Commit | Line | Data |
---|---|---|
c627d613 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | /* | |
21 | Utilities used in rsync | |
22 | ||
23 | tridge, June 1996 | |
24 | */ | |
25 | #include "rsync.h" | |
26 | ||
c7c11a0d DD |
27 | extern int verbose; |
28 | ||
f0359dd0 AT |
29 | |
30 | /**************************************************************************** | |
36349ea0 | 31 | Set a fd into nonblocking mode |
f0359dd0 AT |
32 | ****************************************************************************/ |
33 | void set_nonblocking(int fd) | |
34 | { | |
35 | int val; | |
36 | ||
37 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
38 | return; | |
39 | if (!(val & NONBLOCK_FLAG)) { | |
40 | val |= NONBLOCK_FLAG; | |
41 | fcntl(fd, F_SETFL, val); | |
42 | } | |
43 | } | |
44 | ||
36349ea0 AT |
45 | /**************************************************************************** |
46 | Set a fd into blocking mode | |
47 | ****************************************************************************/ | |
48 | void set_blocking(int fd) | |
49 | { | |
50 | int val; | |
51 | ||
52 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
53 | return; | |
54 | if (val & NONBLOCK_FLAG) { | |
55 | val &= ~NONBLOCK_FLAG; | |
56 | fcntl(fd, F_SETFL, val); | |
57 | } | |
58 | } | |
59 | ||
f0359dd0 AT |
60 | |
61 | /* create a file descriptor pair - like pipe() but use socketpair if | |
62 | possible (because of blocking issues on pipes) | |
63 | ||
64 | always set non-blocking | |
65 | */ | |
08f15335 AT |
66 | int fd_pair(int fd[2]) |
67 | { | |
f0359dd0 AT |
68 | int ret; |
69 | ||
08f15335 | 70 | #if HAVE_SOCKETPAIR |
f0359dd0 | 71 | ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); |
08f15335 | 72 | #else |
f0359dd0 | 73 | ret = pipe(fd); |
08f15335 | 74 | #endif |
f0359dd0 AT |
75 | |
76 | if (ret == 0) { | |
77 | set_nonblocking(fd[0]); | |
78 | set_nonblocking(fd[1]); | |
79 | } | |
80 | ||
81 | return ret; | |
08f15335 AT |
82 | } |
83 | ||
84 | ||
36349ea0 | 85 | /* this is derived from CVS code */ |
c627d613 AT |
86 | int piped_child(char **command,int *f_in,int *f_out) |
87 | { | |
88 | int pid; | |
89 | int to_child_pipe[2]; | |
90 | int from_child_pipe[2]; | |
91 | ||
08f15335 AT |
92 | if (fd_pair(to_child_pipe) < 0 || |
93 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 94 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 95 | exit_cleanup(RERR_IPC); |
c627d613 AT |
96 | } |
97 | ||
98 | ||
3ba62a83 | 99 | pid = do_fork(); |
c627d613 | 100 | if (pid < 0) { |
9486289c | 101 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 102 | exit_cleanup(RERR_IPC); |
c627d613 AT |
103 | } |
104 | ||
105 | if (pid == 0) | |
106 | { | |
6574b4f7 | 107 | extern int orig_umask; |
c627d613 AT |
108 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || |
109 | close(to_child_pipe[1]) < 0 || | |
110 | close(from_child_pipe[0]) < 0 || | |
111 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 112 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 113 | exit_cleanup(RERR_IPC); |
c627d613 | 114 | } |
773f2bd4 AT |
115 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); |
116 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
6574b4f7 | 117 | umask(orig_umask); |
36349ea0 | 118 | set_blocking(STDIN_FILENO); |
c627d613 | 119 | execvp(command[0], command); |
9486289c | 120 | rprintf(FERROR,"Failed to exec %s : %s\n", |
c627d613 | 121 | command[0],strerror(errno)); |
65417579 | 122 | exit_cleanup(RERR_IPC); |
c627d613 AT |
123 | } |
124 | ||
125 | if (close(from_child_pipe[1]) < 0 || | |
126 | close(to_child_pipe[0]) < 0) { | |
