2 Copyright (C) 2000-2003 Kern Sibbald and John Walker
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of
7 the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public
15 License along with this program; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19 This file is based on GNU TAR source code. Except for a few key
20 ideas, it has been rewritten for Bacula.
24 Thanks to the TAR programmers.
31 extern int32_t name_max; /* filename max length */
32 extern int32_t path_max; /* path name max length */
35 * Structure for keeping track of hard linked files, we
36 * keep an entry for each hardlinked file that we save,
37 * which is the first one found. For all the other files that
38 * are linked to this one, we save only the directory
39 * entry so we can link it.
43 dev_t dev; /* device */
44 ino_t ino; /* inode with device is unique */
46 uint32_t FileIndex; /* Bacula FileIndex of this file */
47 char name[1]; /* The name */
50 static void free_dir_ff_pkt(FF_PKT *dir_ff_pkt)
52 free(dir_ff_pkt->fname);
53 free(dir_ff_pkt->link);
54 free_pool_memory(dir_ff_pkt->sys_fname);
60 * handle_file is the callback for handling the file.
62 * parent_device is the device we are currently on
63 * top_level is 1 when not recursing or 0 when
64 * decending into a directory.
67 find_one_file(JCR *jcr, FF_PKT *ff_pkt, int handle_file(FF_PKT *ff, void *hpkt),
68 void *pkt, char *fname, dev_t parent_device, int top_level)
70 struct utimbuf restore_times;
73 ff_pkt->fname = ff_pkt->link = fname;
75 if (lstat(fname, &ff_pkt->statp) != 0) {
76 /* Cannot stat file */
77 ff_pkt->type = FT_NOSTAT;
78 ff_pkt->ff_errno = errno;
79 return handle_file(ff_pkt, pkt);
82 Dmsg1(300, "File ----: %s\n", fname);
84 /* Save current times of this directory in case we need to
85 * reset them because the user doesn't want them changed.
87 restore_times.actime = ff_pkt->statp.st_atime;
88 restore_times.modtime = ff_pkt->statp.st_mtime;
92 * If this is an Incremental backup, see if file was modified
93 * since our last "save_time", presumably the last Full save
96 if (ff_pkt->incremental && !S_ISDIR(ff_pkt->statp.st_mode)) {
97 Dmsg1(300, "Non-directory incremental: %s\n", ff_pkt->fname);
99 if (ff_pkt->statp.st_mtime < ff_pkt->save_time
100 && (ff_pkt->mtime_only ||
101 ff_pkt->statp.st_ctime < ff_pkt->save_time)) {
102 /* Incremental option, file not changed */
103 ff_pkt->type = FT_NOCHG;
104 return handle_file(ff_pkt, pkt);
108 /* ***FIXME*** implement this */
110 /* See if we are trying to dump the archive. */
111 if (ar_dev && ff_pkt->statp.st_dev == ar_dev && ff_pkt->statp.st_ino == ar_ino) {
112 ff_pkt->type = FT_ISARCH;
113 return handle_file(ff_pkt, pkt);
118 * Handle hard linked files
120 * Maintain a list of hard linked files already backed up. This
121 * allows us to ensure that the data of each file gets backed
124 if (ff_pkt->statp.st_nlink > 1
125 && (S_ISREG(ff_pkt->statp.st_mode)
126 || S_ISCHR(ff_pkt->statp.st_mode)
127 || S_ISBLK(ff_pkt->statp.st_mode)
128 || S_ISFIFO(ff_pkt->statp.st_mode)
129 || S_ISSOCK(ff_pkt->statp.st_mode))) {
133 /* Search link list of hard linked files */
134 for (lp = ff_pkt->linklist; lp; lp = lp->next)
135 if (lp->ino == ff_pkt->statp.st_ino && lp->dev == ff_pkt->statp.st_dev) {
136 ff_pkt->link = lp->name;
137 ff_pkt->type = FT_LNKSAVED; /* Handle link, file already saved */
138 ff_pkt->LinkFI = lp->FileIndex;
139 return handle_file(ff_pkt, pkt);
142 /* File not previously dumped. Chain it into our list. */
143 lp = (struct f_link *)bmalloc(sizeof(struct f_link) + strlen(fname) +1);
144 lp->ino = ff_pkt->statp.st_ino;
