/*-*- Mode: C; c-basic-offset: 8 -*-*/ /*** 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 . ***/ #include #include #include #include #include #include #include #include #include #include #include #include #include "log.h" #include "util.h" #include "macro.h" #include "set.h" #include "utmp-wtmp.h" #include "special.h" #include "initreq.h" #include "strv.h" #include "dbus-common.h" #include "cgroup-show.h" static const char *arg_type = NULL; static const char *arg_property = NULL; static bool arg_all = false; static bool arg_replace = false; static bool arg_session = false; static bool arg_no_block = false; static bool arg_immediate = false; static bool arg_no_wtmp = false; static bool arg_no_sync = false; static bool arg_no_wall = false; static bool arg_dry = false; static bool arg_quiet = false; static char **arg_wall = NULL; enum action { ACTION_INVALID, ACTION_SYSTEMCTL, ACTION_HALT, ACTION_POWEROFF, ACTION_REBOOT, ACTION_RUNLEVEL2, ACTION_RUNLEVEL3, ACTION_RUNLEVEL4, ACTION_RUNLEVEL5, ACTION_RESCUE, ACTION_EMERGENCY, ACTION_DEFAULT, ACTION_RELOAD, ACTION_REEXEC, ACTION_RUNLEVEL, _ACTION_MAX } arg_action = ACTION_SYSTEMCTL; static bool private_bus = false; static bool error_is_no_service(DBusError *error) { assert(error); if (!dbus_error_is_set(error)) return false; if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER)) return true; if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN)) return true; return startswith(error->name, "org.freedesktop.DBus.Error.Spawn."); } static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) { assert(iter); assert(data); if (dbus_message_iter_get_arg_type(iter) != type) return -EIO; dbus_message_iter_get_basic(iter, data); if (!dbus_message_iter_next(iter) != !next) return -EIO; return 0; } static void warn_wall(enum action action) { static const char *table[_ACTION_MAX] = { [ACTION_HALT] = "The system is going down for system halt NOW!", [ACTION_REBOOT] = "The system is going down for reboot NOW!", [ACTION_POWEROFF] = "The system is going down for power-off NOW!", [ACTION_RESCUE] = "The system is going down to rescue mode NOW!", [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!" }; if (arg_no_wall) return; if (arg_wall) { char *p; if (!(p = strv_join(arg_wall, " "))) { log_error("Failed to join strings."); return; } if (*p) { utmp_wall(p); free(p); return; } free(p); } if (!table[action]) return; utmp_wall(table[action]); } static int list_units(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; DBusMessageIter iter, sub, sub2; unsigned k = 0; dbus_error_init(&error); assert(bus); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "ListUnits"))) { log_error("Could not allocate message."); return -ENOMEM; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&iter, &sub); printf("%-45s %-6s %-12s %-12s %-15s %s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB", "DESCRIPTION"); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { const char *id, *description, *load_state, *active_state, *sub_state, *unit_state, *job_type, *job_path, *dot; uint32_t job_id; if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &job_id, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &job_type, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, false) < 0) { log_error("Failed to parse reply."); r = -EIO; goto finish; } if ((!arg_type || ((dot = strrchr(id, '.')) && streq(dot+1, arg_type))) && (arg_all || !streq(active_state, "inactive"))) { int a = 0, b = 0; if (streq(active_state, "maintenance")) fputs(ANSI_HIGHLIGHT_ON, stdout); printf("%-45s %-6s %-12s %-12s%n", id, load_state, active_state, sub_state, &a); if (job_id != 0) printf(" %-15s%n", job_type, &b); else b = 1 + 15; if (a + b + 2 < columns()) { if (job_id == 0) printf(" "); printf(" %.*s", columns() - a - b - 2, description); } if (streq(active_state, "maintenance")) fputs(ANSI_HIGHLIGHT_OFF, stdout); fputs("\n", stdout); k++; } dbus_message_iter_next(&sub); } if (arg_all) printf("\n%u units listed.\n", k); else printf("\n%u live units listed. Pass --all to see dead units, too.