/*-*- 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 .
***/
#include
#include
#include
#include
#include
#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"
#ifdef HAVE_SYSV_COMPAT
#define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
typedef enum RunlevelType {
RUNLEVEL_UP,
RUNLEVEL_DOWN
} RunlevelType;
static const struct {
const char *path;
const char *target;
const RunlevelType type;
} rcnd_table[] = {
/* Standard SysV runlevels for start-up */
{ "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
{ "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
{ "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
{ "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
{ "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
/* Standard SysV runlevels for shutdown */
{ "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
{ "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
/* Note that the order here matters, as we read the
directories in this order, and we want to make sure that
sysv_start_priority is known when we first load the
unit. And that value we only know from S links. Hence
UP must be read before DOWN */
};
#define RUNLEVELS_UP "12345"
#endif
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;
#ifdef HAVE_SYSV_COMPAT
s->sysv_start_priority = -1;
s->sysv_start_priority_from_rcnd = -1;
#endif
s->socket_fd = -1;
s->guess_main_pid = true;
exec_context_init(&s->exec_context);
kill_context_init(&s->kill_context);
cgroup_context_init(&s->cgroup_context);
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 %lu which is not our child. We'll most likely not notice when it exits.",
UNIT(s)->id, (unsigned long) 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;
close_nointr_nofail(s->socket_fd);
s->socket_fd = -1;
}
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_monotonic(UNIT(s)->manager->event, s->watchdog_timestamp.monotonic + s->watchdog_usec, 0, service_dispatch_watchdog, s, &s->watchdog_event_source);
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;
#ifdef HAVE_SYSV_COMPAT
free(s->sysv_runlevels);
s->sysv_runlevels = NULL;
#endif
free(s->status_text);
s->status_text = NULL;
cgroup_context_done(&s->cgroup_context);
exec_context_done(&s->exec_context);
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;
set_free(s->restart_ignore_status.code);
s->restart_ignore_status.code = NULL;
set_free(s->restart_ignore_status.signal);
s->restart_ignore_status.signal = NULL;
set_free(s->success_status.code);
s->success_status.code = NULL;
set_free(s->success_status.signal);
s->success_status.signal = NULL;
/* 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_monotonic(UNIT(s)->manager->event, now(CLOCK_MONOTONIC) + usec, 0, service_dispatch_timer, s, &s->timer_event_source);
}
#ifdef HAVE_SYSV_COMPAT
static char *sysv_translate_name(const char *name) {
char *r;
r = new(char, strlen(name) + sizeof(".service"));
if (!r)
return NULL;
if (endswith(name, ".sh"))
/* Drop .sh suffix */
strcpy(stpcpy(r, name) - 3, ".service");
else
/* Normal init script name */
strcpy(stpcpy(r, name), ".service");
return r;
}
static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
/* We silently ignore the $ prefix here. According to the LSB
* spec it simply indicates whether something is a
* standardized name or a distribution-specific one. Since we
* just follow what already exists and do not introduce new
* uses or names we don't care who introduced a new name. */
static const char * const table[] = {
/* LSB defined facilities */
"local_fs", NULL,
"network", SPECIAL_NETWORK_TARGET,
"named", SPECIAL_NSS_LOOKUP_TARGET,
"portmap", SPECIAL_RPCBIND_TARGET,
"remote_fs", SPECIAL_REMOTE_FS_TARGET,
"syslog", NULL,
"time", SPECIAL_TIME_SYNC_TARGET,
};
unsigned i;
char *r;
const char *n;
assert(name);
assert(_r);
n = *name == '$' ? name + 1 : name;
for (i = 0; i < ELEMENTSOF(table); i += 2) {
if (!streq(table[i], n))
continue;
if (!table[i+1])
return 0;
r = strdup(table[i+1]);
if (!r)
return log_oom();
goto finish;
}
/* If we don't know this name, fallback heuristics to figure
* out whether something is a target or a service alias. */
if (*name == '$') {
if (!unit_prefix_is_valid(n))
return -EINVAL;
/* Facilities starting with $ are most likely targets */
r = unit_name_build(n, NULL, ".target");
} else if (filename && streq(name, filename))
/* Names equaling the file name of the services are redundant */
return 0;
else
/* Everything else we assume to be normal service names */
r = sysv_translate_name(n);
if (!r)
return -ENOMEM;
finish:
*_r = r;
return 1;
}
static int sysv_fix_order(Service *s) {
Unit *other;
int r;
assert(s);
if (s->sysv_start_priority < 0)
return 0;
/* For each pair of services where at least one lacks a LSB
* header, we use the start priority value to order things. */
LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
Service *t;
UnitDependency d;
bool special_s, special_t;
t = SERVICE(other);
if (s == t)
continue;
if (UNIT(t)->load_state != UNIT_LOADED)
continue;
if (t->sysv_start_priority < 0)
continue;
/* If both units have modern headers we don't care
* about the priorities */
if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
(UNIT(t)->fragment_path || t->sysv_has_lsb))
continue;
special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
if (special_t && !special_s)
d = UNIT_AFTER;
else if (special_s && !special_t)
d = UNIT_BEFORE;
else if (t->sysv_start_priority < s->sysv_start_priority)
d = UNIT_AFTER;
else if (t->sysv_start_priority > s->sysv_start_priority)
d = UNIT_BEFORE;
else
continue;
/* FIXME: Maybe we should compare the name here lexicographically? */
if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
return r;
}
return 0;
}
static ExecCommand *exec_command_new(const char *path, const char *arg1) {
ExecCommand *c;
if (!(c = new0(ExecCommand, 1)))
return NULL;
if (!(c->path = strdup(path))) {
free(c);
return NULL;
}
if (!(c->argv = strv_new(path, arg1, NULL))) {
free(c->path);
free(c);
return NULL;
}
return c;
}
static int sysv_exec_commands(Service *s, const bool supports_reload) {
ExecCommand *c;
assert(s);
assert(s->is_sysv);
assert(UNIT(s)->source_path);
c = exec_command_new(UNIT(s)->source_path, "start");
if (!c)
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
c = exec_command_new(UNIT(s)->source_path, "stop");
if (!c)
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
if (supports_reload) {
c = exec_command_new(UNIT(s)->source_path, "reload");
if (!c)
return -ENOMEM;
exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
}
return 0;
}
static bool usage_contains_reload(const char *line) {
return (strcasestr(line, "{reload|") ||
strcasestr(line, "{reload}") ||
strcasestr(line, "{reload\"") ||
strcasestr(line, "|reload|") ||
strcasestr(line, "|reload}") ||
strcasestr(line, "|reload\""));
}
static int service_load_sysv_path(Service *s, const char *path) {
FILE *f;
Unit *u;
unsigned line = 0;
int r;
enum {
NORMAL,
DESCRIPTION,
LSB,
LSB_DESCRIPTION,
USAGE_CONTINUATION
} state = NORMAL;
char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
struct stat st;
bool supports_reload = false;
assert(s);
assert(path);
u = UNIT(s);
f = fopen(path, "re");
if (!f) {
r = errno == ENOENT ? 0 : -errno;
goto finish;
}
if (fstat(fileno(f), &st) < 0) {
r = -errno;
goto finish;
}
free(u->source_path);
u->source_path = strdup(path);
if (!u->source_path) {
r = -ENOMEM;
goto finish;
}
u->source_mtime = timespec_load(&st.st_mtim);
if (null_or_empty(&st)) {
u->load_state = UNIT_MASKED;
r = 0;
goto finish;
}
s->is_sysv = true;
while (!feof(f)) {
char l[LINE_MAX], *t;
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
r = -errno;
log_error_unit(u->id,
"Failed to read configuration file '%s': %s",
path, strerror(-r));
goto finish;
}
line++;
t = strstrip(l);
if (*t != '#') {
/* Try to figure out whether this init script supports
* the reload operation. This heuristic looks for
* "Usage" lines which include the reload option. */
if ( state == USAGE_CONTINUATION ||
(state == NORMAL && strcasestr(t, "usage"))) {
if (usage_contains_reload(t)) {
supports_reload = true;
state = NORMAL;
} else if (t[strlen(t)-1] == '\\')
state = USAGE_CONTINUATION;
else
state = NORMAL;
}
continue;
}
if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
state = LSB;
s->sysv_has_lsb = true;
continue;
}
if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
state = NORMAL;
continue;
}
t++;
t += strspn(t, WHITESPACE);
if (state == NORMAL) {
/* Try to parse Red Hat style chkconfig headers */
if (startswith_no_case(t, "chkconfig:")) {
int start_priority;
char runlevels[16], *k;
state = NORMAL;
