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Commit | Line | Data |
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ef416fc2 | 1 | /* |
f2d18633 | 2 | * "$Id$" |
ef416fc2 | 3 | * |
7e86f2f6 | 4 | * Process management routines for the CUPS scheduler. |
ef416fc2 | 5 | * |
7e86f2f6 MS |
6 | * Copyright 2007-2014 by Apple Inc. |
7 | * Copyright 1997-2007 by Easy Software Products, all rights reserved. | |
ef416fc2 | 8 | * |
7e86f2f6 MS |
9 | * These coded instructions, statements, and computer programs are the |
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 | ||
16 | /* | |
17 | * Include necessary headers... | |
18 | */ | |
19 | ||
20 | #include "cupsd.h" | |
21 | #include <grp.h> | |
a4924f6c | 22 | #ifdef __APPLE__ |
4400e98d | 23 | # include <libgen.h> |
6d2f911b | 24 | #endif /* __APPLE__ */ |
c82f05ea MS |
25 | #ifdef HAVE_POSIX_SPAWN |
26 | # include <spawn.h> | |
27 | extern char **environ; | |
28 | #endif /* HAVE_POSIX_SPAWN */ | |
ef416fc2 | 29 | |
30 | ||
e00b005a | 31 | /* |
32 | * Process structure... | |
33 | */ | |
34 | ||
35 | typedef struct | |
36 | { | |
b9faaae1 MS |
37 | int pid, /* Process ID */ |
38 | job_id; /* Job associated with process */ | |
e00b005a | 39 | char name[1]; /* Name of process */ |
40 | } cupsd_proc_t; | |
41 | ||
42 | ||
43 | /* | |
44 | * Local globals... | |
45 | */ | |
46 | ||
47 | static cups_array_t *process_array = NULL; | |
48 | ||
49 | ||
50 | /* | |
51 | * Local functions... | |
52 | */ | |
53 | ||
54 | static int compare_procs(cupsd_proc_t *a, cupsd_proc_t *b); | |
a4924f6c MS |
55 | #ifdef HAVE_SANDBOX_H |
56 | static char *cupsd_requote(char *dst, const char *src, size_t dstsize); | |
57 | #endif /* HAVE_SANDBOX_H */ | |
58 | ||
59 | ||
60 | /* | |
61 | * 'cupsdCreateProfile()' - Create an execution profile for a subprocess. | |
62 | */ | |
63 | ||
64 | void * /* O - Profile or NULL on error */ | |
8fe0183a MS |
65 | cupsdCreateProfile(int job_id, /* I - Job ID or 0 for none */ |
66 | int allow_networking)/* I - Allow networking off machine? */ | |
a4924f6c MS |
67 | { |
68 | #ifdef HAVE_SANDBOX_H | |
8fe0183a MS |
69 | cups_file_t *fp; /* File pointer */ |
70 | char profile[1024], /* File containing the profile */ | |
71 | bin[1024], /* Quoted ServerBin */ | |
72 | cache[1024], /* Quoted CacheDir */ | |
73 | domain[1024], /* Domain socket, if any */ | |
74 | request[1024], /* Quoted RequestRoot */ | |
75 | root[1024], /* Quoted ServerRoot */ | |
76 | temp[1024]; /* Quoted TempDir */ | |
77 | const char *nodebug; /* " (with no-log)" for no debug */ | |
78 | cupsd_listener_t *lis; /* Current listening socket */ | |
79 | ||
80 | ||
81 | if (!UseSandboxing || Sandboxing == CUPSD_SANDBOXING_OFF) | |
b9faaae1 MS |
82 | { |
83 | /* | |
84 | * Only use sandbox profiles as root... | |
85 | */ | |
86 | ||
8fe0183a | 87 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d, allow_networking=%d) = NULL", job_id, allow_networking); |
b9faaae1 MS |
88 | |
89 | return (NULL); | |
90 | } | |
91 | ||
a4924f6c MS |
92 | if ((fp = cupsTempFile2(profile, sizeof(profile))) == NULL) |
93 | { | |
8fe0183a | 94 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d, allow_networking=%d) = NULL", job_id, allow_networking); |
a4924f6c MS |
95 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create security profile: %s", |
96 | strerror(errno)); | |
97 | return (NULL); | |
98 | } | |
99 | ||
0268488e MS |
100 | fchown(cupsFileNumber(fp), RunUser, Group); |
101 | fchmod(cupsFileNumber(fp), 0640); | |
102 | ||
8fe0183a | 103 | cupsd_requote(bin, ServerBin, sizeof(bin)); |
a4924f6c MS |
104 | cupsd_requote(cache, CacheDir, sizeof(cache)); |
105 | cupsd_requote(request, RequestRoot, sizeof(request)); | |
106 | cupsd_requote(root, ServerRoot, sizeof(root)); | |
107 | cupsd_requote(temp, TempDir, sizeof(temp)); | |
108 | ||
88f9aafc MS |
109 | nodebug = LogLevel < CUPSD_LOG_DEBUG ? " (with no-log)" : ""; |
110 | ||
a4924f6c | 111 | cupsFilePuts(fp, "(version 1)\n"); |
8fe0183a MS |
112 | if (Sandboxing == CUPSD_SANDBOXING_STRICT) |
