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5b12334d LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdlib.h> | |
23 | ||
24 | #include "util.h" | |
25 | #include "cgroup-util.h" | |
26 | #include "fileio.h" | |
27 | #include "audit.h" | |
28 | #include "bus-message.h" | |
29 | #include "bus-util.h" | |
30 | #include "time-util.h" | |
49b832c5 | 31 | #include "strv.h" |
5b12334d LP |
32 | #include "bus-creds.h" |
33 | ||
34 | enum { | |
35 | CAP_OFFSET_INHERITABLE = 0, | |
36 | CAP_OFFSET_PERMITTED = 1, | |
37 | CAP_OFFSET_EFFECTIVE = 2, | |
38 | CAP_OFFSET_BOUNDING = 3 | |
39 | }; | |
40 | ||
41 | void bus_creds_done(sd_bus_creds *c) { | |
42 | assert(c); | |
43 | ||
44 | /* For internal bus cred structures that are allocated by | |
45 | * something else */ | |
46 | ||
47 | free(c->session); | |
48 | free(c->unit); | |
49 | free(c->user_unit); | |
50 | free(c->slice); | |
51 | ||
49b832c5 | 52 | strv_free(c->cmdline_array); |
65dae17a | 53 | strv_free(c->well_known_names); |
5b12334d LP |
54 | } |
55 | ||
56 | _public_ sd_bus_creds *sd_bus_creds_ref(sd_bus_creds *c) { | |
57 | assert_return(c, NULL); | |
58 | ||
59 | if (c->allocated) { | |
60 | assert(c->n_ref > 0); | |
61 | c->n_ref++; | |
62 | } else { | |
63 | sd_bus_message *m; | |
64 | ||
65 | /* If this is an embedded creds structure, then | |
66 | * forward ref counting to the message */ | |
67 | m = container_of(c, sd_bus_message, creds); | |
68 | sd_bus_message_ref(m); | |
69 | } | |
70 | ||
71 | return c; | |
72 | } | |
73 | ||
74 | _public_ sd_bus_creds *sd_bus_creds_unref(sd_bus_creds *c) { | |
5b1bc83f LP |
75 | |
76 | if (!c) | |
77 | return NULL; | |
5b12334d LP |
78 | |
79 | if (c->allocated) { | |
80 | assert(c->n_ref > 0); | |
81 | c->n_ref--; | |
82 | ||
83 | if (c->n_ref == 0) { | |
84 | bus_creds_done(c); | |
85 | ||
86 | free(c->comm); | |
87 | free(c->tid_comm); | |
88 | free(c->exe); | |
89 | free(c->cmdline); | |
90 | free(c->cgroup); | |
91 | free(c->capability); | |
92 | free(c->label); | |
49b832c5 | 93 | free(c->unique_name); |
751bc6ac | 94 | free(c->cgroup_root); |
5b12334d LP |
95 | free(c); |
96 | } | |
97 | } else { | |
98 | sd_bus_message *m; | |
99 | ||
100 | m = container_of(c, sd_bus_message, creds); | |
101 | sd_bus_message_unref(m); | |
102 | } | |
103 | ||
104 | ||
105 | return NULL; | |
106 | } | |
107 | ||
108 | _public_ uint64_t sd_bus_creds_get_mask(sd_bus_creds *c) { | |
109 | assert_return(c, 0); | |
110 | ||
111 | return c->mask; | |
112 | } | |
113 | ||
114 | sd_bus_creds* bus_creds_new(void) { | |
115 | sd_bus_creds *c; | |
116 | ||
117 | c = new0(sd_bus_creds, 1); | |
118 | if (!c) | |
119 | return NULL; | |
120 | ||
121 | c->allocated = true; | |
122 | c->n_ref = 1; | |
123 | return c; | |
124 | } | |
125 | ||
126 | _public_ int sd_bus_creds_new_from_pid(pid_t pid, uint64_t mask, sd_bus_creds **ret) { | |
127 | sd_bus_creds *c; | |
128 | int r; | |
129 | ||
130 | assert_return(pid >= 0, -EINVAL); | |
95c4fe82 | 131 | assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP); |
5b12334d LP |
132 | assert_return(ret, -EINVAL); |
133 | ||
134 | if (pid == 0) | |
135 | pid = getpid(); | |
136 | ||
137 | c = bus_creds_new(); | |
138 | if (!c) | |
139 | return -ENOMEM; | |
140 | ||
141 | r = bus_creds_add_more(c, mask, pid, 0); | |
142 | if (r < 0) { | |
143 | free(c); | |
144 | return r; | |
145 | } | |
146 | ||
