (lseek(a->fd, a->offset, SEEK_SET) < 0) {
690
archive_set_error(&a->archive, errno,
692
return (ARCHIVE_FATAL);
694
a->fd_offset = a->offset;
696
bytes_written = write(a->fd, buff, bytes_to_write);
697
if (bytes_written < 0) {
698
archive_set_error(&a->archive, errno, "Write failed");
699
return (ARCHIVE_WARN);
701
buff += bytes_written;
702
size -= bytes_written;
703
a->total_bytes_written += bytes_written;
704
a->offset += bytes_written;
705
a->fd_offset = a->offset;
707
return (start_size - size);
711
_archive_write_disk_data_block(struct archive *_a,
712
const void *buff, size_t size, int64_t offset)
714
struct archive_write_disk *a = (struct archive_write_disk *)_a;
717
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
718
ARCHIVE_STATE_DATA, "archive_write_data_block");
721
r = write_data_block(a, buff, size);
724
if ((size_t)r < size) {
725
archive_set_error(&a->archive, 0,
726
"Write request too large");
727
return (ARCHIVE_WARN);
733
_archive_write_disk_data(struct archive *_a, const void *buff, size_t size)
735
struct archive_write_disk *a = (struct archive_write_disk *)_a;
737
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
738
ARCHIVE_STATE_DATA, "archive_write_data");
740
return (write_data_block(a, buff, size));
744
_archive_write_disk_finish_entry(struct archive *_a)
746
struct archive_write_disk *a = (struct archive_write_disk *)_a;
747
int ret = ARCHIVE_OK;
749
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
750
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
751
"archive_write_finish_entry");
752
if (a->archive.state & ARCHIVE_STATE_HEADER)
754
archive_clear_error(&a->archive);
756
/* Pad or truncate file to the right size. */
758
/* There's no file. */
759
} else if (a->filesize < 0) {
760
/* File size is unknown, so we can't set the size. */
761
} else if (a->fd_offset == a->filesize) {
762
/* Last write ended at exactly the filesize; we're done. */
763
/* Hopefully, this is the common case. */
766
if (ftruncate(a->fd, a->filesize) == -1 &&
768
archive_set_error(&a->archive, errno,
769
"File size could not be restored");
770
return (ARCHIVE_FAILED);
774
* Not all platforms implement the XSI option to
775
* extend files via ftruncate. Stat() the file again
776
* to see what happened.
779
if ((ret = lazy_stat(a)) != ARCHIVE_OK)
781
/* We can use lseek()/write() to extend the file if
782
* ftruncate didn't work or isn't available. */
783
if (a->st.st_size < a->filesize) {
784
const char nul = '\0';
785
if (lseek(a->fd, a->filesize - 1, SEEK_SET) < 0) {
786
archive_set_error(&a->archive, errno,
788
return (ARCHIVE_FATAL);
790
if (write(a->fd, &nul, 1) < 0) {
791
archive_set_error(&a->archive, errno,
792
"Write to restore size failed");
793
return (ARCHIVE_FATAL);
799
/* Restore metadata. */
802
* Look up the "real" UID only if we're going to need it.
803
* TODO: the TODO_SGID condition can be dropped here, can't it?
805
if (a->todo & (TODO_OWNER | TODO_SUID | TODO_SGID)) {
806
a->uid = archive_write_disk_uid(&a->archive,
807
archive_entry_uname(a->entry),
808
archive_entry_uid(a->entry));
810
/* Look up the "real" GID only if we're going to need it. */
811
/* TODO: the TODO_SUID condition can be dropped here, can't it? */
812
if (a->todo & (TODO_OWNER | TODO_SGID | TODO_SUID)) {
813
a->gid = archive_write_disk_gid(&a->archive,
814
archive_entry_gname(a->entry),
815
archive_entry_gid(a->entry));
819
* Restore ownership before set_mode tries to restore suid/sgid
820
* bits. If we set the owner, we know what it is and can skip
821
* a stat() call to examine the ownership of the file on disk.
823
if (a->todo & TODO_OWNER)
824
ret = set_ownership(a);
827
* set_mode must precede ACLs on systems such as Solaris and
828
* FreeBSD where setting the mode implicitly clears extended ACLs
830
if (a->todo & TODO_MODE) {
831
int r2 = set_mode(a, a->mode);
832
if (r2 < ret) ret = r2;
836
* Security-related extended attributes (such as
837
* security.capability on Linux) have to be restored last,
838
* since they're implicitly removed by other file changes.
840
if (a->todo & TODO_XATTR) {
841
int r2 = set_xattrs(a);
842
if (r2 < ret) ret = r2;
846
* Some flags prevent file modification; they must be restored after
847
* file contents are written.
849
if (a->todo & TODO_FFLAGS) {
850
int r2 = set_fflags(a);
851
if (r2 < ret) ret = r2;
855
* Time must follow most other metadata;
856
* otherwise atime will get changed.
858
if (a->todo & TODO_TIMES) {
859
int r2 = set_times_from_entry(a);
860
if (r2 < ret) ret = r2;
864
* Mac extended metadata includes ACLs.
866
if (a->todo & TODO_MAC_METADATA) {
867
const void *metadata;
868
size_t metadata_size;
869
metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
870
if (metadata != NULL && metadata_size > 0) {
871
int r2 = set_mac_metadata(a, archive_entry_pathname(a->entry), metadata, metadata_size);
872
if (r2 < ret) ret = r2;
877
* ACLs must be restored after timestamps because there are
878
* ACLs that prevent attribute changes (including time).
880
if (a->todo & TODO_ACLS) {
881
int r2 = set_acls(a, a->fd,
882
archive_entry_pathname(a->entry),
883
archive_entry_acl(a->entry));
884
if (r2 < ret) ret = r2;
887
/* If there's an fd, we can close it now. */
892
/* If there's an entry, we can release it now. */
894
archive_entry_free(a->entry);
897
a->archive.state = ARCHIVE_STATE_HEADER;
902
archive_write_disk_set_group_lookup(struct archive *_a,
904
int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid),
905
void (*cleanup_gid)(void *private))
907
struct archive_write_disk *a = (struct archive_write_disk *)_a;
908
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
909
ARCHIVE_STATE_ANY, "archive_write_disk_set_group_lookup");
911
if (a->cleanup_gid != NULL && a->lookup_gid_data != NULL)
912
(a->cleanup_gid)(a->lookup_gid_data);
914
a->lookup_gid = lookup_gid;
915
a->cleanup_gid = cleanup_gid;
916
a->lookup_gid_data = private_data;
921
archive_write_disk_set_user_lookup(struct archive *_a,
923
int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid),
924
void (*cleanup_uid)(void *private))
926
struct archive_write_disk *a = (struct archive_write_disk *)_a;
927
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
928
ARCHIVE_STATE_ANY, "archive_write_disk_set_user_lookup");
930
if (a->cleanup_uid != NULL && a->lookup_uid_data != NULL)
931
(a->cleanup_uid)(a->lookup_uid_data);
933
a->lookup_uid = lookup_uid;
934
a->cleanup_uid = cleanup_uid;
935
a->lookup_uid_data = private_data;
940
archive_write_disk_gid(struct archive *_a, const char *name, int64_t id)
942
struct archive_write_disk *a = (struct archive_write_disk *)_a;
943
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
944
ARCHIVE_STATE_ANY, "archive_write_disk_gid");
946
return (a->lookup_gid)(a->lookup_gid_data, name, id);
951
archive_write_disk_uid(struct archive *_a, const char *name, int64_t id)
953
struct archive_write_disk *a = (struct archive_write_disk *)_a;
954
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
955
ARCHIVE_STATE_ANY, "archive_write_disk_uid");
957
return (a->lookup_uid)(a->lookup_uid_data, name, id);
962
* Create a new archive_write_disk object and initialize it with global state.
