* 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.
*/
/*
#include "config.h"
-#if defined(__CYGWIN__) || defined(__WIN32__)
-#include <windows.h>
-# ifdef ERROR
-# undef ERROR
-# endif
-#include <wchar.h>
-#endif
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
#include <stdlib.h>
-#include <sys/time.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <unistd.h>
-#ifdef HAVE_UTIME_H
-#include <utime.h>
+#ifdef __WIN32__
+# include "win32.h"
#endif
-#include <unistd.h>
-
+#include "wimlib_internal.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>
-#endif
-
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#else
-#include <stdlib.h>
+# include <ntfs-3g/volume.h>
#endif
-#if defined(__CYGWIN__) || defined(__WIN32__)
-
-static int win32_set_reparse_data(HANDLE h,
- u32 reparse_tag,
- const struct wim_lookup_table_entry *lte,
- const wchar_t *path,
- const char *path_utf8)
-{
- int ret;
- u8 *buf;
- size_t len;
-
- if (!lte) {
- WARNING("\"%s\" is marked as a reparse point but had no reparse data",
- path_utf8);
- return 0;
- }
- len = wim_resource_size(lte);
- if (len > 16 * 1024 - 8) {
- WARNING("\"%s\": reparse data too long!", path_utf8);
- return 0;
- }
- buf = alloca(len + 8);
- ret = read_full_wim_resource(lte, buf + 8, 0);
- if (ret)
- return ret;
- *(u32*)(buf + 0) = reparse_tag;
- *(u16*)(buf + 4) = len;
- if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT, buf, len + 8,
- NULL, 0, NULL, NULL))
- {
- DWORD err = GetLastError();
- ERROR("Failed to set reparse data on \"%s\"",
- path_utf8);
- win32_error(err);
- ret = WIMLIB_ERR_WRITE;
- } else
- ret = 0;
- return ret;
-}
-
-
-static int win32_extract_chunk(const u8 *buf, size_t len, u64 offset, void *arg)
-{
- HANDLE hStream = arg;
-
- DWORD nbytes_written;
- wimlib_assert(len <= 0xffffffff);
-
- if (!WriteFile(hStream, buf, len, &nbytes_written, NULL) ||
- nbytes_written != len)
- {
- DWORD err = GetLastError();
- ERROR("WriteFile(): write error");
- win32_error(err);
- return WIMLIB_ERR_WRITE;
- }
- return 0;
-}
-
-static int do_win32_extract_stream(HANDLE hStream, struct wim_lookup_table_entry *lte)
-{
- return extract_wim_resource(lte, wim_resource_size(lte),
- win32_extract_chunk, hStream);
-}
-
-static int win32_extract_stream(const struct wim_inode *inode,
- const wchar_t *path,
- const wchar_t *stream_name_utf16,
- struct wim_lookup_table_entry *lte,
- const char *path_utf8)
-{
- wchar_t *stream_path;
- HANDLE h;
- int ret;
-
- if (stream_name_utf16) {
- size_t stream_path_nchars;
- size_t path_nchars = wcslen(path);
- size_t stream_name_nchars = wcslen(stream_name_utf16);
-
- stream_path_nchars = path_nchars + 1 + stream_name_nchars;
-
- stream_path = alloca((stream_path_nchars + 1) * sizeof(wchar_t));
-
- memcpy(stream_path, path, path_nchars * sizeof(wchar_t));
- stream_path[path_nchars] = L':';
- memcpy(&stream_path[path_nchars + 1], stream_name_utf16,
- stream_name_nchars * sizeof(wchar_t));
- stream_path[stream_path_nchars] = L'\0';
-
- /*wsprintf(stream_path, stream_path_nchars, L"%ls:%ls",*/
- /*path, stream_name_utf16);*/
- } else {
- stream_path = (wchar_t*)path;
- }
-
- h = CreateFileW(stream_path,
- GENERIC_WRITE | WRITE_OWNER | WRITE_DAC,
- 0,
- NULL,
- CREATE_ALWAYS,
- FILE_FLAG_OPEN_REPARSE_POINT |
- FILE_FLAG_BACKUP_SEMANTICS |
- inode->i_attributes,
- NULL);
- if (!h) {
- win32_error(GetLastError());
- ret = WIMLIB_ERR_OPEN;
- goto fail;
- }
-
- if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
- ret = win32_set_reparse_data(h, inode->i_reparse_tag,
- lte, path, path_utf8);
- if (ret)
- goto fail_close_handle;
- } else {
- if (lte) {
- ret = do_win32_extract_stream(h, lte);
- if (ret)
- goto fail_close_handle;
- }
- }
-
- if (!CloseHandle(h)) {
- win32_error(GetLastError());
- ret = WIMLIB_ERR_WRITE;
- goto fail;
- }
- ret = 0;
- goto out;
-fail_close_handle:
- CloseHandle(h);
-fail:
- ERROR("Error extracting %s", path_utf8);
-out:
- return ret;
-}
-
-static int win32_extract_streams(struct wim_inode *inode,
- const wchar_t *path,
- const char *path_utf8)
-{
- struct wim_lookup_table_entry *unnamed_lte;
- int ret;
-
- ret = win32_extract_stream(inode, path, NULL, unnamed_lte, path_utf8);
- if (ret)
- goto out;
-
- for (u16 i = 0; i < inode->i_num_ads; i++) {
- const struct wim_ads_entry *ads_entry = &inode->i_ads_entries[i];
- if (ads_entry->stream_name_len != 0) {
- ret = win32_extract_stream(inode,
- path,
- (const wchar_t*)ads_entry->stream_name,
- ads_entry->lte,
- path_utf8);
- if (ret)
- goto out;
- }
- }
- ret = 0;
-out:
- return ret;
-}
-
-static int win32_set_security_data(const struct wim_inode *inode,
- const wchar_t *path,
- const struct wim_security_data *sd,
- const char *path_utf8)
-{
- SECURITY_INFORMATION securityInformation = DACL_SECURITY_INFORMATION |
- SACL_SECURITY_INFORMATION |
- OWNER_SECURITY_INFORMATION |
- GROUP_SECURITY_INFORMATION;
- if (!SetFileSecurityW(path, securityInformation,
- (PSECURITY_DESCRIPTOR)sd->descriptors[inode->i_security_id]))
- {
- DWORD err = GetLastError();
- ERROR("Can't set security descriptor on \"%s\"", path_utf8);
- win32_error(err);
- return WIMLIB_ERR_WRITE;
- }
- return 0;
-}
-
-#else
-static int extract_regular_file_linked(struct wim_dentry *dentry,
- const char *output_path,
- struct apply_args *args,
- struct wim_lookup_table_entry *lte)
-{
- /* This mode overrides the normal hard-link extraction and
- * instead either symlinks or hardlinks *all* identical files in
- * the WIM, even if they are in a different image (in the case
- * of a multi-image extraction) */
-
- if (args->extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) {
- if (link(lte->extracted_file, output_path) != 0) {
- ERROR_WITH_ERRNO("Failed to hard link "
