1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright 2012 Lennart Poettering
11 #include "alloc-util.h"
15 #include "format-util.h"
16 #include "logind-inhibit.h"
18 #include "parse-util.h"
19 #include "string-table.h"
20 #include "string-util.h"
21 #include "user-util.h"
24 Inhibitor
* inhibitor_new(Manager
*m
, const char* id
) {
29 i
= new0(Inhibitor
, 1);
33 i
->state_file
= strappend("/run/systemd/inhibit/", id
);
37 i
->id
= basename(i
->state_file
);
39 if (hashmap_put(m
->inhibitors
, i
->id
, i
) < 0) {
50 void inhibitor_free(Inhibitor
*i
) {
53 hashmap_remove(i
->manager
->inhibitors
, i
->id
);
55 inhibitor_remove_fifo(i
);
61 unlink(i
->state_file
);
68 int inhibitor_save(Inhibitor
*i
) {
69 _cleanup_free_
char *temp_path
= NULL
;
70 _cleanup_fclose_
FILE *f
= NULL
;
75 r
= mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0, MKDIR_WARN_MODE
);
79 r
= fopen_temporary(i
->state_file
, &f
, &temp_path
);
83 fchmod(fileno(f
), 0644);
86 "# This is private data. Do not parse.\n"
91 inhibit_what_to_string(i
->what
),
92 inhibit_mode_to_string(i
->mode
),
97 _cleanup_free_
char *cc
= NULL
;
105 fprintf(f
, "WHO=%s\n", cc
);
109 _cleanup_free_
char *cc
= NULL
;
111 cc
= cescape(i
->why
);
117 fprintf(f
, "WHY=%s\n", cc
);
121 fprintf(f
, "FIFO=%s\n", i
->fifo_path
);
123 r
= fflush_and_check(f
);
127 if (rename(temp_path
, i
->state_file
) < 0) {
135 (void) unlink(i
->state_file
);
138 (void) unlink(temp_path
);
140 return log_error_errno(r
, "Failed to save inhibit data %s: %m", i
->state_file
);
143 int inhibitor_start(Inhibitor
*i
) {
149 dual_timestamp_get(&i
->since
);
151 log_debug("Inhibitor %s (%s) pid="PID_FMT
" uid="UID_FMT
" mode=%s started.",
152 strna(i
->who
), strna(i
->why
),
154 inhibit_mode_to_string(i
->mode
));
160 manager_send_changed(i
->manager
, i
->mode
== INHIBIT_BLOCK
? "BlockInhibited" : "DelayInhibited", NULL
);
165 int inhibitor_stop(Inhibitor
*i
) {
169 log_debug("Inhibitor %s (%s) pid="PID_FMT
" uid="UID_FMT
" mode=%s stopped.",
170 strna(i
->who
), strna(i
->why
),
172 inhibit_mode_to_string(i
->mode
));
175 unlink(i
->state_file
);
179 manager_send_changed(i
->manager
, i
->mode
== INHIBIT_BLOCK
? "BlockInhibited" : "DelayInhibited", NULL
);
184 int inhibitor_load(Inhibitor
*i
) {
199 r
= parse_env_file(NULL
, i
->state_file
, NEWLINE
,
206 "FIFO", &i
->fifo_path
,
211 w
= what
? inhibit_what_from_string(what
) : 0;
215 mm
= mode
? inhibit_mode_from_string(mode
) : INHIBIT_BLOCK
;
220 r
= parse_uid(uid
, &i
->uid
);
226 r
= parse_pid(pid
, &i
->pid
);
232 r
= cunescape(who
, 0, &cc
);
241 r
= cunescape(why
, 0, &cc
);
252 fd
= inhibitor_create_fifo(i
);
259 static int inhibitor_dispatch_fifo(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
260 Inhibitor
*i
= userdata
;
263 assert(fd
== i
->fifo_fd
);
272 int inhibitor_create_fifo(Inhibitor
*i
) {
279 r
= mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0, MKDIR_WARN_MODE
);
283 i
->fifo_path
= strjoin("/run/systemd/inhibit/", i
->id
, ".ref");
287 if (mkfifo(i
->fifo_path
, 0600) < 0 && errno
!= EEXIST
)
291 /* Open reading side */
292 if (i
->fifo_fd
< 0) {
293 i
->fifo_fd
= open(i
->fifo_path
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
);
298 if (!i
->event_source
) {
299 r
= sd_event_add_io(i
->manager
->event
, &i
->event_source
, i
->fifo_fd
, 0, inhibitor_dispatch_fifo
, i
);
303 r
= sd_event_source_set_priority(i
->event_source
, SD_EVENT_PRIORITY_IDLE
-10);
308 /* Open writing side */
309 r
= open(i
->fifo_path
, O_WRONLY
|O_CLOEXEC
|O_NONBLOCK
);
316 void inhibitor_remove_fifo(Inhibitor
*i
) {
319 i
->event_source
= sd_event_source_unref(i
->event_source
);
320 i
->fifo_fd
= safe_close(i
->fifo_fd
);
323 unlink(i
->fifo_path
);
324 i
->fifo_path
= mfree(i
->fifo_path
);
328 InhibitWhat
manager_inhibit_what(Manager
*m
, InhibitMode mm
) {
331 InhibitWhat what
= 0;
335 HASHMAP_FOREACH(i
, m
->inhibitors
, j
)
336 if (i
->mode
== mm
&& i
->started
)
342 static int pid_is_active(Manager
*m
, pid_t pid
) {
346 /* Get client session. This is not what you are looking for these days.