if (sscanf(t+10, "%15s %i %*i",
runlevels,
&start_priority) != 2) {
log_warning_unit(u->id,
"[%s:%u] Failed to parse chkconfig line. Ignoring.",
path, line);
continue;
}
/* A start priority gathered from the
* symlink farms is preferred over the
* data from the LSB header. */
if (start_priority < 0 || start_priority > 99)
log_warning_unit(u->id,
"[%s:%u] Start priority out of range. Ignoring.",
path, line);
else
s->sysv_start_priority = start_priority;
char_array_0(runlevels);
k = delete_chars(runlevels, WHITESPACE "-");
if (k[0]) {
char *d;
if (!(d = strdup(k))) {
r = -ENOMEM;
goto finish;
}
free(s->sysv_runlevels);
s->sysv_runlevels = d;
}
} else if (startswith_no_case(t, "description:")) {
size_t k = strlen(t);
char *d;
const char *j;
if (t[k-1] == '\\') {
state = DESCRIPTION;
t[k-1] = 0;
}
if ((j = strstrip(t+12)) && *j) {
if (!(d = strdup(j))) {
r = -ENOMEM;
goto finish;
}
} else
d = NULL;
free(chkconfig_description);
chkconfig_description = d;
} else if (startswith_no_case(t, "pidfile:")) {
char *fn;
state = NORMAL;
fn = strstrip(t+8);
if (!path_is_absolute(fn)) {
log_warning_unit(u->id,
"[%s:%u] PID file not absolute. Ignoring.",
path, line);
continue;
}
if (!(fn = strdup(fn))) {
r = -ENOMEM;
goto finish;
}
free(s->pid_file);
s->pid_file = fn;
}
} else if (state == DESCRIPTION) {
/* Try to parse Red Hat style description
* continuation */
size_t k = strlen(t);
char *j;
if (t[k-1] == '\\')
t[k-1] = 0;
else
state = NORMAL;
if ((j = strstrip(t)) && *j) {
char *d = NULL;
if (chkconfig_description)
d = strjoin(chkconfig_description, " ", j, NULL);
else
d = strdup(j);
if (!d) {
r = -ENOMEM;
goto finish;
}
free(chkconfig_description);
chkconfig_description = d;
}
} else if (state == LSB || state == LSB_DESCRIPTION) {
if (startswith_no_case(t, "Provides:")) {
char *i, *w;
size_t z;
state = LSB;
FOREACH_WORD_QUOTED(w, z, t+9, i) {
char *n, *m;
if (!(n = strndup(w, z))) {
r = -ENOMEM;
goto finish;
}
r = sysv_translate_facility(n, basename(path), &m);
free(n);
if (r < 0)
goto finish;
if (r == 0)
continue;
if (unit_name_to_type(m) == UNIT_SERVICE)
r = unit_merge_by_name(u, m);
else
/* NB: SysV targets
* which are provided
* by a service are
* pulled in by the
* services, as an
* indication that the
* generic service is
* now available. This
* is strictly
* one-way. The
* targets do NOT pull
* in the SysV
* services! */
r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
if (r < 0)
log_error_unit(u->id,
"[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
path, line, m, strerror(-r));
free(m);
}
} else if (startswith_no_case(t, "Required-Start:") ||
startswith_no_case(t, "Should-Start:") ||
startswith_no_case(t, "X-Start-Before:") ||
startswith_no_case(t, "X-Start-After:")) {
char *i, *w;
size_t z;
state = LSB;
FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
char *n, *m;
if (!(n = strndup(w, z))) {
r = -ENOMEM;
goto finish;
}
r = sysv_translate_facility(n, basename(path), &m);
if (r < 0) {
log_error_unit(u->id,
"[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
path, line, n, strerror(-r));
free(n);
continue;
}
free(n);
if (r == 0)
continue;
r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
if (r < 0)
log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
path, line, m, strerror(-r));
free(m);
}
} else if (startswith_no_case(t, "Default-Start:")) {
char *k, *d;
state = LSB;
k = delete_chars(t+14, WHITESPACE "-");
if (k[0] != 0) {
if (!(d = strdup(k))) {
r = -ENOMEM;
goto finish;
}
free(s->sysv_runlevels);
s->sysv_runlevels = d;
}
} else if (startswith_no_case(t, "Description:")) {
char *d, *j;
state = LSB_DESCRIPTION;
if ((j = strstrip(t+12)) && *j) {
if (!(d = strdup(j))) {
r = -ENOMEM;
goto finish;
}
} else
d = NULL;
free(long_description);
long_description = d;
} else if (startswith_no_case(t, "Short-Description:")) {
char *d, *j;
state = LSB;
if ((j = strstrip(t+18)) && *j) {
if (!(d = strdup(j))) {
r = -ENOMEM;
goto finish;
}
} else
d = NULL;
free(short_description);
short_description = d;
} else if (state == LSB_DESCRIPTION) {
if (startswith(l, "#\t") || startswith(l, "# ")) {
char *j;
if ((j = strstrip(t)) && *j) {
char *d = NULL;
if (long_description)
d = strjoin(long_description, " ", t, NULL);
else
d = strdup(j);
if (!d) {
r = -ENOMEM;
goto finish;
}
free(long_description);
long_description = d;
}
} else
state = LSB;
}
}
}
if ((r = sysv_exec_commands(s, supports_reload)) < 0)
goto finish;
if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
/* If there a runlevels configured for this service
* but none of the standard ones, then we assume this
* is some special kind of service (which might be
* needed for early boot) and don't create any links
* to it. */
UNIT(s)->default_dependencies = false;
/* Don't timeout special services during boot (like fsck) */
s->timeout_start_usec = 0;
s->timeout_stop_usec = 0;
} else {
s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
}
/* Special setting for all SysV services */
s->type = SERVICE_FORKING;
s->remain_after_exit = !s->pid_file;
s->guess_main_pid = false;
s->restart = SERVICE_RESTART_NO;
s->exec_context.ignore_sigpipe = false;
s->kill_context.kill_mode = KILL_PROCESS;
/* We use the long description only if
* no short description is set. */
if (short_description)
description = short_description;
else if (chkconfig_description)
description = chkconfig_description;
else if (long_description)
description = long_description;
else
description = NULL;
if (description) {
char *d;
if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
r = -ENOMEM;
goto finish;
}
u->description = d;
}
/* The priority that has been set in /etc/rcN.d/ hierarchies
* takes precedence over what is stored as default in the LSB
* header */
if (s->sysv_start_priority_from_rcnd >= 0)
s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
u->load_state = UNIT_LOADED;
r = 0;
finish:
if (f)
fclose(f);
free(short_description);
free(long_description);
free(chkconfig_description);
return r;
}
static int service_load_sysv_name(Service *s, const char *name) {
char **p;
assert(s);
assert(name);
/* For SysV services we strip the *.sh suffixes. */
if (endswith(name, ".sh.service"))
return -ENOENT;
STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
char *path;
int r;
path = strjoin(*p, "/", name, NULL);
if (!path)
return -ENOMEM;
assert(endswith(path, ".service"));
path[strlen(path)-8] = 0;
r = service_load_sysv_path(s, path);
if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
/* Try *.sh source'able init scripts */
strcat(path, ".sh");
r = service_load_sysv_path(s, path);
}
free(path);
if (r < 0)
return r;
if (UNIT(s)->load_state != UNIT_STUB)
break;
}
return 0;
}
static int service_load_sysv(Service *s) {
const char *t;
Iterator i;
int r;
assert(s);
/* Load service data from SysV init scripts, preferably with
* LSB headers ... */
if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
return 0;
if ((t = UNIT(s)->id))
if ((r = service_load_sysv_name(s, t)) < 0)
return r;
if (UNIT(s)->load_state == UNIT_STUB)
SET_FOREACH(t, UNIT(s)->names, i) {
if (t == UNIT(s)->id)
continue;
if ((r = service_load_sysv_name(s, t)) < 0)
return r;
if (UNIT(s)->load_state != UNIT_STUB)
break;
}
return 0;
}
#endif
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_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) {
log_error_unit(UNIT(s)->id,
"%s has PAM enabled. Kill mode must be set to 'control-group'. 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 */
if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
SPECIAL_BASIC_TARGET, NULL, true);
if (r < 0)
return r;
} else if (UNIT(s)->manager->running_as == SYSTEMD_USER) {
r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
SPECIAL_SOCKETS_TARGET, NULL, true);
if (r < 0)
return r;
r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
SPECIAL_TIMERS_TARGET, NULL, true);
if (r < 0)
return r;
r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
SPECIAL_PATHS_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;
#ifdef HAVE_SYSV_COMPAT
/* Load a classic init script as a fallback, if we couldn't find anything */
if (u->load_state == UNIT_STUB) {
r = service_load_sysv(s);
if (r < 0)
return r;
}
#endif
/* 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_add_exec_dependencies(u, &s->exec_context);
if (r < 0)
return r;
r = unit_add_default_slice(u);
if (r < 0)
return r;
#ifdef HAVE_SYSV_COMPAT
r = sysv_fix_order(s);
if (r < 0)
return r;
#endif
if (s->bus_name) {
r = unit_watch_bus_name(u, s->bus_name);
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->type == SERVICE_DBUS || s->bus_name) {
