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-rw-r--r--src/libcore/service.c3366
1 files changed, 3366 insertions, 0 deletions
diff --git a/src/libcore/service.c b/src/libcore/service.c
new file mode 100644
index 0000000000..ac7e41d777
--- /dev/null
+++ b/src/libcore/service.c
@@ -0,0 +1,3366 @@
+/***
+ 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 <unistd.h>
+
+#include "alloc-util.h"
+#include "async.h"
+#include "bus-error.h"
+#include "bus-kernel.h"
+#include "bus-util.h"
+#include "dbus-service.h"
+#include "def.h"
+#include "env-util.h"
+#include "escape.h"
+#include "exit-status.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "formats-util.h"
+#include "fs-util.h"
+#include "load-dropin.h"
+#include "load-fragment.h"
+#include "log.h"
+#include "manager.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "service.h"
+#include "signal-util.h"
+#include "special.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "unit-name.h"
+#include "unit-printf.h"
+#include "unit.h"
+#include "utf8.h"
+#include "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_SIGABRT] = 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_SIGABRT] = 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_enter_reload_by_notify(Service *s);
+
+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->runtime_max_usec = USEC_INFINITY;
+ s->type = _SERVICE_TYPE_INVALID;
+ s->socket_fd = -1;
+ s->bus_endpoint_fd = -1;
+ s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
+ s->guess_main_pid = true;
+
+ 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_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path);
+ path_spec_unwatch(s->pid_file_pathspec);
+ path_spec_done(s->pid_file_pathspec);
+ s->pid_file_pathspec = mfree(s->pid_file_pathspec);
+}
+
+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_process_ppid(pid, &ppid) >= 0 && ppid != getpid()) {
+ log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid);
+ s->main_pid_alien = true;
+ } else
+ s->main_pid_alien = false;
+
+ return 0;
+}
+
+static void service_close_socket_fd(Service *s) {
+ assert(s);
+
+ 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, usec_add(s->watchdog_timestamp.monotonic, s->watchdog_usec));
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m");
+ 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,
+ usec_add(s->watchdog_timestamp.monotonic, s->watchdog_usec), 0,
+ service_dispatch_watchdog, s);
+ if (r < 0) {
+ log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m");
+ return;
+ }
+
+ (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog");
+
+ /* 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_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m");
+}
+
+static void service_reset_watchdog(Service *s) {
+ assert(s);
+
+ dual_timestamp_get(&s->watchdog_timestamp);
+ service_start_watchdog(s);
+}
+
+static void service_fd_store_unlink(ServiceFDStore *fs) {
+
+ if (!fs)
+ return;
+
+ if (fs->service) {
+ assert(fs->service->n_fd_store > 0);
+ LIST_REMOVE(fd_store, fs->service->fd_store, fs);
+ fs->service->n_fd_store--;
+ }
+
+ if (fs->event_source) {
+ sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
+ sd_event_source_unref(fs->event_source);
+ }
+
+ free(fs->fdname);
+ safe_close(fs->fd);
+ free(fs);
+}
+
+static void service_release_resources(Unit *u) {
+ Service *s = SERVICE(u);
+
+ assert(s);
+
+ if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0)
+ return;
+
+ log_unit_debug(u, "Releasing all resources.");
+
+ s->stdin_fd = safe_close(s->stdin_fd);
+ s->stdout_fd = safe_close(s->stdout_fd);
+ s->stderr_fd = safe_close(s->stderr_fd);
+
+ while (s->fd_store)
+ service_fd_store_unlink(s->fd_store);
+
+ assert(s->n_fd_store == 0);
+}
+
+static void service_done(Unit *u) {
+ Service *s = SERVICE(u);
+
+ assert(s);
+
+ s->pid_file = mfree(s->pid_file);
+ s->status_text = mfree(s->status_text);
+
+ 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);
+ s->bus_name = mfree(s->bus_name);
+ }
+
+ s->bus_name_owner = mfree(s->bus_name_owner);
+
+ s->bus_endpoint_fd = safe_close(s->bus_endpoint_fd);
+ 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);
+
+ service_release_resources(u);
+}
+
+static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
+ ServiceFDStore *fs = userdata;
+
+ assert(e);
+ assert(fs);
+
+ /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
+ service_fd_store_unlink(fs);
+ return 0;
+}
+
+static int service_add_fd_store(Service *s, int fd, const char *name) {
+ ServiceFDStore *fs;
+ int r;
+
+ assert(s);
+ assert(fd >= 0);
+
+ if (s->n_fd_store >= s->n_fd_store_max)
+ return 0;
+
+ LIST_FOREACH(fd_store, fs, s->fd_store) {
+ r = same_fd(fs->fd, fd);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ /* Already included */
+ safe_close(fd);
+ return 1;
+ }
+ }
+
+ fs = new0(ServiceFDStore, 1);
+ if (!fs)
+ return -ENOMEM;
+
+ fs->fd = fd;
+ fs->service = s;
+ fs->fdname = strdup(name ?: "stored");
+ if (!fs->fdname) {
+ free(fs);
+ return -ENOMEM;
+ }
+
+ r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
+ if (r < 0) {
+ free(fs->fdname);
+ free(fs);
+ return r;
+ }
+
+ (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
+
+ LIST_PREPEND(fd_store, s->fd_store, fs);
+ s->n_fd_store++;
+
+ return 1;
+}
+
+static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
+ int r;
+
+ assert(s);
+
+ if (fdset_size(fds) <= 0)
+ return 0;
+
+ while (s->n_fd_store < s->n_fd_store_max) {
+ _cleanup_close_ int fd = -1;
+
+ fd = fdset_steal_first(fds);
+ if (fd < 0)
+ break;
+
+ r = service_add_fd_store(s, fd, name);
+ if (r < 0)
+ return log_unit_error_errno(UNIT(s), r, "Couldn't add fd to fd store: %m");
+ if (r > 0) {
+ log_unit_debug(UNIT(s), "Added fd to fd store.");
+ fd = -1;
+ }
+ }
+
+ if (fdset_size(fds) > 0)
+ log_unit_warning(UNIT(s), "Tried to store more fds than FileDescriptorStoreMax=%u allows, closing remaining.", s->n_fd_store_max);
+
