*/
/*
- * Copyright (C) 2012, 2013 Eric Biggers
+ * Copyright (C) 2012, 2013, 2014 Eric Biggers
*
* This file is part of wimlib, a library for working with WIM files.
*
* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
-#ifndef __WIN32__
-
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "wimlib/apply.h"
+#include "wimlib/dentry.h"
#include "wimlib/error.h"
-#include "wimlib/lookup_table.h"
-#include "wimlib/resource.h"
+#include "wimlib/file_io.h"
+#include "wimlib/reparse.h"
#include "wimlib/timestamp.h"
+#include "wimlib/unix_data.h"
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
+#include <stdlib.h>
#include <sys/stat.h>
+#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
-#ifdef HAVE_UTIME_H
-# include <utime.h>
+/* We don't require O_NOFOLLOW, but the advantage of having it is that if we
+ * need to extract a file to a location at which there exists a symbolic link,
+ * open(..., O_NOFOLLOW | ...) recognizes the symbolic link rather than
+ * following it and creating the file somewhere else. (Equivalent to
+ * FILE_OPEN_REPARSE_POINT on Windows.) */
+#ifndef O_NOFOLLOW
+# define O_NOFOLLOW 0
#endif
static int
-unix_start_extract(const char *target, struct apply_ctx *ctx)
+unix_get_supported_features(const char *target,
+ struct wim_features *supported_features)
{
- ctx->supported_features.hard_links = 1;
- ctx->supported_features.symlink_reparse_points = 1;
- ctx->supported_features.unix_data = 1;
+ supported_features->hard_links = 1;
+ supported_features->symlink_reparse_points = 1;
+ supported_features->unix_data = 1;
+ supported_features->timestamps = 1;
+ supported_features->case_sensitive_filenames = 1;
return 0;
}
+#define NUM_PATHBUFS 2 /* We need 2 when creating hard links */
+#define MAX_OPEN_FDS 1000 /* TODO: Add special case for when the number of
+ identical streams exceeds this number. */
+
+struct unix_apply_ctx {
+ /* Extract flags, the pointer to the WIMStruct, etc. */
+ struct apply_ctx common;
+
+ /* Buffers for building extraction paths (allocated). */
+ char *pathbufs[NUM_PATHBUFS];
+
+ /* Index of next pathbuf to use */
+ unsigned which_pathbuf;
+
+ /* Currently open file descriptors for extraction */
+ struct filedes open_fds[MAX_OPEN_FDS];
+
+ /* Number of currently open file descriptors in open_fds, starting from
+ * the beginning of the array. */
+ unsigned num_open_fds;
+
+ /* Buffer for reading reparse data streams into memory */
+ u8 reparse_data[REPARSE_DATA_MAX_SIZE];
+
+ /* Pointer to the next byte in @reparse_data to fill */
+ u8 *reparse_ptr;
+
+ /* Absolute path to the target directory (allocated buffer). Only set
+ * if needed for absolute symbolic link fixups. */
+ char *target_abspath;
+
+ /* Number of characters in target_abspath. */
+ size_t target_abspath_nchars;
+
+ /* Number of special files we couldn't create due to EPERM */
+ unsigned long num_special_files_ignored;
+};
+
+/* Returns the number of characters needed to represent the path to the
+ * specified @dentry when extracted, not including the null terminator or the
+ * path to the target directory itself. */
+static size_t
+unix_dentry_path_length(const struct wim_dentry *dentry)
+{
+ size_t len = 0;
+ const struct wim_dentry *d;
+
+ d = dentry;
+ do {
+ len += d->d_extraction_name_nchars + 1;
+ d = d->d_parent;
+ } while (!dentry_is_root(d) && will_extract_dentry(d));
+
+ return len;
+}
+
+/* Returns the maximum number of characters needed to represent the path to any
+ * dentry in @dentry_list when extracted, including the null terminator and the
+ * path to the target directory itself. */
+static size_t
+unix_compute_path_max(const struct list_head *dentry_list,
+ const struct unix_apply_ctx *ctx)
+{
+ size_t max = 0;
+ size_t len;
+ const struct wim_dentry *dentry;
+
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+ len = unix_dentry_path_length(dentry);
+ if (len > max)
+ max = len;
+ }
+
+ /* Account for target and null terminator. */
+ return ctx->common.target_nchars + max + 1;
+}
+
+/* Builds and returns the filesystem path to which to extract @dentry.