r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES,
SPECIAL_DBUS_SOCKET, NULL, true);
if (r < 0)
return r;
}
if (UNIT(s)->default_dependencies) {
r = service_add_default_dependencies(s);
if (r < 0)
return r;
}
r = unit_exec_context_defaults(u, &s->exec_context);
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: %lu\n",
prefix, (unsigned long) s->control_pid);
if (s->main_pid > 0)
fprintf(f,
"%sMain PID: %lu\n"
"%sMain PID Known: %s\n"
"%sMain PID Alien: %s\n",
prefix, (unsigned long) 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->is_sysv)
fprintf(f,
"%sSysV Init Script has LSB Header: %s\n"
"%sSysVEnabled: %s\n",
prefix, yes_no(s->sysv_has_lsb),
prefix, yes_no(s->sysv_enabled));
if (s->sysv_start_priority >= 0)
fprintf(f,
"%sSysVStartPriority: %i\n",
prefix, s->sysv_start_priority);
if (s->sysv_runlevels)
fprintf(f, "%sSysVRunLevels: %s\n",
prefix, s->sysv_runlevels);
#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 (kill(pid, 0) < 0 && errno != EPERM) {
if (may_warn)
log_info_unit(UNIT(s)->id,
"PID %lu read from file %s does not exist.",
(unsigned long) 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: %lu -> %lu",
(unsigned long) s->main_pid, (unsigned long) pid);
service_unwatch_main_pid(s);
s->main_pid_known = false;
} else
log_debug_unit(UNIT(s)->id,
"Main PID loaded: %lu", (unsigned long) 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 %lu from service %s",
(unsigned long) 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: %lu", (unsigned long) 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 %lu from service %s",
(unsigned long) pid, UNIT(s)->id);
return r;
return 0;
}
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_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_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 (s->deserialized_state == SERVICE_START_PRE ||
s->deserialized_state == SERVICE_START ||
s->deserialized_state == SERVICE_START_POST ||
s->deserialized_state == SERVICE_RELOAD ||
s->deserialized_state == SERVICE_STOP ||
s->deserialized_state == SERVICE_STOP_SIGTERM ||
s->deserialized_state == SERVICE_STOP_SIGKILL ||
s->deserialized_state == SERVICE_STOP_POST ||
s->deserialized_state == SERVICE_FINAL_SIGTERM ||
s->deserialized_state == SERVICE_FINAL_SIGKILL) {
usec_t k;
k = s->deserialized_state == SERVICE_START_PRE || s->deserialized_state == SERVICE_START ||
s->deserialized_state == SERVICE_START_POST || s->deserialized_state == 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 ((s->deserialized_state == SERVICE_START &&
(s->type == SERVICE_FORKING ||
s->type == SERVICE_DBUS ||
s->type == SERVICE_ONESHOT ||
s->type == SERVICE_NOTIFY)) ||
s->deserialized_state == SERVICE_START_POST ||
s->deserialized_state == SERVICE_RUNNING ||
s->deserialized_state == SERVICE_RELOAD ||
s->deserialized_state == SERVICE_STOP ||
s->deserialized_state == SERVICE_STOP_SIGTERM ||
s->deserialized_state == SERVICE_STOP_SIGKILL)
if (s->main_pid > 0) {
r = unit_watch_pid(UNIT(s), s->main_pid);
if (r < 0)
return r;
}
if (s->deserialized_state == SERVICE_START_PRE ||
s->deserialized_state == SERVICE_START ||
s->deserialized_state == SERVICE_START_POST ||
s->deserialized_state == SERVICE_RELOAD ||
s->deserialized_state == SERVICE_STOP ||
s->deserialized_state == SERVICE_STOP_SIGTERM ||
s->deserialized_state == SERVICE_STOP_SIGKILL ||
s->deserialized_state == SERVICE_STOP_POST ||
s->deserialized_state == SERVICE_FINAL_SIGTERM ||
s->deserialized_state == SERVICE_FINAL_SIGKILL)
if (s->control_pid > 0) {
r = unit_watch_pid(UNIT(s), s->control_pid);
if (r < 0)
return r;
}
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*, 5);
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=%lu", (unsigned long) s->main_pid) < 0) {
r = -ENOMEM;
goto fail;
}
if (s->watchdog_usec > 0)
if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
r = -ENOMEM;
goto fail;
}
if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
if (asprintf(our_env + n_env++, "MANAGERPID=%lu", (unsigned long) 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,
UNIT(s)->id,
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)
s->timer_event_source = sd_event_source_unref(s->timer_event_source);
return r;
}
static int main_pid_good(Service *s) {
assert(s);
/* Returns 0 if the pid is dead, 1 if it is good, -1 if we
* don't know */
/* If we know the pid file, then lets just check if it is
* still valid */
if (s->main_pid_known) {
/* If it's an alien child let's check if it is still
* alive ... */
if (s->main_pid_alien && s->main_pid > 0)
return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
/* .. otherwise assume we'll get a SIGCHLD for it,
* which we really should wait for to collect exit
* status and code */
return s->main_pid > 0;
}
/* We don't know the pid */
return -EAGAIN;
}
_pure_ static int control_pid_good(Service *s) {
assert(s);
return s->control_pid > 0;
}
static int cgroup_good(Service *s) {
int r;
assert(s);
if (!UNIT(s)->cgroup_path)
return 0;
r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
if (r < 0)
return r;
return !r;
}
static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
int r;
assert(s);
if (f != SERVICE_SUCCESS)
s->result = f;
service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
if (allow_restart &&
!s->forbid_restart &&
(s->restart == SERVICE_RESTART_ALWAYS ||
(s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
(s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
(s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
(s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
s->result == SERVICE_FAILURE_CORE_DUMP))) &&
(s->result != SERVICE_FAILURE_EXIT_CODE ||
!set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
(s->result != SERVICE_FAILURE_SIGNAL ||
!set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
r = service_arm_timer(s, s->restart_usec);
if (r < 0)
goto fail;
service_set_state(s, SERVICE_AUTO_RESTART);
}
s->forbid_restart = false;
/* we want fresh tmpdirs in case service is started again immediately */
exec_runtime_destroy(s->exec_runtime);
s->exec_runtime = exec_runtime_unref(s->exec_runtime);
/* Try to delete the pid file. At this point it will be
* out-of-date, and some software might be confused by it, so
* let's remove it. */
if (s->pid_file)
unlink_noerrno(s->pid_file);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run install restart timer: %s",
UNIT(s)->id, strerror(-r));
service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
}
static void service_enter_stop_post(Service *s, ServiceResult f) {
int r;
assert(s);
if (f != SERVICE_SUCCESS)
s->result = f;
service_unwatch_control_pid(s);
s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
if (s->control_command) {
s->control_command_id = SERVICE_EXEC_STOP_POST;
r = service_spawn(s,
s->control_command,
true,
false,
!s->permissions_start_only,
!s->root_directory_start_only,
true,
false,
true,
&s->control_pid);
if (r < 0)
goto fail;
service_set_state(s, SERVICE_STOP_POST);
} else
service_enter_dead(s, SERVICE_SUCCESS, true);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run 'stop-post' task: %s",
UNIT(s)->id, strerror(-r));
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
}
static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
int r;
assert(s);
if (f != SERVICE_SUCCESS)
s->result = f;
r = unit_kill_context(
UNIT(s),
&s->kill_context,
state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
s->main_pid,
s->control_pid,
s->main_pid_alien);
if (r < 0)
goto fail;
if (r > 0) {
if (s->timeout_stop_usec > 0) {
r = service_arm_timer(s, s->timeout_stop_usec);
if (r < 0)
goto fail;
}
service_set_state(s, state);
} else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
service_enter_stop_post(s, SERVICE_SUCCESS);
else
service_enter_dead(s, SERVICE_SUCCESS, true);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
else
service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
}
static void service_enter_stop(Service *s, ServiceResult f) {
int r;
assert(s);
if (f != SERVICE_SUCCESS)
s->result = f;
service_unwatch_control_pid(s);
s->control_command = s->exec_command[SERVICE_EXEC_STOP];
if (s->control_command) {
s->control_command_id = SERVICE_EXEC_STOP;
r = service_spawn(s,
s->control_command,
true,
false,
!s->permissions_start_only,
!s->root_directory_start_only,
false,
false,
true,
&s->control_pid);
if (r < 0)
goto fail;
service_set_state(s, SERVICE_STOP);
} else
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
}
static void service_enter_running(Service *s, ServiceResult f) {
int main_pid_ok, cgroup_ok;
assert(s);
if (f != SERVICE_SUCCESS)
s->result = f;