+ return 0;
+}
+
+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, usec);
+ if (r < 0)
+ return r;
+
+ return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
+ }
+
+ if (usec == USEC_INFINITY)
+ return 0;
+
+ r = sd_event_add_time(
+ UNIT(s)->manager->event,
+ &s->timer_event_source,
+ CLOCK_MONOTONIC,
+ usec, 0,
+ service_dispatch_timer, s);
+ if (r < 0)
+ return r;
+
+ (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
+
+ return 0;
+}
+
+static int service_verify(Service *s) {
+ assert(s);
+
+ if (UNIT(s)->load_state != UNIT_LOADED)
+ return 0;
+
+ if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
+ log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
+ log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
+ return -EINVAL;
+ }
+
+ if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
+ log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
+ log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
+ log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
+ log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->type == SERVICE_DBUS && !s->bus_name) {
+ log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->bus_name && s->type != SERVICE_DBUS)
+ log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
+
+ if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
+ log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
+ return -EINVAL;
+ }
+
+ if (s->usb_function_descriptors && !s->usb_function_strings)
+ log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
+
+ if (!s->usb_function_descriptors && s->usb_function_strings)
+ log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
+
+ if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
+ log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
+
+ return 0;
+}
+
+static int service_add_default_dependencies(Service *s) {
+ int r;
+
+ assert(s);
+
+ if (!UNIT(s)->default_dependencies)
+ return 0;
+
+ /* Add a number of automatic dependencies useful for the
+ * majority of services. */
+
+ if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
+ /* First, pull in the really early boot stuff, and
+ * require it, so that we fail if we can't acquire
+ * it. */
+
+ r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+ } else {
+
+ /* In the --user instance there's no sysinit.target,
+ * in that case require basic.target instead. */
+
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+ }
+
+ /* Second, if the rest of the base system is in the same
+ * transaction, order us after it, but do not pull it in or
+ * even require it. */
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+
+ /* Third, add us in for normal shutdown. */
+ return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
+}
+
+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_setup_bus_name(Service *s) {
+ int r;
+
+ assert(s);
+
+ if (!s->bus_name)
+ return 0;
+
+ if (is_kdbus_available()) {
+ const char *n;
+
+ n = strjoina(s->bus_name, ".busname");
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, n, NULL, true);
+ if (r < 0)
+ return log_unit_error_errno(UNIT(s), r, "Failed to add dependency to .busname unit: %m");
+
+ } else {
+ /* If kdbus is not available, we know the dbus socket is required, hence pull it in, and require it */
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
+ if (r < 0)
+ return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
+ }
+
+ /* Regardless if kdbus is used or not, we always want to be ordered against dbus.socket if both are in the transaction. */
+ r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
+ if (r < 0)
+ return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
+
+ r = unit_watch_bus_name(UNIT(s), s->bus_name);
+ if (r == -EEXIST)
+ return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
+ if (r < 0)
+ return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
+
+ return 0;
+}
+
+static int service_add_extras(Service *s) {
+ int r;
+
+ assert(s);
+
+ if (s->type == _SERVICE_TYPE_INVALID) {
+ /* Figure out a type automatically */
+ if (s->bus_name)
+ s->type = SERVICE_DBUS;
+ else if (s->exec_command[SERVICE_EXEC_START])
+ s->type = SERVICE_SIMPLE;
+ else
+ s->type = SERVICE_ONESHOT;
+ }
+
+ /* Oneshot services have disabled start timeout by default */
+ if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
+ s->timeout_start_usec = USEC_INFINITY;
+
+ service_fix_output(s);
+
+ r = unit_patch_contexts(UNIT(s));
+ if (r < 0)
+ return r;
+
+ r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
+ if (r < 0)
+ return r;
+
+ r = unit_set_default_slice(UNIT(s));
+ 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;
+
+ r = service_add_default_dependencies(s);
+ if (r < 0)
+ return r;
+
+ r = service_setup_bus_name(s);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int service_load(Unit *u) {
+ Service *s = SERVICE(u);
+ int r;
+
+ 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;
+
+ /* This is a new unit? Then let's add in some
+ * extras */
+ r = service_add_extras(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;
+
+ assert(s);
+
+ prefix = strempty(prefix);
+ prefix2 = strjoina(prefix, "\t");
+
+ 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"
+ "%sNotifyState: %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),
+ prefix, notify_state_to_string(s->notify_state));
+
+ 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);
+ }
+
+ if (s->status_text)
+ fprintf(f, "%sStatus Text: %s\n",
+ prefix, s->status_text);
+
+ if (s->n_fd_store_max > 0)
+ fprintf(f,
+ "%sFile Descriptor Store Max: %u\n"
+ "%sFile Descriptor Store Current: %u\n",
+ prefix, s->n_fd_store_max,
+ prefix, s->n_fd_store);
+}
+
+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_unit_info_errno(UNIT(s), r, "PID file %s not readable (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state));
+ return r;
+ }
+
+ r = parse_pid(k, &pid);
+ if (r < 0) {
+ if (may_warn)
