]>
Commit | Line | Data |
---|---|---|
ef416fc2 | 1 | /* |
75bd9771 | 2 | * "$Id: process.c 7256 2008-01-25 00:48:54Z mike $" |
ef416fc2 | 3 | * |
4 | * Process management routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
bf3816c7 | 6 | * Copyright 2007-2009 by Apple Inc. |
f7deaa1a | 7 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. |
ef416fc2 | 8 | * |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 14 | * |
15 | * Contents: | |
16 | * | |
a4924f6c MS |
17 | * cupsdCreateProfile() - Create an execution profile for a subprocess. |
18 | * cupsdDestroyProfile() - Delete an execution profile. | |
19 | * cupsdEndProcess() - End a process. | |
20 | * cupsdFinishProcess() - Finish a process and get its name. | |
21 | * cupsdStartProcess() - Start a process. | |
22 | * compare_procs() - Compare two processes. | |
23 | * cupsd_requote() - Make a regular-expression version of a string. | |
ef416fc2 | 24 | */ |
25 | ||
26 | /* | |
27 | * Include necessary headers... | |
28 | */ | |
29 | ||
30 | #include "cupsd.h" | |
31 | #include <grp.h> | |
a4924f6c | 32 | #ifdef __APPLE__ |
4400e98d | 33 | # include <libgen.h> |
e53920b9 | 34 | #endif /* __APPLE__ */ |
a4924f6c MS |
35 | #ifdef HAVE_SANDBOX_H |
36 | # define __APPLE_API_PRIVATE | |
37 | # include <sandbox.h> | |
38 | #endif /* HAVE_SANDBOX_H */ | |
ef416fc2 | 39 | |
40 | ||
e00b005a | 41 | /* |
42 | * Process structure... | |
43 | */ | |
44 | ||
45 | typedef struct | |
46 | { | |
b9faaae1 MS |
47 | int pid, /* Process ID */ |
48 | job_id; /* Job associated with process */ | |
e00b005a | 49 | char name[1]; /* Name of process */ |
50 | } cupsd_proc_t; | |
51 | ||
52 | ||
53 | /* | |
54 | * Local globals... | |
55 | */ | |
56 | ||
57 | static cups_array_t *process_array = NULL; | |
58 | ||
59 | ||
60 | /* | |
61 | * Local functions... | |
62 | */ | |
63 | ||
64 | static int compare_procs(cupsd_proc_t *a, cupsd_proc_t *b); | |
a4924f6c MS |
65 | #ifdef HAVE_SANDBOX_H |
66 | static char *cupsd_requote(char *dst, const char *src, size_t dstsize); | |
67 | #endif /* HAVE_SANDBOX_H */ | |
68 | ||
69 | ||
70 | /* | |
71 | * 'cupsdCreateProfile()' - Create an execution profile for a subprocess. | |
72 | */ | |
73 | ||
74 | void * /* O - Profile or NULL on error */ | |
75 | cupsdCreateProfile(int job_id) /* I - Job ID or 0 for none */ | |
76 | { | |
77 | #ifdef HAVE_SANDBOX_H | |
78 | cups_file_t *fp; /* File pointer */ | |
79 | char profile[1024], /* File containing the profile */ | |
80 | cache[1024], /* Quoted CacheDir */ | |
81 | request[1024], /* Quoted RequestRoot */ | |
82 | root[1024], /* Quoted ServerRoot */ | |
83 | temp[1024]; /* Quoted TempDir */ | |
84 | ||
85 | ||
1340db2d | 86 | if (!UseProfiles || RunUser) |
b9faaae1 MS |
87 | { |
88 | /* | |
89 | * Only use sandbox profiles as root... | |
90 | */ | |
91 | ||
92 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL", | |
93 | job_id); | |
94 | ||
95 | return (NULL); | |
96 | } | |
97 | ||
a4924f6c MS |
98 | if ((fp = cupsTempFile2(profile, sizeof(profile))) == NULL) |
99 | { | |
b9faaae1 MS |
100 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL", |
101 | job_id); | |
a4924f6c MS |
102 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create security profile: %s", |
