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archive_write_disk_posix.c
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archive_write_disk_posix.c
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/*-
* Copyright (c) 2003-2010 Tim Kientzle
* Copyright (c) 2012 Michihiro NAKAJIMA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "archive_platform.h"
#if !defined(_WIN32) || defined(__CYGWIN__)
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_ACL_H
#include <sys/acl.h>
#endif
#ifdef HAVE_SYS_EXTATTR_H
#include <sys/extattr.h>
#endif
#if HAVE_SYS_XATTR_H
#include <sys/xattr.h>
#elif HAVE_ATTR_XATTR_H
#include <attr/xattr.h>
#endif
#ifdef HAVE_SYS_EA_H
#include <sys/ea.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_UTIME_H
#include <sys/utime.h>
#endif
#ifdef HAVE_COPYFILE_H
#include <copyfile.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#endif
#ifdef HAVE_LINUX_FS_H
#include <linux/fs.h> /* for Linux file flags */
#endif
/*
* Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
* As the include guards don't agree, the order of include is important.
*/
#ifdef HAVE_LINUX_EXT2_FS_H
#include <linux/ext2_fs.h> /* for Linux file flags */
#endif
#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
#include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef F_GETTIMES /* Tru64 specific */
#include <sys/fcntl1.h>
#endif
/*
* Macro to cast st_mtime and time_t to an int64 so that 2 numbers can reliably be compared.
*
* It assumes that the input is an integer type of no more than 64 bits.
* If the number is less than zero, t must be a signed type, so it fits in
* int64_t. Otherwise, it's a nonnegative value so we can cast it to uint64_t
* without loss. But it could be a large unsigned value, so we have to clip it
* to INT64_MAX.*
*/
#define to_int64_time(t) \
((t) < 0 ? (int64_t)(t) : (uint64_t)(t) > (uint64_t)INT64_MAX ? INT64_MAX : (int64_t)(t))
#if __APPLE__
#include <TargetConditionals.h>
#if TARGET_OS_MAC && !TARGET_OS_EMBEDDED && HAVE_QUARANTINE_H
#include <quarantine.h>
#define HAVE_QUARANTINE 1
#endif
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
/* TODO: Support Mac OS 'quarantine' feature. This is really just a
* standard tag to mark files that have been downloaded as "tainted".
* On Mac OS, we should mark the extracted files as tainted if the
* archive being read was tainted. Windows has a similar feature; we
* should investigate ways to support this generically. */
#include "archive.h"
#include "archive_acl_private.h"
#include "archive_string.h"
#include "archive_endian.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_write_disk_private.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
/* Ignore non-int O_NOFOLLOW constant. */
/* gnulib's fcntl.h does this on AIX, but it seems practical everywhere */
#if defined O_NOFOLLOW && !(INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
#undef O_NOFOLLOW
#endif
#ifndef O_NOFOLLOW
#define O_NOFOLLOW 0
#endif
#ifndef AT_FDCWD
#define AT_FDCWD -100
#endif
struct fixup_entry {
struct fixup_entry *next;
struct archive_acl acl;
mode_t mode;
__LA_MODE_T filetype;
int64_t atime;
int64_t birthtime;
int64_t mtime;
int64_t ctime;
unsigned long atime_nanos;
unsigned long birthtime_nanos;
unsigned long mtime_nanos;
unsigned long ctime_nanos;
unsigned long fflags_set;
size_t mac_metadata_size;
void *mac_metadata;
int fixup; /* bitmask of what needs fixing */
char *name;
};
/*
* We use a bitmask to track which operations remain to be done for
* this file. In particular, this helps us avoid unnecessary
* operations when it's possible to take care of one step as a
* side-effect of another. For example, mkdir() can specify the mode
* for the newly-created object but symlink() cannot. This means we
* can skip chmod() if mkdir() succeeded, but we must explicitly
* chmod() if we're trying to create a directory that already exists
* (mkdir() failed) or if we're restoring a symlink. Similarly, we
* need to verify UID/GID before trying to restore SUID/SGID bits;
* that verification can occur explicitly through a stat() call or
* implicitly because of a successful chown() call.
