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Commit | Line | Data |
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20263082 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2011 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
20263082 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
20263082 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
20263082 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
4f5dd394 | 20 | #include <errno.h> |
20263082 | 21 | #include <string.h> |
4f5dd394 | 22 | #include <sys/mount.h> |
20263082 | 23 | #include <unistd.h> |
20263082 | 24 | |
b5efdb8a | 25 | #include "alloc-util.h" |
90558f31 | 26 | #include "bus-common-errors.h" |
cc377381 | 27 | #include "bus-error.h" |
4f5dd394 | 28 | #include "bus-util.h" |
66cdd0f2 | 29 | #include "clean-ipc.h" |
4f5dd394 LP |
30 | #include "conf-parser.h" |
31 | #include "escape.h" | |
3ffd4af2 | 32 | #include "fd-util.h" |
4f5dd394 | 33 | #include "fileio.h" |
6482f626 | 34 | #include "formats-util.h" |
f4f15635 | 35 | #include "fs-util.h" |
4f5dd394 | 36 | #include "hashmap.h" |
9e281beb | 37 | #include "label.h" |
3ffd4af2 | 38 | #include "logind-user.h" |
4f5dd394 | 39 | #include "mkdir.h" |
4349cd7c | 40 | #include "mount-util.h" |
6bedfcbb | 41 | #include "parse-util.h" |
4f5dd394 LP |
42 | #include "path-util.h" |
43 | #include "rm-rf.h" | |
44 | #include "smack-util.h" | |
45 | #include "special.h" | |
90558f31 | 46 | #include "stdio-util.h" |
8b43440b | 47 | #include "string-table.h" |
4f5dd394 | 48 | #include "unit-name.h" |
ee104e11 | 49 | #include "user-util.h" |
4f5dd394 | 50 | #include "util.h" |
20263082 | 51 | |
157f5057 DH |
52 | int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) { |
53 | _cleanup_(user_freep) User *u = NULL; | |
6230bf75 | 54 | char lu[DECIMAL_STR_MAX(uid_t) + 1]; |
6230bf75 | 55 | int r; |
20263082 | 56 | |
157f5057 | 57 | assert(out); |
20263082 LP |
58 | assert(m); |
59 | assert(name); | |
60 | ||
14c3baca | 61 | u = new0(User, 1); |
20263082 | 62 | if (!u) |
157f5057 DH |
63 | return -ENOMEM; |
64 | ||
65 | u->manager = m; | |
66 | u->uid = uid; | |
67 | u->gid = gid; | |
b690ef12 | 68 | xsprintf(lu, UID_FMT, uid); |
20263082 LP |
69 | |
70 | u->name = strdup(name); | |
9444b1f2 | 71 | if (!u->name) |
157f5057 | 72 | return -ENOMEM; |
20263082 | 73 | |
de0671ee | 74 | if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0) |
157f5057 | 75 | return -ENOMEM; |
20263082 | 76 | |
f9e4283d | 77 | if (asprintf(&u->runtime_path, "/run/user/"UID_FMT, uid) < 0) |
157f5057 | 78 | return -ENOMEM; |
f9e4283d | 79 | |
6230bf75 DH |
80 | r = slice_build_subslice(SPECIAL_USER_SLICE, lu, &u->slice); |
81 | if (r < 0) | |
157f5057 | 82 | return r; |
6230bf75 | 83 | |
b690ef12 DH |
84 | r = unit_name_build("user", lu, ".service", &u->service); |
85 | if (r < 0) | |
86 | return r; | |
87 | ||
157f5057 DH |
88 | r = hashmap_put(m->users, UID_TO_PTR(uid), u); |
89 | if (r < 0) | |
90 | return r; | |
20263082 | 91 | |
157f5057 DH |
92 | r = hashmap_put(m->user_units, u->slice, u); |
93 | if (r < 0) | |
94 | return r; | |
9444b1f2 | 95 | |
b690ef12 DH |
96 | r = hashmap_put(m->user_units, u->service, u); |
97 | if (r < 0) | |
98 | return r; | |
99 | ||
157f5057 DH |
100 | *out = u; |
101 | u = NULL; | |
102 | return 0; | |
20263082 LP |
103 | } |
104 | ||
157f5057 DH |
105 | User *user_free(User *u) { |
106 | if (!u) | |
107 | return NULL; | |
20263082 | 108 | |
14c3baca | 109 | if (u->in_gc_queue) |
71fda00f | 110 | LIST_REMOVE(gc_queue, u->manager->user_gc_queue, u); |
14c3baca | 111 | |
20263082 LP |
112 | while (u->sessions) |
113 | session_free(u->sessions); | |