145 lp->dev = ff_pkt->statp.st_dev;
146 strcpy(lp->name, fname);
147 lp->next = ff_pkt->linklist;
148 ff_pkt->linklist = lp;
149 ff_pkt->linked = lp; /* mark saved link */
151 ff_pkt->linked = NULL;
154 /* This is not a link to a previously dumped file, so dump it. */
155 if (S_ISREG(ff_pkt->statp.st_mode)) {
158 sizeleft = ff_pkt->statp.st_size;
160 /* Don't bother opening empty, world readable files. Also do not open
161 files when archive is meant for /dev/null. */
162 if (ff_pkt->null_output_device || (sizeleft == 0
163 && MODE_RALL == (MODE_RALL & ff_pkt->statp.st_mode))) {
164 ff_pkt->type = FT_REGE;
166 ff_pkt->type = FT_REG;
168 rtn_stat = handle_file(ff_pkt, pkt);
169 if (ff_pkt->linked) {
170 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
175 } else if (S_ISLNK(ff_pkt->statp.st_mode)) { /* soft link */
177 char *buffer = (char *)alloca(path_max + name_max + 102);
179 size = readlink(fname, buffer, path_max + name_max + 101);
181 /* Could not follow link */
182 ff_pkt->type = FT_NOFOLLOW;
183 ff_pkt->ff_errno = errno;
184 rtn_stat = handle_file(ff_pkt, pkt);
185 if (ff_pkt->linked) {
186 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
191 ff_pkt->link = buffer; /* point to link */
192 ff_pkt->type = FT_LNK; /* got a real link */
193 rtn_stat = handle_file(ff_pkt, pkt);
194 if (ff_pkt->linked) {
195 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
199 } else if (S_ISDIR(ff_pkt->statp.st_mode)) {
201 struct dirent *entry, *result;
206 dev_t our_device = ff_pkt->statp.st_dev;
209 * If we are using Win32 (non-portable) backup API, don't check
210 * access as everything is more complicated, and
211 * in principle, we should be able to access everything.
213 if (!have_win32_api() || (ff_pkt->flags & FO_PORTABLE)) {
214 if (access(fname, R_OK) == -1 && geteuid() != 0) {
215 /* Could not access() directory */
216 ff_pkt->type = FT_NOACCESS;
217 ff_pkt->ff_errno = errno;
218 rtn_stat = handle_file(ff_pkt, pkt);
219 if (ff_pkt->linked) {
220 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
226 /* Build a canonical directory name with a trailing slash in link var */
228 link_len = len + 200;
229 link = (char *)bmalloc(link_len + 2);
230 bstrncpy(link, fname, link_len);
231 /* Strip all trailing slashes */
232 while (len >= 1 && link[len - 1] == '/')
234 link[len++] = '/'; /* add back one */
238 if (ff_pkt->incremental &&
239 (ff_pkt->statp.st_mtime < ff_pkt->save_time &&
240 ff_pkt->statp.st_ctime < ff_pkt->save_time)) {
241 /* Incremental option, directory entry not changed */
242 ff_pkt->type = FT_DIRNOCHG;
244 ff_pkt->type = FT_DIR;
248 * Create a temporary ff packet for this directory
249 * entry, and defer handling the directory until
250 * we have recursed into it. This saves the
251 * directory after all files have been processed, and
252 * during the restore, the directory permissions will
253 * be reset after all the files have been restored.
255 Dmsg1(300, "Create temp ff packet for dir: %s\n", ff_pkt->fname);
256 FF_PKT *dir_ff_pkt = (FF_PKT *)bmalloc(sizeof(FF_PKT));
257 memcpy(dir_ff_pkt, ff_pkt, sizeof(FF_PKT));
258 dir_ff_pkt->fname = bstrdup(ff_pkt->fname);
259 dir_ff_pkt->link = bstrdup(ff_pkt->link);
260 dir_ff_pkt->sys_fname = get_pool_memory(PM_FNAME);
261 dir_ff_pkt->included_files_list = NULL;
262 dir_ff_pkt->excluded_files_list = NULL;
263 dir_ff_pkt->excluded_paths_list = NULL;
264 dir_ff_pkt->linklist = NULL;
266 ff_pkt->link = ff_pkt->fname; /* reset "link" */
269 * Do not decend into subdirectories (recurse) if the
270 * user has turned it off for this directory.
