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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
20263082 | 2 | |
4f5dd394 | 3 | #include <errno.h> |
20263082 LP |
4 | #include <string.h> |
5 | #include <unistd.h> | |
0d536673 | 6 | #include <stdio_ext.h> |
20263082 | 7 | |
b5efdb8a | 8 | #include "alloc-util.h" |
90558f31 | 9 | #include "bus-common-errors.h" |
cc377381 | 10 | #include "bus-error.h" |
4f5dd394 | 11 | #include "bus-util.h" |
f5058264 | 12 | #include "cgroup-util.h" |
66cdd0f2 | 13 | #include "clean-ipc.h" |
4f5dd394 | 14 | #include "escape.h" |
3ffd4af2 | 15 | #include "fd-util.h" |
4f5dd394 | 16 | #include "fileio.h" |
f97b34a6 | 17 | #include "format-util.h" |
f4f15635 | 18 | #include "fs-util.h" |
4f5dd394 | 19 | #include "hashmap.h" |
9e281beb | 20 | #include "label.h" |
3ffd4af2 | 21 | #include "logind-user.h" |
4f5dd394 | 22 | #include "mkdir.h" |
6bedfcbb | 23 | #include "parse-util.h" |
4f5dd394 LP |
24 | #include "path-util.h" |
25 | #include "rm-rf.h" | |
d68c645b | 26 | #include "serialize.h" |
4f5dd394 | 27 | #include "special.h" |
90558f31 | 28 | #include "stdio-util.h" |
8b43440b | 29 | #include "string-table.h" |
4e5b605a | 30 | #include "strv.h" |
e4de7287 | 31 | #include "tmpfile-util.h" |
4f5dd394 | 32 | #include "unit-name.h" |
ee104e11 | 33 | #include "user-util.h" |
4f5dd394 | 34 | #include "util.h" |
20263082 | 35 | |
d5ac9d06 LP |
36 | int user_new(User **ret, |
37 | Manager *m, | |
38 | uid_t uid, | |
39 | gid_t gid, | |
40 | const char *name, | |
41 | const char *home) { | |
42 | ||
157f5057 | 43 | _cleanup_(user_freep) User *u = NULL; |
6230bf75 | 44 | char lu[DECIMAL_STR_MAX(uid_t) + 1]; |
6230bf75 | 45 | int r; |
20263082 | 46 | |
8c29a457 | 47 | assert(ret); |
20263082 LP |
48 | assert(m); |
49 | assert(name); | |
50 | ||
8c29a457 | 51 | u = new(User, 1); |
20263082 | 52 | if (!u) |
157f5057 DH |
53 | return -ENOMEM; |
54 | ||
8c29a457 LP |
55 | *u = (User) { |
56 | .manager = m, | |
57 | .uid = uid, | |
58 | .gid = gid, | |
9afe9efb | 59 | .last_session_timestamp = USEC_INFINITY, |
8c29a457 | 60 | }; |
20263082 LP |
61 | |
62 | u->name = strdup(name); | |
9444b1f2 | 63 | if (!u->name) |
157f5057 | 64 | return -ENOMEM; |
20263082 | 65 | |
d5ac9d06 LP |
66 | u->home = strdup(home); |
67 | if (!u->home) | |
68 | return -ENOMEM; | |
69 | ||
de0671ee | 70 | if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0) |
157f5057 | 71 | return -ENOMEM; |
20263082 | 72 | |
f9e4283d | 73 | if (asprintf(&u->runtime_path, "/run/user/"UID_FMT, uid) < 0) |
157f5057 | 74 | return -ENOMEM; |
f9e4283d | 75 | |
8c29a457 | 76 | xsprintf(lu, UID_FMT, uid); |
6230bf75 DH |
77 | r = slice_build_subslice(SPECIAL_USER_SLICE, lu, &u->slice); |
78 | if (r < 0) | |
157f5057 | 79 | return r; |
6230bf75 | 80 | |
b690ef12 DH |
81 | r = unit_name_build("user", lu, ".service", &u->service); |
82 | if (r < 0) | |
83 | return r; | |
84 | ||
25a1ab4e LP |
85 | r = unit_name_build("user-runtime-dir", lu, ".service", &u->runtime_dir_service); |
86 | if (r < 0) | |
87 | return r; | |
88 | ||
157f5057 DH |
89 | r = hashmap_put(m->users, UID_TO_PTR(uid), u); |
90 | if (r < 0) | |
91 | return r; | |
20263082 | 92 | |
157f5057 DH |
93 | r = hashmap_put(m->user_units, u->slice, u); |
94 | if (r < 0) | |
95 | return r; | |
9444b1f2 | 96 | |
b690ef12 DH |
97 | r = hashmap_put(m->user_units, u->service, u); |
98 | if (r < 0) | |
99 | return r; | |
100 | ||
25a1ab4e LP |
101 | r = hashmap_put(m->user_units, u->runtime_dir_service, u); |
102 | if (r < 0) | |
103 | return r; | |
104 | ||
8c29a457 | 105 | *ret = TAKE_PTR(u); |
157f5057 | 106 | return 0; |
20263082 LP |
107 | } |
108 | ||
157f5057 DH |
109 | User *user_free(User *u) { |
110 | if (!u) | |
111 | return NULL; | |
20263082 | 112 | |
14c3baca | 113 | if (u->in_gc_queue) |
71fda00f | 114 | LIST_REMOVE(gc_queue, u->manager->user_gc_queue, u); |