103 | strerror(errno)); | |
104 | return (NULL); | |
105 | } | |
106 | ||
107 | cupsd_requote(cache, CacheDir, sizeof(cache)); | |
108 | cupsd_requote(request, RequestRoot, sizeof(request)); | |
109 | cupsd_requote(root, ServerRoot, sizeof(root)); | |
110 | cupsd_requote(temp, TempDir, sizeof(temp)); | |
111 | ||
112 | cupsFilePuts(fp, "(version 1)\n"); | |
113 | cupsFilePuts(fp, "(debug deny)\n"); | |
114 | cupsFilePuts(fp, "(allow default)\n"); | |
115 | cupsFilePrintf(fp, | |
116 | "(deny file-write* file-read-data file-read-metadata\n" | |
5bd77a73 | 117 | " (regex #\"^%s/\"))\n", request); |
a4924f6c MS |
118 | cupsFilePrintf(fp, |
119 | "(deny file-write*\n" | |
120 | " (regex #\"^%s\" #\"^/private/etc\" #\"^/usr/local/etc\" " | |
5bd77a73 | 121 | "#\"^/Library\" #\"^/System\" #\"^/Users\"))\n", root); |
a4924f6c MS |
122 | cupsFilePrintf(fp, |
123 | "(allow file-write* file-read-data file-read-metadata\n" | |
ed6e7faf MS |
124 | " (regex #\"^%s$\" #\"^%s/\" #\"^%s$\" #\"^%s/\"" |
125 | " #\"^/Library/Application Support/\"" | |
126 | " #\"^/Library/Caches/\"" | |
127 | " #\"^/Library/Preferences/\"" | |
128 | " #\"^/Library/Printers/\"" | |
129 | "))\n", | |
a4924f6c | 130 | temp, temp, cache, cache); |
ed6e7faf MS |
131 | cupsFilePuts(fp, |
132 | "(deny file-write*\n" | |
133 | " (regex #\"^/Library/Printers/PPDs/\"" | |
134 | " #\"^/Library/Printers/PPD Plugins/\"" | |
135 | "))\n"); | |
a4924f6c MS |
136 | if (job_id) |
137 | cupsFilePrintf(fp, | |
138 | "(allow file-read-data file-read-metadata\n" | |
139 | " (regex #\"^%s/([ac]%05d|d%05d-[0-9][0-9][0-9])$\"))\n", | |
5bd77a73 | 140 | request, job_id, job_id); |
a4924f6c MS |
141 | |
142 | cupsFileClose(fp); | |
143 | ||
5bd77a73 MS |
144 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = \"%s\"", |
145 | job_id, profile); | |
a4924f6c | 146 | return ((void *)strdup(profile)); |
b9faaae1 | 147 | |
a4924f6c | 148 | #else |
b9faaae1 MS |
149 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL", |
150 | job_id); | |
a4924f6c MS |
151 | |
152 | return (NULL); | |
153 | #endif /* HAVE_SANDBOX_H */ | |
154 | } | |
155 | ||
156 | ||
157 | /* | |
158 | * 'cupsdDestroyProfile()' - Delete an execution profile. | |
159 | */ | |
160 | ||
161 | void | |
162 | cupsdDestroyProfile(void *profile) /* I - Profile */ | |
163 | { | |
b9faaae1 MS |
164 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdDeleteProfile(profile=\"%s\")", |
165 | profile ? (char *)profile : "(null)"); | |
166 | ||
a4924f6c MS |
167 | #ifdef HAVE_SANDBOX_H |
168 | if (profile) | |
169 | { | |
170 | unlink((char *)profile); | |
171 | free(profile); | |
172 | } | |
173 | #endif /* HAVE_SANDBOX_H */ | |
174 | } | |
e00b005a | 175 | |
176 | ||
ef416fc2 | 177 | /* |
178 | * 'cupsdEndProcess()' - End a process. | |
179 | */ | |
180 | ||
181 | int /* O - 0 on success, -1 on failure */ | |
182 | cupsdEndProcess(int pid, /* I - Process ID */ | |
183 | int force) /* I - Force child to die */ | |
184 | { | |
b9faaae1 MS |
185 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdEndProcess(pid=%d, force=%d)", pid, |
186 | force); | |
187 | ||
ef416fc2 | 188 | if (force) |
189 | return (kill(pid, SIGKILL)); | |
190 | else | |