*/
#define TODO_MODE_FORCE 0x40000000
#define TODO_MODE_BASE 0x20000000
#define TODO_SUID 0x10000000
#define TODO_SUID_CHECK 0x08000000
#define TODO_SGID 0x04000000
#define TODO_SGID_CHECK 0x02000000
#define TODO_APPLEDOUBLE 0x01000000
#define TODO_MODE (TODO_MODE_BASE|TODO_SUID|TODO_SGID)
#define TODO_TIMES ARCHIVE_EXTRACT_TIME
#define TODO_OWNER ARCHIVE_EXTRACT_OWNER
#define TODO_FFLAGS ARCHIVE_EXTRACT_FFLAGS
#define TODO_ACLS ARCHIVE_EXTRACT_ACL
#define TODO_XATTR ARCHIVE_EXTRACT_XATTR
#define TODO_MAC_METADATA ARCHIVE_EXTRACT_MAC_METADATA
#define TODO_HFS_COMPRESSION ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED
struct archive_write_disk {
struct archive archive;
mode_t user_umask;
struct fixup_entry *fixup_list;
struct fixup_entry *current_fixup;
int64_t user_uid;
int skip_file_set;
int64_t skip_file_dev;
int64_t skip_file_ino;
time_t start_time;
int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid);
void (*cleanup_gid)(void *private);
void *lookup_gid_data;
int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid);
void (*cleanup_uid)(void *private);
void *lookup_uid_data;
/*
* Full path of last file to satisfy symlink checks.
*/
struct archive_string path_safe;
/*
* Cached stat data from disk for the current entry.
* If this is valid, pst points to st. Otherwise,
* pst is null.
*/
struct stat st;
struct stat *pst;
/* Information about the object being restored right now. */
struct archive_entry *entry; /* Entry being extracted. */
char *name; /* Name of entry, possibly edited. */
struct archive_string _name_data; /* backing store for 'name' */
char *tmpname; /* Temporary name * */
struct archive_string _tmpname_data; /* backing store for 'tmpname' */
/* Tasks remaining for this object. */
int todo;
/* Tasks deferred until end-of-archive. */
int deferred;
/* Options requested by the client. */
int flags;
/* Handle for the file we're restoring. */
int fd;
/* Current offset for writing data to the file. */
int64_t offset;
/* Last offset actually written to disk. */
int64_t fd_offset;
/* Total bytes actually written to files. */
int64_t total_bytes_written;
/* Maximum size of file, -1 if unknown. */
int64_t filesize;
/* Dir we were in before this restore; only for deep paths. */
int restore_pwd;
/* Mode we should use for this entry; affected by _PERM and umask. */
mode_t mode;
/* UID/GID to use in restoring this entry. */
int64_t uid;
int64_t gid;
/*
* HFS+ Compression.
*/
/* Xattr "com.apple.decmpfs". */
uint32_t decmpfs_attr_size;
unsigned char *decmpfs_header_p;
/* ResourceFork set options used for fsetxattr. */
int rsrc_xattr_options;
/* Xattr "com.apple.ResourceFork". */
unsigned char *resource_fork;
size_t resource_fork_allocated_size;
unsigned int decmpfs_block_count;
uint32_t *decmpfs_block_info;
/* Buffer for compressed data. */
unsigned char *compressed_buffer;
size_t compressed_buffer_size;
size_t compressed_buffer_remaining;
/* The offset of the ResourceFork where compressed data will
* be placed. */
uint32_t compressed_rsrc_position;
uint32_t compressed_rsrc_position_v;
/* Buffer for uncompressed data. */
char *uncompressed_buffer;
size_t block_remaining_bytes;
size_t file_remaining_bytes;
#ifdef HAVE_ZLIB_H
z_stream stream;
int stream_valid;
int decmpfs_compression_level;
#endif
};
/*
* Default mode for dirs created automatically (will be modified by umask).
* Note that POSIX specifies 0777 for implicitly-created dirs, "modified
* by the process' file creation mask."
*/
#define DEFAULT_DIR_MODE 0777
/*
* Dir modes are restored in two steps: During the extraction, the permissions
* in the archive are modified to match the following limits. During
* the post-extract fixup pass, the permissions from the archive are
* applied.
*/
#define MINIMUM_DIR_MODE 0700
#define MAXIMUM_DIR_MODE 0775
/*
* Maximum uncompressed size of a decmpfs block.
*/
#define MAX_DECMPFS_BLOCK_SIZE (64 * 1024)
/*
* HFS+ compression type.
