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 | ||
08e5094d AT |
85 | /* this is derived from CVS code |
86 | ||
87 | note that in the child STDIN is set to blocking and STDOUT | |
88 | is set to non-blocking. This is necessary as rsh relies on stdin being blocking | |
89 | and ssh relies on stdout being non-blocking | |
90 | ||
91 | if blocking_io is set then use blocking io on both fds. That can be | |
92 | used to cope with badly broken rsh implementations like the one on | |
93 | solaris. | |
94 | */ | |
c627d613 AT |
95 | int piped_child(char **command,int *f_in,int *f_out) |
96 | { | |
97 | int pid; | |
98 | int to_child_pipe[2]; | |
99 | int from_child_pipe[2]; | |
c80ccabb | 100 | extern int blocking_io; |
c627d613 | 101 | |
08f15335 AT |
102 | if (fd_pair(to_child_pipe) < 0 || |
103 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 104 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 105 | exit_cleanup(RERR_IPC); |
c627d613 AT |
106 | } |
107 | ||
108 | ||
3ba62a83 | 109 | pid = do_fork(); |
c627d613 | 110 | if (pid < 0) { |
9486289c | 111 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 112 | exit_cleanup(RERR_IPC); |
c627d613 AT |
113 | } |
114 | ||
115 | if (pid == 0) | |
116 | { | |
6574b4f7 | 117 | extern int orig_umask; |
c627d613 AT |
118 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || |
119 | close(to_child_pipe[1]) < 0 || | |
120 | close(from_child_pipe[0]) < 0 || | |
121 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 122 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 123 | exit_cleanup(RERR_IPC); |
c627d613 | 124 | } |
773f2bd4 AT |
125 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); |
126 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
6574b4f7 | 127 | umask(orig_umask); |
36349ea0 | 128 | set_blocking(STDIN_FILENO); |
c80ccabb AT |
129 | if (blocking_io) { |
130 | set_blocking(STDOUT_FILENO); | |
131 | } | |
c627d613 | 132 | execvp(command[0], command); |
9486289c | 133 | rprintf(FERROR,"Failed to exec %s : %s\n", |
c627d613 | 134 | command[0],strerror(errno)); |
65417579 | 135 | exit_cleanup(RERR_IPC); |
c627d613 AT |
136 | } |
137 | ||
138 | if (close(from_child_pipe[1]) < 0 || | |
139 | close(to_child_pipe[0]) < 0) { | |
9486289c | 140 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 141 | exit_cleanup(RERR_IPC); |
c627d613 AT |
142 | } |
143 | ||
144 | *f_in = from_child_pipe[0]; | |
145 | *f_out = to_child_pipe[1]; | |
3eb38818 | 146 | |
c627d613 AT |
147 | return pid; |
148 | } | |
149 | ||
366345fe AT |
150 | int local_child(int argc, char **argv,int *f_in,int *f_out) |
151 | { | |
152 | int pid; | |
153 | int to_child_pipe[2]; | |
154 | int from_child_pipe[2]; | |
155 | ||
08f15335 AT |
156 | if (fd_pair(to_child_pipe) < 0 || |
157 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 158 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 159 | exit_cleanup(RERR_IPC); |
366345fe AT |
160 | } |
161 | ||
162 | ||
163 | pid = do_fork(); | |
164 | if (pid < 0) { | |
9486289c | 165 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 166 | exit_cleanup(RERR_IPC); |
366345fe AT |
167 | } |
168 | ||
169 | if (pid == 0) { | |
170 | extern int am_sender; | |
171 | extern int am_server; | |
172 | ||
173 | am_sender = !am_sender; | |
174 | am_server = 1; | |
175 | ||
176 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
177 | close(to_child_pipe[1]) < 0 || | |
178 | close(from_child_pipe[0]) < 0 || | |
179 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 180 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 181 | exit_cleanup(RERR_IPC); |
366345fe AT |
182 | } |
183 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); | |
184 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