- "`%s' to `%s'",
- output_path, lte->extracted_file);
- return WIMLIB_ERR_LINK;
- }
- } else {
- int num_path_components;
- int num_output_dir_path_components;
- size_t extracted_file_len;
- char *p;
- const char *p2;
- size_t i;
-
- num_path_components =
- get_num_path_components(dentry->full_path_utf8) - 1;
- num_output_dir_path_components =
- get_num_path_components(args->target);
-
- if (args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) {
- num_path_components++;
- num_output_dir_path_components--;
- }
- extracted_file_len = strlen(lte->extracted_file);
-
- char buf[extracted_file_len + 3 * num_path_components + 1];
- p = &buf[0];
-
- for (i = 0; i < num_path_components; i++) {
- *p++ = '.';
- *p++ = '.';
- *p++ = '/';
- }
- p2 = lte->extracted_file;
- while (*p2 == '/')
- p2++;
- while (num_output_dir_path_components--)
- p2 = path_next_part(p2, NULL);
- strcpy(p, p2);
- if (symlink(buf, output_path) != 0) {
- ERROR_WITH_ERRNO("Failed to symlink `%s' to "
- "`%s'",
- buf, lte->extracted_file);
- return WIMLIB_ERR_LINK;
- }
- }
- 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,
- struct wim_lookup_table_entry *lte)
-{
- /* Normal mode of extraction. Regular files and hard links are
- * extracted in the way that they appear in the WIM. */
-
- int out_fd;
- int ret;
- struct wim_inode *inode = dentry->d_inode;
-
- if (!((args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE)
- && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
- WIMLIB_EXTRACT_FLAG_HARDLINK))))
- {
- /* If the dentry is part of a hard link set of at least 2
- * dentries and one of the other dentries has already been
- * extracted, make a hard link to the file corresponding to this
- * already-extracted directory. Otherwise, extract the file and
- * set the inode->i_extracted_file field so that other dentries
- * in the hard link group can link to it. */
- if (inode->i_nlink > 1) {
- if (inode->i_extracted_file) {
- DEBUG("Extracting hard link `%s' => `%s'",
- output_path, inode->i_extracted_file);
- if (link(inode->i_extracted_file, output_path) != 0) {
- ERROR_WITH_ERRNO("Failed to hard link "
- "`%s' to `%s'",
- output_path,
- inode->i_extracted_file);
- return WIMLIB_ERR_LINK;
- }
- return 0;
- }
- FREE(inode->i_extracted_file);
- inode->i_extracted_file = STRDUP(output_path);
- if (!inode->i_extracted_file) {
- ERROR("Failed to allocate memory for filename");
- return WIMLIB_ERR_NOMEM;
- }
- }
- }
-
- /* Extract the contents of the file to @output_path. */
-
- out_fd = open(output_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
- if (out_fd == -1) {
- ERROR_WITH_ERRNO("Failed to open the file `%s' for writing",
- output_path);
- return WIMLIB_ERR_OPEN;
- }
-
- if (!lte) {
- /* Empty file with no lookup table entry */
- DEBUG("Empty file `%s'.", output_path);
- ret = 0;
- goto out_extract_unix_data;
- }
-
- ret = extract_wim_resource_to_fd(lte, out_fd, wim_resource_size(lte));
- if (ret != 0) {
- ERROR("Failed to extract resource to `%s'", output_path);
- goto out;
- }
-
-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);
- if (ret == 0)
- ret = WIMLIB_ERR_WRITE;
- }
- return ret;
-}
-
-static int extract_regular_file(struct wim_dentry *dentry,
- struct apply_args *args,
- const char *output_path)
+static int
+do_apply_op(struct wim_dentry *dentry, struct apply_args *args,
+ int (*apply_dentry_func)(const tchar *, size_t,
+ struct wim_dentry *, struct apply_args *))
{
- struct wim_lookup_table_entry *lte;
- const struct wim_inode *inode = dentry->d_inode;
-
- lte = inode_unnamed_lte_resolved(inode);
-
- if (lte && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
- WIMLIB_EXTRACT_FLAG_HARDLINK)))
- {
- if (lte->extracted_file) {
- return extract_regular_file_linked(dentry, output_path, args, lte);
- } else {
- lte->extracted_file = STRDUP(output_path);
- if (!lte->extracted_file)
- return WIMLIB_ERR_NOMEM;
- }
- }
- return extract_regular_file_unlinked(dentry, args, output_path, lte);
-}
-
-static int extract_symlink(struct wim_dentry *dentry,
- struct apply_args *args,
- const char *output_path)
-{
- char target[4096];
- ssize_t ret = inode_readlink(dentry->d_inode, target,
- sizeof(target), args->w, 0);
- struct wim_lookup_table_entry *lte;
-
- if (ret <= 0) {
- ERROR("Could not read the symbolic link from dentry `%s'",
- dentry->full_path_utf8);
- return WIMLIB_ERR_INVALID_DENTRY;
- }
- ret = symlink(target, output_path);
- if (ret != 0) {
- ERROR_WITH_ERRNO("Failed to symlink `%s' to `%s'",
- output_path, target);
- 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;
+ tchar *p;
+ const tchar *full_path;
+ size_t full_path_nchars;
+
+ wimlib_assert(dentry->_full_path != NULL);
+ full_path = dentry->_full_path + 1;
+ full_path_nchars = dentry->full_path_nbytes / sizeof(tchar) - 1;
+ tchar output_path[args->target_nchars + 1 +
+ (full_path_nchars - args->wim_source_path_nchars) + 1];
+ p = output_path;
+
+ tmemcpy(p, args->target, args->target_nchars);
+ p += args->target_nchars;
+
+ if (dentry != args->extract_root) {
+ *p++ = T('/');
+ tmemcpy(p, full_path + args->wim_source_path_nchars,
+ full_path_nchars - args->wim_source_path_nchars);
+ p += full_path_nchars - args->wim_source_path_nchars;
+ }
+ *p = T('\0');
+ return (*apply_dentry_func)(output_path, p - output_path,
+ dentry, args);
}
-#endif /* !__CYGWIN__ && !__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);*/
- goto dir_exists;
- } else {
- ERROR("`%s' is not a directory", output_path);
- return WIMLIB_ERR_MKDIR;
- }
- } else {
- if (errno != ENOENT) {
- ERROR_WITH_ERRNO("Failed to stat `%s'", output_path);
- return WIMLIB_ERR_STAT;
- }
- }
- if (mkdir(output_path, S_IRWXU | S_IRGRP | S_IXGRP |