14c3baca | 115 | |
20263082 LP |
116 | while (u->sessions) |
117 | session_free(u->sessions); | |
118 | ||
157f5057 DH |
119 | if (u->service) |
120 | hashmap_remove_value(u->manager->user_units, u->service, u); | |
121 | ||
25a1ab4e LP |
122 | if (u->runtime_dir_service) |
123 | hashmap_remove_value(u->manager->user_units, u->runtime_dir_service, u); | |
124 | ||
157f5057 DH |
125 | if (u->slice) |
126 | hashmap_remove_value(u->manager->user_units, u->slice, u); | |
fb6becb4 | 127 | |
157f5057 | 128 | hashmap_remove_value(u->manager->users, UID_TO_PTR(u->uid), u); |
6230bf75 | 129 | |
9afe9efb LP |
130 | (void) sd_event_source_unref(u->timer_event_source); |
131 | ||
157f5057 | 132 | u->service_job = mfree(u->service_job); |
fb6becb4 | 133 | |
157f5057 | 134 | u->service = mfree(u->service); |
25a1ab4e | 135 | u->runtime_dir_service = mfree(u->runtime_dir_service); |
157f5057 DH |
136 | u->slice = mfree(u->slice); |
137 | u->runtime_path = mfree(u->runtime_path); | |
138 | u->state_file = mfree(u->state_file); | |
139 | u->name = mfree(u->name); | |
d5ac9d06 | 140 | u->home = mfree(u->home); |
20263082 | 141 | |
157f5057 | 142 | return mfree(u); |
20263082 LP |
143 | } |
144 | ||
71161305 | 145 | static int user_save_internal(User *u) { |
9444b1f2 LP |
146 | _cleanup_free_ char *temp_path = NULL; |
147 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
148 | int r; |
149 | ||
150 | assert(u); | |
151 | assert(u->state_file); | |
152 | ||
37c1d5e9 | 153 | r = mkdir_safe_label("/run/systemd/users", 0755, 0, 0, MKDIR_WARN_MODE); |
20263082 | 154 | if (r < 0) |
dacd6cee | 155 | goto fail; |
20263082 | 156 | |
14c3baca LP |
157 | r = fopen_temporary(u->state_file, &f, &temp_path); |
158 | if (r < 0) | |
dacd6cee | 159 | goto fail; |
14c3baca | 160 | |
0d536673 LP |
161 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
162 | (void) fchmod(fileno(f), 0644); | |
20263082 LP |
163 | |
164 | fprintf(f, | |
14c3baca | 165 | "# This is private data. Do not parse.\n" |
20263082 | 166 | "NAME=%s\n" |
d865bc02 LP |
167 | "STATE=%s\n" /* friendly user-facing state */ |
168 | "STOPPING=%s\n", /* low-level state */ | |
20263082 | 169 | u->name, |
d865bc02 LP |
170 | user_state_to_string(user_get_state(u)), |
171 | yes_no(u->stopping)); | |
20263082 | 172 | |
f9e4283d | 173 | /* LEGACY: no-one reads RUNTIME= anymore, drop it at some point */ |
20263082 | 174 | if (u->runtime_path) |
9444b1f2 | 175 | fprintf(f, "RUNTIME=%s\n", u->runtime_path); |
20263082 | 176 | |
fb6becb4 LP |
177 | if (u->service_job) |
178 | fprintf(f, "SERVICE_JOB=%s\n", u->service_job); | |
9444b1f2 | 179 | |
20263082 | 180 | if (u->display) |
9444b1f2 LP |
181 | fprintf(f, "DISPLAY=%s\n", u->display->id); |
182 | ||
183 | if (dual_timestamp_is_set(&u->timestamp)) | |
20263082 | 184 | fprintf(f, |
90b2de37 ZJS |
185 | "REALTIME="USEC_FMT"\n" |
186 | "MONOTONIC="USEC_FMT"\n", | |
187 | u->timestamp.realtime, | |
188 | u->timestamp.monotonic); | |
20263082 | 189 | |
9afe9efb LP |
190 | if (u->last_session_timestamp != USEC_INFINITY) |
191 | fprintf(f, "LAST_SESSION_TIMESTAMP=" USEC_FMT "\n", | |
192 | u->last_session_timestamp); | |
193 | ||
034a2a52 LP |
194 | if (u->sessions) { |
195 | Session *i; | |
9b958eff | 196 | bool first; |
034a2a52 | 197 | |
0d536673 | 198 | fputs("SESSIONS=", f); |
9b958eff | 199 | first = true; |
034a2a52 | 200 | LIST_FOREACH(sessions_by_user, i, u->sessions) { |
9b958eff LP |
201 | if (first) |
202 | first = false; | |
203 | else | |
0d536673 | 204 | fputc(' ', f); |
9b958eff | 205 | |
0d536673 | 206 | fputs(i->id, f); |
034a2a52 LP |
207 | } |
208 | ||
0d536673 | 209 | fputs("\nSEATS=", f); |
9b958eff | 210 | first = true; |
034a2a52 | 211 | LIST_FOREACH(sessions_by_user, i, u->sessions) { |
9b958eff LP |
212 | if (!i->seat) |
213 | continue; | |
214 | ||
215 | if (first) | |
216 | first = false; | |
217 | else | |
