Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * Utility routines used in rsync. | |
5cb37436 | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1996-2000 Andrew Tridgell |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> | |
ba2133d6 | 7 | * Copyright (C) 2003-2007 Wayne Davison |
5cb37436 | 8 | * |
0ecfbf27 | 9 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 3 of the License, or | |
12 | * (at your option) any later version. | |
5cb37436 | 13 | * |
0ecfbf27 MP |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
5cb37436 | 18 | * |
e7c67065 | 19 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 20 | * with this program; if not, visit the http://fsf.org website. |
0ecfbf27 | 21 | */ |
c627d613 | 22 | |
c627d613 | 23 | #include "rsync.h" |
1b42f628 | 24 | #include "ifuncs.h" |
c627d613 | 25 | |
c7c11a0d | 26 | extern int verbose; |
bc6ebcd2 WD |
27 | extern int dry_run; |
28 | extern int module_id; | |
29 | extern int modify_window; | |
7e43da81 | 30 | extern int relative_paths; |
e175fb07 | 31 | extern int human_readable; |
7c73536c | 32 | extern char *module_dir; |
a8167c66 | 33 | extern unsigned int module_dirlen; |
e9357a2d | 34 | extern mode_t orig_umask; |
a7260c40 | 35 | extern char *partial_dir; |
7842418b | 36 | extern struct filter_list_struct server_filter_list; |
c7c11a0d | 37 | |
0ecfbf27 MP |
38 | int sanitize_paths = 0; |
39 | ||
a8167c66 WD |
40 | char curr_dir[MAXPATHLEN]; |
41 | unsigned int curr_dir_len; | |
42 | int curr_dir_depth; /* This is only set for a sanitizing daemon. */ | |
43 | ||
0f78b815 | 44 | /* Set a fd into nonblocking mode. */ |
f0359dd0 AT |
45 | void set_nonblocking(int fd) |
46 | { | |
47 | int val; | |
48 | ||
ff530f04 | 49 | if ((val = fcntl(fd, F_GETFL)) == -1) |
f0359dd0 AT |
50 | return; |
51 | if (!(val & NONBLOCK_FLAG)) { | |
52 | val |= NONBLOCK_FLAG; | |
53 | fcntl(fd, F_SETFL, val); | |
54 | } | |
55 | } | |
56 | ||
0f78b815 | 57 | /* Set a fd into blocking mode. */ |
36349ea0 AT |
58 | void set_blocking(int fd) |
59 | { | |
60 | int val; | |
61 | ||
ff530f04 | 62 | if ((val = fcntl(fd, F_GETFL)) == -1) |
36349ea0 AT |
63 | return; |
64 | if (val & NONBLOCK_FLAG) { | |
65 | val &= ~NONBLOCK_FLAG; | |
66 | fcntl(fd, F_SETFL, val); | |
67 | } | |
68 | } | |
69 | ||
ac13ad10 | 70 | /** |
0ecfbf27 MP |
71 | * Create a file descriptor pair - like pipe() but use socketpair if |
72 | * possible (because of blocking issues on pipes). | |
5cb37436 | 73 | * |
0ecfbf27 | 74 | * Always set non-blocking. |
f0359dd0 | 75 | */ |
08f15335 AT |
76 | int fd_pair(int fd[2]) |
77 | { | |
f0359dd0 AT |
78 | int ret; |
79 | ||
4f5b0756 | 80 | #ifdef HAVE_SOCKETPAIR |
f0359dd0 | 81 | ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); |
08f15335 | 82 | #else |
f0359dd0 | 83 | ret = pipe(fd); |
08f15335 | 84 | #endif |
f0359dd0 AT |
85 | |
86 | if (ret == 0) { | |
87 | set_nonblocking(fd[0]); | |
88 | set_nonblocking(fd[1]); | |
89 | } | |
0ecfbf27 | 90 | |
f0359dd0 | 91 | return ret; |
08f15335 AT |
92 | } |
93 | ||
0b515981 | 94 | void print_child_argv(const char *prefix, char **cmd) |
5ad0e46f | 95 | { |
0b515981 | 96 | rprintf(FCLIENT, "%s ", prefix); |
5ad0e46f MP |
97 | for (; *cmd; cmd++) { |
98 | /* Look for characters that ought to be quoted. This | |
99 | * is not a great quoting algorithm, but it's | |
100 | * sufficient for a log message. */ | |
101 | if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz" | |
102 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
103 | "0123456789" | |
104 | ",.-_=+@/") != strlen(*cmd)) { | |
a3f6dbdf | 105 | rprintf(FCLIENT, "\"%s\" ", *cmd); |
5ad0e46f | 106 | } else { |
a3f6dbdf | 107 | rprintf(FCLIENT, "%s ", *cmd); |
5ad0e46f MP |
108 | } |
109 | } | |
a3f6dbdf | 110 | rprintf(FCLIENT, "\n"); |
5ad0e46f MP |
111 | } |
112 | ||
4a19c3b2 | 113 | NORETURN void out_of_memory(const char *str) |
c627d613 | 114 | { |
2cd421d8 | 115 | rprintf(FERROR, "ERROR: out of memory in %s [%s]\n", str, who_am_i()); |
c284f34a | 116 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
117 | } |
118 | ||
4a19c3b2 | 119 | NORETURN void overflow_exit(const char *str) |
575f2fca | 120 | { |
2cd421d8 | 121 | rprintf(FERROR, "ERROR: buffer overflow in %s [%s]\n", str, who_am_i()); |
c284f34a | 122 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
123 | } |
124 | ||
4a19c3b2 | 125 | int set_modtime(const char *fname, time_t modtime, mode_t mode) |
c627d613 | 126 | { |
25007999 WD |
127 | #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES |
128 | if (S_ISLNK(mode)) | |
129 | return 1; | |
130 | #endif | |
131 | ||
404e813c MP |
132 | if (verbose > 2) { |
133 | rprintf(FINFO, "set modtime of %s to (%ld) %s", | |
785abd48 | 134 | fname, (long)modtime, |
404e813c MP |
135 | asctime(localtime(&modtime))); |
136 | } | |
5cb37436 | 137 | |
15778afb WD |
138 | if (dry_run) |
139 | return 0; | |
140 | ||
31e12522 | 141 | { |
25007999 WD |
142 | #ifdef HAVE_UTIMES |
143 | struct timeval t[2]; | |
144 | t[0].tv_sec = time(NULL); | |
145 | t[0].tv_usec = 0; | |
146 | t[1].tv_sec = modtime; | |
147 | t[1].tv_usec = 0; | |
148 | # ifdef HAVE_LUTIMES | |
149a78e3 WD |
149 | if (S_ISLNK(mode)) { |
150 | lutimes(fname, t); | |
151 | return 0; /* ignore errors */ | |
152 | } | |
25007999 WD |
153 | # endif |
154 | return utimes(fname, t); | |
155 | #elif defined HAVE_UTIMBUF | |
5cb37436 | 156 | struct utimbuf tbuf; |
31e12522 AT |
157 | tbuf.actime = time(NULL); |
158 | tbuf.modtime = modtime; | |
159 | return utime(fname,&tbuf); | |
4f5b0756 | 160 | #elif defined HAVE_UTIME |
31e12522 AT |
161 | time_t t[2]; |
162 | t[0] = time(NULL); | |
163 | t[1] = modtime; | |
164 | return utime(fname,t); | |
c627d613 | 165 | #else |
25007999 | 166 | #error No file-time-modification routine found! |
c627d613 | 167 | #endif |
31e12522 | 168 | } |
c627d613 | 169 | } |
94481d91 | 170 | |
e9357a2d WD |
171 | /* This creates a new directory with default permissions. Since there |
172 | * might be some directory-default permissions affecting this, we can't | |
173 | * force the permissions directly using the original umask and mkdir(). */ | |
174 | int mkdir_defmode(char *fname) | |
175 | { | |
176 | int ret; | |
177 | ||
178 | umask(orig_umask); | |
179 | ret = do_mkdir(fname, ACCESSPERMS); | |
180 | umask(0); | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
85c41757 WD |
185 | /* Create any necessary directories in fname. Any missing directories are |
186 | * created with default permissions. */ | |
e9357a2d | 187 | int create_directory_path(char *fname) |
6574b4f7 | 188 | { |
6574b4f7 | 189 | char *p; |
85c41757 | 190 | int ret = 0; |
6574b4f7 | 191 | |
c284f34a WD |
192 | while (*fname == '/') |
193 | fname++; | |
194 | while (strncmp(fname, "./", 2) == 0) | |
195 | fname += 2; | |
