/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <signal.h> #include <dirent.h> #include <unistd.h> #include "unit.h" #include "service.h" #include "load-fragment.h" #include "load-dropin.h" #include "log.h" #include "strv.h" #include "unit-name.h" #include "dbus-service.h" #include "special.h" #include "bus-errors.h" #define COMMENTS "#;\n" #define NEWLINES "\n\r" #ifdef HAVE_SYSV_COMPAT #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE) typedef enum RunlevelType { RUNLEVEL_UP, RUNLEVEL_DOWN, RUNLEVEL_SYSINIT } RunlevelType; static const struct { const char *path; const char *target; const RunlevelType type; } rcnd_table[] = { /* Standard SysV runlevels for start-up */ { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP }, { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP }, { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP }, { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP }, { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP }, #ifdef TARGET_SUSE /* SUSE style boot.d */ { "boot.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT }, #endif #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) /* Debian style rcS.d */ { "rcS.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT }, #endif /* Standard SysV runlevels for shutdown */ { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN }, { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN } /* Note that the order here matters, as we read the directories in this order, and we want to make sure that sysv_start_priority is known when we first load the unit. And that value we only know from S links. Hence UP/SYSINIT must be read before DOWN */ }; #define RUNLEVELS_UP "12345" /* #define RUNLEVELS_DOWN "06" */ /* #define RUNLEVELS_BOOT "bBsS" */ #endif static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { [SERVICE_DEAD] = UNIT_INACTIVE, [SERVICE_START_PRE] = UNIT_ACTIVATING, [SERVICE_START] = UNIT_ACTIVATING, [SERVICE_START_POST] = UNIT_ACTIVATING, [SERVICE_RUNNING] = UNIT_ACTIVE, [SERVICE_EXITED] = UNIT_ACTIVE, [SERVICE_RELOAD] = UNIT_RELOADING, [SERVICE_STOP] = UNIT_DEACTIVATING, [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, [SERVICE_STOP_POST] = UNIT_DEACTIVATING, [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, [SERVICE_FAILED] = UNIT_FAILED, [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING }; static void service_init(Unit *u) { Service *s = SERVICE(u); assert(u); assert(u->meta.load_state == UNIT_STUB); s->timeout_usec = DEFAULT_TIMEOUT_USEC; s->restart_usec = DEFAULT_RESTART_USEC; s->timer_watch.type = WATCH_INVALID; #ifdef HAVE_SYSV_COMPAT s->sysv_start_priority = -1; #endif s->socket_fd = -1; exec_context_init(&s->exec_context); RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5); 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 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 (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.", s->meta.id, (unsigned long) pid); s->main_pid = pid; s->main_pid_known = true; exec_status_start(&s->main_exec_status, pid); return 0; } static void service_close_socket_fd(Service *s) { assert(s); if (s->socket_fd < 0) return; close_nointr_nofail(s->socket_fd); s->socket_fd = -1; } static void service_connection_unref(Service *s) { assert(s); if (!s->accept_socket) return; socket_connection_unref(s->accept_socket); s->accept_socket = NULL; } static void service_done(Unit *u) { Service *s = SERVICE(u); assert(s); free(s->pid_file); s->pid_file = NULL; #ifdef HAVE_SYSV_COMPAT free(s->sysv_path); s->sysv_path = NULL; free(s->sysv_runlevels); s->sysv_runlevels = NULL; #endif free(s->status_text); s->status_text = NULL; exec_context_done(&s->exec_context); exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX); s->control_command = NULL; /* This will leak a process, but at least no memory or any of * our resources */ service_unwatch_main_pid(s); service_unwatch_control_pid(s); if (s->bus_name) { unit_unwatch_bus_name(UNIT(u), s->bus_name); free(s->bus_name); s->bus_name = NULL; } service_close_socket_fd(s); service_connection_unref(s); set_free(s->configured_sockets); unit_unwatch_timer(u, &s->timer_watch); } #ifdef HAVE_SYSV_COMPAT static char *sysv_translate_name(const char *name) { char *r; if (!(r = new(char, strlen(name) + sizeof(".service")))) return NULL; if (startswith(name, "boot.")) /* Drop SuSE-style boot. prefix */ strcpy(stpcpy(r, name + 5), ".service"); else if (endswith(name, ".sh")) /* Drop Debian-style .sh suffix */ strcpy(stpcpy(r, name) - 3, ".service"); #ifdef TARGET_ARCH else if (startswith(name, "@")) /* Drop Arch-style background prefix */ strcpy(stpcpy(r, name + 1), ".service"); #endif else /* Normal init scripts */ strcpy(stpcpy(r, name), ".service"); return r; } static int sysv_translate_facility(const char *name, const char *filename, char **_r) { /* We silently ignore the $ prefix here. According to the LSB * spec it simply indicates whether something is a * standardized name or a distribution-specific one. Since we * just follow what already exists and do not introduce new * uses or names we don't care who introduced a new name. */ static const char * const table[] = { /* LSB defined facilities */ "local_fs", SPECIAL_LOCAL_FS_TARGET, "network", SPECIAL_NETWORK_TARGET, "named", SPECIAL_NSS_LOOKUP_TARGET, "portmap", SPECIAL_RPCBIND_TARGET, "remote_fs", SPECIAL_REMOTE_FS_TARGET, "syslog", SPECIAL_SYSLOG_TARGET, "time", SPECIAL_RTC_SET_TARGET, /* Debian extensions */ #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET, #endif "mail-transfer-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET, "x-display-manager", SPECIAL_DISPLAY_MANAGER_SERVICE, #ifdef TARGET_FEDORA /* Fedora extensions */ "MTA", SPECIAL_MAIL_TRANSFER_AGENT_TARGET, "smtpdaemon", SPECIAL_MAIL_TRANSFER_AGENT_TARGET, "httpd", SPECIAL_HTTP_DAEMON_TARGET, #endif /* SuSE extensions */ "null", NULL }; unsigned i; char *r; const char *n; assert(name); assert(_r); n = *name == '$' ? name + 1 : name; for (i = 0; i < ELEMENTSOF(table); i += 2) { if (!streq(table[i], n)) continue; if (!table[i+1]) return 0; if (!(r = strdup(table[i+1]))) return -ENOMEM; goto finish; } /* If we don't know this name, fallback heuristics to figure * out whether something is a target or a service alias. */ if (*name == '$') /* Facilities starting with $ are most likely targets */ r = unit_name_build(n, NULL, ".target"); else if (filename && streq(name, filename)) /* Names equalling the file name of the services are redundant */ return 0; else /* Everything else we assume to be normal service names */ r = sysv_translate_name(n); if (!r) return -ENOMEM; finish: if (_r) *_r = r; return 1; } static int sysv_fix_order(Service *s) { Meta *other; int r; assert(s); if (s->sysv_start_priority < 0) return 0; /* For each pair of services where at least one lacks a LSB * header, we use the start priority value to order things. */ LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) { Service *t; UnitDependency d; bool special_s, special_t; t = (Service*) other; if (s == t) continue; if (t->meta.load_state != UNIT_LOADED) continue; if (t->sysv_start_priority < 0) continue; /* If both units have modern headers we don't care * about the priorities */ if ((s->meta.fragment_path || s->sysv_has_lsb) && (t->meta.fragment_path || t->sysv_has_lsb)) continue; special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels); special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels); if (special_t && !special_s) d = UNIT_AFTER; else if (special_s && !special_t) d = UNIT_BEFORE; else if (t->sysv_start_priority < s->sysv_start_priority) d = UNIT_AFTER; else if (t->sysv_start_priority > s->sysv_start_priority) d = UNIT_BEFORE; else continue; /* FIXME: Maybe we should compare the name here lexicographically? */ if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0) return r; } return 0; } static ExecCommand *exec_command_new(const char *path, const char *arg1) { ExecCommand *c; if (!(c = new0(ExecCommand, 1))) return NULL; if (!(c->path = strdup(path))) { free(c); return NULL; } if (!