*/
#define CMP_XATTR 3/* Compressed data in xattr. */
#define CMP_RESOURCE_FORK 4/* Compressed data in resource fork. */
/*
* HFS+ compression resource fork.
*/
#define RSRC_H_SIZE 260 /* Base size of Resource fork header. */
#define RSRC_F_SIZE 50 /* Size of Resource fork footer. */
/* Size to write compressed data to resource fork. */
#define COMPRESSED_W_SIZE (64 * 1024)
/* decmpfs definitions. */
#define MAX_DECMPFS_XATTR_SIZE 3802
#ifndef DECMPFS_XATTR_NAME
#define DECMPFS_XATTR_NAME "com.apple.decmpfs"
#endif
#define DECMPFS_MAGIC 0x636d7066
#define DECMPFS_COMPRESSION_MAGIC 0
#define DECMPFS_COMPRESSION_TYPE 4
#define DECMPFS_UNCOMPRESSED_SIZE 8
#define DECMPFS_HEADER_SIZE 16
#define HFS_BLOCKS(s) ((s) >> 12)
static int la_opendirat(int, const char *);
static int la_mktemp(struct archive_write_disk *);
static int la_verify_filetype(mode_t, __LA_MODE_T);
static void fsobj_error(int *, struct archive_string *, int, const char *,
const char *);
static int check_symlinks_fsobj(char *, int *, struct archive_string *,
int, int);
static int check_symlinks(struct archive_write_disk *);
static int create_filesystem_object(struct archive_write_disk *);
static struct fixup_entry *current_fixup(struct archive_write_disk *,
const char *pathname);
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
static void edit_deep_directories(struct archive_write_disk *ad);
#endif
static int cleanup_pathname_fsobj(char *, int *, struct archive_string *,
int);
static int cleanup_pathname(struct archive_write_disk *);
static int create_dir(struct archive_write_disk *, char *);
static int create_parent_dir(struct archive_write_disk *, char *);
static ssize_t hfs_write_data_block(struct archive_write_disk *,
const char *, size_t);
static int fixup_appledouble(struct archive_write_disk *, const char *);
static int older(struct stat *, struct archive_entry *);
static int restore_entry(struct archive_write_disk *);
static int set_mac_metadata(struct archive_write_disk *, const char *,
const void *, size_t);
static int set_xattrs(struct archive_write_disk *);
static int clear_nochange_fflags(struct archive_write_disk *);
static int set_fflags(struct archive_write_disk *);
static int set_fflags_platform(struct archive_write_disk *, int fd,
const char *name, mode_t mode,
unsigned long fflags_set, unsigned long fflags_clear);
static int set_ownership(struct archive_write_disk *);
static int set_mode(struct archive_write_disk *, int mode);
static int set_time(int, int, const char *, time_t, long, time_t, long);
static int set_times(struct archive_write_disk *, int, int, const char *,
time_t, long, time_t, long, time_t, long, time_t, long);
static int set_times_from_entry(struct archive_write_disk *);
static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
static ssize_t write_data_block(struct archive_write_disk *,
const char *, size_t);
static void close_file_descriptor(struct archive_write_disk *);
static int _archive_write_disk_close(struct archive *);
static int _archive_write_disk_free(struct archive *);
static int _archive_write_disk_header(struct archive *,
struct archive_entry *);
static int64_t _archive_write_disk_filter_bytes(struct archive *, int);
static int _archive_write_disk_finish_entry(struct archive *);
static ssize_t _archive_write_disk_data(struct archive *, const void *,
size_t);
static ssize_t _archive_write_disk_data_block(struct archive *, const void *,
size_t, int64_t);
static int
la_mktemp(struct archive_write_disk *a)
{
int oerrno, fd;
mode_t mode;
archive_string_empty(&a->_tmpname_data);
archive_string_sprintf(&a->_tmpname_data, "%s.XXXXXX", a->name);
a->tmpname = a->_tmpname_data.s;
fd = __archive_mkstemp(a->tmpname);
if (fd == -1)
return -1;
mode = a->mode & 0777 & ~a->user_umask;
if (fchmod(fd, mode) == -1) {
oerrno = errno;
close(fd);
errno = oerrno;
return -1;
}
return fd;
}
static int
la_opendirat(int fd, const char *path) {