6574b4f7 | 196 | |
85c41757 | 197 | umask(orig_umask); |
6574b4f7 | 198 | p = fname; |
c284f34a | 199 | while ((p = strchr(p,'/')) != NULL) { |
85c41757 WD |
200 | *p = '\0'; |
201 | if (do_mkdir(fname, ACCESSPERMS) < 0 && errno != EEXIST) | |
202 | ret = -1; | |
203 | *p++ = '/'; | |
6574b4f7 | 204 | } |
85c41757 WD |
205 | umask(0); |
206 | ||
207 | return ret; | |
6574b4f7 | 208 | } |
950ab32d | 209 | |
ac13ad10 MP |
210 | /** |
211 | * Write @p len bytes at @p ptr to descriptor @p desc, retrying if | |
212 | * interrupted. | |
213 | * | |
214 | * @retval len upon success | |
215 | * | |
216 | * @retval <0 write's (negative) error code | |
217 | * | |
218 | * Derived from GNU C's cccp.c. | |
219 | */ | |
4a19c3b2 | 220 | int full_write(int desc, const char *ptr, size_t len) |
950ab32d AT |
221 | { |
222 | int total_written; | |
5cb37436 | 223 | |
950ab32d AT |
224 | total_written = 0; |
225 | while (len > 0) { | |
5c1b7bfd | 226 | int written = write(desc, ptr, len); |
950ab32d | 227 | if (written < 0) { |
950ab32d AT |
228 | if (errno == EINTR) |
229 | continue; | |
950ab32d AT |
230 | return written; |
231 | } | |
232 | total_written += written; | |
233 | ptr += written; | |
234 | len -= written; | |
235 | } | |
236 | return total_written; | |
237 | } | |
238 | ||
ac13ad10 MP |
239 | /** |
240 | * Read @p len bytes at @p ptr from descriptor @p desc, retrying if | |
241 | * interrupted. | |
242 | * | |
243 | * @retval >0 the actual number of bytes read | |
244 | * | |
245 | * @retval 0 for EOF | |
246 | * | |
247 | * @retval <0 for an error. | |
248 | * | |
249 | * Derived from GNU C's cccp.c. */ | |
9dd891bb | 250 | static int safe_read(int desc, char *ptr, size_t len) |
950ab32d AT |
251 | { |
252 | int n_chars; | |
5cb37436 | 253 | |
9dd891bb | 254 | if (len == 0) |
950ab32d | 255 | return len; |
5cb37436 | 256 | |
950ab32d AT |
257 | do { |
258 | n_chars = read(desc, ptr, len); | |
259 | } while (n_chars < 0 && errno == EINTR); | |
5cb37436 | 260 | |
950ab32d AT |
261 | return n_chars; |
262 | } | |
263 | ||
2cce7545 WD |
264 | /* Copy a file. If ofd < 0, copy_file unlinks and opens the "dest" file. |
265 | * Otherwise, it just writes to and closes the provided file descriptor. | |
ac13ad10 | 266 | * |
3e13004b WD |
267 | * This is used in conjunction with the --temp-dir, --backup, and |
268 | * --copy-dest options. */ | |
2cce7545 WD |
269 | int copy_file(const char *source, const char *dest, int ofd, |
270 | mode_t mode, int create_bak_dir) | |
950ab32d AT |
271 | { |
272 | int ifd; | |
950ab32d AT |
273 | char buf[1024 * 8]; |
274 | int len; /* Number of bytes read into `buf'. */ | |
275 | ||
f5b532b1 | 276 | if ((ifd = do_open(source, O_RDONLY, 0)) < 0) { |
d62bcc17 | 277 | rsyserr(FERROR, errno, "open %s", full_fname(source)); |
950ab32d AT |
278 | return -1; |
279 | } | |
280 | ||
2cce7545 WD |
281 | if (ofd < 0) { |
282 | if (robust_unlink(dest) && errno != ENOENT) { | |
283 | rsyserr(FERROR, errno, "unlink %s", full_fname(dest)); | |
284 | return -1; | |
285 | } | |
950ab32d | 286 | |
2cce7545 WD |
287 | if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0 |
288 | && (!create_bak_dir || errno != ENOENT || make_bak_dir(dest) < 0 | |
289 | || (ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0)) { | |
290 | rsyserr(FERROR, errno, "open %s", full_fname(dest)); | |
291 | close(ifd); | |
292 | return -1; | |
293 | } | |
950ab32d AT |
294 | } |
295 | ||
5cb37436 | 296 | while ((len = safe_read(ifd, buf, sizeof buf)) > 0) { |
950ab32d | 297 | if (full_write(ofd, buf, len) < 0) { |
d62bcc17 | 298 | rsyserr(FERROR, errno, "write %s", full_fname(dest)); |
950ab32d AT |
299 | close(ifd); |
300 | close(ofd); | |
301 | return -1; | |
302 | } | |
303 | } | |
304 | ||
8b602edd | 305 | if (len < 0) { |
d62bcc17 | 306 | rsyserr(FERROR, errno, "read %s", full_fname(source)); |
8b602edd WD |
307 | close(ifd); |
308 | close(ofd); | |
309 | return -1; | |
310 | } | |
311 | ||
9f27cd8c | 312 | if (close(ifd) < 0) { |
d62bcc17 WD |
313 | rsyserr(FINFO, errno, "close failed on %s", |
314 | full_fname(source)); | |
9f27cd8c WD |
315 | } |
316 | ||
317 | if (close(ofd) < 0) { | |
d62bcc17 WD |
318 | rsyserr(FERROR, errno, "close failed on %s", |
319 | full_fname(dest)); | |
9f27cd8c WD |
320 | return -1; |
321 | } | |
950ab32d | 322 | |
950ab32d AT |
323 | return 0; |
324 | } | |
feaa89c4 | 325 | |
c7c11a0d DD |
326 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ |
327 | #define MAX_RENAMES_DIGITS 3 | |
328 | #define MAX_RENAMES 1000 | |
329 | ||
ac13ad10 | 330 | /** |
b4235b31 MP |
331 | * Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so |
332 | * rename to <path>/.rsyncNNN instead. | |
333 | * | |
334 | * Note that successive rsync runs will shuffle the filenames around a | |
335 | * bit as long as the file is still busy; this is because this function | |
336 | * does not know if the unlink call is due to a new file coming in, or | |
337 | * --delete trying to remove old .rsyncNNN files, hence it renames it | |
338 | * each time. | |
339 | **/ | |
63cf5ae7 | 340 | int robust_unlink(const char *fname) |
c7c11a0d DD |
341 | { |
342 | #ifndef ETXTBSY | |
343 | return do_unlink(fname); | |
344 | #else | |
345 | static int counter = 1; | |
346 | int rc, pos, start; | |
347 | char path[MAXPATHLEN]; | |
348 | ||
349 | rc = do_unlink(fname); | |
c284f34a | 350 | if (rc == 0 || errno != ETXTBSY) |
c7c11a0d DD |
351 | return rc; |
352 | ||
c284f34a WD |
353 | if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN) |
354 | pos = MAXPATHLEN - 1; | |
c7c11a0d | 355 | |
c284f34a WD |
356 | while (pos > 0 && path[pos-1] != '/') |
357 | pos--; | |
5cb37436 | 358 | pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos); |
c7c11a0d DD |
359 | |
360 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
361 | errno = ETXTBSY; | |
362 | return -1; | |
363 | } | |
364 | ||
365 | /* start where the last one left off to reduce chance of clashes */ | |
366 | start = counter; | |
367 | do { | |
434c4098 | 368 | snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter); |
c7c11a0d DD |
369 | if (++counter >= MAX_RENAMES) |
370 | counter = 1; | |
c284f34a | 371 | } while ((rc = access(path, 0)) == 0 && counter != start); |
c7c11a0d | 372 | |
4791825d | 373 | if (verbose > 0) { |
c7c11a0d | 374 | rprintf(FINFO,"renaming %s to %s because of text busy\n", |
785abd48 | 375 | fname, path); |
4791825d | 376 | } |
c7c11a0d DD |
377 | |
378 | /* maybe we should return rename()'s exit status? Nah. */ | |
379 | if (do_rename(fname, path) != 0) { | |
380 | errno = ETXTBSY; | |
381 | return -1; | |
382 | } | |
383 | return 0; | |
384 | #endif | |
385 | } | |
386 | ||
630f548f | 387 | /* Returns 0 on successful rename, 1 if we successfully copied the file |
3ed8eafc WD |