965
archive_write_disk_new(void)
967
struct archive_write_disk *a;
969
a = (struct archive_write_disk *)malloc(sizeof(*a));
972
memset(a, 0, sizeof(*a));
973
a->archive.magic = ARCHIVE_WRITE_DISK_MAGIC;
974
/* We're ready to write a header immediately. */
975
a->archive.state = ARCHIVE_STATE_HEADER;
976
a->archive.vtable = archive_write_disk_vtable();
977
a->start_time = time(NULL);
978
/* Query and restore the umask. */
979
umask(a->user_umask = umask(0));
981
a->user_uid = geteuid();
982
#endif /* HAVE_GETEUID */
983
if (archive_string_ensure(&a->path_safe, 512) == NULL) {
987
return (&a->archive);
992
* If pathname is longer than PATH_MAX, chdir to a suitable
993
* intermediate dir and edit the path down to a shorter suffix. Note
994
* that this routine never returns an error; if the chdir() attempt
995
* fails for any reason, we just go ahead with the long pathname. The
996
* object creation is likely to fail, but any error will get handled
999
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
1001
edit_deep_directories(struct archive_write_disk *a)
1004
char *tail = a->name;
1006
/* If path is short, avoid the open() below. */
1007
if (strlen(tail) <= PATH_MAX)
1010
/* Try to record our starting dir. */
1011
a->restore_pwd = open(".", O_RDONLY | O_BINARY);
1012
if (a->restore_pwd < 0)
1015
/* As long as the path is too long... */
1016
while (strlen(tail) > PATH_MAX) {
1017
/* Locate a dir prefix shorter than PATH_MAX. */
1018
tail += PATH_MAX - 8;
1019
while (tail > a->name && *tail != '/')
1021
/* Exit if we find a too-long path component. */
1022
if (tail <= a->name)
1024
/* Create the intermediate dir and chdir to it. */
1025
*tail = '\0'; /* Terminate dir portion */
1026
ret = create_dir(a, a->name);
1027
if (ret == ARCHIVE_OK && chdir(a->name) != 0)
1028
ret = ARCHIVE_FAILED;
1029
*tail = '/'; /* Restore the / we removed. */
1030
if (ret != ARCHIVE_OK)
1033
/* The chdir() succeeded; we've now shortened the path. */
1041
* The main restore function.
1044
restore_entry(struct archive_write_disk *a)
1046
int ret = ARCHIVE_OK, en;
1048
if (a->flags & ARCHIVE_EXTRACT_UNLINK && !S_ISDIR(a->mode)) {
1050
* TODO: Fix this. Apparently, there are platforms
1051
* that still allow root to hose the entire filesystem
1052
* by unlinking a dir. The S_ISDIR() test above
1053
* prevents us from using unlink() here if the new
1054
* object is a dir, but that doesn't mean the old
1055
* object isn't a dir.
1057
if (unlink(a->name) == 0) {
1058
/* We removed it, reset cached stat. */
1060
} else if (errno == ENOENT) {
1061
/* File didn't exist, that's just as good. */
1062
} else if (rmdir(a->name) == 0) {
1063
/* It was a dir, but now it's gone. */
1066
/* We tried, but couldn't get rid of it. */
1067
archive_set_error(&a->archive, errno,
1068
"Could not unlink");
1069
return(ARCHIVE_FAILED);
1073
/* Try creating it first; if this fails, we'll try to recover. */
1074
en = create_filesystem_object(a);
1076
if ((en == ENOTDIR || en == ENOENT)
1077
&& !(a->flags & ARCHIVE_EXTRACT_NO_AUTODIR)) {
1078
/* If the parent dir doesn't exist, try creating it. */
1079
create_parent_dir(a, a->name);
1080
/* Now try to create the object again. */
1081
en = create_filesystem_object(a);
1084
if ((en == EISDIR || en == EEXIST)
1085
&& (a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
1086
/* If we're not overwriting, we're done. */
1087
archive_entry_unset_size(a->entry);
1088
return (ARCHIVE_OK);
1092
* Some platforms return EISDIR if you call
1093
* open(O_WRONLY | O_EXCL | O_CREAT) on a directory, some
1094
* return EEXIST. POSIX is ambiguous, requiring EISDIR
1095
* for open(O_WRONLY) on a dir and EEXIST for open(O_EXCL | O_CREAT)
1096
* on an existing item.
1099
/* A dir is in the way of a non-dir, rmdir it. */
1100
if (rmdir(a->name) != 0) {
1101
archive_set_error(&a->archive, errno,
1102
"Can't remove already-existing dir");
1103
return (ARCHIVE_FAILED);
1107
en = create_filesystem_object(a);
1108
} else if (en == EEXIST) {
1110
* We know something is in the way, but we don't know what;
1111
* we need to find out before we go any further.
1115
* The SECURE_SYMLINKS logic has already removed a
1116
* symlink to a dir if the client wants that. So
1117
* follow the symlink if we're creating a dir.
1119
if (S_ISDIR(a->mode))
1120
r = stat(a->name, &a->st);
1122
* If it's not a dir (or it's a broken symlink),
1123
* then don't follow it.
1125
if (r != 0 || !S_ISDIR(a->mode))
1126
r = lstat(a->name, &a->st);
1128
archive_set_error(&a->archive, errno,
1129
"Can't stat existing object");
1130
return (ARCHIVE_FAILED);
1134
* NO_OVERWRITE_NEWER doesn't apply to directories.
1136
if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER)
1137
&& !S_ISDIR(a->st.st_mode)) {
1138
if (!older(&(a->st), a->entry)) {
1139
archive_entry_unset_size(a->entry);
1140
return (ARCHIVE_OK);
1144
/* If it's our archive, we're done. */
1145
if (a->skip_file_set &&
1146
a->st.st_dev == a->skip_file_dev &&
1147
a->st.st_ino == a->skip_file_ino) {
1148
archive_set_error(&a->archive, 0, "Refusing to overwrite archive");
1149
return (ARCHIVE_FAILED);
1152
if (!S_ISDIR(a->st.st_mode)) {
1153
/* A non-dir is in the way, unlink it. */
1154
if (unlink(a->name) != 0) {
1155
archive_set_error(&a->archive, errno,
1156
"Can't unlink already-existing object");
1157
return (ARCHIVE_FAILED);
1161
en = create_filesystem_object(a);
1162
} else if (!S_ISDIR(a->mode)) {
1163
/* A dir is in the way of a non-dir, rmdir it. */
1164
if (rmdir(a->name) != 0) {
1165
archive_set_error(&a->archive, errno,
1166
"Can't remove already-existing dir");
1167
return (ARCHIVE_FAILED);
1170
en = create_filesystem_object(a);
1173
* There's a dir in the way of a dir. Don't
1174
* waste time with rmdir()/mkdir(), just fix
1175
* up the permissions on the existing dir.
1176
* Note that we don't change perms on existing
1177
* dirs unless _EXTRACT_PERM is specified.
1179
if ((a->mode != a->st.st_mode)
1180
&& (a->todo & TODO_MODE_FORCE))
1181
a->deferred |= (a->todo & TODO_MODE);
1182
/* Ownership doesn't need deferred fixup. */
1183
en = 0; /* Forget the EEXIST. */
1188
/* Everything failed; give up here. */
1189
archive_set_error(&a->archive, en, "Can't create '%s'",
1191
return (ARCHIVE_FAILED);
1194
a->pst = NULL; /* Cached stat data no longer valid. */
1199
* Returns 0 if creation succeeds, or else returns errno value from
1200
* the failed system call. Note: This function should only ever perform
1201
* a single system call.