114 | ||
157f5057 DH |
115 | if (u->service) |
116 | hashmap_remove_value(u->manager->user_units, u->service, u); | |
117 | ||
118 | if (u->slice) | |
119 | hashmap_remove_value(u->manager->user_units, u->slice, u); | |
fb6becb4 | 120 | |
157f5057 | 121 | hashmap_remove_value(u->manager->users, UID_TO_PTR(u->uid), u); |
6230bf75 | 122 | |
157f5057 DH |
123 | u->slice_job = mfree(u->slice_job); |
124 | u->service_job = mfree(u->service_job); | |
fb6becb4 | 125 | |
157f5057 DH |
126 | u->service = mfree(u->service); |
127 | u->slice = mfree(u->slice); | |
128 | u->runtime_path = mfree(u->runtime_path); | |
129 | u->state_file = mfree(u->state_file); | |
130 | u->name = mfree(u->name); | |
20263082 | 131 | |
157f5057 | 132 | return mfree(u); |
20263082 LP |
133 | } |
134 | ||
71161305 | 135 | static int user_save_internal(User *u) { |
9444b1f2 LP |
136 | _cleanup_free_ char *temp_path = NULL; |
137 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
138 | int r; |
139 | ||
140 | assert(u); | |
141 | assert(u->state_file); | |
142 | ||
d2e54fae | 143 | r = mkdir_safe_label("/run/systemd/users", 0755, 0, 0); |
20263082 | 144 | if (r < 0) |
dacd6cee | 145 | goto fail; |
20263082 | 146 | |
14c3baca LP |
147 | r = fopen_temporary(u->state_file, &f, &temp_path); |
148 | if (r < 0) | |
dacd6cee | 149 | goto fail; |
14c3baca LP |
150 | |
151 | fchmod(fileno(f), 0644); | |
20263082 LP |
152 | |
153 | fprintf(f, | |
14c3baca | 154 | "# This is private data. Do not parse.\n" |
20263082 LP |
155 | "NAME=%s\n" |
156 | "STATE=%s\n", | |
157 | u->name, | |
158 | user_state_to_string(user_get_state(u))); | |
159 | ||
f9e4283d | 160 | /* LEGACY: no-one reads RUNTIME= anymore, drop it at some point */ |
20263082 | 161 | if (u->runtime_path) |
9444b1f2 | 162 | fprintf(f, "RUNTIME=%s\n", u->runtime_path); |
20263082 | 163 | |
fb6becb4 LP |
164 | if (u->service_job) |
165 | fprintf(f, "SERVICE_JOB=%s\n", u->service_job); | |
9444b1f2 | 166 | |
fb6becb4 LP |
167 | if (u->slice_job) |
168 | fprintf(f, "SLICE_JOB=%s\n", u->slice_job); | |
20263082 LP |
169 | |
170 | if (u->display) | |
9444b1f2 LP |
171 | fprintf(f, "DISPLAY=%s\n", u->display->id); |
172 | ||
173 | if (dual_timestamp_is_set(&u->timestamp)) | |
20263082 | 174 | fprintf(f, |
90b2de37 ZJS |
175 | "REALTIME="USEC_FMT"\n" |
176 | "MONOTONIC="USEC_FMT"\n", | |
177 | u->timestamp.realtime, | |
178 | u->timestamp.monotonic); | |
20263082 | 179 | |
034a2a52 LP |
180 | if (u->sessions) { |
181 | Session *i; | |
9b958eff | 182 | bool first; |
034a2a52 LP |
183 | |
184 | fputs("SESSIONS=", f); | |
9b958eff | 185 | first = true; |
034a2a52 | 186 | LIST_FOREACH(sessions_by_user, i, u->sessions) { |
9b958eff LP |
187 | if (first) |
188 | first = false; | |
189 | else | |
190 | fputc(' ', f); | |
191 | ||
192 | fputs(i->id, f); | |
034a2a52 LP |
193 | } |
194 | ||
9b958eff LP |
195 | fputs("\nSEATS=", f); |
196 | first = true; | |
034a2a52 | 197 | LIST_FOREACH(sessions_by_user, i, u->sessions) { |
9b958eff LP |
198 | if (!i->seat) |
199 | continue; | |
200 | ||
201 | if (first) | |
202 | first = false; | |
203 | else | |
204 | fputc(' ', f); | |
205 | ||
206 | fputs(i->seat->id, f); | |
034a2a52 LP |
207 | } |
208 | ||
9b958eff LP |
209 | fputs("\nACTIVE_SESSIONS=", f); |
210 | first = true; | |
211 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
212 | if (!session_is_active(i)) | |
213 | continue; | |
214 | ||
215 | if (first) | |
216 | first = false; | |
217 | else | |
218 | fputc(' ', f); | |
219 | ||
220 | fputs(i->id, f); | |
221 | } | |
034a2a52 | 222 | |
2dc8f41a CG |
223 | fputs("\nONLINE_SESSIONS=", f); |
224 | first = true; | |