9486289c | 185 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
366345fe AT |
186 | } |
187 | ||
188 | if (close(from_child_pipe[1]) < 0 || | |
189 | close(to_child_pipe[0]) < 0) { | |
9486289c | 190 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 191 | exit_cleanup(RERR_IPC); |
366345fe AT |
192 | } |
193 | ||
194 | *f_in = from_child_pipe[0]; | |
195 | *f_out = to_child_pipe[1]; | |
196 | ||
197 | return pid; | |
198 | } | |
199 | ||
200 | ||
c627d613 AT |
201 | |
202 | void out_of_memory(char *str) | |
203 | { | |
9486289c | 204 | rprintf(FERROR,"ERROR: out of memory in %s\n",str); |
65417579 | 205 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
206 | } |
207 | ||
208 | void overflow(char *str) | |
209 | { | |
9486289c | 210 | rprintf(FERROR,"ERROR: buffer overflow in %s\n",str); |
65417579 | 211 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
212 | } |
213 | ||
214 | ||
c627d613 AT |
215 | |
216 | int set_modtime(char *fname,time_t modtime) | |
217 | { | |
31e12522 AT |
218 | extern int dry_run; |
219 | if (dry_run) return 0; | |
220 | { | |
1e9f155a | 221 | #ifdef HAVE_UTIMBUF |
31e12522 AT |
222 | struct utimbuf tbuf; |
223 | tbuf.actime = time(NULL); | |
224 | tbuf.modtime = modtime; | |
225 | return utime(fname,&tbuf); | |
c627d613 | 226 | #elif defined(HAVE_UTIME) |
31e12522 AT |
227 | time_t t[2]; |
228 | t[0] = time(NULL); | |
229 | t[1] = modtime; | |
230 | return utime(fname,t); | |
c627d613 | 231 | #else |
31e12522 AT |
232 | struct timeval t[2]; |
233 | t[0].tv_sec = time(NULL); | |
234 | t[0].tv_usec = 0; | |
235 | t[1].tv_sec = modtime; | |
236 | t[1].tv_usec = 0; | |
237 | return utimes(fname,t); | |
c627d613 | 238 | #endif |
31e12522 | 239 | } |
c627d613 | 240 | } |
94481d91 | 241 | |
720b47f2 | 242 | |
6574b4f7 AT |
243 | /**************************************************************************** |
244 | create any necessary directories in fname. Unfortunately we don't know | |
245 | what perms to give the directory when this is called so we need to rely | |
246 | on the umask | |
247 | ****************************************************************************/ | |
248 | int create_directory_path(char *fname) | |
249 | { | |
250 | extern int orig_umask; | |
251 | char *p; | |
252 | ||
253 | while (*fname == '/') fname++; | |
254 | while (strncmp(fname,"./",2)==0) fname += 2; | |
255 | ||
256 | p = fname; | |
257 | while ((p=strchr(p,'/'))) { | |
258 | *p = 0; | |
1b2d733a | 259 | do_mkdir(fname,0777 & ~orig_umask); |
6574b4f7 AT |
260 | *p = '/'; |
261 | p++; | |
262 | } | |
263 | return 0; | |
264 | } | |
950ab32d AT |
265 | |
266 | ||
267 | /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted. | |
268 | Return LEN upon success, write's (negative) error code otherwise. | |
269 | ||
270 | derived from GNU C's cccp.c. | |
271 | */ | |
a5343e76 | 272 | static int full_write(int desc, char *ptr, int len) |
950ab32d AT |
273 | { |
274 | int total_written; | |
275 | ||
276 | total_written = 0; | |
277 | while (len > 0) { | |
278 | int written = write (desc, ptr, len); | |
279 | if (written < 0) { | |
280 | #ifdef EINTR | |
281 | if (errno == EINTR) | |
282 | continue; | |
283 | #endif | |
284 | return written; | |
285 | } | |
286 | total_written += written; | |
287 | ptr += written; | |
288 | len -= written; | |
289 | } | |
290 | return total_written; | |
291 | } | |
292 | ||
293 | /* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. | |
294 | Return the actual number of bytes read, zero for EOF, or negative | |
295 | for an error. | |
296 | ||
297 | derived from GNU C's cccp.c. */ | |
6e4fb64e | 298 | static int safe_read(int desc, char *ptr, int len) |
950ab32d AT |
299 | { |
300 | int n_chars; | |
301 | ||
302 | if (len <= 0) | |
303 | return len; | |
304 | ||
