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service.c
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service.c
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 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 <signal.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
#include <sys/syscall.h>
#include "async.h"
#include "manager.h"
#include "unit.h"
#include "service.h"
#include "load-fragment.h"
#include "load-dropin.h"
#include "log.h"
#include "strv.h"
#include "unit-name.h"
#include "unit-printf.h"
#include "dbus-service.h"
#include "special.h"
#include "exit-status.h"
#include "def.h"
#include "path-util.h"
#include "util.h"
#include "utf8.h"
#include "env-util.h"
#include "fileio.h"
#include "bus-error.h"
#include "bus-util.h"
static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
[SERVICE_DEAD] = UNIT_INACTIVE,
[SERVICE_START_PRE] = UNIT_ACTIVATING,
[SERVICE_START] = UNIT_ACTIVATING,
[SERVICE_START_POST] = UNIT_ACTIVATING,
[SERVICE_RUNNING] = UNIT_ACTIVE,
[SERVICE_EXITED] = UNIT_ACTIVE,
[SERVICE_RELOAD] = UNIT_RELOADING,
[SERVICE_STOP] = UNIT_DEACTIVATING,
[SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
[SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
[SERVICE_STOP_POST] = UNIT_DEACTIVATING,
[SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
[SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
[SERVICE_FAILED] = UNIT_FAILED,
[SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
};
/* For Type=idle we never want to delay any other jobs, hence we
* consider idle jobs active as soon as we start working on them */
static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
[SERVICE_DEAD] = UNIT_INACTIVE,
[SERVICE_START_PRE] = UNIT_ACTIVE,
[SERVICE_START] = UNIT_ACTIVE,
[SERVICE_START_POST] = UNIT_ACTIVE,
[SERVICE_RUNNING] = UNIT_ACTIVE,
[SERVICE_EXITED] = UNIT_ACTIVE,
[SERVICE_RELOAD] = UNIT_RELOADING,
[SERVICE_STOP] = UNIT_DEACTIVATING,
[SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
[SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
[SERVICE_STOP_POST] = UNIT_DEACTIVATING,
[SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
[SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
[SERVICE_FAILED] = UNIT_FAILED,
[SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
};
static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
static void service_init(Unit *u) {
Service *s = SERVICE(u);
assert(u);
assert(u->load_state == UNIT_STUB);
s->timeout_start_usec = u->manager->default_timeout_start_usec;
s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
s->restart_usec = u->manager->default_restart_usec;
s->type = _SERVICE_TYPE_INVALID;
s->socket_fd = -1;
s->guess_main_pid = true;
RATELIMIT_INIT(s->start_limit, u->manager->default_start_limit_interval, u->manager->default_start_limit_burst);
s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
}
static void service_unwatch_control_pid(Service *s) {
assert(s);
if (s->control_pid <= 0)
return;
unit_unwatch_pid(UNIT(s), s->control_pid);
s->control_pid = 0;
}
static void service_unwatch_main_pid(Service *s) {
assert(s);
if (s->main_pid <= 0)
return;
unit_unwatch_pid(UNIT(s), s->main_pid);
s->main_pid = 0;
}
static void service_unwatch_pid_file(Service *s) {
if (!s->pid_file_pathspec)
return;
log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
UNIT(s)->id, s->pid_file_pathspec->path);
path_spec_unwatch(s->pid_file_pathspec);
path_spec_done(s->pid_file_pathspec);
free(s->pid_file_pathspec);
s->pid_file_pathspec = NULL;
}
static int service_set_main_pid(Service *s, pid_t pid) {
pid_t ppid;
assert(s);
if (pid <= 1)
return -EINVAL;
if (pid == getpid())
return -EINVAL;
if (s->main_pid == pid && s->main_pid_known)
return 0;
if (s->main_pid != pid) {
service_unwatch_main_pid(s);
exec_status_start(&s->main_exec_status, pid);
}
s->main_pid = pid;
s->main_pid_known = true;
if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
log_warning_unit(UNIT(s)->id,
"%s: Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.",
UNIT(s)->id, pid);
s->main_pid_alien = true;
} else
s->main_pid_alien = false;
return 0;
}
static void service_close_socket_fd(Service *s) {