9486289c | 127 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 128 | exit_cleanup(RERR_IPC); |
c627d613 AT |
129 | } |
130 | ||
131 | *f_in = from_child_pipe[0]; | |
132 | *f_out = to_child_pipe[1]; | |
3eb38818 | 133 | |
c627d613 AT |
134 | return pid; |
135 | } | |
136 | ||
366345fe AT |
137 | int local_child(int argc, char **argv,int *f_in,int *f_out) |
138 | { | |
139 | int pid; | |
140 | int to_child_pipe[2]; | |
141 | int from_child_pipe[2]; | |
142 | ||
08f15335 AT |
143 | if (fd_pair(to_child_pipe) < 0 || |
144 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 145 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 146 | exit_cleanup(RERR_IPC); |
366345fe AT |
147 | } |
148 | ||
149 | ||
150 | pid = do_fork(); | |
151 | if (pid < 0) { | |
9486289c | 152 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 153 | exit_cleanup(RERR_IPC); |
366345fe AT |
154 | } |
155 | ||
156 | if (pid == 0) { | |
157 | extern int am_sender; | |
158 | extern int am_server; | |
159 | ||
160 | am_sender = !am_sender; | |
161 | am_server = 1; | |
162 | ||
163 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
164 | close(to_child_pipe[1]) < 0 || | |
165 | close(from_child_pipe[0]) < 0 || | |
166 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 167 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 168 | exit_cleanup(RERR_IPC); |
366345fe AT |
169 | } |
170 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); | |
171 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
9486289c | 172 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
366345fe AT |
173 | } |
174 | ||
175 | if (close(from_child_pipe[1]) < 0 || | |
176 | close(to_child_pipe[0]) < 0) { | |
9486289c | 177 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 178 | exit_cleanup(RERR_IPC); |
366345fe AT |
179 | } |
180 | ||
181 | *f_in = from_child_pipe[0]; | |
182 | *f_out = to_child_pipe[1]; | |
183 | ||
184 | return pid; | |
185 | } | |
186 | ||
187 | ||
c627d613 AT |
188 | |
189 | void out_of_memory(char *str) | |
190 | { | |
9486289c | 191 | rprintf(FERROR,"ERROR: out of memory in %s\n",str); |
65417579 | 192 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
193 | } |
194 | ||
195 | void overflow(char *str) | |
196 | { | |
9486289c | 197 | rprintf(FERROR,"ERROR: buffer overflow in %s\n",str); |
65417579 | 198 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
199 | } |
200 | ||
201 | ||
c627d613 AT |
202 | |
203 | int set_modtime(char *fname,time_t modtime) | |
204 | { | |
31e12522 AT |
205 | extern int dry_run; |
206 | if (dry_run) return 0; | |
207 | { | |
1e9f155a | 208 | #ifdef HAVE_UTIMBUF |
31e12522 AT |
209 | struct utimbuf tbuf; |
210 | tbuf.actime = time(NULL); | |
211 | tbuf.modtime = modtime; | |
212 | return utime(fname,&tbuf); | |
c627d613 | 213 | #elif defined(HAVE_UTIME) |
31e12522 AT |
214 | time_t t[2]; |
215 | t[0] = time(NULL); | |
216 | t[1] = modtime; | |
217 | return utime(fname,t); | |
c627d613 | 218 | #else |
31e12522 AT |
219 | struct timeval t[2]; |
220 | t[0].tv_sec = time(NULL); | |
221 | t[0].tv_usec = 0; | |
222 | t[1].tv_sec = modtime; | |
223 | t[1].tv_usec = 0; | |
224 | return utimes(fname,t); | |
c627d613 | 225 | #endif |
31e12522 | 226 | } |
c627d613 | 227 | } |
94481d91 | 228 | |
720b47f2 | 229 | |
6574b4f7 AT |
230 | /**************************************************************************** |
231 | create any necessary directories in fname. Unfortunately we don't know | |
232 | what perms to give the directory when this is called so we need to rely | |
233 | on the umask | |
234 | ****************************************************************************/ | |
235 | int create_directory_path(char *fname) | |