225 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
226 | if (session_get_state(i) == SESSION_CLOSING) | |
227 | continue; | |
228 | ||
229 | if (first) | |
230 | first = false; | |
231 | else | |
232 | fputc(' ', f); | |
233 | ||
234 | fputs(i->id, f); | |
235 | } | |
236 | ||
9b958eff LP |
237 | fputs("\nACTIVE_SEATS=", f); |
238 | first = true; | |
034a2a52 | 239 | LIST_FOREACH(sessions_by_user, i, u->sessions) { |
9b958eff LP |
240 | if (!session_is_active(i) || !i->seat) |
241 | continue; | |
242 | ||
243 | if (first) | |
244 | first = false; | |
245 | else | |
47acb2f1 CG |
246 | fputc(' ', f); |
247 | ||
248 | fputs(i->seat->id, f); | |
034a2a52 | 249 | } |
2dc8f41a CG |
250 | |
251 | fputs("\nONLINE_SEATS=", f); | |
252 | first = true; | |
253 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
254 | if (session_get_state(i) == SESSION_CLOSING || !i->seat) | |
255 | continue; | |
256 | ||
257 | if (first) | |
258 | first = false; | |
259 | else | |
260 | fputc(' ', f); | |
261 | ||
262 | fputs(i->seat->id, f); | |
263 | } | |
9b958eff | 264 | fputc('\n', f); |
034a2a52 LP |
265 | } |
266 | ||
dacd6cee LP |
267 | r = fflush_and_check(f); |
268 | if (r < 0) | |
269 | goto fail; | |
14c3baca | 270 | |
dacd6cee | 271 | if (rename(temp_path, u->state_file) < 0) { |
20263082 | 272 | r = -errno; |
dacd6cee | 273 | goto fail; |
20263082 LP |
274 | } |
275 | ||
dacd6cee LP |
276 | return 0; |
277 | ||
278 | fail: | |
279 | (void) unlink(u->state_file); | |
280 | ||
281 | if (temp_path) | |
282 | (void) unlink(temp_path); | |
14c3baca | 283 | |
dacd6cee | 284 | return log_error_errno(r, "Failed to save user data %s: %m", u->state_file); |
20263082 LP |
285 | } |
286 | ||
71161305 SM |
287 | int user_save(User *u) { |
288 | assert(u); | |
289 | ||
290 | if (!u->started) | |
291 | return 0; | |
292 | ||
293 | return user_save_internal (u); | |
294 | } | |
295 | ||
20263082 | 296 | int user_load(User *u) { |
9444b1f2 | 297 | _cleanup_free_ char *display = NULL, *realtime = NULL, *monotonic = NULL; |
98a28fef | 298 | Session *s = NULL; |
9444b1f2 | 299 | int r; |
20263082 LP |
300 | |
301 | assert(u); | |
302 | ||
a185c5aa | 303 | r = parse_env_file(u->state_file, NEWLINE, |
fb6becb4 | 304 | "SERVICE_JOB", &u->service_job, |
fb6becb4 LP |
305 | "SLICE_JOB", &u->slice_job, |
306 | "DISPLAY", &display, | |
307 | "REALTIME", &realtime, | |
308 | "MONOTONIC", &monotonic, | |
20263082 LP |
309 | NULL); |
310 | if (r < 0) { | |
20263082 LP |
311 | if (r == -ENOENT) |
312 | return 0; | |
313 | ||
da927ba9 | 314 | log_error_errno(r, "Failed to read %s: %m", u->state_file); |
20263082 LP |
315 | return r; |
316 | } | |
317 | ||
9444b1f2 | 318 | if (display) |
98a28fef | 319 | s = hashmap_get(u->manager->sessions, display); |
20263082 | 320 | |
4d6d6518 | 321 | if (s && s->display && display_is_local(s->display)) |
20263082 LP |
322 | u->display = s; |
323 | ||
b895a735 BR |
324 | if (realtime) |
325 | timestamp_deserialize(realtime, &u->timestamp.realtime); | |
326 | if (monotonic) | |
327 | timestamp_deserialize(monotonic, &u->timestamp.monotonic); | |
9444b1f2 | 328 | |
20263082 LP |
329 | return r; |
330 | } | |
331 | ||
332 | static int user_mkdir_runtime_path(User *u) { | |
20263082 LP |
333 | int r; |
334 | ||
335 | assert(u); | |
336 | ||
d2e54fae | 337 | r = mkdir_safe_label("/run/user", 0755, 0, 0); |
f647962d MS |
338 | if (r < 0) |
339 | return log_error_errno(r, "Failed to create /run/user: %m"); | |
20263082 | 340 | |
f9e4283d | 341 | if (path_is_mount_point(u->runtime_path, 0) <= 0) { |
1c231f56 LP |
342 | _cleanup_free_ char *t = NULL; |
343 | ||
f9e4283d | 344 | (void) mkdir_label(u->runtime_path, 0700); |