1204
create_filesystem_object(struct archive_write_disk *a)
1206
/* Create the entry. */
1207
const char *linkname;
1208
mode_t final_mode, mode;
1211
/* We identify hard/symlinks according to the link names. */
1212
/* Since link(2) and symlink(2) don't handle modes, we're done here. */
1213
linkname = archive_entry_hardlink(a->entry);
1214
if (linkname != NULL) {
1218
r = link(linkname, a->name) ? errno : 0;
1220
* New cpio and pax formats allow hardlink entries
1221
* to carry data, so we may have to open the file
1222
* for hardlink entries.
1224
* If the hardlink was successfully created and
1225
* the archive doesn't have carry data for it,
1226
* consider it to be non-authoritative for meta data.
1227
* This is consistent with GNU tar and BSD pax.
1228
* If the hardlink does carry data, let the last
1229
* archive entry decide ownership.
1231
if (r == 0 && a->filesize <= 0) {
1234
} else if (r == 0 && a->filesize > 0) {
1235
a->fd = open(a->name, O_WRONLY | O_TRUNC | O_BINARY);
1242
linkname = archive_entry_symlink(a->entry);
1243
if (linkname != NULL) {
1245
return symlink(linkname, a->name) ? errno : 0;
1252
* The remaining system calls all set permissions, so let's
1253
* try to take advantage of that to avoid an extra chmod()
1254
* call. (Recall that umask is set to zero right now!)
1257
/* Mode we want for the final restored object (w/o file type bits). */
1258
final_mode = a->mode & 07777;
1260
* The mode that will actually be restored in this step. Note
1261
* that SUID, SGID, etc, require additional work to ensure
1262
* security, so we never restore them at this point.
1264
mode = final_mode & 0777 & a->user_umask;
1266
switch (a->mode & AE_IFMT) {
1268
/* POSIX requires that we fall through here. */
1271
a->fd = open(a->name,
1272
O_WRONLY | O_CREAT | O_EXCL | O_BINARY, mode);
1277
/* Note: we use AE_IFCHR for the case label, and
1278
* S_IFCHR for the mknod() call. This is correct. */
1279
r = mknod(a->name, mode | S_IFCHR,
1280
archive_entry_rdev(a->entry));
1283
/* TODO: Find a better way to warn about our inability
1284
* to restore a char device node. */
1286
#endif /* HAVE_MKNOD */
1289
r = mknod(a->name, mode | S_IFBLK,
1290
archive_entry_rdev(a->entry));
1293
/* TODO: Find a better way to warn about our inability
1294
* to restore a block device node. */
1296
#endif /* HAVE_MKNOD */
1298
mode = (mode | MINIMUM_DIR_MODE) & MAXIMUM_DIR_MODE;
1299
r = mkdir(a->name, mode);
1301
/* Defer setting dir times. */
1302
a->deferred |= (a->todo & TODO_TIMES);
1303
a->todo &= ~TODO_TIMES;
1304
/* Never use an immediate chmod(). */
1305
/* We can't avoid the chmod() entirely if EXTRACT_PERM
1306
* because of SysV SGID inheritance. */
1307
if ((mode != final_mode)
1308
|| (a->flags & ARCHIVE_EXTRACT_PERM))
1309
a->deferred |= (a->todo & TODO_MODE);
1310
a->todo &= ~TODO_MODE;
1315
r = mkfifo(a->name, mode);
1318
/* TODO: Find a better way to warn about our inability
1319
* to restore a fifo. */
1321
#endif /* HAVE_MKFIFO */
1324
/* All the system calls above set errno on failure. */
1328
/* If we managed to set the final mode, we've avoided a chmod(). */
1329
if (mode == final_mode)
1330
a->todo &= ~TODO_MODE;
1335
* Cleanup function for archive_extract. Mostly, this involves processing
1336
* the fixup list, which is used to address a number of problems:
1337
* * Dir permissions might prevent us from restoring a file in that
1338
* dir, so we restore the dir with minimum 0700 permissions first,
1339
* then correct the mode at the end.
1340
* * Similarly, the act of restoring a file touches the directory
1341
* and changes the timestamp on the dir, so we have to touch-up dir
1342
* timestamps at the end as well.
1343
* * Some file flags can interfere with the restore by, for example,
1344
* preventing the creation of hardlinks to those files.
1345
* * Mac OS extended metadata includes ACLs, so must be deferred on dirs.
1347
* Note that tar/cpio do not require that archives be in a particular
1348
* order; there is no way to know when the last file has been restored
1349
* within a directory, so there's no way to optimize the memory usage
1350
* here by fixing up the directory any earlier than the
1353
* XXX TODO: Directory ACLs should be restored here, for the same
1354
* reason we set directory perms here. XXX
1357
_archive_write_disk_close(struct archive *_a)
1359
struct archive_write_disk *a = (struct archive_write_disk *)_a;
1360
struct fixup_entry *next, *p;
1363
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1364
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1365
"archive_write_disk_close");
1366
ret = _archive_write_disk_finish_entry(&a->archive);
1368
/* Sort dir list so directories are fixed up in depth-first order. */
1369
p = sort_dir_list(a->fixup_list);
1372
a->pst = NULL; /* Mark stat cache as out-of-date. */
1373
if (p->fixup & TODO_TIMES) {
1374
set_times(a, -1, p->mode, p->name,
1375
p->atime, p->atime_nanos,
1376
p->birthtime, p->birthtime_nanos,
1377
p->mtime, p->mtime_nanos,
1378
p->ctime, p->ctime_nanos);
1380
if (p->fixup & TODO_MODE_BASE)
1381
chmod(p->name, p->mode);
1382
if (p->fixup & TODO_ACLS)
1383
set_acls(a, -1, p->name, &p->acl);
1384
if (p->fixup & TODO_FFLAGS)
1385
set_fflags_platform(a, -1, p->name,
1386
p->mode, p->fflags_set, 0);
1387
if (p->fixup & TODO_MAC_METADATA)
1388
set_mac_metadata(a, p->name, p->mac_metadata,
1389
p->mac_metadata_size);
1391
archive_acl_clear(&p->acl);
1392
free(p->mac_metadata);
1397
a->fixup_list = NULL;
1402
_archive_write_disk_free(struct archive *_a)
1404
struct archive_write_disk *a;
1407
return (ARCHIVE_OK);
1408
archive_check_magic(_a, ARCHIVE_WRITE_DISK_MAGIC,
1409
ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_write_disk_free");
1410
a = (struct archive_write_disk *)_a;
1411
ret = _archive_write_disk_close(&a->archive);
1412
archive_write_disk_set_group_lookup(&a->archive, NULL, NULL, NULL);
1413
archive_write_disk_set_user_lookup(&a->archive, NULL, NULL, NULL);
1415
archive_entry_free(a->entry);
1416
archive_string_free(&a->_name_data);
1417
archive_string_free(&a->archive.error_string);
1418
archive_string_free(&a->path_safe);
1419
a->archive.magic = 0;
1420
__archive_clean(&a->archive);
1426
* Simple O(n log n) merge sort to order the fixup list. In
1427
* particular, we want to restore dir timestamps depth-first.
1429
static struct fixup_entry *
1430
sort_dir_list(struct fixup_entry *p)
1432
struct fixup_entry *a, *b, *t;
1436
/* A one-item list is already sorted. */
1437
if (p->next == NULL)
1440
/* Step 1: split the list. */
1444
/* Step a twice, t once. */
1450
/* Now, t is at the mid-point, so break the list here. */
1455
/* Step 2: Recursively sort the two sub-lists. */
1456
a = sort_dir_list(a);
1457
b = sort_dir_list(b);
1459
/* Step 3: Merge the returned lists. */
1460
/* Pick the first element for the merged list. */
1461
if (strcmp(a->name, b->name) > 0) {
1469
/* Always put the later element on the list first. */
1470
while (a != NULL && b != NULL) {
1471
if (strcmp(a->name, b->name) > 0) {
1481
/* Only one list is non-empty, so just splice it on. */
1491
* Returns a new, initialized fixup entry.