113 | cupsFilePuts(fp, "(deny default)\n"); | |
114 | else | |
115 | cupsFilePuts(fp, "(allow default)\n"); | |
116 | if (LogLevel >= CUPSD_LOG_DEBUG) | |
117 | cupsFilePuts(fp, "(debug deny)\n"); | |
118 | cupsFilePuts(fp, "(import \"system.sb\")\n"); | |
119 | cupsFilePuts(fp, "(system-network)\n"); | |
120 | cupsFilePuts(fp, "(allow mach-per-user-lookup)\n"); | |
121 | cupsFilePuts(fp, "(allow ipc-posix-sem)\n"); | |
122 | cupsFilePuts(fp, "(allow ipc-posix-shm)\n"); | |
123 | cupsFilePuts(fp, "(allow ipc-sysv-shm)\n"); | |
124 | cupsFilePuts(fp, "(allow mach-lookup)\n"); | |
0268488e | 125 | if (!RunUser) |
88f9aafc MS |
126 | cupsFilePrintf(fp, |
127 | "(deny file-write* file-read-data file-read-metadata\n" | |
128 | " (regex" | |
129 | " #\"^/Users$\"" | |
130 | " #\"^/Users/\"" | |
131 | ")%s)\n", nodebug); | |
a4924f6c MS |
132 | cupsFilePrintf(fp, |
133 | "(deny file-write*\n" | |
5a6b583a MS |
134 | " (regex" |
135 | " #\"^%s$\"" /* ServerRoot */ | |
136 | " #\"^%s/\"" /* ServerRoot/... */ | |
137 | " #\"^/private/etc$\"" | |
138 | " #\"^/private/etc/\"" | |
139 | " #\"^/usr/local/etc$\"" | |
140 | " #\"^/usr/local/etc/\"" | |
141 | " #\"^/Library$\"" | |
142 | " #\"^/Library/\"" | |
143 | " #\"^/System$\"" | |
144 | " #\"^/System/\"" | |
88f9aafc MS |
145 | ")%s)\n", |
146 | root, root, nodebug); | |
8fe0183a | 147 | /* Specifically allow applications to stat RequestRoot and some other system folders */ |
7cf5915e MS |
148 | cupsFilePrintf(fp, |
149 | "(allow file-read-metadata\n" | |
150 | " (regex" | |
8fe0183a MS |
151 | " #\"^/$\"" /* / */ |
152 | " #\"^/usr$\"" /* /usr */ | |
153 | " #\"^/Library$\"" /* /Library */ | |
154 | " #\"^/Library/Printers$\"" /* /Library/Printers */ | |
7cf5915e MS |
155 | " #\"^%s$\"" /* RequestRoot */ |
156 | "))\n", | |
157 | request); | |
8fe0183a | 158 | /* Read and write TempDir, CacheDir, and other common folders */ |
84465c7c MS |
159 | cupsFilePuts(fp, |
160 | "(allow file-write* file-read-data file-read-metadata\n" | |
161 | " (regex" | |
162 | " #\"^/private/var/db/\"" | |
163 | " #\"^/private/var/folders/\"" | |
164 | " #\"^/private/var/lib/\"" | |
165 | " #\"^/private/var/log/\"" | |
166 | " #\"^/private/var/mysql/\"" | |
167 | " #\"^/private/var/run/\"" | |
168 | " #\"^/private/var/spool/\"" | |
169 | " #\"^/Library/Application Support/\"" | |
170 | " #\"^/Library/Caches/\"" | |
171 | " #\"^/Library/Logs/\"" | |
172 | " #\"^/Library/Preferences/\"" | |
173 | " #\"^/Library/WebServer/\"" | |
174 | " #\"^/Users/Shared/\"" | |
175 | "))\n"); | |
176 | cupsFilePrintf(fp, | |
177 | "(deny file-write*\n" | |
178 | " (regex #\"^%s$\")%s)\n", | |
179 | request, nodebug); | |
180 | cupsFilePrintf(fp, | |
181 | "(deny file-write* file-read-data file-read-metadata\n" | |
182 | " (regex #\"^%s/\")%s)\n", | |
183 | request, nodebug); | |
a4924f6c MS |
184 | cupsFilePrintf(fp, |
185 | "(allow file-write* file-read-data file-read-metadata\n" | |
5a6b583a MS |
186 | " (regex" |
187 | " #\"^%s$\"" /* TempDir */ | |
188 | " #\"^%s/\"" /* TempDir/... */ | |
189 | " #\"^%s$\"" /* CacheDir */ | |
190 | " #\"^%s/\"" /* CacheDir/... */ | |
ed6e7faf | 191 | "))\n", |
8fe0183a MS |
192 | temp, temp, cache, cache); |
193 | /* Read common folders */ | |
88f9aafc | 194 | cupsFilePrintf(fp, |
8fe0183a | 195 | "(allow file-read-data file-read-metadata\n" |
8fe0183a | 196 | " (regex" |
bcc4b655 MS |
197 | " #\"^/AppleInternal$\"" |
198 | " #\"^/AppleInternal/\"" | |
8fe0183a MS |
199 | " #\"^/bin$\"" /* /bin */ |
200 | " #\"^/bin/\"" /* /bin/... */ | |
777e09f8 | 201 | " #\"^/private$\"" |
d9183105 MS |
202 | " #\"^/private/etc$\"" |
203 | " #\"^/private/etc/\"" | |
1d8db48d MS |
204 | " #\"^/private/tmp$\"" |
205 | " #\"^/private/tmp/\"" | |
777e09f8 MS |
206 | " #\"^/private/var$\"" |
207 | " #\"^/private/var/db$\"" | |
d9183105 | 208 | " #\"^/private/var/folders$\"" |
99328a65 MS |
209 | " #\"^/private/var/lib$\"" |
210 | " #\"^/private/var/log$\"" | |
211 | " #\"^/private/var/mysql$\"" | |