388 | * across filesystems, -2 if copy_file() failed, and -1 on other errors. |
389 | * If partialptr is not NULL and we need to do a copy, copy the file into | |
390 | * the active partial-dir instead of over the destination file. */ | |
4a19c3b2 | 391 | int robust_rename(const char *from, const char *to, const char *partialptr, |
3ed8eafc | 392 | int mode) |
c7c11a0d | 393 | { |
62c9e6b3 WD |
394 | int tries = 4; |
395 | ||
396 | while (tries--) { | |
397 | if (do_rename(from, to) == 0) | |
398 | return 0; | |
399 | ||
400 | switch (errno) { | |
401 | #ifdef ETXTBSY | |
402 | case ETXTBSY: | |
403 | if (robust_unlink(to) != 0) | |
404 | return -1; | |
405 | break; | |
c7c11a0d | 406 | #endif |
62c9e6b3 | 407 | case EXDEV: |
3ed8eafc WD |
408 | if (partialptr) { |
409 | if (!handle_partial_dir(partialptr,PDIR_CREATE)) | |
410 | return -1; | |
411 | to = partialptr; | |
412 | } | |
2cce7545 | 413 | if (copy_file(from, to, -1, mode, 0) != 0) |
62c9e6b3 WD |
414 | return -2; |
415 | do_unlink(from); | |
630f548f | 416 | return 1; |
62c9e6b3 WD |
417 | default: |
418 | return -1; | |
419 | } | |
420 | } | |
421 | return -1; | |
feaa89c4 | 422 | } |
3ba62a83 | 423 | |
3ba62a83 AT |
424 | static pid_t all_pids[10]; |
425 | static int num_pids; | |
426 | ||
4cf64834 | 427 | /** Fork and record the pid of the child. **/ |
3ba62a83 AT |
428 | pid_t do_fork(void) |
429 | { | |
430 | pid_t newpid = fork(); | |
5cb37436 | 431 | |
4cf64834 | 432 | if (newpid != 0 && newpid != -1) { |
3ba62a83 AT |
433 | all_pids[num_pids++] = newpid; |
434 | } | |
435 | return newpid; | |
436 | } | |
437 | ||
4cf64834 MP |
438 | /** |
439 | * Kill all children. | |
440 | * | |
441 | * @todo It would be kind of nice to make sure that they are actually | |
442 | * all our children before we kill them, because their pids may have | |
443 | * been recycled by some other process. Perhaps when we wait for a | |
444 | * child, we should remove it from this array. Alternatively we could | |
445 | * perhaps use process groups, but I think that would not work on | |
446 | * ancient Unix versions that don't support them. | |
447 | **/ | |
3ba62a83 AT |
448 | void kill_all(int sig) |
449 | { | |
450 | int i; | |
4cf64834 MP |
451 | |
452 | for (i = 0; i < num_pids; i++) { | |
453 | /* Let's just be a little careful where we | |
454 | * point that gun, hey? See kill(2) for the | |
455 | * magic caused by negative values. */ | |
456 | pid_t p = all_pids[i]; | |
457 | ||
458 | if (p == getpid()) | |
459 | continue; | |
460 | if (p <= 0) | |
461 | continue; | |
462 | ||
463 | kill(p, sig); | |
3ba62a83 AT |
464 | } |
465 | } | |
9486289c | 466 | |
ac13ad10 | 467 | /** Turn a user name into a uid */ |
4a19c3b2 | 468 | int name_to_uid(const char *name, uid_t *uid) |
8ef4ffd6 AT |
469 | { |
470 | struct passwd *pass; | |
b5bd5542 WD |
471 | if (!name || !*name) |
472 | return 0; | |
8ef4ffd6 AT |
473 | pass = getpwnam(name); |
474 | if (pass) { | |
475 | *uid = pass->pw_uid; | |
476 | return 1; | |
477 | } | |
478 | return 0; | |
479 | } | |
480 | ||
ac13ad10 | 481 | /** Turn a group name into a gid */ |
4a19c3b2 | 482 | int name_to_gid(const char *name, gid_t *gid) |
8ef4ffd6 AT |
483 | { |
484 | struct group *grp; | |
b5bd5542 WD |
485 | if (!name || !*name) |
486 | return 0; | |
8ef4ffd6 AT |
487 | grp = getgrnam(name); |
488 | if (grp) { | |
489 | *gid = grp->gr_gid; | |
490 | return 1; | |
491 | } | |
492 | return 0; | |
493 | } | |
494 | ||
ac13ad10 | 495 | /** Lock a byte range in a open file */ |
31593dd6 | 496 | int lock_range(int fd, int offset, int len) |
0c515f17 | 497 | { |
31593dd6 | 498 | struct flock lock; |
0c515f17 | 499 | |
31593dd6 AT |
500 | lock.l_type = F_WRLCK; |
501 | lock.l_whence = SEEK_SET; | |
502 | lock.l_start = offset; | |
503 | lock.l_len = len; | |
504 | lock.l_pid = 0; | |
5cb37436 | 505 | |
31593dd6 | 506 | return fcntl(fd,F_SETLK,&lock) == 0; |
0c515f17 | 507 | } |
874895d5 | 508 | |
7842418b | 509 | static int filter_server_path(char *arg) |
4791825d WD |
510 | { |
511 | char *s; | |
4791825d | 512 | |
7842418b | 513 | if (server_filter_list.head) { |
4791825d WD |
514 | for (s = arg; (s = strchr(s, '/')) != NULL; ) { |
515 | *s = '\0'; | |
7842418b | 516 | if (check_filter(&server_filter_list, arg, 1) < 0) { |
4791825d WD |
517 | /* We must leave arg truncated! */ |
518 | return 1; | |
519 | } | |
520 | *s++ = '/'; | |
521 | } | |
522 | } | |
523 | return 0; | |
524 | } | |
874895d5 | 525 | |
044dc293 | 526 | void glob_expand(char *s, char ***argv_ptr, int *argc_ptr, int *maxargs_ptr) |
874895d5 | 527 | { |
b7061c82 | 528 | char **argv = *argv_ptr; |
b5bd5542 | 529 | int argc = *argc_ptr; |
b7061c82 | 530 | int maxargs = *maxargs_ptr; |
4f5b0756 | 531 | #if !defined HAVE_GLOB || !defined HAVE_GLOB_H |
b7061c82 WD |
532 | if (argc == maxargs) { |
533 | maxargs += MAX_ARGS; | |
534 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
044dc293 | 535 | out_of_memory("glob_expand"); |
b7061c82 WD |
536 | *argv_ptr = argv; |
537 | *maxargs_ptr = maxargs; | |
538 | } | |
4135d091 WD |
539 | if (!*s) |
540 | s = "."; | |
b5bd5542 | 541 | s = argv[argc++] = strdup(s); |
7842418b | 542 | filter_server_path(s); |
874895d5 AT |
543 | #else |
544 | glob_t globbuf; | |
874895d5 | 545 | |
b5bd5542 WD |
546 | if (maxargs <= argc) |
547 | return; | |
4135d091 WD |
548 | if (!*s) |
549 | s = "."; | |
e42c9458 | 550 | |
4135d091 | 551 | if (sanitize_paths) |
a8167c66 | 552 | s = sanitize_path(NULL, s, "", 0, NULL); |
84a63795 WD |
553 | else |
554 | s = strdup(s); | |
044dc293 WD |
555 | if (!s) |
556 | out_of_memory("glob_expand"); | |
087bf010 | 557 | |
5cb37436 | 558 | memset(&globbuf, 0, sizeof globbuf); |
7842418b | 559 | if (!filter_server_path(s)) |
4791825d | 560 | glob(s, 0, NULL, &globbuf); |
b7061c82 WD |
561 | if (MAX((int)globbuf.gl_pathc, 1) > maxargs - argc) { |
562 | maxargs += globbuf.gl_pathc + MAX_ARGS; | |
563 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
044dc293 | 564 | out_of_memory("glob_expand"); |
b7061c82 WD |
565 | *argv_ptr = argv; |
566 | *maxargs_ptr = maxargs; | |
567 | } | |
b5bd5542 WD |
568 | if (globbuf.gl_pathc == 0) |
569 | argv[argc++] = s; | |
570 | else { | |
c8933031 | 571 | int i; |
b5bd5542 | 572 | free(s); |
c8933031 | 573 | for (i = 0; i < (int)globbuf.gl_pathc; i++) { |
b5bd5542 | 574 | if (!(argv[argc++] = strdup(globbuf.gl_pathv[i]))) |
044dc293 | 575 | out_of_memory("glob_expand"); |
b5bd5542 | 576 | } |
874895d5 AT |
577 | } |
578 | globfree(&globbuf); | |
874895d5 | 579 | #endif |
b5bd5542 | 580 | *argc_ptr = argc; |
874895d5 | 581 | } |
5a96ee05 | 582 | |
4791825d | 583 | /* This routine is only used in daemon mode. */ |
044dc293 | 584 | void glob_expand_module(char *base1, char *arg, char ***argv_ptr, int *argc_ptr, int *maxargs_ptr) |