- S_IROTH | S_IXOTH) != 0) {
- ERROR_WITH_ERRNO("Cannot create directory `%s'",
- output_path);
- return WIMLIB_ERR_MKDIR;
- }
-dir_exists:
- 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);
- } else {
- ret = 0;
- }
- return ret;
-}
/* Extracts a file, directory, or symbolic link from the WIM archive. */
-static int apply_dentry_normal(struct wim_dentry *dentry, void *arg)
+static int
+apply_dentry_normal(struct wim_dentry *dentry, void *arg)
{
- 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';
-
-#if defined(__CYGWIN__) || defined(__WIN32__)
- char *utf16_path;
- size_t utf16_path_len;
- DWORD err;
- int ret;
- ret = utf8_to_utf16(output_path, len + dentry->full_path_utf8_len,
- &utf16_path, &utf16_path_len);
- if (ret)
- return ret;
-
- if (inode->i_nlink > 1 && inode->i_extracted_file != NULL) {
- /* Linked file, with another name already extracted */
- if (!CreateHardLinkW((const wchar_t*)inode->i_extracted_file,
- (const wchar_t*)utf16_path,
- NULL))
- {
- err = GetLastError();
- ERROR("Can't create hard link \"%s\"", output_path);
- ret = WIMLIB_ERR_LINK;
- win32_error(err);
- goto out_free_utf16_path;
- }
- ret = 0;
- goto out_free_utf16_path;
- }
- ret = win32_extract_streams(inode, (const wchar_t*)utf16_path,
- output_path);
- if (ret)
- goto out_free_utf16_path;
-
- if (inode->i_security_id != -1) {
- ret = win32_set_security_data(inode,
- (const wchar_t*)utf16_path,
- wim_const_security_data(args->w),
- output_path);
- if (ret)
- goto out_free_utf16_path;
- }
-
- /*if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {*/
- /*ret = win32_set_reparse_data(inode, path, output_path);*/
- /*if (ret)*/
- /*goto out_free_utf16_path;*/
- /*}*/
-
- if (inode->i_nlink > 1) {
- inode->i_extracted_file = utf16_path;
- utf16_path = NULL;
- }
- ret = 0;
-out_free_utf16_path:
- FREE(utf16_path);
- return ret;
+#ifdef __WIN32__
+ return do_apply_op(dentry, arg, win32_do_apply_dentry);
#else
- if (inode_is_symlink(inode))
- return extract_symlink(dentry, args, output_path);
- else if (inode_is_directory(inode))
- 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);
+ return do_apply_op(dentry, arg, unix_do_apply_dentry);
#endif
}
+
/* Apply timestamps to an extracted file or directory */
-static int apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
+static int
+apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
{
- 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;
-
- 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';
-
-#if defined(__CYGWIN__) || defined(__WIN32__)
- /* Win32 */
- char *utf16_path;
- size_t utf16_path_len;
- DWORD err;
- HANDLE h;
- BOOL bret1, bret2;
-
- ret = utf8_to_utf16(output_path, len + dentry->full_path_utf8_len,
- &utf16_path, &utf16_path_len);
- if (ret)
- return ret;
- h = CreateFile(utf16_path, GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
- FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
- NULL);
-
- if (!h)
- err = GetLastError();
- FREE(utf16_path);
- if (!h)
- goto fail;
-
- FILETIME creationTime = {.dwLowDateTime = dentry->d_inode->i_creation_time & 0xffffffff,
- .dwHighDateTime = dentry->d_inode->i_creation_time >> 32};
- FILETIME lastAccessTime = {.dwLowDateTime = dentry->d_inode->i_last_access_time & 0xffffffff,
- .dwHighDateTime = dentry->d_inode->i_last_access_time >> 32};
- FILETIME lastWriteTime = {.dwLowDateTime = dentry->d_inode->i_last_write_time & 0xffffffff,
- .dwHighDateTime = dentry->d_inode->i_last_write_time >> 32};
-
- if (!SetFileTime(h, &creationTime, &lastAccessTime, &lastWriteTime)) {
- err = GetLastError();
- CloseHandle(h);
- goto fail;
- }
- if (!CloseHandle(h)) {
- err = GetLastError();
- goto fail;
- }
- return 0;
-fail:
- err = GetLastError();
- ERROR("Can't set timestamps on \"%s\"", output_path);
- win32_error(err);
- return WIMLIB_ERR_WRITE;
+#ifdef __WIN32__
+ return do_apply_op(dentry, arg, win32_do_apply_dentry_timestamps);
#else
- /* UNIX */
-
- /* 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]);
- #ifdef HAVE_LUTIMES
- ret = lutimes(output_path, tv);
- #else
- ret = -1;
- errno = ENOSYS;
- #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++;
- }
- }
- return 0;
+ return do_apply_op(dentry, arg, unix_do_apply_dentry_timestamps);
#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. */
-static int maybe_apply_dentry(struct wim_dentry *dentry, void *arg)
+/* Extract a dentry if it hasn't already been extracted and either
+ * WIMLIB_EXTRACT_FLAG_NO_STREAMS is not specified, or the dentry is a directory
+ * and/or has no unnamed stream. */
+static int
+maybe_apply_dentry(struct wim_dentry *dentry, void *arg)
{
struct apply_args *args = arg;
int ret;
- if (dentry->is_extracted)
+ if (!dentry->needs_extraction)
return 0;
- if (args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS)
- if (inode_unnamed_lte_resolved(dentry->d_inode))
- return 0;
+ if (args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS &&
+ !dentry_is_directory(dentry) &&
+ inode_unnamed_lte_resolved(dentry->d_inode) != NULL)
+ return 0;
if ((args->extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) &&
args->progress_func) {
- args->progress.extract.cur_path = dentry->full_path_utf8;
+ args->progress.extract.cur_path = dentry->_full_path;
args->progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY,
&args->progress);
}
ret = args->apply_dentry(dentry, args);
if (ret == 0)
- dentry->is_extracted = 1;
+ dentry->needs_extraction = 0;
return ret;
}
-static int cmp_streams_by_wim_position(const void *p1, const void *p2)
-{
- const struct wim_lookup_table_entry *lte1, *lte2;
- lte1 = *(const struct wim_lookup_table_entry**)p1;
- lte2 = *(const struct wim_lookup_table_entry**)p2;