147 | /* Check if the process existed at all, in case we haven't | |
148 | * figured that out already */ | |
149 | if (kill(pid, 0) < 0 && errno == ESRCH) { | |
150 | sd_bus_creds_unref(c); | |
151 | return -ESRCH; | |
152 | } | |
153 | ||
154 | *ret = c; | |
155 | return 0; | |
156 | } | |
157 | ||
158 | _public_ int sd_bus_creds_get_uid(sd_bus_creds *c, uid_t *uid) { | |
159 | assert_return(c, -EINVAL); | |
160 | assert_return(uid, -EINVAL); | |
6a4abbc8 LP |
161 | |
162 | if (!(c->mask & SD_BUS_CREDS_UID)) | |
163 | return -ENODATA; | |
5b12334d LP |
164 | |
165 | *uid = c->uid; | |
166 | return 0; | |
167 | } | |
168 | ||
169 | _public_ int sd_bus_creds_get_gid(sd_bus_creds *c, gid_t *gid) { | |
170 | assert_return(c, -EINVAL); | |
171 | assert_return(gid, -EINVAL); | |
6a4abbc8 LP |
172 | |
173 | if (!(c->mask & SD_BUS_CREDS_UID)) | |
174 | return -ENODATA; | |
5b12334d LP |
175 | |
176 | *gid = c->gid; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | _public_ int sd_bus_creds_get_pid(sd_bus_creds *c, pid_t *pid) { | |
181 | assert_return(c, -EINVAL); | |
182 | assert_return(pid, -EINVAL); | |
6a4abbc8 LP |
183 | |
184 | if (!(c->mask & SD_BUS_CREDS_PID)) | |
185 | return -ENODATA; | |
5b12334d LP |
186 | |
187 | assert(c->pid > 0); | |
188 | *pid = c->pid; | |
189 | return 0; | |
190 | } | |
191 | ||
192 | _public_ int sd_bus_creds_get_tid(sd_bus_creds *c, pid_t *tid) { | |
193 | assert_return(c, -EINVAL); | |
194 | assert_return(tid, -EINVAL); | |
6a4abbc8 LP |
195 | |
196 | if (!(c->mask & SD_BUS_CREDS_TID)) | |
197 | return -ENODATA; | |
5b12334d LP |
198 | |
199 | assert(c->tid > 0); | |
200 | *tid = c->tid; | |
201 | return 0; | |
202 | } | |
203 | ||
204 | _public_ int sd_bus_creds_get_pid_starttime(sd_bus_creds *c, uint64_t *usec) { | |
205 | assert_return(c, -EINVAL); | |
206 | assert_return(usec, -EINVAL); | |
6a4abbc8 LP |
207 | |
208 | if (!(c->mask & SD_BUS_CREDS_PID_STARTTIME)) | |
209 | return -ENODATA; | |
5b12334d LP |
210 | |
211 | assert(c->pid_starttime > 0); | |
212 | *usec = c->pid_starttime; | |
213 | return 0; | |
214 | } | |
215 | ||
216 | _public_ int sd_bus_creds_get_selinux_context(sd_bus_creds *c, const char **ret) { | |
217 | assert_return(c, -EINVAL); | |
6a4abbc8 LP |
218 | |
219 | if (!(c->mask & SD_BUS_CREDS_SELINUX_CONTEXT)) | |
220 | return -ENODATA; | |
5b12334d LP |
221 | |
222 | assert(c->label); | |
223 | *ret = c->label; | |
224 | return 0; | |
225 | } | |
226 | ||
227 | _public_ int sd_bus_creds_get_comm(sd_bus_creds *c, const char **ret) { | |
228 | assert_return(c, -EINVAL); | |
229 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
230 | |
231 | if (!(c->mask & SD_BUS_CREDS_COMM)) | |
232 | return -ENODATA; | |
5b12334d LP |
233 | |
234 | assert(c->comm); | |
235 | *ret = c->comm; | |
236 | return 0; | |
237 | } | |
238 | ||
239 | _public_ int sd_bus_creds_get_tid_comm(sd_bus_creds *c, const char **ret) { | |
240 | assert_return(c, -EINVAL); | |
241 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
242 | |
243 | if (!(c->mask & SD_BUS_CREDS_TID_COMM)) | |
244 | return -ENODATA; | |
5b12334d LP |
245 | |
246 | assert(c->tid_comm); | |
247 | *ret = c->tid_comm; | |
248 | return 0; | |
249 | } | |
250 | ||
251 | _public_ int sd_bus_creds_get_exe(sd_bus_creds *c, const char **ret) { | |
252 | assert_return(c, -EINVAL); | |
253 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