087bf010 | 585 | { |
044dc293 | 586 | char *p, *s; |
ba5e128d | 587 | char *base = base1; |
4791825d | 588 | int base_len = strlen(base); |
087bf010 | 589 | |
044dc293 | 590 | if (!arg || !*arg) |
b5bd5542 | 591 | return; |
087bf010 | 592 | |
044dc293 WD |
593 | if (strncmp(arg, base, base_len) == 0) |
594 | arg += base_len; | |
e42c9458 | 595 | |
044dc293 WD |
596 | if (!(arg = strdup(arg))) |
597 | out_of_memory("glob_expand_module"); | |
087bf010 | 598 | |
b5bd5542 | 599 | if (asprintf(&base," %s/", base1) <= 0) |
044dc293 | 600 | out_of_memory("glob_expand_module"); |
4791825d | 601 | base_len++; |
ba5e128d | 602 | |
044dc293 WD |
603 | for (s = arg; *s; s = p + base_len) { |
604 | if ((p = strstr(s, base)) != NULL) | |
b5bd5542 | 605 | *p = '\0'; /* split it at this point */ |
044dc293 | 606 | glob_expand(s, argv_ptr, argc_ptr, maxargs_ptr); |
b5bd5542 WD |
607 | if (!p) |
608 | break; | |
087bf010 AT |
609 | } |
610 | ||
044dc293 | 611 | free(arg); |
ba5e128d | 612 | free(base); |
087bf010 | 613 | } |
5a96ee05 | 614 | |
ac13ad10 MP |
615 | /** |
616 | * Convert a string to lower case | |
617 | **/ | |
5a96ee05 AT |
618 | void strlower(char *s) |
619 | { | |
620 | while (*s) { | |
2dc7b8bd WD |
621 | if (isUpper(s)) |
622 | *s = toLower(s); | |
5a96ee05 AT |
623 | s++; |
624 | } | |
625 | } | |
e42c9458 | 626 | |
368ad70e WD |
627 | /* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If |
628 | * p1 ends with a '/', no extra '/' is inserted.) Returns the length of both | |
a8f7e4b8 WD |
629 | * strings + 1 (if '/' was inserted), regardless of whether the null-terminated |
630 | * string fits into destsize. */ | |
368ad70e WD |
631 | size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2) |
632 | { | |
633 | size_t len = strlcpy(dest, p1, destsize); | |
634 | if (len < destsize - 1) { | |
635 | if (!len || dest[len-1] != '/') | |
636 | dest[len++] = '/'; | |
637 | if (len < destsize - 1) | |
638 | len += strlcpy(dest + len, p2, destsize - len); | |
639 | else { | |
640 | dest[len] = '\0'; | |
641 | len += strlen(p2); | |
642 | } | |
643 | } | |
644 | else | |
645 | len += strlen(p2) + 1; /* Assume we'd insert a '/'. */ | |
646 | return len; | |
647 | } | |
648 | ||
649 | /* Join any number of strings together, putting them in "dest". The return | |
a8f7e4b8 WD |
650 | * value is the length of all the strings, regardless of whether the null- |
651 | * terminated whole fits in destsize. Your list of string pointers must end | |
652 | * with a NULL to indicate the end of the list. */ | |
368ad70e WD |
653 | size_t stringjoin(char *dest, size_t destsize, ...) |
654 | { | |
5cb37436 | 655 | va_list ap; |
368ad70e WD |
656 | size_t len, ret = 0; |
657 | const char *src; | |
658 | ||
659 | va_start(ap, destsize); | |
660 | while (1) { | |
661 | if (!(src = va_arg(ap, const char *))) | |
662 | break; | |
663 | len = strlen(src); | |
664 | ret += len; | |
665 | if (destsize > 1) { | |
666 | if (len >= destsize) | |
667 | len = destsize - 1; | |
668 | memcpy(dest, src, len); | |
669 | destsize -= len; | |
670 | dest += len; | |
671 | } | |
672 | } | |
673 | *dest = '\0'; | |
674 | va_end(ap); | |
675 | ||
676 | return ret; | |
677 | } | |
678 | ||
1d6b8f9a WD |
679 | int count_dir_elements(const char *p) |
680 | { | |
681 | int cnt = 0, new_component = 1; | |
682 | while (*p) { | |
683 | if (*p++ == '/') | |
a8167c66 | 684 | new_component = (*p != '.' || (p[1] != '/' && p[1] != '\0')); |
1d6b8f9a WD |
685 | else if (new_component) { |
686 | new_component = 0; | |
687 | cnt++; | |
688 | } | |
689 | } | |
690 | return cnt; | |
691 | } | |
692 | ||
6bb82fe0 WD |
693 | /* Turns multiple adjacent slashes into a single slash, drops interior "." |
694 | * elements, drops an intial "./" unless CFN_KEEP_LEADING_DOT_DIR is flagged, | |
695 | * will even drop a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is | |
696 | * flagged, removes a trailing slash (perhaps after removing the aforementioned | |
697 | * dot) unless CFN_KEEP_TRAILING_SLASH is flagged, will even collapse ".." | |
698 | * elements (except at the start of the string) if CFN_COLLAPSE_DOT_DOT_DIRS | |
699 | * is flagged. If the resulting name would be empty, we return ".". */ | |
700 | unsigned int clean_fname(char *name, int flags) | |
5243c216 | 701 | { |
e012b94f | 702 | char *limit = name - 1, *t = name, *f = name; |
ebdd24d6 | 703 | int anchored; |
5243c216 | 704 | |
b5bd5542 | 705 | if (!name) |
3104620c | 706 | return 0; |
5243c216 | 707 | |
ebdd24d6 WD |
708 | if ((anchored = *f == '/') != 0) |
709 | *t++ = *f++; | |
6bb82fe0 WD |
710 | else if (flags & CFN_KEEP_LEADING_DOT_DIR && *f == '.' && f[1] == '/') { |
711 | *t++ = *f++; | |
712 | *t++ = *f++; | |
713 | } | |
ebdd24d6 WD |
714 | while (*f) { |
715 | /* discard extra slashes */ | |
716 | if (*f == '/') { | |
717 | f++; | |
718 | continue; | |
5243c216 | 719 | } |
ebdd24d6 | 720 | if (*f == '.') { |
6bb82fe0 | 721 | /* discard interior "." dirs */ |
ebdd24d6 | 722 | if (f[1] == '/') { |
e012b94f | 723 | f += 2; |
ebdd24d6 WD |
724 | continue; |
725 | } | |
6bb82fe0 WD |
726 | if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR) |
727 | break; | |
ebdd24d6 | 728 | /* collapse ".." dirs */ |
6bb82fe0 WD |
729 | if (flags & CFN_COLLAPSE_DOT_DOT_DIRS |
730 | && f[1] == '.' && (f[2] == '/' || !f[2])) { | |
ebdd24d6 WD |
731 | char *s = t - 1; |
732 | if (s == name && anchored) { | |
733 | f += 2; | |
734 | continue; | |
735 | } | |
736 | while (s > limit && *--s != '/') {} | |
e012b94f | 737 | if (s != t - 1 && (s < name || *s == '/')) { |
ebdd24d6 WD |
738 | t = s + 1; |
739 | f += 2; | |
740 | continue; | |
741 | } | |
f55c2dfc | 742 | limit = t + 2; |
5243c216 AT |
743 | } |
744 | } | |
ebdd24d6 | 745 | while (*f && (*t++ = *f++) != '/') {} |
5243c216 | 746 | } |
ebdd24d6 | 747 | |
6bb82fe0 | 748 | if (t > name+anchored && t[-1] == '/' && !(flags & CFN_KEEP_TRAILING_SLASH)) |
ebdd24d6 WD |
749 | t--; |
750 | if (t == name) | |
751 | *t++ = '.'; | |
752 | *t = '\0'; | |
3104620c WD |
753 | |
754 | return t - name; | |
5243c216 AT |
755 | } |
756 | ||
84a63795 WD |
757 | /* Make path appear as if a chroot had occurred. This handles a leading |
758 | * "/" (either removing it or expanding it) and any leading or embedded | |
759 | * ".." components that attempt to escape past the module's top dir. | |
b4235b31 | 760 | * |
1d6b8f9a WD |
761 | * If dest is NULL, a buffer is allocated to hold the result. It is legal |
762 | * to call with the dest and the path (p) pointing to the same buffer, but | |
763 | * rootdir will be ignored to avoid expansion of the string. | |
b4235b31 | 764 | * |
1d6b8f9a | 765 | * The rootdir string contains a value to use in place of a leading slash. |
7c73536c | 766 | * Specify NULL to get the default of "module_dir". |