+ * This cycles through NUM_PATHBUFS different buffers. */
+static const char *
+unix_build_extraction_path(const struct wim_dentry *dentry,
+ struct unix_apply_ctx *ctx)
+{
+ char *pathbuf;
+ char *p;
+ const struct wim_dentry *d;
+
+ pathbuf = ctx->pathbufs[ctx->which_pathbuf];
+ ctx->which_pathbuf = (ctx->which_pathbuf + 1) % NUM_PATHBUFS;
+
+ p = &pathbuf[ctx->common.target_nchars +
+ unix_dentry_path_length(dentry)];
+ *p = '\0';
+ d = dentry;
+ do {
+ p -= d->d_extraction_name_nchars;
+ memcpy(p, d->d_extraction_name, d->d_extraction_name_nchars);
+ *--p = '/';
+ d = d->d_parent;
+ } while (!dentry_is_root(d) && will_extract_dentry(d));
+
+ return pathbuf;
+}
+
+/* This causes the next call to unix_build_extraction_path() to use the same
+ * path buffer as the previous call. */
+static void
+unix_reuse_pathbuf(struct unix_apply_ctx *ctx)
+{
+ ctx->which_pathbuf = (ctx->which_pathbuf - 1) % NUM_PATHBUFS;
+}
+
+/* Builds and returns the filesystem path to which to extract an unspecified
+ * alias of the @inode. This cycles through NUM_PATHBUFS different buffers. */
+static const char *
+unix_build_inode_extraction_path(const struct wim_inode *inode,
+ struct unix_apply_ctx *ctx)
+{
+ return unix_build_extraction_path(inode_first_extraction_dentry(inode), ctx);
+}
+
+/* Sets the timestamps on a file being extracted.
+ *
+ * Either @fd or @path must be specified (not -1 and not NULL, respectively).
+ */
static int
-unix_create_file(const char *path, struct apply_ctx *ctx)
+unix_set_timestamps(int fd, const char *path, u64 atime, u64 mtime)
{
- int fd = open(path, O_TRUNC | O_CREAT | O_WRONLY, 0644);
- if (fd < 0)
- return WIMLIB_ERR_OPEN;
- close(fd);
+ {
+ struct timespec times[2];
+
+ times[0] = wim_timestamp_to_timespec(atime);
+ times[1] = wim_timestamp_to_timespec(mtime);
+
+ errno = ENOSYS;
+#ifdef HAVE_FUTIMENS
+ if (fd >= 0 && !futimens(fd, times))
+ return 0;
+#endif
+#ifdef HAVE_UTIMENSAT
+ if (fd < 0 && !utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW))
+ return 0;
+#endif
+ if (errno != ENOSYS)
+ return WIMLIB_ERR_SET_TIMESTAMPS;
+ }
+ {
+ struct timeval times[2];
+
+ times[0] = wim_timestamp_to_timeval(atime);
+ times[1] = wim_timestamp_to_timeval(mtime);
+
+ if (fd >= 0 && !futimes(fd, times))
+ return 0;
+ if (fd < 0 && !lutimes(path, times))
+ return 0;
+ return WIMLIB_ERR_SET_TIMESTAMPS;
+ }
+}
+
+static int
+unix_set_owner_and_group(int fd, const char *path, uid_t uid, gid_t gid)
+{
+ if (fd >= 0 && !fchown(fd, uid, gid))
+ return 0;
+ if (fd < 0 && !lchown(path, uid, gid))
+ return 0;
+ return WIMLIB_ERR_SET_SECURITY;
+}
+
+static int
+unix_set_mode(int fd, const char *path, mode_t mode)
+{
+ if (fd >= 0 && !fchmod(fd, mode))
+ return 0;
+ if (fd < 0 && !chmod(path, mode))
+ return 0;
+ return WIMLIB_ERR_SET_SECURITY;
+}
+
+/*
+ * Set metadata on an extracted file.
+ *
+ * @fd is an open file descriptor to the extracted file, or -1. @path is the
+ * path to the extracted file, or NULL. If valid, this function uses @fd.
+ * Otherwise, if valid, it uses @path. Otherwise, it calculates the path to one
+ * alias of the extracted file and uses it.