1c231f56 | 345 | |
6baa7db0 | 346 | if (mac_smack_use()) |
374738d5 LS |
347 | r = asprintf(&t, "mode=0700,smackfsroot=*,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size); |
348 | else | |
349 | r = asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size); | |
374738d5 | 350 | if (r < 0) { |
1c231f56 LP |
351 | r = log_oom(); |
352 | goto fail; | |
353 | } | |
354 | ||
f9e4283d | 355 | r = mount("tmpfs", u->runtime_path, "tmpfs", MS_NODEV|MS_NOSUID, t); |
1c231f56 | 356 | if (r < 0) { |
11c6476a | 357 | if (errno != EPERM) { |
f9e4283d | 358 | r = log_error_errno(errno, "Failed to mount per-user tmpfs directory %s: %m", u->runtime_path); |
11c6476a CS |
359 | goto fail; |
360 | } | |
361 | ||
362 | /* Lacking permissions, maybe | |
363 | * CAP_SYS_ADMIN-less container? In this case, | |
364 | * just use a normal directory. */ | |
365 | ||
f9e4283d | 366 | r = chmod_and_chown(u->runtime_path, 0700, u->uid, u->gid); |
11c6476a CS |
367 | if (r < 0) { |
368 | log_error_errno(r, "Failed to change runtime directory ownership and mode: %m"); | |
369 | goto fail; | |
370 | } | |
1c231f56 | 371 | } |
9e281beb | 372 | |
f9e4283d | 373 | r = label_fix(u->runtime_path, false, false); |
9e281beb | 374 | if (r < 0) |
f9e4283d | 375 | log_warning_errno(r, "Failed to fix label of '%s', ignoring: %m", u->runtime_path); |
20263082 LP |
376 | } |
377 | ||
20263082 | 378 | return 0; |
1c231f56 LP |
379 | |
380 | fail: | |
f9e4283d DH |
381 | /* Try to clean up, but ignore errors */ |
382 | (void) rmdir(u->runtime_path); | |
1c231f56 | 383 | return r; |
20263082 LP |
384 | } |
385 | ||
fb6becb4 | 386 | static int user_start_slice(User *u) { |
4afd3348 | 387 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
6230bf75 DH |
388 | const char *description; |
389 | char *job; | |
20263082 LP |
390 | int r; |
391 | ||
392 | assert(u); | |
393 | ||
6230bf75 DH |
394 | u->slice_job = mfree(u->slice_job); |
395 | description = strjoina("User Slice of ", u->name); | |
396 | ||
397 | r = manager_start_slice( | |
398 | u->manager, | |
399 | u->slice, | |
400 | description, | |
401 | "systemd-logind.service", | |
402 | "systemd-user-sessions.service", | |
403 | u->manager->user_tasks_max, | |
404 | &error, | |
405 | &job); | |
2adae5ac | 406 | if (r >= 0) |
6230bf75 | 407 | u->slice_job = job; |
2adae5ac ZJS |
408 | else if (!sd_bus_error_has_name(&error, BUS_ERROR_UNIT_EXISTS)) |
409 | /* we don't fail due to this, let's try to continue */ | |
410 | log_error_errno(r, "Failed to start user slice %s, ignoring: %s (%s)", | |
411 | u->slice, bus_error_message(&error, r), error.name); | |
20263082 | 412 | |
20263082 LP |
413 | return 0; |
414 | } | |
415 | ||
416 | static int user_start_service(User *u) { | |
4afd3348 | 417 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
fb6becb4 LP |
418 | char *job; |
419 | int r; | |
420 | ||
20263082 LP |
421 | assert(u); |
422 | ||
b690ef12 | 423 | u->service_job = mfree(u->service_job); |
fb6becb4 | 424 | |
b690ef12 DH |
425 | r = manager_start_unit( |
426 | u->manager, | |
427 | u->service, | |
428 | &error, | |
429 | &job); | |
430 | if (r < 0) { | |
431 | /* we don't fail due to this, let's try to continue */ | |
432 | log_error_errno(r, "Failed to start user service, ignoring: %s", bus_error_message(&error, r)); | |
433 | } else { | |
434 | u->service_job = job; | |
fb6becb4 LP |
435 | } |
436 | ||
20263082 LP |
437 | return 0; |
438 | } | |
439 | ||
440 | int user_start(User *u) { | |
441 | int r; | |
442 | ||
443 | assert(u); | |
444 | ||
a832ab6f | 445 | if (u->started && !u->stopping) |
9418f147 LP |
446 | return 0; |
447 | ||