191 | return (kill(pid, SIGTERM)); | |
192 | } | |
193 | ||
194 | ||
e00b005a | 195 | /* |
196 | * 'cupsdFinishProcess()' - Finish a process and get its name. | |
197 | */ | |
198 | ||
199 | const char * /* O - Process name */ | |
200 | cupsdFinishProcess(int pid, /* I - Process ID */ | |
201 | char *name, /* I - Name buffer */ | |
b9faaae1 MS |
202 | int namelen, /* I - Size of name buffer */ |
203 | int *job_id) /* O - Job ID pointer or NULL */ | |
e00b005a | 204 | { |
205 | cupsd_proc_t key, /* Search key */ | |
206 | *proc; /* Matching process */ | |
207 | ||
208 | ||
209 | key.pid = pid; | |
210 | ||
211 | if ((proc = (cupsd_proc_t *)cupsArrayFind(process_array, &key)) != NULL) | |
212 | { | |
b9faaae1 MS |
213 | if (job_id) |
214 | *job_id = proc->job_id; | |
215 | ||
e00b005a | 216 | strlcpy(name, proc->name, namelen); |
217 | cupsArrayRemove(process_array, proc); | |
218 | free(proc); | |
e00b005a | 219 | } |
220 | else | |
b9faaae1 MS |
221 | { |
222 | if (job_id) | |
223 | *job_id = 0; | |
224 | ||
225 | strlcpy(name, "unknown", namelen); | |
226 | } | |
227 | ||
228 | cupsdLogMessage(CUPSD_LOG_DEBUG2, | |
229 | "cupsdFinishProcess(pid=%d, name=%p, namelen=%d, " | |
230 | "job_id=%p(%d)) = \"%s\"", pid, name, namelen, job_id, | |
231 | job_id ? *job_id : 0, name); | |
232 | ||
233 | return (name); | |
e00b005a | 234 | } |
235 | ||
236 | ||
ef416fc2 | 237 | /* |
238 | * 'cupsdStartProcess()' - Start a process. | |
239 | */ | |
240 | ||
241 | int /* O - Process ID or 0 */ | |
242 | cupsdStartProcess( | |
b9faaae1 MS |
243 | const char *command, /* I - Full path to command */ |
244 | char *argv[], /* I - Command-line arguments */ | |
245 | char *envp[], /* I - Environment */ | |
246 | int infd, /* I - Standard input file descriptor */ | |
247 | int outfd, /* I - Standard output file descriptor */ | |
248 | int errfd, /* I - Standard error file descriptor */ | |
249 | int backfd, /* I - Backchannel file descriptor */ | |
250 | int sidefd, /* I - Sidechannel file descriptor */ | |
251 | int root, /* I - Run as root? */ | |
252 | void *profile, /* I - Security profile to use */ | |
253 | int job_id, /* I - Job associated with process */ | |
254 | int *pid) /* O - Process ID */ | |
ef416fc2 | 255 | { |
bf3816c7 MS |
256 | int user; /* Command UID */ |
257 | struct stat commandinfo; /* Command file information */ | |
e00b005a | 258 | cupsd_proc_t *proc; /* New process record */ |
ef416fc2 | 259 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) |
e00b005a | 260 | struct sigaction action; /* POSIX signal handler */ |
ef416fc2 | 261 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ |
e53920b9 | 262 | #if defined(__APPLE__) |
e00b005a | 263 | char processPath[1024], /* CFProcessPath environment variable */ |
264 | linkpath[1024]; /* Link path for symlinks... */ | |
265 | int linkbytes; /* Bytes for link path */ | |
e53920b9 | 266 | #endif /* __APPLE__ */ |
ef416fc2 | 267 | |
268 | ||
bf3816c7 MS |
269 | if (RunUser) |
270 | user = RunUser; | |
271 | else if (root) | |
272 | user = 0; | |
273 | else | |
274 | user = User; | |
275 | ||
276 | if (stat(command, &commandinfo)) | |
76cd9e37 | 277 | { |
b9faaae1 MS |
278 | *pid = 0; |
279 | ||
280 | cupsdLogMessage(CUPSD_LOG_DEBUG2, | |