305 | #ifdef EINTR | |
306 | do { | |
307 | n_chars = read(desc, ptr, len); | |
308 | } while (n_chars < 0 && errno == EINTR); | |
309 | #else | |
310 | n_chars = read(desc, ptr, len); | |
311 | #endif | |
312 | ||
313 | return n_chars; | |
314 | } | |
315 | ||
316 | ||
317 | /* copy a file - this is used in conjunction with the --temp-dir option */ | |
318 | int copy_file(char *source, char *dest, mode_t mode) | |
319 | { | |
320 | int ifd; | |
321 | int ofd; | |
322 | char buf[1024 * 8]; | |
323 | int len; /* Number of bytes read into `buf'. */ | |
324 | ||
8c9fd200 | 325 | ifd = do_open(source, O_RDONLY, 0); |
950ab32d | 326 | if (ifd == -1) { |
9486289c | 327 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
328 | source,strerror(errno)); |
329 | return -1; | |
330 | } | |
331 | ||
c7c11a0d | 332 | if (robust_unlink(dest) && errno != ENOENT) { |
9486289c | 333 | rprintf(FERROR,"unlink %s: %s\n", |
950ab32d AT |
334 | dest,strerror(errno)); |
335 | return -1; | |
336 | } | |
337 | ||
31e12522 | 338 | ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode); |
c46ded46 | 339 | if (ofd == -1) { |
9486289c | 340 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
341 | dest,strerror(errno)); |
342 | close(ifd); | |
343 | return -1; | |
344 | } | |
345 | ||
346 | while ((len = safe_read(ifd, buf, sizeof(buf))) > 0) { | |
347 | if (full_write(ofd, buf, len) < 0) { | |
9486289c | 348 | rprintf(FERROR,"write %s: %s\n", |
950ab32d AT |
349 | dest,strerror(errno)); |
350 | close(ifd); | |
351 | close(ofd); | |
352 | return -1; | |
353 | } | |
354 | } | |
355 | ||
356 | close(ifd); | |
357 | close(ofd); | |
358 | ||
359 | if (len < 0) { | |
9486289c | 360 | rprintf(FERROR,"read %s: %s\n", |
950ab32d AT |
361 | source,strerror(errno)); |
362 | return -1; | |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
feaa89c4 | 367 | |
c7c11a0d DD |
368 | /* |
369 | Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so | |
370 | rename to <path>/.rsyncNNN instead. Note that successive rsync runs | |
371 | will shuffle the filenames around a bit as long as the file is still | |
372 | busy; this is because this function does not know if the unlink call | |
373 | is due to a new file coming in, or --delete trying to remove old | |
374 | .rsyncNNN files, hence it renames it each time. | |
375 | */ | |
376 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ | |
377 | #define MAX_RENAMES_DIGITS 3 | |
378 | #define MAX_RENAMES 1000 | |
379 | ||
380 | int robust_unlink(char *fname) | |
381 | { | |
382 | #ifndef ETXTBSY | |
383 | return do_unlink(fname); | |
384 | #else | |
385 | static int counter = 1; | |
386 | int rc, pos, start; | |
387 | char path[MAXPATHLEN]; | |
388 | ||
389 | rc = do_unlink(fname); | |
390 | if ((rc == 0) || (errno != ETXTBSY)) | |
391 | return rc; | |
392 | ||
393 | strlcpy(path, fname, MAXPATHLEN); | |
394 | ||
395 | pos = strlen(path); | |
396 | while((path[--pos] != '/') && (pos >= 0)) | |
397 | ; | |
398 | ++pos; | |
399 | strlcpy(&path[pos], ".rsync", MAXPATHLEN-pos); | |
400 | pos += sizeof(".rsync")-1; | |
401 | ||
402 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
403 | errno = ETXTBSY; | |
404 | return -1; | |
405 | } | |
406 | ||
407 | /* start where the last one left off to reduce chance of clashes */ | |
408 | start = counter; | |
409 | do { | |
410 | sprintf(&path[pos], "%03d", counter); | |
411 | if (++counter >= MAX_RENAMES) | |
412 | counter = 1; | |
413 | } while (((rc = access(path, 0)) == 0) && (counter != start)); | |
414 | ||
415 | if (verbose > 0) | |
416 | rprintf(FINFO,"renaming %s to %s because of text busy\n", | |
417 | fname, path); | |
418 | ||
419 | /* maybe we should return rename()'s exit status? Nah. */ | |
420 | if (do_rename(fname, path) != 0) { | |