assert(s);
if (s->socket_fd < 0)
return;
s->socket_fd = asynchronous_close(s->socket_fd);
}
static void service_connection_unref(Service *s) {
assert(s);
if (!UNIT_ISSET(s->accept_socket))
return;
socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
unit_ref_unset(&s->accept_socket);
}
static void service_stop_watchdog(Service *s) {
assert(s);
s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
}
static void service_start_watchdog(Service *s) {
int r;
assert(s);
if (s->watchdog_usec <= 0)
return;
if (s->watchdog_event_source) {
r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
if (r < 0) {
log_warning_unit(UNIT(s)->id, "%s failed to reset watchdog timer: %s", UNIT(s)->id, strerror(-r));
return;
}
r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
} else {
r = sd_event_add_time(
UNIT(s)->manager->event,
&s->watchdog_event_source,
CLOCK_MONOTONIC,
s->watchdog_timestamp.monotonic + s->watchdog_usec, 0,
service_dispatch_watchdog, s);
if (r < 0) {
log_warning_unit(UNIT(s)->id, "%s failed to add watchdog timer: %s", UNIT(s)->id, strerror(-r));
return;
}
/* Let's process everything else which might be a sign
* of living before we consider a service died. */
r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
}
if (r < 0)
log_warning_unit(UNIT(s)->id, "%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
}
static void service_reset_watchdog(Service *s) {
assert(s);
dual_timestamp_get(&s->watchdog_timestamp);
service_start_watchdog(s);
}
static void service_done(Unit *u) {
Service *s = SERVICE(u);
assert(s);
free(s->pid_file);
s->pid_file = NULL;
free(s->status_text);
s->status_text = NULL;
free(s->reboot_arg);
s->reboot_arg = NULL;
s->exec_runtime = exec_runtime_unref(s->exec_runtime);
exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
s->control_command = NULL;
s->main_command = NULL;
exit_status_set_free(&s->restart_prevent_status);
exit_status_set_free(&s->restart_force_status);
exit_status_set_free(&s->success_status);
/* This will leak a process, but at least no memory or any of
* our resources */
service_unwatch_main_pid(s);
service_unwatch_control_pid(s);
service_unwatch_pid_file(s);
if (s->bus_name) {
unit_unwatch_bus_name(u, s->bus_name);
free(s->bus_name);
s->bus_name = NULL;
}
service_close_socket_fd(s);
service_connection_unref(s);
unit_ref_unset(&s->accept_socket);
service_stop_watchdog(s);
s->timer_event_source = sd_event_source_unref(s->timer_event_source);
}
static int service_arm_timer(Service *s, usec_t usec) {
int r;
assert(s);
if (s->timer_event_source) {
r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
if (r < 0)
return r;
return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
}
return sd_event_add_time(
UNIT(s)->manager->event,
&s->timer_event_source,
CLOCK_MONOTONIC,
now(CLOCK_MONOTONIC) + usec, 0,
service_dispatch_timer, s);
}
static int service_verify(Service *s) {
assert(s);
if (UNIT(s)->load_state != UNIT_LOADED)
return 0;
if (!s->exec_command[SERVICE_EXEC_START]) {
log_error_unit(UNIT(s)->id, "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
return -EINVAL;
}
if (s->type != SERVICE_ONESHOT &&
s->exec_command[SERVICE_EXEC_START]->command_next) {
log_error_unit(UNIT(s)->id, "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
return -EINVAL;
}
if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
log_error_unit(UNIT(s)->id, "%s has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
return -EINVAL;
}
if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
log_error_unit(UNIT(s)->id, "%s has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
return -EINVAL;
}
if (s->type == SERVICE_DBUS && !s->bus_name) {
log_error_unit(UNIT(s)->id, "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
return -EINVAL;
}
if (s->bus_name && s->type != SERVICE_DBUS)
log_warning_unit(UNIT(s)->id, "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.", UNIT(s)->id);
return -EINVAL;
}
return 0;
}
static int service_add_default_dependencies(Service *s) {
int r;
assert(s);
/* Add a number of automatic dependencies useful for the
* majority of services. */
/* First, pull in base system */
r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