254 | |
255 | if (!(c->mask & SD_BUS_CREDS_EXE)) | |
256 | return -ENODATA; | |
5b12334d LP |
257 | |
258 | assert(c->exe); | |
259 | *ret = c->exe; | |
260 | return 0; | |
261 | } | |
262 | ||
263 | _public_ int sd_bus_creds_get_cgroup(sd_bus_creds *c, const char **ret) { | |
264 | assert_return(c, -EINVAL); | |
265 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
266 | |
267 | if (!(c->mask & SD_BUS_CREDS_CGROUP)) | |
268 | return -ENODATA; | |
5b12334d LP |
269 | |
270 | assert(c->cgroup); | |
271 | *ret = c->cgroup; | |
272 | return 0; | |
273 | } | |
274 | ||
275 | _public_ int sd_bus_creds_get_unit(sd_bus_creds *c, const char **ret) { | |
276 | int r; | |
277 | ||
278 | assert_return(c, -EINVAL); | |
279 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
280 | |
281 | if (!(c->mask & SD_BUS_CREDS_UNIT)) | |
282 | return -ENODATA; | |
5b12334d LP |
283 | |
284 | assert(c->cgroup); | |
285 | ||
286 | if (!c->unit) { | |
751bc6ac LP |
287 | const char *shifted; |
288 | ||
289 | r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted); | |
290 | if (r < 0) | |
291 | return r; | |
292 | ||
293 | r = cg_path_get_unit(shifted, (char**) &c->unit); | |
5b12334d LP |
294 | if (r < 0) |
295 | return r; | |
296 | } | |
297 | ||
298 | *ret = c->unit; | |
299 | return 0; | |
300 | } | |
301 | ||
302 | _public_ int sd_bus_creds_get_user_unit(sd_bus_creds *c, const char **ret) { | |
303 | int r; | |
304 | ||
305 | assert_return(c, -EINVAL); | |
306 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
307 | |
308 | if (!(c->mask & SD_BUS_CREDS_USER_UNIT)) | |
309 | return -ENODATA; | |
5b12334d LP |
310 | |
311 | assert(c->cgroup); | |
312 | ||
313 | if (!c->user_unit) { | |
751bc6ac LP |
314 | const char *shifted; |
315 | ||
316 | r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted); | |
317 | if (r < 0) | |
318 | return r; | |
319 | ||
320 | r = cg_path_get_user_unit(shifted, (char**) &c->user_unit); | |
5b12334d LP |
321 | if (r < 0) |
322 | return r; | |
323 | } | |
324 | ||
325 | *ret = c->user_unit; | |
326 | return 0; | |
327 | } | |
328 | ||
329 | _public_ int sd_bus_creds_get_slice(sd_bus_creds *c, const char **ret) { | |
330 | int r; | |
331 | ||
332 | assert_return(c, -EINVAL); | |
333 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
334 | |
335 | if (!(c->mask & SD_BUS_CREDS_SLICE)) | |
336 | return -ENODATA; | |
5b12334d LP |
337 | |
338 | assert(c->cgroup); | |
339 | ||
340 | if (!c->slice) { | |
751bc6ac LP |
341 | const char *shifted; |
342 | ||
343 | r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted); | |
344 | if (r < 0) | |
345 | return r; | |
346 | ||
347 | r = cg_path_get_slice(shifted, (char**) &c->slice); | |
5b12334d LP |
348 | if (r < 0) |
349 | return r; | |
350 | } | |
351 | ||
352 | *ret = c->slice; | |
353 | return 0; | |
354 | } | |
355 | ||
356 | _public_ int sd_bus_creds_get_session(sd_bus_creds *c, const char **ret) { | |
357 | int r; | |
358 | ||
359 | assert_return(c, -EINVAL); | |
360 | assert_return(ret, -EINVAL); | |
6a4abbc8 LP |
361 | |
362 | if (!(c->mask & SD_BUS_CREDS_SESSION)) | |
363 | return -ENODATA; | |
5b12334d LP |
364 | |
365 | assert(c->cgroup); | |
366 | ||
367 | if (!c->session) { | |
751bc6ac LP |
368 | const char *shifted; |
369 | ||
370 | r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted); | |
371 | if (r < 0) | |
372 | return r; | |