(c->argv = strv_new(path, arg1, NULL))) { free(c->path); free(c); return NULL; } return c; } static int sysv_exec_commands(Service *s) { ExecCommand *c; assert(s); assert(s->sysv_path); if (!(c = exec_command_new(s->sysv_path, "start"))) return -ENOMEM; exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c); if (!(c = exec_command_new(s->sysv_path, "stop"))) return -ENOMEM; exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c); if (!(c = exec_command_new(s->sysv_path, "reload"))) return -ENOMEM; exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c); return 0; } static int service_load_sysv_path(Service *s, const char *path) { FILE *f; Unit *u; unsigned line = 0; int r; enum { NORMAL, DESCRIPTION, LSB, LSB_DESCRIPTION } state = NORMAL; char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description; assert(s); assert(path); u = UNIT(s); if (!(f = fopen(path, "re"))) { r = errno == ENOENT ? 0 : -errno; goto finish; } free(s->sysv_path); if (!(s->sysv_path = strdup(path))) { r = -ENOMEM; goto finish; } while (!feof(f)) { char l[LINE_MAX], *t; if (!fgets(l, sizeof(l), f)) { if (feof(f)) break; r = -errno; log_error("Failed to read configuration file '%s': %s", path, strerror(-r)); goto finish; } line++; t = strstrip(l); if (*t != '#') continue; if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) { state = LSB; s->sysv_has_lsb = true; continue; } if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) { state = NORMAL; continue; } t++; t += strspn(t, WHITESPACE); if (state == NORMAL) { /* Try to parse Red Hat style chkconfig headers */ if (startswith_no_case(t, "chkconfig:")) { int start_priority; char runlevels[16], *k; state = NORMAL; if (sscanf(t+10, "%15s %i %*i", runlevels, &start_priority) != 2) { log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line); continue; } /* A start priority gathered from the * symlink farms is preferred over the * data from the LSB header. */ if (start_priority < 0 || start_priority > 99) log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line); else if (s->sysv_start_priority < 0) s->sysv_start_priority = start_priority; char_array_0(runlevels); k = delete_chars(runlevels, WHITESPACE "-"); if (k[0]) { char *d; if (!(d = strdup(k))) { r = -ENOMEM; goto finish; } free(s->sysv_runlevels); s->sysv_runlevels = d; } } else if (startswith_no_case(t, "description:")) { size_t k = strlen(t); char *d; const char *j; if (t[k-1] == '\\') { state = DESCRIPTION; t[k-1] = 0; } if ((j = strstrip(t+12)) && *j) { if (!(d = strdup(j))) { r = -ENOMEM; goto finish; } } else d = NULL; free(chkconfig_description); chkconfig_description = d; } else if (startswith_no_case(t, "pidfile:")) { char *fn; state = NORMAL; fn = strstrip(t+8); if (!path_is_absolute(fn)) { log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line); continue; } if (!(fn = strdup(fn))) { r = -ENOMEM; goto finish; } free(s->pid_file); s->pid_file = fn; } } else if (state == DESCRIPTION) { /* Try to parse Red Hat style description * continuation */ size_t k = strlen(t); char *j; if (t[k-1] == '\\') t[k-1] = 0; else state = NORMAL; if ((j = strstrip(t)) && *j) { char *d = NULL; if (chkconfig_description) asprintf(&d, "%s %s", chkconfig_description, j); else d = strdup(j); if (!d) { r = -ENOMEM; goto finish; } free(chkconfig_description); chkconfig_description = d; } } else if (state == LSB || state == LSB_DESCRIPTION) { if (startswith_no_case(t, "Provides:")) { char *i, *w; size_t z; state = LSB; FOREACH_WORD_QUOTED(w, z, t+9, i) { char *n, *m; if (!(n = strndup(w, z))) { r = -ENOMEM; goto finish; } r = sysv_translate_facility(n, file_name_from_path(path), &m); free(n); if (r < 0) goto finish; if (r == 0) continue; if (unit_name_to_type(m) == UNIT_SERVICE) r = unit_add_name(u, m); else { r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true); if (s->sysv_enabled) { int k; if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0) r = k; } } if (r < 0) log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r)); free(m); } } else if (startswith_no_case(t, "Required-Start:") || startswith_no_case(t, "Should-Start:") || startswith_no_case(t, "X-Start-Before:") || startswith_no_case(t, "X-Start-After:")) { char *i, *w; size_t z; state = LSB; FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) { char *n, *m; if (!(n = strndup(w, z))) { r = -ENOMEM; goto finish; } r = sysv_translate_facility(n, file_name_from_path(path), &m); free(n); if (r < 0) goto finish; if (r == 0) continue; r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true); if (r < 0) log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r)); free(m); } } else if (startswith_no_case(t, "Default-Start:")) { char *k, *d; state = LSB; k = delete_chars(t+14, WHITESPACE "-"); if (k[0] != 0) { if (!(d = strdup(k))) { r = -ENOMEM; goto finish; } free(s->sysv_runlevels); s->sysv_runlevels = d; } } else if (startswith_no_case(t, "Description:")) { char *d, *j; state = LSB_DESCRIPTION; if ((j = strstrip(t+12)) && *j) { if (!(d = strdup(j))) { r = -ENOMEM; goto finish; } } else d = NULL; free(long_description); long_description = d; } else if (startswith_no_case(t, "Short-Description:")) { char *d, *j; state = LSB; if ((j = strstrip(t+18)) && *j) { if (!(d = strdup(j))) { r = -ENOMEM; goto finish; } } else d = NULL; free(short_description); short_description = d; } else if (startswith_no_case(t, "X-Interactive:")) { int b; if ((b = parse_boolean(strstrip(t+14))) < 0) { log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line); continue; } if (b) s->exec_context.std_input = EXEC_INPUT_TTY; else s->exec_context.std_input = EXEC_INPUT_NULL; } else if (state == LSB_DESCRIPTION) { if (startswith(l, "#\t") || startswith(l, "# ")) { char *j; if ((j = strstrip(t)) && *j) { char *d = NULL; if (long_description) asprintf(&d, "%s %s", long_description, t); else d = strdup(j); if (!d) { r = -ENOMEM; goto finish; } free(long_description); long_description = d; } } else state = LSB; } } } if ((r = sysv_exec_commands(s)) < 0) goto finish; if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) { /* If there a runlevels configured for this service * but none of the standard ones, then we assume this * is some special kind of service (which might be * needed for early boot) and don't create any links * to it. */ s->meta.default_dependencies = false; /* Don't timeout special services during boot (like fsck) */ s->timeout_usec = 0; } else s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC; /* Special setting for all SysV services */ s->type = SERVICE_FORKING; s->remain_after_exit = true; s->restart = SERVICE_RESTART_NO; s->exec_context.std_output = (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY) ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL; s->exec_context.kill_mode = KILL_PROCESS_GROUP; /* We use the long description only if * no short description is set. */ if (short_description) description = short_description; else if (chkconfig_description) description = chkconfig_description; else if (long_description) description = long_description; else description = NULL; if (description) { char *d; if (!(d = strappend("LSB: ", description))) { r = -ENOMEM; goto finish; } u->meta.description = d; } u->meta.load_state = UNIT_LOADED; r = 0; finish: if (f) fclose(f); free(short_description); free(long_description); free(chkconfig_description); return r; } static int service_load_sysv_name(Service *s, const char *name) { char **p; assert(s); assert(name); /* For SysV services we strip the boot. or .sh * prefixes/suffixes. */ if (startswith(name, "boot.") || endswith(name, ".sh.service")) return -ENOENT; STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) { char *path; int r; if (asprintf(&path, "%s/%s", *p, name) < 0) return -ENOMEM; assert(endswith(path, ".service")); path[strlen(path)-8] = 0; r = service_load_sysv_path(s, path); if (r >= 0 && s->meta.load_state == UNIT_STUB) { /* Try Debian style xxx.sh source'able init scripts */ strcat(path, ".sh"); r = service_load_sysv_path(s, path); } free(path); if (r >= 0 && s->meta.load_state == UNIT_STUB) { /* Try SUSE style boot.xxx init scripts */ if (asprintf(&path, "%s/boot.