+ log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
+ return r;
+ }
+
+ if (!pid_is_alive(pid)) {
+ if (may_warn)
+ log_unit_info(UNIT(s), "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_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
+
+ service_unwatch_main_pid(s);
+ s->main_pid_known = false;
+ } else
+ log_unit_debug(UNIT(s), "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_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
+ return r;
+ }
+
+ return 0;
+}
+
+static int service_search_main_pid(Service *s) {
+ pid_t pid = 0;
+ 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);
+
+ r = unit_search_main_pid(UNIT(s), &pid);
+ if (r < 0)
+ return r;
+
+ log_unit_debug(UNIT(s), "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_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
+ 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_RUNNING,
+ SERVICE_RELOAD,
+ SERVICE_STOP, SERVICE_STOP_SIGABRT, 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_SIGABRT, 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_SIGABRT, 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_SIGABRT, 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_prune_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;
+
+ 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_unit_debug(UNIT(s), "Changed %s -> %s", 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);
+}
+
+static usec_t service_coldplug_timeout(Service *s) {
+ assert(s);
+
+ switch (s->deserialized_state) {
+
+ case SERVICE_START_PRE:
+ case SERVICE_START:
+ case SERVICE_START_POST:
+ case SERVICE_RELOAD:
+ return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
+
+ case SERVICE_RUNNING:
+ return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
+
+ case SERVICE_STOP:
+ case SERVICE_STOP_SIGABRT:
+ case SERVICE_STOP_SIGTERM:
+ case SERVICE_STOP_SIGKILL:
+ case SERVICE_STOP_POST:
+ case SERVICE_FINAL_SIGTERM:
+ case SERVICE_FINAL_SIGKILL:
+ return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
+
+ case SERVICE_AUTO_RESTART:
+ return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
+
+ default:
+ return USEC_INFINITY;
+ }
+}
+
+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)
+ return 0;
+
+ r = service_arm_timer(s, service_coldplug_timeout(s));
+ if (r < 0)
+ return r;
+
+ if (s->main_pid > 0 &&
+ 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_SIGABRT, 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 (s->control_pid > 0 &&
+ 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_SIGABRT, 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, char ***fd_names) {
+ _cleanup_strv_free_ char **rfd_names = NULL;
+ _cleanup_free_ int *rfds = NULL;
+ int rn_fds = 0, r;
+
+ assert(s);
+ assert(fds);
+ assert(fd_names);
+
+ if (s->socket_fd >= 0) {
+
+ /* Pass the per-connection socket */
+
+ rfds = new(int, 1);
+ if (!rfds)
+ return -ENOMEM;
+ rfds[0] = s->socket_fd;
+
+ rfd_names = strv_new("connection", NULL);
+ if (!rfd_names)
+ return -ENOMEM;
+
+ rn_fds = 1;
+ } else {
+ Iterator i;
+ Unit *u;
+
+ /* Pass all our configured sockets for singleton services */
+
+ SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
+ _cleanup_free_ int *cfds = NULL;
+ Socket *sock;
+ int cn_fds;
+
+ if (u->type != UNIT_SOCKET)
+ continue;
+
+ sock = SOCKET(u);
+
+ cn_fds = socket_collect_fds(sock, &cfds);
+ if (cn_fds < 0)
+ return cn_fds;
+
+ if (cn_fds <= 0)
+ continue;
+
+ if (!rfds) {
+ rfds = cfds;
+ rn_fds = cn_fds;
+
+ cfds = NULL;
+ } else {
+ int *t;
+
+ t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int));
+ if (!t)
+ return -ENOMEM;
+
+ memcpy(t + rn_fds, cfds, cn_fds * sizeof(int));
+
+ rfds = t;
+ rn_fds += cn_fds;
+ }
+
+ r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ if (s->n_fd_store > 0) {
+ ServiceFDStore *fs;
+ char **nl;
+ int *t;
+
+ t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int));
+ if (!t)
+ return -ENOMEM;
+
+ rfds = t;
+
+ nl = realloc(rfd_names, (rn_fds + s->n_fd_store + 1) * sizeof(char*));
+ if (!nl)
+ return -ENOMEM;
+
+ rfd_names = nl;
+
+ LIST_FOREACH(fd_store, fs, s->fd_store) {
+ rfds[rn_fds] = fs->fd;
+ rfd_names[rn_fds] = strdup(strempty(fs->fdname));
+ if (!rfd_names[rn_fds])
+ return -ENOMEM;
+
+ rn_fds++;
+ }
+
+ rfd_names[rn_fds] = NULL;
+ }
+
+ *fds = rfds;
+ *fd_names = rfd_names;
+
+ rfds = NULL;
+ rfd_names = NULL;
+
+ return rn_fds;
+}
+
+static int service_spawn(
+ Service *s,
+ ExecCommand *c,
+ usec_t timeout,
+ bool pass_fds,
+ bool apply_permissions,
+ bool apply_chroot,
+ bool apply_tty_stdin,
+ bool is_control,
+ pid_t *_pid) {
+
+ _cleanup_strv_free_ char **argv = NULL, **final_env = NULL, **our_env = NULL, **fd_names = NULL;
+ _cleanup_free_ char *bus_endpoint_path = NULL;
+ _cleanup_free_ int *fds = NULL;
+ unsigned n_fds = 0, n_env = 0;
+ const char *path;
+ pid_t pid;
+
+ ExecParameters exec_params = {
+ .apply_permissions = apply_permissions,
+ .apply_chroot = apply_chroot,
+ .apply_tty_stdin = apply_tty_stdin,
+ .bus_endpoint_fd = -1,
+ .stdin_fd = -1,
+ .stdout_fd = -1,
+ .stderr_fd = -1,
+ };
+
+ int r;
+
+ assert(s);
+ assert(c);
+ assert(_pid);
+
+ (void) unit_realize_cgroup(UNIT(s));
+ if (s->reset_cpu_usage) {
+ (void) unit_reset_cpu_usage(UNIT(s));
+ s->reset_cpu_usage = false;
+ }
+
+ r = unit_setup_exec_runtime(UNIT(s));
+ if (r < 0)
+ return r;
+
+ 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) {
+
+ r = service_collect_fds(s, &fds, &fd_names);
+ if (r < 0)
+ return r;
+
+ n_fds = r;
+ }
+
+ r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
+ if (r < 0)
+ return r;
+
+ r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
+ if (r < 0)
+ return r;
+
+ our_env = new0(char*, 6);
+ if (!our_env)
+ return -ENOMEM;
+
+ if (is_control ? s->notify_access == NOTIFY_ALL : s->notify_access != NOTIFY_NONE)
+ if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
+ return -ENOMEM;
+
+ if (s->main_pid > 0)