main_pid_ok = main_pid_good(s);
cgroup_ok = cgroup_good(s);
if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
(s->bus_name_good || s->type != SERVICE_DBUS))
service_set_state(s, SERVICE_RUNNING);
else if (s->remain_after_exit)
service_set_state(s, SERVICE_EXITED);
else
service_enter_stop(s, SERVICE_SUCCESS);
}
static void service_enter_start_post(Service *s) {
int r;
assert(s);
service_unwatch_control_pid(s);
service_reset_watchdog(s);
s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
if (s->control_command) {
s->control_command_id = SERVICE_EXEC_START_POST;
r = service_spawn(s,
s->control_command,
true,
false,
!s->permissions_start_only,
!s->root_directory_start_only,
false,
false,
true,
&s->control_pid);
if (r < 0)
goto fail;
service_set_state(s, SERVICE_START_POST);
} else
service_enter_running(s, SERVICE_SUCCESS);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
}
static void service_kill_control_processes(Service *s) {
char *p;
if (!UNIT(s)->cgroup_path)
return;
p = strappenda(UNIT(s)->cgroup_path, "/control");
cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
}
static void service_enter_start(Service *s) {
ExecCommand *c;
pid_t pid;
int r;
assert(s);
assert(s->exec_command[SERVICE_EXEC_START]);
assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
service_unwatch_control_pid(s);
service_unwatch_main_pid(s);
/* We want to ensure that nobody leaks processes from
* START_PRE here, so let's go on a killing spree, People
* should not spawn long running processes from START_PRE. */
service_kill_control_processes(s);
if (s->type == SERVICE_FORKING) {
s->control_command_id = SERVICE_EXEC_START;
c = s->control_command = s->exec_command[SERVICE_EXEC_START];
s->main_command = NULL;
} else {
s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
s->control_command = NULL;
c = s->main_command = s->exec_command[SERVICE_EXEC_START];
}
r = service_spawn(s,
c,
s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
true,
true,
true,
true,
s->notify_access != NOTIFY_NONE,
false,
&pid);
if (r < 0)
goto fail;
if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
/* For simple services we immediately start
* the START_POST binaries. */
service_set_main_pid(s, pid);
service_enter_start_post(s);
} else if (s->type == SERVICE_FORKING) {
/* For forking services we wait until the start
* process exited. */
s->control_pid = pid;
service_set_state(s, SERVICE_START);
} else if (s->type == SERVICE_ONESHOT ||
s->type == SERVICE_DBUS ||
s->type == SERVICE_NOTIFY) {
/* For oneshot services we wait until the start
* process exited, too, but it is our main process. */
/* For D-Bus services we know the main pid right away,
* but wait for the bus name to appear on the
* bus. Notify services are similar. */
service_set_main_pid(s, pid);
service_set_state(s, SERVICE_START);
} else
assert_not_reached("Unknown service type");
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
}
static void service_enter_start_pre(Service *s) {
int r;
assert(s);
service_unwatch_control_pid(s);
s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
if (s->control_command) {
/* Before we start anything, let's clear up what might
* be left from previous runs. */
service_kill_control_processes(s);
s->control_command_id = SERVICE_EXEC_START_PRE;
r = service_spawn(s,
s->control_command,
true,
false,
!s->permissions_start_only,
!s->root_directory_start_only,
true,
false,
true,
&s->control_pid);
if (r < 0)
goto fail;
service_set_state(s, SERVICE_START_PRE);
} else
service_enter_start(s);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
}
static void service_enter_restart(Service *s) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(s);
if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
/* Don't restart things if we are going down anyway */
log_info_unit(UNIT(s)->id,
"Stop job pending for unit, delaying automatic restart.");
r = service_arm_timer(s, s->restart_usec);
if (r < 0)
goto fail;
return;
}
/* Any units that are bound to this service must also be
* restarted. We use JOB_RESTART (instead of the more obvious
* JOB_START) here so that those dependency jobs will be added
* as well. */
r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
if (r < 0)
goto fail;
/* Note that we stay in the SERVICE_AUTO_RESTART state here,
* it will be canceled as part of the service_stop() call that
* is executed as part of JOB_RESTART. */
log_debug_unit(UNIT(s)->id,
"%s scheduled restart job.", UNIT(s)->id);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to schedule restart job: %s",
UNIT(s)->id, bus_error_message(&error, -r));
service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
}
static void service_enter_reload(Service *s) {
int r;
assert(s);
service_unwatch_control_pid(s);
s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
if (s->control_command) {
s->control_command_id = SERVICE_EXEC_RELOAD;
r = service_spawn(s,
s->control_command,
true,
false,
!s->permissions_start_only,
!s->root_directory_start_only,
false,
false,
true,
&s->control_pid);
if (r < 0)
goto fail;
service_set_state(s, SERVICE_RELOAD);
} else
service_enter_running(s, SERVICE_SUCCESS);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run 'reload' task: %s",
UNIT(s)->id, strerror(-r));
s->reload_result = SERVICE_FAILURE_RESOURCES;
service_enter_running(s, SERVICE_SUCCESS);
}
static void service_run_next_control(Service *s) {
int r;
assert(s);
assert(s->control_command);
assert(s->control_command->command_next);
assert(s->control_command_id != SERVICE_EXEC_START);
s->control_command = s->control_command->command_next;
service_unwatch_control_pid(s);
r = service_spawn(s,
s->control_command,
true,
false,
!s->permissions_start_only,
!s->root_directory_start_only,
s->control_command_id == SERVICE_EXEC_START_PRE ||
s->control_command_id == SERVICE_EXEC_STOP_POST,
false,
true,
&s->control_pid);
if (r < 0)
goto fail;
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run next control task: %s",
UNIT(s)->id, strerror(-r));
if (s->state == SERVICE_START_PRE)
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
else if (s->state == SERVICE_STOP)
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
else if (s->state == SERVICE_STOP_POST)
service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
else if (s->state == SERVICE_RELOAD) {
s->reload_result = SERVICE_FAILURE_RESOURCES;
service_enter_running(s, SERVICE_SUCCESS);
} else
service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
}
static void service_run_next_main(Service *s) {
pid_t pid;
int r;
assert(s);
assert(s->main_command);
assert(s->main_command->command_next);
assert(s->type == SERVICE_ONESHOT);
s->main_command = s->main_command->command_next;
service_unwatch_main_pid(s);
r = service_spawn(s,
s->main_command,
true,
true,
true,
true,
true,
s->notify_access != NOTIFY_NONE,
false,
&pid);
if (r < 0)
goto fail;
service_set_main_pid(s, pid);
return;
fail:
log_warning_unit(UNIT(s)->id,
"%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
}
static int service_start_limit_test(Service *s) {
assert(s);
if (ratelimit_test(&s->start_limit))
return 0;
switch (s->start_limit_action) {
case SERVICE_START_LIMIT_NONE:
log_warning_unit(UNIT(s)->id,
"%s start request repeated too quickly, refusing to start.",
UNIT(s)->id);
break;
case SERVICE_START_LIMIT_REBOOT: {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
log_warning_unit(UNIT(s)->id,
"%s start request repeated too quickly, rebooting.", UNIT(s)->id);
r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
SPECIAL_REBOOT_TARGET, JOB_REPLACE,
true, &error, NULL);
if (r < 0)
log_error_unit(UNIT(s)->id,
"Failed to reboot: %s.", bus_error_message(&error, r));
break;
}
case SERVICE_START_LIMIT_REBOOT_FORCE:
log_warning_unit(UNIT(s)->id,
"%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
UNIT(s)->manager->exit_code = MANAGER_REBOOT;
break;
case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
log_warning_unit(UNIT(s)->id,
"%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
sync();
reboot(RB_AUTOBOOT);
break;
default:
log_error_unit(UNIT(s)->id,
"start limit action=%i", s->start_limit_action);
assert_not_reached("Unknown StartLimitAction.");
}
return -ECANCELED;
}
static int service_start(Unit *u) {
Service *s = SERVICE(u);
int r;
assert(s);
/* We cannot fulfill this request right now, try again later
* please! */
if (s->state == SERVICE_STOP ||
s->state == SERVICE_STOP_SIGTERM ||
s->state == SERVICE_STOP_SIGKILL ||
s->state == SERVICE_STOP_POST ||
s->state == SERVICE_FINAL_SIGTERM ||
s->state == SERVICE_FINAL_SIGKILL)
return -EAGAIN;
/* Already on it! */