+ */
+static int
+unix_set_metadata(int fd, const struct wim_inode *inode,
+ const char *path, struct unix_apply_ctx *ctx)
+{
+ int ret;
+ struct wimlib_unix_data unix_data;
+
+ if (fd < 0 && !path)
+ path = unix_build_inode_extraction_path(inode, ctx);
+
+ if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA)
+ && inode_get_unix_data(inode, &unix_data))
+ {
+ u32 uid = unix_data.uid;
+ u32 gid = unix_data.gid;
+ u32 mode = unix_data.mode;
+
+ ret = unix_set_owner_and_group(fd, path, uid, gid);
+ if (ret) {
+ if (!path)
+ path = unix_build_inode_extraction_path(inode, ctx);
+ if (ctx->common.extract_flags &
+ WIMLIB_EXTRACT_FLAG_STRICT_ACLS)
+ {
+ ERROR_WITH_ERRNO("Can't set uid=%"PRIu32" and "
+ "gid=%"PRIu32" on \"%s\"",
+ uid, gid, path);
+ return ret;
+ } else {
+ WARNING_WITH_ERRNO("Can't set uid=%"PRIu32" and "
+ "gid=%"PRIu32" on \"%s\"",
+ uid, gid, path);
+ }
+ }
+
+ ret = 0;
+ if (!inode_is_symlink(inode))
+ ret = unix_set_mode(fd, path, mode);
+ if (ret) {
+ if (!path)
+ path = unix_build_inode_extraction_path(inode, ctx);
+ if (ctx->common.extract_flags &
+ WIMLIB_EXTRACT_FLAG_STRICT_ACLS)
+ {
+ ERROR_WITH_ERRNO("Can't set mode=0%"PRIo32" "
+ "on \"%s\"", mode, path);
+ return ret;
+ } else {
+ WARNING_WITH_ERRNO("Can't set mode=0%"PRIo32" "
+ "on \"%s\"", mode, path);
+ }
+ }
+ }
+
+ ret = unix_set_timestamps(fd, path,
+ inode->i_last_access_time,
+ inode->i_last_write_time);
+ if (ret) {
+ if (!path)
+ path = unix_build_inode_extraction_path(inode, ctx);
+ if (ctx->common.extract_flags &
+ WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS)
+ {
+ ERROR_WITH_ERRNO("Can't set timestamps on \"%s\"", path);
+ return ret;
+ } else {
+ WARNING_WITH_ERRNO("Can't set timestamps on \"%s\"", path);
+ }
+ }
return 0;
}
+/* Extract all needed aliases of the @inode, where one alias, corresponding to
+ * @first_dentry, has already been extracted to @first_path. */
static int
-unix_create_directory(const tchar *path, struct apply_ctx *ctx)
+unix_create_hardlinks(const struct wim_inode *inode,
+ const struct wim_dentry *first_dentry,
+ const char *first_path, struct unix_apply_ctx *ctx)
{
+ const struct wim_dentry *dentry;
+ const char *newpath;
+
+ list_for_each_entry(dentry, &inode->i_extraction_aliases,
+ d_extraction_alias_node)
+ {
+ if (dentry == first_dentry)
+ continue;
+
+ newpath = unix_build_extraction_path(dentry, ctx);
+ retry_link:
+ if (link(first_path, newpath)) {
+ if (errno == EEXIST && !unlink(newpath))
+ goto retry_link;
+ ERROR_WITH_ERRNO("Can't create hard link "
+ "\"%s\" => \"%s\"", newpath, first_path);
+ return WIMLIB_ERR_LINK;
+ }
+ unix_reuse_pathbuf(ctx);
+ }
+ return 0;
+}
+
+/* If @dentry represents a directory, create it. */
+static int
+unix_create_if_directory(const struct wim_dentry *dentry,
+ struct unix_apply_ctx *ctx)
+{
+ const char *path;
struct stat stbuf;
- if (mkdir(path, 0755)) {
- if (errno != EEXIST)
- return WIMLIB_ERR_MKDIR;
- if (lstat(path, &stbuf))
- return WIMLIB_ERR_STAT;
- errno = EEXIST;
- if (!S_ISDIR(stbuf.st_mode))
- return WIMLIB_ERR_NOTDIR;
+ if (!dentry_is_directory(dentry))
+ return 0;
+
+ path = unix_build_extraction_path(dentry, ctx);
+ if (mkdir(path, 0755) &&
+ /* It's okay if the path already exists, as long as it's a
+ * directory. */
+ !(errno == EEXIST && !lstat(path, &stbuf) && S_ISDIR(stbuf.st_mode)))
+ {
+ ERROR_WITH_ERRNO("Can't create directory \"%s\"", path);
+ return WIMLIB_ERR_MKDIR;
}
return 0;
}
+/* If @dentry represents an empty regular file or a special file, create it, set
+ * its metadata, and create any needed hard links. */
static int
-unix_create_hardlink(const tchar *oldpath, const tchar *newpath,
- struct apply_ctx *ctx)
+unix_extract_if_empty_file(const struct wim_dentry *dentry,
+ struct unix_apply_ctx *ctx)
{
- if (link(oldpath, newpath))
- return WIMLIB_ERR_LINK;
+ const struct wim_inode *inode;
+ struct wimlib_unix_data unix_data;
+ const char *path;
+ int ret;
+
+ inode = dentry->d_inode;
+
+ /* Extract all aliases only when the "first" comes up. */
+ if (dentry != inode_first_extraction_dentry(inode))
+ return 0;
+
+ /* Is this a directory, a symbolic link, or any type of nonempty file?