const int flags = O_CLOEXEC
#if defined(O_BINARY)
| O_BINARY
#endif
#if defined(O_DIRECTORY)
| O_DIRECTORY
#endif
#if defined(O_PATH)
| O_PATH
#elif defined(O_SEARCH)
| O_SEARCH
#elif defined(__FreeBSD__) && defined(O_EXEC)
| O_EXEC
#else
| O_RDONLY
#endif
;
#if !defined(HAVE_OPENAT)
if (fd != AT_FDCWD) {
errno = ENOTSUP;
return (-1);
} else
return (open(path, flags));
#else
return (openat(fd, path, flags));
#endif
}
static int
la_verify_filetype(mode_t mode, __LA_MODE_T filetype) {
int ret = 0;
switch (filetype) {
case AE_IFREG:
ret = (S_ISREG(mode));
break;
case AE_IFDIR:
ret = (S_ISDIR(mode));
break;
case AE_IFLNK:
ret = (S_ISLNK(mode));
break;
case AE_IFSOCK:
ret = (S_ISSOCK(mode));
break;
case AE_IFCHR:
ret = (S_ISCHR(mode));
break;
case AE_IFBLK:
ret = (S_ISBLK(mode));
break;
case AE_IFIFO:
ret = (S_ISFIFO(mode));
break;
default:
break;
}
return (ret);
}
static int
lazy_stat(struct archive_write_disk *a)
{
if (a->pst != NULL) {
/* Already have stat() data available. */
return (ARCHIVE_OK);
}
#ifdef HAVE_FSTAT
if (a->fd >= 0 && fstat(a->fd, &a->st) == 0) {
a->pst = &a->st;
return (ARCHIVE_OK);
}
#endif
/*
* XXX At this point, symlinks should not be hit, otherwise
* XXX a race occurred. Do we want to check explicitly for that?
*/
#ifdef HAVE_LSTAT
if (lstat(a->name, &a->st) == 0)
#else
if (la_stat(a->name, &a->st) == 0)
#endif
{
a->pst = &a->st;
return (ARCHIVE_OK);
}
archive_set_error(&a->archive, errno, "Couldn't stat file");
return (ARCHIVE_WARN);
}
static const struct archive_vtable
archive_write_disk_vtable = {
.archive_close = _archive_write_disk_close,
.archive_filter_bytes = _archive_write_disk_filter_bytes,
.archive_free = _archive_write_disk_free,
.archive_write_header = _archive_write_disk_header,
.archive_write_finish_entry = _archive_write_disk_finish_entry,
.archive_write_data = _archive_write_disk_data,
.archive_write_data_block = _archive_write_disk_data_block,
};
static int64_t
_archive_write_disk_filter_bytes(struct archive *_a, int n)
{
struct archive_write_disk *a = (struct archive_write_disk *)_a;
(void)n; /* UNUSED */
if (n == -1 || n == 0)
return (a->total_bytes_written);
return (-1);
}
int
archive_write_disk_set_options(struct archive *_a, int flags)
{
struct archive_write_disk *a = (struct archive_write_disk *)_a;
a->flags = flags;
return (ARCHIVE_OK);
}
/*
* Extract this entry to disk.
*
* TODO: Validate hardlinks. According to the standards, we're
* supposed to check each extracted hardlink and squawk if it refers
* to a file that we didn't restore. I'm not entirely convinced this
* is a good idea, but more importantly: Is there any way to validate
* hardlinks without keeping a complete list of filenames from the
* entire archive?? Ugh.
*
*/
static int
_archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
{
struct archive_write_disk *a = (struct archive_write_disk *)_a;
struct fixup_entry *fe;
const char *linkname;
int ret, r;
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
"archive_write_disk_header");
archive_clear_error(&a->archive);
if (a->archive.state & ARCHIVE_STATE_DATA) {
r = _archive_write_disk_finish_entry(&a->archive);
if (r == ARCHIVE_FATAL)
return (r);
}
/* Set up for this particular entry. */
a->pst = NULL;
a->current_fixup = NULL;
a->deferred = 0;
if (a->entry) {
archive_entry_free(a->entry);
a->entry = NULL;
}
a->entry = archive_entry_clone(entry);
a->fd = -1;
a->fd_offset = 0;
a->offset = 0;
a->restore_pwd = -1;
a->uid = a->user_uid;
a->mode = archive_entry_mode(a->entry);
if (archive_entry_size_is_set(a->entry))
a->filesize = archive_entry_size(a->entry);
else
a->filesize = -1;
archive_strcpy(&(a->_name_data), archive_entry_pathname(a->entry));
a->name = a->_name_data.s;
archive_clear_error(&a->archive);
/*
* Clean up the requested path. This is necessary for correct
* dir restores; the dir restore logic otherwise gets messed
* up by nonsense like "dir/.".