373 | ||
374 | r = cg_path_get_session(shifted, (char**) &c->session); | |
5b12334d LP |
375 | if (r < 0) |
376 | return r; | |
377 | } | |
378 | ||
379 | *ret = c->session; | |
380 | return 0; | |
381 | } | |
382 | ||
383 | _public_ int sd_bus_creds_get_owner_uid(sd_bus_creds *c, uid_t *uid) { | |
751bc6ac LP |
384 | const char *shifted; |
385 | int r; | |
386 | ||
5b12334d LP |
387 | assert_return(c, -EINVAL); |
388 | assert_return(uid, -EINVAL); | |
6a4abbc8 LP |
389 | |
390 | if (!(c->mask & SD_BUS_CREDS_OWNER_UID)) | |
391 | return -ENODATA; | |
5b12334d LP |
392 | |
393 | assert(c->cgroup); | |
394 | ||
751bc6ac LP |
395 | r = cg_shift_path(c->cgroup, c->cgroup_root, &shifted); |
396 | if (r < 0) | |
397 | return r; | |
398 | ||
399 | return cg_path_get_owner_uid(shifted, uid); | |
5b12334d LP |
400 | } |
401 | ||
402 | _public_ int sd_bus_creds_get_cmdline(sd_bus_creds *c, char ***cmdline) { | |
5b12334d | 403 | assert_return(c, -EINVAL); |
6a4abbc8 LP |
404 | |
405 | if (!(c->mask & SD_BUS_CREDS_CMDLINE)) | |
406 | return -ENODATA; | |
5b12334d | 407 | |
689bd78d | 408 | assert_return(c->cmdline, -ESRCH); |
5b12334d LP |
409 | assert(c->cmdline); |
410 | ||
49b832c5 LP |
411 | if (!c->cmdline_array) { |
412 | c->cmdline_array = strv_parse_nulstr(c->cmdline, c->cmdline_size); | |
413 | if (!c->cmdline_array) | |
414 | return -ENOMEM; | |
5b12334d LP |
415 | } |
416 | ||
5b12334d | 417 | *cmdline = c->cmdline_array; |
5b12334d LP |
418 | return 0; |
419 | } | |
420 | ||
421 | _public_ int sd_bus_creds_get_audit_session_id(sd_bus_creds *c, uint32_t *sessionid) { | |
422 | assert_return(c, -EINVAL); | |
423 | assert_return(sessionid, -EINVAL); | |
6a4abbc8 LP |
424 | |
425 | if (!(c->mask & SD_BUS_CREDS_AUDIT_SESSION_ID)) | |
426 | return -ENODATA; | |
5b12334d LP |
427 | |
428 | *sessionid = c->audit_session_id; | |
429 | return 0; | |
430 | } | |
431 | ||
432 | _public_ int sd_bus_creds_get_audit_login_uid(sd_bus_creds *c, uid_t *uid) { | |
433 | assert_return(c, -EINVAL); | |
434 | assert_return(uid, -EINVAL); | |
6a4abbc8 LP |
435 | |
436 | if (!(c->mask & SD_BUS_CREDS_AUDIT_LOGIN_UID)) | |
437 | return -ENODATA; | |
5b12334d LP |
438 | |
439 | *uid = c->audit_login_uid; | |
440 | return 0; | |
441 | } | |
442 | ||
49b832c5 LP |
443 | _public_ int sd_bus_creds_get_unique_name(sd_bus_creds *c, const char **unique_name) { |
444 | assert_return(c, -EINVAL); | |
445 | assert_return(unique_name, -EINVAL); | |
6a4abbc8 LP |
446 | |
447 | if (!(c->mask & SD_BUS_CREDS_UNIQUE_NAME)) | |
448 | return -ENODATA; | |
49b832c5 LP |
449 | |
450 | *unique_name = c->unique_name; | |
451 | return 0; | |
452 | } | |
453 | ||
454 | _public_ int sd_bus_creds_get_well_known_names(sd_bus_creds *c, char ***well_known_names) { | |
455 | assert_return(c, -EINVAL); | |
456 | assert_return(well_known_names, -EINVAL); | |
6a4abbc8 LP |
457 | |
458 | if (!(c->mask & SD_BUS_CREDS_WELL_KNOWN_NAMES)) | |
459 | return -ENODATA; | |
49b832c5 | 460 | |
65dae17a | 461 | *well_known_names = c->well_known_names; |
49b832c5 LP |
462 | return 0; |
463 | } | |
464 | ||
5b12334d LP |
465 | static int has_cap(sd_bus_creds *c, unsigned offset, int capability) { |
466 | size_t sz; | |
467 | ||
468 | assert(c); | |
469 | assert(c->capability); | |
470 | ||
471 | sz = c->capability_size / 4; | |
472 | if ((size_t) capability >= sz*8) | |
473 | return 0; | |