\n", k); r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int list_jobs(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; DBusMessageIter iter, sub, sub2; unsigned k = 0; dbus_error_init(&error); assert(bus); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "ListJobs"))) { log_error("Could not allocate message."); return -ENOMEM; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&iter, &sub); printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE"); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { const char *name, *type, *state, *job_path, *unit_path; uint32_t id; if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) { log_error("Failed to parse reply."); r = -EIO; goto finish; } printf("%4u %-45s %-17s %-7s\n", id, name, type, state); k++; dbus_message_iter_next(&sub); } printf("\n%u jobs listed.\n", k); r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int load_unit(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; unsigned i; dbus_error_init(&error); assert(bus); assert(args); for (i = 1; i < n; i++) { if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "LoadUnit"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &args[i], DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); dbus_message_unref(reply); m = reply = NULL; } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int cancel_job(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; unsigned i; dbus_error_init(&error); assert(bus); assert(args); for (i = 1; i < n; i++) { unsigned id; const char *path; if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetJob"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if ((r = safe_atou(args[i], &id)) < 0) { log_error("Failed to parse job id: %s", strerror(-r)); goto finish; } assert_cc(sizeof(uint32_t) == sizeof(id)); if (!dbus_message_append_args(m, DBUS_TYPE_UINT32, &id, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Job", "Cancel"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } dbus_message_unref(reply); if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); dbus_message_unref(reply); m = reply = NULL; } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } typedef struct WaitData { Set *set; bool failed; } WaitData; static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) { DBusError error; WaitData *d = data; assert(connection); assert(message); assert(d); dbus_error_init(&error); log_debug("Got D-Bus request: %s.%s() on %s", dbus_message_get_interface(message), dbus_message_get_member(message), dbus_message_get_path(message)); if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { log_error("Warning! D-Bus connection terminated."); dbus_connection_close(connection); } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) { uint32_t id; const char *path; dbus_bool_t success = true; if (!dbus_message_get_args(message, &error, DBUS_TYPE_UINT32, &id, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_BOOLEAN, &success, DBUS_TYPE_INVALID)) log_error("Failed to parse message: %s", error.message); else { char *p; if ((p = set_remove(d->set, (char*) path))) free(p); if (!success) d->failed = true; } } dbus_error_free(&error); return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; } static int enable_wait_for_jobs(DBusConnection *bus) { DBusError error; assert(bus); if (private_bus) return 0; dbus_error_init(&error); dbus_bus_add_match(bus, "type='signal'," "sender='org.freedesktop.systemd1'," "interface='org.freedesktop.systemd1.Manager'," "member='JobRemoved'," "path='/org/freedesktop/systemd1'", &error); if (dbus_error_is_set(&error)) { log_error("Failed to add match: %s", error.message); dbus_error_free(&error); return -EIO; } /* This is slightly dirty, since we don't undo the match registrations. */ return 0; } static int wait_for_jobs(DBusConnection *bus, Set *s) { int r; WaitData d; assert(bus); assert(s); zero(d); d.set = s; d.failed = false; if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) { log_error("Failed to add filter."); r = -ENOMEM; goto finish; } while (!set_isempty(s) && dbus_connection_read_write_dispatch(bus, -1)) ; if (!arg_quiet && d.failed) log_error("Job failed, see logs for details."); r = d.failed ? -EIO : 0; finish: /* This is slightly dirty, since we don't undo the filter registration. */ return r; } static int start_unit_one( DBusConnection *bus, const char *method, const char *name, const char *mode, Set *s) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; assert(bus); assert(method); assert(name); assert(mode); assert(arg_no_block || s); dbus_error_init(&error); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", method))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &mode, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) { /* There's always a fallback possible for * legacy actions. */ r = 0; goto finish; } log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!arg_no_block) { const char *path; char *p; if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } if (!