1d8db48d | 212 | " #\"^/private/var/run$\"" |
777e09f8 | 213 | " #\"^/private/var/spool$\"" |
8fe0183a MS |
214 | " #\"^/usr/bin$\"" /* /usr/bin */ |
215 | " #\"^/usr/bin/\"" /* /usr/bin/... */ | |
216 | " #\"^/usr/libexec/cups$\"" /* /usr/libexec/cups */ | |
217 | " #\"^/usr/libexec/cups/\"" /* /usr/libexec/cups/... */ | |
3f4342fa MS |
218 | " #\"^/usr/libexec/fax$\"" /* /usr/libexec/fax */ |
219 | " #\"^/usr/libexec/fax/\"" /* /usr/libexec/fax/... */ | |
8fe0183a MS |
220 | " #\"^/usr/sbin$\"" /* /usr/sbin */ |
221 | " #\"^/usr/sbin/\"" /* /usr/sbin/... */ | |
0e53e7d1 MS |
222 | " #\"^/Library/Application Support$\"" |
223 | " #\"^/Library/Application Support/\"" | |
8fe0183a | 224 | " #\"^/Library/Caches$\"" |
f79731e7 MS |
225 | " #\"^/Library/ColorSync$\"" |
226 | " #\"^/Library/ColorSync/Profiles$\"" | |
227 | " #\"^/Library/ColorSync/Profiles/\"" | |
8fe0183a MS |
228 | " #\"^/Library/Fonts$\"" |
229 | " #\"^/Library/Fonts/\"" | |
96964950 MS |
230 | " #\"^/Library/Frameworks$\"" |
231 | " #\"^/Library/Frameworks/\"" | |
777e09f8 MS |
232 | " #\"^/Library/Keychains$\"" |
233 | " #\"^/Library/Keychains/\"" | |
99328a65 | 234 | " #\"^/Library/Logs$\"" |
8fe0183a | 235 | " #\"^/Library/Printers$\"" |
777e09f8 | 236 | " #\"^/Library/Printers/\"" |
c4b264d4 MS |
237 | " #\"^/Library/Security$\"" |
238 | " #\"^/Library/Security/\"" | |
99328a65 | 239 | " #\"^/Library/WebServer$\"" |
f79731e7 MS |
240 | " #\"^/System/Library/ColorSync$\"" |
241 | " #\"^/System/Library/ColorSync/Profiles$\"" | |
242 | " #\"^/System/Library/ColorSync/Profiles/\"" | |
8fe0183a MS |
243 | " #\"^%s/Library$\"" /* RequestRoot/Library */ |
244 | " #\"^%s/Library/\"" /* RequestRoot/Library/... */ | |
245 | " #\"^%s$\"" /* ServerBin */ | |
246 | " #\"^%s/\"" /* ServerBin/... */ | |
247 | " #\"^%s$\"" /* ServerRoot */ | |
248 | " #\"^%s/\"" /* ServerRoot/... */ | |
249 | "))\n", | |
250 | request, request, bin, bin, root, root); | |
251 | if (Sandboxing == CUPSD_SANDBOXING_RELAXED) | |
252 | { | |
253 | /* Limited write access to /Library/Printers/... */ | |
254 | cupsFilePuts(fp, | |
255 | "(allow file-write*\n" | |
88f9aafc | 256 | " (regex" |
8fe0183a MS |
257 | " #\"^/Library/Printers/.*/\"" |
258 | "))\n"); | |
259 | cupsFilePrintf(fp, | |
260 | "(deny file-write*\n" | |
261 | " (regex" | |
262 | " #\"^/Library/Printers/PPDs$\"" | |
263 | " #\"^/Library/Printers/PPDs/\"" | |
264 | " #\"^/Library/Printers/PPD Plugins$\"" | |
265 | " #\"^/Library/Printers/PPD Plugins/\"" | |
266 | ")%s)\n", nodebug); | |
267 | } | |
a94fe6cf MS |
268 | /* Allow execution of child processes as long as the programs are not in a user directory */ |
269 | cupsFilePuts(fp, "(allow process*)\n"); | |
270 | cupsFilePuts(fp, "(deny process-exec (regex #\"^/Users/\"))\n"); | |
8fe0183a | 271 | if (RunUser && getenv("CUPS_TESTROOT")) |
e60ec91f | 272 | { |
8fe0183a MS |
273 | /* Allow source directory access in "make test" environment */ |
274 | char testroot[1024]; /* Root directory of test files */ | |
e60ec91f | 275 | |
8fe0183a MS |
276 | cupsd_requote(testroot, getenv("CUPS_TESTROOT"), sizeof(testroot)); |
277 | ||
278 | cupsFilePrintf(fp, | |
279 | "(allow file-write* file-read-data file-read-metadata\n" | |
280 | " (regex" | |
281 | " #\"^%s$\"" /* CUPS_TESTROOT */ | |
282 | " #\"^%s/\"" /* CUPS_TESTROOT/... */ | |
283 | "))\n", | |
284 | testroot, testroot); | |
285 | cupsFilePrintf(fp, | |
286 | "(allow process-exec\n" | |
287 | " (regex" | |
288 | " #\"^%s/\"" /* CUPS_TESTROOT/... */ | |
289 | "))\n", | |
290 | testroot); | |
291 | } | |
292 | if (job_id) | |
293 | { | |
294 | /* Allow job filters to read the current job files... */ | |
a4924f6c MS |
295 | cupsFilePrintf(fp, |
296 | "(allow file-read-data file-read-metadata\n" | |
5a757074 | 297 | " (regex #\"^%s/([ac]%05d|d%05d-[0-9][0-9][0-9])$\"))\n", |
5bd77a73 | 298 | request, job_id, job_id); |
e60ec91f MS |
299 | } |
300 | else | |
301 | { | |
8fe0183a | 302 | /* Allow email notifications from notifiers... */ |
e60ec91f MS |
303 | cupsFilePuts(fp, |