*/
ret = cleanup_pathname(a);
if (ret != ARCHIVE_OK)
return (ret);
/*
* Check if we have a hardlink that points to itself.
*/
linkname = archive_entry_hardlink(a->entry);
if (linkname != NULL && strcmp(a->name, linkname) == 0) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Skipping hardlink pointing to itself: %s",
a->name);
return (ARCHIVE_WARN);
}
/*
* Query the umask so we get predictable mode settings.
* This gets done on every call to _write_header in case the
* user edits their umask during the extraction for some
* reason.
*/
umask(a->user_umask = umask(0));
/* Figure out what we need to do for this entry. */
a->todo = TODO_MODE_BASE;
if (a->flags & ARCHIVE_EXTRACT_PERM) {
a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
/*
* SGID requires an extra "check" step because we
* cannot easily predict the GID that the system will
* assign. (Different systems assign GIDs to files
* based on a variety of criteria, including process
* credentials and the gid of the enclosing
* directory.) We can only restore the SGID bit if
* the file has the right GID, and we only know the
* GID if we either set it (see set_ownership) or if
* we've actually called stat() on the file after it
* was restored. Since there are several places at
* which we might verify the GID, we need a TODO bit
* to keep track.
*/
if (a->mode & S_ISGID)
a->todo |= TODO_SGID | TODO_SGID_CHECK;
/*
* Verifying the SUID is simpler, but can still be
* done in multiple ways, hence the separate "check" bit.
*/
if (a->mode & S_ISUID)
a->todo |= TODO_SUID | TODO_SUID_CHECK;
} else {
/*
* User didn't request full permissions, so don't
* restore SUID, SGID bits and obey umask.
*/
a->mode &= ~S_ISUID;
a->mode &= ~S_ISGID;
a->mode &= ~S_ISVTX;
a->mode &= ~a->user_umask;
}
if (a->flags & ARCHIVE_EXTRACT_OWNER)
a->todo |= TODO_OWNER;
if (a->flags & ARCHIVE_EXTRACT_TIME)
a->todo |= TODO_TIMES;
if (a->flags & ARCHIVE_EXTRACT_ACL) {
#if ARCHIVE_ACL_DARWIN
/*
* On MacOS, platform ACLs get stored in mac_metadata, too.
* If we intend to extract mac_metadata and it is present
* we skip extracting libarchive NFSv4 ACLs.
*/
size_t metadata_size;
if ((a->flags & ARCHIVE_EXTRACT_MAC_METADATA) == 0 ||
archive_entry_mac_metadata(a->entry,
&metadata_size) == NULL || metadata_size == 0)
#endif
#if ARCHIVE_ACL_LIBRICHACL
/*
* RichACLs are stored in an extended attribute.
* If we intend to extract extended attributes and have this
* attribute we skip extracting libarchive NFSv4 ACLs.