%s", *p, name) < 0) return -ENOMEM; path[strlen(path)-8] = 0; r = service_load_sysv_path(s, path); free(path); } if (r < 0) return r; if ((s->meta.load_state != UNIT_STUB)) break; } return 0; } static int service_load_sysv(Service *s) { const char *t; Iterator i; int r; assert(s); /* Load service data from SysV init scripts, preferably with * LSB headers ... */ if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path)) return 0; if ((t = s->meta.id)) if ((r = service_load_sysv_name(s, t)) < 0) return r; if (s->meta.load_state == UNIT_STUB) SET_FOREACH(t, s->meta.names, i) { if (t == s->meta.id) continue; if ((r = service_load_sysv_name(s, t)) < 0) return r; if (s->meta.load_state != UNIT_STUB) break; } return 0; } #endif static int fsck_fix_order(Service *s) { Meta *other; int r; assert(s); if (s->fsck_passno <= 0) return 0; /* For each pair of services where both have an fsck priority * we order things based on it. */ LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) { Service *t; UnitDependency d; t = (Service*) other; if (s == t) continue; if (t->meta.load_state != UNIT_LOADED) continue; if (t->fsck_passno <= 0) continue; if (t->fsck_passno < s->fsck_passno) d = UNIT_AFTER; else if (t->fsck_passno > s->fsck_passno) d = UNIT_BEFORE; else continue; if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0) return r; } return 0; } static int service_verify(Service *s) { assert(s); if (s->meta.load_state != UNIT_LOADED) return 0; if (!s->exec_command[SERVICE_EXEC_START]) { log_error("%s lacks ExecStart setting. Refusing.", s->meta.id); return -EINVAL; } if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) { log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id); return -EINVAL; } if (s->type == SERVICE_DBUS && !s->bus_name) { log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id); return -EINVAL; } if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) { log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id); return -EINVAL; } return 0; } static int service_add_default_dependencies(Service *s) { int r; assert(s); /* Add a number of automatic dependencies useful for the * majority of services. */ /* First, pull in base system */ if (s->meta.manager->running_as == MANAGER_SYSTEM) { if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0) return r; } else if (s->meta.manager->running_as == MANAGER_USER) { if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0) return r; } /* Second, activate normal shutdown */ return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); } static int service_load(Unit *u) { int r; Service *s = SERVICE(u); assert(s); /* Load a .service file */ if ((r = unit_load_fragment(u)) < 0) return r; #ifdef HAVE_SYSV_COMPAT /* Load a classic init script as a fallback, if we couldn't find anything */ if (u->meta.load_state == UNIT_STUB) if ((r = service_load_sysv(s)) < 0) return r; #endif /* Still nothing found? Then let's give up */ if (u->meta.load_state == UNIT_STUB) return -ENOENT; /* We were able to load something, then let's add in the * dropin directories. */ if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) return r; /* This is a new unit? Then let's add in some extras */ if (u->meta.load_state == UNIT_LOADED) { if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) return r; if ((r = unit_add_default_cgroup(u)) < 0) return r; #ifdef HAVE_SYSV_COMPAT if ((r = sysv_fix_order(s)) < 0) return r; #endif if ((r = fsck_fix_order(s)) < 0) return r; if (s->bus_name) if ((r = unit_watch_bus_name(u, s->bus_name)) < 0) return r; if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE) s->notify_access = NOTIFY_MAIN; if (s->type == SERVICE_DBUS || s->bus_name) if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0) return r; if (s->meta.default_dependencies) if ((r = service_add_default_dependencies(s)) < 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; char *p2; assert(s); p2 = strappend(prefix, "\t"); prefix2 = p2 ? p2 : prefix; fprintf(f, "%sService State: %s\n" "%sPermissionsStartOnly: %s\n" "%sRootDirectoryStartOnly: %s\n" "%sRemainAfterExit: %s\n" "%sType: %s\n" "%sRestart: %s\n" "%sNotifyAccess: %s\n", prefix, service_state_to_string(s->state), prefix, yes_no(s->permissions_start_only), prefix, yes_no(s->root_directory_start_only), prefix, yes_no(s->remain_after_exit), prefix, service_type_to_string(s->type), prefix, service_restart_to_string(s->restart), prefix, notify_access_to_string(s->notify_access)); if (s->control_pid > 0) fprintf(f, "%sControl PID: %lu\n", prefix, (unsigned long) s->control_pid); if (s->main_pid > 0) fprintf(f, "%sMain PID: %lu\n", prefix, (unsigned long) s->main_pid); 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)); exec_context_dump(&s->exec_context, f, prefix); for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) { if (!s->exec_command[c]) continue; fprintf(f, "%s-> %s:\n", prefix, service_exec_command_to_string(c)); exec_command_dump_list(s->exec_command[c], f, prefix2); } #ifdef HAVE_SYSV_COMPAT if (s->sysv_path) fprintf(f, "%sSysV Init Script Path: %s\n" "%sSysV Init Script has LSB Header: %s\n" "%sSysVEnabled: %s\n", prefix, s->sysv_path, prefix, yes_no(s->sysv_has_lsb), prefix, yes_no(s->sysv_enabled)); if (s->sysv_start_priority >= 0) fprintf(f, "%sSysVStartPriority: %i\n", prefix, s->sysv_start_priority); if (s->sysv_runlevels) fprintf(f, "%sSysVRunLevels: %s\n", prefix, s->sysv_runlevels); #endif if (s->fsck_passno > 0) fprintf(f, "%sFsckPassNo: %i\n", prefix, s->fsck_passno); if (s->status_text) fprintf(f, "%sStatus Text: %s\n", prefix, s->status_text); free(p2); } static int service_load_pid_file(Service *s) { char *k; int r; pid_t pid; assert(s); if (s->main_pid_known) return 0; assert(s->main_pid <= 0); if (!s->pid_file) return -ENOENT; if ((r = read_one_line_file(s->pid_file, &k)) < 0) return r; r = parse_pid(k, &pid); free(k); if (r < 0) return r; if (kill(pid, 0) < 0 && errno != EPERM) { log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.", (unsigned long) pid, s->pid_file); return -ESRCH; } if ((r = service_set_main_pid(s, pid)) < 0) return r; if ((r = unit_watch_pid(UNIT(s), pid)) < 0) /* FIXME: we need to do something here */ return r; return 0; } static int service_search_main_pid(Service *s) { pid_t pid; int r; assert(s); if (s->main_pid_known) return 0; assert(s->main_pid <= 0); if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0) return -ENOENT; if ((r = service_set_main_pid(s, pid)) < 0) return r; if ((r = unit_watch_pid(UNIT(s), pid)) < 0) /* FIXME: we need to do something here */ return r; return 0; } static int service_get_sockets(Service *s, Set **_set) { Set *set; Iterator i; char *t; int r; assert(s); assert(_set); if (s->socket_fd >= 0) return 0; if (!set_isempty(s->configured_sockets)) return 0; /* Collects all Socket objects that belong to this * service. Note that a service might have multiple sockets * via multiple names. */ if (!(set = set_new(NULL, NULL))) return -ENOMEM; SET_FOREACH(t, s->meta.names, i) { char *k; Unit *p; /* Look for all socket objects that go by any of our * units and collect their fds */ if (!