0d536673 | 218 | fputc(' ', f); |
9b958eff | 219 | |
0d536673 | 220 | fputs(i->seat->id, f); |
034a2a52 LP |
221 | } |
222 | ||
0d536673 | 223 | fputs("\nACTIVE_SESSIONS=", f); |
9b958eff LP |
224 | first = true; |
225 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
226 | if (!session_is_active(i)) | |
227 | continue; | |
228 | ||
229 | if (first) | |
230 | first = false; | |
231 | else | |
0d536673 | 232 | fputc(' ', f); |
9b958eff | 233 | |
0d536673 | 234 | fputs(i->id, f); |
9b958eff | 235 | } |
034a2a52 | 236 | |
0d536673 | 237 | fputs("\nONLINE_SESSIONS=", f); |
2dc8f41a CG |
238 | first = true; |
239 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
240 | if (session_get_state(i) == SESSION_CLOSING) | |
241 | continue; | |
242 | ||
243 | if (first) | |
244 | first = false; | |
245 | else | |
0d536673 | 246 | fputc(' ', f); |
2dc8f41a | 247 | |
0d536673 | 248 | fputs(i->id, f); |
2dc8f41a CG |
249 | } |
250 | ||
0d536673 | 251 | fputs("\nACTIVE_SEATS=", f); |
9b958eff | 252 | first = true; |
034a2a52 | 253 | LIST_FOREACH(sessions_by_user, i, u->sessions) { |
9b958eff LP |
254 | if (!session_is_active(i) || !i->seat) |
255 | continue; | |
256 | ||
257 | if (first) | |
258 | first = false; | |
259 | else | |
0d536673 | 260 | fputc(' ', f); |
47acb2f1 | 261 | |
0d536673 | 262 | fputs(i->seat->id, f); |
034a2a52 | 263 | } |
2dc8f41a | 264 | |
0d536673 | 265 | fputs("\nONLINE_SEATS=", f); |
2dc8f41a CG |
266 | first = true; |
267 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
268 | if (session_get_state(i) == SESSION_CLOSING || !i->seat) | |
269 | continue; | |
270 | ||
271 | if (first) | |
272 | first = false; | |
273 | else | |
0d536673 | 274 | fputc(' ', f); |
2dc8f41a | 275 | |
0d536673 | 276 | fputs(i->seat->id, f); |
2dc8f41a | 277 | } |
0d536673 | 278 | fputc('\n', f); |
034a2a52 LP |
279 | } |
280 | ||
dacd6cee LP |
281 | r = fflush_and_check(f); |
282 | if (r < 0) | |
283 | goto fail; | |
14c3baca | 284 | |
dacd6cee | 285 | if (rename(temp_path, u->state_file) < 0) { |
20263082 | 286 | r = -errno; |
dacd6cee | 287 | goto fail; |
20263082 LP |
288 | } |
289 | ||
dacd6cee LP |
290 | return 0; |
291 | ||
292 | fail: | |
293 | (void) unlink(u->state_file); | |
294 | ||
295 | if (temp_path) | |
296 | (void) unlink(temp_path); | |
14c3baca | 297 | |
dacd6cee | 298 | return log_error_errno(r, "Failed to save user data %s: %m", u->state_file); |
20263082 LP |
299 | } |
300 | ||
71161305 SM |
301 | int user_save(User *u) { |
302 | assert(u); | |
303 | ||
304 | if (!u->started) | |
305 | return 0; | |
306 | ||
8c29a457 | 307 | return user_save_internal(u); |
71161305 SM |
308 | } |
309 | ||
20263082 | 310 | int user_load(User *u) { |
9afe9efb | 311 | _cleanup_free_ char *realtime = NULL, *monotonic = NULL, *stopping = NULL, *last_session_timestamp = NULL; |
9444b1f2 | 312 | int r; |
20263082 LP |
313 | |
314 | assert(u); | |
315 | ||
aa8fbc74 | 316 | r = parse_env_file(NULL, u->state_file, |
9afe9efb LP |
317 | "SERVICE_JOB", &u->service_job, |
318 | "STOPPING", &stopping, | |
319 | "REALTIME", &realtime, | |
320 | "MONOTONIC", &monotonic, | |
13df9c39 | 321 | "LAST_SESSION_TIMESTAMP", &last_session_timestamp); |
1c8280fd LP |
322 | if (r == -ENOENT) |
323 | return 0; | |
324 | if (r < 0) | |
d710aaf7 | 325 | return log_error_errno(r, "Failed to read %s: %m", u->state_file); |
20263082 | 326 | |
d865bc02 LP |
327 | if (stopping) { |
328 | r = parse_boolean(stopping); | |
329 | if (r < 0) | |
330 | log_debug_errno(r, "Failed to parse 'STOPPING' boolean: %s", stopping); | |
331 | else | |
332 | u->stopping = r; | |
333 | } | |
334 | ||
b895a735 | 335 | if (realtime) |
d68c645b | 336 | (void) deserialize_usec(realtime, &u->timestamp.realtime); |
b895a735 | 337 | if (monotonic) |
d68c645b | 338 | (void) deserialize_usec(monotonic, &u->timestamp.monotonic); |
9afe9efb | 339 | if (last_session_timestamp) |
