2 * unix_capture.c: Capture a directory tree on UNIX.
6 * Copyright (C) 2012, 2013 Eric Biggers
8 * This file is part of wimlib, a library for working with WIM files.
10 * wimlib is free software; you can redistribute it and/or modify it under the
11 * terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 3 of the License, or (at your option)
15 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
16 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
17 * A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with wimlib; if not, see http://www.gnu.org/licenses/.
36 #include "wimlib/capture.h"
37 #include "wimlib/dentry.h"
38 #include "wimlib/error.h"
39 #include "wimlib/lookup_table.h"
40 #include "wimlib/paths.h"
41 #include "wimlib/reparse.h"
42 #include "wimlib/timestamp.h"
45 unix_capture_regular_file(const char *path,
47 struct wim_inode *inode,
48 struct list_head *unhashed_streams)
50 inode->i_attributes = FILE_ATTRIBUTE_NORMAL;
52 /* Empty files do not have to have a lookup table entry. */
54 struct wim_lookup_table_entry *lte;
57 file_on_disk = STRDUP(path);
59 return WIMLIB_ERR_NOMEM;
60 lte = new_lookup_table_entry();
63 return WIMLIB_ERR_NOMEM;
65 lte->file_on_disk = file_on_disk;
66 lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
68 add_unhashed_stream(lte, inode, 0, unhashed_streams);
75 unix_build_dentry_tree_recursive(struct wim_dentry **root_ret,
78 struct add_image_params *params);
81 unix_capture_directory(struct wim_dentry *dir_dentry,
84 struct add_image_params *params)
89 struct wim_dentry *child;
92 dir_dentry->d_inode->i_attributes = FILE_ATTRIBUTE_DIRECTORY;
95 ERROR_WITH_ERRNO("Failed to open the directory `%s'",
97 return WIMLIB_ERR_OPENDIR;
100 /* Recurse on directory contents */
104 entry = readdir(dir);
107 ret = WIMLIB_ERR_READ;
108 ERROR_WITH_ERRNO("Error reading the "
109 "directory `%s'", path);
114 if (entry->d_name[0] == '.' && (entry->d_name[1] == '\0'
115 || (entry->d_name[1] == '.' && entry->d_name[2] == '\0')))
118 size_t name_len = strlen(entry->d_name);
120 path[path_len] = '/';
121 memcpy(&path[path_len + 1], entry->d_name, name_len + 1);
122 ret = unix_build_dentry_tree_recursive(&child,
124 path_len + 1 + name_len,
129 dentry_add_child(dir_dentry, child);
131 path[path_len] = '\0';
137 unix_capture_symlink(struct wim_dentry **root_p,
139 struct wim_inode *inode,
140 struct add_image_params *params)
142 char deref_name_buf[4096];
143 ssize_t deref_name_len;
146 inode->i_attributes = FILE_ATTRIBUTE_REPARSE_POINT;
147 inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
149 /* The idea here is to call readlink() to get the UNIX target of the
150 * symbolic link, then turn the target into a reparse point data buffer
151 * that contains a relative or absolute symbolic link. */
152 deref_name_len = readlink(path, deref_name_buf,
153 sizeof(deref_name_buf) - 1);
154 if (deref_name_len >= 0) {
155 char *dest = deref_name_buf;
157 dest[deref_name_len] = '\0';
158 DEBUG("Read symlink `%s'", dest);
160 if ((params->add_flags & WIMLIB_ADD_FLAG_RPFIX) &&
163 dest = capture_fixup_absolute_symlink(dest,
164 params->capture_root_ino,
165 params->capture_root_dev);
167 /* RPFIX (reparse point fixup) mode: Ignore
168 * absolute symbolic link that points out of the
169 * tree to be captured. */
170 free_dentry(*root_p);
172 params->progress.scan.cur_path = path;
173 params->progress.scan.symlink_target = deref_name_buf;
174 do_capture_progress(params,
175 WIMLIB_SCAN_DENTRY_EXCLUDED_SYMLINK,
179 inode->i_not_rpfixed = 0;
181 ret = wim_inode_set_symlink(inode, dest, params->lookup_table);
183 /* Unfortunately, Windows seems to have the concept of
184 * "file" symbolic links as being different from
185 * "directory" symbolic links... so
186 * FILE_ATTRIBUTE_DIRECTORY needs to be set on the
187 * symbolic link if the *target* of the symbolic link is
190 if (stat(path, &stbuf) == 0 && S_ISDIR(stbuf.st_mode))
191 inode->i_attributes |= FILE_ATTRIBUTE_DIRECTORY;
194 ERROR_WITH_ERRNO("Failed to read target of "