281 | "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, " | |
282 | "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, " | |
283 | "profile=%p, job_id=%d, pid=%p) = %d", | |
284 | command, argv, envp, infd, outfd, errfd, backfd, sidefd, | |
285 | root, profile, job_id, pid, *pid); | |
76cd9e37 MS |
286 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to execute %s: %s", command, |
287 | strerror(errno)); | |
288 | return (0); | |
289 | } | |
bf3816c7 MS |
290 | else if (commandinfo.st_mode & S_IWOTH) |
291 | { | |
b9faaae1 MS |
292 | *pid = 0; |
293 | ||
294 | cupsdLogMessage(CUPSD_LOG_DEBUG2, | |
295 | "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, " | |
296 | "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, " | |
297 | "profile=%p, job_id=%d, pid=%p) = %d", | |
298 | command, argv, envp, infd, outfd, errfd, backfd, sidefd, | |
299 | root, profile, job_id, pid, *pid); | |
bf3816c7 MS |
300 | cupsdLogMessage(CUPSD_LOG_ERROR, |
301 | "Unable to execute %s: insecure file permissions (0%o)", | |
302 | command, commandinfo.st_mode); | |
b9faaae1 | 303 | |
bf3816c7 MS |
304 | errno = EPERM; |
305 | return (0); | |
306 | } | |
307 | else if ((commandinfo.st_uid != user || !(commandinfo.st_mode & S_IXUSR)) && | |
308 | (commandinfo.st_gid != Group || !(commandinfo.st_mode & S_IXGRP)) && | |
309 | !(commandinfo.st_mode & S_IXOTH)) | |
310 | { | |
b9faaae1 MS |
311 | *pid = 0; |
312 | ||
313 | cupsdLogMessage(CUPSD_LOG_DEBUG2, | |
314 | "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, " | |
315 | "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, " | |
316 | "profile=%p, job_id=%d, pid=%p) = %d", | |
317 | command, argv, envp, infd, outfd, errfd, backfd, sidefd, | |
318 | root, profile, job_id, pid, *pid); | |
bf3816c7 MS |
319 | cupsdLogMessage(CUPSD_LOG_ERROR, |
320 | "Unable to execute %s: no execute permissions (0%o)", | |
321 | command, commandinfo.st_mode); | |
b9faaae1 | 322 | |
bf3816c7 MS |
323 | errno = EPERM; |
324 | return (0); | |
325 | } | |
76cd9e37 | 326 | |
e53920b9 | 327 | #if defined(__APPLE__) |
328 | if (envp) | |
e00b005a | 329 | { |
330 | /* | |
e53920b9 | 331 | * Add special voodoo magic for MacOS X - this allows MacOS X |
332 | * programs to access their bundle resources properly... | |
e00b005a | 333 | */ |
334 | ||
e53920b9 | 335 | if ((linkbytes = readlink(command, linkpath, sizeof(linkpath) - 1)) > 0) |
336 | { | |
337 | /* | |
338 | * Yes, this is a symlink to the actual program, nul-terminate and | |
339 | * use it... | |
340 | */ | |
341 | ||
342 | linkpath[linkbytes] = '\0'; | |
e00b005a | 343 | |
e53920b9 | 344 | if (linkpath[0] == '/') |
345 | snprintf(processPath, sizeof(processPath), "CFProcessPath=%s", | |
346 | linkpath); | |
347 | else | |
348 | snprintf(processPath, sizeof(processPath), "CFProcessPath=%s/%s", | |
f7deaa1a | 349 | dirname((char *)command), linkpath); |
e53920b9 | 350 | } |
e00b005a | 351 | else |
e53920b9 | 352 | snprintf(processPath, sizeof(processPath), "CFProcessPath=%s", command); |
bd7854cb | 353 | |
e53920b9 | 354 | envp[0] = processPath; /* Replace <CFProcessPath> string */ |
355 | } | |
356 | #endif /* __APPLE__ */ | |
e00b005a | 357 | |
ef416fc2 | 358 | /* |
