* extract_image.c
*
* Support for extracting WIM files.
- *
- * This code does NOT contain any filesystem-specific features. In particular,
- * security information (i.e. file permissions) and alternate data streams are
- * ignored, except possibly to read an alternate data stream that contains
- * symbolic link data.
*/
/*
- * Copyright (C) 2012 Eric Biggers
+ * Copyright (C) 2012, 2013 Eric Biggers
*
* This file is part of wimlib, a library for working with WIM files.
*
#include "config.h"
#include <dirent.h>
+
+#ifdef __WIN32__
+# include "win32.h"
+#else
+# ifdef HAVE_UTIME_H
+# include <utime.h>
+# endif
+# include "timestamp.h"
+# include <sys/time.h>
+#endif
+
#include <errno.h>
#include <fcntl.h>
+#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
-#include <stdlib.h>
-#include <sys/time.h>
-
-#ifdef HAVE_UTIME_H
-#include <utime.h>
-#endif
-
#include <unistd.h>
#include "dentry.h"
#include "lookup_table.h"
-#include "timestamp.h"
#include "wimlib_internal.h"
#include "xml.h"
#ifdef WITH_NTFS_3G
-#include <ntfs-3g/volume.h>
+# include <ntfs-3g/volume.h>
+#endif
+
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
#endif
+#ifndef __WIN32__
static int extract_regular_file_linked(struct wim_dentry *dentry,
const char *output_path,
struct apply_args *args,
return 0;
}
+static int symlink_apply_unix_data(const char *link,
+ const struct wimlib_unix_data *unix_data)
+{
+ if (lchown(link, unix_data->uid, unix_data->gid)) {
+ if (errno == EPERM) {
+ /* Ignore */
+ WARNING_WITH_ERRNO("failed to set symlink UNIX owner/group");
+ } else {
+ ERROR_WITH_ERRNO("failed to set symlink UNIX owner/group");
+ return WIMLIB_ERR_INVALID_DENTRY;
+ }
+ }
+ return 0;
+}
+
+static int fd_apply_unix_data(int fd, const struct wimlib_unix_data *unix_data)
+{
+ if (fchown(fd, unix_data->uid, unix_data->gid)) {
+ if (errno == EPERM) {
+ WARNING_WITH_ERRNO("failed to set file UNIX owner/group");
+ /* Ignore? */
+ } else {
+ ERROR_WITH_ERRNO("failed to set file UNIX owner/group");
+ return WIMLIB_ERR_INVALID_DENTRY;
+ }
+ }
+
+ if (fchmod(fd, unix_data->mode)) {
+ if (errno == EPERM) {
+ WARNING_WITH_ERRNO("failed to set UNIX file mode");
+ /* Ignore? */
+ } else {
+ ERROR_WITH_ERRNO("failed to set UNIX file mode");
+ return WIMLIB_ERR_INVALID_DENTRY;
+ }
+ }
+ return 0;
+}
+
+static int dir_apply_unix_data(const char *dir,
+ const struct wimlib_unix_data *unix_data)
+{
+ int dfd = open(dir, O_RDONLY);
+ int ret;
+ if (dfd >= 0) {
+ ret = fd_apply_unix_data(dfd, unix_data);
+ if (close(dfd)) {
+ ERROR_WITH_ERRNO("can't close directory `%s'", dir);
+ ret = WIMLIB_ERR_MKDIR;
+ }
+ } else {
+ ERROR_WITH_ERRNO("can't open directory `%s'", dir);
+ ret = WIMLIB_ERR_MKDIR;
+ }
+ return ret;
+}
+
static int extract_regular_file_unlinked(struct wim_dentry *dentry,
struct apply_args *args,
const char *output_path,
/* Empty file with no lookup table entry */
DEBUG("Empty file `%s'.", output_path);
ret = 0;
- goto out;
+ goto out_extract_unix_data;
}
ret = extract_wim_resource_to_fd(lte, out_fd, wim_resource_size(lte));
ERROR("Failed to extract resource to `%s'", output_path);
goto out;
}
- args->progress.extract.completed_bytes += wim_resource_size(lte);
+
+out_extract_unix_data:
+ if (args->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
+ struct wimlib_unix_data unix_data;
+ ret = inode_get_unix_data(inode, &unix_data, NULL);
+ if (ret > 0)
+ ;
+ else if (ret < 0)
+ ret = 0;
+ else
+ ret = fd_apply_unix_data(out_fd, &unix_data);
+ if (ret != 0)
+ goto out;
+ }
+ if (lte)
+ args->progress.extract.completed_bytes += wim_resource_size(lte);
out:
if (close(out_fd) != 0) {
ERROR_WITH_ERRNO("Failed to close file `%s'", output_path);
- ret = WIMLIB_ERR_WRITE;
+ if (ret == 0)
+ ret = WIMLIB_ERR_WRITE;
}
return ret;
}
return WIMLIB_ERR_LINK;
}
lte = inode_unnamed_lte_resolved(dentry->d_inode);
+ wimlib_assert(lte != NULL);
+ if (args->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
+ struct wimlib_unix_data unix_data;
+ ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
+ if (ret > 0)
+ ;
+ else if (ret < 0)
+ ret = 0;
+ else
+ ret = symlink_apply_unix_data(output_path, &unix_data);
+ if (ret != 0)
+ return ret;
+ }
args->progress.extract.completed_bytes += wim_resource_size(lte);
return 0;
}
-static int extract_directory(const char *output_path, bool is_root)