+ */
+ if (inode_is_directory(inode) || inode_is_symlink(inode) ||
+ inode_unnamed_lte_resolved(inode))
+ return 0;
+
+ /* Recognize special files in UNIX_DATA mode */
+ if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) &&
+ inode_get_unix_data(inode, &unix_data) &&
+ !S_ISREG(unix_data.mode))
+ {
+ path = unix_build_extraction_path(dentry, ctx);
+ retry_mknod:
+ if (mknod(path, unix_data.mode, unix_data.rdev)) {
+ if (errno == EPERM) {
+ WARNING_WITH_ERRNO("Can't create special "
+ "file \"%s\"", path);
+ ctx->num_special_files_ignored++;
+ return 0;
+ }
+ if (errno == EEXIST && !unlink(path))
+ goto retry_mknod;
+ ERROR_WITH_ERRNO("Can't create special file \"%s\"",
+ path);
+ return WIMLIB_ERR_MKNOD;
+ }
+ /* On special files, we can set timestamps immediately because
+ * we don't need to write any data to them. */
+ ret = unix_set_metadata(-1, inode, path, ctx);
+ } else {
+ int fd;
+
+ path = unix_build_extraction_path(dentry, ctx);
+ retry_create:
+ fd = open(path, O_TRUNC | O_CREAT | O_WRONLY | O_NOFOLLOW, 0644);
+ if (fd < 0) {
+ if (errno == EEXIST && !unlink(path))
+ goto retry_create;
+ ERROR_WITH_ERRNO("Can't create regular file \"%s\"", path);
+ return WIMLIB_ERR_OPEN;
+ }
+ /* On empty files, we can set timestamps immediately because we
+ * don't need to write any data to them. */
+ ret = unix_set_metadata(fd, inode, path, ctx);
+ if (close(fd) && !ret) {
+ ERROR_WITH_ERRNO("Error closing \"%s\"", path);
+ ret = WIMLIB_ERR_WRITE;
+ }
+ }
+ if (ret)
+ return ret;
+
+ return unix_create_hardlinks(inode, dentry, path, ctx);
+}
+
+static int
+unix_create_dirs_and_empty_files(const struct list_head *dentry_list,
+ struct unix_apply_ctx *ctx)
+{
+ const struct wim_dentry *dentry;
+ int ret;
+
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+ ret = unix_create_if_directory(dentry, ctx);
+ if (ret)
+ return ret;
+ }
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+ ret = unix_extract_if_empty_file(dentry, ctx);
+ if (ret)
+ return ret;
+ }
return 0;
}
static int
-unix_create_symlink(const tchar *oldpath, const tchar *newpath,
- struct apply_ctx *ctx)
+unix_create_symlink(const struct wim_inode *inode, const char *path,
+ const u8 *rpdata, u16 rpdatalen, bool rpfix,
+ const char *apply_dir, size_t apply_dir_nchars)
{
- if (symlink(oldpath, newpath))
+ char link_target[REPARSE_DATA_MAX_SIZE];
+ int ret;
+ struct wim_lookup_table_entry lte_override;
+
+ lte_override.resource_location = RESOURCE_IN_ATTACHED_BUFFER;
+ lte_override.attached_buffer = (void *)rpdata;
+ lte_override.size = rpdatalen;
+
+ ret = wim_inode_readlink(inode, link_target,
+ sizeof(link_target) - 1, <e_override);
+ if (ret < 0) {
+ errno = -ret;
+ return WIMLIB_ERR_READLINK;
+ }
+
+ link_target[ret] = 0;
+
+ if (rpfix && link_target[0] == '/') {
+
+ /* "Fix" the absolute symbolic link by prepending the absolute
+ * path to the target directory. */
+
+ if (sizeof(link_target) - (ret + 1) < apply_dir_nchars) {
+ errno = ENAMETOOLONG;
+ return WIMLIB_ERR_REPARSE_POINT_FIXUP_FAILED;
+ }
+ memmove(link_target + apply_dir_nchars, link_target,
+ ret + 1);
+ memcpy(link_target, apply_dir, apply_dir_nchars);
+ }
+retry_symlink:
+ if (symlink(link_target, path)) {
+ if (errno == EEXIST && !unlink(path))
+ goto retry_symlink;
return WIMLIB_ERR_LINK;
+ }
return 0;
}
+static void
+unix_cleanup_open_fds(struct unix_apply_ctx *ctx, unsigned offset)
+{
+ for (unsigned i = offset; i < ctx->num_open_fds; i++)
+ filedes_close(&ctx->open_fds[i]);
+ ctx->num_open_fds = 0;
+}
+
static int
-unix_extract_unnamed_stream(const tchar *path,
- struct wim_lookup_table_entry *lte,
- struct apply_ctx *ctx)
+unix_begin_extract_stream_instance(const struct wim_lookup_table_entry *stream,
+ const struct wim_inode *inode,
+ struct unix_apply_ctx *ctx)
{
- struct filedes fd;
- int raw_fd;
- int ret;
+ const struct wim_dentry *first_dentry;
+ const char *first_path;
+ int fd;
- raw_fd = open(path, O_WRONLY | O_TRUNC);
- if (raw_fd < 0)
+ if (inode_is_symlink(inode)) {
+ /* On UNIX, symbolic links must be created with symlink(), which
+ * requires that the full link target be available. */
+ if (stream->size > REPARSE_DATA_MAX_SIZE) {
+ ERROR_WITH_ERRNO("Reparse data of \"%s\" has size "
+ "%"PRIu64" bytes (exceeds %u bytes)",
+ inode_first_full_path(inode),
+ stream->size, REPARSE_DATA_MAX_SIZE);
+ return WIMLIB_ERR_INVALID_REPARSE_DATA;
+ }
+ ctx->reparse_ptr = ctx->reparse_data;
+ return 0;
+ }
+
+ if (ctx->num_open_fds == MAX_OPEN_FDS) {
+ ERROR("Can't extract data: too many open files!");
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+
+ first_dentry = inode_first_extraction_dentry(inode);
+ first_path = unix_build_extraction_path(first_dentry, ctx);
+retry_create:
+ fd = open(first_path, O_TRUNC | O_CREAT | O_WRONLY | O_NOFOLLOW, 0644);
+ if (fd < 0) {
+ if (errno == EEXIST && !unlink(first_path))
+ goto retry_create;
+ ERROR_WITH_ERRNO("Can't create regular file \"%s\"", first_path);
return WIMLIB_ERR_OPEN;
- filedes_init(&fd, raw_fd);
- ret = extract_wim_resource_to_fd(lte, &fd, wim_resource_size(lte));
- if (filedes_close(&fd) && !ret)
- ret = WIMLIB_ERR_WRITE;
+ }
+ filedes_init(&ctx->open_fds[ctx->num_open_fds++], fd);
+ return unix_create_hardlinks(inode, first_dentry, first_path, ctx);
+}
+
+/* Called when starting to read a single-instance stream for extraction */
+static int
+unix_begin_extract_stream(struct wim_lookup_table_entry *stream,
+ u32 flags, void *_ctx)
+{
+ struct unix_apply_ctx *ctx = _ctx;
+ const struct stream_owner *owners = stream_owners(stream);
+ int ret;
+
+ for (u32 i = 0; i < stream->out_refcnt; i++) {
+ const struct wim_inode *inode = owners[i].inode;
+
+ ret = unix_begin_extract_stream_instance(stream, inode, ctx);
+ if (ret) {
+ ctx->reparse_ptr = NULL;
+ unix_cleanup_open_fds(ctx, 0);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/* Called when the next chunk of a single-instance stream has been read for
+ * extraction */
+static int
+unix_extract_chunk(const void *chunk, size_t size, void *_ctx)
+{
+ struct unix_apply_ctx *ctx = _ctx;
+ int ret;
+
+ for (unsigned i = 0; i < ctx->num_open_fds; i++) {
+ ret = full_write(&ctx->open_fds[i], chunk, size);
+ if (ret) {
+ ERROR_WITH_ERRNO("Error writing data to filesystem");
+ return ret;
+ }
+ }
+ if (ctx->reparse_ptr)
+ ctx->reparse_ptr = mempcpy(ctx->reparse_ptr, chunk, size);