236 | { | |
237 | extern int orig_umask; | |
238 | char *p; | |
239 | ||
240 | while (*fname == '/') fname++; | |
241 | while (strncmp(fname,"./",2)==0) fname += 2; | |
242 | ||
243 | p = fname; | |
244 | while ((p=strchr(p,'/'))) { | |
245 | *p = 0; | |
1b2d733a | 246 | do_mkdir(fname,0777 & ~orig_umask); |
6574b4f7 AT |
247 | *p = '/'; |
248 | p++; | |
249 | } | |
250 | return 0; | |
251 | } | |
950ab32d AT |
252 | |
253 | ||
254 | /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted. | |
255 | Return LEN upon success, write's (negative) error code otherwise. | |
256 | ||
257 | derived from GNU C's cccp.c. | |
258 | */ | |
a5343e76 | 259 | static int full_write(int desc, char *ptr, int len) |
950ab32d AT |
260 | { |
261 | int total_written; | |
262 | ||
263 | total_written = 0; | |
264 | while (len > 0) { | |
265 | int written = write (desc, ptr, len); | |
266 | if (written < 0) { | |
267 | #ifdef EINTR | |
268 | if (errno == EINTR) | |
269 | continue; | |
270 | #endif | |
271 | return written; | |
272 | } | |
273 | total_written += written; | |
274 | ptr += written; | |
275 | len -= written; | |
276 | } | |
277 | return total_written; | |
278 | } | |
279 | ||
280 | /* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. | |
281 | Return the actual number of bytes read, zero for EOF, or negative | |
282 | for an error. | |
283 | ||
284 | derived from GNU C's cccp.c. */ | |
6e4fb64e | 285 | static int safe_read(int desc, char *ptr, int len) |
950ab32d AT |
286 | { |
287 | int n_chars; | |
288 | ||
289 | if (len <= 0) | |
290 | return len; | |
291 | ||
292 | #ifdef EINTR | |
293 | do { | |
294 | n_chars = read(desc, ptr, len); | |
295 | } while (n_chars < 0 && errno == EINTR); | |
296 | #else | |
297 | n_chars = read(desc, ptr, len); | |
298 | #endif | |
299 | ||
300 | return n_chars; | |
301 | } | |
302 | ||
303 | ||
304 | /* copy a file - this is used in conjunction with the --temp-dir option */ | |
305 | int copy_file(char *source, char *dest, mode_t mode) | |
306 | { | |
307 | int ifd; | |
308 | int ofd; | |
309 | char buf[1024 * 8]; | |
310 | int len; /* Number of bytes read into `buf'. */ | |
311 | ||
8c9fd200 | 312 | ifd = do_open(source, O_RDONLY, 0); |
950ab32d | 313 | if (ifd == -1) { |
9486289c | 314 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
315 | source,strerror(errno)); |
316 | return -1; | |
317 | } | |
318 | ||
c7c11a0d | 319 | if (robust_unlink(dest) && errno != ENOENT) { |
9486289c | 320 | rprintf(FERROR,"unlink %s: %s\n", |
950ab32d AT |
321 | dest,strerror(errno)); |
322 | return -1; | |
323 | } | |
324 | ||
31e12522 | 325 | ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode); |
c46ded46 | 326 | if (ofd == -1) { |
9486289c | 327 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
328 | dest,strerror(errno)); |
329 | close(ifd); | |
330 | return -1; | |
331 | } | |
332 | ||
333 | while ((len = safe_read(ifd, buf, sizeof(buf))) > 0) { | |
334 | if (full_write(ofd, buf, len) < 0) { | |
9486289c | 335 | rprintf(FERROR,"write %s: %s\n", |
950ab32d AT |
336 | dest,strerror(errno)); |
337 | close(ifd); | |
338 | close(ofd); | |
339 | return -1; | |
340 | } | |
341 | } | |
342 | ||
343 | close(ifd); | |
344 | close(ofd); | |
345 | ||
346 | if (len < 0) { | |
9486289c | 347 | rprintf(FERROR,"read %s: %s\n", |
950ab32d AT |
348 | source,strerror(errno)); |
349 | return -1; | |
350 | } | |
351 | ||
352 | return 0; | |
353 | } | |
feaa89c4 | 354 | |
c7c11a0d DD |
355 | /* |
356 | Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so | |
357 | rename to <path>/.rsyncNNN instead. Note that successive rsync runs | |
358 | will shuffle the filenames around a bit as long as the file is still | |