(k = unit_name_change_suffix(t, ".socket"))) { r = -ENOMEM; goto fail; } p = manager_get_unit(s->meta.manager, k); free(k); if (!p) continue; if ((r = set_put(set, p)) < 0) goto fail; } *_set = set; return 0; fail: set_free(set); return r; } static int service_notify_sockets_dead(Service *s) { Iterator i; Set *set, *free_set = NULL; Socket *sock; int r; assert(s); /* Notifies all our sockets when we die */ if (s->socket_fd >= 0) return 0; if (!set_isempty(s->configured_sockets)) set = s->configured_sockets; else { if ((r = service_get_sockets(s, &free_set)) < 0) return r; set = free_set; } SET_FOREACH(sock, set, i) socket_notify_service_dead(sock); set_free(free_set); return 0; } static void service_set_state(Service *s, ServiceState state) { ServiceState old_state; assert(s); old_state = s->state; s->state = state; if (state != SERVICE_START_PRE && state != SERVICE_START && state != SERVICE_START_POST && state != SERVICE_RELOAD && state != SERVICE_STOP && state != SERVICE_STOP_SIGTERM && state != SERVICE_STOP_SIGKILL && state != SERVICE_STOP_POST && state != SERVICE_FINAL_SIGTERM && state != SERVICE_FINAL_SIGKILL && state != SERVICE_AUTO_RESTART) unit_unwatch_timer(UNIT(s), &s->timer_watch); if (state != SERVICE_START && state != SERVICE_START_POST && state != SERVICE_RUNNING && state != SERVICE_RELOAD && state != SERVICE_STOP && state != SERVICE_STOP_SIGTERM && state != SERVICE_STOP_SIGKILL) service_unwatch_main_pid(s); if (state != SERVICE_START_PRE && state != SERVICE_START && state != SERVICE_START_POST && state != SERVICE_RELOAD && state != SERVICE_STOP && state != SERVICE_STOP_SIGTERM && state != SERVICE_STOP_SIGKILL && state != SERVICE_STOP_POST && state != SERVICE_FINAL_SIGTERM && state != SERVICE_FINAL_SIGKILL) { service_unwatch_control_pid(s); s->control_command = NULL; s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; } if (state == SERVICE_DEAD || state == SERVICE_STOP || state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL || state == SERVICE_STOP_POST || state == SERVICE_FINAL_SIGTERM || state == SERVICE_FINAL_SIGKILL || state == SERVICE_FAILED || state == SERVICE_AUTO_RESTART) service_notify_sockets_dead(s); if (state != SERVICE_START_PRE && state != SERVICE_START && state != SERVICE_START_POST && state != SERVICE_RUNNING && state != SERVICE_RELOAD && state != SERVICE_STOP && state != SERVICE_STOP_SIGTERM && state != SERVICE_STOP_SIGKILL && state != SERVICE_STOP_POST && state != SERVICE_FINAL_SIGTERM && state != SERVICE_FINAL_SIGKILL && !(state == SERVICE_DEAD && s->meta.job)) { service_close_socket_fd(s); service_connection_unref(s); } /* For the inactive states unit_notify() will trim the cgroup, * but for exit we have to do that ourselves... */ if (state == SERVICE_EXITED) cgroup_bonding_trim_list(s->meta.cgroup_bondings, true); if (old_state != state) log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state)); unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); } static int service_coldplug(Unit *u) { Service *s = SERVICE(u); int r; assert(s); assert(s->state == SERVICE_DEAD); if (s->deserialized_state != s->state) { if (s->deserialized_state == SERVICE_START_PRE || s->deserialized_state == SERVICE_START || s->deserialized_state == SERVICE_START_POST || s->deserialized_state == SERVICE_RELOAD || s->deserialized_state == SERVICE_STOP || s->deserialized_state == SERVICE_STOP_SIGTERM || s->deserialized_state == SERVICE_STOP_SIGKILL || s->deserialized_state == SERVICE_STOP_POST || s->deserialized_state == SERVICE_FINAL_SIGTERM || s->deserialized_state == SERVICE_FINAL_SIGKILL || s->deserialized_state == SERVICE_AUTO_RESTART) { if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) { usec_t k; k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec; if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0) return r; } } if ((s->deserialized_state == SERVICE_START && (s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_ONESHOT || s->type == SERVICE_NOTIFY)) || s->deserialized_state == SERVICE_START_POST || s->deserialized_state == SERVICE_RUNNING || s->deserialized_state == SERVICE_RELOAD || s->deserialized_state == SERVICE_STOP || s->deserialized_state == SERVICE_STOP_SIGTERM || s->deserialized_state == SERVICE_STOP_SIGKILL) if (s->main_pid > 0) if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0) return r; if (s->deserialized_state == SERVICE_START_PRE || s->deserialized_state == SERVICE_START || s->deserialized_state == SERVICE_START_POST || s->deserialized_state == SERVICE_RELOAD || s->deserialized_state == SERVICE_STOP || s->deserialized_state == SERVICE_STOP_SIGTERM || s->deserialized_state == SERVICE_STOP_SIGKILL || s->deserialized_state == SERVICE_STOP_POST || s->deserialized_state == SERVICE_FINAL_SIGTERM || s->deserialized_state == SERVICE_FINAL_SIGKILL) if (s->control_pid > 0) if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0) return r; service_set_state(s, s->deserialized_state); } return 0; } static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { Iterator i; int r; int *rfds = NULL; unsigned rn_fds = 0; Set *set, *free_set = NULL; Socket *sock; assert(s); assert(fds); assert(n_fds); if (s->socket_fd >= 0) return 0; if (!set_isempty(s->configured_sockets)) set = s->configured_sockets; else { if ((r = service_get_sockets(s, &free_set)) < 0) return r; set = free_set; } SET_FOREACH(sock, set, i) { int *cfds; unsigned cn_fds; if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0) goto fail; if (!cfds) continue; if (!rfds) { rfds = cfds; rn_fds = cn_fds; } else { int *t; if (!(t = new(int, rn_fds+cn_fds))) { free(cfds); r = -ENOMEM; goto fail; } memcpy(t, rfds, rn_fds); memcpy(t+rn_fds, cfds, cn_fds); free(rfds); free(cfds); rfds = t; rn_fds = rn_fds+cn_fds; } } *fds = rfds; *n_fds = rn_fds; set_free(free_set); return 0; fail: set_free(set); free(rfds); return r; } static int service_spawn( Service *s, ExecCommand *c, bool timeout, bool pass_fds, bool apply_permissions, bool apply_chroot, bool apply_tty_stdin, bool set_notify_socket, pid_t *_pid) { pid_t pid; int r; int *fds = NULL, *fdsbuf = NULL; unsigned n_fds = 0, n_env = 0; char **argv = NULL, **final_env = NULL, **our_env = NULL; assert(s); assert(c); assert(_pid); if (pass_fds || s->exec_context.std_input == EXEC_INPUT_SOCKET || s->exec_context.std_output == EXEC_OUTPUT_SOCKET || s->exec_context.std_error == EXEC_OUTPUT_SOCKET) { if (s->socket_fd >= 0) { fds = &s->socket_fd; n_fds = 1; } else { if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0) goto fail; fds = fdsbuf; } } if (timeout && s->timeout_usec) { if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) goto fail; } else unit_unwatch_timer(UNIT(s), &s->timer_watch); if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) { r = -ENOMEM; goto fail; } if (!(our_env = new0(char*, 4))) { r = -ENOMEM; goto fail; } if (set_notify_socket) if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) { r = -ENOMEM; goto fail; } if (s->main_pid > 0) if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) { r = -ENOMEM; goto fail; } if (!(final_env = strv_env_merge(2, s->meta.manager->environment, our_env, NULL))) { r = -ENOMEM; goto fail; } r = exec_spawn(c, argv, &s->exec_context, fds, n_fds, final_env, apply_permissions, apply_chroot, apply_tty_stdin, s->meta.manager->confirm_spawn, s->meta.cgroup_bondings, &pid); if (r < 0) goto fail; if ((r = unit_watch_pid(UNIT(s), pid)) < 0) /* FIXME: we need to do something here */ goto fail; free(fdsbuf); strv_free(argv); strv_free(our_env); strv_free(final_env); *_pid = pid; return 0; fail: free(fdsbuf); strv_free(argv); strv_free(our_env); strv_free(final_env); if (timeout) unit_unwatch_timer(UNIT(s), &s->timer_watch); return r; } static int main_pid_good(Service *s) { assert(s); /* Returns 0 if the pid is dead, 1 if it is good, -1 if we * don't know */ /* If we know the pid file, then lets just check if it is * still valid */ if (s->main_pid_known) return s->main_pid > 0; /* We don't know the pid */ return -EAGAIN; } 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 ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0) return r; return !r; } static void service_enter_dead(Service *s, bool success, bool allow_restart) { int r; assert(s); if (!success) s->failure = true; if (allow_restart && !s->forbid_restart && (s->restart == SERVICE_RESTART_ALWAYS || (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) || (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) || (s->restart == SERVICE_RESTART_ON_ABORT && s->failure && (s->main_exec_status.code == CLD_KILLED || s->main_exec_status.code == CLD_DUMPED)))) { if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) goto fail; service_set_state(s, SERVICE_AUTO_RESTART); } else service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD); s->forbid_restart = false; return; fail: log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r)); service_enter_dead(s, false, false); } static void service_enter_signal(Service *s, ServiceState state, bool success); static void service_enter_stop_post(Service *s, bool success) { int r; assert(s); if (!success) s->failure = true; service_unwatch_control_pid(s); s->control_command_id = SERVICE_EXEC_STOP_POST; if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) { if ((r = service_spawn(s, s->control_command, true, false, !s->permissions_start_only, !s->root_directory_start_only, true, false, &s->control_pid)) < 0) goto fail; service_set_state(s, SERVICE_STOP_POST); } else service_enter_signal(s, SERVICE_FINAL_SIGTERM, true); return; fail: log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r)); service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); } static void service_enter_signal(Service *s, ServiceState state, bool success) { int r; Set *pid_set = NULL; bool wait_for_exit = false; assert(s); if (!success) s->failure = true; if (s->exec_context.kill_mode != KILL_NONE) { int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL; if (s->main_pid > 0) { if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, sig) < 0 && errno != ESRCH) log_warning("Failed to kill main process %li: %m", (long) s->main_pid); else wait_for_exit = true; } if (s->control_pid > 0) { if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, sig) < 0 && errno != ESRCH) log_warning("Failed to kill control process %li: %m", (long) s->control_pid); else wait_for_exit = true; } if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) { if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) { r = -ENOMEM; goto fail; } /* Exclude the main/control pids from being killed via the cgroup */ if (s->main_pid > 0) if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) goto fail; if (s->control_pid > 0) if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) goto fail; if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) { if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) log_warning("Failed to kill control group: %s", strerror(-r)); } else if (r > 0) wait_for_exit = true; set_free(pid_set); } } if (wait_for_exit) { if (s->timeout_usec > 0) if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) goto fail; service_set_state(s, state); } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) service_enter_stop_post(s, true); else service_enter_dead(s, true, true); return; fail: log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r)); if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) service_enter_stop_post(s, false); else service_enter_dead(s, false, true); if (pid_set) set_free(pid_set); } static void service_enter_stop(Service *s, bool success) { int r; assert(s); if (!success) s->failure = true; service_unwatch_control_pid(s); s->control_command_id = SERVICE_EXEC_STOP; if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) { if ((r = service_spawn(s, s->control_command, true, false, !s->permissions_start_only, !s->root_directory_start_only, false, false, &s->control_pid)) < 0) goto fail; service_set_state(s, SERVICE_STOP); } else service_enter_signal(s, SERVICE_STOP_SIGTERM, true); return; fail: log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r)); service_enter_signal(s, SERVICE_STOP_SIGTERM, false); } static void service_enter_running(Service *s, bool success) { int main_pid_ok, cgroup_ok; assert(s); if (!success) s->failure = true; main_pid_ok = main_pid_good(s); cgroup_ok = cgroup_good(s); if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) && (s->bus_name_good || s->type != SERVICE_DBUS)) service_set_state(s, SERVICE_RUNNING); else if (s->remain_after_exit) service_set_state(s, SERVICE_EXITED); else service_enter_stop(s, true); } static void service_enter_start_post(Service *s) { int r; assert(s); service_unwatch_control_pid(s); s->control_command_id = SERVICE_EXEC_START_POST; if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) { if ((r = service_spawn(s, s->control_command, true, false, !s->permissions_start_only, !s->root_directory_start_only, false, false, &s->control_pid)) < 0) goto fail; service_set_state(s, SERVICE_START_POST); } else service_enter_running(s, true); return; fail: log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r)); service_enter_stop(s, false); } static void service_enter_start(Service *s) { pid_t pid; int r; assert(s); assert(s->exec_command[SERVICE_EXEC_START]); assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT); if (s->type == SERVICE_FORKING) service_unwatch_control_pid(s); else service_unwatch_main_pid(s); s->control_command_id = SERVICE_EXEC_START; s->control_command = s->exec_command[SERVICE_EXEC_START]; if ((r = service_spawn(s, s->control_command, s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY, true, true, true, true, s->notify_access != NOTIFY_NONE, &pid)) < 0) goto fail; if (s->type == SERVICE_SIMPLE) { /* For simple services we immediately start * the START_POST binaries. */ service_set_main_pid(s, pid); service_enter_start_post(s); } else if (s->type == SERVICE_FORKING) { /* For forking services we wait until the start * process exited. */ s->control_pid = pid; service_set_state(s, SERVICE_START); } else if (s->type == SERVICE_ONESHOT || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY) { /* For oneshot services we wait until the start * process exited, too, but it is our main process. */ /* For D-Bus services we know the main pid right away, * but wait for the bus name to appear on the * bus. Notify services are similar. */ service_set_main_pid(s, pid); service_set_state(s, SERVICE_START); } else assert_not_reached("Unknown service type"); return; fail: log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r)); service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); } static void service_enter_start_pre(Service *s) { int r; assert(s); service_unwatch_control_pid(s); s->control_command_id = SERVICE_EXEC_START_PRE; if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) { if ((r = service_spawn(s, s->control_command, true, false, !s->permissions_start_only, !s->root_directory_start_only, true, false, &s->control_pid)) < 0) goto fail; service_set_state(s, SERVICE_START_PRE); } else service_enter_start(s); return; fail: log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r)); service_enter_dead(s, false, true); } static void service_enter_restart(Service *s) { int r; DBusError error; assert(s); dbus_error_init(&error); if (s->meta.job) { log_info("Job pending for unit, delaying automatic restart."); if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) goto fail; } service_enter_dead(s, true, false); if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0) goto fail; log_debug("%s scheduled restart job.", s->meta.id); return; fail: log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r)); service_enter_dead(s, false, false); dbus_error_free(&error); } static void service_enter_reload(Service *s) { int r; assert(s); service_unwatch_control_pid(s); s->control_command_id = SERVICE_EXEC_RELOAD; if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) { if ((r = service_spawn(s, s->control_command, true, false, !s->permissions_start_only, !s->root_directory_start_only, false, false, &s->control_pid)) < 0) goto fail; service_set_state(s, SERVICE_RELOAD); } else service_enter_running(s, true); return; fail: log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r)); service_enter_stop(s, false); } static void service_run_next_control(Service *s, bool success) { int r; assert(s); assert(s->control_command); assert(s->control_command->command_next); if (!success) s->failure = true; assert(s->control_command_id != SERVICE_EXEC_START); s->control_command = s->control_command->command_next; service_unwatch_control_pid(s); if ((r = service_spawn(s, s->control_command, true, false, !s->permissions_start_only, !s->root_directory_start_only, s->control_command_id == SERVICE_EXEC_START_PRE || s->control_command_id == SERVICE_EXEC_STOP_POST, false, &s->control_pid)) < 0) goto fail; return; fail: log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r)); if (s->state == SERVICE_START_PRE) service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); else if (s->state == SERVICE_STOP) service_enter_signal(s, SERVICE_STOP_SIGTERM, false); else if (s->state == SERVICE_STOP_POST) service_enter_dead(s, false, true); else service_enter_stop(s, false); } static void service_run_next_main(Service *s, bool success) { pid_t pid; int r; assert(s); assert(s->control_command); assert(s->control_command->command_next); if (!success) s->failure = true; assert(s->control_command_id == SERVICE_EXEC_START); assert(s->type == SERVICE_ONESHOT); s->control_command = s->control_command->command_next; service_unwatch_main_pid(s); if ((r = service_spawn(s, s->control_command, false, true, true, true, true, s->notify_access != NOTIFY_NONE, &pid)) < 0) goto fail; service_set_main_pid(s, pid); return; fail: log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r)); service_enter_stop(s, false); } static int service_start(Unit *u) { Service *s = SERVICE(u); assert(s); /* We cannot fulfill this request right now, try again later * please! */ if (s->state == SERVICE_STOP || s->state == SERVICE_STOP_SIGTERM || s->state == SERVICE_STOP_SIGKILL || s->state == SERVICE_STOP_POST || s->state == SERVICE_FINAL_SIGTERM || s->state == SERVICE_FINAL_SIGKILL) return -EAGAIN; /* Already on it! */ if (s->state == SERVICE_START_PRE || s->state == SERVICE_START || s->state == SERVICE_START_POST) return 0; assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART); /* Make sure we don't enter a busy loop of some kind. */ if (!ratelimit_test(&s->ratelimit)) { log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id); return -ECANCELED; } s->failure = false; s->main_pid_known = false; s->forbid_restart = false; service_enter_start_pre(s); return 0; } static int service_stop(Unit *u) { Service *s = SERVICE(u); assert(s); /* This is a user request, so don't do restarts on this * shutdown. */ s->forbid_restart = true; /* Already on it */ if (s->state == SERVICE_STOP || s->state == SERVICE_STOP_SIGTERM || s->state == SERVICE_STOP_SIGKILL || s->state == SERVICE_STOP_POST || s->state == SERVICE_FINAL_SIGTERM || s->state == SERVICE_FINAL_SIGKILL) return 0; /* Don't allow a restart */ if (s->state == SERVICE_AUTO_RESTART) { service_set_state(s, SERVICE_DEAD); return 0; } /* If there's already something running we go directly into * kill mode. */ if (s->state == SERVICE_START_PRE || s->state == SERVICE_START || s->state == SERVICE_START_POST || s->state == SERVICE_RELOAD) { service_enter_signal(s, SERVICE_STOP_SIGTERM, true); return 0; } assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED); service_enter_stop(s, true); return 0; } static int service_reload(Unit *u) { Service *s = SERVICE(u); assert(s); assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED); service_enter_reload(s); return 0; } static bool service_can_reload(Unit *u) { Service *s = SERVICE(u); assert(s); return !!s->exec_command[SERVICE_EXEC_RELOAD]; } static int service_serialize(Unit *u, FILE *f, FDSet *fds) { Service *s = SERVICE(u); assert(u); assert(f); assert(fds); unit_serialize_item(u, f, "state", service_state_to_string(s->state)); unit_serialize_item(u, f, "failure", yes_no(s->failure)); if (s->control_pid > 0) unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); if (s->main_pid_known && s->main_pid > 0) unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid); unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known)); if (s->status_text) unit_serialize_item(u, f, "status-text", s->status_text); /* There's a minor uncleanliness here: if there are multiple * commands attached here, we will start from the first one * again */ if (s->control_command_id >= 0) unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id)); if (s->socket_fd >= 0) { int copy; if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0) return copy; unit_serialize_item_format(u, f, "socket-fd", "%i", copy); } if (s->main_exec_status.pid > 0) { unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid); dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp); dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp); if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) { unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code); unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status); } } return 0; } static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { Service *s = SERVICE(u); assert(u); assert(key); assert(value); assert(fds); if (streq(key, "state")) { ServiceState state; if ((state = service_state_from_string(value)) < 0) log_debug("Failed to parse state value %s", value); else s->deserialized_state = state; } else if (streq(key, "failure")) { int b; if ((b = parse_boolean(value)) < 0) log_debug("Failed to parse failure value %s", value); else s->failure = b || s->failure; } else if (streq(key, "control-pid")) { pid_t pid; if (parse_pid(value, &pid) < 0) log_debug("Failed to parse control-pid value %s", value); else s->control_pid = pid; } else if (streq(key, "main-pid")) { pid_t pid; if (parse_pid(value, &pid) < 0) log_debug("Failed to parse main-pid value %s", value); else service_set_main_pid(s, (pid_t) pid); } else if (streq(key, "main-pid-known")) { int b; if ((b = parse_boolean(value)) < 0) log_debug("Failed to parse main-pid-known value %s", value); else s->main_pid_known = b; } else if (streq(key, "status-text")) { char *t; if ((t = strdup(value))) { free(s->status_text); s->status_text = t; } } else if (streq(key, "control-command")) { ServiceExecCommand id; if ((id = service_exec_command_from_string(value)) < 0) log_debug("Failed to parse exec-command value %s", value); else { s->control_command_id = id; s->control_command = s->exec_command[id]; } } else if (streq(key, "socket-fd")) { int fd; if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) log_debug("Failed to parse socket-fd value %s", value); else { if (s->socket_fd >= 0) close_nointr_nofail(s->socket_fd); s->socket_fd = fdset_remove(fds, fd); } } else if (streq(key, "main-exec-status-pid")) { pid_t pid; if (parse_pid(value, &pid) < 0) log_debug("Failed to parse main-exec-status-pid value %s", value); else s->main_exec_status.pid = pid; } else if (streq(key, "main-exec-status-code")) { int i; if (safe_atoi(value, &i) < 0) log_debug("Failed to parse main-exec-status-code value %s", value); else s->main_exec_status.code = i; } else if (streq(key, "main-exec-status-status")) { int i; if (safe_atoi(value, &i) < 0) log_debug("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 log_debug("Unknown serialization key '%s'", key); return 0; } static UnitActiveState service_active_state(Unit *u) { assert(u); return state_translation_table[SERVICE(u)->state]; } static const char *service_sub_state_to_string(Unit *u) { assert(u); return service_state_to_string(SERVICE(u)->state); } #ifdef HAVE_SYSV_COMPAT static bool service_check_gc(Unit *u) { Service *s = SERVICE(u); assert(s); return !!s->sysv_path; } #endif static bool service_check_snapshot(Unit *u) { Service *s = SERVICE(u); assert(s); return !s->got_socket_fd; } static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { Service *s = SERVICE(u); bool success; assert(s); assert(pid >= 0); if (!s->meta.fragment_path) success = is_clean_exit_lsb(code, status); else success = is_clean_exit(code, status); if (s->main_pid == pid) { s->main_pid = 0; exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id); if (s->type != SERVICE_FORKING && s->control_command) { s->control_command->exec_status = s->main_exec_status; if (s->control_command->ignore) success = true; } log_full(success ? LOG_DEBUG : LOG_NOTICE, "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status); s->failure = s->failure || !success; if (s->control_command && s->control_command->command_next && success) { /* There is another command to * * execute, so let's do that. */ log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state)); service_run_next_main(s, success); } else { /* The service exited, so the service is officially * gone. */ s->control_command = NULL; s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; 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 (success) service_enter_start_post(s); else service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); break; } else { assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY); /* Fall through */ } case SERVICE_RUNNING: service_enter_running(s, success); break; case