ac13ad10 | 767 | * |
a8167c66 WD |
768 | * The depth var is a count of how many '..'s to allow at the start of the |
769 | * path. If symlink is set, combine its value with the "p" value to get | |
770 | * the target path, and **return NULL if any '..'s try to escape**. | |
ac13ad10 | 771 | * |
b92693da | 772 | * We also clean the path in a manner similar to clean_fname() but with a |
0f78b815 | 773 | * few differences: |
b92693da WD |
774 | * |
775 | * Turns multiple adjacent slashes into a single slash, gets rid of "." dir | |
776 | * elements (INCLUDING a trailing dot dir), PRESERVES a trailing slash, and | |
777 | * ALWAYS collapses ".." elements (except for those at the start of the | |
778 | * string up to "depth" deep). If the resulting name would be empty, | |
779 | * change it into a ".". */ | |
a8167c66 WD |
780 | char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth, |
781 | const char *symlink) | |
1b8e662a | 782 | { |
a8167c66 | 783 | char *start, *sanp, *save_dest = dest; |
7e43da81 | 784 | int rlen = 0, leave_one_dotdir = relative_paths; |
84a63795 | 785 | |
a8167c66 WD |
786 | if (symlink && *symlink == '/') { |
787 | p = symlink; | |
788 | symlink = ""; | |
789 | } | |
790 | ||
84a63795 WD |
791 | if (dest != p) { |
792 | int plen = strlen(p); | |
1d6b8f9a WD |
793 | if (*p == '/') { |
794 | if (!rootdir) | |
7c73536c | 795 | rootdir = module_dir; |
1d6b8f9a WD |
796 | rlen = strlen(rootdir); |
797 | depth = 0; | |
84a63795 WD |
798 | p++; |
799 | } | |
800 | if (dest) { | |
801 | if (rlen + plen + 1 >= MAXPATHLEN) | |
802 | return NULL; | |
803 | } else if (!(dest = new_array(char, rlen + plen + 1))) | |
804 | out_of_memory("sanitize_path"); | |
805 | if (rlen) { | |
1d6b8f9a | 806 | memcpy(dest, rootdir, rlen); |
84a63795 WD |
807 | if (rlen > 1) |
808 | dest[rlen++] = '/'; | |
809 | } | |
810 | } | |
cb13abfe | 811 | |
84a63795 | 812 | start = sanp = dest + rlen; |
a8167c66 WD |
813 | while (1) { |
814 | if (*p == '\0') { | |
815 | if (!symlink || !*symlink) | |
816 | break; | |
817 | while (sanp != start && sanp[-1] != '/') { | |
818 | /* strip last element */ | |
819 | sanp--; | |
820 | } | |
821 | /* Append a relative symlink */ | |
822 | p = symlink; | |
823 | symlink = ""; | |
824 | } | |
2d41264e WD |
825 | /* discard leading or extra slashes */ |
826 | if (*p == '/') { | |
827 | p++; | |
828 | continue; | |
829 | } | |
b5f9e67d | 830 | /* this loop iterates once per filename component in p. |
44e2e578 | 831 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
832 | * always be left pointing after a slash |
833 | */ | |
c284f34a | 834 | if (*p == '.' && (p[1] == '/' || p[1] == '\0')) { |
35812ea1 | 835 | if (leave_one_dotdir && p[1]) |
7e43da81 WD |
836 | leave_one_dotdir = 0; |
837 | else { | |
838 | /* skip "." component */ | |
839 | p++; | |
840 | continue; | |
841 | } | |
cb13abfe | 842 | } |
c284f34a | 843 | if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) { |
cb13abfe | 844 | /* ".." component followed by slash or end */ |
8e5f029e | 845 | if (depth <= 0 || sanp != start) { |
a8167c66 WD |
846 | if (symlink && sanp == start) { |
847 | if (!save_dest) | |
848 | free(dest); | |
849 | return NULL; | |
850 | } | |
8e5f029e WD |
851 | p += 2; |
852 | if (sanp != start) { | |
853 | /* back up sanp one level */ | |
854 | --sanp; /* now pointing at slash */ | |
855 | while (sanp > start && sanp[-1] != '/') { | |
856 | /* skip back up to slash */ | |
857 | sanp--; | |
858 | } | |
b5f9e67d | 859 | } |
8e5f029e | 860 | continue; |
1b8e662a | 861 | } |
8e5f029e WD |
862 | /* allow depth levels of .. at the beginning */ |
863 | depth--; | |
864 | /* move the virtual beginning to leave the .. alone */ | |
865 | start = sanp + 3; | |
1b8e662a | 866 | } |
2d41264e WD |
867 | /* copy one component through next slash */ |
868 | while (*p && (*sanp++ = *p++) != '/') {} | |
1b8e662a | 869 | } |
84a63795 | 870 | if (sanp == dest) { |
b5f9e67d | 871 | /* ended up with nothing, so put in "." component */ |
44e2e578 | 872 | *sanp++ = '.'; |
b5f9e67d | 873 | } |
44e2e578 | 874 | *sanp = '\0'; |
1b8e662a | 875 | |
84a63795 | 876 | return dest; |
14b61c63 | 877 | } |
5243c216 | 878 | |
a8167c66 | 879 | /* Like chdir(), but it keeps track of the current directory (in the |
a16d8f2b | 880 | * global "curr_dir"), and ensures that the path size doesn't overflow. |
a8167c66 | 881 | * Also cleans the path using the clean_fname() function. */ |
2c708476 | 882 | int push_dir(const char *dir, int set_path_only) |
5243c216 | 883 | { |
5243c216 | 884 | static int initialised; |
4af8fe4e | 885 | unsigned int len; |
5243c216 AT |
886 | |
887 | if (!initialised) { | |
888 | initialised = 1; | |
5cb37436 | 889 | getcwd(curr_dir, sizeof curr_dir - 1); |
4af8fe4e | 890 | curr_dir_len = strlen(curr_dir); |
5243c216 AT |
891 | } |
892 | ||
4af8fe4e WD |
893 | if (!dir) /* this call was probably just to initialize */ |
894 | return 0; | |
c226b7c2 | 895 | |
4af8fe4e WD |
896 | len = strlen(dir); |
897 | if (len == 1 && *dir == '.') | |
898 | return 1; | |
5243c216 | 899 | |
7c73536c WD |
900 | if ((*dir == '/' ? len : curr_dir_len + 1 + len) >= sizeof curr_dir) { |
901 | errno = ENAMETOOLONG; | |
4af8fe4e | 902 | return 0; |
7c73536c | 903 | } |
4af8fe4e | 904 | |
ba081be3 | 905 | if (!set_path_only && chdir(dir)) |
4af8fe4e | 906 | return 0; |
5243c216 AT |
907 | |
908 | if (*dir == '/') { | |
4af8fe4e WD |
909 | memcpy(curr_dir, dir, len + 1); |
910 | curr_dir_len = len; | |
911 | } else { | |
912 | curr_dir[curr_dir_len++] = '/'; | |
913 | memcpy(curr_dir + curr_dir_len, dir, len + 1); | |
914 | curr_dir_len += len; | |
5243c216 AT |
915 | } |
916 | ||
6bb82fe0 | 917 | curr_dir_len = clean_fname(curr_dir, CFN_COLLAPSE_DOT_DOT_DIRS); |
a8167c66 WD |
918 | if (sanitize_paths) { |
919 | if (module_dirlen > curr_dir_len) | |
920 | module_dirlen = curr_dir_len; | |
921 | curr_dir_depth = count_dir_elements(curr_dir + module_dirlen); | |
922 | } | |
5243c216 | 923 | |
4af8fe4e | 924 | return 1; |
5243c216 AT |
925 | } |
926 | ||
a16d8f2b WD |
927 | /** |
928 | * Reverse a push_dir() call. You must pass in an absolute path | |
929 | * that was copied from a prior value of "curr_dir". | |
930 | **/ | |
2c708476 | 931 | int pop_dir(const char *dir) |
5243c216 | 932 | { |
4af8fe4e WD |
933 | if (chdir(dir)) |
934 | return 0; | |
5243c216 | 935 | |
4af8fe4e WD |
936 | curr_dir_len = strlcpy(curr_dir, dir, sizeof curr_dir); |
937 | if (curr_dir_len >= sizeof curr_dir) | |
938 | curr_dir_len = sizeof curr_dir - 1; | |
a8167c66 WD |
939 | if (sanitize_paths) |
940 | curr_dir_depth = count_dir_elements(curr_dir + module_dirlen); | |
5243c216 | 941 | |
4af8fe4e | 942 | return 1; |
5243c216 | 943 | } |
aa9b77a5 | 944 | |
eb61be19 WD |
945 | /** |