359 | busy; this is because this function does not know if the unlink call | |
360 | is due to a new file coming in, or --delete trying to remove old | |
361 | .rsyncNNN files, hence it renames it each time. | |
362 | */ | |
363 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ | |
364 | #define MAX_RENAMES_DIGITS 3 | |
365 | #define MAX_RENAMES 1000 | |
366 | ||
367 | int robust_unlink(char *fname) | |
368 | { | |
369 | #ifndef ETXTBSY | |
370 | return do_unlink(fname); | |
371 | #else | |
372 | static int counter = 1; | |
373 | int rc, pos, start; | |
374 | char path[MAXPATHLEN]; | |
375 | ||
376 | rc = do_unlink(fname); | |
377 | if ((rc == 0) || (errno != ETXTBSY)) | |
378 | return rc; | |
379 | ||
380 | strlcpy(path, fname, MAXPATHLEN); | |
381 | ||
382 | pos = strlen(path); | |
383 | while((path[--pos] != '/') && (pos >= 0)) | |
384 | ; | |
385 | ++pos; | |
386 | strlcpy(&path[pos], ".rsync", MAXPATHLEN-pos); | |
387 | pos += sizeof(".rsync")-1; | |
388 | ||
389 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
390 | errno = ETXTBSY; | |
391 | return -1; | |
392 | } | |
393 | ||
394 | /* start where the last one left off to reduce chance of clashes */ | |
395 | start = counter; | |
396 | do { | |
397 | sprintf(&path[pos], "%03d", counter); | |
398 | if (++counter >= MAX_RENAMES) | |
399 | counter = 1; | |
400 | } while (((rc = access(path, 0)) == 0) && (counter != start)); | |
401 | ||
402 | if (verbose > 0) | |
403 | rprintf(FINFO,"renaming %s to %s because of text busy\n", | |
404 | fname, path); | |
405 | ||
406 | /* maybe we should return rename()'s exit status? Nah. */ | |
407 | if (do_rename(fname, path) != 0) { | |
408 | errno = ETXTBSY; | |
409 | return -1; | |
410 | } | |
411 | return 0; | |
412 | #endif | |
413 | } | |
414 | ||
415 | int robust_rename(char *from, char *to) | |
416 | { | |
417 | #ifndef ETXTBSY | |
418 | return do_rename(from, to); | |
419 | #else | |
420 | int rc = do_rename(from, to); | |
421 | if ((rc == 0) || (errno != ETXTBSY)) | |
422 | return rc; | |
423 | if (robust_unlink(to) != 0) | |
424 | return -1; | |
425 | return do_rename(from, to); | |
426 | #endif | |
feaa89c4 | 427 | } |
3ba62a83 AT |
428 | |
429 | ||
430 | static pid_t all_pids[10]; | |
431 | static int num_pids; | |
432 | ||
433 | /* fork and record the pid of the child */ | |
434 | pid_t do_fork(void) | |
435 | { | |
436 | pid_t newpid = fork(); | |
437 | ||
438 | if (newpid) { | |
439 | all_pids[num_pids++] = newpid; | |
440 | } | |
441 | return newpid; | |
442 | } | |
443 | ||
444 | /* kill all children */ | |
445 | void kill_all(int sig) | |
446 | { | |
447 | int i; | |
448 | for (i=0;i<num_pids;i++) { | |
449 | if (all_pids[i] != getpid()) | |
450 | kill(all_pids[i], sig); | |
451 | } | |
452 | } | |
9486289c | 453 | |
8ef4ffd6 AT |
454 | /* turn a user name into a uid */ |
455 | int name_to_uid(char *name, uid_t *uid) | |
456 | { | |
457 | struct passwd *pass; | |
458 | if (!name || !*name) return 0; | |
459 | pass = getpwnam(name); | |
460 | if (pass) { | |
461 | *uid = pass->pw_uid; | |
462 | return 1; | |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
467 | /* turn a group name into a gid */ | |
468 | int name_to_gid(char *name, gid_t *gid) | |
469 | { | |
470 | struct group *grp; | |
471 | if (!name || !*name) return 0; | |
472 | grp = getgrnam(name); | |
473 | if (grp) { | |
474 | *gid = grp->gr_gid; | |
475 | return 1; | |
476 | } | |
477 | return 0; | |
478 | } | |
479 | ||
ff8b29b8 | 480 | |
31593dd6 AT |
481 | /* lock a byte range in a open file */ |
482 | int lock_range(int fd, int offset, int len) | |
0c515f17 | 483 | { |