a832ab6f DH |
448 | /* |
449 | * If u->stopping is set, the user is marked for removal and the slice | |
450 | * and service stop-jobs are queued. We have to clear that flag before | |
451 | * queing the start-jobs again. If they succeed, the user object can be | |
452 | * re-used just fine (pid1 takes care of job-ordering and proper | |
453 | * restart), but if they fail, we want to force another user_stop() so | |
454 | * possibly pending units are stopped. | |
455 | * Note that we don't clear u->started, as we have no clue what state | |
456 | * the user is in on failure here. Hence, we pretend the user is | |
457 | * running so it will be properly taken down by GC. However, we clearly | |
458 | * return an error from user_start() in that case, so no further | |
459 | * reference to the user is taken. | |
460 | */ | |
461 | u->stopping = false; | |
462 | ||
463 | if (!u->started) { | |
464 | log_debug("New user %s logged in.", u->name); | |
465 | ||
466 | /* Make XDG_RUNTIME_DIR */ | |
467 | r = user_mkdir_runtime_path(u); | |
468 | if (r < 0) | |
469 | return r; | |
470 | } | |
20263082 LP |
471 | |
472 | /* Create cgroup */ | |
fb6becb4 | 473 | r = user_start_slice(u); |
20263082 LP |
474 | if (r < 0) |
475 | return r; | |
476 | ||
71161305 SM |
477 | /* Save the user data so far, because pam_systemd will read the |
478 | * XDG_RUNTIME_DIR out of it while starting up systemd --user. | |
479 | * We need to do user_save_internal() because we have not | |
480 | * "officially" started yet. */ | |
481 | user_save_internal(u); | |
482 | ||
20263082 LP |
483 | /* Spawn user systemd */ |
484 | r = user_start_service(u); | |
485 | if (r < 0) | |
486 | return r; | |
487 | ||
a832ab6f DH |
488 | if (!u->started) { |
489 | if (!dual_timestamp_is_set(&u->timestamp)) | |
490 | dual_timestamp_get(&u->timestamp); | |
491 | user_send_signal(u, true); | |
492 | u->started = true; | |
493 | } | |
9418f147 | 494 | |
7f7bb946 LP |
495 | /* Save new user data */ |
496 | user_save(u); | |
497 | ||
20263082 LP |
498 | return 0; |
499 | } | |
500 | ||
fb6becb4 | 501 | static int user_stop_slice(User *u) { |
4afd3348 | 502 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
fb6becb4 LP |
503 | char *job; |
504 | int r; | |
20263082 | 505 | |
20263082 LP |
506 | assert(u); |
507 | ||
fb6becb4 LP |
508 | r = manager_stop_unit(u->manager, u->slice, &error, &job); |
509 | if (r < 0) { | |
cc377381 | 510 | log_error("Failed to stop user slice: %s", bus_error_message(&error, r)); |
fb6becb4 LP |
511 | return r; |
512 | } | |
ed18b08b | 513 | |
fb6becb4 LP |
514 | free(u->slice_job); |
515 | u->slice_job = job; | |
ed18b08b | 516 | |
fb6becb4 | 517 | return r; |
20263082 LP |
518 | } |
519 | ||
fb6becb4 | 520 | static int user_stop_service(User *u) { |
4afd3348 | 521 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
fb6becb4 | 522 | char *job; |
20263082 | 523 | int r; |
20263082 LP |
524 | |
525 | assert(u); | |
526 | ||
fb6becb4 LP |
527 | r = manager_stop_unit(u->manager, u->service, &error, &job); |
528 | if (r < 0) { | |
cc377381 | 529 | log_error("Failed to stop user service: %s", bus_error_message(&error, r)); |
fb6becb4 LP |
530 | return r; |
531 | } | |
20263082 | 532 | |
fb6becb4 LP |
533 | free(u->service_job); |
534 | u->service_job = job; | |
20263082 | 535 | |
fb6becb4 LP |
536 | return r; |
537 | } | |
20263082 | 538 | |
20263082 LP |
539 | static int user_remove_runtime_path(User *u) { |
540 | int r; | |
541 | ||
542 | assert(u); | |
543 | ||
c6878637 | 544 | r = rm_rf(u->runtime_path, 0); |
1c231f56 | 545 | if (r < 0) |
da927ba9 | 546 | log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path); |