- if (lte1->resource_entry.offset < lte2->resource_entry.offset)
- return -1;
- else if (lte1->resource_entry.offset > lte2->resource_entry.offset)
- return 1;
- else
- return 0;
-}
-
-static int sort_stream_list_by_wim_position(struct list_head *stream_list)
-{
- struct list_head *cur;
- size_t num_streams;
- struct wim_lookup_table_entry **array;
- size_t i;
- size_t array_size;
-
- num_streams = 0;
- list_for_each(cur, stream_list)
- num_streams++;
- array_size = num_streams * sizeof(array[0]);
- array = MALLOC(array_size);
- if (!array) {
- ERROR("Failed to allocate %zu bytes to sort stream entries",
- array_size);
- return WIMLIB_ERR_NOMEM;
- }
- cur = stream_list->next;
- for (i = 0; i < num_streams; i++) {
- array[i] = container_of(cur, struct wim_lookup_table_entry, staging_list);
- cur = cur->next;
- }
-
- qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position);
-
- INIT_LIST_HEAD(stream_list);
- for (i = 0; i < num_streams; i++)
- list_add_tail(&array[i]->staging_list, stream_list);
- FREE(array);
- return 0;
-}
-
-static void calculate_bytes_to_extract(struct list_head *stream_list,
- int extract_flags,
- union wimlib_progress_info *progress)
+static void
+calculate_bytes_to_extract(struct list_head *stream_list,
+ int extract_flags,
+ union wimlib_progress_info *progress)
{
struct wim_lookup_table_entry *lte;
u64 total_bytes = 0;
u64 num_streams = 0;
/* For each stream to be extracted... */
- list_for_each_entry(lte, stream_list, staging_list) {
+ list_for_each_entry(lte, stream_list, extraction_list) {
if (extract_flags &
(WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
{
progress->extract.completed_bytes = 0;
}
-static void maybe_add_stream_for_extraction(struct wim_lookup_table_entry *lte,
- struct list_head *stream_list)
+static void
+maybe_add_stream_for_extraction(struct wim_lookup_table_entry *lte,
+ struct list_head *stream_list)
{
if (++lte->out_refcnt == 1) {
- INIT_LIST_HEAD(<e->inode_list);
- list_add_tail(<e->staging_list, stream_list);
+ INIT_LIST_HEAD(<e->lte_dentry_list);
+ list_add_tail(<e->extraction_list, stream_list);
}
}
-static void inode_find_streams_for_extraction(struct wim_inode *inode,
- struct list_head *stream_list,
- int extract_flags)
+struct find_streams_ctx {
+ struct list_head stream_list;
+ int extract_flags;
+};
+
+static int
+dentry_find_streams_to_extract(struct wim_dentry *dentry, void *_ctx)
{
+ struct find_streams_ctx *ctx = _ctx;
+ struct wim_inode *inode = dentry->d_inode;
struct wim_lookup_table_entry *lte;
- bool inode_added = false;
+ bool dentry_added = false;
+ struct list_head *stream_list = &ctx->stream_list;
+ int extract_flags = ctx->extract_flags;
+
+ dentry->needs_extraction = 1;
lte = inode_unnamed_lte_resolved(inode);
if (lte) {
- maybe_add_stream_for_extraction(lte, stream_list);
- list_add_tail(&inode->i_lte_inode_list, <e->inode_list);
- inode_added = true;
+ if (!inode->i_visited)
+ maybe_add_stream_for_extraction(lte, stream_list);
+ list_add_tail(&dentry->tmp_list, <e->lte_dentry_list);
+ dentry_added = true;
}
-#ifdef WITH_NTFS_3G
- if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
+
+ /* Determine whether to include alternate data stream entries or not.
+ *
+ * UNIX: Include them if extracting using NTFS-3g.
+ *
+ * Windows: Include them undconditionally, although if the filesystem is
+ * not NTFS we won't actually be able to extract them. */
+#if defined(WITH_NTFS_3G)
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS)
+#elif defined(__WIN32__)
+ if (1)
+#else
+ if (0)
+#endif
+ {
for (unsigned i = 0; i < inode->i_num_ads; i++) {
- if (inode->i_ads_entries[i].stream_name_len != 0) {
+ if (inode->i_ads_entries[i].stream_name_nbytes != 0) {
lte = inode->i_ads_entries[i].lte;
if (lte) {
- maybe_add_stream_for_extraction(lte,
- stream_list);
- if (!inode_added) {
- list_add_tail(&inode->i_lte_inode_list,
- <e->inode_list);
- inode_added = true;
+ if (!inode->i_visited) {
+ maybe_add_stream_for_extraction(lte,
+ stream_list);
+ }
+ if (!dentry_added) {
+ list_add_tail(&dentry->tmp_list,
+ <e->lte_dentry_list);
+ dentry_added = true;
}
}
}
}
}
-#endif
+ inode->i_visited = 1;
+ return 0;
}
-static void find_streams_for_extraction(struct hlist_head *inode_list,
- struct list_head *stream_list,
- struct wim_lookup_table *lookup_table,
- int extract_flags)
+static int
+dentry_resolve_and_zero_lte_refcnt(struct wim_dentry *dentry, void *_lookup_table)
{
- struct wim_inode *inode;
- struct hlist_node *cur;
- struct wim_dentry *dentry;
+ struct wim_inode *inode = dentry->d_inode;
+ struct wim_lookup_table *lookup_table = _lookup_table;
+ struct wim_lookup_table_entry *lte;
- for_lookup_table_entry(lookup_table, lte_zero_out_refcnt, NULL);
- INIT_LIST_HEAD(stream_list);
- hlist_for_each_entry(inode, cur, inode_list, i_hlist) {
- if (!inode->i_resolved)
- inode_resolve_ltes(inode, lookup_table);
- inode_for_each_dentry(dentry, inode)
- dentry->is_extracted = 0;
- inode_find_streams_for_extraction(inode, stream_list,
- extract_flags);
+ inode_resolve_ltes(inode, lookup_table);
+ for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+ lte = inode_stream_lte_resolved(inode, i);
+ if (lte)
+ lte->out_refcnt = 0;
}
+ return 0;
+}
+
+static void
+find_streams_for_extraction(struct wim_dentry *root,
+ struct list_head *stream_list,
+ struct wim_lookup_table *lookup_table,
+ int extract_flags)
+{
+ struct find_streams_ctx ctx;
+
+ INIT_LIST_HEAD(&ctx.stream_list);
+ ctx.extract_flags = extract_flags;
+ for_dentry_in_tree(root, dentry_resolve_and_zero_lte_refcnt, lookup_table);
+ for_dentry_in_tree(root, dentry_find_streams_to_extract, &ctx);
+ list_transfer(&ctx.stream_list, stream_list);
+}