1493
* TODO: Reduce the memory requirements for this list by using a tree
1494
* structure rather than a simple list of names.
1496
static struct fixup_entry *
1497
new_fixup(struct archive_write_disk *a, const char *pathname)
1499
struct fixup_entry *fe;
1501
fe = (struct fixup_entry *)calloc(1, sizeof(struct fixup_entry));
1504
fe->next = a->fixup_list;
1507
fe->name = strdup(pathname);
1512
* Returns a fixup structure for the current entry.
1514
static struct fixup_entry *
1515
current_fixup(struct archive_write_disk *a, const char *pathname)
1517
if (a->current_fixup == NULL)
1518
a->current_fixup = new_fixup(a, pathname);
1519
return (a->current_fixup);
1522
/* TODO: Make this work. */
1524
* TODO: The deep-directory support bypasses this; disable deep directory
1525
* support if we're doing symlink checks.
1528
* TODO: Someday, integrate this with the deep dir support; they both
1529
* scan the path and both can be optimized by comparing against other
1532
/* TODO: Extend this to support symlinks on Windows Vista and later. */
1534
check_symlinks(struct archive_write_disk *a)
1536
#if !defined(HAVE_LSTAT)
1537
/* Platform doesn't have lstat, so we can't look for symlinks. */
1538
(void)a; /* UNUSED */
1539
return (ARCHIVE_OK);
1547
* Guard against symlink tricks. Reject any archive entry whose
1548
* destination would be altered by a symlink.
1550
/* Whatever we checked last time doesn't need to be re-checked. */
1552
if (archive_strlen(&(a->path_safe)) > 0) {
1553
char *p = a->path_safe.s;
1554
while ((*pn != '\0') && (*p == *pn))
1558
/* Keep going until we've checked the entire name. */
1559
while (pn[0] != '\0' && (pn[0] != '/' || pn[1] != '\0')) {
1560
/* Skip the next path element. */
1561
while (*pn != '\0' && *pn != '/')
1565
/* Check that we haven't hit a symlink. */
1566
r = lstat(a->name, &st);
1568
/* We've hit a dir that doesn't exist; stop now. */
1569
if (errno == ENOENT)
1571
} else if (S_ISLNK(st.st_mode)) {
1574
* Last element is symlink; remove it
1575
* so we can overwrite it with the
1576
* item being extracted.
1578
if (unlink(a->name)) {
1579
archive_set_error(&a->archive, errno,
1580
"Could not remove symlink %s",
1583
return (ARCHIVE_FAILED);
1587
* Even if we did remove it, a warning
1588
* is in order. The warning is silly,
1589
* though, if we're just replacing one
1590
* symlink with another symlink.
1592
if (!S_ISLNK(a->mode)) {
1593
archive_set_error(&a->archive, 0,
1594
"Removing symlink %s",
1597
/* Symlink gone. No more problem! */
1600
} else if (a->flags & ARCHIVE_EXTRACT_UNLINK) {
1601
/* User asked us to remove problems. */
1602
if (unlink(a->name) != 0) {
1603
archive_set_error(&a->archive, 0,
1604
"Cannot remove intervening symlink %s",
1607
return (ARCHIVE_FAILED);
1611
archive_set_error(&a->archive, 0,
1612
"Cannot extract through symlink %s",
1615
return (ARCHIVE_FAILED);
1620
/* We've checked and/or cleaned the whole path, so remember it. */
1621
archive_strcpy(&a->path_safe, a->name);
1622
return (ARCHIVE_OK);
1626
#if defined(__CYGWIN__)
1628
* 1. Convert a path separator from '\' to '/' .
1629
* We shouldn't check multibyte character directly because some
1630
* character-set have been using the '\' character for a part of
1631
* its multibyte character code.
1632
* 2. Replace unusable characters in Windows with underscore('_').
1633
* See also : http://msdn.microsoft.com/en-us/library/aa365247.aspx
1636
cleanup_pathname_win(struct archive_write_disk *a)
1641
int mb, complete, utf8;
1646
utf8 = (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)? 1: 0;
1647
for (p = a->name; *p != '\0'; p++) {
1650
/* If previous byte is smaller than 128,
1651
* this is not second byte of multibyte characters,
1652
* so we can replace '\' with '/'. */
1656
complete = 0;/* uncompleted. */
1657
} else if (*(unsigned char *)p > 127)
1661
/* Rewrite the path name if its next character is unusable. */
1662
if (*p == ':' || *p == '*' || *p == '?' || *p == '"' ||
1663
*p == '<' || *p == '>' || *p == '|')
1670
* Convert path separator in wide-character.
1673
while (*p != '\0' && alen) {
1674
l = mbtowc(&wc, p, alen);
1676
while (*p != '\0') {
1683
if (l == 1 && wc == L'\\')
1692
* Canonicalize the pathname. In particular, this strips duplicate
1693
* '/' characters, '.' elements, and trailing '/'. It also raises an
1694
* error for an empty path, a trailing '..' or (if _SECURE_NODOTDOT is
1695
* set) any '..' in the path.
1698
cleanup_pathname(struct archive_write_disk *a)
1701
char separator = '\0';
1703
dest = src = a->name;
1705
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1706
"Invalid empty pathname");
1707
return (ARCHIVE_FAILED);
1710
#if defined(__CYGWIN__)
1711
cleanup_pathname_win(a);
1713
/* Skip leading '/'. */
1717
/* Scan the pathname one element at a time. */
1719
/* src points to first char after '/' */
1720
if (src[0] == '\0') {
1722
} else if (src[0] == '/') {
1723
/* Found '//', ignore second one. */
1726
} else if (src[0] == '.') {
1727
if (src[1] == '\0') {
1728
/* Ignore trailing '.' */
1730
} else if (src[1] == '/') {
1734
} else if (src[1] == '.') {
1735
if (src[2] == '/' || src[2] == '\0') {
1736
/* Conditionally warn about '..' */
1737
if (a->flags & ARCHIVE_EXTRACT_SECURE_NODOTDOT) {
1738
archive_set_error(&a->archive,
1740
"Path contains '..'");
1741
return (ARCHIVE_FAILED);
1745
* Note: Under no circumstances do we
1746
* remove '..' elements. In
1747
* particular, restoring
1748
* '/foo/../bar/' should create the
1749
* 'foo' dir as a side-effect.
1754
/* Copy current element, including leading '/'. */
1757
while (*src != '\0' && *src != '/') {
1764
/* Skip '/' separator. */
1768
* We've just copied zero or more path elements, not including the
1771
if (dest == a->name) {
1773
* Nothing got copied. The path must have been something
1774
* like '.' or '/' or './' or '/././././/./'.
1781
/* Terminate the result. */
1783
return (ARCHIVE_OK);
1787
* Create the parent directory of the specified path, assuming path
1788
* is already in mutable storage.
1791
create_parent_dir(struct archive_write_disk *a, char *path)
1796
/* Remove tail element to obtain parent name. */
1797
slash = strrchr(path, '/');
1799
return (ARCHIVE_OK);
1801
r = create_dir(a, path);
1807
* Create the specified dir, recursing to create parents as necessary.
1809
* Returns ARCHIVE_OK if the path exists when we're done here.
1810
* Otherwise, returns ARCHIVE_FAILED.
1811
* Assumes path is in mutable storage; path is unchanged on exit.