SERVICE_STOP_SIGTERM: case SERVICE_STOP_SIGKILL: if (!control_pid_good(s)) service_enter_stop_post(s, success); /* If there is still a control process, wait for that first */ break; default: assert_not_reached("Uh, main process died at wrong time."); } } } else if (s->control_pid == pid) { s->control_pid = 0; if (s->control_command) { exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id); if (s->control_command->ignore) success = true; } log_full(success ? LOG_DEBUG : LOG_NOTICE, "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status); s->failure = s->failure || !success; if (s->control_command && s->control_command->command_next && success) { /* There is another command to * * execute, so let's do that. */ log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state)); service_run_next_control(s, success); } else { /* No further commands for this step, so let's * figure out what to do next */ s->control_command = NULL; s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state)); switch (s->state) { case SERVICE_START_PRE: if (success) service_enter_start(s); else service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); break; case SERVICE_START: assert(s->type == SERVICE_FORKING); /* Let's try to load the pid * file here if we can. We * ignore the return value, * since the PID file might * actually be created by a * START_POST script */ if (success) { service_load_pid_file(s); service_search_main_pid(s); service_enter_start_post(s); } else service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); break; case SERVICE_START_POST: if (success && s->pid_file && !s->main_pid_known) { int r; /* Hmm, let's see if we can * load the pid now after the * start-post scripts got * executed. */ if ((r = service_load_pid_file(s)) < 0) log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r)); } /* Fall through */ case SERVICE_RELOAD: if (success) service_enter_running(s, true); else service_enter_stop(s, false); break; case SERVICE_STOP: service_enter_signal(s, SERVICE_STOP_SIGTERM, success); break; case SERVICE_STOP_SIGTERM: case SERVICE_STOP_SIGKILL: if (main_pid_good(s) <= 0) service_enter_stop_post(s, success); /* If there is still a service * process around, wait until * that one quit, too */ break; case SERVICE_STOP_POST: case SERVICE_FINAL_SIGTERM: case SERVICE_FINAL_SIGKILL: service_enter_dead(s, success, true); break; default: assert_not_reached("Uh, control process died at wrong time."); } } } /* Notify clients about changed exit status */ unit_add_to_dbus_queue(u); } static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { Service *s = SERVICE(u); assert(s); assert(elapsed == 1); assert(w == &s->timer_watch); switch (s->state) { case SERVICE_START_PRE: case SERVICE_START: log_warning("%s operation timed out. Terminating.", u->meta.id); service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); break; case SERVICE_START_POST: case SERVICE_RELOAD: log_warning("%s operation timed out. Stopping.", u->meta.id); service_enter_stop(s, false); break; case SERVICE_STOP: log_warning("%s stopping timed out. Terminating.", u->meta.id); service_enter_signal(s, SERVICE_STOP_SIGTERM, false); break; case SERVICE_STOP_SIGTERM: log_warning("%s stopping timed out. Killing.", u->meta.id); service_enter_signal(s, SERVICE_STOP_SIGKILL, false); break; case SERVICE_STOP_SIGKILL: /* Uh, wie sent a SIGKILL and it is still not gone? * Must be something we cannot kill, so let's just be * weirded out and continue */ log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id); service_enter_stop_post(s, false); break; case SERVICE_STOP_POST: log_warning("%s stopping timed out (2). Terminating.", u->meta.id); service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); break; case SERVICE_FINAL_SIGTERM: log_warning("%s stopping timed out (2). Killing.", u->meta.id); service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); break; case SERVICE_FINAL_SIGKILL: log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id); service_enter_dead(s, false, true); break; case SERVICE_AUTO_RESTART: log_info("%s holdoff time over, scheduling restart.", u->meta.id); service_enter_restart(s); break; default: assert_not_reached("Timeout at wrong time."); } } static void service_cgroup_notify_event(Unit *u) { Service *s = SERVICE(u); assert(u); log_debug("%s: cgroup is empty", u->meta.id); switch (s->state) { /* Waiting for SIGCHLD is usually more interesting, * because it includes return codes/signals. Which is * why we ignore the cgroup events for most cases, * except when we don't know pid which to expect the * SIGCHLD for. */ case SERVICE_RUNNING: service_enter_running(s, true); break; case SERVICE_STOP_SIGTERM: case SERVICE_STOP_SIGKILL: if (main_pid_good(s) <= 0 && !control_pid_good(s)) service_enter_stop_post(s, true); break; case SERVICE_FINAL_SIGTERM: case SERVICE_FINAL_SIGKILL: if (main_pid_good(s) <= 0 && !control_pid_good(s)) service_enter_dead(s, true, true); break; default: ; } } static void service_notify_message(Unit *u, pid_t pid, char **tags) { Service *s = SERVICE(u); const char *e; assert(u); if (s->notify_access == NOTIFY_NONE) { log_warning("%s: Got notification message from PID %lu, but reception is disabled.", u->meta.id, (unsigned long) pid); return; } if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) { log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu", u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid); return; } log_debug("%s: Got message", u->meta.id); /* Interpret MAINPID= */ if ((e = strv_find_prefix(tags, "MAINPID=")) && (s->state == SERVICE_START || s->state == SERVICE_START_POST || s->state == SERVICE_RUNNING || s->state == SERVICE_RELOAD)) { if (parse_pid(e + 8, &pid) < 0) log_warning("Failed to parse notification message %s", e); else { log_debug("%s: got %s", u->meta.id, e); service_set_main_pid(s, pid); } } /* Interpret READY= */ if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START && strv_find(tags, "READY=1")) { log_debug("%s: got READY=1", u->meta.id); service_enter_start_post(s); } /* Interpret STATUS= */ if ((e = strv_find_prefix(tags, "STATUS="))) { char *t; if (e[7]) { if (!(t = strdup(e+7))) { log_error("Failed to allocate string."); return; } log_debug("%s: got %s", u->meta.id, e); free(s->status_text); s->status_text = t; } else { free(s->status_text); s->status_text = NULL; } } /* Notify clients about changed status or main pid */ unit_add_to_dbus_queue(u); } #ifdef HAVE_SYSV_COMPAT static int service_enumerate(Manager *m) { char **p; unsigned i; DIR *d = NULL; char *path = NULL, *fpath = NULL, *name = NULL; Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL; Unit *service; Iterator j; int r; #ifdef TARGET_ARCH Unit *previous = NULL; char *arch_daemons = NULL; char *arch_daemons_stripped = NULL; char **arch_daemons_split = NULL; #endif assert(m); #ifdef TARGET_ARCH if ((r = parse_env_file("/etc/rc.conf", NEWLINE, "DAEMONS", &arch_daemons, NULL)) < 0) { if (r != -ENOENT) log_warning("Failed to read /etc/rc.conf: %s", strerror(-r)); } else if (arch_daemons) { if (!(arch_daemons_stripped = strchr(arch_daemons, '('))) arch_daemons_stripped = arch_daemons; else arch_daemons_stripped++; /* strip start paren */ arch_daemons_stripped[strcspn(arch_daemons_stripped, ")")] = 0; /* strip end paren */ if (!(arch_daemons_split = strv_split_quoted(arch_daemons_stripped))) { r = -ENOMEM; goto finish; } STRV_FOREACH(p, arch_daemons_split) { free(name); name = NULL; if (**p == '!') /* daemons prefixed with ! are disabled, so ignore them */ continue; if (!(name = sysv_translate_name(*p))) { r = -ENOMEM; goto finish; } if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) { log_warning("Failed to prepare unit %s: %s", name, strerror(-r)); continue; } if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, "multi-user.target", NULL, true)) < 0) goto finish; if (previous) if ((r = unit_add_dependency(service, UNIT_AFTER, previous, true)) < 0) goto finish; if (**p != '@') /* daemons prefixed with @ can be started in the background */ previous = service; } } #endif zero(runlevel_services); STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path) for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) { struct dirent *de; free(path); path = NULL; if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) { r = -ENOMEM; goto finish; } if (d) closedir(d); if (!