359 | * Block signals before forking... | |
360 | */ | |
361 | ||
362 | cupsdHoldSignals(); | |
363 | ||
364 | if ((*pid = fork()) == 0) | |
365 | { | |
366 | /* | |
367 | * Child process goes here... | |
368 | * | |
369 | * Update stdin/stdout/stderr as needed... | |
370 | */ | |
371 | ||
372 | if (infd != 0) | |
373 | { | |
374 | close(0); | |
375 | if (infd > 0) | |
376 | dup(infd); | |
377 | else | |
378 | open("/dev/null", O_RDONLY); | |
379 | } | |
380 | if (outfd != 1) | |
381 | { | |
382 | close(1); | |
383 | if (outfd > 0) | |
384 | dup(outfd); | |
385 | else | |
386 | open("/dev/null", O_WRONLY); | |
387 | } | |
388 | if (errfd != 2) | |
389 | { | |
390 | close(2); | |
391 | if (errfd > 0) | |
392 | dup(errfd); | |
393 | else | |
394 | open("/dev/null", O_WRONLY); | |
395 | } | |
396 | if (backfd != 3) | |
397 | { | |
398 | close(3); | |
399 | if (backfd > 0) | |
400 | dup(backfd); | |
401 | else | |
402 | open("/dev/null", O_RDWR); | |
403 | fcntl(3, F_SETFL, O_NDELAY); | |
404 | } | |
f7deaa1a | 405 | if (sidefd != 4 && sidefd > 0) |
406 | { | |
407 | close(4); | |
408 | dup(sidefd); | |
409 | fcntl(4, F_SETFL, O_NDELAY); | |
410 | } | |
ef416fc2 | 411 | |
412 | /* | |
413 | * Change the priority of the process based on the FilterNice setting. | |
5bd77a73 | 414 | * (this is not done for root processes...) |
ef416fc2 | 415 | */ |
416 | ||
417 | if (!root) | |
418 | nice(FilterNice); | |
419 | ||
5bd77a73 MS |
420 | #ifdef HAVE_SANDBOX_H |
421 | /* | |
422 | * Run in a separate security profile... | |
423 | */ | |
424 | ||
425 | if (profile) | |
426 | { | |
427 | char *error = NULL; /* Sandbox error, if any */ | |
428 | ||
429 | if (sandbox_init((char *)profile, SANDBOX_NAMED_EXTERNAL, &error)) | |
430 | { | |
431 | fprintf(stderr, "ERROR: sandbox_init failed: %s (%s)\n", error, | |
432 | strerror(errno)); | |
433 | sandbox_free_error(error); | |
434 | } | |
435 | } | |
436 | #endif /* HAVE_SANDBOX_H */ | |
437 | ||
ef416fc2 | 438 | /* |
439 | * Change user to something "safe"... | |
440 | */ | |
441 | ||
442 | if (!root && !RunUser) | |
443 | { | |
444 | /* | |
445 | * Running as root, so change to non-priviledged user... | |
446 | */ | |
447 | ||
448 | if (setgid(Group)) | |
e00b005a | 449 | exit(errno); |
ef416fc2 | 450 | |
451 | if (setgroups(1, &Group)) | |
e00b005a | 452 | exit(errno); |
ef416fc2 | 453 | |
454 | if (setuid(User)) | |
455 | exit(errno); | |
456 | } | |
457 | else | |
458 | { | |
459 | /* | |
460 | * Reset group membership to just the main one we belong to. | |
461 | */ | |
462 | ||
e00b005a | 463 | setgid(Group); |
ef416fc2 | 464 | setgroups(1, &Group); |
465 | } | |
466 | ||
467 | /* | |
468 | * Change umask to restrict permissions on created files... | |
469 | */ | |
470 | ||
471 | umask(077); | |
472 | ||
473 | /* | |
474 | * Unblock signals before doing the exec... | |
475 | */ | |
476 | ||
477 | #ifdef HAVE_SIGSET | |
478 | sigset(SIGTERM, SIG_DFL); | |
479 | sigset(SIGCHLD, SIG_DFL); | |
480 | #elif defined(HAVE_SIGACTION) | |
481 | memset(&action, 0, sizeof(action)); | |
482 | ||
483 | sigemptyset(&action.sa_mask); | |
484 | action.sa_handler = SIG_DFL; | |
485 | ||
486 | sigaction(SIGTERM, &action, NULL); | |
487 | sigaction(SIGCHLD, &action, NULL); | |