if (s->state == SERVICE_START_PRE ||
s->state == SERVICE_START ||
s->state == SERVICE_START_POST)
return 0;
/* A service that will be restarted must be stopped first to
* trigger BindsTo and/or OnFailure dependencies. If a user
* does not want to wait for the holdoff time to elapse, the
* service should be manually restarted, not started. We
* simply return EAGAIN here, so that any start jobs stay
* queued, and assume that the auto restart timer will
* eventually trigger the restart. */
if (s->state == SERVICE_AUTO_RESTART)
return -EAGAIN;
assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
/* Make sure we don't enter a busy loop of some kind. */
r = service_start_limit_test(s);
if (r < 0) {
service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
return r;
}
s->result = SERVICE_SUCCESS;
s->reload_result = SERVICE_SUCCESS;
s->main_pid_known = false;
s->main_pid_alien = false;
s->forbid_restart = false;
service_enter_start_pre(s);
return 0;
}
static int service_stop(Unit *u) {
Service *s = SERVICE(u);
assert(s);
/* Don't create restart jobs from here. */
s->forbid_restart = true;
/* Already on it */
if (s->state == SERVICE_STOP ||
s->state == SERVICE_STOP_SIGTERM ||
s->state == SERVICE_STOP_SIGKILL ||
s->state == SERVICE_STOP_POST ||
s->state == SERVICE_FINAL_SIGTERM ||
s->state == SERVICE_FINAL_SIGKILL)
return 0;
/* A restart will be scheduled or is in progress. */
if (s->state == SERVICE_AUTO_RESTART) {
service_set_state(s, SERVICE_DEAD);
return 0;
}
/* If there's already something running we go directly into
* kill mode. */
if (s->state == SERVICE_START_PRE ||
s->state == SERVICE_START ||
s->state == SERVICE_START_POST ||
s->state == SERVICE_RELOAD) {
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
return 0;
}
assert(s->state == SERVICE_RUNNING ||
s->state == SERVICE_EXITED);
service_enter_stop(s, SERVICE_SUCCESS);
return 0;
}
static int service_reload(Unit *u) {
Service *s = SERVICE(u);
assert(s);
assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
service_enter_reload(s);
return 0;
}
_pure_ static bool service_can_reload(Unit *u) {
Service *s = SERVICE(u);
assert(s);
return !!s->exec_command[SERVICE_EXEC_RELOAD];
}
static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
Service *s = SERVICE(u);
assert(u);
assert(f);
assert(fds);
unit_serialize_item(u, f, "state", service_state_to_string(s->state));
unit_serialize_item(u, f, "result", service_result_to_string(s->result));
unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
if (s->control_pid > 0)
unit_serialize_item_format(u, f, "control-pid", "%lu",
(unsigned long) s->control_pid);
if (s->main_pid_known && s->main_pid > 0)
unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
if (s->status_text)
unit_serialize_item(u, f, "status-text", s->status_text);
/* FIXME: There's a minor uncleanliness here: if there are
* multiple commands attached here, we will start from the
* first one again */
if (s->control_command_id >= 0)
unit_serialize_item(u, f, "control-command",
service_exec_command_to_string(s->control_command_id));
if (s->socket_fd >= 0) {
int copy;
if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
return copy;
unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
}
if (s->main_exec_status.pid > 0) {
unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu",
(unsigned long) s->main_exec_status.pid);
dual_timestamp_serialize(f, "main-exec-status-start",
&s->main_exec_status.start_timestamp);
dual_timestamp_serialize(f, "main-exec-status-exit",
&s->main_exec_status.exit_timestamp);
if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
s->main_exec_status.code);
unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
s->main_exec_status.status);
}
}
if (dual_timestamp_is_set(&s->watchdog_timestamp))
dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
if (s->forbid_restart)
unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
return 0;
}
static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
Service *s = SERVICE(u);
assert(u);
assert(key);
assert(value);
assert(fds);
if (streq(key, "state")) {
ServiceState state;
state = service_state_from_string(value);
if (state < 0)
log_debug_unit(u->id, "Failed to parse state value %s", value);
else
s->deserialized_state = state;
} else if (streq(key, "result")) {
ServiceResult f;
f = service_result_from_string(value);
if (f < 0)
log_debug_unit(u->id, "Failed to parse result value %s", value);
else if (f != SERVICE_SUCCESS)
s->result = f;
} else if (streq(key, "reload-result")) {
ServiceResult f;
f = service_result_from_string(value);
if (f < 0)
log_debug_unit(u->id, "Failed to parse reload result value %s", value);
else if (f != SERVICE_SUCCESS)
s->reload_result = f;
} else if (streq(key, "control-pid")) {
pid_t pid;
if (parse_pid(value, &pid) < 0)
log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
else
s->control_pid = pid;
} else if (streq(key, "main-pid")) {
pid_t pid;
if (parse_pid(value, &pid) < 0)
log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
else {
service_set_main_pid(s, pid);
unit_watch_pid(UNIT(s), pid);
}
} else if (streq(key, "main-pid-known")) {
int b;
b = parse_boolean(value);
if (b < 0)
log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
else
s->main_pid_known = b;
} else if (streq(key, "status-text")) {
char *t;
t = strdup(value);
if (!t)
log_oom();
else {
free(s->status_text);
s->status_text = t;
}
} else if (streq(key, "control-command")) {
ServiceExecCommand id;
id = service_exec_command_from_string(value);
if (id < 0)
log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
else {
s->control_command_id = id;
s->control_command = s->exec_command[id];
}
} else if (streq(key, "socket-fd")) {
int fd;
if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
else {
if (s->socket_fd >= 0)
close_nointr_nofail(s->socket_fd);
s->socket_fd = fdset_remove(fds, fd);
}
} else if (streq(key, "main-exec-status-pid")) {
pid_t pid;
if (parse_pid(value, &pid) < 0)
log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
else
s->main_exec_status.pid = pid;
} else if (streq(key, "main-exec-status-code")) {
int i;
if (safe_atoi(value, &i) < 0)
log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
else
s->main_exec_status.code = i;
} else if (streq(key, "main-exec-status-status")) {
int i;
if (safe_atoi(value, &i) < 0)
log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
else
s->main_exec_status.status = i;
} else if (streq(key, "main-exec-status-start"))
dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
else if (streq(key, "main-exec-status-exit"))
dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
else if (streq(key, "watchdog-timestamp"))
dual_timestamp_deserialize(value, &s->watchdog_timestamp);
else if (streq(key, "forbid-restart")) {
int b;
b = parse_boolean(value);
if (b < 0)
log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
else
s->forbid_restart = b;
} else
log_debug_unit(u->id, "Unknown serialization key '%s'", key);
return 0;
}
_pure_ static UnitActiveState service_active_state(Unit *u) {
const UnitActiveState *table;
assert(u);
table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
return table[SERVICE(u)->state];
}
static const char *service_sub_state_to_string(Unit *u) {
assert(u);
return service_state_to_string(SERVICE(u)->state);
}
static bool service_check_gc(Unit *u) {
Service *s = SERVICE(u);
assert(s);
/* Never clean up services that still have a process around,
* even if the service is formally dead. */
if (cgroup_good(s) > 0 ||
main_pid_good(s) > 0 ||
control_pid_good(s) > 0)
return true;
#ifdef HAVE_SYSV_COMPAT
if (s->is_sysv)
return true;
#endif
return false;
}
_pure_ static bool service_check_snapshot(Unit *u) {
Service *s = SERVICE(u);
assert(s);
return (s->socket_fd < 0);
}
static int service_retry_pid_file(Service *s) {
int r;
assert(s->pid_file);
assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
r = service_load_pid_file(s, false);
if (r < 0)
return r;
service_unwatch_pid_file(s);
service_enter_running(s, SERVICE_SUCCESS);
return 0;
}
static int service_watch_pid_file(Service *s) {
int r;
log_debug_unit(UNIT(s)->id,
"Setting watch for %s's PID file %s",
UNIT(s)->id, s->pid_file_pathspec->path);
r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
if (r < 0)
goto fail;
/* the pidfile might have appeared just before we set the watch */
log_debug_unit(UNIT(s)->id,
"Trying to read %s's PID file %s in case it changed",
UNIT(s)->id, s->pid_file_pathspec->path);
service_retry_pid_file(s);
return 0;
fail:
log_error_unit(UNIT(s)->id,
"Failed to set a watch for %s's PID file %s: %s",
UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
service_unwatch_pid_file(s);
return r;
}
static int service_demand_pid_file(Service *s) {
PathSpec *ps;
assert(s->pid_file);
assert(!s->pid_file_pathspec);
ps = new0(PathSpec, 1);
if (!ps)
return -ENOMEM;
ps->unit = UNIT(s);
ps->path = strdup(s->pid_file);
if (!ps->path) {
free(ps);
return -ENOMEM;
}
path_kill_slashes(ps->path);
/* PATH_CHANGED would not be enough. There are daemons (sendmail) that
* keep their PID file open all the time. */
ps->type = PATH_MODIFIED;
ps->inotify_fd = -1;
s->pid_file_pathspec = ps;
return service_watch_pid_file(s);
}
static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
PathSpec *p = userdata;
Service *s;
assert(p);
s = SERVICE(p->unit);
assert(s);
assert(fd >= 0);
assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
assert(s->pid_file_pathspec);
assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
log_debug_unit(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
if (path_spec_fd_event(p, events) < 0)
goto fail;
if (service_retry_pid_file(s) == 0)
return 0;
if (service_watch_pid_file(s) < 0)
goto fail;
return 0;
fail:
service_unwatch_pid_file(s);
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
return 0;
}
static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
Service *s = SERVICE(u);
ServiceResult f;
assert(s);
assert(pid >= 0);
if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
is_clean_exit_lsb(code, status, &s->success_status))
f = SERVICE_SUCCESS;
else if (code == CLD_EXITED)
f = SERVICE_FAILURE_EXIT_CODE;
else if (code == CLD_KILLED)
f = SERVICE_FAILURE_SIGNAL;
else if (code == CLD_DUMPED)
f = SERVICE_FAILURE_CORE_DUMP;
else
assert_not_reached("Unknown code");
if (s->main_pid == pid) {
/* Forking services may occasionally move to a new PID.
* As long as they update the PID file before exiting the old
* PID, they're fine. */
if (service_load_pid_file(s, false) == 0)
return;
s->main_pid = 0;
exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
if (s->main_command) {
/* If this is not a forking service than the
* main process got started and hence we copy
* the exit status so that it is recorded both
* as main and as control process exit
* status */
s->main_command->exec_status = s->main_exec_status;
if (s->main_command->ignore)
f = SERVICE_SUCCESS;
} else if (s->exec_command[SERVICE_EXEC_START]) {
/* If this is a forked process, then we should
* ignore the return value if this was
* configured for the starter process */
if (s->exec_command[SERVICE_EXEC_START]->ignore)
f = SERVICE_SUCCESS;
}
log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
u->id,
"MESSAGE=%s: main process exited, code=%s, status=%i/%s",
u->id, sigchld_code_to_string(code), status,
strna(code == CLD_EXITED
? exit_status_to_string(status, EXIT_STATUS_FULL)
: signal_to_string(status)),
"EXIT_CODE=%s", sigchld_code_to_string(code),
"EXIT_STATUS=%i", status,
NULL);
if (f != SERVICE_SUCCESS)
s->result = f;
if (s->main_command &&
s->main_command->command_next &&
f == SERVICE_SUCCESS) {
/* There is another command to *
* execute, so let's do that. */
log_debug_unit(u->id,
"%s running next main command for state %s",
u->id, service_state_to_string(s->state));
service_run_next_main(s);
} else {
/* The service exited, so the service is officially
* gone. */
s->main_command = NULL;
switch (s->state) {
case SERVICE_START_POST:
case SERVICE_RELOAD:
case SERVICE_STOP:
/* Need to wait until the operation is
* done */
break;
case SERVICE_START:
if (s->type == SERVICE_ONESHOT) {
/* This was our main goal, so let's go on */
if (f == SERVICE_SUCCESS)
service_enter_start_post(s);
else
service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
break;
}
/* Fall through */
case SERVICE_RUNNING:
service_enter_running(s, f);
break;
case SERVICE_STOP_SIGTERM:
case SERVICE_STOP_SIGKILL:
if (!control_pid_good(s))
service_enter_stop_post(s, f);
/* If there is still a control process, wait for that first */
break;
default:
assert_not_reached("Uh, main process died at wrong time.");
}
}
} else if (s->control_pid == pid) {
s->control_pid = 0;
if (s->control_command) {
exec_status_exit(&s->control_command->exec_status,
&s->exec_context, pid, code, status);
if (s->control_command->ignore)
f = SERVICE_SUCCESS;
}
log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
"%s: control process exited, code=%s status=%i",
u->id, sigchld_code_to_string(code), status);
if (f != SERVICE_SUCCESS)
s->result = f;
/* Immediately get rid of the cgroup, so that the
* kernel doesn't delay the cgroup empty messages for
* the service cgroup any longer than necessary */
service_kill_control_processes(s);
if (s->control_command &&
s->control_command->command_next &&
f == SERVICE_SUCCESS) {
/* There is another command to *
* execute, so let's do that. */
log_debug_unit(u->id,
"%s running next control command for state %s",
u->id, service_state_to_string(s->state));
service_run_next_control(s);
} else {
/* No further commands for this step, so let's
* figure out what to do next */
s->control_command = NULL;
s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
log_debug_unit(u->id,
"%s got final SIGCHLD for state %s",
u->id, service_state_to_string(s->state));
switch (s->state) {
case SERVICE_START_PRE:
if (f == SERVICE_SUCCESS)
service_enter_start(s);
else
service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
break;
case SERVICE_START:
if (s->type != SERVICE_FORKING)
/* Maybe spurious event due to a reload that changed the type? */
break;
if (f != SERVICE_SUCCESS) {
service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
break;
}
if (s->pid_file) {
bool has_start_post;
int r;
/* Let's try to load the pid file here if we can.
* The PID file might actually be created by a START_POST
* script. In that case don't worry if the loading fails. */
has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
r = service_load_pid_file(s, !has_start_post);
if (!has_start_post && r < 0) {
r = service_demand_pid_file(s);
if (r < 0 || !cgroup_good(s))
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
break;
}
} else
service_search_main_pid(s);
service_enter_start_post(s);
break;
case SERVICE_START_POST:
if (f != SERVICE_SUCCESS) {
service_enter_stop(s, f);
break;
}
if (s->pid_file) {
int r;
r = service_load_pid_file(s, true);
if (r < 0) {
r = service_demand_pid_file(s);
if (r < 0 || !cgroup_good(s))
service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
break;
}
} else
service_search_main_pid(s);
service_enter_running(s, SERVICE_SUCCESS);
break;
case SERVICE_RELOAD:
if (f == SERVICE_SUCCESS) {
service_load_pid_file(s, true);
service_search_main_pid(s);
}
s->reload_result = f;
service_enter_running(s, SERVICE_SUCCESS);
break;
case SERVICE_STOP:
service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
break;
case SERVICE_STOP_SIGTERM:
case SERVICE_STOP_SIGKILL:
if (main_pid_good(s) <= 0)
service_enter_stop_post(s, f);
/* If there is still a service
* process around, wait until
* that one quit, too */
break;
case SERVICE_STOP_POST:
case SERVICE_FINAL_SIGTERM:
case SERVICE_FINAL_SIGKILL:
service_enter_dead(s, f, true);
break;
default:
assert_not_reached("Uh, control process died at wrong time.");
}
}
}
/* Notify clients about changed exit status */
unit_add_to_dbus_queue(u);
}
static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
Service *s = SERVICE(userdata);
assert(s);
assert(source == s->timer_event_source);
switch (s->state) {
case SERVICE_START_PRE:
case SERVICE_START:
log_warning_unit(UNIT(s)->id,
"%s operation timed out. Terminating.", UNIT(s)->id);
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
break;
case SERVICE_START_POST:
log_warning_unit(UNIT(s)->id,
"%s operation timed out. Stopping.", UNIT(s)->id);
service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
break;
case SERVICE_RELOAD:
log_warning_unit(UNIT(s)->id,
"%s operation timed out. Stopping.", UNIT(s)->id);
s->reload_result = SERVICE_FAILURE_TIMEOUT;
service_enter_running(s, SERVICE_SUCCESS);
break;
case SERVICE_STOP:
log_warning_unit(UNIT(s)->id,
"%s stopping timed out. Terminating.", UNIT(s)->id);
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
break;
case SERVICE_STOP_SIGTERM:
if (s->kill_context.send_sigkill) {
log_warning_unit(UNIT(s)->id,
"%s stopping timed out. Killing.", UNIT(s)->id);
service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
} else {
log_warning_unit(UNIT(s)->id,
"%s stopping timed out. Skipping SIGKILL.", UNIT(s)->id);
service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
}
break;
case SERVICE_STOP_SIGKILL:
/* Uh, we sent a SIGKILL and it is still not gone?
