diff options
Diffstat (limited to 'src/core/service.c')
| -rw-r--r-- | src/core/service.c | 3469 |
1 files changed, 0 insertions, 3469 deletions
diff --git a/src/core/service.c b/src/core/service.c deleted file mode 100644 index a7274a758f..0000000000 --- a/src/core/service.c +++ /dev/null @@ -1,3469 +0,0 @@ -/*** - 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->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; -} - -void service_close_socket_fd(Service *s) { - assert(s); - - /* Undo the effect of service_set_socket_fd(). */ - - s->socket_fd = asynchronous_close(s->socket_fd); - - if (UNIT_ISSET(s->accept_socket)) { - 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 usec_t service_get_watchdog_usec(Service *s) { - assert(s); - - if (s->watchdog_override_enable) - return s->watchdog_override_usec; - else - return s->watchdog_usec; -} - -static void service_start_watchdog(Service *s) { - int r; - usec_t watchdog_usec; - - assert(s); - - watchdog_usec = service_get_watchdog_usec(s); - if (watchdog_usec == 0 || watchdog_usec == USEC_INFINITY) - return; - - if (s->watchdog_event_source) { - r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, 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, 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_reset_watchdog_timeout(Service *s, usec_t watchdog_override_usec) { - assert(s); - - s->watchdog_override_enable = true; - s->watchdog_override_usec = watchdog_override_usec; - service_reset_watchdog(s); - - log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec); - log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec); -} - -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_fd_store(Service *s) { - assert(s); - - log_unit_debug(UNIT(s), "Releasing all stored fds"); - while (s->fd_store) - service_fd_store_unlink(s->fd_store); - - assert(s->n_fd_store == 0); -} - -static void service_release_resources(Unit *u, bool inactive) { - 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 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); - - if (inactive) - service_release_fd_store(s); -} - -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; - - dynamic_creds_unref(&s->dynamic_creds); - - 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); - - service_close_socket_fd(s); - s->peer = socket_peer_unref(s->peer); - - 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, true); -} - -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 */ - log_unit_debug(UNIT(fs->service), - "Received %s on stored fd %d (%s), closing.", - revents & EPOLLERR ? "EPOLLERR" : "EPOLLHUP", - fs->fd, strna(fs->fdname)); - service_fd_store_unlink(fs); - return 0; -} - -static int service_add_fd_store(Service *s, int fd, const char *name) { - ServiceFDStore *fs; - int r; - - /* fd is always consumed if we return >= 0 */ - - assert(s); - assert(fd >= 0); - - if (s->n_fd_store >= s->n_fd_store_max) - return -EXFULL; /* Our store is full. - * Use this errno rather than E[NM]FILE to distinguish from - * the case where systemd itself hits the file limit. */ - - LIST_FOREACH(fd_store, fs, s->fd_store) { - r = same_fd(fs->fd, fd); - if (r < 0) - return r; - if (r > 0) { - safe_close(fd); - return 0; /* fd already included */ - } - } - - 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; /* fd newly stored */ -} - -static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) { - int r; - - assert(s); - - while (fdset_size(fds) > 0) { - _cleanup_close_ int fd = -1; - - fd = fdset_steal_first(fds); - if (fd < 0) - break; - - r = service_add_fd_store(s, fd, name); - if (r == -EXFULL) - return log_unit_warning_errno(UNIT(s), r, - "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.", - s->n_fd_store_max); - if (r < 0) - return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m"); - if (r > 0) - log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name)); - fd = -1; - } - - 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 (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { - /* 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; - - 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)); - - if (UNIT_ISSET(s->accept_socket)) - fprintf(f, - "%sAccept Socket: %s\n", - prefix, UNIT_DEREF(s->accept_socket)->id); - - 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 void 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; - - if (!s->guess_main_pid) - return; - - assert(s->main_pid <= 0); - - if (unit_search_main_pid(UNIT(s), &pid) < 0) - return; - - log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid); - if (service_set_main_pid(s, pid) < 0) - return; - - 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); -} - -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); - - 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 && !MANAGER_IS_RELOADING(UNIT(s)->manager)) - 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); - - if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) - (void) unit_setup_dynamic_creds(u); - - if (UNIT_ISSET(s->accept_socket)) { - Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket)); - - if (socket->max_connections_per_source > 0) { - SocketPeer *peer; - - /* Make a best-effort attempt at bumping the connection count */ - if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) { - socket_peer_unref(s->peer); - s->peer = peer; - } - } - } - - 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, - ExecFlags flags, - pid_t *_pid) { - - _cleanup_strv_free_ char **argv = NULL, **final_env = NULL, **our_env = NULL, **fd_names = NULL; - _cleanup_free_ int *fds = NULL; - unsigned n_fds = 0, n_env = 0; - const char *path; - pid_t pid; - - ExecParameters exec_params = { - .flags = flags, - .stdin_fd = -1, - .stdout_fd = -1, - .stderr_fd = -1, - }; - - int r; - - assert(s); - assert(c); - assert(_pid); - - if (flags & EXEC_IS_CONTROL) { - /* If this is a control process, mask the permissions/chroot application if this is requested. */ - if (s->permissions_start_only) - exec_params.flags &= ~EXEC_APPLY_PERMISSIONS; - if (s->root_directory_start_only) - exec_params.flags &= ~EXEC_APPLY_CHROOT; - } - - (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; - - r = unit_setup_dynamic_creds(UNIT(s)); - if (r < 0) - return r; - - if ((flags & EXEC_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; - log_unit_debug(UNIT(s), "Passing %i fds to service", n_fds); - } - - 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*, 9); - if (!our_env) - return -ENOMEM; - - if ((flags & EXEC_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 (MANAGER_IS_USER(UNIT(s)->manager)) - 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) { - r = -errno; - - /* ENOTCONN is legitimate if the endpoint disappeared on shutdown. - * This connection is over, but the socket unit lives on. */ - if (r != -ENOTCONN || !IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST)) - return r; - } - - if (r == 0 && 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; - } - } - - if (flags & EXEC_SETENV_RESULT) { - if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0) - return -ENOMEM; - - if (s->main_exec_status.pid > 0 && - dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) { - if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0) - return -ENOMEM; - - if (s->main_exec_status.code == CLD_EXITED) - r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status); - else - r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status)); - if (r < 0) - return -ENOMEM; - } - } - - final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL); - if (!final_env) - return -ENOMEM; - - if ((flags & EXEC_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; - - exec_params.argv = argv; - exec_params.environment = final_env; - exec_params.fds = fds; - exec_params.fd_names = fd_names; - exec_params.n_fds = n_fds; - exec_params.flags |= UNIT(s)->manager->confirm_spawn ? EXEC_CONFIRM_SPAWN : 0; - 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.