+
+static int
+dentry_reset_needs_extraction(struct wim_dentry *dentry, void *_ignore)
+{
+ dentry->needs_extraction = 0;
+ dentry->d_inode->i_visited = 0;
+ return 0;
}
struct apply_operations {
};
#endif
-static int apply_stream_list(struct list_head *stream_list,
- struct apply_args *args,
- const struct apply_operations *ops,
- wimlib_progress_func_t progress_func)
+static int
+apply_stream_list(struct list_head *stream_list,
+ struct apply_args *args,
+ const struct apply_operations *ops,
+ wimlib_progress_func_t progress_func)
{
uint64_t bytes_per_progress = args->progress.extract.total_bytes / 100;
uint64_t next_progress = bytes_per_progress;
struct wim_lookup_table_entry *lte;
- struct wim_inode *inode;
struct wim_dentry *dentry;
int ret;
* sequential reading of the WIM can be implemented. */
/* For each distinct stream to be extracted */
- list_for_each_entry(lte, stream_list, staging_list) {
- /* For each inode that contains the stream */
- list_for_each_entry(inode, <e->inode_list, i_lte_inode_list) {
- /* For each dentry that points to the inode */
- inode_for_each_dentry(dentry, inode) {
- /* Extract the dentry if it was not already
- * extracted */
- ret = maybe_apply_dentry(dentry, args);
- if (ret != 0)
- return ret;
- if (progress_func &&
- args->progress.extract.completed_bytes >= next_progress)
+ list_for_each_entry(lte, stream_list, extraction_list) {
+ /* For each dentry to be extracted that is a name for an inode
+ * containing the stream */
+ list_for_each_entry(dentry, <e->lte_dentry_list, tmp_list) {
+ /* Extract the dentry if it was not already
+ * extracted */
+ ret = maybe_apply_dentry(dentry, args);
+ if (ret)
+ return ret;
+ if (progress_func &&
+ args->progress.extract.completed_bytes >= next_progress)
+ {
+ progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS,
+ &args->progress);
+ if (args->progress.extract.completed_bytes >=
+ args->progress.extract.total_bytes)
{
- progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS,
- &args->progress);
- if (args->progress.extract.completed_bytes >=
- args->progress.extract.total_bytes)
- {
- next_progress = ~0ULL;
- } else {
- next_progress =
- min (args->progress.extract.completed_bytes +
- bytes_per_progress,
- args->progress.extract.total_bytes);
- }
+ next_progress = ~0ULL;
+ } else {
+ next_progress =
+ min (args->progress.extract.completed_bytes +
+ bytes_per_progress,
+ args->progress.extract.total_bytes);
}
}
}
return 0;
}
-/* Extracts the image @image from the WIM @w to the directory or NTFS volume
- * @target. */
-static int extract_single_image(WIMStruct *w, int image,
- const char *target, int extract_flags,
- wimlib_progress_func_t progress_func)
+static int
+sort_stream_list_by_wim_position(struct list_head *stream_list)
+{
+ struct list_head *cur;
+ size_t num_streams;
+ struct wim_lookup_table_entry **array;
+ size_t i;
+ size_t array_size;
+
+ num_streams = 0;
+ list_for_each(cur, stream_list)
+ num_streams++;
+ array_size = num_streams * sizeof(array[0]);
+ array = MALLOC(array_size);
+ if (!array) {
+ ERROR("Failed to allocate %zu bytes to sort stream entries",
+ array_size);
+ return WIMLIB_ERR_NOMEM;
+ }
+ cur = stream_list->next;
+ for (i = 0; i < num_streams; i++) {
+ array[i] = container_of(cur, struct wim_lookup_table_entry, extraction_list);
+ cur = cur->next;
+ }
+
+ qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position);
+
+ INIT_LIST_HEAD(stream_list);
+ for (i = 0; i < num_streams; i++)
+ list_add_tail(&array[i]->extraction_list, stream_list);
+ FREE(array);
+ return 0;
+}
+
+/*
+ * Extract a dentry to standard output.
+ *
+ * This obviously doesn't make sense in all cases. We return an error if the
+ * dentry does not correspond to a regular file. Otherwise we extract the
+ * unnamed data stream only.
+ */
+static int
+extract_dentry_to_stdout(struct wim_dentry *dentry)
+{
+ int ret = 0;
+ if (!dentry_is_regular_file(dentry)) {
+ ERROR("\"%"TS"\" is not a regular file and therefore cannot be "
+ "extracted to standard output", dentry->_full_path);
+ ret = WIMLIB_ERR_NOT_A_REGULAR_FILE;
+ } else {
+ struct wim_lookup_table_entry *lte;
+
+ lte = inode_unnamed_lte_resolved(dentry->d_inode);
+ if (lte) {
+ ret = extract_wim_resource_to_fd(lte, STDOUT_FILENO,
+ wim_resource_size(lte));
+ }
+ }
+ return ret;
+}
+
+/*
+ * extract_tree - Extract a file or directory tree from the currently selected
+ * WIM image.
+ *
+ * @wim: WIMStruct for the WIM file, with the desired image selected
+ * (as wim->current_image).
+ * @wim_source_path:
+ * "Canonical" (i.e. no leading or trailing slashes, path
+ * separators forwald slashes) path inside the WIM image to
+ * extract. An empty string means the full image.
+ * @target:
+ * Filesystem path to extract the file or directory tree to.
+ *
+ * @extract_flags:
+ * WIMLIB_EXTRACT_FLAG_*. Also, the private flag
+ * WIMLIB_EXTRACT_FLAG_MULTI_IMAGE will be set if this is being
+ * called through wimlib_extract_image() with WIMLIB_ALL_IMAGES as
+ * the image.
+ *
+ * @progress_func:
+ * If non-NULL, progress function for the extraction. The messages
+ * we may in this function are:
+ *
+ * WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN or
+ * WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN;
+ * WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN;
+ * WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END;
+ * WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY;
+ * WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS;
+ * WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS;
+ * WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END or
+ * WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END.