+ return 0;
+}
+
+/* Called when a single-instance stream has been fully read for extraction */
+static int
+unix_end_extract_stream(struct wim_lookup_table_entry *stream, int status,
+ void *_ctx)
+{
+ struct unix_apply_ctx *ctx = _ctx;
+ int ret;
+ unsigned j;
+ const struct stream_owner *owners = stream_owners(stream);
+
+ ctx->reparse_ptr = NULL;
+
+ if (status) {
+ unix_cleanup_open_fds(ctx, 0);
+ return status;
+ }
+
+ j = 0;
+ ret = 0;
+ for (u32 i = 0; i < stream->out_refcnt; i++) {
+ struct wim_inode *inode = owners[i].inode;
+
+ if (inode_is_symlink(inode)) {
+ /* We finally have the symlink data, so we can create
+ * the symlink. */
+ const char *path;
+ bool rpfix;
+
+ rpfix = (ctx->common.extract_flags &
+ WIMLIB_EXTRACT_FLAG_RPFIX) &&
+ !inode->i_not_rpfixed;
+
+ path = unix_build_inode_extraction_path(inode, ctx);
+ ret = unix_create_symlink(inode, path,
+ ctx->reparse_data,
+ stream->size,
+ rpfix,
+ ctx->target_abspath,
+ ctx->target_abspath_nchars);
+ if (ret) {
+ ERROR_WITH_ERRNO("Can't create symbolic link "
+ "\"%s\"", path);
+ break;
+ }
+ ret = unix_set_metadata(-1, inode, path, ctx);
+ if (ret)
+ break;
+ } else {
+ /* Set metadata on regular file just before closing it.
+ */
+ struct filedes *fd = &ctx->open_fds[j];
+
+ ret = unix_set_metadata(fd->fd, inode, NULL, ctx);
+ if (ret)
+ break;
+
+ if (filedes_close(fd)) {
+ ERROR_WITH_ERRNO("Error closing \"%s\"",
+ unix_build_inode_extraction_path(inode, ctx));
+ ret = WIMLIB_ERR_WRITE;
+ break;
+ }
+ j++;
+ }
+ }
+ unix_cleanup_open_fds(ctx, j);
return ret;
}
static int
-unix_set_unix_data(const tchar *path, const struct wimlib_unix_data *data,
- struct apply_ctx *ctx)
+unix_set_dir_metadata(struct list_head *dentry_list, struct unix_apply_ctx *ctx)
{
- struct stat stbuf;
+ const struct wim_dentry *dentry;
+ int ret;
- if (lstat(path, &stbuf))
- return WIMLIB_ERR_SET_SECURITY;
- if (!S_ISLNK(stbuf.st_mode))
- if (chmod(path, data->mode))
- return WIMLIB_ERR_SET_SECURITY;
- if (lchown(path, data->uid, data->gid))
- return WIMLIB_ERR_SET_SECURITY;
+ list_for_each_entry_reverse(dentry, dentry_list, d_extraction_list_node) {
+ if (dentry_is_directory(dentry)) {
+ ret = unix_set_metadata(-1, dentry->d_inode, NULL, ctx);
+ if (ret)
+ return ret;
+ }
+ }
return 0;
}
static int
-unix_set_timestamps(const tchar *path, u64 creation_time, u64 last_write_time,
- u64 last_access_time, struct apply_ctx *ctx)
+unix_extract(struct list_head *dentry_list, struct apply_ctx *_ctx)
{
int ret;
+ struct unix_apply_ctx *ctx = (struct unix_apply_ctx *)_ctx;
+ size_t path_max;
-#ifdef HAVE_UTIMENSAT
- /* Convert the WIM timestamps, which are accurate to 100 nanoseconds,
- * into `struct timespec's for passing to utimensat(), which is accurate
- * to 1 nanosecond. */
-
- struct timespec ts[2];
- ts[0] = wim_timestamp_to_timespec(last_access_time);
- ts[1] = wim_timestamp_to_timespec(last_write_time);
- ret = utimensat(AT_FDCWD, path, ts, AT_SYMLINK_NOFOLLOW);
+ /* Compute the maximum path length that will be needed, then allocate
+ * some path buffers. */
+ path_max = unix_compute_path_max(dentry_list, ctx);
+
+ for (unsigned i = 0; i < NUM_PATHBUFS; i++) {