d68c645b | 340 | (void) deserialize_usec(last_session_timestamp, &u->last_session_timestamp); |
9444b1f2 | 341 | |
d865bc02 | 342 | return 0; |
20263082 LP |
343 | } |
344 | ||
25a1ab4e | 345 | static void user_start_service(User *u) { |
4afd3348 | 346 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
fb6becb4 LP |
347 | int r; |
348 | ||
20263082 LP |
349 | assert(u); |
350 | ||
25a1ab4e LP |
351 | /* Start the service containing the "systemd --user" instance (user@.service). Note that we don't explicitly |
352 | * start the per-user slice or the systemd-runtime-dir@.service instance, as those are pulled in both by | |
353 | * user@.service and the session scopes as dependencies. */ | |
354 | ||
b690ef12 | 355 | u->service_job = mfree(u->service_job); |
fb6becb4 | 356 | |
25a1ab4e | 357 | r = manager_start_unit(u->manager, u->service, &error, &u->service_job); |
545a30a9 | 358 | if (r < 0) |
25a1ab4e | 359 | log_warning_errno(r, "Failed to start user service '%s', ignoring: %s", u->service, bus_error_message(&error, r)); |
20263082 LP |
360 | } |
361 | ||
362 | int user_start(User *u) { | |
20263082 LP |
363 | assert(u); |
364 | ||
a832ab6f | 365 | if (u->started && !u->stopping) |
9418f147 LP |
366 | return 0; |
367 | ||
25a1ab4e LP |
368 | /* If u->stopping is set, the user is marked for removal and service stop-jobs are queued. We have to clear |
369 | * that flag before queing the start-jobs again. If they succeed, the user object can be re-used just fine | |
370 | * (pid1 takes care of job-ordering and proper restart), but if they fail, we want to force another user_stop() | |
371 | * so possibly pending units are stopped. */ | |
a832ab6f DH |
372 | u->stopping = false; |
373 | ||
a9f0f5e5 | 374 | if (!u->started) |
8b5c4d16 | 375 | log_debug("Starting services for new user %s.", u->name); |
a832ab6f | 376 | |
25a1ab4e LP |
377 | /* Save the user data so far, because pam_systemd will read the XDG_RUNTIME_DIR out of it while starting up |
378 | * systemd --user. We need to do user_save_internal() because we have not "officially" started yet. */ | |
71161305 SM |
379 | user_save_internal(u); |
380 | ||
25a1ab4e LP |
381 | /* Start user@UID.service */ |
382 | user_start_service(u); | |
20263082 | 383 | |
a832ab6f DH |
384 | if (!u->started) { |
385 | if (!dual_timestamp_is_set(&u->timestamp)) | |
386 | dual_timestamp_get(&u->timestamp); | |
387 | user_send_signal(u, true); | |
388 | u->started = true; | |
389 | } | |
9418f147 | 390 | |
7f7bb946 LP |
391 | /* Save new user data */ |
392 | user_save(u); | |
393 | ||
20263082 LP |
394 | return 0; |
395 | } | |
396 | ||
25a1ab4e | 397 | static void user_stop_service(User *u) { |
4afd3348 | 398 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
fb6becb4 | 399 | int r; |
20263082 | 400 | |
20263082 | 401 | assert(u); |
25a1ab4e | 402 | assert(u->service); |
20263082 | 403 | |
25a1ab4e LP |
404 | /* The reverse of user_start_service(). Note that we only stop user@UID.service here, and let StopWhenUnneeded= |
405 | * deal with the slice and the user-runtime-dir@.service instance. */ | |
20263082 | 406 | |
25a1ab4e | 407 | u->service_job = mfree(u->service_job); |
20263082 | 408 | |
25a1ab4e | 409 | r = manager_stop_unit(u->manager, u->service, &error, &u->service_job); |
fb2367ed | 410 | if (r < 0) |
25a1ab4e | 411 | log_warning_errno(r, "Failed to stop user service '%s', ignoring: %s", u->service, bus_error_message(&error, r)); |
fb6becb4 | 412 | } |
20263082 | 413 | |
9bb69af4 | 414 | int user_stop(User *u, bool force) { |
20263082 | 415 | Session *s; |
25a1ab4e | 416 | int r = 0; |
20263082 LP |
417 | assert(u); |
418 | ||
25a1ab4e LP |
419 | /* This is called whenever we begin with tearing down a user record. It's called in two cases: explicit API |
420 | * request to do so via the bus (in which case 'force' is true) and automatically due to GC, if there's no | |