421 | errno = ETXTBSY; | |
422 | return -1; | |
423 | } | |
424 | return 0; | |
425 | #endif | |
426 | } | |
427 | ||
428 | int robust_rename(char *from, char *to) | |
429 | { | |
430 | #ifndef ETXTBSY | |
431 | return do_rename(from, to); | |
432 | #else | |
433 | int rc = do_rename(from, to); | |
434 | if ((rc == 0) || (errno != ETXTBSY)) | |
435 | return rc; | |
436 | if (robust_unlink(to) != 0) | |
437 | return -1; | |
438 | return do_rename(from, to); | |
439 | #endif | |
feaa89c4 | 440 | } |
3ba62a83 AT |
441 | |
442 | ||
443 | static pid_t all_pids[10]; | |
444 | static int num_pids; | |
445 | ||
446 | /* fork and record the pid of the child */ | |
447 | pid_t do_fork(void) | |
448 | { | |
449 | pid_t newpid = fork(); | |
450 | ||
451 | if (newpid) { | |
452 | all_pids[num_pids++] = newpid; | |
453 | } | |
454 | return newpid; | |
455 | } | |
456 | ||
457 | /* kill all children */ | |
458 | void kill_all(int sig) | |
459 | { | |
460 | int i; | |
461 | for (i=0;i<num_pids;i++) { | |
462 | if (all_pids[i] != getpid()) | |
463 | kill(all_pids[i], sig); | |
464 | } | |
465 | } | |
9486289c | 466 | |
8ef4ffd6 AT |
467 | /* turn a user name into a uid */ |
468 | int name_to_uid(char *name, uid_t *uid) | |
469 | { | |
470 | struct passwd *pass; | |
471 | if (!name || !*name) return 0; | |
472 | pass = getpwnam(name); | |
473 | if (pass) { | |
474 | *uid = pass->pw_uid; | |
475 | return 1; | |
476 | } | |
477 | return 0; | |
478 | } | |
479 | ||
480 | /* turn a group name into a gid */ | |
481 | int name_to_gid(char *name, gid_t *gid) | |
482 | { | |
483 | struct group *grp; | |
484 | if (!name || !*name) return 0; | |
485 | grp = getgrnam(name); | |
486 | if (grp) { | |
487 | *gid = grp->gr_gid; | |
488 | return 1; | |
489 | } | |
490 | return 0; | |
491 | } | |
492 | ||
ff8b29b8 | 493 | |
31593dd6 AT |
494 | /* lock a byte range in a open file */ |
495 | int lock_range(int fd, int offset, int len) | |
0c515f17 | 496 | { |
31593dd6 | 497 | struct flock lock; |
0c515f17 | 498 | |
31593dd6 AT |
499 | lock.l_type = F_WRLCK; |
500 | lock.l_whence = SEEK_SET; | |
501 | lock.l_start = offset; | |
502 | lock.l_len = len; | |
503 | lock.l_pid = 0; | |
504 | ||
505 | return fcntl(fd,F_SETLK,&lock) == 0; | |
0c515f17 | 506 | } |
874895d5 AT |
507 | |
508 | ||
cb13abfe | 509 | static void glob_expand_one(char *s, char **argv, int *argc, int maxargs) |
874895d5 | 510 | { |
932be9aa | 511 | #if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H)) |
e42c9458 | 512 | if (!*s) s = "."; |
087bf010 | 513 | argv[*argc] = strdup(s); |
874895d5 AT |
514 | (*argc)++; |
515 | return; | |
516 | #else | |
cb13abfe | 517 | extern int sanitize_paths; |
874895d5 AT |
518 | glob_t globbuf; |
519 | int i; | |
520 | ||
e42c9458 AT |
521 | if (!*s) s = "."; |
522 | ||
cb13abfe DD |
523 | argv[*argc] = strdup(s); |
524 | if (sanitize_paths) { | |
525 | sanitize_path(argv[*argc], NULL); | |
526 | } | |
087bf010 | 527 | |
874895d5 AT |
528 | memset(&globbuf, 0, sizeof(globbuf)); |
529 | glob(argv[*argc], 0, NULL, &globbuf); | |
530 | if (globbuf.gl_pathc == 0) { | |
531 | (*argc)++; | |
532 | globfree(&globbuf); | |
533 | return; | |
534 | } | |
535 | for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) { | |
536 | if (i == 0) free(argv[*argc]); | |
537 | argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]); | |
538 | if (!argv[(*argc) + i]) out_of_memory("glob_expand"); | |
539 | } | |
540 | globfree(&globbuf); | |
541 | (*argc) += i; | |
542 | #endif | |
543 | } | |
5a96ee05 | 544 | |
cb13abfe | 545 | void glob_expand(char *base1, char **argv, int *argc, int maxargs) |
087bf010 AT |
546 | { |
547 | char *s = argv[*argc]; | |
548 | char *p, *q; | |
ba5e128d | 549 | char *base = base1; |
087bf010 AT |