272 if (ff_pkt->flags & FO_NO_RECURSION) {
273 /* No recursion into this directory */
274 ff_pkt->type = FT_NORECURSE;
275 rtn_stat = handle_file(ff_pkt, pkt);
276 if (ff_pkt->linked) {
277 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
280 free_dir_ff_pkt(dir_ff_pkt);
285 * See if we are crossing file systems, and
286 * avoid doing so if the user only wants to dump one file system.
288 if (!top_level && !(ff_pkt->flags & FO_MULTIFS) &&
289 parent_device != ff_pkt->statp.st_dev) {
290 /* returning here means we do not handle this directory */
291 ff_pkt->type = FT_NOFSCHG;
292 rtn_stat = handle_file(ff_pkt, pkt);
293 if (ff_pkt->linked) {
294 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
297 free_dir_ff_pkt(dir_ff_pkt);
301 * Decend into or "recurse" into the directory to read
302 * all the files in it.
305 if ((directory = opendir(fname)) == NULL) {
306 ff_pkt->type = FT_NOOPEN;
307 ff_pkt->ff_errno = errno;
308 rtn_stat = handle_file(ff_pkt, pkt);
309 if (ff_pkt->linked) {
310 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
313 free_dir_ff_pkt(dir_ff_pkt);
318 * Process all files in this directory entry (recursing).
319 * This would possibly run faster if we chdir to the directory
320 * before traversing it.
323 entry = (struct dirent *)malloc(sizeof(struct dirent) + name_max + 100);
324 for ( ; !job_canceled(jcr); ) {
328 status = readdir_r(directory, entry, &result);
329 if (status != 0 || result == NULL) {
332 ASSERT(name_max+1 > (int)sizeof(struct dirent) + (int)NAMELEN(entry));
334 /* Skip `.', `..', and excluded file names. */
335 if (p[0] == '\0' || (p[0] == '.' && (p[1] == '\0' ||
336 (p[1] == '.' && p[2] == '\0')))) {
340 if ((int)NAMELEN(entry) + len >= link_len) {
341 link_len = len + NAMELEN(entry) + 1;
342 link = (char *)brealloc(link, link_len + 1);
345 for (i=0; i < (int)NAMELEN(entry); i++) {
349 if (!file_is_excluded(ff_pkt, link)) {
350 rtn_stat = find_one_file(jcr, ff_pkt, handle_file, pkt, link, our_device, 0);
351 if (ff_pkt->linked) {
352 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
361 * Now that we have recursed through all the files in the
362 * directory, we "save" the directory so that after all
363 * the files are restored, this entry will serve to reset
364 * the directory modes and dates. Temp directory values
365 * were used without this record.
367 handle_file(dir_ff_pkt, pkt); /* handle directory entry */
368 if (ff_pkt->linked) {
369 ff_pkt->linked->FileIndex = dir_ff_pkt->FileIndex;
371 free_dir_ff_pkt(dir_ff_pkt);
373 if (ff_pkt->atime_preserve) {
374 utime(fname, &restore_times);
377 } /* end check for directory */
380 * If it is explicitly mentioned (i.e. top_level) and is
381 * a block device, we do a raw backup of it or if it is
382 * a fifo, we simply read it.
384 #ifdef HAVE_FREEBSD_OS
386 * On FreeBSD, all block devices are character devices, so
387 * to be able to read a raw disk, we need the check for
388 * a character device.
389 * crw-r----- 1 root operator - 116, 0x00040002 Jun 9 19:32 /dev/ad0s3
390 * crw-r----- 1 root operator - 116, 0x00040002 Jun 9 19:32 /dev/rad0s3
392 if (top_level && (S_ISBLK(ff_pkt->statp.st_mode) || S_ISCHR(ff_pkt->statp.st_mode))) {
394 if (top_level && S_ISBLK(ff_pkt->statp.st_mode)) {
396 ff_pkt->type = FT_RAW; /* raw partition */
397 } else if (top_level && S_ISFIFO(ff_pkt->statp.st_mode) &&
398 ff_pkt->flags & FO_READFIFO) {
399 ff_pkt->type = FT_FIFO;
401 /* The only remaining types are special (character, ...) files */
402 ff_pkt->type = FT_SPEC;
404 rtn_stat = handle_file(ff_pkt, pkt);
405 if (ff_pkt->linked) {
406 ff_pkt->linked->FileIndex = ff_pkt->FileIndex;
411 int term_find_one(FF_PKT *ff)
413 struct f_link *lp, *lc;
416 /* Free up list of hard linked files */
417 for (lp = ff->linklist; lp;) {