1c231f56 | 547 | |
11c6476a CS |
548 | /* Ignore cases where the directory isn't mounted, as that's |
549 | * quite possible, if we lacked the permissions to mount | |
550 | * something */ | |
551 | r = umount2(u->runtime_path, MNT_DETACH); | |
552 | if (r < 0 && errno != EINVAL && errno != ENOENT) | |
56f64d95 | 553 | log_error_errno(errno, "Failed to unmount user runtime directory %s: %m", u->runtime_path); |
1c231f56 | 554 | |
c6878637 | 555 | r = rm_rf(u->runtime_path, REMOVE_ROOT); |
20263082 | 556 | if (r < 0) |
da927ba9 | 557 | log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path); |
20263082 | 558 | |
20263082 LP |
559 | return r; |
560 | } | |
561 | ||
9bb69af4 | 562 | int user_stop(User *u, bool force) { |
20263082 LP |
563 | Session *s; |
564 | int r = 0, k; | |
565 | assert(u); | |
566 | ||
b58b227a DH |
567 | /* Stop jobs have already been queued */ |
568 | if (u->stopping) { | |
569 | user_save(u); | |
570 | return r; | |
571 | } | |
572 | ||
20263082 | 573 | LIST_FOREACH(sessions_by_user, s, u->sessions) { |
9bb69af4 | 574 | k = session_stop(s, force); |
20263082 LP |
575 | if (k < 0) |
576 | r = k; | |
577 | } | |
578 | ||
579 | /* Kill systemd */ | |
580 | k = user_stop_service(u); | |
581 | if (k < 0) | |
582 | r = k; | |
583 | ||
584 | /* Kill cgroup */ | |
fb6becb4 | 585 | k = user_stop_slice(u); |
20263082 LP |
586 | if (k < 0) |
587 | r = k; | |
588 | ||
5f41d1f1 LP |
589 | u->stopping = true; |
590 | ||
405e0255 LP |
591 | user_save(u); |
592 | ||
593 | return r; | |
594 | } | |
595 | ||
596 | int user_finalize(User *u) { | |
597 | Session *s; | |
598 | int r = 0, k; | |
599 | ||
600 | assert(u); | |
601 | ||
602 | if (u->started) | |
603 | log_debug("User %s logged out.", u->name); | |
604 | ||
605 | LIST_FOREACH(sessions_by_user, s, u->sessions) { | |
606 | k = session_finalize(s); | |
607 | if (k < 0) | |
608 | r = k; | |
609 | } | |
610 | ||
20263082 LP |
611 | /* Kill XDG_RUNTIME_DIR */ |
612 | k = user_remove_runtime_path(u); | |
613 | if (k < 0) | |
614 | r = k; | |
615 | ||
66cdd0f2 LP |
616 | /* Clean SysV + POSIX IPC objects */ |
617 | if (u->manager->remove_ipc) { | |
618 | k = clean_ipc(u->uid); | |
619 | if (k < 0) | |
620 | r = k; | |
621 | } | |
622 | ||
d2f92cdf LP |
623 | unlink(u->state_file); |
624 | user_add_to_gc_queue(u); | |
625 | ||
405e0255 | 626 | if (u->started) { |
ed18b08b | 627 | user_send_signal(u, false); |
405e0255 LP |
628 | u->started = false; |
629 | } | |
9418f147 | 630 | |
20263082 LP |
631 | return r; |
632 | } | |
633 | ||
a185c5aa LP |
634 | int user_get_idle_hint(User *u, dual_timestamp *t) { |
635 | Session *s; | |
636 | bool idle_hint = true; | |
5cb14b37 | 637 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
638 | |
639 | assert(u); | |
640 | ||
641 | LIST_FOREACH(sessions_by_user, s, u->sessions) { | |
642 | dual_timestamp k; | |
643 | int ih; | |
644 | ||
645 | ih = session_get_idle_hint(s, &k); | |
646 | if (ih < 0) | |
647 | return ih; | |
648 | ||
649 | if (!ih) { | |
650 | if (!idle_hint) { | |
651 | if (k.monotonic < ts.monotonic) | |
652 | ts = k; | |
653 | } else { | |
654 | idle_hint = false; | |
655 | ts = k; | |
656 | } | |
657 | } else if (idle_hint) { | |
658 | ||
659 | if (k.monotonic > ts.monotonic) | |
660 | ts = k; | |
661 | } | |
662 | } | |
663 | ||
664 | if (t) | |
665 | *t = ts; | |
666 | ||
667 | return idle_hint; | |
668 | } | |
669 | ||
3a9f7a30 | 670 | int user_check_linger_file(User *u) { |
cc377381 LP |
671 | _cleanup_free_ char *cc = NULL; |
672 | char *p = NULL; | |
e96cd586 | 673 | |
cc377381 LP |
674 | cc = cescape(u->name); |
675 | if (!cc) | |
e96cd586 LP |