474 | ||
475 | return !!(c->capability[offset * sz + (capability / 8)] & (1 << (capability % 8))); | |
476 | } | |
477 | ||
478 | _public_ int sd_bus_creds_has_effective_cap(sd_bus_creds *c, int capability) { | |
479 | assert_return(c, -EINVAL); | |
480 | assert_return(capability >= 0, -EINVAL); | |
6a4abbc8 LP |
481 | |
482 | if (!(c->mask & SD_BUS_CREDS_EFFECTIVE_CAPS)) | |
483 | return -ENODATA; | |
5b12334d LP |
484 | |
485 | return has_cap(c, CAP_OFFSET_EFFECTIVE, capability); | |
486 | } | |
487 | ||
488 | _public_ int sd_bus_creds_has_permitted_cap(sd_bus_creds *c, int capability) { | |
489 | assert_return(c, -EINVAL); | |
490 | assert_return(capability >= 0, -EINVAL); | |
6a4abbc8 LP |
491 | |
492 | if (!(c->mask & SD_BUS_CREDS_PERMITTED_CAPS)) | |
493 | return -ENODATA; | |
5b12334d LP |
494 | |
495 | return has_cap(c, CAP_OFFSET_PERMITTED, capability); | |
496 | } | |
497 | ||
498 | _public_ int sd_bus_creds_has_inheritable_cap(sd_bus_creds *c, int capability) { | |
499 | assert_return(c, -EINVAL); | |
500 | assert_return(capability >= 0, -EINVAL); | |
6a4abbc8 LP |
501 | |
502 | if (!(c->mask & SD_BUS_CREDS_INHERITABLE_CAPS)) | |
503 | return -ENODATA; | |
5b12334d LP |
504 | |
505 | return has_cap(c, CAP_OFFSET_INHERITABLE, capability); | |
506 | } | |
507 | ||
508 | _public_ int sd_bus_creds_has_bounding_cap(sd_bus_creds *c, int capability) { | |
509 | assert_return(c, -EINVAL); | |
510 | assert_return(capability >= 0, -EINVAL); | |
6a4abbc8 LP |
511 | |
512 | if (!(c->mask & SD_BUS_CREDS_BOUNDING_CAPS)) | |
513 | return -ENODATA; | |
5b12334d LP |
514 | |
515 | return has_cap(c, CAP_OFFSET_BOUNDING, capability); | |
516 | } | |
517 | ||
518 | static int parse_caps(sd_bus_creds *c, unsigned offset, const char *p) { | |
519 | size_t sz; | |
520 | unsigned i; | |
521 | ||
522 | assert(c); | |
523 | assert(p); | |
524 | ||
525 | p += strspn(p, WHITESPACE); | |
526 | ||
527 | sz = strlen(p); | |
528 | if (sz % 2 != 0) | |
529 | return -EINVAL; | |
530 | ||
531 | sz /= 2; | |
532 | if (!c->capability) { | |
533 | c->capability = new0(uint8_t, sz * 4); | |
534 | if (!c->capability) | |
535 | return -ENOMEM; | |
536 | ||
537 | c->capability_size = sz * 4; | |
538 | } | |
539 | ||
540 | for (i = 0; i < sz; i ++) { | |
541 | int x, y; | |
542 | ||
543 | x = unhexchar(p[i*2]); | |
544 | y = unhexchar(p[i*2+1]); | |
545 | ||
546 | if (x < 0 || y < 0) | |
547 | return -EINVAL; | |
548 | ||
549 | c->capability[offset * sz + (sz - i - 1)] = (uint8_t) x << 4 | (uint8_t) y; | |
550 | } | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | int bus_creds_add_more(sd_bus_creds *c, uint64_t mask, pid_t pid, pid_t tid) { | |
556 | uint64_t missing; | |
557 | int r; | |
558 | ||
559 | assert(c); | |
560 | assert(c->allocated); | |
561 | ||
562 | missing = mask & ~c->mask; | |
563 | if (missing == 0) | |
564 | return 0; | |
565 | ||
566 | /* Try to retrieve PID from creds if it wasn't passed to us */ | |
567 | if (pid <= 0 && (c->mask & SD_BUS_CREDS_PID)) | |
568 | pid = c->pid; | |
569 | ||
570 | if (tid <= 0 && (c->mask & SD_BUS_CREDS_TID)) | |
571 | tid = c->pid; | |
572 | ||
573 | /* Without pid we cannot do much... */ | |
574 | if (pid <= 0) | |
575 | return 0; | |
576 | ||
577 | if (missing & (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | | |
578 | SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_INHERITABLE_CAPS | | |