348 r
= manager_get_session_by_pid(m
, pid
, &s
);
352 /* If there's no session assigned to it, then it's globally
353 * active on all ttys */
357 return session_is_active(s
);
360 bool manager_is_inhibited(
364 dual_timestamp
*since
,
365 bool ignore_inactive
,
368 Inhibitor
**offending
) {
372 struct dual_timestamp ts
= DUAL_TIMESTAMP_NULL
;
373 bool inhibited
= false;
376 assert(w
> 0 && w
< _INHIBIT_WHAT_MAX
);
378 HASHMAP_FOREACH(i
, m
->inhibitors
, j
) {
388 if (ignore_inactive
&& pid_is_active(m
, i
->pid
) <= 0)
391 if (ignore_uid
&& i
->uid
== uid
)
395 i
->since
.monotonic
< ts
.monotonic
)
410 const char *inhibit_what_to_string(InhibitWhat w
) {
411 static thread_local
char buffer
[97];
414 if (w
< 0 || w
>= _INHIBIT_WHAT_MAX
)
418 if (w
& INHIBIT_SHUTDOWN
)
419 p
= stpcpy(p
, "shutdown:");
420 if (w
& INHIBIT_SLEEP
)
421 p
= stpcpy(p
, "sleep:");
422 if (w
& INHIBIT_IDLE
)
423 p
= stpcpy(p
, "idle:");
424 if (w
& INHIBIT_HANDLE_POWER_KEY
)
425 p
= stpcpy(p
, "handle-power-key:");
426 if (w
& INHIBIT_HANDLE_SUSPEND_KEY
)
427 p
= stpcpy(p
, "handle-suspend-key:");
428 if (w
& INHIBIT_HANDLE_HIBERNATE_KEY
)
429 p
= stpcpy(p
, "handle-hibernate-key:");
430 if (w
& INHIBIT_HANDLE_LID_SWITCH
)
431 p
= stpcpy(p
, "handle-lid-switch:");
441 InhibitWhat
inhibit_what_from_string(const char *s
) {
442 InhibitWhat what
= 0;
443 const char *word
, *state
;
446 FOREACH_WORD_SEPARATOR(word
, l
, s
, ":", state
) {
447 if (l
== 8 && strneq(word
, "shutdown", l
))
448 what
|= INHIBIT_SHUTDOWN
;
449 else if (l
== 5 && strneq(word
, "sleep", l
))
450 what
|= INHIBIT_SLEEP
;
451 else if (l
== 4 && strneq(word
, "idle", l
))
452 what
|= INHIBIT_IDLE
;
453 else if (l
== 16 && strneq(word
, "handle-power-key", l
))
454 what
|= INHIBIT_HANDLE_POWER_KEY
;
455 else if (l
== 18 && strneq(word
, "handle-suspend-key", l
))
456 what
|= INHIBIT_HANDLE_SUSPEND_KEY
;
457 else if (l
== 20 && strneq(word
, "handle-hibernate-key", l
))
458 what
|= INHIBIT_HANDLE_HIBERNATE_KEY
;
459 else if (l
== 17 && strneq(word
, "handle-lid-switch", l
))
460 what
|= INHIBIT_HANDLE_LID_SWITCH
;
462 return _INHIBIT_WHAT_INVALID
;
468 static const char* const inhibit_mode_table
[_INHIBIT_MODE_MAX
] = {
469 [INHIBIT_BLOCK
] = "block",
470 [INHIBIT_DELAY
] = "delay"
473 DEFINE_STRING_TABLE_LOOKUP(inhibit_mode
, InhibitMode
);