550 | |
551 | if (!s || !*s) return; | |
552 | ||
e42c9458 AT |
553 | if (strncmp(s, base, strlen(base)) == 0) { |
554 | s += strlen(base); | |
555 | } | |
556 | ||
087bf010 AT |
557 | s = strdup(s); |
558 | if (!s) out_of_memory("glob_expand"); | |
559 | ||
ba5e128d AT |
560 | base = (char *)malloc(strlen(base1)+3); |
561 | if (!base) out_of_memory("glob_expand"); | |
562 | ||
563 | sprintf(base," %s/", base1); | |
564 | ||
087bf010 AT |
565 | q = s; |
566 | while ((p = strstr(q,base)) && ((*argc) < maxargs)) { | |
ba5e128d AT |
567 | /* split it at this point */ |
568 | *p = 0; | |
cb13abfe | 569 | glob_expand_one(q, argv, argc, maxargs); |
ba5e128d | 570 | q = p+strlen(base); |
087bf010 AT |
571 | } |
572 | ||
cb13abfe | 573 | if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs); |
087bf010 AT |
574 | |
575 | free(s); | |
ba5e128d | 576 | free(base); |
087bf010 | 577 | } |
5a96ee05 AT |
578 | |
579 | /******************************************************************* | |
580 | convert a string to lower case | |
581 | ********************************************************************/ | |
582 | void strlower(char *s) | |
583 | { | |
584 | while (*s) { | |
585 | if (isupper(*s)) *s = tolower(*s); | |
586 | s++; | |
587 | } | |
588 | } | |
e42c9458 | 589 | |
37f9805d AT |
590 | /* this is like vsnprintf but it always null terminates, so you |
591 | can fit at most n-1 chars in */ | |
e42c9458 AT |
592 | int vslprintf(char *str, int n, const char *format, va_list ap) |
593 | { | |
e42c9458 | 594 | int ret = vsnprintf(str, n, format, ap); |
37f9805d AT |
595 | if (ret >= n || ret < 0) { |
596 | str[n-1] = 0; | |
e42c9458 AT |
597 | return -1; |
598 | } | |
599 | str[ret] = 0; | |
600 | return ret; | |
e42c9458 AT |
601 | } |
602 | ||
603 | ||
604 | /* like snprintf but always null terminates */ | |
605 | int slprintf(char *str, int n, char *format, ...) | |
606 | { | |
607 | va_list ap; | |
608 | int ret; | |
609 | ||
610 | va_start(ap, format); | |
611 | ret = vslprintf(str,n,format,ap); | |
612 | va_end(ap); | |
613 | return ret; | |
614 | } | |
8d9dc9f9 | 615 | |
fe8c0a98 AT |
616 | |
617 | void *Realloc(void *p, int size) | |
618 | { | |
619 | if (!p) return (void *)malloc(size); | |
620 | return (void *)realloc(p, size); | |
621 | } | |
5243c216 AT |
622 | |
623 | ||
624 | void clean_fname(char *name) | |
625 | { | |
626 | char *p; | |
627 | int l; | |
628 | int modified = 1; | |
629 | ||
630 | if (!name) return; | |
631 | ||
632 | while (modified) { | |
633 | modified = 0; | |
634 | ||
635 | if ((p=strstr(name,"/./"))) { | |
636 | modified = 1; | |
637 | while (*p) { | |
638 | p[0] = p[2]; | |
639 | p++; | |
640 | } | |
641 | } | |
642 | ||
643 | if ((p=strstr(name,"//"))) { | |
644 | modified = 1; | |
645 | while (*p) { | |
646 | p[0] = p[1]; | |
647 | p++; | |
648 | } | |
649 | } | |
650 | ||
651 | if (strncmp(p=name,"./",2) == 0) { | |
652 | modified = 1; | |
653 | do { | |
654 | p[0] = p[2]; | |
655 | } while (*p++); | |
656 | } | |
657 | ||
658 | l = strlen(p=name); | |
659 | if (l > 1 && p[l-1] == '/') { | |
660 | modified = 1; | |
661 | p[l-1] = 0; | |
662 | } | |
663 | } | |
664 | } | |
665 | ||
1b8e662a DD |
666 | /* |
667 | * Make path appear as if a chroot had occurred: | |
1b8e662a | 668 | * 1. remove leading "/" (or replace with "." if at end) |
cb13abfe | 669 | * 2. remove leading ".." components (except those allowed by "reldir") |
1b8e662a | 670 | * 3. delete any other "<dir>/.." (recursively) |
79452d46 | 671 | * Can only shrink paths, so sanitizes in place. |
b5f9e67d DD |
672 | * While we're at it, remove double slashes and "." components like |
673 | * clean_fname does(), but DON'T remove a trailing slash because that | |
674 | * is sometimes significant on command line arguments. | |