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
+static int
+extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target,
+ int extract_flags, wimlib_progress_func_t progress_func)
{
int ret;
struct list_head stream_list;
- struct hlist_head *inode_list;
-
struct apply_args args;
const struct apply_operations *ops;
+ struct wim_dentry *root;
- 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;
+ memset(&args, 0, sizeof(args));
+
+ args.w = wim;
+ args.target = target;
+ args.extract_flags = extract_flags;
+ args.progress_func = progress_func;
+ args.target_nchars = tstrlen(target);
+ args.wim_source_path_nchars = tstrlen(wim_source_path);
if (progress_func) {
- args.progress.extract.wimfile_name = w->filename;
- args.progress.extract.image = image;
+ args.progress.extract.wimfile_name = wim->filename;
+ args.progress.extract.image = wim->current_image;
args.progress.extract.extract_flags = (extract_flags &
WIMLIB_EXTRACT_MASK_PUBLIC);
- args.progress.extract.image_name = wimlib_get_image_name(w, image);
+ args.progress.extract.image_name = wimlib_get_image_name(wim,
+ wim->current_image);
+ args.progress.extract.extract_root_wim_source_path = wim_source_path;
args.progress.extract.target = target;
}
if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
args.vol = ntfs_mount(target, 0);
if (!args.vol) {
- ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", target);
- return WIMLIB_ERR_NTFS_3G;
+ ERROR_WITH_ERRNO("Failed to mount NTFS volume `%"TS"'",
+ target);
+ ret = WIMLIB_ERR_NTFS_3G;
+ goto out;
}
ops = &ntfs_apply_operations;
} else
#endif
ops = &normal_apply_operations;
- ret = select_wim_image(w, image);
- if (ret != 0)
- goto out;
+ root = get_dentry(wim, wim_source_path);
+ if (!root) {
+ ERROR("Path \"%"TS"\" does not exist in WIM image %d",
+ wim_source_path, wim->current_image);
+ ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST;
+ goto out_ntfs_umount;
+ }
+ args.extract_root = root;
- inode_list = &w->image_metadata[image - 1].inode_list;
+ ret = calculate_dentry_tree_full_paths(root);
+ if (ret)
+ goto out_ntfs_umount;
/* Build a list of the streams that need to be extracted */
- find_streams_for_extraction(inode_list, &stream_list,
- w->lookup_table, extract_flags);
+ find_streams_for_extraction(root,
+ &stream_list,
+ wim->lookup_table, extract_flags);
/* Calculate the number of bytes of data that will be extracted */
calculate_bytes_to_extract(&stream_list, extract_flags,
&args.progress);
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT) {
+ ret = extract_dentry_to_stdout(root);
+ goto out_dentry_reset_needs_extraction;
+ }
+
if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN,
+ progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN :
+ WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN,
&args.progress);
}
/* Make the directory structure and extract empty files */
args.extract_flags |= WIMLIB_EXTRACT_FLAG_NO_STREAMS;
args.apply_dentry = ops->apply_dentry;
- ret = for_dentry_in_tree(wim_root_dentry(w), maybe_apply_dentry, &args);
+ ret = for_dentry_in_tree(root, maybe_apply_dentry, &args);
args.extract_flags &= ~WIMLIB_EXTRACT_FLAG_NO_STREAMS;
- if (ret != 0)
- goto out;
+ if (ret)
+ goto out_dentry_reset_needs_extraction;
if (progress_func) {
progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END,
&args.progress);
}
+ if (extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) {
+ args.target_realpath = realpath(target, NULL);
+ if (!args.target_realpath) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_dentry_reset_needs_extraction;
+ }
+ args.target_realpath_len = tstrlen(args.target_realpath);
+ }
+
/* Extract non-empty files */
ret = apply_stream_list(&stream_list, &args, ops, progress_func);
- if (ret != 0)
- goto out;
+ if (ret)
+ goto out_free_target_realpath;
if (progress_func) {
progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS,
}
/* Apply timestamps */
- ret = for_dentry_in_tree_depth(wim_root_dentry(w),
+ ret = for_dentry_in_tree_depth(root,
ops->apply_dentry_timestamps, &args);
- if (ret != 0)
- goto out;
+ if (ret)
+ goto out_free_target_realpath;
if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END,
+ progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END :
+ WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END,
&args.progress);
}
-out:
+out_free_target_realpath:
+ FREE(args.target_realpath);
+out_dentry_reset_needs_extraction:
+ for_dentry_in_tree(root, dentry_reset_needs_extraction, NULL);
+out_ntfs_umount:
#ifdef WITH_NTFS_3G
/* Unmount the NTFS volume */
if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
if (ntfs_umount(args.vol, FALSE) != 0) {
- ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", args.target);
+ ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%"TS"'",
+ args.target);
if (ret == 0)
ret = WIMLIB_ERR_NTFS_3G;
}
}
#endif
+out:
return ret;
}
-
-/* Extracts all images from the WIM to the directory @target, with the images
- * placed in subdirectories named by their image names. */
-static int extract_all_images(WIMStruct *w, const char *target,
- int extract_flags,
- wimlib_progress_func_t progress_func)
+/* Validates a single wimlib_extract_command, mostly checking to make sure the
+ * extract flags make sense. */
+static int
+check_extract_command(struct wimlib_extract_command *cmd, int wim_header_flags)
{
- size_t image_name_max_len = max(xml_get_max_image_name_len(w), 20);
- size_t output_path_len = strlen(target);
- char buf[output_path_len + 1 + image_name_max_len + 1];
- int ret;
- int image;
- const char *image_name;
+ int extract_flags;
+ bool is_entire_image = (cmd->wim_source_path[0] == T('\0'));
- ret = extract_directory(NULL, target, true);
- if (ret != 0)
- return ret;
-
- memcpy(buf, target, output_path_len);
- buf[output_path_len] = '/';
- for (image = 1; image <= w->hdr.image_count; image++) {
- image_name = wimlib_get_image_name(w, image);
- if (image_name && *image_name) {
- strcpy(buf + output_path_len + 1, image_name);
- } else {
- /* Image name is empty. Use image number instead */
- sprintf(buf + output_path_len + 1, "%d", image);
- }
- ret = extract_single_image(w, image, buf, extract_flags,
- progress_func);
- if (ret != 0)
- return ret;
- }
- return 0;
-}
-
-/* Extracts a single image or all images from a WIM file to a directory or NTFS
- * volume. */
-WIMLIBAPI int wimlib_extract_image(WIMStruct *w,
- int image,
- const char *target,
- int extract_flags,
- WIMStruct **additional_swms,
- unsigned num_additional_swms,
- wimlib_progress_func_t progress_func)
-{
