481 lines
12 KiB
C
481 lines
12 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2012 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
#include "mkdir.h"
|
|
#include "logind-inhibit.h"
|
|
#include "fileio.h"
|
|
#include "formats-util.h"
|
|
|
|
Inhibitor* inhibitor_new(Manager *m, const char* id) {
|
|
Inhibitor *i;
|
|
|
|
assert(m);
|
|
|
|
i = new0(Inhibitor, 1);
|
|
if (!i)
|
|
return NULL;
|
|
|
|
i->state_file = strappend("/run/systemd/inhibit/", id);
|
|
if (!i->state_file) {
|
|
free(i);
|
|
return NULL;
|
|
}
|
|
|
|
i->id = basename(i->state_file);
|
|
|
|
if (hashmap_put(m->inhibitors, i->id, i) < 0) {
|
|
free(i->state_file);
|
|
free(i);
|
|
return NULL;
|
|
}
|
|
|
|
i->manager = m;
|
|
i->fifo_fd = -1;
|
|
|
|
return i;
|
|
}
|
|
|
|
void inhibitor_free(Inhibitor *i) {
|
|
assert(i);
|
|
|
|
hashmap_remove(i->manager->inhibitors, i->id);
|
|
|
|
inhibitor_remove_fifo(i);
|
|
|
|
free(i->who);
|
|
free(i->why);
|
|
|
|
if (i->state_file) {
|
|
unlink(i->state_file);
|
|
free(i->state_file);
|
|
}
|
|
|
|
free(i);
|
|
}
|
|
|
|
int inhibitor_save(Inhibitor *i) {
|
|
_cleanup_free_ char *temp_path = NULL;
|
|
_cleanup_fclose_ FILE *f = NULL;
|
|
int r;
|
|
|
|
assert(i);
|
|
|
|
r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
r = fopen_temporary(i->state_file, &f, &temp_path);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
fchmod(fileno(f), 0644);
|
|
|
|
fprintf(f,
|
|
"# This is private data. Do not parse.\n"
|
|
"WHAT=%s\n"
|
|
"MODE=%s\n"
|
|
"UID="UID_FMT"\n"
|
|
"PID="PID_FMT"\n",
|
|
inhibit_what_to_string(i->what),
|
|
inhibit_mode_to_string(i->mode),
|
|
i->uid,
|
|
i->pid);
|
|
|
|
if (i->who) {
|
|
_cleanup_free_ char *cc = NULL;
|
|
|
|
cc = cescape(i->who);
|
|
if (!cc) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
fprintf(f, "WHO=%s\n", cc);
|
|
}
|
|
|
|
if (i->why) {
|
|
_cleanup_free_ char *cc = NULL;
|
|
|
|
cc = cescape(i->why);
|
|
if (!cc) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
fprintf(f, "WHY=%s\n", cc);
|
|
}
|
|
|
|
if (i->fifo_path)
|
|
fprintf(f, "FIFO=%s\n", i->fifo_path);
|
|
|
|
r = fflush_and_check(f);
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
if (rename(temp_path, i->state_file) < 0) {
|
|
r = -errno;
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
(void) unlink(i->state_file);
|
|
|
|
if (temp_path)
|
|
(void) unlink(temp_path);
|
|
|
|
return log_error_errno(r, "Failed to save inhibit data %s: %m", i->state_file);
|
|
}
|
|
|
|
int inhibitor_start(Inhibitor *i) {
|
|
assert(i);
|
|
|
|
if (i->started)
|
|
return 0;
|
|
|
|
dual_timestamp_get(&i->since);
|
|
|
|
log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s started.",
|
|
strna(i->who), strna(i->why),
|
|
i->pid, i->uid,
|
|
inhibit_mode_to_string(i->mode));
|
|
|
|
inhibitor_save(i);
|
|
|
|
i->started = true;
|
|
|
|
manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int inhibitor_stop(Inhibitor *i) {
|
|
assert(i);
|
|
|
|
if (i->started)
|
|
log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s stopped.",
|
|
strna(i->who), strna(i->why),
|
|
i->pid, i->uid,
|
|
inhibit_mode_to_string(i->mode));