946 | * Return a quoted string with the full pathname of the indicated filename. | |
947 | * The string " (in MODNAME)" may also be appended. The returned pointer | |
948 | * remains valid until the next time full_fname() is called. | |
949 | **/ | |
9a5ade18 | 950 | char *full_fname(const char *fn) |
eb61be19 | 951 | { |
eb61be19 WD |
952 | static char *result = NULL; |
953 | char *m1, *m2, *m3; | |
954 | char *p1, *p2; | |
955 | ||
956 | if (result) | |
957 | free(result); | |
958 | ||
959 | if (*fn == '/') | |
960 | p1 = p2 = ""; | |
961 | else { | |
4cff5fa4 | 962 | p1 = curr_dir + module_dirlen; |
bc83274a WD |
963 | for (p2 = p1; *p2 == '/'; p2++) {} |
964 | if (*p2) | |
965 | p2 = "/"; | |
eb61be19 WD |
966 | } |
967 | if (module_id >= 0) { | |
968 | m1 = " (in "; | |
969 | m2 = lp_name(module_id); | |
970 | m3 = ")"; | |
eb61be19 WD |
971 | } else |
972 | m1 = m2 = m3 = ""; | |
973 | ||
c98ad3df WD |
974 | if (asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3) <= 0) |
975 | out_of_memory("full_fname"); | |
eb61be19 WD |
976 | |
977 | return result; | |
978 | } | |
979 | ||
a7260c40 WD |
980 | static char partial_fname[MAXPATHLEN]; |
981 | ||
982 | char *partial_dir_fname(const char *fname) | |
983 | { | |
984 | char *t = partial_fname; | |
985 | int sz = sizeof partial_fname; | |
986 | const char *fn; | |
987 | ||
988 | if ((fn = strrchr(fname, '/')) != NULL) { | |
989 | fn++; | |
990 | if (*partial_dir != '/') { | |
991 | int len = fn - fname; | |
992 | strncpy(t, fname, len); /* safe */ | |
993 | t += len; | |
994 | sz -= len; | |
995 | } | |
996 | } else | |
997 | fn = fname; | |
998 | if ((int)pathjoin(t, sz, partial_dir, fn) >= sz) | |
999 | return NULL; | |
5aa7b20a | 1000 | if (server_filter_list.head) { |
89363676 WD |
1001 | t = strrchr(partial_fname, '/'); |
1002 | *t = '\0'; | |
5aa7b20a WD |
1003 | if (check_filter(&server_filter_list, partial_fname, 1) < 0) |
1004 | return NULL; | |
89363676 | 1005 | *t = '/'; |
5aa7b20a WD |
1006 | if (check_filter(&server_filter_list, partial_fname, 0) < 0) |
1007 | return NULL; | |
1008 | } | |
a7260c40 WD |
1009 | |
1010 | return partial_fname; | |
1011 | } | |
1012 | ||
1013 | /* If no --partial-dir option was specified, we don't need to do anything | |
1014 | * (the partial-dir is essentially '.'), so just return success. */ | |
1015 | int handle_partial_dir(const char *fname, int create) | |
1016 | { | |
1017 | char *fn, *dir; | |
1018 | ||
1019 | if (fname != partial_fname) | |
1020 | return 1; | |
1021 | if (!create && *partial_dir == '/') | |
1022 | return 1; | |
1023 | if (!(fn = strrchr(partial_fname, '/'))) | |
1024 | return 1; | |
1025 | ||
1026 | *fn = '\0'; | |
1027 | dir = partial_fname; | |
1028 | if (create) { | |
1029 | STRUCT_STAT st; | |
a7260c40 | 1030 | int statret = do_lstat(dir, &st); |
a7260c40 WD |
1031 | if (statret == 0 && !S_ISDIR(st.st_mode)) { |
1032 | if (do_unlink(dir) < 0) | |
1033 | return 0; | |
1034 | statret = -1; | |
1035 | } | |
1036 | if (statret < 0 && do_mkdir(dir, 0700) < 0) | |
1037 | return 0; | |
1038 | } else | |
1039 | do_rmdir(dir); | |
1040 | *fn = '/'; | |
1041 | ||
1042 | return 1; | |
1043 | } | |
1044 | ||
ac13ad10 MP |
1045 | /** |
1046 | * Determine if a symlink points outside the current directory tree. | |
036e70b0 MP |
1047 | * This is considered "unsafe" because e.g. when mirroring somebody |
1048 | * else's machine it might allow them to establish a symlink to | |
1049 | * /etc/passwd, and then read it through a web server. | |
1050 | * | |
4e5db0ad MP |
1051 | * Null symlinks and absolute symlinks are always unsafe. |
1052 | * | |
1053 | * Basically here we are concerned with symlinks whose target contains | |
1054 | * "..", because this might cause us to walk back up out of the | |
1055 | * transferred directory. We are not allowed to go back up and | |
1056 | * reenter. | |
1057 | * | |
036e70b0 MP |
1058 | * @param dest Target of the symlink in question. |
1059 | * | |
25d34a5c | 1060 | * @param src Top source directory currently applicable. Basically this |
036e70b0 | 1061 | * is the first parameter to rsync in a simple invocation, but it's |
25d34a5c | 1062 | * modified by flist.c in slightly complex ways. |
036e70b0 MP |
1063 | * |
1064 | * @retval True if unsafe | |
1065 | * @retval False is unsafe | |
4e5db0ad MP |
1066 | * |
1067 | * @sa t_unsafe.c | |
ac13ad10 | 1068 | **/ |
7afa3a4a | 1069 | int unsafe_symlink(const char *dest, const char *src) |
4b957c22 | 1070 | { |
7afa3a4a | 1071 | const char *name, *slash; |
4b957c22 AT |
1072 | int depth = 0; |
1073 | ||
1074 | /* all absolute and null symlinks are unsafe */ | |
b5bd5542 WD |
1075 | if (!dest || !*dest || *dest == '/') |
1076 | return 1; | |
4b957c22 AT |
1077 | |
1078 | /* find out what our safety margin is */ | |
7afa3a4a WD |
1079 | for (name = src; (slash = strchr(name, '/')) != 0; name = slash+1) { |
1080 | if (strncmp(name, "../", 3) == 0) { | |
c284f34a | 1081 | depth = 0; |
7afa3a4a | 1082 | } else if (strncmp(name, "./", 2) == 0) { |
4b957c22 AT |
1083 | /* nothing */ |
1084 | } else { | |
1085 | depth++; | |
1086 | } | |
1087 | } | |
7afa3a4a WD |
1088 | if (strcmp(name, "..") == 0) |
1089 | depth = 0; | |
4b957c22 | 1090 | |
7afa3a4a WD |
1091 | for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) { |
1092 | if (strncmp(name, "../", 3) == 0) { | |
1093 | /* if at any point we go outside the current directory | |
1094 | then stop - it is unsafe */ | |
1095 | if (--depth < 0) | |
1096 | return 1; | |
1097 | } else if (strncmp(name, "./", 2) == 0) { | |
4b957c22 AT |
1098 | /* nothing */ |
1099 | } else { | |
1100 | depth++; | |
1101 | } | |
4b957c22 | 1102 | } |
7afa3a4a WD |
1103 | if (strcmp(name, "..") == 0) |
1104 | depth--; | |
4b957c22 | 1105 | |
4b957c22 AT |
1106 | return (depth < 0); |
1107 | } | |
375a4556 | 1108 | |
e175fb07 WD |
1109 | /* Return the int64 number as a string. If the --human-readable option was |
1110 | * specified, we may output the number in K, M, or G units. We can return | |
1111 | * up to 4 buffers at a time. */ | |
1112 | char *human_num(int64 num) | |
1113 | { | |
1114 | static char bufs[4][128]; /* more than enough room */ | |
1115 | static unsigned int n; | |
1116 | char *s; | |
1117 | ||
1118 | n = (n + 1) % (sizeof bufs / sizeof bufs[0]); | |
1119 | ||
1120 | if (human_readable) { | |
1121 | char units = '\0'; | |
7794db7c | 1122 | int mult = human_readable == 1 ? 1000 : 1024; |
e175fb07 WD |
1123 | double dnum = 0; |
1124 | if (num > mult*mult*mult) { | |
1125 | dnum = (double)num / (mult*mult*mult); | |
1126 | units = 'G'; | |
1127 | } else if (num > mult*mult) { | |
1128 | dnum = (double)num / (mult*mult); | |
1129 | units = 'M'; | |
1130 | } else if (num > mult) { | |
1131 | dnum = (double)num / mult; | |