579 | SD_BUS_CREDS_PERMITTED_CAPS | SD_BUS_CREDS_BOUNDING_CAPS)) { | |
580 | ||
581 | _cleanup_fclose_ FILE *f = NULL; | |
582 | char line[LINE_MAX]; | |
583 | const char *p; | |
584 | ||
585 | p = procfs_file_alloca(pid, "status"); | |
586 | ||
587 | f = fopen(p, "re"); | |
588 | if (!f) | |
589 | return errno == ENOENT ? -ESRCH : -errno; | |
590 | ||
591 | FOREACH_LINE(line, f, return -errno) { | |
592 | truncate_nl(line); | |
593 | ||
594 | if (missing & SD_BUS_CREDS_UID) { | |
595 | p = startswith(line, "Uid:"); | |
596 | if (p) { | |
597 | unsigned long uid; | |
598 | ||
599 | p += strspn(p, WHITESPACE); | |
600 | if (sscanf(p, "%lu", &uid) != 1) | |
601 | return -EIO; | |
602 | ||
603 | c->uid = (uid_t) uid; | |
604 | c->mask |= SD_BUS_CREDS_UID; | |
605 | continue; | |
606 | } | |
607 | } | |
608 | ||
609 | if (missing & SD_BUS_CREDS_GID) { | |
610 | p = startswith(line, "Gid:"); | |
611 | if (p) { | |
612 | unsigned long gid; | |
613 | ||
614 | p += strspn(p, WHITESPACE); | |
615 | if (sscanf(p, "%lu", &gid) != 1) | |
616 | return -EIO; | |
617 | ||
618 | c->gid = (uid_t) gid; | |
619 | c->mask |= SD_BUS_CREDS_GID; | |
620 | continue; | |
621 | } | |
622 | } | |
623 | ||
624 | if (missing & SD_BUS_CREDS_EFFECTIVE_CAPS) { | |
625 | p = startswith(line, "CapEff:"); | |
626 | if (p) { | |
627 | r = parse_caps(c, CAP_OFFSET_EFFECTIVE, p); | |
628 | if (r < 0) | |
629 | return r; | |
630 | ||
631 | c->mask |= SD_BUS_CREDS_EFFECTIVE_CAPS; | |
632 | continue; | |
633 | } | |
634 | } | |
635 | ||
636 | if (missing & SD_BUS_CREDS_PERMITTED_CAPS) { | |
637 | p = startswith(line, "CapPrm:"); | |
638 | if (p) { | |
639 | r = parse_caps(c, CAP_OFFSET_PERMITTED, p); | |
640 | if (r < 0) | |
641 | return r; | |
642 | ||
643 | c->mask |= SD_BUS_CREDS_PERMITTED_CAPS; | |
644 | continue; | |
645 | } | |
646 | } | |
647 | ||
648 | if (missing & SD_BUS_CREDS_INHERITABLE_CAPS) { | |
649 | p = startswith(line, "CapInh:"); | |
650 | if (p) { | |
651 | r = parse_caps(c, CAP_OFFSET_INHERITABLE, p); | |
652 | if (r < 0) | |
653 | return r; | |
654 | ||
655 | c->mask |= SD_BUS_CREDS_INHERITABLE_CAPS; | |
656 | continue; | |
657 | } | |
658 | } | |
659 | ||
660 | if (missing & SD_BUS_CREDS_BOUNDING_CAPS) { | |
661 | p = startswith(line, "CapBnd:"); | |
662 | if (p) { | |
663 | r = parse_caps(c, CAP_OFFSET_BOUNDING, p); | |
664 | if (r < 0) | |
665 | return r; | |
666 | ||
667 | c->mask |= SD_BUS_CREDS_BOUNDING_CAPS; | |
668 | continue; | |
669 | } | |
670 | } | |
671 | } | |
672 | } | |
673 | ||
674 | if (missing & (SD_BUS_CREDS_PID_STARTTIME)) { | |
675 | unsigned long long st; | |
676 | ||
677 | r = get_starttime_of_pid(pid, &st); | |
678 | if (r < 0) | |
679 | return r; | |
680 | ||
681 | c->pid_starttime = ((usec_t) st * USEC_PER_SEC) / (usec_t) sysconf(_SC_CLK_TCK); | |
682 | c->mask |= SD_BUS_CREDS_PID_STARTTIME; | |
683 | } | |
684 | ||
685 | if (missing & SD_BUS_CREDS_SELINUX_CONTEXT) { | |
686 | const char *p; | |
687 | ||
688 | p = procfs_file_alloca(pid, "attr/current"); | |
689 | r = read_one_line_file(p, &c->label); | |
76037bae | 690 | if (r < 0 && r != -ENOENT && r != -EINVAL) |
5b12334d LP |
691 | return r; |
692 | else if (r >= 0) | |
693 | c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; | |
694 | } | |
695 | ||
696 | if (missing & SD_BUS_CREDS_COMM) { | |
697 | r = get_process_comm(pid, &c->comm); | |