+ if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
+ return -ENOMEM;
+
+ if (UNIT(s)->manager->running_as != MANAGER_SYSTEM)
+ if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0)
+ return -ENOMEM;
+
+ if (s->socket_fd >= 0) {
+ union sockaddr_union sa;
+ socklen_t salen = sizeof(sa);
+
+ r = getpeername(s->socket_fd, &sa.sa, &salen);
+ if (r < 0)
+ return -errno;
+
+ if (IN_SET(sa.sa.sa_family, AF_INET, AF_INET6)) {
+ _cleanup_free_ char *addr = NULL;
+ char *t;
+ int port;
+
+ r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
+ if (r < 0)
+ return r;
+
+ t = strappend("REMOTE_ADDR=", addr);
+ if (!t)
+ return -ENOMEM;
+ our_env[n_env++] = t;
+
+ port = sockaddr_port(&sa.sa);
+ if (port < 0)
+ return port;
+
+ if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
+ return -ENOMEM;
+ our_env[n_env++] = t;
+ }
+ }
+
+ final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
+ if (!final_env)
+ return -ENOMEM;
+
+ if (is_control && UNIT(s)->cgroup_path) {
+ path = strjoina(UNIT(s)->cgroup_path, "/control");
+ (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
+ } else
+ path = UNIT(s)->cgroup_path;
+
+ if (s->exec_context.bus_endpoint) {
+ r = bus_kernel_create_endpoint(UNIT(s)->manager->running_as == MANAGER_SYSTEM ? "system" : "user",
+ UNIT(s)->id, &bus_endpoint_path);
+ if (r < 0)
+ return r;
+
+ /* Pass the fd to the exec_params so that the child process can upload the policy.
+ * Keep a reference to the fd in the service, so the endpoint is kept alive as long
+ * as the service is running. */
+ exec_params.bus_endpoint_fd = s->bus_endpoint_fd = r;
+ }
+
+ exec_params.argv = argv;
+ exec_params.fds = fds;
+ exec_params.fd_names = fd_names;
+ exec_params.n_fds = n_fds;
+ exec_params.environment = final_env;
+ exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn;
+ exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
+ exec_params.cgroup_path = path;
+ exec_params.cgroup_delegate = s->cgroup_context.delegate;
+ exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
+ exec_params.watchdog_usec = s->watchdog_usec;
+ exec_params.bus_endpoint_path = bus_endpoint_path;
+ exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
+ if (s->type == SERVICE_IDLE)
+ exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
+ exec_params.stdin_fd = s->stdin_fd;
+ exec_params.stdout_fd = s->stdout_fd;
+ exec_params.stderr_fd = s->stderr_fd;
+
+ r = exec_spawn(UNIT(s),
+ c,
+ &s->exec_context,
+ &exec_params,
+ s->exec_runtime,
+ &pid);
+ if (r < 0)
+ return r;
+
+ r = unit_watch_pid(UNIT(s), pid);
+ if (r < 0)
+ /* FIXME: we need to do something here */
+ return r;
+
+ *_pid = pid;
+
+ return 0;
+}
+
+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 let's 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 pid_is_alive(s->main_pid);
+
+ /* .. 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);
+ if (r < 0)
+ return r;
+
+ return !r;
+}
+
+static bool service_shall_restart(Service *s) {
+ assert(s);
+
+ /* Don't restart after manual stops */
+ if (s->forbid_restart)
+ return false;
+
+ /* Never restart if this is configured as special exception */
+ if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
+ return false;
+
+ /* Restart if the exit code/status are configured as restart triggers */
+ if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
+ return true;
+
+ switch (s->restart) {
+
+ case SERVICE_RESTART_NO:
+ return false;
+
+ case SERVICE_RESTART_ALWAYS:
+ return true;
+
+ case SERVICE_RESTART_ON_SUCCESS:
+ return s->result == SERVICE_SUCCESS;
+
+ case SERVICE_RESTART_ON_FAILURE:
+ return s->result != SERVICE_SUCCESS;
+
+ case SERVICE_RESTART_ON_ABNORMAL:
+ return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
+
+ case SERVICE_RESTART_ON_WATCHDOG:
+ return s->result == SERVICE_FAILURE_WATCHDOG;
+
+ case SERVICE_RESTART_ON_ABORT:
+ return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
+
+ default:
+ assert_not_reached("unknown restart setting");
+ }
+}
+
+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 (s->result != SERVICE_SUCCESS) {
+ log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
+ failure_action(UNIT(s)->manager, s->failure_action, UNIT(s)->reboot_arg);
+ }
+
+ if (allow_restart && service_shall_restart(s)) {
+
+ r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
+ if (r < 0)
+ goto fail;
+
+ service_set_state(s, SERVICE_AUTO_RESTART);
+ }
+
+ /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
+ 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);
+
+ /* Also, remove the runtime directory in */
+ exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
+
+ /* 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)
+ (void) unlink(s->pid_file);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
+ 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);
+ unit_watch_all_pids(UNIT(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,
+ s->timeout_stop_usec,
+ false,
+ !s->permissions_start_only,
+ !s->root_directory_start_only,
+ true,
+ true,
+ &s->control_pid);
+ if (r < 0)
+ goto fail;
+
+ service_set_state(s, SERVICE_STOP_POST);
+ } else
+ service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
+ service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
+}
+
+static int state_to_kill_operation(ServiceState state) {
+ switch (state) {
+
+ case SERVICE_STOP_SIGABRT:
+ return KILL_ABORT;
+
+ case SERVICE_STOP_SIGTERM:
+ case SERVICE_FINAL_SIGTERM:
+ return KILL_TERMINATE;
+
+ case SERVICE_STOP_SIGKILL:
+ case SERVICE_FINAL_SIGKILL:
+ return KILL_KILL;
+
+ default:
+ return _KILL_OPERATION_INVALID;
+ }
+}
+
+static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
+ int r;
+
+ assert(s);
+
+ if (f != SERVICE_SUCCESS)
+ s->result = f;
+
+ unit_watch_all_pids(UNIT(s));
+
+ r = unit_kill_context(
+ UNIT(s),
+ &s->kill_context,
+ state_to_kill_operation(state),
+ s->main_pid,
+ s->control_pid,
+ s->main_pid_alien);