421 | * session left pinning it (in which case 'force' is false). Note that this just initiates tearing down of the | |
422 | * user, the User object will remain in memory until user_finalize() is called, see below. */ | |
423 | ||
424 | if (!u->started) | |
425 | return 0; | |
426 | ||
427 | if (u->stopping) { /* Stop jobs have already been queued */ | |
b58b227a | 428 | user_save(u); |
25a1ab4e | 429 | return 0; |
b58b227a DH |
430 | } |
431 | ||
20263082 | 432 | LIST_FOREACH(sessions_by_user, s, u->sessions) { |
25a1ab4e LP |
433 | int k; |
434 | ||
9bb69af4 | 435 | k = session_stop(s, force); |
20263082 LP |
436 | if (k < 0) |
437 | r = k; | |
438 | } | |
439 | ||
25a1ab4e | 440 | user_stop_service(u); |
20263082 | 441 | |
5f41d1f1 LP |
442 | u->stopping = true; |
443 | ||
405e0255 LP |
444 | user_save(u); |
445 | ||
446 | return r; | |
447 | } | |
448 | ||
449 | int user_finalize(User *u) { | |
450 | Session *s; | |
451 | int r = 0, k; | |
452 | ||
453 | assert(u); | |
454 | ||
25a1ab4e LP |
455 | /* Called when the user is really ready to be freed, i.e. when all unit stop jobs and suchlike for it are |
456 | * done. This is called as a result of an earlier user_done() when all jobs are completed. */ | |
457 | ||
405e0255 LP |
458 | if (u->started) |
459 | log_debug("User %s logged out.", u->name); | |
460 | ||
461 | LIST_FOREACH(sessions_by_user, s, u->sessions) { | |
462 | k = session_finalize(s); | |
463 | if (k < 0) | |
464 | r = k; | |
465 | } | |
466 | ||
00d9ef85 LP |
467 | /* Clean SysV + POSIX IPC objects, but only if this is not a system user. Background: in many setups cronjobs |
468 | * are run in full PAM and thus logind sessions, even if the code run doesn't belong to actual users but to | |
469 | * system components. Since enable RemoveIPC= globally for all users, we need to be a bit careful with such | |
470 | * cases, as we shouldn't accidentally remove a system service's IPC objects while it is running, just because | |
471 | * a cronjob running as the same user just finished. Hence: exclude system users generally from IPC clean-up, | |
472 | * and do it only for normal users. */ | |
ece877d4 | 473 | if (u->manager->remove_ipc && !uid_is_system(u->uid)) { |
00d9ef85 | 474 | k = clean_ipc_by_uid(u->uid); |
66cdd0f2 LP |
475 | if (k < 0) |
476 | r = k; | |
477 | } | |
478 | ||
75bbdf47 | 479 | (void) unlink(u->state_file); |
d2f92cdf LP |
480 | user_add_to_gc_queue(u); |
481 | ||
405e0255 | 482 | if (u->started) { |
ed18b08b | 483 | user_send_signal(u, false); |
405e0255 LP |
484 | u->started = false; |
485 | } | |
9418f147 | 486 | |
20263082 LP |
487 | return r; |
488 | } | |
489 | ||
a185c5aa LP |
490 | int user_get_idle_hint(User *u, dual_timestamp *t) { |
491 | Session *s; | |
492 | bool idle_hint = true; | |
5cb14b37 | 493 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
494 | |
495 | assert(u); | |
496 | ||
497 | LIST_FOREACH(sessions_by_user, s, u->sessions) { | |
498 | dual_timestamp k; | |
499 | int ih; | |
500 | ||
501 | ih = session_get_idle_hint(s, &k); | |
502 | if (ih < 0) | |
503 | return ih; | |
504 | ||
505 | if (!ih) { | |
506 | if (!idle_hint) { | |
507 | if (k.monotonic < ts.monotonic) | |
508 | ts = k; | |
509 | } else { | |
510 | idle_hint = false; | |
511 | ts = k; | |
512 | } | |
513 | } else if (idle_hint) { | |
514 | ||
515 | if (k.monotonic > ts.monotonic) | |
516 | ts = k; | |
517 | } | |
518 | } | |
519 | ||
520 | if (t) | |
521 | *t = ts; | |
522 | ||
523 | return idle_hint; | |
524 | } | |
525 | ||
3a9f7a30 | 526 | int user_check_linger_file(User *u) { |
cc377381 LP |
527 | _cleanup_free_ char *cc = NULL; |
528 | char *p = NULL; | |
e96cd586 | 529 | |
cc377381 LP |
530 | cc = cescape(u->name); |
531 | if (!cc) | |
e96cd586 LP |
532 | return -ENOMEM; |
533 | ||
63c372cb | 534 | p = strjoina("/var/lib/systemd/linger/", cc); |