79452d46 DD |
675 | * If "reldir" is non-null, it is a sanitized directory that the path will be |
676 | * relative to, so allow as many ".." at the beginning of the path as | |
677 | * there are components in reldir. This is used for symbolic link targets. | |
678 | * If reldir is non-null and the path began with "/", to be completely like | |
679 | * a chroot we should add in depth levels of ".." at the beginning of the | |
680 | * path, but that would blow the assumption that the path doesn't grow and | |
681 | * it is not likely to end up being a valid symlink anyway, so just do | |
682 | * the normal removal of the leading "/" instead. | |
1b8e662a DD |
683 | * Contributed by Dave Dykstra <dwd@bell-labs.com> |
684 | */ | |
685 | ||
cb13abfe | 686 | void sanitize_path(char *p, char *reldir) |
1b8e662a | 687 | { |
44e2e578 | 688 | char *start, *sanp; |
cb13abfe DD |
689 | int depth = 0; |
690 | int allowdotdot = 0; | |
691 | ||
692 | if (reldir) { | |
693 | depth++; | |
694 | while (*reldir) { | |
695 | if (*reldir++ == '/') { | |
696 | depth++; | |
697 | } | |
698 | } | |
699 | } | |
44e2e578 DD |
700 | start = p; |
701 | sanp = p; | |
b5f9e67d DD |
702 | while (*p == '/') { |
703 | /* remove leading slashes */ | |
704 | p++; | |
705 | } | |
1b8e662a | 706 | while (*p != '\0') { |
b5f9e67d | 707 | /* this loop iterates once per filename component in p. |
44e2e578 | 708 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
709 | * always be left pointing after a slash |
710 | */ | |
711 | if ((*p == '.') && ((*(p+1) == '/') || (*(p+1) == '\0'))) { | |
712 | /* skip "." component */ | |
713 | while (*++p == '/') { | |
714 | /* skip following slashes */ | |
715 | ; | |
716 | } | |
cb13abfe DD |
717 | continue; |
718 | } | |
719 | allowdotdot = 0; | |
720 | if ((*p == '.') && (*(p+1) == '.') && | |
1b8e662a | 721 | ((*(p+2) == '/') || (*(p+2) == '\0'))) { |
cb13abfe DD |
722 | /* ".." component followed by slash or end */ |
723 | if ((depth > 0) && (sanp == start)) { | |
724 | /* allow depth levels of .. at the beginning */ | |
725 | --depth; | |
726 | allowdotdot = 1; | |
727 | } else { | |
728 | p += 2; | |
729 | if (*p == '/') | |
730 | p++; | |
731 | if (sanp != start) { | |
732 | /* back up sanp one level */ | |
733 | --sanp; /* now pointing at slash */ | |
734 | while ((sanp > start) && (*(sanp - 1) != '/')) { | |
735 | /* skip back up to slash */ | |
736 | sanp--; | |
737 | } | |
b5f9e67d | 738 | } |
cb13abfe | 739 | continue; |
1b8e662a | 740 | } |
cb13abfe DD |
741 | } |
742 | while (1) { | |
743 | /* copy one component through next slash */ | |
744 | *sanp++ = *p++; | |
745 | if ((*p == '\0') || (*(p-1) == '/')) { | |
746 | while (*p == '/') { | |
747 | /* skip multiple slashes */ | |
748 | p++; | |
b5f9e67d | 749 | } |
cb13abfe | 750 | break; |
1b8e662a DD |
751 | } |
752 | } | |
cb13abfe DD |
753 | if (allowdotdot) { |
754 | /* move the virtual beginning to leave the .. alone */ | |
755 | start = sanp; | |
756 | } | |
1b8e662a | 757 | } |
cb13abfe | 758 | if ((sanp == start) && !allowdotdot) { |
b5f9e67d | 759 | /* ended up with nothing, so put in "." component */ |
79452d46 DD |
760 | /* |
761 | * note that the !allowdotdot doesn't prevent this from | |
762 | * happening in all allowed ".." situations, but I didn't | |
763 | * think it was worth putting in an extra variable to ensure | |
764 | * it since an extra "." won't hurt in those situations. | |
765 | */ | |
44e2e578 | 766 | *sanp++ = '.'; |
b5f9e67d | 767 | } |
44e2e578 | 768 | *sanp = '\0'; |
1b8e662a DD |
769 | } |
770 | ||
5243c216 AT |
771 | |
772 | static char curr_dir[MAXPATHLEN]; | |
773 | ||
774 | /* like chdir() but can be reversed with pop_dir() if save is set. It | |