31593dd6 | 484 | struct flock lock; |
0c515f17 | 485 | |
31593dd6 AT |
486 | lock.l_type = F_WRLCK; |
487 | lock.l_whence = SEEK_SET; | |
488 | lock.l_start = offset; | |
489 | lock.l_len = len; | |
490 | lock.l_pid = 0; | |
491 | ||
492 | return fcntl(fd,F_SETLK,&lock) == 0; | |
0c515f17 | 493 | } |
874895d5 AT |
494 | |
495 | ||
cb13abfe | 496 | static void glob_expand_one(char *s, char **argv, int *argc, int maxargs) |
874895d5 | 497 | { |
932be9aa | 498 | #if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H)) |
e42c9458 | 499 | if (!*s) s = "."; |
087bf010 | 500 | argv[*argc] = strdup(s); |
874895d5 AT |
501 | (*argc)++; |
502 | return; | |
503 | #else | |
cb13abfe | 504 | extern int sanitize_paths; |
874895d5 AT |
505 | glob_t globbuf; |
506 | int i; | |
507 | ||
e42c9458 AT |
508 | if (!*s) s = "."; |
509 | ||
cb13abfe DD |
510 | argv[*argc] = strdup(s); |
511 | if (sanitize_paths) { | |
512 | sanitize_path(argv[*argc], NULL); | |
513 | } | |
087bf010 | 514 | |
874895d5 AT |
515 | memset(&globbuf, 0, sizeof(globbuf)); |
516 | glob(argv[*argc], 0, NULL, &globbuf); | |
517 | if (globbuf.gl_pathc == 0) { | |
518 | (*argc)++; | |
519 | globfree(&globbuf); | |
520 | return; | |
521 | } | |
522 | for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) { | |
523 | if (i == 0) free(argv[*argc]); | |
524 | argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]); | |
525 | if (!argv[(*argc) + i]) out_of_memory("glob_expand"); | |
526 | } | |
527 | globfree(&globbuf); | |
528 | (*argc) += i; | |
529 | #endif | |
530 | } | |
5a96ee05 | 531 | |
cb13abfe | 532 | void glob_expand(char *base1, char **argv, int *argc, int maxargs) |
087bf010 AT |
533 | { |
534 | char *s = argv[*argc]; | |
535 | char *p, *q; | |
ba5e128d | 536 | char *base = base1; |
087bf010 AT |
537 | |
538 | if (!s || !*s) return; | |
539 | ||
e42c9458 AT |
540 | if (strncmp(s, base, strlen(base)) == 0) { |
541 | s += strlen(base); | |
542 | } | |
543 | ||
087bf010 AT |
544 | s = strdup(s); |
545 | if (!s) out_of_memory("glob_expand"); | |
546 | ||
ba5e128d AT |
547 | base = (char *)malloc(strlen(base1)+3); |
548 | if (!base) out_of_memory("glob_expand"); | |
549 | ||
550 | sprintf(base," %s/", base1); | |
551 | ||
087bf010 AT |
552 | q = s; |
553 | while ((p = strstr(q,base)) && ((*argc) < maxargs)) { | |
ba5e128d AT |
554 | /* split it at this point */ |
555 | *p = 0; | |
cb13abfe | 556 | glob_expand_one(q, argv, argc, maxargs); |
ba5e128d | 557 | q = p+strlen(base); |
087bf010 AT |
558 | } |
559 | ||
cb13abfe | 560 | if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs); |
087bf010 AT |
561 | |
562 | free(s); | |
ba5e128d | 563 | free(base); |
087bf010 | 564 | } |
5a96ee05 AT |
565 | |
566 | /******************************************************************* | |
567 | convert a string to lower case | |
568 | ********************************************************************/ | |
569 | void strlower(char *s) | |
570 | { | |
571 | while (*s) { | |
572 | if (isupper(*s)) *s = tolower(*s); | |
573 | s++; | |
574 | } | |
575 | } | |
e42c9458 | 576 | |
37f9805d AT |
577 | /* this is like vsnprintf but it always null terminates, so you |
578 | can fit at most n-1 chars in */ | |
e42c9458 AT |
579 | int vslprintf(char *str, int n, const char *format, va_list ap) |
580 | { | |
e42c9458 | 581 | int ret = vsnprintf(str, n, format, ap); |
37f9805d AT |
582 | if (ret >= n || ret < 0) { |
583 | str[n-1] = 0; | |
e42c9458 AT |
584 | return -1; |
585 | } | |
586 | str[ret] = 0; | |
587 | return ret; | |
e42c9458 AT |
588 | } |
589 | ||
590 | ||
591 | /* like snprintf but always null terminates */ | |
592 | int slprintf(char *str, int n, char *format, ...) | |
