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 "formats-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);
53 i->id = basename(i->state_file);
55 if (hashmap_put(m->inhibitors, i->id, i) < 0) {
67 void inhibitor_free(Inhibitor *i) {
70 hashmap_remove(i->manager->inhibitors, i->id);
72 inhibitor_remove_fifo(i);
78 unlink(i->state_file);
85 int inhibitor_save(Inhibitor *i) {
86 _cleanup_free_ char *temp_path = NULL;
87 _cleanup_fclose_ FILE *f = NULL;
92 r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
96 r = fopen_temporary(i->state_file, &f, &temp_path);
100 fchmod(fileno(f), 0644);
103 "# This is private data. Do not parse.\n"
108 inhibit_what_to_string(i->what),
109 inhibit_mode_to_string(i->mode),
114 _cleanup_free_ char *cc = NULL;
116 cc = cescape(i->who);
122 fprintf(f, "WHO=%s\n", cc);
126 _cleanup_free_ char *cc = NULL;
128 cc = cescape(i->why);
134 fprintf(f, "WHY=%s\n", cc);
138 fprintf(f, "FIFO=%s\n", i->fifo_path);
140 r = fflush_and_check(f);
144 if (rename(temp_path, i->state_file) < 0) {
152 (void) unlink(i->state_file);
155 (void) unlink(temp_path);
157 return log_error_errno(r, "Failed to save inhibit data %s: %m", i->state_file);
160 int inhibitor_start(Inhibitor *i) {
166 dual_timestamp_get(&i->since);
168 log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s started.",
169 strna(i->who), strna(i->why),
171 inhibit_mode_to_string(i->mode));
177 manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL);
182 int inhibitor_stop(Inhibitor *i) {
186 log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s stopped.",
187 strna(i->who), strna(i->why),
189 inhibit_mode_to_string(i->mode));
192 unlink(i->state_file);
196 manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL);
201 int inhibitor_load(Inhibitor *i) {
216 r = parse_env_file(i->state_file, NEWLINE,
223 "FIFO", &i->fifo_path,
228 w = what ? inhibit_what_from_string(what) : 0;
232 mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK;
237 r = parse_uid(uid, &i->uid);
243 r = parse_pid(pid, &i->pid);
249 r = cunescape(who, 0, &cc);
258 r = cunescape(why, 0, &cc);
269 fd = inhibitor_create_fifo(i);
276 static int inhibitor_dispatch_fifo(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
277 Inhibitor *i = userdata;
280 assert(fd == i->fifo_fd);
289 int inhibitor_create_fifo(Inhibitor *i) {
296 r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
300 i->fifo_path = strjoin("/run/systemd/inhibit/", i->id, ".ref", NULL);
304 if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST)
308 /* Open reading side */
309 if (i->fifo_fd < 0) {
310 i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
315 if (!i->event_source) {
316 r = sd_event_add_io(i->manager->event, &i->event_source, i->fifo_fd, 0, inhibitor_dispatch_fifo, i);
320 r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE-10);
325 /* Open writing side */
326 r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
333 void inhibitor_remove_fifo(Inhibitor *i) {
336 i->event_source = sd_event_source_unref(i->event_source);
337 i->fifo_fd = safe_close(i->fifo_fd);
340 unlink(i->fifo_path);
341 i->fifo_path = mfree(i->fifo_path);
345 InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) {
348 InhibitWhat what = 0;
352 HASHMAP_FOREACH(i, m->inhibitors, j)
359 static int pid_is_active(Manager *m, pid_t pid) {
363 r = manager_get_session_by_pid(m, pid, &s);
367 /* If there's no session assigned to it, then it's globally
368 * active on all ttys */
372 return session_is_active(s);
375 bool manager_is_inhibited(
379 dual_timestamp *since,
380 bool ignore_inactive,
383 Inhibitor **offending) {
387 struct dual_timestamp ts = DUAL_TIMESTAMP_NULL;
388 bool inhibited = false;
391 assert(w > 0 && w < _INHIBIT_WHAT_MAX);
393 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);