*/
short extract_acls = 1;
if (a->flags & ARCHIVE_EXTRACT_XATTR && (
archive_entry_acl_types(a->entry) &
ARCHIVE_ENTRY_ACL_TYPE_NFS4)) {
const char *attr_name;
const void *attr_value;
size_t attr_size;
int i = archive_entry_xattr_reset(a->entry);
while (i--) {
archive_entry_xattr_next(a->entry, &attr_name,
&attr_value, &attr_size);
if (attr_name != NULL && attr_value != NULL &&
attr_size > 0 && strcmp(attr_name,
"trusted.richacl") == 0) {
extract_acls = 0;
break;
}
}
}
if (extract_acls)
#endif
#if ARCHIVE_ACL_DARWIN || ARCHIVE_ACL_LIBRICHACL
{
#endif
if (archive_entry_filetype(a->entry) == AE_IFDIR)
a->deferred |= TODO_ACLS;
else
a->todo |= TODO_ACLS;
#if ARCHIVE_ACL_DARWIN || ARCHIVE_ACL_LIBRICHACL
}
#endif
}
if (a->flags & ARCHIVE_EXTRACT_MAC_METADATA) {
if (archive_entry_filetype(a->entry) == AE_IFDIR)
a->deferred |= TODO_MAC_METADATA;
else
a->todo |= TODO_MAC_METADATA;
}
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
if ((a->flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) == 0) {
unsigned long set, clear;
archive_entry_fflags(a->entry, &set, &clear);
if ((set & ~clear) & UF_COMPRESSED) {
a->todo |= TODO_HFS_COMPRESSION;
a->decmpfs_block_count = (unsigned)-1;
}
}
if ((a->flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) != 0 &&
(a->mode & AE_IFMT) == AE_IFREG && a->filesize > 0) {
a->todo |= TODO_HFS_COMPRESSION;
a->decmpfs_block_count = (unsigned)-1;
}
{
const char *p;
/* Check if the current file name is a type of the
* resource fork file. */
p = strrchr(a->name, '/');
if (p == NULL)
p = a->name;
else
p++;
if (p[0] == '.' && p[1] == '_') {
/* Do not compress "._XXX" files. */
a->todo &= ~TODO_HFS_COMPRESSION;
if (a->filesize > 0)
a->todo |= TODO_APPLEDOUBLE;
}
}
#endif
if (a->flags & ARCHIVE_EXTRACT_XATTR) {
#if ARCHIVE_XATTR_DARWIN
/*
* On MacOS, extended attributes get stored in mac_metadata,
* too. If we intend to extract mac_metadata and it is present
* we skip extracting extended attributes.
*/
size_t metadata_size;
if ((a->flags & ARCHIVE_EXTRACT_MAC_METADATA) == 0 ||
archive_entry_mac_metadata(a->entry,
&metadata_size) == NULL || metadata_size == 0)
#endif
a->todo |= TODO_XATTR;
}
if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
a->todo |= TODO_FFLAGS;
if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
ret = check_symlinks(a);
if (ret != ARCHIVE_OK)
return (ret);
}
#if defined(HAVE_FCHDIR) && defined(PATH_MAX)
/* If path exceeds PATH_MAX, shorten the path. */
edit_deep_directories(a);
#endif
ret = restore_entry(a);
#if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
/*
* Check if the filesystem the file is restoring on supports
* HFS+ Compression. If not, cancel HFS+ Compression.
*/
if (a->todo | TODO_HFS_COMPRESSION) {
/*
* NOTE: UF_COMPRESSED is ignored even if the filesystem
* supports HFS+ Compression because the file should
* have at least an extended attribute "com.apple.decmpfs"
* before the flag is set to indicate that the file have
* been compressed. If the filesystem does not support
* HFS+ Compression the system call will fail.
*/
if (a->fd < 0 || fchflags(a->fd, UF_COMPRESSED) != 0)
a->todo &= ~TODO_HFS_COMPRESSION;
}
#endif
/*
* TODO: There are rumours that some extended attributes must
* be restored before file data is written. If this is true,
* then we either need to write all extended attributes both
* before and after restoring the data, or find some rule for
* determining which must go first and which last. Due to the
* many ways people are using xattrs, this may prove to be an
* intractable problem.
*/
#ifdef HAVE_FCHDIR
/* If we changed directory above, restore it here. */
if (a->restore_pwd >= 0) {
r = fchdir(a->restore_pwd);
if (r != 0) {
archive_set_error(&a->archive, errno,
"chdir() failure");
ret = ARCHIVE_FATAL;
}
close(a->restore_pwd);
a->restore_pwd = -1;
}
#endif
/*
* Fixup uses the unedited pathname from archive_entry_pathname(),
* because it is relative to the base dir and the edited path
* might be relative to some intermediate dir as a result of the
* deep restore logic.