4efbd13a | 698 | if (r < 0) |
5b12334d | 699 | return r; |
4efbd13a KS |
700 | |
701 | c->mask |= SD_BUS_CREDS_COMM; | |
5b12334d LP |
702 | } |
703 | ||
704 | if (missing & SD_BUS_CREDS_EXE) { | |
705 | r = get_process_exe(pid, &c->exe); | |
706 | if (r < 0) | |
707 | return r; | |
708 | ||
709 | c->mask |= SD_BUS_CREDS_EXE; | |
710 | } | |
711 | ||
712 | if (missing & SD_BUS_CREDS_CMDLINE) { | |
713 | const char *p; | |
714 | ||
715 | p = procfs_file_alloca(pid, "cmdline"); | |
49b832c5 | 716 | r = read_full_file(p, &c->cmdline, &c->cmdline_size); |
5b12334d LP |
717 | if (r < 0) |
718 | return r; | |
719 | ||
49b832c5 | 720 | if (c->cmdline_size == 0) { |
5b12334d LP |
721 | free(c->cmdline); |
722 | c->cmdline = NULL; | |
723 | } else | |
724 | c->mask |= SD_BUS_CREDS_CMDLINE; | |
725 | } | |
726 | ||
727 | if (tid > 0 && (missing & SD_BUS_CREDS_TID_COMM)) { | |
728 | _cleanup_free_ char *p = NULL; | |
729 | ||
730 | if (asprintf(&p, "/proc/%lu/task/%lu/comm", (unsigned long) pid, (unsigned long) tid) < 0) | |
731 | return -ENOMEM; | |
732 | ||
733 | r = read_one_line_file(p, &c->tid_comm); | |
4efbd13a | 734 | if (r < 0) |
5b12334d | 735 | return r == -ENOENT ? -ESRCH : r; |
4efbd13a KS |
736 | |
737 | c->mask |= SD_BUS_CREDS_TID_COMM; | |
5b12334d LP |
738 | } |
739 | ||
740 | if (missing & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID)) { | |
741 | ||
742 | r = cg_pid_get_path(NULL, pid, &c->cgroup); | |
4efbd13a | 743 | if (r < 0) |
5b12334d | 744 | return r; |
4efbd13a | 745 | |
751bc6ac LP |
746 | r = cg_get_root_path(&c->cgroup_root); |
747 | if (r < 0) | |
748 | return r; | |
749 | ||
4efbd13a | 750 | c->mask |= missing & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID); |
5b12334d LP |
751 | } |
752 | ||
753 | if (missing & SD_BUS_CREDS_AUDIT_SESSION_ID) { | |
754 | r = audit_session_from_pid(pid, &c->audit_session_id); | |
547708f5 | 755 | if (r < 0 && r != -ENOTSUP && r != -ENXIO && r != -ENOENT) |
5b12334d LP |
756 | return r; |
757 | else if (r >= 0) | |
758 | c->mask |= SD_BUS_CREDS_AUDIT_SESSION_ID; | |
759 | } | |
760 | ||
761 | if (missing & SD_BUS_CREDS_AUDIT_LOGIN_UID) { | |
762 | r = audit_loginuid_from_pid(pid, &c->audit_login_uid); | |
547708f5 | 763 | if (r < 0 && r != -ENOTSUP && r != -ENXIO && r != -ENOENT) |
5b12334d LP |
764 | return r; |
765 | else if (r >= 0) | |
766 | c->mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID; | |
767 | } | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
49b832c5 | 772 | int bus_creds_extend_by_pid(sd_bus_creds *c, uint64_t mask, sd_bus_creds **ret) { |
5b12334d LP |
773 | _cleanup_bus_creds_unref_ sd_bus_creds *n = NULL; |
774 | int r; | |
775 | ||
49b832c5 LP |
776 | assert(c); |
777 | assert(ret); | |
5b12334d LP |
778 | |
779 | if ((mask & ~c->mask) == 0) { | |
780 | /* There's already all data we need. */ | |
781 | ||
782 | *ret = sd_bus_creds_ref(c); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | n = bus_creds_new(); | |
787 | if (!n) | |
788 | return -ENOMEM; | |
789 | ||
790 | /* Copy the original data over */ | |
791 | ||
792 | if (c->mask & mask & SD_BUS_CREDS_UID) { | |
793 | n->uid = c->uid; | |
794 | n->mask |= SD_BUS_CREDS_UID; | |
795 | } | |
796 | ||
797 | if (c->mask & mask & SD_BUS_CREDS_GID) { | |
798 | n->gid = c->gid; | |
799 | n->mask |= SD_BUS_CREDS_GID; | |
800 | } | |
801 | ||
802 | if (c->mask & mask & SD_BUS_CREDS_PID) { | |