|
|
|
|
if (i->state_file)
|
|
unlink(i->state_file);
|
|
|
|
i->started = false;
|
|
|
|
manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int inhibitor_load(Inhibitor *i) {
|
|
|
|
_cleanup_free_ char
|
|
*what = NULL,
|
|
*uid = NULL,
|
|
*pid = NULL,
|
|
*who = NULL,
|
|
*why = NULL,
|
|
*mode = NULL;
|
|
|
|
InhibitWhat w;
|
|
InhibitMode mm;
|
|
char *cc;
|
|
int r;
|
|
|
|
r = parse_env_file(i->state_file, NEWLINE,
|
|
"WHAT", &what,
|
|
"UID", &uid,
|
|
"PID", &pid,
|
|
"WHO", &who,
|
|
"WHY", &why,
|
|
"MODE", &mode,
|
|
"FIFO", &i->fifo_path,
|
|
NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
w = what ? inhibit_what_from_string(what) : 0;
|
|
if (w >= 0)
|
|
i->what = w;
|
|
|
|
mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK;
|
|
if (mm >= 0)
|
|
i->mode = mm;
|
|
|
|
if (uid) {
|
|
r = parse_uid(uid, &i->uid);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (pid) {
|
|
r = parse_pid(pid, &i->pid);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (who) {
|
|
r = cunescape(who, 0, &cc);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
free(i->who);
|
|
i->who = cc;
|
|
}
|
|
|
|
if (why) {
|
|
r = cunescape(why, 0, &cc);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
free(i->why);
|
|
i->why = cc;
|
|
}
|
|
|
|
if (i->fifo_path) {
|
|
int fd;
|
|
|
|
fd = inhibitor_create_fifo(i);
|
|
safe_close(fd);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int inhibitor_dispatch_fifo(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
|
|
Inhibitor *i = userdata;
|
|
|
|
assert(s);
|
|
assert(fd == i->fifo_fd);
|
|
assert(i);
|
|
|
|
inhibitor_stop(i);
|
|
inhibitor_free(i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int inhibitor_create_fifo(Inhibitor *i) {
|
|
int r;
|
|
|
|
assert(i);
|
|
|
|
/* Create FIFO */
|
|
if (!i->fifo_path) {
|
|
r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
i->fifo_path = strjoin("/run/systemd/inhibit/", i->id, ".ref", NULL);
|
|
if (!i->fifo_path)
|
|
return -ENOMEM;
|
|
|
|
if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST)
|
|
return -errno;
|
|
}
|
|
|
|
/* Open reading side */
|
|
if (i->fifo_fd < 0) {
|
|
i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
|
|
if (i->fifo_fd < 0)
|
|
return -errno;
|
|
}
|
|
|
|
if (!i->event_source) {
|
|
r = sd_event_add_io(i->manager->event, &i->event_source, i->fifo_fd, 0, inhibitor_dispatch_fifo, i);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
/* Open writing side */
|
|
r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
|
|
if (r < 0)
|
|
return -errno;
|
|
|
|
return r;
|
|
}
|
|
|
|
void inhibitor_remove_fifo(Inhibitor *i) {
|
|
assert(i);
|
|
|
|
i->event_source = sd_event_source_unref(i->event_source);
|
|
i->fifo_fd = safe_close(i->fifo_fd);
|
|
|
|
if (i->fifo_path) {
|
|
unlink(i->fifo_path);
|
|
i->fifo_path = mfree(i->fifo_path);
|
|
}
|
|
}
|
|
|
|
InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) {
|
|
Inhibitor *i;
|
|
Iterator j;
|
|
InhibitWhat what = 0;
|
|
|
|
assert(m);
|
|
|
|
HASHMAP_FOREACH(i, m->inhibitors, j)
|
|
if (i->mode == mm)
|
|
what |= i->what;
|
|
|
|
return what;
|
|