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, - &s->dynamic_creds, - &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 (s->result == 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)); - emergency_action(UNIT(s)->manager, s->emergency_action, UNIT(s)->reboot_arg, "service failed"); - } - - 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 */ - exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager)); - - /* Get rid of the IPC bits of the user */ - unit_unref_uid_gid(UNIT(s), true); - - /* Release the user, and destroy it if we are the only remaining owner */ - dynamic_creds_destroy(&s->dynamic_creds); - - /* 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 (s->result == 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, - EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT, - &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 (s->result == 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 (s->result == 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, - EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT, - &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 (s->result == 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, - EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL, - &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, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, 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) { - if (s->type != SERVICE_ONESHOT) { - /* There's no command line configured for the main command? Hmm, that is strange. This can only - * happen if the configuration changes at runtime. In this case, let's enter a failure - * state. */ - log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m"); - r = -ENXIO; - goto fail; - } - - 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, - EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG, - &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, - EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN, - &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, - EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL, - &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, - EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL| - (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)| - (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0), - &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, - EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG, - &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); - int r; - - 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)); - - /* Make sure we don't enter a busy loop of some kind. */ - r = unit_start_limit_test(u); - if (r < 0) { - service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false); - return r; - } - - r = unit_acquire_invocation_id(u); - if (r < 0) - 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; - s->reset_cpu_usage = true; - - s->status_text = mfree(s->status_text); - s->status_errno = 0; - - s->notify_state = NOTIFY_UNKNOWN; - - s->watchdog_override_enable = false; - s->watchdog_override_usec = 0; - - 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; - - if (UNIT_ISSET(s->accept_socket)) { - r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id); - if (r < 0) - return r; - } - - r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_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); - } - } - - dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp); - - unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart)); - - if (s->watchdog_override_enable) - unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec); - - 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, "accept-socket")) { - Unit *socket; - - r = manager_load_unit(u->manager, value, NULL, NULL, &socket); - if (r < 0) - log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value); - else { - unit_ref_set(&s->accept_socket, socket); - SOCKET(socket)->n_connections++; - } - - } 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, "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 - 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 if (streq(key, "watchdog-override-usec")) { - usec_t watchdog_override_usec; - if (timestamp_deserialize(value, &watchdog_override_usec) < 0) - log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value); - else { - s->watchdog_override_enable = true; - s->watchdog_override_usec = watchdog_override_usec; - } - } 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 (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &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; - } - - /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure - * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption - * that the service already logged the reason at a higher log level on its own. However, if the service - * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise - * our log level to WARNING then. */ - - log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG : - (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING), - 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 (s->result == 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 (s->result == 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 - 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 - service_search_main_pid(s); - - service_enter_running(s, SERVICE_SUCCESS); - break; - - case SERVICE_RELOAD: - if (f == SERVICE_SUCCESS) - if (service_load_pid_file(s, true) < 0) - 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 - (On unified we use proper notifications) */ - if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) <= 0 && 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]; - usec_t watchdog_usec; - - assert(s); - assert(source == s->watchdog_event_source); - - watchdog_usec = service_get_watchdog_usec(s); - - log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!", - format_timespan(t, sizeof(t), 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_and_replace(s->status_text, t); - - 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); - } - - e = strv_find_startswith(tags, "WATCHDOG_USEC="); - if (e) { - usec_t watchdog_override_usec; - if (safe_atou64(e, &watchdog_override_usec) < 0) - log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e); - else - service_reset_watchdog_timeout(s, watchdog_override_usec); - } - - /* 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. We take ownership of the passed fd on success. */ - - 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; - } - - r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false); - 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 0; -} - -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 int service_main_pid(Unit *u) { - Service *s = SERVICE(u); - - assert(s); - - return s->main_pid; -} - -static int service_control_pid(Unit *u) { - Service *s = SERVICE(u); - - assert(s); - - return s->control_pid; -} - -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", - [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit", -}; - -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), - .dynamic_creds_offset = offsetof(Service, dynamic_creds), - - .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, - - .main_pid = service_main_pid, - .control_pid = service_control_pid, - - .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.", - }, - }, -}; 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