1814
create_dir(struct archive_write_disk *a, char *path)
1817
struct fixup_entry *le;
1819
mode_t mode_final, mode;
1822
/* Check for special names and just skip them. */
1823
slash = strrchr(path, '/');
1829
if (base[0] == '\0' ||
1830
(base[0] == '.' && base[1] == '\0') ||
1831
(base[0] == '.' && base[1] == '.' && base[2] == '\0')) {
1832
/* Don't bother trying to create null path, '.', or '..'. */
1833
if (slash != NULL) {
1835
r = create_dir(a, path);
1839
return (ARCHIVE_OK);
1843
* Yes, this should be stat() and not lstat(). Using lstat()
1844
* here loses the ability to extract through symlinks. Also note
1845
* that this should not use the a->st cache.
1847
if (stat(path, &st) == 0) {
1848
if (S_ISDIR(st.st_mode))
1849
return (ARCHIVE_OK);
1850
if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
1851
archive_set_error(&a->archive, EEXIST,
1852
"Can't create directory '%s'", path);
1853
return (ARCHIVE_FAILED);
1855
if (unlink(path) != 0) {
1856
archive_set_error(&a->archive, errno,
1857
"Can't create directory '%s': "
1858
"Conflicting file cannot be removed",
1860
return (ARCHIVE_FAILED);
1862
} else if (errno != ENOENT && errno != ENOTDIR) {
1864
archive_set_error(&a->archive, errno, "Can't test directory '%s'", path);
1865
return (ARCHIVE_FAILED);
1866
} else if (slash != NULL) {
1868
r = create_dir(a, path);
1870
if (r != ARCHIVE_OK)
1875
* Mode we want for the final restored directory. Per POSIX,
1876
* implicitly-created dirs must be created obeying the umask.
1877
* There's no mention whether this is different for privileged
1878
* restores (which the rest of this code handles by pretending
1879
* umask=0). I've chosen here to always obey the user's umask for
1880
* implicit dirs, even if _EXTRACT_PERM was specified.
1882
mode_final = DEFAULT_DIR_MODE & ~a->user_umask;
1883
/* Mode we want on disk during the restore process. */
1885
mode |= MINIMUM_DIR_MODE;
1886
mode &= MAXIMUM_DIR_MODE;
1887
if (mkdir(path, mode) == 0) {
1888
if (mode != mode_final) {
1889
le = new_fixup(a, path);
1890
le->fixup |=TODO_MODE_BASE;
1891
le->mode = mode_final;
1893
return (ARCHIVE_OK);
1897
* Without the following check, a/b/../b/c/d fails at the
1898
* second visit to 'b', so 'd' can't be created. Note that we
1899
* don't add it to the fixup list here, as it's already been
1902
if (stat(path, &st) == 0 && S_ISDIR(st.st_mode))
1903
return (ARCHIVE_OK);
1905
archive_set_error(&a->archive, errno, "Failed to create dir '%s'",
1907
return (ARCHIVE_FAILED);
1911
* Note: Although we can skip setting the user id if the desired user
1912
* id matches the current user, we cannot skip setting the group, as
1913
* many systems set the gid based on the containing directory. So
1914
* we have to perform a chown syscall if we want to set the SGID
1915
* bit. (The alternative is to stat() and then possibly chown(); it's
1916
* more efficient to skip the stat() and just always chown().) Note
1917
* that a successful chown() here clears the TODO_SGID_CHECK bit, which
1918
* allows set_mode to skip the stat() check for the GID.
1921
set_ownership(struct archive_write_disk *a)
1924
/* unfortunately, on win32 there is no 'root' user with uid 0,
1925
so we just have to try the chown and see if it works */
1927
/* If we know we can't change it, don't bother trying. */
1928
if (a->user_uid != 0 && a->user_uid != a->uid) {
1929
archive_set_error(&a->archive, errno,
1930
"Can't set UID=%jd", (intmax_t)a->uid);
1931
return (ARCHIVE_WARN);
1936
/* If we have an fd, we can avoid a race. */
1937
if (a->fd >= 0 && fchown(a->fd, a->uid, a->gid) == 0) {
1938
/* We've set owner and know uid/gid are correct. */
1939
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
1940
return (ARCHIVE_OK);
1944
/* We prefer lchown() but will use chown() if that's all we have. */
1945
/* Of course, if we have neither, this will always fail. */
1947
if (lchown(a->name, a->uid, a->gid) == 0) {
1948
/* We've set owner and know uid/gid are correct. */
1949
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
1950
return (ARCHIVE_OK);
1953
if (!S_ISLNK(a->mode) && chown(a->name, a->uid, a->gid) == 0) {
1954
/* We've set owner and know uid/gid are correct. */
1955
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
1956
return (ARCHIVE_OK);
1960
archive_set_error(&a->archive, errno,
1961
"Can't set user=%jd/group=%jd for %s",
1962
(intmax_t)a->uid, (intmax_t)a->gid, a->name);
1963
return (ARCHIVE_WARN);
1967
* Note: Returns 0 on success, non-zero on failure.
1970
set_time(int fd, int mode, const char *name,
1971
time_t atime, long atime_nsec,
1972
time_t mtime, long mtime_nsec)
1974
/* Select the best implementation for this platform. */
1975
#if defined(HAVE_UTIMENSAT) && defined(HAVE_FUTIMENS)
1977
* utimensat() and futimens() are defined in
1978
* POSIX.1-2008. They support ns resolution and setting times
1979
* on fds and symlinks.
1981
struct timespec ts[2];
1982
ts[0].tv_sec = atime;
1983
ts[0].tv_nsec = atime_nsec;
1984
ts[1].tv_sec = mtime;
1985
ts[1].tv_nsec = mtime_nsec;
1987
return futimens(fd, ts);
1988
return utimensat(AT_FDCWD, name, ts, AT_SYMLINK_NOFOLLOW);
1992
* The utimes()-family functions support µs-resolution and
1993
* setting times fds and symlinks. utimes() is documented as
1994
* LEGACY by POSIX, futimes() and lutimes() are not described
1997
struct timeval times[2];
1999
times[0].tv_sec = atime;
2000
times[0].tv_usec = atime_nsec / 1000;
2001
times[1].tv_sec = mtime;
2002
times[1].tv_usec = mtime_nsec / 1000;
2006
return (futimes(fd, times));
2008
(void)fd; /* UNUSED */
2011
(void)mode; /* UNUSED */
2012
return (lutimes(name, times));
2016
return (utimes(name, times));
2019
#elif defined(HAVE_UTIME)
2021
* utime() is POSIX-standard but only supports 1s resolution and
2022
* does not support fds or symlinks.
2024
struct utimbuf times;
2025
(void)fd; /* UNUSED */
2026
(void)name; /* UNUSED */
2027
(void)atime_nsec; /* UNUSED */
2028
(void)mtime_nsec; /* UNUSED */
2029
times.actime = atime;
2030
times.modtime = mtime;
2032
return (ARCHIVE_OK);
2033
return (utime(name, ×));
2037
* We don't know how to set the time on this platform.
2039
return (ARCHIVE_WARN);
2043
#ifdef F_SETTIMES /* Tru64 */
2045
set_time_tru64(int fd, int mode, const char *name,
2046
time_t atime, long atime_nsec,
2047
time_t mtime, long mtime_nsec,
2048
time_t ctime, long ctime_nsec)
2050
struct attr_timbuf tstamp;
2051
struct timeval times[3];
2052
times[0].tv_sec = atime;
2053
times[0].tv_usec = atime_nsec / 1000;
2054
times[1].tv_sec = mtime;
2055
times[1].tv_usec = mtime_nsec / 1000;
2056
times[2].tv_sec = ctime;
2057
times[2].tv_usec = ctime_nsec / 1000;
2058
tstamp.atime = times[0];
2059
tstamp.mtime = times[1];
2060
tstamp.ctime = times[2];
2061
return (fcntl(fd,F_SETTIMES,&tstamp));
2066
set_times(struct archive_write_disk *a,
2067
int fd, int mode, const char *name,
2068
time_t atime, long atime_nanos,
2069
time_t birthtime, long birthtime_nanos,
2070
time_t mtime, long mtime_nanos,
2071
time_t ctime, long ctime_nanos)
2073
/* Note: set_time doesn't use libarchive return conventions!