775 | is also much faster as it remembers where we have been */ | |
776 | char *push_dir(char *dir, int save) | |
777 | { | |
778 | char *ret = curr_dir; | |
779 | static int initialised; | |
780 | ||
781 | if (!initialised) { | |
782 | initialised = 1; | |
783 | getcwd(curr_dir, sizeof(curr_dir)-1); | |
784 | } | |
785 | ||
c226b7c2 DD |
786 | if (!dir) return NULL; /* this call was probably just to initialize */ |
787 | ||
5243c216 AT |
788 | if (chdir(dir)) return NULL; |
789 | ||
790 | if (save) { | |
791 | ret = strdup(curr_dir); | |
792 | } | |
793 | ||
794 | if (*dir == '/') { | |
37f9805d | 795 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 | 796 | } else { |
37f9805d AT |
797 | strlcat(curr_dir,"/", sizeof(curr_dir)); |
798 | strlcat(curr_dir,dir, sizeof(curr_dir)); | |
5243c216 AT |
799 | } |
800 | ||
801 | clean_fname(curr_dir); | |
802 | ||
803 | return ret; | |
804 | } | |
805 | ||
806 | /* reverse a push_dir call */ | |
807 | int pop_dir(char *dir) | |
808 | { | |
809 | int ret; | |
810 | ||
811 | ret = chdir(dir); | |
812 | if (ret) { | |
813 | free(dir); | |
814 | return ret; | |
815 | } | |
816 | ||
37f9805d | 817 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 AT |
818 | |
819 | free(dir); | |
820 | ||
821 | return 0; | |
822 | } | |
aa9b77a5 AT |
823 | |
824 | /* we need to supply our own strcmp function for file list comparisons | |
825 | to ensure that signed/unsigned usage is consistent between machines. */ | |
826 | int u_strcmp(const char *cs1, const char *cs2) | |
827 | { | |
5a788ade AT |
828 | const uchar *s1 = (const uchar *)cs1; |
829 | const uchar *s2 = (const uchar *)cs2; | |
aa9b77a5 AT |
830 | |
831 | while (*s1 && *s2 && (*s1 == *s2)) { | |
832 | s1++; s2++; | |
833 | } | |
834 | ||
835 | return (int)*s1 - (int)*s2; | |
836 | } | |
eb86d661 | 837 | |
43b06eea | 838 | static OFF_T last_ofs; |
eb86d661 | 839 | |
166aa723 | 840 | void end_progress(OFF_T size) |
eb86d661 AT |
841 | { |
842 | extern int do_progress, am_server; | |
843 | ||
844 | if (do_progress && !am_server) { | |
166aa723 | 845 | rprintf(FINFO,"%.0f (100%%)\n", (double)size); |
eb86d661 | 846 | } |
43b06eea | 847 | last_ofs = 0; |
eb86d661 AT |
848 | } |
849 | ||
850 | void show_progress(OFF_T ofs, OFF_T size) | |
851 | { | |
852 | extern int do_progress, am_server; | |
853 | ||
854 | if (do_progress && !am_server) { | |
43b06eea AT |
855 | if (ofs > last_ofs + 1000) { |
856 | int pct = (int)((100.0*ofs)/size); | |
eb86d661 | 857 | rprintf(FINFO,"%.0f (%d%%)\r", (double)ofs, pct); |
43b06eea | 858 | last_ofs = ofs; |
eb86d661 AT |
859 | } |
860 | } | |
861 | } | |
4b957c22 AT |
862 | |
863 | /* determine if a symlink points outside the current directory tree */ | |
864 | int unsafe_symlink(char *dest, char *src) | |
865 | { | |
866 | char *tok; | |
867 | int depth = 0; | |
868 | ||
869 | /* all absolute and null symlinks are unsafe */ | |
870 | if (!dest || !(*dest) || (*dest == '/')) return 1; | |
871 | ||
872 | src = strdup(src); | |
873 | if (!src) out_of_memory("unsafe_symlink"); | |
874 | ||
875 | /* find out what our safety margin is */ | |
876 | for (tok=strtok(src,"/"); tok; tok=strtok(NULL,"/")) { | |
877 | if (strcmp(tok,"..") == 0) { | |
878 | depth=0; | |
879 | } else if (strcmp(tok,".") == 0) { | |
880 | /* nothing */ | |
881 | } else { | |
882 | depth++; | |
883 | } | |
884 | } | |
885 | free(src); | |
886 | ||
887 | /* drop by one to account for the filename portion */ | |
888 | depth--; | |
889 | ||
890 | dest = strdup(dest); | |
891 | if (!dest) out_of_memory("unsafe_symlink"); | |
892 | ||
893 | for (tok=strtok(dest,"/"); tok; tok=strtok(NULL,"/")) { | |
894 | if (strcmp(tok,"..") == 0) { | |
895 | depth--; | |
896 | } else if (strcmp(tok,".") == 0) { | |
897 | /* nothing */ | |
898 | } else { | |