195 "symbolic link `%s'", path);
196 ret = WIMLIB_ERR_READLINK;
202 unix_build_dentry_tree_recursive(struct wim_dentry **root_ret,
205 struct add_image_params *params)
207 struct wim_dentry *root = NULL;
209 struct wim_inode *inode = NULL;
212 if (exclude_path(path, path_len, params->config, true)) {
217 if ((params->add_flags & WIMLIB_ADD_FLAG_DEREFERENCE) ||
218 (params->add_flags & WIMLIB_ADD_FLAG_ROOT))
219 ret = stat(path, &stbuf);
221 ret = lstat(path, &stbuf);
224 ERROR_WITH_ERRNO("Failed to stat \"%s\"", path);
225 ret = WIMLIB_ERR_STAT;
229 if (!S_ISREG(stbuf.st_mode) &&
230 !S_ISDIR(stbuf.st_mode) &&
231 !S_ISLNK(stbuf.st_mode))
233 if (params->add_flags & WIMLIB_ADD_FLAG_NO_UNSUPPORTED_EXCLUDE)
235 ERROR("Can't archive unsupported file \"%s\"", path);
236 ret = WIMLIB_ERR_UNSUPPORTED_FILE;
239 params->progress.scan.cur_path = path;
240 do_capture_progress(params, WIMLIB_SCAN_DENTRY_UNSUPPORTED, NULL);
245 ret = inode_table_new_dentry(params->inode_table,
246 path_basename_with_len(path, path_len),
247 stbuf.st_ino, stbuf.st_dev,
248 S_ISDIR(stbuf.st_mode), &root);
252 inode = root->d_inode;
254 if (inode->i_nlink > 1) {
255 /* Already captured this inode? */
260 #ifdef HAVE_STAT_NANOSECOND_PRECISION
261 inode->i_creation_time = timespec_to_wim_timestamp(stbuf.st_mtim);
262 inode->i_last_write_time = timespec_to_wim_timestamp(stbuf.st_mtim);
263 inode->i_last_access_time = timespec_to_wim_timestamp(stbuf.st_atim);
265 inode->i_creation_time = unix_timestamp_to_wim(stbuf.st_mtime);
266 inode->i_last_write_time = unix_timestamp_to_wim(stbuf.st_mtime);
267 inode->i_last_access_time = unix_timestamp_to_wim(stbuf.st_atime);
269 inode->i_resolved = 1;
270 if (params->add_flags & WIMLIB_ADD_FLAG_UNIX_DATA) {
271 ret = inode_set_unix_data(inode, stbuf.st_uid,
274 params->lookup_table,
275 UNIX_DATA_ALL | UNIX_DATA_CREATE);
279 params->add_flags &= ~WIMLIB_ADD_FLAG_ROOT;
280 if (S_ISREG(stbuf.st_mode))
281 ret = unix_capture_regular_file(path, stbuf.st_size,
282 inode, params->unhashed_streams);
283 else if (S_ISDIR(stbuf.st_mode))
284 ret = unix_capture_directory(root, path, path_len, params);
286 ret = unix_capture_symlink(&root, path, inode, params);
295 params->progress.scan.cur_path = path;
297 do_capture_progress(params, WIMLIB_SCAN_DENTRY_EXCLUDED, NULL);
299 do_capture_progress(params, WIMLIB_SCAN_DENTRY_OK, inode);
302 free_dentry_tree(root, params->lookup_table);
309 * unix_build_dentry_tree():
310 * Builds a tree of WIM dentries from an on-disk directory tree (UNIX
311 * version; no NTFS-specific data is captured).
313 * @root_ret: Place to return a pointer to the root of the dentry tree. Only
314 * modified if successful. Set to NULL if the file or directory was
315 * excluded from capture.
317 * @root_disk_path: The path to the root of the directory tree on disk.
319 * @params: See doc for `struct add_image_params'.
321 * @return: 0 on success, nonzero on failure. It is a failure if any of
322 * the files cannot be `stat'ed, or if any of the needed
323 * directories cannot be opened or read. Failure to add the files
324 * to the WIM may still occur later when trying to actually read
325 * the on-disk files during a call to wimlib_write() or
326 * wimlib_overwrite().
329 unix_build_dentry_tree(struct wim_dentry **root_ret,
330 const char *root_disk_path,
331 struct add_image_params *params)
339 struct stat root_stbuf;
340 if (stat(root_disk_path, &root_stbuf)) {
341 ERROR_WITH_ERRNO("Failed to stat \"%s\"", root_disk_path);
342 return WIMLIB_ERR_STAT;
345 params->capture_root_ino = root_stbuf.st_ino;
346 params->capture_root_dev = root_stbuf.st_dev;
349 path_bufsz = min(32790, PATH_MAX + 1);
350 path_len = strlen(root_disk_path);
352 if (path_len >= path_bufsz)
353 return WIMLIB_ERR_INVALID_PARAM;
355 path_buf = MALLOC(path_bufsz);
357 return WIMLIB_ERR_NOMEM;
358 memcpy(path_buf, root_disk_path, path_len + 1);
360 ret = unix_build_dentry_tree_recursive(root_ret, path_buf,
366 #endif /* !__WIN32__ */