* Must be something we cannot kill, so let's just be
* weirded out and continue */
log_warning_unit(UNIT(s)->id,
"%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
break;
case SERVICE_STOP_POST:
log_warning_unit(UNIT(s)->id,
"%s stopping timed out (2). Terminating.", UNIT(s)->id);
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
break;
case SERVICE_FINAL_SIGTERM:
if (s->kill_context.send_sigkill) {
log_warning_unit(UNIT(s)->id,
"%s stopping timed out (2). Killing.", UNIT(s)->id);
service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
} else {
log_warning_unit(UNIT(s)->id,
"%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.",
UNIT(s)->id);
service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
}
break;
case SERVICE_FINAL_SIGKILL:
log_warning_unit(UNIT(s)->id,
"%s still around after SIGKILL (2). Entering failed mode.", UNIT(s)->id);
service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
break;
case SERVICE_AUTO_RESTART:
log_info_unit(UNIT(s)->id,
"%s holdoff time over, scheduling restart.", UNIT(s)->id);
service_enter_restart(s);
break;
default:
assert_not_reached("Timeout at wrong time.");
}
return 0;
}
static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
Service *s = SERVICE(userdata);
assert(s);
assert(source == s->watchdog_event_source);
log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_WATCHDOG);
return 0;
}
static void service_notify_cgroup_empty_event(Unit *u) {
Service *s = SERVICE(u);
assert(u);
log_debug_unit(u->id, "%s: cgroup is empty", u->id);
switch (s->state) {
/* Waiting for SIGCHLD is usually more interesting,
* because it includes return codes/signals. Which is
* why we ignore the cgroup events for most cases,
* except when we don't know pid which to expect the
* SIGCHLD for. */
case SERVICE_START:
case SERVICE_START_POST:
/* If we were hoping for the daemon to write its PID file,
* we can give up now. */
if (s->pid_file_pathspec) {
log_warning_unit(u->id,
"%s never wrote its PID file. Failing.", UNIT(s)->id);
service_unwatch_pid_file(s);
if (s->state == SERVICE_START)
service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
else
service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
}
break;
case SERVICE_RUNNING:
/* service_enter_running() will figure out what to do */
service_enter_running(s, SERVICE_SUCCESS);
break;
case SERVICE_STOP_SIGTERM:
case SERVICE_STOP_SIGKILL:
if (main_pid_good(s) <= 0 && !control_pid_good(s))
service_enter_stop_post(s, SERVICE_SUCCESS);
break;
case SERVICE_FINAL_SIGTERM:
case SERVICE_FINAL_SIGKILL:
if (main_pid_good(s) <= 0 && !control_pid_good(s))
service_enter_dead(s, SERVICE_SUCCESS, true);
break;
default:
;
}
}
static void service_notify_message(Unit *u, pid_t pid, char **tags) {
Service *s = SERVICE(u);
const char *e;
assert(u);
if (s->notify_access == NOTIFY_NONE) {
log_warning_unit(u->id,
"%s: Got notification message from PID %lu, but reception is disabled.",
u->id, (unsigned long) pid);
return;
}
if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
log_warning_unit(u->id,
"%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
u->id, (unsigned long) pid, (unsigned long) s->main_pid);
return;
}
log_debug_unit(u->id,
"%s: Got message", u->id);
/* Interpret MAINPID= */
if ((e = strv_find_prefix(tags, "MAINPID=")) &&
(s->state == SERVICE_START ||
s->state == SERVICE_START_POST ||
s->state == SERVICE_RUNNING ||
s->state == SERVICE_RELOAD)) {
if (parse_pid(e + 8, &pid) < 0)
log_warning_unit(u->id,
"Failed to parse notification message %s", e);
else {
log_debug_unit(u->id,
"%s: got %s", u->id, e);
service_set_main_pid(s, pid);
unit_watch_pid(UNIT(s), pid);
}
}
/* Interpret READY= */
if (s->type == SERVICE_NOTIFY &&
s->state == SERVICE_START &&
strv_find(tags, "READY=1")) {
log_debug_unit(u->id,
"%s: got READY=1", u->id);
service_enter_start_post(s);
}
/* Interpret STATUS= */
e = strv_find_prefix(tags, "STATUS=");
if (e) {
char *t;
if (e[7]) {
if (!utf8_is_valid(e+7)) {
log_warning_unit(u->id,
"Status message in notification is not UTF-8 clean.");
return;
}
t = strdup(e+7);
if (!t) {
log_error_unit(u->id,
"Failed to allocate string.");
return;
}
log_debug_unit(u->id,
"%s: got %s", u->id, e);
free(s->status_text);
s->status_text = t;
} else {
free(s->status_text);
s->status_text = NULL;
}
}
if (strv_find(tags, "WATCHDOG=1")) {
log_debug_unit(u->id, "%s: got WATCHDOG=1", u->id);
service_reset_watchdog(s);
}
/* Notify clients about changed status or main pid */
unit_add_to_dbus_queue(u);
}
#ifdef HAVE_SYSV_COMPAT
static int service_enumerate(Manager *m) {
char **p;
unsigned i;
_cleanup_closedir_ DIR *d = NULL;
_cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
_cleanup_set_free_ Set *shutdown_services = NULL;
Unit *service;
Iterator j;
int r;
assert(m);
if (m->running_as != SYSTEMD_SYSTEM)
return 0;
STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
struct dirent *de;
free(path);
path = strjoin(*p, "/", rcnd_table[i].path, NULL);
if (!path) {
r = -ENOMEM;
goto finish;
}
if (d)
closedir(d);
d = opendir(path);
if (!d) {
if (errno != ENOENT)
log_warning("opendir(%s) failed: %m", path);
continue;
}
while ((de = readdir(d))) {
int a, b;
if (ignore_file(de->d_name))
continue;
if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
continue;
if (strlen(de->d_name) < 4)
continue;
a = undecchar(de->d_name[1]);
b = undecchar(de->d_name[2]);
if (a < 0 || b < 0)
continue;
free(fpath);
fpath = strjoin(path, "/", de->d_name, NULL);
if (!fpath) {
r = -ENOMEM;
goto finish;
}
if (access(fpath, X_OK) < 0) {
if (errno != ENOENT)
log_warning("access() failed on %s: %m", fpath);
continue;
}
free(name);
name = sysv_translate_name(de->d_name + 3);
if (!name) {
r = log_oom();
goto finish;
}
r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
if (r < 0) {
log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
continue;
}
if (de->d_name[0] == 'S') {
if (rcnd_table[i].type == RUNLEVEL_UP) {
SERVICE(service)->sysv_start_priority_from_rcnd =
MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
SERVICE(service)->sysv_enabled = true;
}
r = set_ensure_allocated(&runlevel_services[i],
trivial_hash_func, trivial_compare_func);
if (r < 0)
goto finish;
r = set_put(runlevel_services[i], service);
if (r < 0)
goto finish;
} else if (de->d_name[0] == 'K' &&
(rcnd_table[i].type == RUNLEVEL_DOWN)) {
r = set_ensure_allocated(&shutdown_services,
trivial_hash_func, trivial_compare_func);
if (r < 0)
goto finish;
r = set_put(shutdown_services, service);
if (r < 0)
goto finish;
}
}
}
/* Now we loaded all stubs and are aware of the lowest
start-up priority for all services, not let's actually load
the services, this will also tell us which services are
actually native now */
manager_dispatch_load_queue(m);
/* If this is a native service, rely on native ways to pull in
* a service, don't pull it in via sysv rcN.d links. */
for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
SET_FOREACH(service, runlevel_services[i], j) {
service = unit_follow_merge(service);
if (service->fragment_path)
continue;
r = unit_add_two_dependencies_by_name_inverse(
service, UNIT_AFTER, UNIT_WANTS,