(p = strdup(path))) { log_error("Failed to duplicate path."); r = -ENOMEM; goto finish; } if ((r = set_put(s, p)) < 0) { free(p); log_error("Failed to add path to set."); goto finish; } } r = 1; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static enum action verb_to_action(const char *verb) { if (streq(verb, "halt")) return ACTION_HALT; else if (streq(verb, "poweroff")) return ACTION_POWEROFF; else if (streq(verb, "reboot")) return ACTION_REBOOT; else if (streq(verb, "rescue")) return ACTION_RESCUE; else if (streq(verb, "emergency")) return ACTION_EMERGENCY; else if (streq(verb, "default")) return ACTION_DEFAULT; else return ACTION_INVALID; } static int start_unit(DBusConnection *bus, char **args, unsigned n) { static const char * const table[_ACTION_MAX] = { [ACTION_HALT] = SPECIAL_HALT_TARGET, [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET, [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET, [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET, [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET, [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET, [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET, [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET, [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_SERVICE, [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET }; int r; unsigned i; const char *method, *mode, *one_name; Set *s = NULL; assert(bus); if (arg_action == ACTION_SYSTEMCTL) { method = streq(args[0], "stop") ? "StopUnit" : streq(args[0], "reload") ? "ReloadUnit" : streq(args[0], "restart") ? "RestartUnit" : "StartUnit"; mode = (streq(args[0], "isolate") || streq(args[0], "rescue") || streq(args[0], "emergency")) ? "isolate" : arg_replace ? "replace" : "fail"; one_name = table[verb_to_action(args[0])]; } else { assert(arg_action < ELEMENTSOF(table)); assert(table[arg_action]); method = "StartUnit"; mode = (arg_action == ACTION_EMERGENCY || arg_action == ACTION_RESCUE) ? "isolate" : "replace"; one_name = table[arg_action]; } if (!arg_no_block) { if ((r = enable_wait_for_jobs(bus)) < 0) { log_error("Could not watch jobs: %s", strerror(-r)); goto finish; } if (!(s = set_new(string_hash_func, string_compare_func))) { log_error("Failed to allocate set."); r = -ENOMEM; goto finish; } } r = 0; if (one_name) { if ((r = start_unit_one(bus, method, one_name, mode, s)) <= 0) goto finish; } else { for (i = 1; i < n; i++) if ((r = start_unit_one(bus, method, args[i], mode, s)) < 0) goto finish; } if (!arg_no_block) r = wait_for_jobs(bus, s); finish: if (s) set_free_free(s); return r; } static int start_special(DBusConnection *bus, char **args, unsigned n) { assert(bus); assert(args); warn_wall(verb_to_action(args[0])); return start_unit(bus, args, n); } static int check_unit(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; const char *interface = "org.freedesktop.systemd1.Unit", *property = "ActiveState"; int r = -EADDRNOTAVAIL; DBusError error; unsigned i; assert(bus); assert(args); dbus_error_init(&error); for (i = 1; i < n; i++) { const char *path = NULL; const char *state; DBusMessageIter iter, sub; if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetUnit"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &args[i], DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { /* Hmm, cannot figure out anything about this unit... */ if (!arg_quiet) puts("unknown"); dbus_error_free(&error); continue; } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.DBus.Properties", "Get"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } dbus_message_unref(reply); if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&iter, &sub); if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_get_basic(&sub, &state); if (!arg_quiet) puts(state); if (streq(state, "active") || startswith(state, "reloading")) r = 0; dbus_message_unref(m); dbus_message_unref(reply); m = reply = NULL; } finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } typedef struct UnitStatusInfo { const char *id; const char *load_state; const char *active_state; const char *sub_state; const char *description; const char *fragment_path; const char *default_control_group; /* Service */ pid_t main_pid; pid_t control_pid; const char *status_text; bool running; usec_t start_timestamp; usec_t exit_timestamp; int exit_code, exit_status; /* Socket */ unsigned n_accepted; unsigned n_connections; /* Device */ const char *sysfs_path; /* Mount, Automount */ const char *where; /* Swap */ const char *what; } UnitStatusInfo; static void print_status_info(UnitStatusInfo *i) { assert(i); /* This shows pretty information about a unit. See * print_property() for a low-level property printer */ printf("%s", strna(i->id)); if (i->description && !streq_ptr(i->id, i->description)) printf(" - %s", i->description); printf("\n"); if (i->fragment_path) printf("\t Loaded: %s (%s)\n", strna(i->load_state), i->fragment_path); else if (streq_ptr(i->load_state, "failed")) printf("\t Loaded: " ANSI_HIGHLIGHT_ON "%s" ANSI_HIGHLIGHT_OFF "\n", strna(i->load_state)); else printf("\t Loaded: %s\n", strna(i->load_state)); if (streq_ptr(i->active_state, "maintenance")) printf("\t Active: " ANSI_HIGHLIGHT_ON "%s (%s)" ANSI_HIGHLIGHT_OFF "\n", strna(i->active_state), strna(i->sub_state)); else printf("\t Active: %s (%s)\n", strna(i->active_state), strna(i->sub_state)); if (i->sysfs_path) printf("\t Device: %s\n", i->sysfs_path); else if (i->where) printf("\t Where: %s\n", i->where); else if (i->what) printf("\t What: %s\n", i->what); if (i->status_text) printf("\t Status: \"%s\"\n", i->status_text); if (i->id && endswith(i->id, ".socket")) printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections); if (i->main_pid > 0 || i->control_pid > 0) { printf("\t"); if (i->main_pid > 0) { printf(" Process: %u", (unsigned) i->main_pid); if (i->running) { char *t = NULL; get_process_name(i->main_pid, &t); if (t) { printf(" (%s)", t); free(t); } } else { printf(" (code=%s, ", sigchld_code_to_string(i->exit_code)); if (i->exit_code == CLD_EXITED) printf("status=%i", i->exit_status); else printf("signal=%s", strsignal(i->exit_status)); printf(")"); } } if (i->main_pid > 0 && i->control_pid > 0) printf(";"); if (i->control_pid > 0) { char *t = NULL; printf(" Control: %u", (unsigned) i->control_pid); get_process_name(i->control_pid, &t); if (t) { printf(" (%s)", t); free(t); } } printf("\n"); } if (i->default_control_group) { unsigned c; printf("\t CGroup: %s\n", i->default_control_group); if ((c = columns()) > 18) c -= 18; else c = 0; show_cgroup_recursive(i->default_control_group, "\t\t ", c); } } static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) { switch (dbus_message_iter_get_arg_type(iter)) { case DBUS_TYPE_STRING: { const char *s; dbus_message_iter_get_basic(iter, &s); if (s[0]) { if (streq(name, "Id")) i->id = s; else if (streq(name, "LoadState")) i->load_state = s; else if (streq(name, "ActiveState")) i->active_state = s; else if (streq(name, "SubState")) i->sub_state = s; else if (streq(name, "Description")) i->description = s; else if (streq(name, "FragmentPath")) i->fragment_path = s; else if (streq(name, "DefaultControlGroup")) i->default_control_group = s; else if (streq(name, "StatusText")) i->status_text = s; else if (streq(name, "SysFSPath")) i->sysfs_path = s; else if (streq(name, "Where")) i->where = s; else if (streq(name, "What")) i->what = s; } break; } case DBUS_TYPE_UINT32: { uint32_t u; dbus_message_iter_get_basic(iter, &u); if (streq(name, "MainPID")) { if (u > 0) { i->main_pid = (pid_t) u; i->running = true; } } else if (streq(name, "ControlPID")) i->control_pid = (pid_t) u; else if (streq(name, "ExecMainPID")) { if (u > 0) i->main_pid = (pid_t) u; } else if (streq(name, "NAccepted")) i->n_accepted = u; else if (streq(name, "NConnections")) i->n_connections = u; break; } case DBUS_TYPE_INT32: { int32_t j; dbus_message_iter_get_basic(iter, &j); if (streq(name, "ExecMainCode")) i->exit_code = (int) j; else if (streq(name, "ExecMainStatus")) i->exit_status = (int) j; break; } case DBUS_TYPE_UINT64: { uint64_t u; dbus_message_iter_get_basic(iter, &u); if (streq(name, "ExecMainStartTimestamp")) i->start_timestamp = (usec_t) u; else if (streq(name, "ExecMainExitTimestamp")) i->exit_timestamp = (usec_t) u; break; } } return 0; } static int print_property(const char *name, DBusMessageIter *iter) { assert(name); assert(iter); /* This is a low-level property printer, see * print_status_info() for the nicer output */ if (arg_property && !streq(name, arg_property)) return 0; switch (dbus_message_iter_get_arg_type(iter)) { case DBUS_TYPE_STRING: { const char *s; dbus_message_iter_get_basic(iter, &s); if (arg_all || s[0]) printf("%s=%s\n", name, s); return 0; } case DBUS_TYPE_BOOLEAN: { dbus_bool_t