1132 | units = 'K'; | |
1133 | } | |
1134 | if (units) { | |
83078af5 | 1135 | snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units); |
e175fb07 WD |
1136 | return bufs[n]; |
1137 | } | |
1138 | } | |
1139 | ||
1140 | s = bufs[n] + sizeof bufs[0] - 1; | |
1141 | *s = '\0'; | |
1142 | ||
1143 | if (!num) | |
1144 | *--s = '0'; | |
1145 | while (num) { | |
26404276 | 1146 | *--s = (char)(num % 10) + '0'; |
e175fb07 WD |
1147 | num /= 10; |
1148 | } | |
1149 | return s; | |
1150 | } | |
1151 | ||
1152 | /* Return the double number as a string. If the --human-readable option was | |
1153 | * specified, we may output the number in K, M, or G units. We use a buffer | |
1154 | * from human_num() to return our result. */ | |
1155 | char *human_dnum(double dnum, int decimal_digits) | |
1156 | { | |
1157 | char *buf = human_num(dnum); | |
1158 | int len = strlen(buf); | |
2dc7b8bd | 1159 | if (isDigit(buf + len - 1)) { |
e175fb07 WD |
1160 | /* There's extra room in buf prior to the start of the num. */ |
1161 | buf -= decimal_digits + 1; | |
1162 | snprintf(buf, len + decimal_digits + 2, "%.*f", decimal_digits, dnum); | |
1163 | } | |
1164 | return buf; | |
1165 | } | |
f7632fc6 | 1166 | |
4a19c3b2 | 1167 | /* Return the date and time as a string. Some callers tweak returned buf. */ |
f7632fc6 AT |
1168 | char *timestring(time_t t) |
1169 | { | |
1170 | static char TimeBuf[200]; | |
1171 | struct tm *tm = localtime(&t); | |
afa73c75 | 1172 | char *p; |
f7632fc6 | 1173 | |
4f5b0756 | 1174 | #ifdef HAVE_STRFTIME |
5cb37436 | 1175 | strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm); |
f7632fc6 | 1176 | #else |
5cb37436 | 1177 | strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf); |
f7632fc6 AT |
1178 | #endif |
1179 | ||
afa73c75 WD |
1180 | if ((p = strchr(TimeBuf, '\n')) != NULL) |
1181 | *p = '\0'; | |
f7632fc6 | 1182 | |
afa73c75 | 1183 | return TimeBuf; |
f7632fc6 AT |
1184 | } |
1185 | ||
e1bd49d6 MP |
1186 | /** |
1187 | * Sleep for a specified number of milliseconds. | |
1188 | * | |
1189 | * Always returns TRUE. (In the future it might return FALSE if | |
1190 | * interrupted.) | |
1191 | **/ | |
1192 | int msleep(int t) | |
9ec16c83 | 1193 | { |
c284f34a WD |
1194 | int tdiff = 0; |
1195 | struct timeval tval, t1, t2; | |
9ec16c83 AT |
1196 | |
1197 | gettimeofday(&t1, NULL); | |
5cb37436 | 1198 | |
9ec16c83 AT |
1199 | while (tdiff < t) { |
1200 | tval.tv_sec = (t-tdiff)/1000; | |
1201 | tval.tv_usec = 1000*((t-tdiff)%1000); | |
5cb37436 | 1202 | |
9ec16c83 AT |
1203 | errno = 0; |
1204 | select(0,NULL,NULL, NULL, &tval); | |
1205 | ||
1206 | gettimeofday(&t2, NULL); | |
5cb37436 | 1207 | tdiff = (t2.tv_sec - t1.tv_sec)*1000 + |
9ec16c83 AT |
1208 | (t2.tv_usec - t1.tv_usec)/1000; |
1209 | } | |
e1bd49d6 MP |
1210 | |
1211 | return True; | |
9ec16c83 AT |
1212 | } |
1213 | ||
c2b54076 WD |
1214 | /* Determine if two time_t values are equivalent (either exact, or in |
1215 | * the modification timestamp window established by --modify-window). | |
ac13ad10 MP |
1216 | * |
1217 | * @retval 0 if the times should be treated as the same | |
1218 | * | |
1219 | * @retval +1 if the first is later | |
1220 | * | |
1221 | * @retval -1 if the 2nd is later | |
1222 | **/ | |
c2b54076 | 1223 | int cmp_time(time_t file1, time_t file2) |
5b56cc19 | 1224 | { |
5b56cc19 | 1225 | if (file2 > file1) { |
bc6ebcd2 WD |
1226 | if (file2 - file1 <= modify_window) |
1227 | return 0; | |
5b56cc19 AT |
1228 | return -1; |
1229 | } | |
bc6ebcd2 WD |
1230 | if (file1 - file2 <= modify_window) |
1231 | return 0; | |
5b56cc19 AT |
1232 | return 1; |
1233 | } | |
1234 | ||
1235 | ||
1236 | #ifdef __INSURE__XX | |
0f8f98c8 AT |
1237 | #include <dlfcn.h> |
1238 | ||
ac13ad10 MP |
1239 | /** |
1240 | This routine is a trick to immediately catch errors when debugging | |
1241 | with insure. A xterm with a gdb is popped up when insure catches | |
1242 | a error. It is Linux specific. | |
1243 | **/ | |
0f8f98c8 AT |
1244 | int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6) |
1245 | { | |
1246 | static int (*fn)(); | |
1247 | int ret; | |
8950ac03 | 1248 | char *cmd; |
0f8f98c8 | 1249 | |
5cb37436 | 1250 | asprintf(&cmd, "/usr/X11R6/bin/xterm -display :0 -T Panic -n Panic -e /bin/sh -c 'cat /tmp/ierrs.*.%d ; gdb /proc/%d/exe %d'", |
0f8f98c8 AT |
1251 | getpid(), getpid(), getpid()); |
1252 | ||
1253 | if (!fn) { | |
1254 | static void *h; | |
1255 | h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY); | |
1256 | fn = dlsym(h, "_Insure_trap_error"); | |
1257 | } | |
1258 | ||
1259 | ret = fn(a1, a2, a3, a4, a5, a6); | |
1260 | ||
1261 | system(cmd); | |
1262 | ||
8950ac03 AT |
1263 | free(cmd); |
1264 | ||
0f8f98c8 AT |
1265 | return ret; |
1266 | } | |
1267 | #endif | |
58cadc86 | 1268 | |
58cadc86 WD |
1269 | #define MALLOC_MAX 0x40000000 |
1270 | ||
a2dc4d68 | 1271 | void *_new_array(unsigned long num, unsigned int size, int use_calloc) |
58cadc86 WD |
1272 | { |
1273 | if (num >= MALLOC_MAX/size) | |
1274 | return NULL; | |
a2dc4d68 | 1275 | return use_calloc ? calloc(num, size) : malloc(num * size); |
58cadc86 WD |
1276 | } |
1277 | ||
1278 | void *_realloc_array(void *ptr, unsigned int size, unsigned long num) | |
1279 | { | |
1280 | if (num >= MALLOC_MAX/size) | |
1281 | return NULL; | |
58cadc86 WD |
1282 | if (!ptr) |
1283 | return malloc(size * num); | |
1284 | return realloc(ptr, size * num); | |
1285 | } | |
e64ae6d7 WD |
1286 | |
1287 | /* Take a filename and filename length and return the most significant | |
1288 | * filename suffix we can find. This ignores suffixes such as "~", | |
1289 | * ".bak", ".orig", ".~1~", etc. */ | |
1290 | const char *find_filename_suffix(const char *fn, int fn_len, int *len_ptr) | |
1291 | { | |
1292 | const char *suf, *s; | |
1293 | BOOL had_tilde; | |
1294 | int s_len; | |
1295 | ||
1296 | /* One or more dots at the start aren't a suffix. */ | |
1297 | while (fn_len && *fn == '.') fn++, fn_len--; | |
1298 | ||
1299 | /* Ignore the ~ in a "foo~" filename. */ | |
1300 | if (fn_len > 1 && fn[fn_len-1] == '~') | |
1301 | fn_len--, had_tilde = True; | |
1302 | else | |
1303 | had_tilde = False; | |
1304 | ||
1305 | /* Assume we don't find an suffix. */ | |
1306 | suf = ""; | |
1307 | *len_ptr = 0; | |
1308 | ||
1309 | /* Find the last significant suffix. */ | |
1310 | for (s = fn + fn_len; fn_len > 1; ) { | |
1311 | while (*--s != '.' && s != fn) {} | |
1312 | if (s == fn) | |
1313 | break; | |
1314 | s_len = fn_len - (s - fn); | |
1315 | fn_len = s - fn; | |
6012eaa1 | 1316 | if (s_len == 4) { |
e64ae6d7 WD |
1317 | if (strcmp(s+1, "bak") == 0 |
1318 | || strcmp(s+1, "old") == 0) | |
1319 | continue; | |
6012eaa1 | 1320 | } else if (s_len == 5) { |
e64ae6d7 WD |
1321 | if (strcmp(s+1, "orig") == 0) |
1322 | continue; | |