304 | "(allow process-exec\n" | |
305 | " (literal \"/usr/sbin/sendmail\")\n" | |
8fe0183a MS |
306 | " (with no-sandbox))\n"); |
307 | } | |
a94fe6cf MS |
308 | /* Allow access to Bluetooth, USB, and notify_post. */ |
309 | cupsFilePuts(fp, "(allow iokit*)\n"); | |
310 | cupsFilePuts(fp, "(allow distributed-notification-post)\n"); | |
777e09f8 | 311 | /* Allow outbound networking to local services */ |
8fe0183a | 312 | cupsFilePuts(fp, "(allow network-outbound" |
1d8db48d | 313 | "\n (regex #\"^/private/var/run/\" #\"^/private/tmp/\")"); |
8fe0183a MS |
314 | for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners); |
315 | lis; | |
316 | lis = (cupsd_listener_t *)cupsArrayNext(Listeners)) | |
317 | { | |
318 | if (httpAddrFamily(&(lis->address)) == AF_LOCAL) | |
319 | { | |
320 | httpAddrString(&(lis->address), domain, sizeof(domain)); | |
321 | cupsFilePrintf(fp, "\n (literal \"%s\")", domain); | |
322 | } | |
323 | } | |
324 | if (allow_networking) | |
325 | { | |
326 | /* Allow TCP and UDP networking off the machine... */ | |
327 | cupsFilePuts(fp, "\n (remote tcp))\n"); | |
4c6277cc | 328 | cupsFilePuts(fp, "(allow network-bind)\n"); /* for LPD resvport */ |
8fe0183a MS |
329 | cupsFilePuts(fp, "(allow network*\n" |
330 | " (local udp \"*:*\")\n" | |
331 | " (remote udp \"*:*\"))\n"); | |
bcc4b655 | 332 | |
fb3777cc | 333 | /* Also allow access to device files... */ |
e2685126 | 334 | cupsFilePuts(fp, "(allow file-write* file-read-data file-read-metadata file-ioctl\n" |
4c6277cc | 335 | " (regex #\"^/dev/\"))\n"); |
8fe0183a MS |
336 | } |
337 | else | |
338 | { | |
fb3777cc | 339 | /* Only allow SNMP (UDP) and LPD (TCP) off the machine... */ |
8fe0183a MS |
340 | cupsFilePuts(fp, ")\n"); |
341 | cupsFilePuts(fp, "(allow network-outbound\n" | |
fb3777cc MS |
342 | " (remote udp \"*:161\")" |
343 | " (remote tcp \"*:515\"))\n"); | |
8fe0183a MS |
344 | cupsFilePuts(fp, "(allow network-inbound\n" |
345 | " (local udp \"localhost:*\"))\n"); | |
e60ec91f | 346 | } |
a4924f6c MS |
347 | cupsFileClose(fp); |
348 | ||
8fe0183a | 349 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d,allow_networking=%d) = \"%s\"", job_id, allow_networking, profile); |
a4924f6c | 350 | return ((void *)strdup(profile)); |
b9faaae1 | 351 | |
a4924f6c | 352 | #else |
8fe0183a | 353 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d, allow_networking=%d) = NULL", job_id, allow_networking); |
a4924f6c MS |
354 | |
355 | return (NULL); | |
356 | #endif /* HAVE_SANDBOX_H */ | |
357 | } | |
358 | ||
359 | ||
360 | /* | |
361 | * 'cupsdDestroyProfile()' - Delete an execution profile. | |
362 | */ | |
363 | ||
364 | void | |
365 | cupsdDestroyProfile(void *profile) /* I - Profile */ | |
366 | { | |
b9faaae1 MS |
367 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdDeleteProfile(profile=\"%s\")", |
368 | profile ? (char *)profile : "(null)"); | |
369 | ||
a4924f6c MS |
370 | #ifdef HAVE_SANDBOX_H |
371 | if (profile) | |
372 | { | |
373 | unlink((char *)profile); | |
374 | free(profile); | |
375 | } | |
376 | #endif /* HAVE_SANDBOX_H */ | |
377 | } | |
e00b005a | 378 | |
379 | ||
ef416fc2 | 380 | /* |
381 | * 'cupsdEndProcess()' - End a process. | |
382 | */ | |
383 | ||
384 | int /* O - 0 on success, -1 on failure */ | |
385 | cupsdEndProcess(int pid, /* I - Process ID */ | |
386 | int force) /* I - Force child to die */ | |
387 | { | |
b9faaae1 MS |
388 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdEndProcess(pid=%d, force=%d)", pid, |
389 | force); | |
390 | ||
ef55b745 MS |
391 | if (!pid) |
392 | return (0); | |
88f9aafc MS |
393 | |
394 | if (!RunUser) | |
395 | { | |
396 | /* | |
397 | * When running as root, cupsd puts child processes in their own process | |
398 | * group. Using "-pid" sends a signal to all processes in the group. | |
399 | */ | |
400 | ||
401 | pid = -pid; | |
402 | } | |
403 | ||
404 | if (force) | |
ef416fc2 | 405 | return (kill(pid, SIGKILL)); |
406 | else | |
407 | return (kill(pid, SIGTERM)); | |
408 | } | |
409 | ||
410 | ||
e00b005a | 411 | /* |