+#endif /* !__WIN32__ */
+
+static int extract_directory(struct wim_dentry *dentry,
+ const char *output_path, bool is_root)
{
int ret;
struct stat stbuf;
+
ret = stat(output_path, &stbuf);
if (ret == 0) {
if (S_ISDIR(stbuf.st_mode)) {
/*if (!is_root)*/
/*WARNING("`%s' already exists", output_path);*/
- return 0;
+ goto dir_exists;
} else {
ERROR("`%s' is not a directory", output_path);
return WIMLIB_ERR_MKDIR;
output_path);
return WIMLIB_ERR_MKDIR;
}
- return 0;
+dir_exists:
+ ret = 0;
+#ifndef __WIN32__
+ if (dentry) {
+ struct wimlib_unix_data unix_data;
+ ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
+ if (ret > 0)
+ ;
+ else if (ret < 0)
+ ret = 0;
+ else
+ ret = dir_apply_unix_data(output_path, &unix_data);
+ }
+#endif
+ return ret;
}
-/* Extracts a file, directory, or symbolic link from the WIM archive. */
-static int apply_dentry_normal(struct wim_dentry *dentry, void *arg)
+#ifndef __WIN32__
+static int unix_do_apply_dentry(const char *output_path,
+ size_t output_path_len,
+ struct wim_dentry *dentry,
+ struct apply_args *args)
{
- struct apply_args *args = arg;
- struct wim_inode *inode = dentry->d_inode;
- size_t len;
-
- len = strlen(args->target);
- char output_path[len + dentry->full_path_utf8_len + 1];
- memcpy(output_path, args->target, len);
- memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
- output_path[len + dentry->full_path_utf8_len] = '\0';
+ const struct wim_inode *inode = dentry->d_inode;
if (inode_is_symlink(inode))
return extract_symlink(dentry, args, output_path);
else if (inode_is_directory(inode))
- return extract_directory(output_path, false);
+ return extract_directory((args->extract_flags &
+ WIMLIB_EXTRACT_FLAG_UNIX_DATA) ? dentry : NULL,
+ output_path, false);
else
return extract_regular_file(dentry, args, output_path);
}
-/* Apply timestamps to an extracted file or directory */
-static int apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
+static int unix_do_apply_dentry_timestamps(const char *output_path,
+ size_t output_path_len,
+ const struct wim_dentry *dentry,
+ struct apply_args *args)
{
- struct apply_args *args = arg;
- size_t len = strlen(args->target);
- char output_path[len + dentry->full_path_utf8_len + 1];
- const struct wim_inode *inode = dentry->d_inode;
int ret;
+ const struct wim_inode *inode = dentry->d_inode;
- memcpy(output_path, args->target, len);
- memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
- output_path[len + dentry->full_path_utf8_len] = '\0';
-
+#ifdef HAVE_UTIMENSAT
/* Convert the WIM timestamps, which are accurate to 100 nanoseconds,
- * into struct timeval's. */
- struct timeval tv[2];
- wim_timestamp_to_timeval(inode->i_last_access_time, &tv[0]);
- wim_timestamp_to_timeval(inode->i_last_write_time, &tv[1]);
+ * into `struct timespec's for passing to utimensat(), which is accurate
+ * to 1 nanosecond. */
+
+ struct timespec ts[2];
+ ts[0] = wim_timestamp_to_timespec(inode->i_last_access_time);
+ ts[1] = wim_timestamp_to_timespec(inode->i_last_write_time);
+ ret = utimensat(AT_FDCWD, output_path, ts, AT_SYMLINK_NOFOLLOW);
+ if (ret)
+ ret = errno;
+#else
+ ret = ENOSYS;
+#endif
+
+ if (ret == ENOSYS) {
+ /* utimensat() not implemented or not available */
#ifdef HAVE_LUTIMES
- ret = lutimes(output_path, tv);
- #else
- ret = -1;
- errno = ENOSYS;
+ /* Convert the WIM timestamps, which are accurate to 100
+ * nanoseconds, into `struct timeval's for passing to lutimes(),
+ * which is accurate to 1 microsecond. */
+ struct timeval tv[2];
+ tv[0] = wim_timestamp_to_timeval(inode->i_last_access_time);
+ tv[1] = wim_timestamp_to_timeval(inode->i_last_write_time);
+ ret = lutimes(output_path, tv);
+ if (ret)
+ ret = errno;
#endif
- if (ret != 0) {
- #ifdef HAVE_UTIME
- if (errno == ENOSYS) {
- struct utimbuf buf;
- buf.actime = wim_timestamp_to_unix(inode->i_last_access_time);
- buf.modtime = wim_timestamp_to_unix(inode->i_last_write_time);
- if (utime(output_path, &buf) == 0)
- return 0;
- }
- #endif
- if (errno != ENOSYS || args->num_lutimes_warnings < 10) {
- /*WARNING_WITH_ERRNO("Failed to set timestamp on file `%s',*/
- /*output_path");*/
- args->num_lutimes_warnings++;
- }
+ }
+
+ if (ret == ENOSYS) {
+ /* utimensat() and lutimes() both not implemented or not
+ * available */
+ #ifdef HAVE_UTIME