676 | return -ENOMEM; |
677 | ||
63c372cb | 678 | p = strjoina("/var/lib/systemd/linger/", cc); |
e96cd586 | 679 | |
cc377381 | 680 | return access(p, F_OK) >= 0; |
e96cd586 LP |
681 | } |
682 | ||
cc377381 | 683 | bool user_check_gc(User *u, bool drop_not_started) { |
20263082 LP |
684 | assert(u); |
685 | ||
4a4b033f | 686 | if (drop_not_started && !u->started) |
cc377381 | 687 | return false; |
932e3ee7 | 688 | |
20263082 | 689 | if (u->sessions) |
cc377381 | 690 | return true; |
20263082 | 691 | |
e96cd586 | 692 | if (user_check_linger_file(u) > 0) |
cc377381 | 693 | return true; |
20263082 | 694 | |
cc377381 LP |
695 | if (u->slice_job && manager_job_is_active(u->manager, u->slice_job)) |
696 | return true; | |
697 | ||
698 | if (u->service_job && manager_job_is_active(u->manager, u->service_job)) | |
699 | return true; | |
405e0255 | 700 | |
cc377381 | 701 | return false; |
20263082 LP |
702 | } |
703 | ||
14c3baca LP |
704 | void user_add_to_gc_queue(User *u) { |
705 | assert(u); | |
706 | ||
707 | if (u->in_gc_queue) | |
708 | return; | |
709 | ||
71fda00f | 710 | LIST_PREPEND(gc_queue, u->manager->user_gc_queue, u); |
14c3baca LP |
711 | u->in_gc_queue = true; |
712 | } | |
713 | ||
20263082 LP |
714 | UserState user_get_state(User *u) { |
715 | Session *i; | |
716 | ||
717 | assert(u); | |
718 | ||
5f41d1f1 LP |
719 | if (u->stopping) |
720 | return USER_CLOSING; | |
721 | ||
71161305 | 722 | if (!u->started || u->slice_job || u->service_job) |
405e0255 | 723 | return USER_OPENING; |
c9caad80 | 724 | |
5f41d1f1 LP |
725 | if (u->sessions) { |
726 | bool all_closing = true; | |
727 | ||
728 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
00555a2e DH |
729 | SessionState state; |
730 | ||
731 | state = session_get_state(i); | |
732 | if (state == SESSION_ACTIVE) | |
5f41d1f1 | 733 | return USER_ACTIVE; |
00555a2e | 734 | if (state != SESSION_CLOSING) |
5f41d1f1 LP |
735 | all_closing = false; |
736 | } | |
20263082 | 737 | |
c9caad80 | 738 | return all_closing ? USER_CLOSING : USER_ONLINE; |
5f41d1f1 | 739 | } |
e96cd586 LP |
740 | |
741 | if (user_check_linger_file(u) > 0) | |
742 | return USER_LINGERING; | |
743 | ||
744 | return USER_CLOSING; | |
20263082 LP |
745 | } |
746 | ||
de07ab16 | 747 | int user_kill(User *u, int signo) { |
de07ab16 LP |
748 | assert(u); |
749 | ||
fb6becb4 | 750 | return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL); |
de07ab16 LP |
751 | } |
752 | ||
cde40acc | 753 | static bool elect_display_filter(Session *s) { |
7ffeb45c PW |
754 | /* Return true if the session is a candidate for the user’s ‘primary |
755 | * session’ or ‘display’. */ | |
756 | assert(s); | |
757 | ||
758 | return (s->class == SESSION_USER && !s->stopping); | |
759 | } | |
760 | ||
cde40acc | 761 | static int elect_display_compare(Session *s1, Session *s2) { |
7ffeb45c PW |
762 | /* Indexed by SessionType. Lower numbers mean more preferred. */ |
763 | const int type_ranks[_SESSION_TYPE_MAX] = { | |
764 | [SESSION_UNSPECIFIED] = 0, | |
765 | [SESSION_TTY] = -2, | |
766 | [SESSION_X11] = -3, | |
767 | [SESSION_WAYLAND] = -3, | |
768 | [SESSION_MIR] = -3, | |
769 | [SESSION_WEB] = -1, | |
770 | }; | |
771 | ||
772 | /* Calculate the partial order relationship between s1 and s2, | |
773 | * returning < 0 if s1 is preferred as the user’s ‘primary session’, | |
774 | * 0 if s1 and s2 are equally preferred or incomparable, or > 0 if s2 | |
775 | * is preferred. | |
776 | * | |
777 | * s1 or s2 may be NULL. */ | |
b9460fdc RC |
778 | if (!s1 && !s2) |
779 | return 0; | |
780 | ||
7ffeb45c PW |
781 | if ((s1 == NULL) != (s2 == NULL)) |
782 | return (s1 == NULL) - (s2 == NULL); | |