412 | * 'cupsdFinishProcess()' - Finish a process and get its name. | |
413 | */ | |
414 | ||
415 | const char * /* O - Process name */ | |
07623986 MS |
416 | cupsdFinishProcess(int pid, /* I - Process ID */ |
417 | char *name, /* I - Name buffer */ | |
418 | size_t namelen, /* I - Size of name buffer */ | |
419 | int *job_id) /* O - Job ID pointer or NULL */ | |
e00b005a | 420 | { |
421 | cupsd_proc_t key, /* Search key */ | |
422 | *proc; /* Matching process */ | |
423 | ||
424 | ||
425 | key.pid = pid; | |
426 | ||
427 | if ((proc = (cupsd_proc_t *)cupsArrayFind(process_array, &key)) != NULL) | |
428 | { | |
b9faaae1 MS |
429 | if (job_id) |
430 | *job_id = proc->job_id; | |
431 | ||
e00b005a | 432 | strlcpy(name, proc->name, namelen); |
433 | cupsArrayRemove(process_array, proc); | |
434 | free(proc); | |
e00b005a | 435 | } |
436 | else | |
b9faaae1 MS |
437 | { |
438 | if (job_id) | |
439 | *job_id = 0; | |
440 | ||
441 | strlcpy(name, "unknown", namelen); | |
442 | } | |
443 | ||
07623986 | 444 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFinishProcess(pid=%d, name=%p, namelen=" CUPS_LLFMT ", job_id=%p(%d)) = \"%s\"", pid, name, CUPS_LLCAST namelen, job_id, job_id ? *job_id : 0, name); |
b9faaae1 MS |
445 | |
446 | return (name); | |
e00b005a | 447 | } |
448 | ||
449 | ||
ef416fc2 | 450 | /* |
451 | * 'cupsdStartProcess()' - Start a process. | |
452 | */ | |
453 | ||
454 | int /* O - Process ID or 0 */ | |
455 | cupsdStartProcess( | |
b9faaae1 MS |
456 | const char *command, /* I - Full path to command */ |
457 | char *argv[], /* I - Command-line arguments */ | |
458 | char *envp[], /* I - Environment */ | |
459 | int infd, /* I - Standard input file descriptor */ | |
460 | int outfd, /* I - Standard output file descriptor */ | |
461 | int errfd, /* I - Standard error file descriptor */ | |
462 | int backfd, /* I - Backchannel file descriptor */ | |
463 | int sidefd, /* I - Sidechannel file descriptor */ | |
464 | int root, /* I - Run as root? */ | |
465 | void *profile, /* I - Security profile to use */ | |
38e73f87 | 466 | cupsd_job_t *job, /* I - Job associated with process */ |
b9faaae1 | 467 | int *pid) /* O - Process ID */ |
ef416fc2 | 468 | { |
0268488e | 469 | int i; /* Looping var */ |
e60ec91f | 470 | const char *exec_path = command; /* Command to be exec'd */ |
28c194b0 | 471 | char *real_argv[110], /* Real command-line arguments */ |
0268488e | 472 | cups_exec[1024]; /* Path to "cups-exec" program */ |
7e86f2f6 | 473 | uid_t user; /* Command UID */ |
e00b005a | 474 | cupsd_proc_t *proc; /* New process record */ |
c82f05ea MS |
475 | #ifdef HAVE_POSIX_SPAWN |
476 | posix_spawn_file_actions_t actions; /* Spawn file actions */ | |
477 | posix_spawnattr_t attrs; /* Spawn attributes */ | |
478 | char user_str[16], /* User string */ | |
479 | group_str[16], /* Group string */ | |
480 | nice_str[16]; /* FilterNice string */ | |
07623986 | 481 | #elif defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) |
e00b005a | 482 | struct sigaction action; /* POSIX signal handler */ |
07623986 | 483 | #endif /* HAVE_POSIX_SPAWN */ |
e53920b9 | 484 | #if defined(__APPLE__) |
e00b005a | 485 | char processPath[1024], /* CFProcessPath environment variable */ |
486 | linkpath[1024]; /* Link path for symlinks... */ | |
487 | int linkbytes; /* Bytes for link path */ | |
e53920b9 | 488 | #endif /* __APPLE__ */ |
ef416fc2 | 489 | |
490 | ||
22c9029b MS |
491 | *pid = 0; |
492 | ||
0268488e MS |
493 | /* |
494 | * Figure out the UID for the child process... | |
495 | */ | |
496 | ||
bf3816c7 MS |
497 | if (RunUser) |
498 | user = RunUser; | |
499 | else if (root) | |
500 | user = 0; | |
501 | else | |
502 | user = User; | |
503 | ||
0268488e MS |
504 | /* |
505 | * Check the permissions of the command we are running... | |
506 | */ | |
507 | ||
22c9029b MS |
508 | if (_cupsFileCheck(command, _CUPS_FILE_CHECK_PROGRAM, !RunUser, |
509 | cupsdLogFCMessage, job ? job->printer : NULL)) | |
bf3816c7 | 510 | return (0); |
76cd9e37 | 511 | |