SPECIAL_BASIC_TARGET, NULL, true);
if (r < 0)
return r;
/* Second, activate normal shutdown */
r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
SPECIAL_SHUTDOWN_TARGET, NULL, true);
return r;
}
static void service_fix_output(Service *s) {
assert(s);
/* If nothing has been explicitly configured, patch default
* output in. If input is socket/tty we avoid this however,
* since in that case we want output to default to the same
* place as we read input from. */
if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
s->exec_context.std_input == EXEC_INPUT_NULL)
s->exec_context.std_error = UNIT(s)->manager->default_std_error;
if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
s->exec_context.std_input == EXEC_INPUT_NULL)
s->exec_context.std_output = UNIT(s)->manager->default_std_output;
}
static int service_load(Unit *u) {
int r;
Service *s = SERVICE(u);
assert(s);
/* Load a .service file */
r = unit_load_fragment(u);
if (r < 0)
return r;
/* Still nothing found? Then let's give up */
if (u->load_state == UNIT_STUB)
return -ENOENT;
/* This is a new unit? Then let's add in some extras */
if (u->load_state == UNIT_LOADED) {
/* We were able to load something, then let's add in
* the dropin directories. */
r = unit_load_dropin(u);
if (r < 0)
return r;
if (s->type == _SERVICE_TYPE_INVALID)
s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
/* Oneshot services have disabled start timeout by default */
if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
s->timeout_start_usec = 0;
service_fix_output(s);
r = unit_patch_contexts(u);
if (r < 0)
return r;
r = unit_add_exec_dependencies(u, &s->exec_context);
if (r < 0)
return r;
r = unit_add_default_slice(u, &s->cgroup_context);
if (r < 0)
return r;
if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
s->notify_access = NOTIFY_MAIN;
if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
s->notify_access = NOTIFY_MAIN;
if (s->bus_name) {
r = unit_watch_bus_name(u, s->bus_name);
if (r < 0)
return r;
}
if (u->default_dependencies) {
r = service_add_default_dependencies(s);
if (r < 0)
return r;
}
}
return service_verify(s);
}
static void service_dump(Unit *u, FILE *f, const char *prefix) {
ServiceExecCommand c;
Service *s = SERVICE(u);
const char *prefix2;
_cleanup_free_ char *p2 = NULL;
assert(s);
p2 = strappend(prefix, "\t");
prefix2 = p2 ? p2 : prefix;
fprintf(f,
"%sService State: %s\n"
"%sResult: %s\n"
"%sReload Result: %s\n"
"%sPermissionsStartOnly: %s\n"
"%sRootDirectoryStartOnly: %s\n"
"%sRemainAfterExit: %s\n"
"%sGuessMainPID: %s\n"
"%sType: %s\n"
"%sRestart: %s\n"
"%sNotifyAccess: %s\n",
prefix, service_state_to_string(s->state),
prefix, service_result_to_string(s->result),
prefix, service_result_to_string(s->reload_result),
prefix, yes_no(s->permissions_start_only),
prefix, yes_no(s->root_directory_start_only),
prefix, yes_no(s->remain_after_exit),
prefix, yes_no(s->guess_main_pid),
prefix, service_type_to_string(s->type),
prefix, service_restart_to_string(s->restart),
prefix, notify_access_to_string(s->notify_access));
if (s->control_pid > 0)
fprintf(f,
"%sControl PID: "PID_FMT"\n",
prefix, s->control_pid);
if (s->main_pid > 0)
fprintf(f,
"%sMain PID: "PID_FMT"\n"
"%sMain PID Known: %s\n"
"%sMain PID Alien: %s\n",
prefix, s->main_pid,
prefix, yes_no(s->main_pid_known),
prefix, yes_no(s->main_pid_alien));
if (s->pid_file)
fprintf(f,
"%sPIDFile: %s\n",
prefix, s->pid_file);
if (s->bus_name)
fprintf(f,
"%sBusName: %s\n"
"%sBus Name Good: %s\n",
prefix, s->bus_name,
prefix, yes_no(s->bus_name_good));
kill_context_dump(&s->kill_context, f, prefix);
exec_context_dump(&s->exec_context, f, prefix);
for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
if (!s->exec_command[c])
continue;
fprintf(f, "%s-> %s:\n",
prefix, service_exec_command_to_string(c));
exec_command_dump_list(s->exec_command[c], f, prefix2);
}
#ifdef HAVE_SYSV_COMPAT
if (s->sysv_start_priority >= 0)
fprintf(f,
"%sSysVStartPriority: %i\n",
prefix, s->sysv_start_priority);
#endif
if (s->status_text)
fprintf(f, "%sStatus Text: %s\n",
prefix, s->status_text);
}
static int service_load_pid_file(Service *s, bool may_warn) {
_cleanup_free_ char *k = NULL;
