2 This file is part of systemd.
4 Copyright 2012 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
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
9 (at your option) any later version.
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
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "alloc-util.h"
29 #include "format-util.h"
30 #include "logind-inhibit.h"
32 #include "parse-util.h"
33 #include "string-table.h"
34 #include "string-util.h"
35 #include "user-util.h"
38 Inhibitor* inhibitor_new(Manager *m, const char* id) {
43 i = new0(Inhibitor, 1);
47 i->state_file = strappend("/run/systemd/inhibit/", id);
51 i->id = basename(i->state_file);
53 if (hashmap_put(m->inhibitors, i->id, i) < 0) {
64 void inhibitor_free(Inhibitor *i) {
67 hashmap_remove(i->manager->inhibitors, i->id);
69 inhibitor_remove_fifo(i);
75 unlink(i->state_file);
82 int inhibitor_save(Inhibitor *i) {
83 _cleanup_free_ char *temp_path = NULL;
84 _cleanup_fclose_ FILE *f = NULL;
89 r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
93 r = fopen_temporary(i->state_file, &f, &temp_path);
97 fchmod(fileno(f), 0644);
100 "# This is private data. Do not parse.\n"
105 inhibit_what_to_string(i->what),
106 inhibit_mode_to_string(i->mode),
111 _cleanup_free_ char *cc = NULL;
113 cc = cescape(i->who);
119 fprintf(f, "WHO=%s\n", cc);
123 _cleanup_free_ char *cc = NULL;
125 cc = cescape(i->why);
131 fprintf(f, "WHY=%s\n", cc);
135 fprintf(f, "FIFO=%s\n", i->fifo_path);
137 r = fflush_and_check(f);
141 if (rename(temp_path, i->state_file) < 0) {
149 (void) unlink(i->state_file);
152 (void) unlink(temp_path);
154 return log_error_errno(r, "Failed to save inhibit data %s: %m", i->state_file);
157 int inhibitor_start(Inhibitor *i) {
163 dual_timestamp_get(&i->since);
165 log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s started.",
166 strna(i->who), strna(i->why),
168 inhibit_mode_to_string(i->mode));
174 manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL);
179 int inhibitor_stop(Inhibitor *i) {
183 log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s stopped.",
184 strna(i->who), strna(i->why),
186 inhibit_mode_to_string(i->mode));
189 unlink(i->state_file);
193 manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL);
198 int inhibitor_load(Inhibitor *i) {
213 r = parse_env_file(i->state_file, NEWLINE,
220 "FIFO", &i->fifo_path,
225 w = what ? inhibit_what_from_string(what) : 0;
229 mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK;
234 r = parse_uid(uid, &i->uid);
240 r = parse_pid(pid, &i->pid);
246 r = cunescape(who, 0, &cc);
255 r = cunescape(why, 0, &cc);
266 fd = inhibitor_create_fifo(i);
273 static int inhibitor_dispatch_fifo(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
274 Inhibitor *i = userdata;
277 assert(fd == i->fifo_fd);
286 int inhibitor_create_fifo(Inhibitor *i) {
293 r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
297 i->fifo_path = strjoin("/run/systemd/inhibit/", i->id, ".ref");
301 if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST)
305 /* Open reading side */
306 if (i->fifo_fd < 0) {
307 i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
312 if (!i->event_source) {
313 r = sd_event_add_io(i->manager->event, &i->event_source, i->fifo_fd, 0, inhibitor_dispatch_fifo, i);
317 r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE-10);
322 /* Open writing side */
323 r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
330 void inhibitor_remove_fifo(Inhibitor *i) {
333 i->event_source = sd_event_source_unref(i->event_source);
334 i->fifo_fd = safe_close(i->fifo_fd);
337 unlink(i->fifo_path);
338 i->fifo_path = mfree(i->fifo_path);
342 InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) {
345 InhibitWhat what = 0;
349 HASHMAP_FOREACH(i, m->inhibitors, j)
350 if (i->mode == mm && i->started)
356 static int pid_is_active(Manager *m, pid_t pid) {
360 r = manager_get_session_by_pid(m, pid, &s);
364 /* If there's no session assigned to it, then it's globally
365 * active on all ttys */
369 return session_is_active(s);
372 bool manager_is_inhibited(
376 dual_timestamp *since,
377 bool ignore_inactive,
380 Inhibitor **offending) {
384 struct dual_timestamp ts = DUAL_TIMESTAMP_NULL;
385 bool inhibited = false;
388 assert(w > 0 && w < _INHIBIT_WHAT_MAX);
390 HASHMAP_FOREACH(i, m->inhibitors, j) {
400 if (ignore_inactive && pid_is_active(m, i->pid) <= 0)
403 if (ignore_uid && i->uid == uid)
407 i->since.monotonic < ts.monotonic)
422 const char *inhibit_what_to_string(InhibitWhat w) {
423 static thread_local char buffer[97];
426 if (w < 0 || w >= _INHIBIT_WHAT_MAX)
430 if (w & INHIBIT_SHUTDOWN)
431 p = stpcpy(p, "shutdown:");
432 if (w & INHIBIT_SLEEP)
433 p = stpcpy(p, "sleep:");
434 if (w & INHIBIT_IDLE)
435 p = stpcpy(p, "idle:");
436 if (w & INHIBIT_HANDLE_POWER_KEY)
437 p = stpcpy(p, "handle-power-key:");
438 if (w & INHIBIT_HANDLE_SUSPEND_KEY)
439 p = stpcpy(p, "handle-suspend-key:");
440 if (w & INHIBIT_HANDLE_HIBERNATE_KEY)
441 p = stpcpy(p, "handle-hibernate-key:");
442 if (w & INHIBIT_HANDLE_LID_SWITCH)
443 p = stpcpy(p, "handle-lid-switch:");
453 InhibitWhat inhibit_what_from_string(const char *s) {
454 InhibitWhat what = 0;
455 const char *word, *state;
458 FOREACH_WORD_SEPARATOR(word, l, s, ":", state) {
459 if (l == 8 && strneq(word, "shutdown", l))
460 what |= INHIBIT_SHUTDOWN;
461 else if (l == 5 && strneq(word, "sleep", l))
462 what |= INHIBIT_SLEEP;
463 else if (l == 4 && strneq(word, "idle", l))
464 what |= INHIBIT_IDLE;
465 else if (l == 16 && strneq(word, "handle-power-key", l))
466 what |= INHIBIT_HANDLE_POWER_KEY;
467 else if (l == 18 && strneq(word, "handle-suspend-key", l))
468 what |= INHIBIT_HANDLE_SUSPEND_KEY;
469 else if (l == 20 && strneq(word, "handle-hibernate-key", l))
470 what |= INHIBIT_HANDLE_HIBERNATE_KEY;
471 else if (l == 17 && strneq(word, "handle-lid-switch", l))
472 what |= INHIBIT_HANDLE_LID_SWITCH;
474 return _INHIBIT_WHAT_INVALID;
480 static const char* const inhibit_mode_table[_INHIBIT_MODE_MAX] = {
481 [INHIBIT_BLOCK] = "block",
482 [INHIBIT_DELAY] = "delay"
485 DEFINE_STRING_TABLE_LOOKUP(inhibit_mode, InhibitMode);