593 | { | |
594 | va_list ap; | |
595 | int ret; | |
596 | ||
597 | va_start(ap, format); | |
598 | ret = vslprintf(str,n,format,ap); | |
599 | va_end(ap); | |
600 | return ret; | |
601 | } | |
8d9dc9f9 | 602 | |
fe8c0a98 AT |
603 | |
604 | void *Realloc(void *p, int size) | |
605 | { | |
606 | if (!p) return (void *)malloc(size); | |
607 | return (void *)realloc(p, size); | |
608 | } | |
5243c216 AT |
609 | |
610 | ||
611 | void clean_fname(char *name) | |
612 | { | |
613 | char *p; | |
614 | int l; | |
615 | int modified = 1; | |
616 | ||
617 | if (!name) return; | |
618 | ||
619 | while (modified) { | |
620 | modified = 0; | |
621 | ||
622 | if ((p=strstr(name,"/./"))) { | |
623 | modified = 1; | |
624 | while (*p) { | |
625 | p[0] = p[2]; | |
626 | p++; | |
627 | } | |
628 | } | |
629 | ||
630 | if ((p=strstr(name,"//"))) { | |
631 | modified = 1; | |
632 | while (*p) { | |
633 | p[0] = p[1]; | |
634 | p++; | |
635 | } | |
636 | } | |
637 | ||
638 | if (strncmp(p=name,"./",2) == 0) { | |
639 | modified = 1; | |
640 | do { | |
641 | p[0] = p[2]; | |
642 | } while (*p++); | |
643 | } | |
644 | ||
645 | l = strlen(p=name); | |
646 | if (l > 1 && p[l-1] == '/') { | |
647 | modified = 1; | |
648 | p[l-1] = 0; | |
649 | } | |
650 | } | |
651 | } | |
652 | ||
1b8e662a DD |
653 | /* |
654 | * Make path appear as if a chroot had occurred: | |
1b8e662a | 655 | * 1. remove leading "/" (or replace with "." if at end) |
cb13abfe | 656 | * 2. remove leading ".." components (except those allowed by "reldir") |
1b8e662a | 657 | * 3. delete any other "<dir>/.." (recursively) |
79452d46 | 658 | * Can only shrink paths, so sanitizes in place. |
b5f9e67d DD |
659 | * While we're at it, remove double slashes and "." components like |
660 | * clean_fname does(), but DON'T remove a trailing slash because that | |
661 | * is sometimes significant on command line arguments. | |
79452d46 DD |
662 | * If "reldir" is non-null, it is a sanitized directory that the path will be |
663 | * relative to, so allow as many ".." at the beginning of the path as | |
664 | * there are components in reldir. This is used for symbolic link targets. | |
665 | * If reldir is non-null and the path began with "/", to be completely like | |
666 | * a chroot we should add in depth levels of ".." at the beginning of the | |
667 | * path, but that would blow the assumption that the path doesn't grow and | |
668 | * it is not likely to end up being a valid symlink anyway, so just do | |
669 | * the normal removal of the leading "/" instead. | |
1b8e662a DD |
670 | * Contributed by Dave Dykstra <dwd@bell-labs.com> |
671 | */ | |
672 | ||
cb13abfe | 673 | void sanitize_path(char *p, char *reldir) |
1b8e662a | 674 | { |
44e2e578 | 675 | char *start, *sanp; |
cb13abfe DD |
676 | int depth = 0; |
677 | int allowdotdot = 0; | |
678 | ||
679 | if (reldir) { | |
680 | depth++; | |
681 | while (*reldir) { | |
682 | if (*reldir++ == '/') { | |
683 | depth++; | |
684 | } | |
685 | } | |
686 | } | |
44e2e578 DD |
687 | start = p; |
688 | sanp = p; | |
b5f9e67d DD |
689 | while (*p == '/') { |
690 | /* remove leading slashes */ | |
691 | p++; | |
692 | } | |
1b8e662a | 693 | while (*p != '\0') { |
b5f9e67d | 694 | /* this loop iterates once per filename component in p. |
44e2e578 | 695 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
696 | * always be left pointing after a slash |
697 | */ | |
698 | if ((*p == '.') && ((*(p+1) == '/') || (*(p+1) == '\0'))) { | |
699 | /* skip "." component */ | |
700 | while (*++p == '/') { | |
701 | /* skip following slashes */ | |
702 | ; | |
703 | } | |
cb13abfe DD |
704 | continue; |
705 | } | |