+
+ if (r < 0)
+ goto fail;
+
+ if (r > 0) {
+ r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
+ if (r < 0)
+ goto fail;
+
+ service_set_state(s, state);
+ } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
+ service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
+ else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
+ service_enter_stop_post(s, SERVICE_SUCCESS);
+ else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
+ service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
+ else
+ service_enter_dead(s, SERVICE_SUCCESS, true);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
+
+ if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, 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_by_notify(Service *s) {
+ assert(s);
+
+ unit_watch_all_pids(UNIT(s));
+
+ service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
+
+ /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
+ service_set_state(s, SERVICE_STOP_SIGTERM);
+}
+
+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);
+ unit_watch_all_pids(UNIT(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,
+ s->timeout_stop_usec,
+ false,
+ !s->permissions_start_only,
+ !s->root_directory_start_only,
+ 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_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
+ service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
+}
+
+static bool service_good(Service *s) {
+ int main_pid_ok;
+ assert(s);
+
+ if (s->type == SERVICE_DBUS && !s->bus_name_good)
+ return false;
+
+ main_pid_ok = main_pid_good(s);
+ if (main_pid_ok > 0) /* It's alive */
+ return true;
+ if (main_pid_ok == 0) /* It's dead */
+ return false;
+
+ /* OK, we don't know anything about the main PID, maybe
+ * because there is none. Let's check the control group
+ * instead. */
+
+ return cgroup_good(s) != 0;
+}
+
+static void service_enter_running(Service *s, ServiceResult f) {
+ assert(s);
+
+ if (f != SERVICE_SUCCESS)
+ s->result = f;
+
+ service_unwatch_control_pid(s);
+
+ if (service_good(s)) {
+
+ /* If there are any queued up sd_notify()
+ * notifications, process them now */
+ if (s->notify_state == NOTIFY_RELOADING)
+ service_enter_reload_by_notify(s);
+ else if (s->notify_state == NOTIFY_STOPPING)
+ service_enter_stop_by_notify(s);
+ else {
+ service_set_state(s, SERVICE_RUNNING);
+ service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
+ }
+
+ } 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,
+ s->timeout_start_usec,
+ false,
+ !s->permissions_start_only,
+ !s->root_directory_start_only,
+ 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_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
+ service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
+}
+
+static void service_kill_control_processes(Service *s) {
+ char *p;
+
+ if (!UNIT(s)->cgroup_path)
+ return;
+
+ p = strjoina(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;
+ usec_t timeout;
+ pid_t pid;
+ int r;
+
+ assert(s);
+
+ 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];
+ }
+
+ if (!c) {
+ assert(s->type == SERVICE_ONESHOT);
+ service_enter_start_post(s);
+ return;
+ }
+
+ if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
+ /* For simple + idle this is the main process. We don't apply any timeout here, but
+ * service_enter_running() will later apply the .runtime_max_usec timeout. */
+ timeout = USEC_INFINITY;
+ else
+ timeout = s->timeout_start_usec;
+
+ r = service_spawn(s,
+ c,
+ timeout,
+ true,
+ true,
+ true,
+ true,
+ false,
+ &pid);
+ if (r < 0)
+ goto fail;
+
+ if (IN_SET(s->type, SERVICE_SIMPLE, 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 (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, 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_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
+ 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,
+ s->timeout_start_usec,
+ false,
+ !s->permissions_start_only,
+ !s->root_directory_start_only,
+ true,
+ true,
+ &s->control_pid);
+ if (r < 0)
+ goto fail;
+
+ service_set_state(s, SERVICE_START_PRE);
+ } else
+ service_enter_start(s);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
+ service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
+}
+
+static void service_enter_restart(Service *s) {
+ _cleanup_(sd_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_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
+
+ r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), 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, &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_unit_debug(UNIT(s), "Scheduled restart job.");
+ return;
+
+fail:
+ log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
+ service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
+}
+
+static void service_enter_reload_by_notify(Service *s) {
+ assert(s);
+
+ service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
+ service_set_state(s, SERVICE_RELOAD);
+}
+
+static void service_enter_reload(Service *s) {
+ int r;
+
+ assert(s);
+
+ service_unwatch_control_pid(s);
+ s->reload_result = SERVICE_SUCCESS;
+
+ 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,
+ s->timeout_start_usec,
+ false,
+ !s->permissions_start_only,
+ !s->root_directory_start_only,
+ 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_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
+ s->reload_result = SERVICE_FAILURE_RESOURCES;
+ service_enter_running(s, SERVICE_SUCCESS);
+}
+
+static void service_run_next_control(Service *s) {
+ usec_t timeout;
+ 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);
+
+ if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
+ timeout = s->timeout_start_usec;
+ else
+ timeout = s->timeout_stop_usec;
+
+ r = service_spawn(s,
+ s->control_command,
+ timeout,
+ 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,
+ true,
+ &s->control_pid);
+ if (r < 0)
+ goto fail;