(d = opendir(path))) { if (errno != ENOENT) log_warning("opendir() failed on %s: %s", path, strerror(errno)); continue; } while ((de = readdir(d))) { int a, b; if (ignore_file(de->d_name)) continue; if (de->d_name[0] != 'S' && de->d_name[0] != 'K') continue; if (strlen(de->d_name) < 4) continue; a = undecchar(de->d_name[1]); b = undecchar(de->d_name[2]); if (a < 0 || b < 0) continue; free(fpath); fpath = NULL; if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) { r = -ENOMEM; goto finish; } if (access(fpath, X_OK) < 0) { if (errno != ENOENT) log_warning("access() failed on %s: %s", fpath, strerror(errno)); continue; } free(name); if (!(name = sysv_translate_name(de->d_name + 3))) { r = -ENOMEM; goto finish; } if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) { log_warning("Failed to prepare unit %s: %s", name, strerror(-r)); continue; } if (de->d_name[0] == 'S') { if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) { SERVICE(service)->sysv_start_priority = MAX(a*10 + b, SERVICE(service)->sysv_start_priority); SERVICE(service)->sysv_enabled = true; } if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0) goto finish; if ((r = set_put(runlevel_services[i], service)) < 0) goto finish; } else if (de->d_name[0] == 'K' && (rcnd_table[i].type == RUNLEVEL_DOWN || rcnd_table[i].type == RUNLEVEL_SYSINIT)) { if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0) goto finish; if ((r = set_put(shutdown_services, service)) < 0) goto finish; } } } /* Now we loaded all stubs and are aware of the lowest start-up priority for all services, not let's actually load the services, this will also tell us which services are actually native now */ manager_dispatch_load_queue(m); /* If this is a native service, rely on native ways to pull in * a service, don't pull it in via sysv rcN.d links. */ for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) SET_FOREACH(service, runlevel_services[i], j) { service = unit_follow_merge(service); if (service->meta.fragment_path) continue; if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0) goto finish; } /* We honour K links only for halt/reboot. For the normal * runlevels we assume the stop jobs will be implicitly added * by the core logic. Also, we don't really distuingish here * between the runlevels 0 and 6 and just add them to the * special shutdown target. On SUSE the boot.d/ runlevel is * also used for shutdown, so we add links for that too to the * shutdown target.*/ SET_FOREACH(service, shutdown_services, j) { service = unit_follow_merge(service); if (service->meta.fragment_path) continue; if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0) goto finish; } r = 0; finish: free(path); free(fpath); free(name); #ifdef TARGET_ARCH free(arch_daemons); free(arch_daemons_split); #endif for (i = 0; i < ELEMENTSOF(rcnd_table); i++) set_free(runlevel_services[i]); set_free(shutdown_services); if (d) closedir(d); return r; } #endif static void service_bus_name_owner_change( Unit *u, const char *name, const char *old_owner, const char *new_owner) { Service *s = SERVICE(u); assert(s); assert(name); assert(streq(s->bus_name, name)); assert(old_owner || new_owner); if (old_owner && new_owner) log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner); else if (old_owner) log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner); else log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner); s->bus_name_good = !!new_owner; if (s->type == SERVICE_DBUS) { /* service_enter_running() will figure out what to * do */ if (s->state == SERVICE_RUNNING) service_enter_running(s, true); 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)) { /* Try to acquire PID from bus service */ log_debug("Trying to acquire PID from D-Bus name..."); bus_query_pid(u->meta.manager, name); } } static void service_bus_query_pid_done( Unit *u, const char *name, pid_t pid) { Service *s = SERVICE(u); assert(s); assert(name); log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid); if (s->main_pid <= 0 && (s->state == SERVICE_START || s->state == SERVICE_START_POST || s->state == SERVICE_RUNNING || s->state == SERVICE_RELOAD)) service_set_main_pid(s, pid); } int service_set_socket_fd(Service *s, int fd, Socket *sock) { assert(s); assert(fd >= 0); /* This is called by the socket code when instantiating a new * service for a stream socket and the socket needs to be * configured. */ if (s->meta.load_state != UNIT_LOADED) return -EINVAL; if (s->socket_fd >= 0) return -EBUSY; if (s->state != SERVICE_DEAD) return -EAGAIN; s->socket_fd = fd; s->got_socket_fd = true; s->accept_socket = 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->failure = false; } static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) { Service *s = SERVICE(u); int r = 0; Set *pid_set = NULL; assert(s); if (s->main_pid <= 0 && who == KILL_MAIN) { dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); return -EINVAL; } if (s->control_pid <= 0 && who == KILL_CONTROL) { dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); return -ENOENT; } if (s->control_pid > 0) if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0) r = -errno; if (s->main_pid > 0) if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0) r = -errno; if (mode == KILL_CONTROL_GROUP) { int q; if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) return -ENOMEM; /* Exclude the control/main pid from being killed via the cgroup */ if (s->control_pid > 0) if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) { r = q; goto finish; } if (s->main_pid > 0) if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) { r = q; goto finish; } if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0) if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) r = q; } finish: if (pid_set) set_free(pid_set); return r; } static const char* const service_state_table[_SERVICE_STATE_MAX] = { [SERVICE_DEAD] = "dead", [SERVICE_START_PRE] = "start-pre", [SERVICE_START] = "start", [SERVICE_START_POST] = "start-post", [SERVICE_RUNNING] = "running", [SERVICE_EXITED] = "exited", [SERVICE_RELOAD] = "reload", [SERVICE_STOP] = "stop", [SERVICE_STOP_SIGTERM] = "stop-sigterm", [SERVICE_STOP_SIGKILL] = "stop-sigkill", [SERVICE_STOP_POST] = "stop-post", [SERVICE_FINAL_SIGTERM] = "final-sigterm", [SERVICE_FINAL_SIGKILL] = "final-sigkill", [SERVICE_FAILED] = "failed", [SERVICE_AUTO_RESTART] = "auto-restart", }; DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState); static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { [SERVICE_RESTART_NO] = "no", [SERVICE_RESTART_ON_SUCCESS] = "on-success", [SERVICE_RESTART_ON_FAILURE] = "on-failure", [SERVICE_RESTART_ON_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" }; 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); const UnitVTable service_vtable = { .suffix = ".service", .show_status = true, .init = service_init, .done = service_done, .load = service_load, .coldplug = service_coldplug, .dump = service_dump, .start = service_start, .stop = service_stop, .reload = service_reload, .can_reload = service_can_reload, .kill = service_kill, .serialize = service_serialize, .deserialize_item = service_deserialize_item, .active_state = service_active_state, .sub_state_to_string = service_sub_state_to_string, #ifdef HAVE_SYSV_COMPAT .check_gc = service_check_gc, #endif .check_snapshot = service_check_snapshot, .sigchld_event = service_sigchld_event, .timer_event = service_timer_event, .reset_failed = service_reset_failed, .cgroup_notify_empty = service_cgroup_notify_event, .notify_message = service_notify_message, .bus_name_owner_change = service_bus_name_owner_change, .bus_query_pid_done = service_bus_query_pid_done, .bus_interface = "org.freedesktop.systemd1.Service", .bus_message_handler = bus_service_message_handler, .bus_invalidating_properties = bus_service_invalidating_properties, #ifdef HAVE_SYSV_COMPAT .enumerate = service_enumerate #endif };