706 | allowdotdot = 0; | |
707 | if ((*p == '.') && (*(p+1) == '.') && | |
1b8e662a | 708 | ((*(p+2) == '/') || (*(p+2) == '\0'))) { |
cb13abfe DD |
709 | /* ".." component followed by slash or end */ |
710 | if ((depth > 0) && (sanp == start)) { | |
711 | /* allow depth levels of .. at the beginning */ | |
712 | --depth; | |
713 | allowdotdot = 1; | |
714 | } else { | |
715 | p += 2; | |
716 | if (*p == '/') | |
717 | p++; | |
718 | if (sanp != start) { | |
719 | /* back up sanp one level */ | |
720 | --sanp; /* now pointing at slash */ | |
721 | while ((sanp > start) && (*(sanp - 1) != '/')) { | |
722 | /* skip back up to slash */ | |
723 | sanp--; | |
724 | } | |
b5f9e67d | 725 | } |
cb13abfe | 726 | continue; |
1b8e662a | 727 | } |
cb13abfe DD |
728 | } |
729 | while (1) { | |
730 | /* copy one component through next slash */ | |
731 | *sanp++ = *p++; | |
732 | if ((*p == '\0') || (*(p-1) == '/')) { | |
733 | while (*p == '/') { | |
734 | /* skip multiple slashes */ | |
735 | p++; | |
b5f9e67d | 736 | } |
cb13abfe | 737 | break; |
1b8e662a DD |
738 | } |
739 | } | |
cb13abfe DD |
740 | if (allowdotdot) { |
741 | /* move the virtual beginning to leave the .. alone */ | |
742 | start = sanp; | |
743 | } | |
1b8e662a | 744 | } |
cb13abfe | 745 | if ((sanp == start) && !allowdotdot) { |
b5f9e67d | 746 | /* ended up with nothing, so put in "." component */ |
79452d46 DD |
747 | /* |
748 | * note that the !allowdotdot doesn't prevent this from | |
749 | * happening in all allowed ".." situations, but I didn't | |
750 | * think it was worth putting in an extra variable to ensure | |
751 | * it since an extra "." won't hurt in those situations. | |
752 | */ | |
44e2e578 | 753 | *sanp++ = '.'; |
b5f9e67d | 754 | } |
44e2e578 | 755 | *sanp = '\0'; |
1b8e662a DD |
756 | } |
757 | ||
5243c216 AT |
758 | |
759 | static char curr_dir[MAXPATHLEN]; | |
760 | ||
761 | /* like chdir() but can be reversed with pop_dir() if save is set. It | |
762 | is also much faster as it remembers where we have been */ | |
763 | char *push_dir(char *dir, int save) | |
764 | { | |
765 | char *ret = curr_dir; | |
766 | static int initialised; | |
767 | ||
768 | if (!initialised) { | |
769 | initialised = 1; | |
770 | getcwd(curr_dir, sizeof(curr_dir)-1); | |
771 | } | |
772 | ||
c226b7c2 DD |
773 | if (!dir) return NULL; /* this call was probably just to initialize */ |
774 | ||
5243c216 AT |
775 | if (chdir(dir)) return NULL; |
776 | ||
777 | if (save) { | |
778 | ret = strdup(curr_dir); | |
779 | } | |
780 | ||
781 | if (*dir == '/') { | |
37f9805d | 782 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 | 783 | } else { |
37f9805d AT |
784 | strlcat(curr_dir,"/", sizeof(curr_dir)); |
785 | strlcat(curr_dir,dir, sizeof(curr_dir)); | |
5243c216 AT |
786 | } |
787 | ||
788 | clean_fname(curr_dir); | |
789 | ||
790 | return ret; | |
791 | } | |
792 | ||
793 | /* reverse a push_dir call */ | |
794 | int pop_dir(char *dir) | |
795 | { | |
796 | int ret; | |
797 | ||
798 | ret = chdir(dir); | |
799 | if (ret) { | |
800 | free(dir); | |
801 | return ret; | |
802 | } | |
803 | ||
37f9805d | 804 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 AT |
805 | |
806 | free(dir); | |
807 | ||
808 | return 0; | |
809 | } | |
aa9b77a5 AT |
810 | |
811 | /* we need to supply our own strcmp function for file list comparisons | |
812 | to ensure that signed/unsigned usage is consistent between machines. */ | |
813 | int u_strcmp(const char *cs1, const char *cs2) | |
814 | { | |
5a788ade AT |
815 | const uchar *s1 = (const uchar *)cs1; |
816 | const uchar *s2 = (const uchar *)cs2; | |
aa9b77a5 AT |
817 | |
818 | while (*s1 && *s2 && (*s1 == *s2)) { | |