783 | ||
784 | if (s1->stopping != s2->stopping) | |
785 | return s1->stopping - s2->stopping; | |
786 | ||
787 | if ((s1->class != SESSION_USER) != (s2->class != SESSION_USER)) | |
788 | return (s1->class != SESSION_USER) - (s2->class != SESSION_USER); | |
789 | ||
790 | if ((s1->type == _SESSION_TYPE_INVALID) != (s2->type == _SESSION_TYPE_INVALID)) | |
791 | return (s1->type == _SESSION_TYPE_INVALID) - (s2->type == _SESSION_TYPE_INVALID); | |
792 | ||
793 | if (s1->type != s2->type) | |
794 | return type_ranks[s1->type] - type_ranks[s2->type]; | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
952d3260 | 799 | void user_elect_display(User *u) { |
7ffeb45c | 800 | Session *s; |
952d3260 LP |
801 | |
802 | assert(u); | |
803 | ||
804 | /* This elects a primary session for each user, which we call | |
805 | * the "display". We try to keep the assignment stable, but we | |
806 | * "upgrade" to better choices. */ | |
7ffeb45c | 807 | log_debug("Electing new display for user %s", u->name); |
952d3260 LP |
808 | |
809 | LIST_FOREACH(sessions_by_user, s, u->sessions) { | |
7ffeb45c PW |
810 | if (!elect_display_filter(s)) { |
811 | log_debug("Ignoring session %s", s->id); | |
952d3260 | 812 | continue; |
7ffeb45c | 813 | } |
952d3260 | 814 | |
7ffeb45c PW |
815 | if (elect_display_compare(s, u->display) < 0) { |
816 | log_debug("Choosing session %s in preference to %s", s->id, u->display ? u->display->id : "-"); | |
817 | u->display = s; | |
818 | } | |
e9e74f28 | 819 | } |
952d3260 LP |
820 | } |
821 | ||
20263082 LP |
822 | static const char* const user_state_table[_USER_STATE_MAX] = { |
823 | [USER_OFFLINE] = "offline", | |
fb6becb4 | 824 | [USER_OPENING] = "opening", |
20263082 LP |
825 | [USER_LINGERING] = "lingering", |
826 | [USER_ONLINE] = "online", | |
e96cd586 LP |
827 | [USER_ACTIVE] = "active", |
828 | [USER_CLOSING] = "closing" | |
20263082 LP |
829 | }; |
830 | ||
831 | DEFINE_STRING_TABLE_LOOKUP(user_state, UserState); | |
1c231f56 LP |
832 | |
833 | int config_parse_tmpfs_size( | |
834 | const char* unit, | |
835 | const char *filename, | |
836 | unsigned line, | |
837 | const char *section, | |
838 | unsigned section_line, | |
839 | const char *lvalue, | |
840 | int ltype, | |
841 | const char *rvalue, | |
842 | void *data, | |
843 | void *userdata) { | |
844 | ||
845 | size_t *sz = data; | |
846 | const char *e; | |
847 | int r; | |
848 | ||
849 | assert(filename); | |
850 | assert(lvalue); | |
851 | assert(rvalue); | |
852 | assert(data); | |
853 | ||
854 | e = endswith(rvalue, "%"); | |
855 | if (e) { | |
856 | unsigned long ul; | |
857 | char *f; | |
858 | ||
859 | errno = 0; | |
860 | ul = strtoul(rvalue, &f, 10); | |
b3267152 | 861 | if (errno > 0 || f != e) { |
12ca818f | 862 | log_syntax(unit, LOG_ERR, filename, line, errno, "Failed to parse percentage value, ignoring: %s", rvalue); |
1c231f56 LP |
863 | return 0; |
864 | } | |
865 | ||
866 | if (ul <= 0 || ul >= 100) { | |
12ca818f | 867 | log_syntax(unit, LOG_ERR, filename, line, 0, "Percentage value out of range, ignoring: %s", rvalue); |
1c231f56 LP |
868 | return 0; |
869 | } | |
870 | ||
871 | *sz = PAGE_ALIGN((size_t) ((physical_memory() * (uint64_t) ul) / (uint64_t) 100)); | |
872 | } else { | |
59f448cf | 873 | uint64_t k; |
1c231f56 | 874 | |
59f448cf LP |
875 | r = parse_size(rvalue, 1024, &k); |
876 | if (r < 0 || (uint64_t) (size_t) k != k) { | |
12ca818f | 877 | log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue); |
1c231f56 LP |
878 | return 0; |
879 | } | |
880 | ||
59f448cf | 881 | *sz = PAGE_ALIGN((size_t) k); |
1c231f56 LP |
882 | } |
883 | ||
884 | return 0; | |
885 | } |