6996df9b LP |
535 | if (access(p, F_OK) < 0) { |
536 | if (errno != ENOENT) | |
537 | return -errno; | |
e96cd586 | 538 | |
6996df9b LP |
539 | return false; |
540 | } | |
541 | ||
542 | return true; | |
e96cd586 LP |
543 | } |
544 | ||
4e5b605a LP |
545 | static bool user_unit_active(User *u) { |
546 | const char *i; | |
547 | int r; | |
548 | ||
549 | assert(u->service); | |
550 | assert(u->runtime_dir_service); | |
551 | assert(u->slice); | |
552 | ||
553 | FOREACH_STRING(i, u->service, u->runtime_dir_service, u->slice) { | |
554 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
555 | ||
556 | r = manager_unit_is_active(u->manager, i, &error); | |
557 | if (r < 0) | |
558 | log_debug_errno(r, "Failed to determine whether unit '%s' is active, ignoring: %s", u->service, bus_error_message(&error, r)); | |
559 | if (r != 0) | |
560 | return true; | |
561 | } | |
562 | ||
563 | return false; | |
564 | } | |
565 | ||
5c093a23 | 566 | bool user_may_gc(User *u, bool drop_not_started) { |
bd26aee1 LP |
567 | int r; |
568 | ||
20263082 LP |
569 | assert(u); |
570 | ||
4a4b033f | 571 | if (drop_not_started && !u->started) |
5c093a23 | 572 | return true; |
932e3ee7 | 573 | |
20263082 | 574 | if (u->sessions) |
5c093a23 | 575 | return false; |
20263082 | 576 | |
9afe9efb LP |
577 | if (u->last_session_timestamp != USEC_INFINITY) { |
578 | /* All sessions have been closed. Let's see if we shall leave the user record around for a bit */ | |
579 | ||
580 | if (u->manager->user_stop_delay == USEC_INFINITY) | |
581 | return false; /* Leave it around forever! */ | |
582 | if (u->manager->user_stop_delay > 0 && | |
583 | now(CLOCK_MONOTONIC) < usec_add(u->last_session_timestamp, u->manager->user_stop_delay)) | |
584 | return false; /* Leave it around for a bit longer. */ | |
585 | } | |
586 | ||
4e5b605a LP |
587 | /* Is this a user that shall stay around forever ("linger")? Before we say "no" to GC'ing for lingering users, let's check |
588 | * if any of the three units that we maintain for this user is still around. If none of them is, | |
589 | * there's no need to keep this user around even if lingering is enabled. */ | |
590 | if (user_check_linger_file(u) > 0 && user_unit_active(u)) | |
5c093a23 | 591 | return false; |
20263082 | 592 | |
bd26aee1 LP |
593 | /* Check if our job is still pending */ |
594 | if (u->service_job) { | |
595 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
cc377381 | 596 | |
bd26aee1 LP |
597 | r = manager_job_is_active(u->manager, u->service_job, &error); |
598 | if (r < 0) | |
599 | log_debug_errno(r, "Failed to determine whether job '%s' is pending, ignoring: %s", u->service_job, bus_error_message(&error, r)); | |
600 | if (r != 0) | |
601 | return false; | |
602 | } | |
603 | ||
604 | /* Note that we don't care if the three units we manage for each user object are up or not, as we are managing | |
605 | * their state rather than tracking it. */ | |
405e0255 | 606 | |
5c093a23 | 607 | return true; |
20263082 LP |
608 | } |
609 | ||
14c3baca LP |
610 | void user_add_to_gc_queue(User *u) { |
611 | assert(u); | |
612 | ||
613 | if (u->in_gc_queue) | |
614 | return; | |
615 | ||
71fda00f | 616 | LIST_PREPEND(gc_queue, u->manager->user_gc_queue, u); |
14c3baca LP |
617 | u->in_gc_queue = true; |
618 | } | |
619 | ||
20263082 LP |
620 | UserState user_get_state(User *u) { |
621 | Session *i; | |
622 | ||
623 | assert(u); | |
624 | ||
5f41d1f1 LP |
625 | if (u->stopping) |
626 | return USER_CLOSING; | |
627 | ||
25a1ab4e | 628 | if (!u->started || u->service_job) |
405e0255 | 629 | return USER_OPENING; |
c9caad80 | 630 | |
5f41d1f1 LP |
631 | if (u->sessions) { |
632 | bool all_closing = true; | |
633 | ||
634 | LIST_FOREACH(sessions_by_user, i, u->sessions) { | |
00555a2e DH |
635 | SessionState state; |
636 | ||
637 | state = session_get_state(i); | |
638 | if (state == SESSION_ACTIVE) | |