2074
* It uses syscall conventions. So 0 here instead of ARCHIVE_OK. */
2079
* on Tru64 try own fcntl first which can restore even the
2080
* ctime, fall back to default code path below if it fails
2081
* or if we are not running as root
2083
if (a->user_uid == 0 &&
2084
set_time_tru64(fd, mode, name,
2085
atime, atime_nanos, mtime,
2086
mtime_nanos, ctime, ctime_nanos) == 0) {
2087
return (ARCHIVE_OK);
2091
#ifdef HAVE_STRUCT_STAT_ST_BIRTHTIME
2093
* If you have struct stat.st_birthtime, we assume BSD
2094
* birthtime semantics, in which {f,l,}utimes() updates
2095
* birthtime to earliest mtime. So we set the time twice,
2096
* first using the birthtime, then using the mtime. If
2097
* birthtime == mtime, this isn't necessary, so we skip it.
2098
* If birthtime > mtime, then this won't work, so we skip it.
2100
if (birthtime < mtime
2101
|| (birthtime == mtime && birthtime_nanos < mtime_nanos))
2102
r1 = set_time(fd, mode, name,
2104
birthtime, birthtime_nanos);
2106
r2 = set_time(fd, mode, name,
2108
mtime, mtime_nanos);
2109
if (r1 != 0 || r2 != 0) {
2110
archive_set_error(&a->archive, errno,
2111
"Can't restore time");
2112
return (ARCHIVE_WARN);
2114
return (ARCHIVE_OK);
2118
set_times_from_entry(struct archive_write_disk *a)
2120
time_t atime, birthtime, mtime, ctime;
2121
long atime_nsec, birthtime_nsec, mtime_nsec, ctime_nsec;
2123
/* Suitable defaults. */
2124
atime = birthtime = mtime = ctime = a->start_time;
2125
atime_nsec = birthtime_nsec = mtime_nsec = ctime_nsec = 0;
2127
/* If no time was provided, we're done. */
2128
if (!archive_entry_atime_is_set(a->entry)
2129
#if HAVE_STRUCT_STAT_ST_BIRTHTIME
2130
&& !archive_entry_birthtime_is_set(a->entry)
2132
&& !archive_entry_mtime_is_set(a->entry))
2133
return (ARCHIVE_OK);
2135
if (archive_entry_atime_is_set(a->entry)) {
2136
atime = archive_entry_atime(a->entry);
2137
atime_nsec = archive_entry_atime_nsec(a->entry);
2139
if (archive_entry_birthtime_is_set(a->entry)) {
2140
birthtime = archive_entry_birthtime(a->entry);
2141
birthtime_nsec = archive_entry_birthtime_nsec(a->entry);
2143
if (archive_entry_mtime_is_set(a->entry)) {
2144
mtime = archive_entry_mtime(a->entry);
2145
mtime_nsec = archive_entry_mtime_nsec(a->entry);
2147
if (archive_entry_ctime_is_set(a->entry)) {
2148
ctime = archive_entry_ctime(a->entry);
2149
ctime_nsec = archive_entry_ctime_nsec(a->entry);
2152
return set_times(a, a->fd, a->mode, a->name,
2154
birthtime, birthtime_nsec,
2160
set_mode(struct archive_write_disk *a, int mode)
2163
mode &= 07777; /* Strip off file type bits. */
2165
if (a->todo & TODO_SGID_CHECK) {
2167
* If we don't know the GID is right, we must stat()
2168
* to verify it. We can't just check the GID of this
2169
* process, since systems sometimes set GID from
2170
* the enclosing dir or based on ACLs.
2172
if ((r = lazy_stat(a)) != ARCHIVE_OK)
2174
if (a->pst->st_gid != a->gid) {
2176
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
2178
* This is only an error if you
2179
* requested owner restore. If you
2180
* didn't, we'll try to restore
2181
* sgid/suid, but won't consider it a
2182
* problem if we can't.
2184
archive_set_error(&a->archive, -1,
2185
"Can't restore SGID bit");
2189
/* While we're here, double-check the UID. */
2190
if (a->pst->st_uid != a->uid
2191
&& (a->todo & TODO_SUID)) {
2193
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
2194
archive_set_error(&a->archive, -1,
2195
"Can't restore SUID bit");
2199
a->todo &= ~TODO_SGID_CHECK;
2200
a->todo &= ~TODO_SUID_CHECK;
2201
} else if (a->todo & TODO_SUID_CHECK) {
2203
* If we don't know the UID is right, we can just check
2204
* the user, since all systems set the file UID from
2207
if (a->user_uid != a->uid) {
2209
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
2210
archive_set_error(&a->archive, -1,
2211
"Can't make file SUID");
2215
a->todo &= ~TODO_SUID_CHECK;
2218
if (S_ISLNK(a->mode)) {
2221
* If this is a symlink, use lchmod(). If the
2222
* platform doesn't support lchmod(), just skip it. A
2223
* platform that doesn't provide a way to set
2224
* permissions on symlinks probably ignores
2225
* permissions on symlinks, so a failure here has no
2228
if (lchmod(a->name, mode) != 0) {
2229
archive_set_error(&a->archive, errno,
2230
"Can't set permissions to 0%o", (int)mode);
2234
} else if (!S_ISDIR(a->mode)) {
2236
* If it's not a symlink and not a dir, then use
2237
* fchmod() or chmod(), depending on whether we have
2238
* an fd. Dirs get their perms set during the
2239
* post-extract fixup, which is handled elsewhere.
2243
if (fchmod(a->fd, mode) != 0) {
2244
archive_set_error(&a->archive, errno,
2245
"Can't set permissions to 0%o", (int)mode);
2250
/* If this platform lacks fchmod(), then
2251
* we'll just use chmod(). */
2252
if (chmod(a->name, mode) != 0) {
2253
archive_set_error(&a->archive, errno,
2254
"Can't set permissions to 0%o", (int)mode);
2262
set_fflags(struct archive_write_disk *a)
2264
struct fixup_entry *le;
2265
unsigned long set, clear;
2268
mode_t mode = archive_entry_mode(a->entry);
2271
* Make 'critical_flags' hold all file flags that can't be
2272
* immediately restored. For example, on BSD systems,
2273
* SF_IMMUTABLE prevents hardlinks from being created, so
2274
* should not be set until after any hardlinks are created. To
2275
* preserve some semblance of portability, this uses #ifdef
2276
* extensively. Ugly, but it works.
2278
* Yes, Virginia, this does create a security race. It's mitigated
2279
* somewhat by the practice of creating dirs 0700 until the extract
2280
* is done, but it would be nice if we could do more than that.
2281
* People restoring critical file systems should be wary of
2282
* other programs that might try to muck with files as they're
2285
/* Hopefully, the compiler will optimize this mess into a constant. */
2288
critical_flags |= SF_IMMUTABLE;
2291
critical_flags |= UF_IMMUTABLE;
2294
critical_flags |= SF_APPEND;
2297
critical_flags |= UF_APPEND;
2299
#ifdef EXT2_APPEND_FL
2300
critical_flags |= EXT2_APPEND_FL;
2302
#ifdef EXT2_IMMUTABLE_FL
2303
critical_flags |= EXT2_IMMUTABLE_FL;
2306
if (a->todo & TODO_FFLAGS) {
2307
archive_entry_fflags(a->entry, &set, &clear);
2310
* The first test encourages the compiler to eliminate
2311
* all of this if it's not necessary.