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
+
+ 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,
+ s->timeout_start_usec,
+ true,
+ true,
+ true,
+ true,
+ false,
+ &pid);
+ if (r < 0)
+ goto fail;
+
+ service_set_main_pid(s, pid);
+
+ return;
+
+fail:
+ log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
+ service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
+}
+
+static int service_start(Unit *u) {
+ Service *s = SERVICE(u);
+
+ assert(s);
+
+ /* We cannot fulfill this request right now, try again later
+ * please! */
+ if (IN_SET(s->state,
+ SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
+ SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
+ return -EAGAIN;
+
+ /* Already on it! */
+ if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, 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(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
+
+ s->result = SERVICE_SUCCESS;
+ s->reload_result = SERVICE_SUCCESS;
+ s->main_pid_known = false;
+ s->main_pid_alien = false;
+ s->forbid_restart = false;
+ s->reset_cpu_usage = true;
+
+ s->status_text = mfree(s->status_text);
+ s->status_errno = 0;
+
+ s->notify_state = NOTIFY_UNKNOWN;
+
+ service_enter_start_pre(s);
+ return 1;
+}
+
+static int service_stop(Unit *u) {
+ Service *s = SERVICE(u);
+
+ assert(s);
+
+ /* Don't create restart jobs from manual stops. */
+ s->forbid_restart = true;
+
+ /* Already on it */
+ if (IN_SET(s->state,
+ SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
+ SERVICE_FINAL_SIGTERM, 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 (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
+ service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
+ return 0;
+ }
+
+ assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
+
+ service_enter_stop(s, SERVICE_SUCCESS);
+ return 1;
+}
+
+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 1;
+}
+
+_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);
+ ServiceFDStore *fs;
+ int r;
+
+ 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", PID_FMT, s->control_pid);
+
+ if (s->main_pid_known && s->main_pid > 0)
+ unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
+
+ unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
+ unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
+ unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
+
+ r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
+ if (r < 0)
+ return r;
+
+ /* 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));
+
+ r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
+ if (r < 0)
+ return r;
+ r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
+ if (r < 0)
+ return r;
+ r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
+ if (r < 0)
+ return r;
+
+ r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
+ if (r < 0)
+ return r;
+ r = unit_serialize_item_fd(u, f, fds, "endpoint-fd", s->bus_endpoint_fd);
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(fd_store, fs, s->fd_store) {
+ _cleanup_free_ char *c = NULL;
+ int copy;
+
+ copy = fdset_put_dup(fds, fs->fd);
+ if (copy < 0)
+ return copy;
+
+ c = cescape(fs->fdname);
+
+ unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
+ }
+
+ if (s->main_exec_status.pid > 0) {
+ unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, 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);
+
+ 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);
+ int r;
+
+ assert(u);
+ assert(key);
+ assert(value);
+ assert(fds);
+
+ if (streq(key, "state")) {
+ ServiceState state;
+
+ state = service_state_from_string(value);
+ if (state < 0)
+ log_unit_debug(u, "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_unit_debug(u, "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_unit_debug(u, "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_unit_debug(u, "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_unit_debug(u, "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_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
+ else
+ s->main_pid_known = b;
+ } else if (streq(key, "bus-name-good")) {
+ int b;
+
+ b = parse_boolean(value);
+ if (b < 0)
+ log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
+ else
+ s->bus_name_good = b;
+ } else if (streq(key, "bus-name-owner")) {
+ r = free_and_strdup(&s->bus_name_owner, value);
+ if (r < 0)
+ log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
+ } else if (streq(key, "status-text")) {
+ char *t;
+
+ r = cunescape(value, 0, &t);
+ if (r < 0)
+ log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
+ 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_unit_debug(u, "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_unit_debug(u, "Failed to parse socket-fd value: %s", value);
+ else {
+ asynchronous_close(s->socket_fd);
+ s->socket_fd = fdset_remove(fds, fd);
+ }
+ } else if (streq(key, "endpoint-fd")) {
+ int fd;
+
+ if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse endpoint-fd value: %s", value);
+ else {
+ safe_close(s->bus_endpoint_fd);
+ s->bus_endpoint_fd = fdset_remove(fds, fd);
+ }
+ } else if (streq(key, "fd-store-fd")) {
+ const char *fdv;
+ size_t pf;
+ int fd;
+
+ pf = strcspn(value, WHITESPACE);
+ fdv = strndupa(value, pf);
+
+ if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
+ else {
+ _cleanup_free_ char *t = NULL;
+ const char *fdn;
+
+ fdn = value + pf;
+ fdn += strspn(fdn, WHITESPACE);
+ (void) cunescape(fdn, 0, &t);
+
+ r = service_add_fd_store(s, fd, t);
+ if (r < 0)
+ log_unit_error_errno(u, r, "Failed to add fd to store: %m");
+ else if (r > 0)
+ fdset_remove(fds, fd);
+ }
+
+ } else if (streq(key, "main-exec-status-pid")) {
+ pid_t pid;
+
+ if (parse_pid(value, &pid) < 0)
+ log_unit_debug(u, "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_unit_debug(u, "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_unit_debug(u, "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_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