e53920b9 | 512 | #if defined(__APPLE__) |
513 | if (envp) | |
e00b005a | 514 | { |
515 | /* | |
f3c17241 MS |
516 | * Add special voodoo magic for OS X - this allows OS X programs to access |
517 | * their bundle resources properly... | |
e00b005a | 518 | */ |
519 | ||
e53920b9 | 520 | if ((linkbytes = readlink(command, linkpath, sizeof(linkpath) - 1)) > 0) |
521 | { | |
522 | /* | |
523 | * Yes, this is a symlink to the actual program, nul-terminate and | |
524 | * use it... | |
525 | */ | |
526 | ||
527 | linkpath[linkbytes] = '\0'; | |
e00b005a | 528 | |
e53920b9 | 529 | if (linkpath[0] == '/') |
530 | snprintf(processPath, sizeof(processPath), "CFProcessPath=%s", | |
531 | linkpath); | |
532 | else | |
533 | snprintf(processPath, sizeof(processPath), "CFProcessPath=%s/%s", | |
f7deaa1a | 534 | dirname((char *)command), linkpath); |
e53920b9 | 535 | } |
e00b005a | 536 | else |
e53920b9 | 537 | snprintf(processPath, sizeof(processPath), "CFProcessPath=%s", command); |
bd7854cb | 538 | |
e53920b9 | 539 | envp[0] = processPath; /* Replace <CFProcessPath> string */ |
540 | } | |
541 | #endif /* __APPLE__ */ | |
e00b005a | 542 | |
0268488e MS |
543 | /* |
544 | * Use helper program when we have a sandbox profile... | |
545 | */ | |
546 | ||
c82f05ea | 547 | #ifndef HAVE_POSIX_SPAWN |
0268488e | 548 | if (profile) |
c82f05ea | 549 | #endif /* !HAVE_POSIX_SPAWN */ |
0268488e MS |
550 | { |
551 | snprintf(cups_exec, sizeof(cups_exec), "%s/daemon/cups-exec", ServerBin); | |
8fe0183a | 552 | snprintf(user_str, sizeof(user_str), "%d", user); |
c82f05ea MS |
553 | snprintf(group_str, sizeof(group_str), "%d", Group); |
554 | snprintf(nice_str, sizeof(nice_str), "%d", FilterNice); | |
0268488e MS |
555 | |
556 | real_argv[0] = cups_exec; | |
28c194b0 MS |
557 | real_argv[1] = (char *)"-g"; |
558 | real_argv[2] = group_str; | |
559 | real_argv[3] = (char *)"-n"; | |
c82f05ea | 560 | real_argv[4] = nice_str; |
28c194b0 MS |
561 | real_argv[5] = (char *)"-u"; |
562 | real_argv[6] = user_str; | |
343276df | 563 | real_argv[7] = profile ? profile : "none"; |
28c194b0 | 564 | real_argv[8] = (char *)command; |
0268488e MS |
565 | |
566 | for (i = 0; | |
28c194b0 | 567 | i < (int)(sizeof(real_argv) / sizeof(real_argv[0]) - 10) && argv[i]; |
0268488e | 568 | i ++) |
28c194b0 | 569 | real_argv[i + 9] = argv[i]; |
0268488e | 570 | |
28c194b0 | 571 | real_argv[i + 9] = NULL; |
0268488e | 572 | |
e60ec91f MS |
573 | argv = real_argv; |
574 | exec_path = cups_exec; | |
0268488e MS |
575 | } |
576 | ||
c82f05ea MS |
577 | if (LogLevel == CUPSD_LOG_DEBUG2) |
578 | { | |
579 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Preparing to start \"%s\", arguments:", command); | |
580 | ||
581 | for (i = 0; argv[i]; i ++) | |
582 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: argv[%d] = \"%s\"", i, argv[i]); | |
583 | } | |
584 | ||
585 | #ifdef HAVE_POSIX_SPAWN | |
586 | /* | |
587 | * Setup attributes and file actions for the spawn... | |
588 | */ | |
589 | ||
590 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Setting spawn attributes."); | |
591 | posix_spawnattr_init(&attrs); | |
592 | posix_spawnattr_setflags(&attrs, POSIX_SPAWN_SETPGROUP | POSIX_SPAWN_SETSIGDEF); | |
593 | ||
594 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Setting file actions."); | |
595 | posix_spawn_file_actions_init(&actions); | |
596 | if (infd != 0) | |
597 | { | |
598 | if (infd < 0) | |
599 | posix_spawn_file_actions_addopen(&actions, 0, "/dev/null", O_WRONLY, 0); | |
600 | else | |
601 | posix_spawn_file_actions_adddup2(&actions, infd, 0); | |
602 | } | |
603 | ||
604 | if (outfd != 1) | |
605 | { | |
606 | if (outfd < 0) | |
607 | posix_spawn_file_actions_addopen(&actions, 1, "/dev/null", O_WRONLY, 0); | |
608 | else | |
609 | posix_spawn_file_actions_adddup2(&actions, outfd, 1); | |
610 | } | |
611 | ||
612 | if (errfd != 2) | |
613 | { | |
614 | if (errfd < 0) | |
615 | posix_spawn_file_actions_addopen(&actions, 2, "/dev/null", O_WRONLY, 0); | |
616 | else | |
617 | posix_spawn_file_actions_adddup2(&actions, errfd, 2); | |