- struct wim_lookup_table *joined_tab, *w_tab_save;
- int ret;
-
- if (!target)
+ /* Empty destination path? */
+ if (cmd->fs_dest_path[0] == T('\0'))
return WIMLIB_ERR_INVALID_PARAM;
- extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
+ extract_flags = cmd->extract_flags;
- if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
- == (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
+ /* Specified both symlink and hardlink modes? */
+ if ((extract_flags &
+ (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK)) == (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK))
return WIMLIB_ERR_INVALID_PARAM;
-#if defined(__CYGWIN__) || defined(__WIN32__)
+#ifdef __WIN32__
+ /* Wanted UNIX data on Windows? */
if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
ERROR("Extracting UNIX data is not supported on Windows");
return WIMLIB_ERR_INVALID_PARAM;
}
+ /* Wanted linked extraction on Windows? (XXX This is possible, just not
+ * implemented yet.) */
+ 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) {
+ /* NTFS-3g extraction mode requested */
#ifdef WITH_NTFS_3G
- if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))) {
+ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK))) {
ERROR("Cannot specify symlink or hardlink flags when applying\n"
" directly to a NTFS volume");
return WIMLIB_ERR_INVALID_PARAM;
}
- if (image == WIMLIB_ALL_IMAGES) {
- ERROR("Can only apply a single image when applying "
- "directly to a NTFS volume");
+ if (!is_entire_image &&
+ (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS))
+ {
+ ERROR("When applying directly to a NTFS volume you can "
+ "only extract a full image, not part of one");
return WIMLIB_ERR_INVALID_PARAM;
}
if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
- ERROR("Cannot restore UNIX-specific data in the NTFS extraction mode");
+ ERROR("Cannot restore UNIX-specific data in "
+ "the NTFS extraction mode");
return WIMLIB_ERR_INVALID_PARAM;
}
#else
#endif
}
- ret = verify_swm_set(w, additional_swms, num_additional_swms);
- if (ret != 0)
+ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
+ WIMLIB_EXTRACT_FLAG_NORPFIX)) ==
+ (WIMLIB_EXTRACT_FLAG_RPFIX | WIMLIB_EXTRACT_FLAG_NORPFIX))
+ {
+ ERROR("Cannot specify RPFIX and NORPFIX flags at the same time!");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+
+ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
+ WIMLIB_EXTRACT_FLAG_NORPFIX)) == 0)
+ {
+ /* Do reparse point fixups by default if the WIM header says
+ * they are enabled and we are extracting a full image. */
+ if ((wim_header_flags & WIM_HDR_FLAG_RP_FIX) && is_entire_image)
+ extract_flags |= WIMLIB_EXTRACT_FLAG_RPFIX;
+ }
+
+ if (!is_entire_image && (extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX)) {
+ ERROR("Cannot specify --rpfix when not extracting entire image");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+
+ cmd->extract_flags = extract_flags;
+ return 0;
+}
+
+
+/* Internal function to execute extraction commands for a WIM image. */
+static int
+do_wimlib_extract_files(WIMStruct *wim,
+ int image,
+ struct wimlib_extract_command *cmds,
+ size_t num_cmds,
+ wimlib_progress_func_t progress_func)
+{
+ int ret;
+ bool found_link_cmd = false;
+ bool found_nolink_cmd = false;
+
+ /* Select the image from which we are extracting files */
+ ret = select_wim_image(wim, image);
+ if (ret)
+ return ret;
+
+ /* Make sure there are no streams in the WIM that have not been
+ * checksummed yet. */
+ ret = wim_checksum_unhashed_streams(wim);
+ if (ret)
return ret;
+ /* Check for problems with the extraction commands */
+ for (size_t i = 0; i < num_cmds; i++) {
+ ret = check_extract_command(&cmds[i], wim->hdr.flags);
+ if (ret)
+ return ret;
+ if (cmds[i].extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK)) {
+ found_link_cmd = true;
+ } else {
+ found_nolink_cmd = true;
+ }
+ if (found_link_cmd && found_nolink_cmd) {
+ ERROR("Symlink or hardlink extraction mode must "
+ "be set on all extraction commands");
+ return WIMLIB_ERR_INVALID_PARAM;
+ }
+ }
+
+ /* Execute the extraction commands */
+ for (size_t i = 0; i < num_cmds; i++) {
+ ret = extract_tree(wim,
+ cmds[i].wim_source_path,
+ cmds[i].fs_dest_path,
+ cmds[i].extract_flags,
+ progress_func);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+/* Extract files or directories from a WIM image. */
+WIMLIBAPI int
+wimlib_extract_files(WIMStruct *wim,
+ int image,
+ const struct wimlib_extract_command *cmds,
+ size_t num_cmds,
+ int default_extract_flags,
+ WIMStruct **additional_swms,
+ unsigned num_additional_swms,
+ wimlib_progress_func_t progress_func)
+{
+ int ret;
+ struct wimlib_extract_command *cmds_copy;
+ struct wim_lookup_table *wim_tab_save, *joined_tab;
+ int all_flags = 0;
+
+ default_extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
+
+ ret = verify_swm_set(wim, additional_swms, num_additional_swms);
+ if (ret)
+ goto out;
+
+ if (num_cmds == 0)
+ goto out;
+
if (num_additional_swms) {
- ret = new_joined_lookup_table(w, additional_swms,
+ ret = new_joined_lookup_table(wim, additional_swms,
+ num_additional_swms,
+ &joined_tab);
+ if (ret)
+ goto out;
+ wim_tab_save = wim->lookup_table;
+ wim->lookup_table = joined_tab;
+ }
+
+ cmds_copy = CALLOC(num_cmds, sizeof(cmds[0]));
+ if (!cmds_copy) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_restore_lookup_table;
+ }
+
+ for (size_t i = 0; i < num_cmds; i++) {
+ cmds_copy[i].extract_flags = (default_extract_flags |
+ cmds[i].extract_flags)
+ & WIMLIB_EXTRACT_MASK_PUBLIC;
+ all_flags |= cmds_copy[i].extract_flags;
+
+ cmds_copy[i].wim_source_path = canonicalize_wim_path(cmds[i].wim_source_path);
+ if (!cmds_copy[i].wim_source_path) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_free_cmds_copy;
+ }
+
+ cmds_copy[i].fs_dest_path = canonicalize_fs_path(cmds[i].fs_dest_path);
+ if (!cmds_copy[i].fs_dest_path) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_free_cmds_copy;
+ }
+
+ }
+ ret = do_wimlib_extract_files(wim, image,
+ cmds_copy, num_cmds,
+ progress_func);
+
+ if (all_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
+ WIMLIB_EXTRACT_FLAG_HARDLINK))
+ {
+ for_lookup_table_entry(wim->lookup_table,
+ lte_free_extracted_file, NULL);
+ }
+out_free_cmds_copy:
+ for (size_t i = 0; i < num_cmds; i++) {
+ FREE(cmds_copy[i].wim_source_path);
+ FREE(cmds_copy[i].fs_dest_path);
+ }
+ FREE(cmds_copy);
+out_restore_lookup_table:
+ if (num_additional_swms) {
+ free_lookup_table(wim->lookup_table);
+ wim->lookup_table = wim_tab_save;
+ }
+out:
+ return ret;
+}
+
+/*
+ * Extracts an image from a WIM file.