488 | #else | |
489 | signal(SIGTERM, SIG_DFL); | |
490 | signal(SIGCHLD, SIG_DFL); | |
491 | #endif /* HAVE_SIGSET */ | |
492 | ||
493 | cupsdReleaseSignals(); | |
494 | ||
495 | /* | |
496 | * Execute the command; if for some reason this doesn't work, | |
497 | * return the error code... | |
498 | */ | |
499 | ||
500 | if (envp) | |
501 | execve(command, argv, envp); | |
502 | else | |
503 | execv(command, argv); | |
504 | ||
505 | perror(command); | |
506 | ||
507 | exit(errno); | |
508 | } | |
509 | else if (*pid < 0) | |
510 | { | |
511 | /* | |
512 | * Error - couldn't fork a new process! | |
513 | */ | |
514 | ||
515 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork %s - %s.", command, | |
516 | strerror(errno)); | |
517 | ||
518 | *pid = 0; | |
519 | } | |
e00b005a | 520 | else |
521 | { | |
522 | if (!process_array) | |
523 | process_array = cupsArrayNew((cups_array_func_t)compare_procs, NULL); | |
524 | ||
525 | if (process_array) | |
526 | { | |
527 | if ((proc = calloc(1, sizeof(cupsd_proc_t) + strlen(command))) != NULL) | |
528 | { | |
b9faaae1 MS |
529 | proc->pid = *pid; |
530 | proc->job_id = job_id; | |
e00b005a | 531 | strcpy(proc->name, command); |
532 | ||
533 | cupsArrayAdd(process_array, proc); | |
534 | } | |
535 | } | |
536 | } | |
ef416fc2 | 537 | |
538 | cupsdReleaseSignals(); | |
539 | ||
b9faaae1 MS |
540 | cupsdLogMessage(CUPSD_LOG_DEBUG2, |
541 | "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, " | |
542 | "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, " | |
543 | "profile=%p, job_id=%d, pid=%p) = %d", | |
544 | command, argv, envp, infd, outfd, errfd, backfd, sidefd, | |
545 | root, profile, job_id, pid, *pid); | |
546 | ||
ef416fc2 | 547 | return (*pid); |
548 | } | |
549 | ||
550 | ||
551 | /* | |
e00b005a | 552 | * 'compare_procs()' - Compare two processes. |
553 | */ | |
554 | ||
555 | static int /* O - Result of comparison */ | |
556 | compare_procs(cupsd_proc_t *a, /* I - First process */ | |
557 | cupsd_proc_t *b) /* I - Second process */ | |
558 | { | |
559 | return (a->pid - b->pid); | |
560 | } | |
561 | ||
562 | ||
a4924f6c MS |
563 | #ifdef HAVE_SANDBOX_H |
564 | /* | |
565 | * 'cupsd_requote()' - Make a regular-expression version of a string. | |
566 | */ | |
567 | ||
568 | static char * /* O - Quoted string */ | |
569 | cupsd_requote(char *dst, /* I - Destination buffer */ | |
570 | const char *src, /* I - Source string */ | |
571 | size_t dstsize) /* I - Size of destination buffer */ | |
572 | { | |
573 | int ch; /* Current character */ | |
574 | char *dstptr, /* Current position in buffer */ | |
575 | *dstend; /* End of destination buffer */ | |
576 | ||
577 | ||
578 | dstptr = dst; | |
579 | dstend = dst + dstsize - 2; | |
580 | ||
581 | while (*src && dstptr < dstend) | |
582 | { | |
583 | ch = *src++; | |
584 | ||
585 | if (strchr(".?*()[]^$\\", ch)) | |
586 | *dstptr++ = '\\'; | |
587 | ||
588 | *dstptr++ = ch; | |
589 | } | |
590 | ||
591 | *dstptr = '\0'; | |
592 | ||
593 | return (dst); | |
594 | } | |
595 | #endif /* HAVE_SANDBOX_H */ | |
596 | ||
597 | ||
e00b005a | 598 | /* |
75bd9771 | 599 | * End of "$Id: process.c 7256 2008-01-25 00:48:54Z mike $". |
ef416fc2 | 600 | */ |