1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 Lennart Poettering
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.
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.
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/>.
24 #include <sys/epoll.h>
31 #include "path-util.h"
32 #include "logind-inhibit.h"
35 Inhibitor* inhibitor_new(Manager *m, const char* id) {
40 i = new0(Inhibitor, 1);
44 i->state_file = strappend("/run/systemd/inhibit/", id);
50 i->id = path_get_file_name(i->state_file);
52 if (hashmap_put(m->inhibitors, i->id, i) < 0) {
64 void inhibitor_free(Inhibitor *i) {
70 hashmap_remove(i->manager->inhibitors, i->id);
71 inhibitor_remove_fifo(i);
74 unlink(i->state_file);
81 int inhibitor_save(Inhibitor *i) {
88 r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
92 r = fopen_temporary(i->state_file, &f, &temp_path);
96 fchmod(fileno(f), 0644);
99 "# This is private data. Do not parse.\n"
104 inhibit_what_to_string(i->what),
105 inhibit_mode_to_string(i->mode),
106 (unsigned long) i->uid,
107 (unsigned long) i->pid);
110 cc = cescape(i->who);
114 fprintf(f, "WHO=%s\n", cc);
120 cc = cescape(i->why);
124 fprintf(f, "WHY=%s\n", cc);
130 fprintf(f, "FIFO=%s\n", i->fifo_path);
134 if (ferror(f) || rename(temp_path, i->state_file) < 0) {
136 unlink(i->state_file);
145 log_error("Failed to save inhibit data for %s: %s", i->id, strerror(-r));
150 int inhibitor_start(Inhibitor *i) {
156 dual_timestamp_get(&i->since);
158 log_debug("Inhibitor %s (%s) pid=%lu uid=%lu mode=%s started.",
159 strna(i->who), strna(i->why),
160 (unsigned long) i->pid, (unsigned long) i->uid,
161 inhibit_mode_to_string(i->mode));
167 manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited\0" : "DelayInhibited\0");
172 int inhibitor_stop(Inhibitor *i) {
176 log_debug("Inhibitor %s (%s) pid=%lu uid=%lu mode=%s stopped.",
177 strna(i->who), strna(i->why),
178 (unsigned long) i->pid, (unsigned long) i->uid,
179 inhibit_mode_to_string(i->mode));
182 unlink(i->state_file);
186 manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited\0" : "DelayInhibited\0");
191 int inhibitor_load(Inhibitor *i) {
203 r = parse_env_file(i->state_file, NEWLINE,
210 "FIFO", &i->fifo_path,
215 w = what ? inhibit_what_from_string(what) : 0;
219 mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK;
224 r = parse_uid(uid, &i->uid);
230 r = parse_pid(pid, &i->pid);
260 fd = inhibitor_create_fifo(i);
262 close_nointr_nofail(fd);
275 int inhibitor_create_fifo(Inhibitor *i) {
282 r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
286 if (asprintf(&i->fifo_path, "/run/systemd/inhibit/%s.ref", i->id) < 0)
289 if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST)
293 /* Open reading side */
294 if (i->fifo_fd < 0) {
295 struct epoll_event ev;
297 i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
301 r = hashmap_put(i->manager->inhibitor_fds, INT_TO_PTR(i->fifo_fd + 1), i);
307 ev.data.u32 = FD_OTHER_BASE + i->fifo_fd;
309 if (epoll_ctl(i->manager->epoll_fd, EPOLL_CTL_ADD, i->fifo_fd, &ev) < 0)
313 /* Open writing side */
314 r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
321 void inhibitor_remove_fifo(Inhibitor *i) {
324 if (i->fifo_fd >= 0) {
325 assert_se(hashmap_remove(i->manager->inhibitor_fds, INT_TO_PTR(i->fifo_fd + 1)) == i);
326 assert_se(epoll_ctl(i->manager->epoll_fd, EPOLL_CTL_DEL, i->fifo_fd, NULL) == 0);
327 close_nointr_nofail(i->fifo_fd);
332 unlink(i->fifo_path);
338 InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) {
341 InhibitWhat what = 0;
345 HASHMAP_FOREACH(i, m->inhibitor_fds, j)
352 static int pid_is_active(Manager *m, pid_t pid) {
356 r = manager_get_session_by_pid(m, pid, &s);
360 /* If there's no session assigned to it, then it's globally
361 * active on all ttys */
365 return session_is_active(s);
368 bool manager_is_inhibited(
372 dual_timestamp *since,
373 bool ignore_inactive,
379 struct dual_timestamp ts = { 0, 0 };
380 bool inhibited = false;
383 assert(w > 0 && w < _INHIBIT_WHAT_MAX);
385 HASHMAP_FOREACH(i, m->inhibitor_fds, j) {
392 if (ignore_inactive && pid_is_active(m, i->pid) <= 0)
395 if (ignore_uid && i->uid == uid)
399 i->since.monotonic < ts.monotonic)
411 const char *inhibit_what_to_string(InhibitWhat w) {
412 static __thread char buffer[97];
415 if (w < 0 || w >= _INHIBIT_WHAT_MAX)
419 if (w & INHIBIT_SHUTDOWN)
420 p = stpcpy(p, "shutdown:");
421 if (w & INHIBIT_SLEEP)
422 p = stpcpy(p, "sleep:");
423 if (w & INHIBIT_IDLE)
424 p = stpcpy(p, "idle:");
425 if (w & INHIBIT_HANDLE_POWER_KEY)
426 p = stpcpy(p, "handle-power-key:");
427 if (w & INHIBIT_HANDLE_SUSPEND_KEY)
428 p = stpcpy(p, "handle-suspend-key:");
429 if (w & INHIBIT_HANDLE_HIBERNATE_KEY)
430 p = stpcpy(p, "handle-hibernate-key:");
431 if (w & INHIBIT_HANDLE_LID_SWITCH)
432 p = stpcpy(p, "handle-lid-switch:");
442 InhibitWhat inhibit_what_from_string(const char *s) {
443 InhibitWhat what = 0;
447 FOREACH_WORD_SEPARATOR(w, l, s, ":", state) {
448 if (l == 8 && strneq(w, "shutdown", l))
449 what |= INHIBIT_SHUTDOWN;
450 else if (l == 5 && strneq(w, "sleep", l))
451 what |= INHIBIT_SLEEP;
452 else if (l == 4 && strneq(w, "idle", l))
453 what |= INHIBIT_IDLE;
454 else if (l == 16 && strneq(w, "handle-power-key", l))
455 what |= INHIBIT_HANDLE_POWER_KEY;
456 else if (l == 18 && strneq(w, "handle-suspend-key", l))
457 what |= INHIBIT_HANDLE_SUSPEND_KEY;
458 else if (l == 20 && strneq(w, "handle-hibernate-key", l))
459 what |= INHIBIT_HANDLE_HIBERNATE_KEY;
460 else if (l == 17 && strneq(w, "handle-lid-switch", l))
461 what |= INHIBIT_HANDLE_LID_SWITCH;
463 return _INHIBIT_WHAT_INVALID;
469 static const char* const inhibit_mode_table[_INHIBIT_MODE_MAX] = {
470 [INHIBIT_BLOCK] = "block",
471 [INHIBIT_DELAY] = "delay"
474 DEFINE_STRING_TABLE_LOOKUP(inhibit_mode, InhibitMode);