2313
if ((critical_flags != 0) && (set & critical_flags)) {
2314
le = current_fixup(a, a->name);
2315
le->fixup |= TODO_FFLAGS;
2316
le->fflags_set = set;
2317
/* Store the mode if it's not already there. */
2318
if ((le->fixup & TODO_MODE) == 0)
2321
r = set_fflags_platform(a, a->fd,
2322
a->name, mode, set, clear);
2323
if (r != ARCHIVE_OK)
2327
return (ARCHIVE_OK);
2331
#if ( defined(HAVE_LCHFLAGS) || defined(HAVE_CHFLAGS) || defined(HAVE_FCHFLAGS) ) && defined(HAVE_STRUCT_STAT_ST_FLAGS)
2333
* BSD reads flags using stat() and sets them with one of {f,l,}chflags()
2336
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
2337
mode_t mode, unsigned long set, unsigned long clear)
2341
(void)mode; /* UNUSED */
2342
if (set == 0 && clear == 0)
2343
return (ARCHIVE_OK);
2346
* XXX Is the stat here really necessary? Or can I just use
2347
* the 'set' flags directly? In particular, I'm not sure
2348
* about the correct approach if we're overwriting an existing
2349
* file that already has flags on it. XXX
2351
if ((r = lazy_stat(a)) != ARCHIVE_OK)
2354
a->st.st_flags &= ~clear;
2355
a->st.st_flags |= set;
2356
#ifdef HAVE_FCHFLAGS
2357
/* If platform has fchflags() and we were given an fd, use it. */
2358
if (fd >= 0 && fchflags(fd, a->st.st_flags) == 0)
2359
return (ARCHIVE_OK);
2362
* If we can't use the fd to set the flags, we'll use the
2363
* pathname to set flags. We prefer lchflags() but will use
2364
* chflags() if we must.
2366
#ifdef HAVE_LCHFLAGS
2367
if (lchflags(name, a->st.st_flags) == 0)
2368
return (ARCHIVE_OK);
2369
#elif defined(HAVE_CHFLAGS)
2370
if (S_ISLNK(a->st.st_mode)) {
2371
archive_set_error(&a->archive, errno,
2372
"Can't set file flags on symlink.");
2373
return (ARCHIVE_WARN);
2375
if (chflags(name, a->st.st_flags) == 0)
2376
return (ARCHIVE_OK);
2378
archive_set_error(&a->archive, errno,
2379
"Failed to set file flags");
2380
return (ARCHIVE_WARN);
2383
#elif defined(EXT2_IOC_GETFLAGS) && defined(EXT2_IOC_SETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS)
2385
* Linux uses ioctl() to read and write file flags.
2388
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
2389
mode_t mode, unsigned long set, unsigned long clear)
2393
unsigned long newflags, oldflags;
2394
unsigned long sf_mask = 0;
2396
if (set == 0 && clear == 0)
2397
return (ARCHIVE_OK);
2398
/* Only regular files and dirs can have flags. */
2399
if (!S_ISREG(mode) && !S_ISDIR(mode))
2400
return (ARCHIVE_OK);
2402
/* If we weren't given an fd, open it ourselves. */
2404
myfd = open(name, O_RDONLY | O_NONBLOCK | O_BINARY);
2406
return (ARCHIVE_OK);
2409
* Linux has no define for the flags that are only settable by
2410
* the root user. This code may seem a little complex, but
2411
* there seem to be some Linux systems that lack these
2412
* defines. (?) The code below degrades reasonably gracefully
2413
* if sf_mask is incomplete.
2415
#ifdef EXT2_IMMUTABLE_FL
2416
sf_mask |= EXT2_IMMUTABLE_FL;
2418
#ifdef EXT2_APPEND_FL
2419
sf_mask |= EXT2_APPEND_FL;
2422
* XXX As above, this would be way simpler if we didn't have
2423
* to read the current flags from disk. XXX
2427
/* Read the current file flags. */
2428
if (ioctl(myfd, EXT2_IOC_GETFLAGS, &oldflags) < 0)
2431
/* Try setting the flags as given. */
2432
newflags = (oldflags & ~clear) | set;
2433
if (ioctl(myfd, EXT2_IOC_SETFLAGS, &newflags) >= 0)
2438
/* If we couldn't set all the flags, try again with a subset. */
2439
newflags &= ~sf_mask;
2440
oldflags &= sf_mask;
2441
newflags |= oldflags;
2442
if (ioctl(myfd, EXT2_IOC_SETFLAGS, &newflags) >= 0)
2445
/* We couldn't set the flags, so report the failure. */
2447
archive_set_error(&a->archive, errno,
2448
"Failed to set file flags");
2459
* Of course, some systems have neither BSD chflags() nor Linux' flags
2460
* support through ioctl().
2463
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
2464
mode_t mode, unsigned long set, unsigned long clear)
2466
(void)a; /* UNUSED */
2467
(void)fd; /* UNUSED */
2468
(void)name; /* UNUSED */
2469
(void)mode; /* UNUSED */
2470
(void)set; /* UNUSED */
2471
(void)clear; /* UNUSED */
2472
return (ARCHIVE_OK);
2475
#endif /* __linux */
2477
#ifndef HAVE_COPYFILE_H
2478
/* Default is to simply drop Mac extended metadata. */
2480
set_mac_metadata(struct archive_write_disk *a, const char *pathname,
2481
const void *metadata, size_t metadata_size)
2483
(void)a; /* UNUSED */
2484
(void)pathname; /* UNUSED */
2485
(void)metadata; /* UNUSED */
2486
(void)metadata_size; /* UNUSED */
2487
return (ARCHIVE_OK);
2492
* On Mac OS, we use copyfile() to unpack the metadata and
2493
* apply it to the target file.
2496
set_mac_metadata(struct archive_write_disk *a, const char *pathname,
2497
const void *metadata, size_t metadata_size)
2499
struct archive_string tmp;
2502
int ret = ARCHIVE_OK;
2504
/* This would be simpler if copyfile() could just accept the
2505
* metadata as a block of memory; then we could sidestep this
2506
* silly dance of writing the data to disk just so that
2507
* copyfile() can read it back in again. */
2508
archive_string_init(&tmp);
2509
archive_strcpy(&tmp, pathname);
2510
archive_strcat(&tmp, ".XXXXXX");
2511
fd = mkstemp(tmp.s);
2514
archive_set_error(&a->archive, errno,
2515
"Failed to restore metadata");
2516
return (ARCHIVE_WARN);
2518
written = write(fd, metadata, metadata_size);
2520
if (written != metadata_size
2521
|| copyfile(tmp.s, pathname, 0,
2522
COPYFILE_UNPACK | COPYFILE_NOFOLLOW
2523
| COPYFILE_ACL | COPYFILE_XATTR)) {
2524
archive_set_error(&a->archive, errno,
2525
"Failed to restore metadata");
2533
#ifndef HAVE_POSIX_ACL
2534
/* Default empty function body to satisfy mainline code. */
2536
set_acls(struct archive_write_disk *a, int fd, const char *name,
2537
struct archive_acl *acl)
2539
(void)a; /* UNUSED */
2540
(void)fd; /* UNUSED */
2541
(void)name; /* UNUSED */
2542
(void)acl; /* UNUSED */
2543
return (ARCHIVE_OK);
2549
* XXX TODO: What about ACL types other than ACCESS and DEFAULT?