5f41d1f1 | 639 | return USER_ACTIVE; |
00555a2e | 640 | if (state != SESSION_CLOSING) |
5f41d1f1 LP |
641 | all_closing = false; |
642 | } | |
20263082 | 643 | |
c9caad80 | 644 | return all_closing ? USER_CLOSING : USER_ONLINE; |
5f41d1f1 | 645 | } |
e96cd586 | 646 | |
4e5b605a | 647 | if (user_check_linger_file(u) > 0 && user_unit_active(u)) |
e96cd586 LP |
648 | return USER_LINGERING; |
649 | ||
650 | return USER_CLOSING; | |
20263082 LP |
651 | } |
652 | ||
de07ab16 | 653 | int user_kill(User *u, int signo) { |
de07ab16 LP |
654 | assert(u); |
655 | ||
fb6becb4 | 656 | return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL); |
de07ab16 LP |
657 | } |
658 | ||
cde40acc | 659 | static bool elect_display_filter(Session *s) { |
04857cd8 | 660 | /* Return true if the session is a candidate for the user’s ‘primary session’ or ‘display’. */ |
7ffeb45c PW |
661 | assert(s); |
662 | ||
04857cd8 | 663 | return s->class == SESSION_USER && s->started && !s->stopping; |
7ffeb45c PW |
664 | } |
665 | ||
cde40acc | 666 | static int elect_display_compare(Session *s1, Session *s2) { |
7ffeb45c PW |
667 | /* Indexed by SessionType. Lower numbers mean more preferred. */ |
668 | const int type_ranks[_SESSION_TYPE_MAX] = { | |
669 | [SESSION_UNSPECIFIED] = 0, | |
670 | [SESSION_TTY] = -2, | |
671 | [SESSION_X11] = -3, | |
672 | [SESSION_WAYLAND] = -3, | |
673 | [SESSION_MIR] = -3, | |
674 | [SESSION_WEB] = -1, | |
675 | }; | |
676 | ||
677 | /* Calculate the partial order relationship between s1 and s2, | |
678 | * returning < 0 if s1 is preferred as the user’s ‘primary session’, | |
679 | * 0 if s1 and s2 are equally preferred or incomparable, or > 0 if s2 | |
680 | * is preferred. | |
681 | * | |
682 | * s1 or s2 may be NULL. */ | |
b9460fdc RC |
683 | if (!s1 && !s2) |
684 | return 0; | |
685 | ||
7ffeb45c PW |
686 | if ((s1 == NULL) != (s2 == NULL)) |
687 | return (s1 == NULL) - (s2 == NULL); | |
688 | ||
689 | if (s1->stopping != s2->stopping) | |
690 | return s1->stopping - s2->stopping; | |
691 | ||
692 | if ((s1->class != SESSION_USER) != (s2->class != SESSION_USER)) | |
693 | return (s1->class != SESSION_USER) - (s2->class != SESSION_USER); | |
694 | ||
695 | if ((s1->type == _SESSION_TYPE_INVALID) != (s2->type == _SESSION_TYPE_INVALID)) | |
696 | return (s1->type == _SESSION_TYPE_INVALID) - (s2->type == _SESSION_TYPE_INVALID); | |
697 | ||
698 | if (s1->type != s2->type) | |
699 | return type_ranks[s1->type] - type_ranks[s2->type]; | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
952d3260 | 704 | void user_elect_display(User *u) { |
7ffeb45c | 705 | Session *s; |
952d3260 LP |
706 | |
707 | assert(u); | |
708 | ||
04857cd8 LP |
709 | /* This elects a primary session for each user, which we call the "display". We try to keep the assignment |
710 | * stable, but we "upgrade" to better choices. */ | |
7ffeb45c | 711 | log_debug("Electing new display for user %s", u->name); |
952d3260 LP |
712 | |
713 | LIST_FOREACH(sessions_by_user, s, u->sessions) { | |
7ffeb45c PW |
714 | if (!elect_display_filter(s)) { |
715 | log_debug("Ignoring session %s", s->id); | |
952d3260 | 716 | continue; |
7ffeb45c | 717 | } |
952d3260 | 718 | |
7ffeb45c PW |
719 | if (elect_display_compare(s, u->display) < 0) { |
720 | log_debug("Choosing session %s in preference to %s", s->id, u->display ? u->display->id : "-"); | |
721 | u->display = s; | |
722 | } | |
e9e74f28 | 723 | } |
952d3260 LP |
724 | } |
725 | ||
9afe9efb LP |
726 | static int user_stop_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
727 | User *u = userdata; | |
728 | ||
729 | assert(u); | |
730 | user_add_to_gc_queue(u); | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
735 | void user_update_last_session_timer(User *u) { | |
736 | int r; | |
737 | ||
738 | assert(u); | |
739 | ||
740 | if (u->sessions) { | |
741 | /* There are sessions, turn off the timer */ | |