b; dbus_message_iter_get_basic(iter, &b); printf("%s=%s\n", name, yes_no(b)); return 0; } case DBUS_TYPE_UINT64: { uint64_t u; dbus_message_iter_get_basic(iter, &u); /* Yes, heuristics! But we can change this check * should it turn out to not be sufficient */ if (strstr(name, "Timestamp")) { char timestamp[FORMAT_TIMESTAMP_MAX], *t; if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all) printf("%s=%s\n", name, strempty(t)); } else if (strstr(name, "USec")) { char timespan[FORMAT_TIMESPAN_MAX]; printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u)); } else printf("%s=%llu\n", name, (unsigned long long) u); return 0; } case DBUS_TYPE_UINT32: { uint32_t u; dbus_message_iter_get_basic(iter, &u); if (strstr(name, "UMask") || strstr(name, "Mode")) printf("%s=%04o\n", name, u); else printf("%s=%u\n", name, (unsigned) u); return 0; } case DBUS_TYPE_INT32: { int32_t i; dbus_message_iter_get_basic(iter, &i); printf("%s=%i\n", name, (int) i); return 0; } case DBUS_TYPE_STRUCT: { DBusMessageIter sub; dbus_message_iter_recurse(iter, &sub); if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) { uint32_t u; dbus_message_iter_get_basic(&sub, &u); if (u) printf("%s=%u\n", name, (unsigned) u); else if (arg_all) printf("%s=\n", name); return 0; } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) { const char *s; dbus_message_iter_get_basic(&sub, &s); if (arg_all || s[0]) printf("%s=%s\n", name, s); return 0; } break; } case DBUS_TYPE_ARRAY: if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) { DBusMessageIter sub; bool space = false; dbus_message_iter_recurse(iter, &sub); if (arg_all || dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { printf("%s=", name); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { const char *s; assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING); dbus_message_iter_get_basic(&sub, &s); printf("%s%s", space ? " " : "", s); space = true; dbus_message_iter_next(&sub); } puts(""); } return 0; } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) { DBusMessageIter sub; dbus_message_iter_recurse(iter, &sub); if (arg_all || dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { printf("%s=", name); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { uint8_t u; assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE); dbus_message_iter_get_basic(&sub, &u); printf("%02x", u); dbus_message_iter_next(&sub); } puts(""); } return 0; } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) { DBusMessageIter sub, sub2; dbus_message_iter_recurse(iter, &sub); while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) { const char *type, *path; dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0) printf("%s=%s\n", type, path); dbus_message_iter_next(&sub); } return 0; } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) { DBusMessageIter sub, sub2; dbus_message_iter_recurse(iter, &sub); while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) { const char *base; uint64_t value, next_elapse; dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) { char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX]; printf("%s={ value=%s ; next_elapse=%s }\n", base, format_timespan(timespan1, sizeof(timespan1), value), format_timespan(timespan2, sizeof(timespan2), next_elapse)); } dbus_message_iter_next(&sub); } return 0; } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) { DBusMessageIter sub, sub2, sub3; dbus_message_iter_recurse(iter, &sub); while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) { const char *path; uint64_t start_time, exit_time; uint32_t pid; int32_t code, status; dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0) continue; if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING) continue; printf("%s={ path=%s ; argv[]=", name, path); dbus_message_iter_recurse(&sub2, &sub3); while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) { const char *s; assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING); dbus_message_iter_get_basic(&sub3, &s); printf("%s ", s); dbus_message_iter_next(&sub3); } if (dbus_message_iter_next(&sub2) && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_time, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_time, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) >= 0 && bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) >= 0) { char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX]; printf("; start=%s ; stop=%s ; pid=%u ; code=%s ; status=%i/%s", strna(format_timestamp(timestamp1, sizeof(timestamp1), start_time)), strna(format_timestamp(timestamp2, sizeof(timestamp2), exit_time)), (unsigned) pid, sigchld_code_to_string(code), status, strempty(code == CLD_EXITED ? NULL : strsignal(status))); } printf(" }\n"); dbus_message_iter_next(&sub); } return 0; } break; } if (arg_all) printf("%s=[unprintable]\n", name); return 0; } static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) { DBusMessage *m = NULL, *reply = NULL; const char *interface = ""; int r; DBusError error; DBusMessageIter iter, sub, sub2, sub3; UnitStatusInfo info; assert(bus); assert(path); assert(new_line); zero(info); dbus_error_init(&error); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.DBus.Properties", "GetAll"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &interface, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&iter, &sub); if (*new_line) printf("\n"); *new_line = true; while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { const char *name; if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) { log_error("Failed to parse reply."); r = -EIO; goto finish; } if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&sub2, &sub3); if (show_properties) r = print_property(name, &sub3); else r = status_property(name, &sub3, &info); if (r < 0) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_next(&sub); } if (!show_properties) print_status_info(&info); r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int show(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; int r; DBusError error; unsigned i; bool show_properties, new_line = false; assert(bus); assert(args); dbus_error_init(&error); show_properties = !streq(args[0], "status"); if (show_properties && n <= 1) { /* If not argument is specified inspect the manager * itself */ r = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line); goto finish; } for (i = 1; i < n; i++) { const char *path = NULL; uint32_t id; if (!show_properties || safe_atou32(args[i], &id) < 0) { if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "LoadUnit"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &args[i], DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } dbus_error_free(&error); dbus_message_unref(m); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetUnit"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &args[i], DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } } } else { if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetJob"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_UINT32, &id, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } if ((r = show_one(bus, path, show_properties, &new_line)) < 0) goto finish; dbus_message_unref(m); dbus_message_unref(reply); m = reply = NULL; } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) { DBusError error; DBusMessage *m = NULL, *reply = NULL; assert(connection); assert(message); dbus_error_init(&error); log_debug("Got D-Bus request: %s.%s() on %s", dbus_message_get_interface(message), dbus_message_get_member(message), dbus_message_get_path(message)); if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { log_error("Warning! D-Bus connection terminated."); dbus_connection_close(connection); } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") || dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) { const char *id, *path; if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &id, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) log_error("Failed to parse message: %s", error.message); else if (streq(dbus_message_get_member(message), "UnitNew")) printf("Unit %s added.\n", id); else printf("Unit %s removed.\n", id); } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") || dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) { uint32_t id; const char *path; if (!dbus_message_get_args(message, &error, DBUS_TYPE_UINT32, &id, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) log_error("Failed to parse message: %s", error.message); else if (streq(dbus_message_get_member(message), "JobNew")) printf("Job %u added.\n", id); else printf("Job %u removed.