int r;
pid_t pid;
assert(s);
if (!s->pid_file)
return -ENOENT;
r = read_one_line_file(s->pid_file, &k);
if (r < 0) {
if (may_warn)
log_info_unit(UNIT(s)->id,
"PID file %s not readable (yet?) after %s.",
s->pid_file, service_state_to_string(s->state));
return r;
}
r = parse_pid(k, &pid);
if (r < 0) {
if (may_warn)
log_info_unit(UNIT(s)->id,
"Failed to read PID from file %s: %s",
s->pid_file, strerror(-r));
return r;
}
if (!pid_is_alive(pid)) {
if (may_warn)
log_info_unit(UNIT(s)->id, "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
return -ESRCH;
}
if (s->main_pid_known) {
if (pid == s->main_pid)
return 0;
log_debug_unit(UNIT(s)->id,
"Main PID changing: "PID_FMT" -> "PID_FMT,
s->main_pid, pid);
service_unwatch_main_pid(s);
s->main_pid_known = false;
} else
log_debug_unit(UNIT(s)->id,
"Main PID loaded: "PID_FMT, pid);
r = service_set_main_pid(s, pid);
if (r < 0)
return r;
r = unit_watch_pid(UNIT(s), pid);
if (r < 0) {
/* FIXME: we need to do something here */
log_warning_unit(UNIT(s)->id,
"Failed to watch PID "PID_FMT" from service %s",
pid, UNIT(s)->id);
return r;
}
return 0;
}
static int service_search_main_pid(Service *s) {
pid_t pid;
int r;
assert(s);
/* If we know it anyway, don't ever fallback to unreliable
* heuristics */
if (s->main_pid_known)
return 0;
if (!s->guess_main_pid)
return 0;
assert(s->main_pid <= 0);
pid = unit_search_main_pid(UNIT(s));
if (pid <= 0)
return -ENOENT;
log_debug_unit(UNIT(s)->id,
"Main PID guessed: "PID_FMT, pid);
r = service_set_main_pid(s, pid);
if (r < 0)
return r;
r = unit_watch_pid(UNIT(s), pid);
if (r < 0)
/* FIXME: we need to do something here */
log_warning_unit(UNIT(s)->id,
"Failed to watch PID "PID_FMT" from service %s",
pid, UNIT(s)->id);
return r;
}
static void service_set_state(Service *s, ServiceState state) {
ServiceState old_state;
const UnitActiveState *table;
assert(s);
table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
old_state = s->state;
s->state = state;
service_unwatch_pid_file(s);
if (!IN_SET(state,
SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
SERVICE_AUTO_RESTART))
s->timer_event_source = sd_event_source_unref(s->timer_event_source);
if (!IN_SET(state,
SERVICE_START, SERVICE_START_POST,
SERVICE_RUNNING, SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
service_unwatch_main_pid(s);
s->main_command = NULL;
}
if (!IN_SET(state,
SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
service_unwatch_control_pid(s);
s->control_command = NULL;
s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
}
if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
unit_unwatch_all_pids(UNIT(s));
if (!IN_SET(state,
SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
SERVICE_RUNNING, SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
!(state == SERVICE_DEAD && UNIT(s)->job)) {
service_close_socket_fd(s);
service_connection_unref(s);
}
if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
service_stop_watchdog(s);
/* For the inactive states unit_notify() will trim the cgroup,
* but for exit we have to do that ourselves... */
if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
unit_destroy_cgroup(UNIT(s));
/* For remain_after_exit services, let's see if we can "release" the
* hold on the console, since unit_notify() only does that in case of
* change of state */
if (state == SERVICE_EXITED && s->remain_after_exit &&
UNIT(s)->manager->n_on_console > 0) {
ExecContext *ec = unit_get_exec_context(UNIT(s));
if (ec && exec_context_may_touch_console(ec)) {
Manager *m = UNIT(s)->manager;
m->n_on_console --;
if (m->n_on_console == 0)
/* unset no_console_output flag, since the console is free */
m->no_console_output = false;
}
}
if (old_state != state)
log_debug_unit(UNIT(s)->id, "%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
s->reload_result = SERVICE_SUCCESS;
}
static int service_coldplug(Unit *u) {
Service *s = SERVICE(u);
int r;
assert(s);
assert(s->state == SERVICE_DEAD);
if (s->deserialized_state != s->state) {
if (IN_SET(s->deserialized_state,
SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
usec_t k;
k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec;