}
|
|
|
|
static int pid_is_active(Manager *m, pid_t pid) {
|
|
Session *s;
|
|
int r;
|
|
|
|
r = manager_get_session_by_pid(m, pid, &s);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* If there's no session assigned to it, then it's globally
|
|
* active on all ttys */
|
|
if (r == 0)
|
|
return 1;
|
|
|
|
return session_is_active(s);
|
|
}
|
|
|
|
bool manager_is_inhibited(
|
|
Manager *m,
|
|
InhibitWhat w,
|
|
InhibitMode mm,
|
|
dual_timestamp *since,
|
|
bool ignore_inactive,
|
|
bool ignore_uid,
|
|
uid_t uid,
|
|
Inhibitor **offending) {
|
|
|
|
Inhibitor *i;
|
|
Iterator j;
|
|
struct dual_timestamp ts = DUAL_TIMESTAMP_NULL;
|
|
bool inhibited = false;
|
|
|
|
assert(m);
|
|
assert(w > 0 && w < _INHIBIT_WHAT_MAX);
|
|
|
|
HASHMAP_FOREACH(i, m->inhibitors, j) {
|
|
if (!(i->what & w))
|
|
continue;
|
|
|
|
if (i->mode != mm)
|
|
continue;
|
|
|
|
if (ignore_inactive && pid_is_active(m, i->pid) <= 0)
|
|
continue;
|
|
|
|
if (ignore_uid && i->uid == uid)
|
|
continue;
|
|
|
|
if (!inhibited ||
|
|
i->since.monotonic < ts.monotonic)
|
|
ts = i->since;
|
|
|
|
inhibited = true;
|
|
|
|
if (offending)
|
|
*offending = i;
|
|
}
|
|
|
|
if (since)
|
|
*since = ts;
|
|
|
|
return inhibited;
|
|
}
|
|
|
|
const char *inhibit_what_to_string(InhibitWhat w) {
|
|
static thread_local char buffer[97];
|
|
char *p;
|
|
|
|
if (w < 0 || w >= _INHIBIT_WHAT_MAX)
|
|
return NULL;
|
|
|
|
p = buffer;
|
|
if (w & INHIBIT_SHUTDOWN)
|
|
p = stpcpy(p, "shutdown:");
|
|
if (w & INHIBIT_SLEEP)
|
|
p = stpcpy(p, "sleep:");
|
|
if (w & INHIBIT_IDLE)
|
|
p = stpcpy(p, "idle:");
|
|
if (w & INHIBIT_HANDLE_POWER_KEY)
|
|
p = stpcpy(p, "handle-power-key:");
|
|
if (w & INHIBIT_HANDLE_SUSPEND_KEY)
|
|
p = stpcpy(p, "handle-suspend-key:");
|
|
if (w & INHIBIT_HANDLE_HIBERNATE_KEY)
|
|
p = stpcpy(p, "handle-hibernate-key:");
|
|
if (w & INHIBIT_HANDLE_LID_SWITCH)
|
|
p = stpcpy(p, "handle-lid-switch:");
|
|
|
|
if (p > buffer)
|
|
*(p-1) = 0;
|
|
else
|
|
*p = 0;
|
|
|
|
return buffer;
|
|
}
|
|
|
|
InhibitWhat inhibit_what_from_string(const char *s) {
|
|
InhibitWhat what = 0;
|
|
const char *word, *state;
|
|
size_t l;
|
|
|
|
FOREACH_WORD_SEPARATOR(word, l, s, ":", state) {
|
|
if (l == 8 && strneq(word, "shutdown", l))
|
|
what |= INHIBIT_SHUTDOWN;
|
|
else if (l == 5 && strneq(word, "sleep", l))
|
|
what |= INHIBIT_SLEEP;
|
|
else if (l == 4 && strneq(word, "idle", l))
|
|
what |= INHIBIT_IDLE;
|
|
else if (l == 16 && strneq(word, "handle-power-key", l))
|
|
what |= INHIBIT_HANDLE_POWER_KEY;
|
|
else if (l == 18 && strneq(word, "handle-suspend-key", l))
|
|
what |= INHIBIT_HANDLE_SUSPEND_KEY;
|
|
else if (l == 20 && strneq(word, "handle-hibernate-key", l))
|
|
what |= INHIBIT_HANDLE_HIBERNATE_KEY;
|
|
else if (l == 17 && strneq(word, "handle-lid-switch", l))
|
|
what |= INHIBIT_HANDLE_LID_SWITCH;
|
|
else
|
|
return _INHIBIT_WHAT_INVALID;
|
|
}
|
|
|
|
return what;
|
|
}
|
|
|
|
static const char* const inhibit_mode_table[_INHIBIT_MODE_MAX] = {
|
|
[INHIBIT_BLOCK] = "block",
|
|
[INHIBIT_DELAY] = "delay"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(inhibit_mode, InhibitMode);
|