819 | s1++; s2++; | |
820 | } | |
821 | ||
822 | return (int)*s1 - (int)*s2; | |
823 | } | |
eb86d661 | 824 | |
43b06eea | 825 | static OFF_T last_ofs; |
eb86d661 | 826 | |
166aa723 | 827 | void end_progress(OFF_T size) |
eb86d661 AT |
828 | { |
829 | extern int do_progress, am_server; | |
830 | ||
831 | if (do_progress && !am_server) { | |
166aa723 | 832 | rprintf(FINFO,"%.0f (100%%)\n", (double)size); |
eb86d661 | 833 | } |
43b06eea | 834 | last_ofs = 0; |
eb86d661 AT |
835 | } |
836 | ||
837 | void show_progress(OFF_T ofs, OFF_T size) | |
838 | { | |
839 | extern int do_progress, am_server; | |
840 | ||
841 | if (do_progress && !am_server) { | |
43b06eea AT |
842 | if (ofs > last_ofs + 1000) { |
843 | int pct = (int)((100.0*ofs)/size); | |
eb86d661 | 844 | rprintf(FINFO,"%.0f (%d%%)\r", (double)ofs, pct); |
43b06eea | 845 | last_ofs = ofs; |
eb86d661 AT |
846 | } |
847 | } | |
848 | } | |
4b957c22 AT |
849 | |
850 | /* determine if a symlink points outside the current directory tree */ | |
851 | int unsafe_symlink(char *dest, char *src) | |
852 | { | |
853 | char *tok; | |
854 | int depth = 0; | |
855 | ||
856 | /* all absolute and null symlinks are unsafe */ | |
857 | if (!dest || !(*dest) || (*dest == '/')) return 1; | |
858 | ||
859 | src = strdup(src); | |
860 | if (!src) out_of_memory("unsafe_symlink"); | |
861 | ||
862 | /* find out what our safety margin is */ | |
863 | for (tok=strtok(src,"/"); tok; tok=strtok(NULL,"/")) { | |
864 | if (strcmp(tok,"..") == 0) { | |
865 | depth=0; | |
866 | } else if (strcmp(tok,".") == 0) { | |
867 | /* nothing */ | |
868 | } else { | |
869 | depth++; | |
870 | } | |
871 | } | |
872 | free(src); | |
873 | ||
874 | /* drop by one to account for the filename portion */ | |
875 | depth--; | |
876 | ||
877 | dest = strdup(dest); | |
878 | if (!dest) out_of_memory("unsafe_symlink"); | |
879 | ||
880 | for (tok=strtok(dest,"/"); tok; tok=strtok(NULL,"/")) { | |
881 | if (strcmp(tok,"..") == 0) { | |
882 | depth--; | |
883 | } else if (strcmp(tok,".") == 0) { | |
884 | /* nothing */ | |
885 | } else { | |
886 | depth++; | |
887 | } | |
888 | /* if at any point we go outside the current directory then | |
889 | stop - it is unsafe */ | |
890 | if (depth < 0) break; | |
891 | } | |
892 | ||
893 | free(dest); | |
894 | return (depth < 0); | |
895 | } | |
375a4556 | 896 | |
f7632fc6 AT |
897 | |
898 | /**************************************************************************** | |
899 | return the date and time as a string | |
900 | ****************************************************************************/ | |
901 | char *timestring(time_t t) | |
902 | { | |
903 | static char TimeBuf[200]; | |
904 | struct tm *tm = localtime(&t); | |
905 | ||
906 | #ifdef HAVE_STRFTIME | |
907 | strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %T",tm); | |
908 | #else | |
37f9805d | 909 | strlcpy(TimeBuf, asctime(tm), sizeof(TimeBuf)); |
f7632fc6 AT |
910 | #endif |
911 | ||
912 | if (TimeBuf[strlen(TimeBuf)-1] == '\n') { | |
913 | TimeBuf[strlen(TimeBuf)-1] = 0; | |
914 | } | |
915 | ||
916 | return(TimeBuf); | |
917 | } | |
918 | ||
d79d1c69 AT |
919 | |
920 | /**************************************************************************** | |
921 | like waitpid but does the WEXITSTATUS | |
922 | ****************************************************************************/ | |
dcc875e4 DD |
923 | #ifndef WEXITSTATUS |
924 | #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF)) | |
925 | #endif | |
d79d1c69 AT |
926 | void wait_process(pid_t pid, int *status) |
927 | { | |
928 | waitpid(pid, status, 0); | |
929 | *status = WEXITSTATUS(*status); | |
930 | } |