618 | } | |
619 | ||
620 | if (backfd != 3 && backfd >= 0) | |
621 | posix_spawn_file_actions_adddup2(&actions, backfd, 3); | |
622 | ||
623 | if (sidefd != 4 && sidefd >= 0) | |
624 | posix_spawn_file_actions_adddup2(&actions, sidefd, 4); | |
625 | ||
626 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Calling posix_spawn."); | |
627 | ||
628 | if (posix_spawn(pid, exec_path, &actions, &attrs, argv, envp ? envp : environ)) | |
629 | { | |
630 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork %s - %s.", command, strerror(errno)); | |
631 | ||
632 | *pid = 0; | |
633 | } | |
634 | else | |
635 | cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: pid=%d", (int)*pid); | |
636 | ||
637 | posix_spawn_file_actions_destroy(&actions); | |
638 | posix_spawnattr_destroy(&attrs); | |
639 | ||
640 | #else | |
ef416fc2 | 641 | /* |
642 | * Block signals before forking... | |
643 | */ | |
644 | ||
645 | cupsdHoldSignals(); | |
646 | ||
647 | if ((*pid = fork()) == 0) | |
648 | { | |
649 | /* | |
88f9aafc MS |
650 | * Child process goes here; update stderr as needed... |
651 | */ | |
652 | ||
653 | if (errfd != 2) | |
654 | { | |
655 | if (errfd < 0) | |
656 | errfd = open("/dev/null", O_WRONLY); | |
657 | ||
658 | if (errfd != 2) | |
659 | { | |
660 | dup2(errfd, 2); | |
661 | close(errfd); | |
662 | } | |
663 | } | |
664 | ||
665 | /* | |
666 | * Put this process in its own process group so that we can kill any child | |
667 | * processes it creates. | |
668 | */ | |
669 | ||
c82f05ea | 670 | # ifdef HAVE_SETPGID |
88f9aafc MS |
671 | if (!RunUser && setpgid(0, 0)) |
672 | exit(errno + 100); | |
c82f05ea | 673 | # else |
88f9aafc MS |
674 | if (!RunUser && setpgrp()) |
675 | exit(errno + 100); | |
c82f05ea | 676 | # endif /* HAVE_SETPGID */ |
88f9aafc MS |
677 | |
678 | /* | |
679 | * Update the remaining file descriptors as needed... | |
ef416fc2 | 680 | */ |
681 | ||
682 | if (infd != 0) | |
683 | { | |
68b10830 MS |
684 | if (infd < 0) |
685 | infd = open("/dev/null", O_RDONLY); | |
686 | ||
687 | if (infd != 0) | |
688 | { | |
689 | dup2(infd, 0); | |
690 | close(infd); | |
691 | } | |
ef416fc2 | 692 | } |
68b10830 | 693 | |
ef416fc2 | 694 | if (outfd != 1) |
695 | { | |
68b10830 MS |
696 | if (outfd < 0) |
697 | outfd = open("/dev/null", O_WRONLY); | |
698 | ||
699 | if (outfd != 1) | |
700 | { | |
701 | dup2(outfd, 1); | |
702 | close(outfd); | |
703 | } | |
ef416fc2 | 704 | } |
68b10830 | 705 | |
68b10830 | 706 | if (backfd != 3 && backfd >= 0) |
ef416fc2 | 707 | { |
68b10830 MS |
708 | dup2(backfd, 3); |
709 | close(backfd); | |
ef416fc2 | 710 | fcntl(3, F_SETFL, O_NDELAY); |
711 | } | |
68b10830 MS |
712 | |
713 | if (sidefd != 4 && sidefd >= 0) | |
f7deaa1a | 714 | { |
68b10830 MS |
715 | dup2(sidefd, 4); |
716 | close(sidefd); | |
f7deaa1a | 717 | fcntl(4, F_SETFL, O_NDELAY); |
718 | } | |
ef416fc2 | 719 | |
720 | /* | |
721 | * Change the priority of the process based on the FilterNice setting. | |
5bd77a73 | 722 | * (this is not done for root processes...) |
ef416fc2 | 723 | */ |
724 | ||
725 | if (!root) | |
726 | nice(FilterNice); | |
727 | ||
728 | /* | |
88f9aafc | 729 | * Reset group membership to just the main one we belong to. |
ef416fc2 | 730 | */ |
731 | ||
88f9aafc MS |
732 | if (!RunUser && setgid(Group)) |
733 | exit(errno + 100); | |
ef416fc2 | 734 | |
88f9aafc MS |
735 | if (!RunUser && setgroups(1, &Group)) |
736 | exit(errno + 100); | |
ef416fc2 | 737 | |
88f9aafc MS |
738 | /* |
739 | * Change user to something "safe"... | |
740 | */ | |
41681883 | 741 | |
88f9aafc MS |
742 | if (!RunUser && user && setuid(user)) |
743 | exit(errno + 100); | |
ef416fc2 | 744 | |
745 | /* | |
746 | * Change umask to restrict permissions on created files... | |
747 | */ | |
748 | ||
749 | umask(077); | |
750 | ||
751 | /* | |
752 | * Unblock signals before doing the exec... | |
753 | */ | |
754 | ||
c82f05ea | 755 | # ifdef HAVE_SIGSET |
ef416fc2 | 756 | sigset(SIGTERM, SIG_DFL); |
757 | sigset(SIGCHLD, SIG_DFL); | |