rcnd_table[i].target, NULL, true);
if (r < 0)
goto finish;
}
/* We honour K links only for halt/reboot. For the normal
* runlevels we assume the stop jobs will be implicitly added
* by the core logic. Also, we don't really distinguish here
* between the runlevels 0 and 6 and just add them to the
* special shutdown target. */
SET_FOREACH(service, shutdown_services, j) {
service = unit_follow_merge(service);
if (service->fragment_path)
continue;
r = unit_add_two_dependencies_by_name(
service, UNIT_BEFORE, UNIT_CONFLICTS,
SPECIAL_SHUTDOWN_TARGET, NULL, true);
if (r < 0)
goto finish;
}
r = 0;
finish:
for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
set_free(runlevel_services[i]);
return r;
}
#endif
static void service_bus_name_owner_change(
Unit *u,
const char *name,
const char *old_owner,
const char *new_owner) {
Service *s = SERVICE(u);
int r;
assert(s);
assert(name);
assert(streq(s->bus_name, name));
assert(old_owner || new_owner);
if (old_owner && new_owner)
log_debug_unit(u->id,
"%s's D-Bus name %s changed owner from %s to %s",
u->id, name, old_owner, new_owner);
else if (old_owner)
log_debug_unit(u->id,
"%s's D-Bus name %s no longer registered by %s",
u->id, name, old_owner);
else
log_debug_unit(u->id,
"%s's D-Bus name %s now registered by %s",
u->id, name, new_owner);
s->bus_name_good = !!new_owner;
if (s->type == SERVICE_DBUS) {
/* service_enter_running() will figure out what to
* do */
if (s->state == SERVICE_RUNNING)
service_enter_running(s, SERVICE_SUCCESS);
else if (s->state == SERVICE_START && new_owner)
service_enter_start_post(s);
} else if (new_owner &&
s->main_pid <= 0 &&
(s->state == SERVICE_START ||
s->state == SERVICE_START_POST ||
s->state == SERVICE_RUNNING ||
s->state == SERVICE_RELOAD)) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
pid_t pid;
/* Try to acquire PID from bus service */
r = sd_bus_get_owner(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
if (r >= 0)
r = sd_bus_creds_get_pid(creds, &pid);
if (r >= 0) {
log_debug_unit(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
service_set_main_pid(s, pid);
unit_watch_pid(UNIT(s), pid);
}
}
}
int service_set_socket_fd(Service *s, int fd, Socket *sock) {
assert(s);
assert(fd >= 0);
/* This is called by the socket code when instantiating a new
* service for a stream socket and the socket needs to be
* configured. */
if (UNIT(s)->load_state != UNIT_LOADED)
return -EINVAL;
if (s->socket_fd >= 0)
return -EBUSY;
if (s->state != SERVICE_DEAD)
return -EAGAIN;
s->socket_fd = fd;
unit_ref_set(&s->accept_socket, UNIT(sock));
return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
}
static void service_reset_failed(Unit *u) {
Service *s = SERVICE(u);
assert(s);
if (s->state == SERVICE_FAILED)
service_set_state(s, SERVICE_DEAD);
s->result = SERVICE_SUCCESS;
s->reload_result = SERVICE_SUCCESS;
RATELIMIT_RESET(s->start_limit);
}
static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
Service *s = SERVICE(u);
return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
}
static const char* const service_state_table[_SERVICE_STATE_MAX] = {
[SERVICE_DEAD] = "dead",
[SERVICE_START_PRE] = "start-pre",
[SERVICE_START] = "start",
[SERVICE_START_POST] = "start-post",
[SERVICE_RUNNING] = "running",
[SERVICE_EXITED] = "exited",
[SERVICE_RELOAD] = "reload",
[SERVICE_STOP] = "stop",
[SERVICE_STOP_SIGTERM] = "stop-sigterm",
[SERVICE_STOP_SIGKILL] = "stop-sigkill",
[SERVICE_STOP_POST] = "stop-post",
[SERVICE_FINAL_SIGTERM] = "final-sigterm",
[SERVICE_FINAL_SIGKILL] = "final-sigkill",
[SERVICE_FAILED] = "failed",
[SERVICE_AUTO_RESTART] = "auto-restart",
};
DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
[SERVICE_RESTART_NO] = "no",
[SERVICE_RESTART_ON_SUCCESS] = "on-success",
[SERVICE_RESTART_ON_FAILURE] = "on-failure",
[SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
[SERVICE_RESTART_ON_ABORT] = "on-abort",
[SERVICE_RESTART_ALWAYS] = "always"
};
DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
[SERVICE_SIMPLE] = "simple",
[SERVICE_FORKING] = "forking",
[SERVICE_ONESHOT] = "oneshot",
[SERVICE_DBUS] = "dbus",
[SERVICE_NOTIFY] = "notify",
[SERVICE_IDLE] = "idle"
};
DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
[SERVICE_EXEC_START_PRE] = "ExecStartPre",
[SERVICE_EXEC_START] = "ExecStart",
[SERVICE_EXEC_START_POST] = "ExecStartPost",
[SERVICE_EXEC_RELOAD] = "ExecReload",
[SERVICE_EXEC_STOP] = "ExecStop",
[SERVICE_EXEC_STOP_POST] = "ExecStopPost",
};
DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
[NOTIFY_NONE] = "none",
[NOTIFY_MAIN] = "main",
[NOTIFY_ALL] = "all"
};
DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
[SERVICE_SUCCESS] = "success",
[SERVICE_FAILURE_RESOURCES] = "resources",
[SERVICE_FAILURE_TIMEOUT] = "timeout",
[SERVICE_FAILURE_EXIT_CODE] = "exit-code",
[SERVICE_FAILURE_SIGNAL] = "signal",
[SERVICE_FAILURE_CORE_DUMP] = "core-dump",
[SERVICE_FAILURE_WATCHDOG] = "watchdog",
[SERVICE_FAILURE_START_LIMIT] = "start-limit"
};
DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
[SERVICE_START_LIMIT_NONE] = "none",
[SERVICE_START_LIMIT_REBOOT] = "reboot",
[SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
[SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
};
DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
const UnitVTable service_vtable = {
.object_size = sizeof(Service),
.exec_context_offset = offsetof(Service, exec_context),
.cgroup_context_offset = offsetof(Service, cgroup_context),
.kill_context_offset = offsetof(Service, kill_context),
.exec_runtime_offset = offsetof(Service, exec_runtime),
.sections =
"Unit\0"
"Service\0"
"Install\0",
.private_section = "Service",
.init = service_init,
.done = service_done,
.load = service_load,
.coldplug = service_coldplug,
.dump = service_dump,
.start = service_start,
.stop = service_stop,
.reload = service_reload,
.can_reload = service_can_reload,
.kill = service_kill,
.serialize = service_serialize,
.deserialize_item = service_deserialize_item,
.active_state = service_active_state,
.sub_state_to_string = service_sub_state_to_string,
.check_gc = service_check_gc,
.check_snapshot = service_check_snapshot,
.sigchld_event = service_sigchld_event,
.reset_failed = service_reset_failed,
.notify_cgroup_empty = service_notify_cgroup_empty_event,
.notify_message = service_notify_message,
.bus_name_owner_change = service_bus_name_owner_change,
.bus_interface = "org.freedesktop.systemd1.Service",
.bus_vtable = bus_service_vtable,
.bus_changing_properties = bus_service_changing_properties,
.bus_set_property = bus_service_set_property,
.bus_commit_properties = bus_service_commit_properties,
#ifdef HAVE_SYSV_COMPAT
.enumerate = service_enumerate,
#endif
.can_transient = true,
.status_message_formats = {
.starting_stopping = {
[0] = "Starting %s...",
[1] = "Stopping %s...",
},
.finished_start_job = {
[JOB_DONE] = "Started %s.",
[JOB_FAILED] = "Failed to start %s.",
[JOB_DEPENDENCY] = "Dependency failed for %s.",
[JOB_TIMEOUT] = "Timed out starting %s.",
},
.finished_stop_job = {
[JOB_DONE] = "Stopped %s.",
[JOB_FAILED] = "Stopped (with error) %s.",
[JOB_TIMEOUT] = "Timed out stopping %s.",
},
},
};