+ else
+ s->forbid_restart = b;
+ } else if (streq(key, "stdin-fd")) {
+ int fd;
+
+ if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
+ else {
+ asynchronous_close(s->stdin_fd);
+ s->stdin_fd = fdset_remove(fds, fd);
+ s->exec_context.stdio_as_fds = true;
+ }
+ } else if (streq(key, "stdout-fd")) {
+ int fd;
+
+ if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
+ else {
+ asynchronous_close(s->stdout_fd);
+ s->stdout_fd = fdset_remove(fds, fd);
+ s->exec_context.stdio_as_fds = true;
+ }
+ } else if (streq(key, "stderr-fd")) {
+ int fd;
+
+ if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
+ log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
+ else {
+ asynchronous_close(s->stderr_fd);
+ s->stderr_fd = fdset_remove(fds, fd);
+ s->exec_context.stdio_as_fds = true;
+ }
+ } else
+ log_unit_debug(u, "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;
+
+ return false;
+}
+
+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_unit_debug(UNIT(s), "Setting watch for PID file %s", 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_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
+ service_retry_pid_file(s);
+
+ return 0;
+fail:
+ log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
+ 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_unit_debug(UNIT(s), "inotify event");
+
+ 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_notify_cgroup_empty_event(Unit *u) {
+ Service *s = SERVICE(u);
+
+ assert(u);
+
+ log_unit_debug(u, "cgroup is empty");
+
+ 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_unit_warning(u, "Daemon never wrote its PID file. Failing.");
+
+ 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_SIGABRT:
+ 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_STOP_POST:
+ 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_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(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
+ LOG_UNIT_ID(u),
+ LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
+ 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_unit_debug(u, "Running next main command for state %s.", 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_SIGABRT:
+ 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;
+
+ case SERVICE_STOP_POST:
+ case SERVICE_FINAL_SIGTERM:
+ case SERVICE_FINAL_SIGKILL:
+
+ if (!control_pid_good(s))
+ service_enter_dead(s, f, true);
+ 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_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
+ "Control process exited, code=%s status=%i",
+ 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_unit_debug(u, "Running next control command for state %s.", 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_unit_debug(u, "Got final SIGCHLD for state %s.", 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
+ (void) service_search_main_pid(s);
+
+ service_enter_start_post(s);
+ break;
+
+ case SERVICE_START_POST:
+ if (f != SERVICE_SUCCESS) {
+ service_enter_signal(s, SERVICE_STOP_SIGTERM, 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
+ (void) 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);
+ (void) 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_SIGABRT:
+ 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:
+ if (main_pid_good(s) <= 0)
+ 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);
+
+ /* We got one SIGCHLD for the service, let's watch all
+ * processes that are now running of the service, and watch
+ * that. Among the PIDs we then watch will be children
+ * reassigned to us, which hopefully allows us to identify
+ * when all children are gone */
+ unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
+ unit_watch_all_pids(u);
+
+ /* If the PID set is empty now, then let's finish this off */
+ if (set_isempty(u->pids))
+ service_notify_cgroup_empty_event(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_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
+ service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_START_POST:
+ log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
+ service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_RUNNING:
+ log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
+ service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_RELOAD:
+ log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
+ service_kill_control_processes(s);
+ s->reload_result = SERVICE_FAILURE_TIMEOUT;
+ service_enter_running(s, SERVICE_SUCCESS);
+ break;
+
+ case SERVICE_STOP:
+ log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
+ service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_STOP_SIGABRT:
+ log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
+ service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_STOP_SIGTERM:
+ if (s->kill_context.send_sigkill) {
+ log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
+ service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
+ } else {
+ log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
+ 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_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
+ service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_STOP_POST:
+ log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
+ service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
+ break;
+
+ case SERVICE_FINAL_SIGTERM:
+ if (s->kill_context.send_sigkill) {
+ log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
+ service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
+ } else {
+ log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
+ service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
+ }
+
+ break;
+
+ case SERVICE_FINAL_SIGKILL:
+ log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
+ service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
+ break;
+
+ case SERVICE_AUTO_RESTART:
+ log_unit_info(UNIT(s),
+ s->restart_usec > 0 ?