+ ctx->pathbufs[i] = MALLOC(path_max);
+ if (!ctx->pathbufs[i]) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out;
+ }
+ /* Pre-fill the target in each path buffer. We'll just append
+ * the rest of the paths after this. */
+ memcpy(ctx->pathbufs[i],
+ ctx->common.target, ctx->common.target_nchars);
+ }
+
+ /* Extract directories and empty regular files. Directories are needed
+ * because we can't extract any other files until their directories
+ * exist. Empty files are needed because they don't have
+ * representatives in the stream list. */
+ ret = unix_create_dirs_and_empty_files(dentry_list, ctx);
if (ret)
- ret = errno;
-#else
- ret = ENOSYS;
-#endif
+ goto out;
- if (ret == ENOSYS) {
- /* utimensat() not implemented or not available */
- #ifdef HAVE_LUTIMES
- /* 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(last_access_time);
- tv[1] = wim_timestamp_to_timeval(last_write_time);
- ret = lutimes(path, tv);
- if (ret)
- ret = errno;
- #endif
- }
-
- 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(last_access_time);
- buf.modtime = wim_timestamp_to_unix(last_write_time);
- ret = utime(path, &buf);
- #endif
+ /* Get full path to target if needed for absolute symlink fixups. */
+ if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) &&
+ ctx->common.required_features.symlink_reparse_points)
+ {
+ ctx->target_abspath = realpath(ctx->common.target, NULL);
+ if (!ctx->target_abspath) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out;
+ }
+ ctx->target_abspath_nchars = strlen(ctx->target_abspath);
}
+
+ /* Extract nonempty regular files and symbolic links. */
+
+ struct read_stream_list_callbacks cbs = {
+ .begin_stream = unix_begin_extract_stream,
+ .begin_stream_ctx = ctx,
+ .consume_chunk = unix_extract_chunk,
+ .consume_chunk_ctx = ctx,
+ .end_stream = unix_end_extract_stream,
+ .end_stream_ctx = ctx,
+ };
+ ret = extract_stream_list(&ctx->common, &cbs);
if (ret)
- return WIMLIB_ERR_SET_TIMESTAMPS;
- return 0;
+ goto out;
+
+ /* Set directory metadata. We do this last so that we get the right
+ * directory timestamps. */
+ ret = unix_set_dir_metadata(dentry_list, ctx);
+ if (ret)
+ goto out;
+ if (ctx->num_special_files_ignored) {
+ WARNING("%lu special files were not extracted due to EPERM!",
+ ctx->num_special_files_ignored);
+ }
+out:
+ for (unsigned i = 0; i < NUM_PATHBUFS; i++)
+ FREE(ctx->pathbufs[i]);
+ FREE(ctx->target_abspath);
+ return ret;
}
const struct apply_operations unix_apply_ops = {
- .name = "UNIX",
-
- .start_extract = unix_start_extract,
- .create_file = unix_create_file,
- .create_directory = unix_create_directory,
- .create_hardlink = unix_create_hardlink,
- .create_symlink = unix_create_symlink,
- .extract_unnamed_stream = unix_extract_unnamed_stream,
- .set_unix_data = unix_set_unix_data,
- .set_timestamps = unix_set_timestamps,
-
- .path_separator = '/',
- .path_max = PATH_MAX,
-
- .requires_target_in_paths = 1,
- .supports_case_sensitive_filenames = 1,
+ .name = "UNIX",
+ .get_supported_features = unix_get_supported_features,
+ .extract = unix_extract,
+ .context_size = sizeof(struct unix_apply_ctx),
};
-
-#endif /* !__WIN32__ */
git://wimlib.net / wimlib / blobdiff