803 | n->pid = c->pid; | |
804 | n->mask |= SD_BUS_CREDS_PID; | |
805 | } | |
806 | ||
807 | if (c->mask & mask & SD_BUS_CREDS_TID) { | |
808 | n->tid = c->tid; | |
809 | n->mask |= SD_BUS_CREDS_TID; | |
810 | } | |
811 | ||
812 | if (c->mask & mask & SD_BUS_CREDS_PID_STARTTIME) { | |
813 | n->pid_starttime = c->pid_starttime; | |
814 | n->mask |= SD_BUS_CREDS_PID_STARTTIME; | |
815 | } | |
816 | ||
817 | if (c->mask & mask & SD_BUS_CREDS_COMM) { | |
818 | n->comm = strdup(c->comm); | |
819 | if (!n->comm) | |
820 | return -ENOMEM; | |
821 | ||
822 | n->mask |= SD_BUS_CREDS_COMM; | |
823 | } | |
824 | ||
825 | if (c->mask & mask & SD_BUS_CREDS_TID_COMM) { | |
826 | n->tid_comm = strdup(c->tid_comm); | |
827 | if (!n->tid_comm) | |
828 | return -ENOMEM; | |
829 | ||
830 | n->mask |= SD_BUS_CREDS_TID_COMM; | |
831 | } | |
832 | ||
833 | if (c->mask & mask & SD_BUS_CREDS_EXE) { | |
834 | n->exe = strdup(c->exe); | |
835 | if (!n->exe) | |
836 | return -ENOMEM; | |
837 | ||
838 | n->mask |= SD_BUS_CREDS_EXE; | |
839 | } | |
840 | ||
841 | if (c->mask & mask & SD_BUS_CREDS_CMDLINE) { | |
49b832c5 | 842 | n->cmdline = memdup(c->cmdline, c->cmdline_size); |
5b12334d LP |
843 | if (!n->cmdline) |
844 | return -ENOMEM; | |
845 | ||
49b832c5 | 846 | n->cmdline_size = c->cmdline_size; |
5b12334d LP |
847 | n->mask |= SD_BUS_CREDS_CMDLINE; |
848 | } | |
849 | ||
850 | if (c->mask & mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_OWNER_UID)) { | |
851 | n->cgroup = strdup(c->cgroup); | |
852 | if (!n->cgroup) | |
853 | return -ENOMEM; | |
854 | ||
751bc6ac LP |
855 | n->cgroup_root = strdup(c->cgroup_root); |
856 | if (!n->cgroup_root) | |
857 | return -ENOMEM; | |
858 | ||
5b12334d LP |
859 | n->mask |= mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_OWNER_UID); |
860 | } | |
861 | ||
862 | if (c->mask & mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS)) { | |
863 | n->capability = memdup(c->capability, c->capability_size); | |
864 | if (!n->capability) | |
865 | return -ENOMEM; | |
866 | ||
867 | n->capability_size = c->capability_size; | |
868 | n->mask |= c->mask & mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS); | |
869 | } | |
870 | ||
871 | if (c->mask & mask & SD_BUS_CREDS_AUDIT_SESSION_ID) { | |
872 | n->audit_session_id = c->audit_session_id; | |
873 | n->mask |= SD_BUS_CREDS_AUDIT_SESSION_ID; | |
874 | } | |
875 | ||
876 | if (c->mask & mask & SD_BUS_CREDS_AUDIT_LOGIN_UID) { | |
877 | n->audit_login_uid = c->audit_login_uid; | |
878 | n->mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID; | |
879 | } | |
880 | ||
49b832c5 LP |
881 | if (c->mask & mask & SD_BUS_CREDS_UNIQUE_NAME) { |
882 | n->unique_name = strdup(c->unique_name); | |
883 | if (!n->unique_name) | |
884 | return -ENOMEM; | |
885 | } | |
886 | ||
887 | if (c->mask & mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) { | |
65dae17a | 888 | n->well_known_names = strv_copy(c->well_known_names); |
49b832c5 LP |
889 | if (!n->well_known_names) |
890 | return -ENOMEM; | |
49b832c5 LP |
891 | } |
892 | ||
5b12334d LP |
893 | /* Get more data */ |
894 | ||
895 | r = bus_creds_add_more(n, mask, | |
896 | c->mask & SD_BUS_CREDS_PID ? c->pid : 0, | |
897 | c->mask & SD_BUS_CREDS_TID ? c->tid : 0); | |
898 | if (r < 0) | |
899 | return r; | |
900 | ||
901 | *ret = n; | |
902 | n = NULL; | |
903 | return 0; | |
904 | } |