ef55b745 | 758 | sigset(SIGPIPE, SIG_DFL); |
c82f05ea | 759 | # elif defined(HAVE_SIGACTION) |
ef416fc2 | 760 | memset(&action, 0, sizeof(action)); |
761 | ||
762 | sigemptyset(&action.sa_mask); | |
763 | action.sa_handler = SIG_DFL; | |
764 | ||
765 | sigaction(SIGTERM, &action, NULL); | |
766 | sigaction(SIGCHLD, &action, NULL); | |
ef55b745 | 767 | sigaction(SIGPIPE, &action, NULL); |
c82f05ea | 768 | # else |
ef416fc2 | 769 | signal(SIGTERM, SIG_DFL); |
770 | signal(SIGCHLD, SIG_DFL); | |
ef55b745 | 771 | signal(SIGPIPE, SIG_DFL); |
c82f05ea | 772 | # endif /* HAVE_SIGSET */ |
ef416fc2 | 773 | |
774 | cupsdReleaseSignals(); | |
775 | ||
776 | /* | |
0268488e MS |
777 | * Execute the command; if for some reason this doesn't work, log an error |
778 | * exit with a non-zero value... | |
ef416fc2 | 779 | */ |
780 | ||
781 | if (envp) | |
e60ec91f | 782 | execve(exec_path, argv, envp); |
ef416fc2 | 783 | else |
e60ec91f | 784 | execv(exec_path, argv); |
ef416fc2 | 785 | |
88f9aafc | 786 | exit(errno + 100); |
ef416fc2 | 787 | } |
788 | else if (*pid < 0) | |
789 | { | |
790 | /* | |
791 | * Error - couldn't fork a new process! | |
792 | */ | |
793 | ||
794 | cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork %s - %s.", command, | |
795 | strerror(errno)); | |
796 | ||
797 | *pid = 0; | |
798 | } | |
c82f05ea MS |
799 | |
800 | cupsdReleaseSignals(); | |
801 | #endif /* HAVE_POSIX_SPAWN */ | |
802 | ||
803 | if (*pid) | |
e00b005a | 804 | { |
805 | if (!process_array) | |
806 | process_array = cupsArrayNew((cups_array_func_t)compare_procs, NULL); | |
f3c17241 | 807 | |
e00b005a | 808 | if (process_array) |
809 | { | |
810 | if ((proc = calloc(1, sizeof(cupsd_proc_t) + strlen(command))) != NULL) | |
811 | { | |
b9faaae1 | 812 | proc->pid = *pid; |
38e73f87 | 813 | proc->job_id = job ? job->id : 0; |
e60ec91f | 814 | _cups_strcpy(proc->name, command); |
e00b005a | 815 | |
816 | cupsArrayAdd(process_array, proc); | |
817 | } | |
818 | } | |
819 | } | |
ef416fc2 | 820 | |
b9faaae1 MS |
821 | cupsdLogMessage(CUPSD_LOG_DEBUG2, |
822 | "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, " | |
823 | "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, " | |
38e73f87 | 824 | "profile=%p, job=%p(%d), pid=%p) = %d", |
b9faaae1 | 825 | command, argv, envp, infd, outfd, errfd, backfd, sidefd, |
38e73f87 | 826 | root, profile, job, job ? job->id : 0, pid, *pid); |
b9faaae1 | 827 | |
ef416fc2 | 828 | return (*pid); |
829 | } | |
830 | ||
831 | ||
832 | /* | |
e00b005a | 833 | * 'compare_procs()' - Compare two processes. |
834 | */ | |
835 | ||
836 | static int /* O - Result of comparison */ | |
837 | compare_procs(cupsd_proc_t *a, /* I - First process */ | |
838 | cupsd_proc_t *b) /* I - Second process */ | |
839 | { | |
840 | return (a->pid - b->pid); | |
841 | } | |
842 | ||
843 | ||
a4924f6c MS |
844 | #ifdef HAVE_SANDBOX_H |
845 | /* | |
846 | * 'cupsd_requote()' - Make a regular-expression version of a string. | |
847 | */ | |
848 | ||
849 | static char * /* O - Quoted string */ | |
850 | cupsd_requote(char *dst, /* I - Destination buffer */ | |
851 | const char *src, /* I - Source string */ | |
852 | size_t dstsize) /* I - Size of destination buffer */ | |
853 | { | |
854 | int ch; /* Current character */ | |
855 | char *dstptr, /* Current position in buffer */ | |
856 | *dstend; /* End of destination buffer */ | |
857 | ||
858 | ||
859 | dstptr = dst; | |
860 | dstend = dst + dstsize - 2; | |
861 | ||
862 | while (*src && dstptr < dstend) | |
863 | { | |
864 | ch = *src++; | |
865 | ||
cb7f98ee MS |
866 | if (ch == '/' && !*src) |
867 | break; /* Don't add trailing slash */ | |
868 | ||
a4924f6c MS |
869 | if (strchr(".?*()[]^$\\", ch)) |
870 | *dstptr++ = '\\'; | |
871 | ||
7e86f2f6 | 872 | *dstptr++ = (char)ch; |
a4924f6c MS |
873 | } |
874 | ||
875 | *dstptr = '\0'; | |
876 | ||
877 | return (dst); | |
878 | } | |
879 | #endif /* HAVE_SANDBOX_H */ | |
880 | ||
881 | ||
e00b005a | 882 | /* |
f2d18633 | 883 | * End of "$Id$". |
ef416fc2 | 884 | */ |