1323 | } else if (s_len > 2 && had_tilde | |
2dc7b8bd | 1324 | && s[1] == '~' && isDigit(s + 2)) |
e64ae6d7 WD |
1325 | continue; |
1326 | *len_ptr = s_len; | |
1327 | suf = s; | |
1328 | if (s_len == 1) | |
1329 | break; | |
1330 | /* Determine if the suffix is all digits. */ | |
1331 | for (s++, s_len--; s_len > 0; s++, s_len--) { | |
2dc7b8bd | 1332 | if (!isDigit(s)) |
e64ae6d7 WD |
1333 | return suf; |
1334 | } | |
1335 | /* An all-digit suffix may not be that signficant. */ | |
1336 | s = suf; | |
1337 | } | |
1338 | ||
1339 | return suf; | |
1340 | } | |
1341 | ||
1342 | /* This is an implementation of the Levenshtein distance algorithm. It | |
1343 | * was implemented to avoid needing a two-dimensional matrix (to save | |
1344 | * memory). It was also tweaked to try to factor in the ASCII distance | |
1345 | * between changed characters as a minor distance quantity. The normal | |
1346 | * Levenshtein units of distance (each signifying a single change between | |
1347 | * the two strings) are defined as a "UNIT". */ | |
1348 | ||
1349 | #define UNIT (1 << 16) | |
1350 | ||
1351 | uint32 fuzzy_distance(const char *s1, int len1, const char *s2, int len2) | |
1352 | { | |
1353 | uint32 a[MAXPATHLEN], diag, above, left, diag_inc, above_inc, left_inc; | |
1354 | int32 cost; | |
1355 | int i1, i2; | |
1356 | ||
1357 | if (!len1 || !len2) { | |
1358 | if (!len1) { | |
1359 | s1 = s2; | |
1360 | len1 = len2; | |
1361 | } | |
1362 | for (i1 = 0, cost = 0; i1 < len1; i1++) | |
1363 | cost += s1[i1]; | |
1364 | return (int32)len1 * UNIT + cost; | |
1365 | } | |
1366 | ||
1367 | for (i2 = 0; i2 < len2; i2++) | |
1368 | a[i2] = (i2+1) * UNIT; | |
1369 | ||
1370 | for (i1 = 0; i1 < len1; i1++) { | |
1371 | diag = i1 * UNIT; | |
1372 | above = (i1+1) * UNIT; | |
1373 | for (i2 = 0; i2 < len2; i2++) { | |
1374 | left = a[i2]; | |
1375 | if ((cost = *((uchar*)s1+i1) - *((uchar*)s2+i2)) != 0) { | |
1376 | if (cost < 0) | |
1377 | cost = UNIT - cost; | |
1378 | else | |
1379 | cost = UNIT + cost; | |
1380 | } | |
1381 | diag_inc = diag + cost; | |
1382 | left_inc = left + UNIT + *((uchar*)s1+i1); | |
1383 | above_inc = above + UNIT + *((uchar*)s2+i2); | |
1384 | a[i2] = above = left < above | |
1385 | ? (left_inc < diag_inc ? left_inc : diag_inc) | |
1386 | : (above_inc < diag_inc ? above_inc : diag_inc); | |
1387 | diag = left; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | return a[len2-1]; | |
1392 | } | |
c2b54076 WD |
1393 | |
1394 | #define BB_SLOT_SIZE (16*1024) /* Desired size in bytes */ | |
1395 | #define BB_PER_SLOT_BITS (BB_SLOT_SIZE * 8) /* Number of bits per slot */ | |
1396 | #define BB_PER_SLOT_INTS (BB_SLOT_SIZE / 4) /* Number of int32s per slot */ | |
1397 | ||
1398 | struct bitbag { | |
1399 | uint32 **bits; | |
1400 | int slot_cnt; | |
1401 | }; | |
1402 | ||
1403 | struct bitbag *bitbag_create(int max_ndx) | |
1404 | { | |
1405 | struct bitbag *bb = new(struct bitbag); | |
1406 | bb->slot_cnt = (max_ndx + BB_PER_SLOT_BITS - 1) / BB_PER_SLOT_BITS; | |
1407 | ||
1408 | if (!(bb->bits = (uint32**)calloc(bb->slot_cnt, sizeof (uint32*)))) | |
1409 | out_of_memory("bitbag_create"); | |
1410 | ||
1411 | return bb; | |
1412 | } | |
1413 | ||
1414 | void bitbag_set_bit(struct bitbag *bb, int ndx) | |
1415 | { | |
1416 | int slot = ndx / BB_PER_SLOT_BITS; | |
1417 | ndx %= BB_PER_SLOT_BITS; | |
1418 | ||
1419 | if (!bb->bits[slot]) { | |
1420 | if (!(bb->bits[slot] = (uint32*)calloc(BB_PER_SLOT_INTS, 4))) | |
1421 | out_of_memory("bitbag_set_bit"); | |
1422 | } | |
1423 | ||
1424 | bb->bits[slot][ndx/32] |= 1u << (ndx % 32); | |
1425 | } | |
1426 | ||
1427 | #if 0 /* not needed yet */ | |
1428 | void bitbag_clear_bit(struct bitbag *bb, int ndx) | |
1429 | { | |
1430 | int slot = ndx / BB_PER_SLOT_BITS; | |
1431 | ndx %= BB_PER_SLOT_BITS; | |
1432 | ||
1433 | if (!bb->bits[slot]) | |
1434 | return; | |
1435 | ||
1436 | bb->bits[slot][ndx/32] &= ~(1u << (ndx % 32)); | |
1437 | } | |
1438 | ||
1439 | int bitbag_check_bit(struct bitbag *bb, int ndx) | |
1440 | { | |
1441 | int slot = ndx / BB_PER_SLOT_BITS; | |
1442 | ndx %= BB_PER_SLOT_BITS; | |
1443 | ||
1444 | if (!bb->bits[slot]) | |
1445 | return 0; | |
1446 | ||
1447 | return bb->bits[slot][ndx/32] & (1u << (ndx % 32)) ? 1 : 0; | |
1448 | } | |
1449 | #endif | |
1450 | ||
1451 | /* Call this with -1 to start checking from 0. Returns -1 at the end. */ | |
1452 | int bitbag_next_bit(struct bitbag *bb, int after) | |
1453 | { | |
1454 | uint32 bits, mask; | |
1455 | int i, ndx = after + 1; | |
1456 | int slot = ndx / BB_PER_SLOT_BITS; | |
1457 | ndx %= BB_PER_SLOT_BITS; | |
1458 | ||
1459 | mask = (1u << (ndx % 32)) - 1; | |
1460 | for (i = ndx / 32; slot < bb->slot_cnt; slot++, i = mask = 0) { | |
1461 | if (!bb->bits[slot]) | |
1462 | continue; | |
1463 | for ( ; i < BB_PER_SLOT_INTS; i++, mask = 0) { | |
1464 | if (!(bits = bb->bits[slot][i] & ~mask)) | |
1465 | continue; | |
1466 | /* The xor magic figures out the lowest enabled bit in | |
1467 | * bits, and the switch quickly computes log2(bit). */ | |
1468 | switch (bits ^ (bits & (bits-1))) { | |
1469 | #define LOG2(n) case 1u << n: return slot*BB_PER_SLOT_BITS + i*32 + n | |
1470 | LOG2(0); LOG2(1); LOG2(2); LOG2(3); | |
1471 | LOG2(4); LOG2(5); LOG2(6); LOG2(7); | |
1472 | LOG2(8); LOG2(9); LOG2(10); LOG2(11); | |
1473 | LOG2(12); LOG2(13); LOG2(14); LOG2(15); | |
1474 | LOG2(16); LOG2(17); LOG2(18); LOG2(19); | |
1475 | LOG2(20); LOG2(21); LOG2(22); LOG2(23); | |
1476 | LOG2(24); LOG2(25); LOG2(26); LOG2(27); | |
1477 | LOG2(28); LOG2(29); LOG2(30); LOG2(31); | |
1478 | } | |
1479 | return -1; /* impossible... */ | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | return -1; | |
1484 | } | |
1c3344a1 WD |
1485 | |
1486 | void *expand_item_list(item_list *lp, size_t item_size, | |
1487 | const char *desc, int incr) | |
1488 | { | |
1489 | /* First time through, 0 <= 0, so list is expanded. */ | |
1490 | if (lp->malloced <= lp->count) { | |
1491 | void *new_ptr; | |
1492 | size_t new_size = lp->malloced; | |
1493 | if (incr < 0) | |
0b515981 | 1494 | new_size += -incr; /* increase slowly */ |
1c3344a1 WD |
1495 | else if (new_size < (size_t)incr) |
1496 | new_size += incr; | |
1497 | else | |
1498 | new_size *= 2; | |
1499 | new_ptr = realloc_array(lp->items, char, new_size * item_size); | |
1500 | if (verbose >= 4) { | |
1501 | rprintf(FINFO, "[%s] expand %s to %.0f bytes, did%s move\n", | |
1502 | who_am_i(), desc, (double)new_size * item_size, | |
1503 | new_ptr == lp->items ? " not" : ""); | |
1504 | } | |
1505 | if (!new_ptr) | |
1506 | out_of_memory("expand_item_list"); | |
1507 | ||
1508 | lp->items = new_ptr; | |
1509 | lp->malloced = new_size; | |
1510 | } | |
1511 | return (char*)lp->items + (lp->count++ * item_size); | |
1512 | } |