742 | u->last_session_timestamp = USEC_INFINITY; | |
743 | u->timer_event_source = sd_event_source_unref(u->timer_event_source); | |
744 | return; | |
745 | } | |
746 | ||
747 | if (u->last_session_timestamp != USEC_INFINITY) | |
748 | return; /* Timer already started */ | |
749 | ||
750 | u->last_session_timestamp = now(CLOCK_MONOTONIC); | |
751 | ||
752 | assert(!u->timer_event_source); | |
753 | ||
754 | if (u->manager->user_stop_delay == 0 || u->manager->user_stop_delay == USEC_INFINITY) | |
755 | return; | |
756 | ||
757 | if (sd_event_get_state(u->manager->event) == SD_EVENT_FINISHED) { | |
758 | log_debug("Not allocating user stop timeout, since we are already exiting."); | |
759 | return; | |
760 | } | |
761 | ||
762 | r = sd_event_add_time(u->manager->event, | |
763 | &u->timer_event_source, | |
764 | CLOCK_MONOTONIC, | |
765 | usec_add(u->last_session_timestamp, u->manager->user_stop_delay), 0, | |
766 | user_stop_timeout_callback, u); | |
767 | if (r < 0) | |
768 | log_warning_errno(r, "Failed to enqueue user stop event source, ignoring: %m"); | |
769 | ||
770 | if (DEBUG_LOGGING) { | |
771 | char s[FORMAT_TIMESPAN_MAX]; | |
772 | ||
773 | log_debug("Last session of user '%s' logged out, terminating user context in %s.", | |
774 | u->name, | |
775 | format_timespan(s, sizeof(s), u->manager->user_stop_delay, USEC_PER_MSEC)); | |
776 | } | |
777 | } | |
778 | ||
20263082 LP |
779 | static const char* const user_state_table[_USER_STATE_MAX] = { |
780 | [USER_OFFLINE] = "offline", | |
fb6becb4 | 781 | [USER_OPENING] = "opening", |
20263082 LP |
782 | [USER_LINGERING] = "lingering", |
783 | [USER_ONLINE] = "online", | |
e96cd586 LP |
784 | [USER_ACTIVE] = "active", |
785 | [USER_CLOSING] = "closing" | |
20263082 LP |
786 | }; |
787 | ||
788 | DEFINE_STRING_TABLE_LOOKUP(user_state, UserState); | |
1c231f56 LP |
789 | |
790 | int config_parse_tmpfs_size( | |
791 | const char* unit, | |
792 | const char *filename, | |
793 | unsigned line, | |
794 | const char *section, | |
795 | unsigned section_line, | |
796 | const char *lvalue, | |
797 | int ltype, | |
798 | const char *rvalue, | |
799 | void *data, | |
800 | void *userdata) { | |
801 | ||
a7b46b7d | 802 | uint64_t *sz = data; |
1c231f56 LP |
803 | int r; |
804 | ||
805 | assert(filename); | |
806 | assert(lvalue); | |
807 | assert(rvalue); | |
808 | assert(data); | |
809 | ||
9184ca48 | 810 | /* First, try to parse as percentage */ |
f806dfd3 LP |
811 | r = parse_permille(rvalue); |
812 | if (r > 0 && r < 1000) | |
813 | *sz = physical_memory_scale(r, 1000U); | |
9184ca48 | 814 | else { |
59f448cf | 815 | uint64_t k; |
1c231f56 | 816 | |
9184ca48 LP |
817 | /* If the passed argument was not a percentage, or out of range, parse as byte size */ |
818 | ||
59f448cf | 819 | r = parse_size(rvalue, 1024, &k); |
1e5f4e8b YW |
820 | if (r >= 0 && (k <= 0 || (uint64_t) (size_t) k != k)) |
821 | r = -ERANGE; | |
822 | if (r < 0) { | |
823 | log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue); | |
1c231f56 LP |
824 | return 0; |
825 | } | |
826 | ||
59f448cf | 827 | *sz = PAGE_ALIGN((size_t) k); |
1c231f56 LP |
828 | } |
829 | ||
830 | return 0; | |
831 | } | |
c06eec15 | 832 | |
28414939 ZJS |
833 | int config_parse_compat_user_tasks_max( |
834 | const char *unit, | |
c06eec15 LP |
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 | ||
c06eec15 LP |
845 | assert(filename); |
846 | assert(lvalue); | |
847 | assert(rvalue); | |
848 | assert(data); | |
849 | ||
28414939 ZJS |
850 | log_syntax(unit, LOG_NOTICE, filename, line, 0, |
851 | "Support for option %s= has been removed.", | |
852 | lvalue); | |
948f7ce4 | 853 | log_info("Hint: try creating /etc/systemd/system/user-.slice.d/50-limits.conf with:\n" |
28414939 ZJS |
854 | " [Slice]\n" |
855 | " TasksMax=%s", | |
856 | rvalue); | |
c06eec15 LP |
857 | return 0; |
858 | } |