+ *
+ * @wim: WIMStruct for the WIM file.
+ *
+ * @image: Number of the single image to extract.
+ *
+ * @target: Directory or NTFS volume to extract the image to.
+ *
+ * @extract_flags: Bitwise or of WIMLIB_EXTRACT_FLAG_*.
+ *
+ * @progress_func: If non-NULL, a progress function to be called
+ * periodically.
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
+static int
+extract_single_image(WIMStruct *wim, int image,
+ const tchar *target, int extract_flags,
+ wimlib_progress_func_t progress_func)
+{
+ int ret;
+ tchar *target_copy = canonicalize_fs_path(target);
+ if (!target_copy)
+ return WIMLIB_ERR_NOMEM;
+ struct wimlib_extract_command cmd = {
+ .wim_source_path = T(""),
+ .fs_dest_path = target_copy,
+ .extract_flags = extract_flags,
+ };
+ ret = do_wimlib_extract_files(wim, image, &cmd, 1, progress_func);
+ FREE(target_copy);
+ return ret;
+}
+
+static const tchar * const filename_forbidden_chars =
+T(
+#ifdef __WIN32__
+"<>:\"/\\|?*"
+#else
+"/"
+#endif
+);
+
+/* This function checks if it is okay to use a WIM image's name as a directory
+ * name. */
+static bool
+image_name_ok_as_dir(const tchar *image_name)
+{
+ return image_name && *image_name &&
+ !tstrpbrk(image_name, filename_forbidden_chars) &&
+ tstrcmp(image_name, T(".")) &&
+ tstrcmp(image_name, T(".."));
+}
+
+/* Extracts all images from the WIM to the directory @target, with the images
+ * placed in subdirectories named by their image names. */
+static int
+extract_all_images(WIMStruct *wim,
+ const tchar *target,
+ int extract_flags,
+ wimlib_progress_func_t progress_func)
+{
+ size_t image_name_max_len = max(xml_get_max_image_name_len(wim), 20);
+ size_t output_path_len = tstrlen(target);
+ tchar buf[output_path_len + 1 + image_name_max_len + 1];
+ int ret;
+ int image;
+ const tchar *image_name;
+ struct stat stbuf;
+
+ if (tstat(target, &stbuf)) {
+ if (errno == ENOENT)
+ {
+ if (tmkdir(target, S_IRWXU | S_IRGRP | S_IXGRP |
+ S_IROTH | S_IXOTH))
+ {
+ ERROR_WITH_ERRNO("Failed to create directory \"%"TS"\"", target);
+ return WIMLIB_ERR_MKDIR;
+ }
+ } else {
+ ERROR_WITH_ERRNO("Failed to stat \"%"TS"\"", target);
+ return WIMLIB_ERR_STAT;
+ }
+ } else if (!S_ISDIR(stbuf.st_mode)) {
+ ERROR("\"%"TS"\" is not a directory", target);
+ return WIMLIB_ERR_NOTDIR;
+ }
+
+ tmemcpy(buf, target, output_path_len);
+ buf[output_path_len] = T('/');
+ for (image = 1; image <= wim->hdr.image_count; image++) {
+ image_name = wimlib_get_image_name(wim, image);
+ if (image_name_ok_as_dir(image_name)) {
+ tstrcpy(buf + output_path_len + 1, image_name);
+ } else {
+ /* Image name is empty or contains forbidden characters.
+ * Use image number instead. */
+ tsprintf(buf + output_path_len + 1, T("%d"), image);
+ }
+ ret = extract_single_image(wim, image, buf, extract_flags,
+ progress_func);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+/* Extracts a single image or all images from a WIM file to a directory or NTFS
+ * volume. */
+WIMLIBAPI int
+wimlib_extract_image(WIMStruct *wim,
+ int image,
+ const tchar *target,
+ int extract_flags,
+ WIMStruct **additional_swms,
+ unsigned num_additional_swms,
+ wimlib_progress_func_t progress_func)
+{
+ struct wim_lookup_table *joined_tab, *wim_tab_save;
+ int ret;
+
+ extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
+
+ ret = verify_swm_set(wim, additional_swms, num_additional_swms);
+ if (ret)
+ return ret;
+
+ if (num_additional_swms) {
+ ret = new_joined_lookup_table(wim, additional_swms,
num_additional_swms, &joined_tab);
- if (ret != 0)
+ if (ret)
return ret;
- w_tab_save = w->lookup_table;
- w->lookup_table = joined_tab;
+ wim_tab_save = wim->lookup_table;
+ wim->lookup_table = joined_tab;
}
if (image == WIMLIB_ALL_IMAGES) {
- extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
- ret = extract_all_images(w, target, extract_flags,
+ ret = extract_all_images(wim, target,
+ extract_flags | WIMLIB_EXTRACT_FLAG_MULTI_IMAGE,
progress_func);
} else {
- extract_flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
- ret = extract_single_image(w, image, target, extract_flags,
+ ret = extract_single_image(wim, image, target, extract_flags,
progress_func);
}
if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK))
{
- for_lookup_table_entry(w->lookup_table,
+ for_lookup_table_entry(wim->lookup_table,
lte_free_extracted_file,
NULL);
}
-
if (num_additional_swms) {
- free_lookup_table(w->lookup_table);
- w->lookup_table = w_tab_save;
+ free_lookup_table(wim->lookup_table);
+ wim->lookup_table = wim_tab_save;
}
return ret;
}
git://wimlib.net / wimlib / blobdiff