/* For the start/stop timeouts 0 means off */
if (k > 0) {
r = service_arm_timer(s, k);
if (r < 0)
return r;
}
}
if (s->deserialized_state == SERVICE_AUTO_RESTART) {
/* The restart timeouts 0 means immediately */
r = service_arm_timer(s, s->restart_usec);
if (r < 0)
return r;
}
if (pid_is_unwaited(s->main_pid) &&
((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
IN_SET(s->deserialized_state,
SERVICE_START, SERVICE_START_POST,
SERVICE_RUNNING, SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
r = unit_watch_pid(UNIT(s), s->main_pid);
if (r < 0)
return r;
}
if (pid_is_unwaited(s->control_pid) &&
IN_SET(s->deserialized_state,
SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
SERVICE_RELOAD,
SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
SERVICE_STOP_POST,
SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
r = unit_watch_pid(UNIT(s), s->control_pid);
if (r < 0)
return r;
}
if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
unit_watch_all_pids(UNIT(s));
if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
service_start_watchdog(s);
service_set_state(s, s->deserialized_state);
}
return 0;
}
static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
Iterator i;
int r;
int *rfds = NULL;
unsigned rn_fds = 0;
Unit *u;
assert(s);
assert(fds);
assert(n_fds);
if (s->socket_fd >= 0)
return 0;
SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
int *cfds;
unsigned cn_fds;
Socket *sock;
if (u->type != UNIT_SOCKET)
continue;
sock = SOCKET(u);
r = socket_collect_fds(sock, &cfds, &cn_fds);
if (r < 0)
goto fail;
if (!cfds)
continue;
if (!rfds) {
rfds = cfds;
rn_fds = cn_fds;
} else {
int *t;
t = new(int, rn_fds+cn_fds);
if (!t) {
free(cfds);
r = -ENOMEM;
goto fail;
}
memcpy(t, rfds, rn_fds * sizeof(int));
memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
free(rfds);
free(cfds);
rfds = t;
rn_fds = rn_fds+cn_fds;
}
}
*fds = rfds;
*n_fds = rn_fds;
return 0;
fail:
free(rfds);
return r;
}
static int service_spawn(
Service *s,
ExecCommand *c,
bool timeout,
bool pass_fds,
bool apply_permissions,
bool apply_chroot,
bool apply_tty_stdin,
bool set_notify_socket,
bool is_control,
pid_t *_pid) {
pid_t pid;
int r;
int *fds = NULL;
_cleanup_free_ int *fdsbuf = NULL;
unsigned n_fds = 0, n_env = 0;
_cleanup_strv_free_ char
**argv = NULL, **final_env = NULL, **our_env = NULL;
const char *path;
assert(s);
assert(c);
assert(_pid);
unit_realize_cgroup(UNIT(s));
r = unit_setup_exec_runtime(UNIT(s));
if (r < 0)
goto fail;
if (pass_fds ||
s->exec_context.std_input == EXEC_INPUT_SOCKET ||
s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
if (s->socket_fd >= 0) {
fds = &s->socket_fd;
n_fds = 1;
} else {
r = service_collect_fds(s, &fdsbuf, &n_fds);
if (r < 0)
goto fail;
fds = fdsbuf;
}
}
if (timeout && s->timeout_start_usec > 0) {
r = service_arm_timer(s, s->timeout_start_usec);
if (r < 0)
goto fail;
} else
s->timer_event_source = sd_event_source_unref(s->timer_event_source);
r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
if (r < 0)
goto fail;
our_env = new0(char*, 4);
if (!our_env) {
r = -ENOMEM;
goto fail;
}
if (set_notify_socket)
if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
r = -ENOMEM;
goto fail;
}
if (s->main_pid > 0)
if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) {
r = -ENOMEM;
goto fail;
}
if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) {
r = -ENOMEM;
goto fail;
}
final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
if (!final_env) {
r = -ENOMEM;
goto fail;
}
if (is_control && UNIT(s)->cgroup_path) {
path = strappenda(UNIT(s)->cgroup_path, "/control");
cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
} else
path = UNIT(s)->cgroup_path;
r = exec_spawn(c,
argv,
&s->exec_context,
fds, n_fds,
final_env,
apply_permissions,
apply_chroot,
apply_tty_stdin,
UNIT(s)->manager->confirm_spawn,
UNIT(s)->manager->cgroup_supported,
path,
manager_get_runtime_prefix(UNIT(s)->manager),
UNIT(s)->id,
s->watchdog_usec,
s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
s->exec_runtime,
&pid);
if (r < 0)
goto fail;
r = unit_watch_pid(UNIT(s), pid);
if (r < 0)
/* FIXME: we need to do something here */
goto fail;
*_pid = pid;
return 0;
fail:
if (timeout)