+ "Service hold-off time over, scheduling restart." :
+ "Service has no hold-off time, scheduling restart.");
+ 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);
+ char t[FORMAT_TIMESPAN_MAX];
+
+ assert(s);
+ assert(source == s->watchdog_event_source);
+
+ log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
+ format_timespan(t, sizeof(t), s->watchdog_usec, 1));
+
+ service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
+
+ return 0;
+}
+
+static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
+ Service *s = SERVICE(u);
+ _cleanup_free_ char *cc = NULL;
+ bool notify_dbus = false;
+ const char *e;
+
+ assert(u);
+
+ cc = strv_join(tags, ", ");
+
+ if (s->notify_access == NOTIFY_NONE) {
+ log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
+ return;
+ } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
+ if (s->main_pid != 0)
+ log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
+ else
+ log_unit_debug(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
+ return;
+ } else
+ log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
+
+ /* Interpret MAINPID= */
+ e = strv_find_startswith(tags, "MAINPID=");
+ if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
+ if (parse_pid(e, &pid) < 0)
+ log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
+ else {
+ service_set_main_pid(s, pid);
+ unit_watch_pid(UNIT(s), pid);
+ notify_dbus = true;
+ }
+ }
+
+ /* Interpret RELOADING= */
+ if (strv_find(tags, "RELOADING=1")) {
+
+ s->notify_state = NOTIFY_RELOADING;
+
+ if (s->state == SERVICE_RUNNING)
+ service_enter_reload_by_notify(s);
+
+ notify_dbus = true;
+ }
+
+ /* Interpret READY= */
+ if (strv_find(tags, "READY=1")) {
+
+ s->notify_state = NOTIFY_READY;
+
+ /* Type=notify services inform us about completed
+ * initialization with READY=1 */
+ if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
+ service_enter_start_post(s);
+
+ /* Sending READY=1 while we are reloading informs us
+ * that the reloading is complete */
+ if (s->state == SERVICE_RELOAD && s->control_pid == 0)
+ service_enter_running(s, SERVICE_SUCCESS);
+
+ notify_dbus = true;
+ }
+
+ /* Interpret STOPPING= */
+ if (strv_find(tags, "STOPPING=1")) {
+
+ s->notify_state = NOTIFY_STOPPING;
+
+ if (s->state == SERVICE_RUNNING)
+ service_enter_stop_by_notify(s);
+
+ notify_dbus = true;
+ }
+
+ /* Interpret STATUS= */
+ e = strv_find_startswith(tags, "STATUS=");
+ if (e) {
+ _cleanup_free_ char *t = NULL;
+
+ if (!isempty(e)) {
+ if (!utf8_is_valid(e))
+ log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
+ else {
+ t = strdup(e);
+ if (!t)
+ log_oom();
+ }
+ }
+
+ if (!streq_ptr(s->status_text, t)) {
+
+ free(s->status_text);
+ s->status_text = t;
+ t = NULL;
+
+ notify_dbus = true;
+ }
+ }
+
+ /* Interpret ERRNO= */
+ e = strv_find_startswith(tags, "ERRNO=");
+ if (e) {
+ int status_errno;
+
+ if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
+ log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
+ else {
+ if (s->status_errno != status_errno) {
+ s->status_errno = status_errno;
+ notify_dbus = true;
+ }
+ }
+ }
+
+ /* Interpret WATCHDOG= */
+ if (strv_find(tags, "WATCHDOG=1"))
+ service_reset_watchdog(s);
+
+ if (strv_find(tags, "FDSTORE=1")) {
+ const char *name;
+
+ name = strv_find_startswith(tags, "FDNAME=");
+ if (name && !fdname_is_valid(name)) {
+ log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
+ name = NULL;
+ }
+
+ service_add_fd_store_set(s, fds, name);
+ }
+
+ /* Notify clients about changed status or main pid */
+ if (notify_dbus)
+ unit_add_to_dbus_queue(u);
+}
+
+static int service_get_timeout(Unit *u, usec_t *timeout) {
+ Service *s = SERVICE(u);
+ uint64_t t;
+ int r;
+
+ if (!s->timer_event_source)
+ return 0;
+
+ r = sd_event_source_get_time(s->timer_event_source, &t);
+ if (r < 0)
+ return r;
+ if (t == USEC_INFINITY)
+ return 0;
+
+ *timeout = t;
+ return 1;
+}
+
+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_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
+ else if (old_owner)
+ log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
+ else
+ log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
+
+ s->bus_name_good = !!new_owner;
+
+ /* Track the current owner, so we can reconstruct changes after a daemon reload */
+ r = free_and_strdup(&s->bus_name_owner, new_owner);
+ if (r < 0) {
+ log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
+ return;
+ }
+
+ 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_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
+ pid_t pid;
+
+ /* Try to acquire PID from bus service */
+
+ r = sd_bus_get_name_creds(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_unit_debug(u, "D-Bus name %s is now owned by process %u", 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, bool selinux_context_net) {
+ _cleanup_free_ char *peer = NULL;
+ int r;
+
+ 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;
+
+ if (getpeername_pretty(fd, true, &peer) >= 0) {
+
+ if (UNIT(s)->description) {
+ _cleanup_free_ char *a;
+
+ a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
+ if (!a)
+ return -ENOMEM;
+
+ r = unit_set_description(UNIT(s), a);
+ } else
+ r = unit_set_description(UNIT(s), peer);
+
+ if (r < 0)
+ return r;
+ }
+
+ s->socket_fd = fd;
+ s->socket_fd_selinux_context_net = selinux_context_net;
+
+ 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;
+}
+
+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_restart_table[_SERVICE_RESTART_MAX] = {
+ [SERVICE_RESTART_NO] = "no",
+ [SERVICE_RESTART_ON_SUCCESS] = "on-success",
+ [SERVICE_RESTART_ON_FAILURE] = "on-failure",
+ [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
+ [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 notify_state_table[_NOTIFY_STATE_MAX] = {
+ [NOTIFY_UNKNOWN] = "unknown",
+ [NOTIFY_READY] = "ready",
+ [NOTIFY_RELOADING] = "reloading",
+ [NOTIFY_STOPPING] = "stopping",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
+
+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",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
+
+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,
+ .release_resources = service_release_resources,
+
+ .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,
+
+ .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_vtable = bus_service_vtable,
+ .bus_set_property = bus_service_set_property,
+ .bus_commit_properties = bus_service_commit_properties,
+
+ .get_timeout = service_get_timeout,
+ .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.",
+ },
+ .finished_stop_job = {
+ [JOB_DONE] = "Stopped %s.",
+ [JOB_FAILED] = "Stopped (with error) %s.",
+ },
+ },
+};