*/
if (a->deferred & TODO_MODE) {
fe = current_fixup(a, archive_entry_pathname(entry));
if (fe == NULL)
return (ARCHIVE_FATAL);
fe->filetype = archive_entry_filetype(entry);
fe->fixup |= TODO_MODE_BASE;
fe->mode = a->mode;
}
if ((a->deferred & TODO_TIMES)
&& (archive_entry_mtime_is_set(entry)
|| archive_entry_atime_is_set(entry))) {
fe = current_fixup(a, archive_entry_pathname(entry));
if (fe == NULL)
return (ARCHIVE_FATAL);
fe->filetype = archive_entry_filetype(entry);
fe->mode = a->mode;
fe->fixup |= TODO_TIMES;
if (archive_entry_atime_is_set(entry)) {
fe->atime = archive_entry_atime(entry);
fe->atime_nanos = archive_entry_atime_nsec(entry);
} else {
/* If atime is unset, use start time. */
fe->atime = a->start_time;
fe->atime_nanos = 0;
}
if (archive_entry_mtime_is_set(entry)) {
fe->mtime = archive_entry_mtime(entry);
fe->mtime_nanos = archive_entry_mtime_nsec(entry);
} else {
/* If mtime is unset, use start time. */
fe->mtime = a->start_time;
fe->mtime_nanos = 0;
}
if (archive_entry_birthtime_is_set(entry)) {
fe->birthtime = archive_entry_birthtime(entry);
fe->birthtime_nanos = archive_entry_birthtime_nsec(
entry);
} else {
/* If birthtime is unset, use mtime. */
fe->birthtime = fe->mtime;
fe->birthtime_nanos = fe->mtime_nanos;
}
}
if (a->deferred & TODO_ACLS) {
fe = current_fixup(a, archive_entry_pathname(entry));
if (fe == NULL)
return (ARCHIVE_FATAL);
fe->filetype = archive_entry_filetype(entry);
fe->fixup |= TODO_ACLS;
archive_acl_copy(&fe->acl, archive_entry_acl(entry));
}
if (a->deferred & TODO_MAC_METADATA) {
const void *metadata;
size_t metadata_size;
metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
if (metadata != NULL && metadata_size > 0) {
fe = current_fixup(a, archive_entry_pathname(entry));
if (fe == NULL)
return (ARCHIVE_FATAL);
fe->filetype = archive_entry_filetype(entry);
fe->mac_metadata = malloc(metadata_size);
if (fe->mac_metadata != NULL) {
memcpy(fe->mac_metadata, metadata,
metadata_size);
fe->mac_metadata_size = metadata_size;
fe->fixup |= TODO_MAC_METADATA;
}
}
}
if (a->deferred & TODO_FFLAGS) {
fe = current_fixup(a, archive_entry_pathname(entry));
if (fe == NULL)
return (ARCHIVE_FATAL);
fe->filetype = archive_entry_filetype(entry);
fe->fixup |= TODO_FFLAGS;
/* TODO: Complete this.. defer fflags from below. */
}
/* We've created the object and are ready to pour data into it. */
if (ret >= ARCHIVE_WARN)
a->archive.state = ARCHIVE_STATE_DATA;
/*
* If it's not open, tell our client not to try writing.
* In particular, dirs, links, etc, don't get written to.
*/
if (a->fd < 0) {
archive_entry_set_size(entry, 0);
a->filesize = 0;
}
return (ret);
}
int
archive_write_disk_set_skip_file(struct archive *_a, la_int64_t d, la_int64_t i)
{
struct archive_write_disk *a = (struct archive_write_disk *)_a;
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
a->skip_file_set = 1;
a->skip_file_dev = d;
a->skip_file_ino = i;
return (ARCHIVE_OK);
}
static ssize_t
write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
{
uint64_t start_size = size;
ssize_t bytes_written = 0;
ssize_t block_size = 0, bytes_to_write;
if (size == 0)
return (ARCHIVE_OK);
if (a->filesize == 0 || a->fd < 0) {
archive_set_error(&a->archive, 0,
"Attempt to write to an empty file");
return (ARCHIVE_WARN);
}
if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
#if HAVE_STRUCT_STAT_ST_BLKSIZE
int r;
if ((r = lazy_stat(a)) != ARCHIVE_OK)
return (r);
block_size = a->pst->st_blksize;
#else
/* XXX TODO XXX Is there a more appropriate choice here ? */
/* This needn't match the filesystem allocation size. */
block_size = 16*1024;
#endif
}
/* If this write would run beyond the file size, truncate it. */
if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
start_size = size = (size_t)(a->filesize - a->offset);
/* Write the data. */
while (size > 0) {
if (block_size == 0) {
bytes_to_write = size;
} else {
/* We're sparsifying the file. */
const char *p, *end;
int64_t block_end;