2552
set_acls(struct archive_write_disk *a, int fd, const char *name,
2553
struct archive_acl *abstract_acl)
2557
ret = set_acl(a, fd, name, abstract_acl, ACL_TYPE_ACCESS,
2558
ARCHIVE_ENTRY_ACL_TYPE_ACCESS, "access");
2559
if (ret != ARCHIVE_OK)
2561
ret = set_acl(a, fd, name, abstract_acl, ACL_TYPE_DEFAULT,
2562
ARCHIVE_ENTRY_ACL_TYPE_DEFAULT, "default");
2568
set_acl(struct archive_write_disk *a, int fd, const char *name,
2569
struct archive_acl *abstract_acl,
2570
acl_type_t acl_type, int ae_requested_type, const char *tname)
2573
acl_entry_t acl_entry;
2574
acl_permset_t acl_permset;
2576
int ae_type, ae_permset, ae_tag, ae_id;
2579
const char *ae_name;
2583
entries = archive_acl_reset(abstract_acl, ae_requested_type);
2585
return (ARCHIVE_OK);
2586
acl = acl_init(entries);
2587
while (archive_acl_next(&a->archive, abstract_acl,
2588
ae_requested_type, &ae_type, &ae_permset, &ae_tag, &ae_id,
2589
&ae_name) == ARCHIVE_OK) {
2590
acl_create_entry(&acl, &acl_entry);
2593
case ARCHIVE_ENTRY_ACL_USER:
2594
acl_set_tag_type(acl_entry, ACL_USER);
2595
ae_uid = archive_write_disk_uid(&a->archive,
2597
acl_set_qualifier(acl_entry, &ae_uid);
2599
case ARCHIVE_ENTRY_ACL_GROUP:
2600
acl_set_tag_type(acl_entry, ACL_GROUP);
2601
ae_gid = archive_write_disk_gid(&a->archive,
2603
acl_set_qualifier(acl_entry, &ae_gid);
2605
case ARCHIVE_ENTRY_ACL_USER_OBJ:
2606
acl_set_tag_type(acl_entry, ACL_USER_OBJ);
2608
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
2609
acl_set_tag_type(acl_entry, ACL_GROUP_OBJ);
2611
case ARCHIVE_ENTRY_ACL_MASK:
2612
acl_set_tag_type(acl_entry, ACL_MASK);
2614
case ARCHIVE_ENTRY_ACL_OTHER:
2615
acl_set_tag_type(acl_entry, ACL_OTHER);
2622
acl_get_permset(acl_entry, &acl_permset);
2623
acl_clear_perms(acl_permset);
2624
if (ae_permset & ARCHIVE_ENTRY_ACL_EXECUTE)
2625
acl_add_perm(acl_permset, ACL_EXECUTE);
2626
if (ae_permset & ARCHIVE_ENTRY_ACL_WRITE)
2627
acl_add_perm(acl_permset, ACL_WRITE);
2628
if (ae_permset & ARCHIVE_ENTRY_ACL_READ)
2629
acl_add_perm(acl_permset, ACL_READ);
2632
/* Try restoring the ACL through 'fd' if we can. */
2634
if (fd >= 0 && acl_type == ACL_TYPE_ACCESS && acl_set_fd(fd, acl) == 0)
2638
#if HAVE_ACL_SET_FD_NP
2639
if (fd >= 0 && acl_set_fd_np(fd, acl, acl_type) == 0)
2644
if (acl_set_file(name, acl_type, acl) != 0) {
2645
archive_set_error(&a->archive, errno, "Failed to set %s acl", tname);
2653
#if HAVE_LSETXATTR || HAVE_LSETEA
2655
* Restore extended attributes - Linux and AIX implementations:
2656
* AIX' ea interface is syntaxwise identical to the Linux xattr interface.
2659
set_xattrs(struct archive_write_disk *a)
2661
struct archive_entry *entry = a->entry;
2662
static int warning_done = 0;
2663
int ret = ARCHIVE_OK;
2664
int i = archive_entry_xattr_reset(entry);
2670
archive_entry_xattr_next(entry, &name, &value, &size);
2672
strncmp(name, "xfsroot.", 8) != 0 &&
2673
strncmp(name, "system.", 7) != 0) {
2677
e = fsetxattr(a->fd, name, value, size, 0);
2681
e = fsetea(a->fd, name, value, size, 0);
2686
e = lsetxattr(archive_entry_pathname(entry),
2687
name, value, size, 0);
2689
e = lsetea(archive_entry_pathname(entry),
2690
name, value, size, 0);
2694
if (errno == ENOTSUP || errno == ENOSYS) {
2695
if (!warning_done) {
2697
archive_set_error(&a->archive, errno,
2698
"Cannot restore extended "
2699
"attributes on this file "
2703
archive_set_error(&a->archive, errno,
2704
"Failed to set extended attribute");
2708
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2709
"Invalid extended attribute encountered");
2715
#elif HAVE_EXTATTR_SET_FILE && HAVE_DECL_EXTATTR_NAMESPACE_USER
2717
* Restore extended attributes - FreeBSD implementation
2720
set_xattrs(struct archive_write_disk *a)
2722
struct archive_entry *entry = a->entry;
2723
static int warning_done = 0;
2724
int ret = ARCHIVE_OK;
2725
int i = archive_entry_xattr_reset(entry);
2731
archive_entry_xattr_next(entry, &name, &value, &size);
2736
if (strncmp(name, "user.", 5) == 0) {
2737
/* "user." attributes go to user namespace */
2739
namespace = EXTATTR_NAMESPACE_USER;
2741
/* Warn about other extended attributes. */
2742
archive_set_error(&a->archive,
2743
ARCHIVE_ERRNO_FILE_FORMAT,
2744
"Can't restore extended attribute ``%s''",
2750
#if HAVE_EXTATTR_SET_FD
2752
e = extattr_set_fd(a->fd, namespace, name, value, size);
2755
/* TODO: should we use extattr_set_link() instead? */
2757
e = extattr_set_file(archive_entry_pathname(entry),
2758
namespace, name, value, size);
2760
if (e != (int)size) {
2761
if (errno == ENOTSUP || errno == ENOSYS) {
2762
if (!warning_done) {
2764
archive_set_error(&a->archive, errno,
2765
"Cannot restore extended "
2766
"attributes on this file "
2770
archive_set_error(&a->archive, errno,
2771
"Failed to set extended attribute");
2782
* Restore extended attributes - stub implementation for unsupported systems
2785
set_xattrs(struct archive_write_disk *a)
2787
static int warning_done = 0;
2789
/* If there aren't any extended attributes, then it's okay not
2790
* to extract them, otherwise, issue a single warning. */
2791
if (archive_entry_xattr_count(a->entry) != 0 && !warning_done) {
2793
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2794
"Cannot restore extended attributes on this system");
2795
return (ARCHIVE_WARN);
2797
/* Warning was already emitted; suppress further warnings. */
2798
return (ARCHIVE_OK);
2803
* Test if file on disk is older than entry.
2806
older(struct stat *st, struct archive_entry *entry)
2808
/* First, test the seconds and return if we have a definite answer. */
2809
/* Definitely older. */
2810
if (st->st_mtime < archive_entry_mtime(entry))
2812
/* Definitely younger. */
2813
if (st->st_mtime > archive_entry_mtime(entry))
2815
/* If this platform supports fractional seconds, try those. */
2816
#if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
2817
/* Definitely older. */
2818
if (st->st_mtimespec.tv_nsec < archive_entry_mtime_nsec(entry))
2820
#elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
2821
/* Definitely older. */
2822
if (st->st_mtim.tv_nsec < archive_entry_mtime_nsec(entry))
2824
#elif HAVE_STRUCT_STAT_ST_MTIME_N
2826
if (st->st_mtime_n < archive_entry_mtime_nsec(entry))
2828
#elif HAVE_STRUCT_STAT_ST_UMTIME
2830
if (st->st_umtime * 1000 < archive_entry_mtime_nsec(entry))
2832
#elif HAVE_STRUCT_STAT_ST_MTIME_USEC
2834
if (st->st_mtime_usec * 1000 < archive_entry_mtime_nsec(entry))
2837
/* This system doesn't have high-res timestamps. */
2839
/* Same age or newer, so not older. */
2843
#endif /* !_WIN32 || __CYGWIN__ */
added
removed
libarchive/archive_write_disk_posix.c