+ /* Convert the WIM timestamps, which are accurate to 100
+ * nanoseconds, into a `struct utimbuf's for passing to
+ * utime(), which is accurate to 1 second. */
+ struct utimbuf buf;
+ buf.actime = wim_timestamp_to_unix(inode->i_last_access_time);
+ buf.modtime = wim_timestamp_to_unix(inode->i_last_write_time);
+ ret = utime(output_path, &buf);
+ #endif
+ }
+ if (ret && args->num_utime_warnings < 10) {
+ WARNING_WITH_ERRNO("Failed to set timestamp on file `%s'",
+ output_path);
+ args->num_utime_warnings++;
}
return 0;
}
+#endif /* !__WIN32__ */
+
+/* Extracts a file, directory, or symbolic link from the WIM archive. */
+static int apply_dentry_normal(struct wim_dentry *dentry, void *arg)
+{
+ struct apply_args *args = arg;
+ size_t len;
+ char *output_path;
+
+ len = strlen(args->target);
+ if (dentry_is_root(dentry)) {
+ output_path = (char*)args->target;
+ } else {
+ output_path = alloca(len + dentry->full_path_utf8_len + 1);
+ memcpy(output_path, args->target, len);
+ memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
+ output_path[len + dentry->full_path_utf8_len] = '\0';
+ len += dentry->full_path_utf8_len;
+ }
+#ifdef __WIN32__
+ return win32_do_apply_dentry(output_path, len, dentry, args);
+#else
+ return unix_do_apply_dentry(output_path, len, dentry, args);
+#endif
+}
+
+
+/* Apply timestamps to an extracted file or directory */
+static int apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
+{
+ struct apply_args *args = arg;
+ size_t len;
+ char *output_path;
+
+ len = strlen(args->target);
+ if (dentry_is_root(dentry)) {
+ output_path = (char*)args->target;
+ } else {
+ output_path = alloca(len + dentry->full_path_utf8_len + 1);
+ memcpy(output_path, args->target, len);
+ memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
+ output_path[len + dentry->full_path_utf8_len] = '\0';
+ len += dentry->full_path_utf8_len;
+ }
+#ifdef __WIN32__
+ return win32_do_apply_dentry_timestamps(output_path, len, dentry, args);
+#else
+ return unix_do_apply_dentry_timestamps(output_path, len, dentry, args);
+#endif
+}
/* Extract a dentry if it hasn't already been extracted, and either the dentry
* has no streams or WIMLIB_EXTRACT_FLAG_NO_STREAMS is not specified. */
struct apply_args args;
const struct apply_operations *ops;
- args.w = w;
- args.target = target;
- args.extract_flags = extract_flags;
- args.num_lutimes_warnings = 0;
- args.stream_list = &stream_list;
- args.progress_func = progress_func;
+ args.w = w;
+ args.target = target;
+ args.extract_flags = extract_flags;
+ args.num_utime_warnings = 0;
+ args.stream_list = &stream_list;
+ args.progress_func = progress_func;
if (progress_func) {
args.progress.extract.wimfile_name = w->filename;
int image;
const char *image_name;
- ret = extract_directory(target, true);
+ ret = extract_directory(NULL, target, true);
if (ret != 0)
return ret;
== (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
return WIMLIB_ERR_INVALID_PARAM;
+#ifdef __WIN32__
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
+ ERROR("Extracting UNIX data is not supported on Windows");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+ if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
+ ERROR("Linked extraction modes are not supported on Windows");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+#endif
+
if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
#ifdef WITH_NTFS_3G
if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))) {
"directly to a NTFS volume");
return WIMLIB_ERR_INVALID_PARAM;
}
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
+ ERROR("Cannot restore UNIX-specific data in the NTFS extraction mode");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
#else
ERROR("wimlib was compiled without support for NTFS-3g, so");
ERROR("we cannot apply a WIM image directly to a NTFS volume");
w->lookup_table = joined_tab;
}
+#ifdef __WIN32__
+ win32_acquire_restore_privileges();
+#endif
if (image == WIMLIB_ALL_IMAGES) {
extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
ret = extract_all_images(w, target, extract_flags,
ret = extract_single_image(w, image, target, extract_flags,
progress_func);
}
+#ifdef __WIN32__
+ win32_release_restore_privileges();
+#endif
if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK))
git://wimlib.net / wimlib / blobdiff