899 | depth++; | |
900 | } | |
901 | /* if at any point we go outside the current directory then | |
902 | stop - it is unsafe */ | |
903 | if (depth < 0) break; | |
904 | } | |
905 | ||
906 | free(dest); | |
907 | return (depth < 0); | |
908 | } | |
375a4556 | 909 | |
f7632fc6 AT |
910 | |
911 | /**************************************************************************** | |
912 | return the date and time as a string | |
913 | ****************************************************************************/ | |
914 | char *timestring(time_t t) | |
915 | { | |
916 | static char TimeBuf[200]; | |
917 | struct tm *tm = localtime(&t); | |
918 | ||
919 | #ifdef HAVE_STRFTIME | |
920 | strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %T",tm); | |
921 | #else | |
37f9805d | 922 | strlcpy(TimeBuf, asctime(tm), sizeof(TimeBuf)); |
f7632fc6 AT |
923 | #endif |
924 | ||
925 | if (TimeBuf[strlen(TimeBuf)-1] == '\n') { | |
926 | TimeBuf[strlen(TimeBuf)-1] = 0; | |
927 | } | |
928 | ||
929 | return(TimeBuf); | |
930 | } | |
931 | ||
9ec16c83 AT |
932 | |
933 | /******************************************************************* | |
934 | sleep for a specified number of milliseconds | |
935 | ********************************************************************/ | |
936 | void msleep(int t) | |
937 | { | |
938 | int tdiff=0; | |
939 | struct timeval tval,t1,t2; | |
940 | ||
941 | gettimeofday(&t1, NULL); | |
942 | gettimeofday(&t2, NULL); | |
943 | ||
944 | while (tdiff < t) { | |
945 | tval.tv_sec = (t-tdiff)/1000; | |
946 | tval.tv_usec = 1000*((t-tdiff)%1000); | |
947 | ||
948 | errno = 0; | |
949 | select(0,NULL,NULL, NULL, &tval); | |
950 | ||
951 | gettimeofday(&t2, NULL); | |
952 | tdiff = (t2.tv_sec - t1.tv_sec)*1000 + | |
953 | (t2.tv_usec - t1.tv_usec)/1000; | |
954 | } | |
955 | } | |
956 | ||
957 | ||
5b56cc19 AT |
958 | /******************************************************************* |
959 | Determine if two file modification times are equivalent (either exact | |
960 | or in the modification timestamp window established by --modify-window) | |
961 | Returns 0 if the times should be treated as the same, 1 if the | |
962 | first is later and -1 if the 2nd is later | |
963 | *******************************************************************/ | |
964 | int cmp_modtime(time_t file1, time_t file2) | |
965 | { | |
966 | time_t diff; | |
967 | extern int modify_window; | |
968 | ||
969 | if (file2 > file1) { | |
970 | if (file2 - file1 <= modify_window) return 0; | |
971 | return -1; | |
972 | } | |
973 | if (file1 - file2 <= modify_window) return 0; | |
974 | return 1; | |
975 | } | |
976 | ||
977 | ||
978 | #ifdef __INSURE__XX | |
0f8f98c8 AT |
979 | #include <dlfcn.h> |
980 | ||
981 | /******************************************************************* | |
982 | This routine is a trick to immediately catch errors when debugging | |
983 | with insure. A xterm with a gdb is popped up when insure catches | |
984 | a error. It is Linux specific. | |
985 | ********************************************************************/ | |
986 | int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6) | |
987 | { | |
988 | static int (*fn)(); | |
989 | int ret; | |
990 | char cmd[1024]; | |
991 | ||
992 | sprintf(cmd, "/usr/X11R6/bin/xterm -display :0 -T Panic -n Panic -e /bin/sh -c 'cat /tmp/ierrs.*.%d ; gdb /proc/%d/exe %d'", | |
993 | getpid(), getpid(), getpid()); | |
994 | ||
995 | if (!fn) { | |
996 | static void *h; | |
997 | h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY); | |
998 | fn = dlsym(h, "_Insure_trap_error"); | |
999 | } | |
1000 | ||
1001 | ret = fn(a1, a2, a3, a4, a5, a6); | |
1002 | ||
1003 | system(cmd); | |
1004 | ||
1005 | return ret; | |
1006 | } | |
1007 | #endif |