\n", id); } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Unit", "Changed") || dbus_message_is_signal(message, "org.freedesktop.systemd1.Job", "Changed")) { const char *path, *interface, *property = "Id"; DBusMessageIter iter, sub; path = dbus_message_get_path(message); interface = dbus_message_get_interface(message); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.DBus.Properties", "Get"))) { log_error("Could not allocate message."); goto oom; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { log_error("Failed to parse reply."); goto finish; } dbus_message_iter_recurse(&iter, &sub); if (streq(interface, "org.freedesktop.systemd1.Unit")) { const char *id; if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) { log_error("Failed to parse reply."); goto finish; } dbus_message_iter_get_basic(&sub, &id); printf("Unit %s changed.\n", id); } else { uint32_t id; if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32) { log_error("Failed to parse reply."); goto finish; } dbus_message_iter_get_basic(&sub, &id); printf("Job %u changed.\n", id); } } finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; oom: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return DBUS_HANDLER_RESULT_NEED_MEMORY; } static int monitor(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; dbus_error_init(&error); if (!private_bus) { dbus_bus_add_match(bus, "type='signal'," "sender='org.freedesktop.systemd1'," "interface='org.freedesktop.systemd1.Manager'," "path='/org/freedesktop/systemd1'", &error); if (dbus_error_is_set(&error)) { log_error("Failed to add match: %s", error.message); r = -EIO; goto finish; } dbus_bus_add_match(bus, "type='signal'," "sender='org.freedesktop.systemd1'," "interface='org.freedesktop.systemd1.Unit'," "member='Changed'", &error); if (dbus_error_is_set(&error)) { log_error("Failed to add match: %s", error.message); r = -EIO; goto finish; } dbus_bus_add_match(bus, "type='signal'," "sender='org.freedesktop.systemd1'," "interface='org.freedesktop.systemd1.Job'," "member='Changed'", &error); if (dbus_error_is_set(&error)) { log_error("Failed to add match: %s", error.message); r = -EIO; goto finish; } } if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) { log_error("Failed to add filter."); r = -ENOMEM; goto finish; } if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "Subscribe"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } while (dbus_connection_read_write_dispatch(bus, -1)) ; r = 0; finish: /* This is slightly dirty, since we don't undo the filter or the matches. */ if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int dump(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; const char *text; dbus_error_init(&error); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "Dump"))) { log_error("Could not allocate message."); return -ENOMEM; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_STRING, &text, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } fputs(text, stdout); r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int snapshot(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; const char *name = "", *path, *id; dbus_bool_t cleanup = FALSE; DBusMessageIter iter, sub; const char *interface = "org.freedesktop.systemd1.Unit", *property = "Id"; dbus_error_init(&error); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "CreateSnapshot"))) { log_error("Could not allocate message."); return -ENOMEM; } if (n > 1) name = args[1]; if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &name, DBUS_TYPE_BOOLEAN, &cleanup, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.DBus.Properties", "Get"))) { log_error("Could not allocate message."); return -ENOMEM; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } dbus_message_unref(reply); if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&iter, &sub); if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_get_basic(&sub, &id); if (!arg_quiet) puts(id); r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; int r; DBusError error; unsigned i; assert(bus); assert(args); dbus_error_init(&error); for (i = 1; i < n; i++) { const char *path = NULL; if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetUnit"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &args[i], DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Snapshot", "Remove"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } dbus_message_unref(reply); if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } dbus_message_unref(m); dbus_message_unref(reply); m = reply = NULL; } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int clear_jobs(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; const char *method; dbus_error_init(&error); if (arg_action == ACTION_RELOAD) method = "Reload"; else if (arg_action == ACTION_REEXEC) method = "Reexecute"; else { assert(arg_action == ACTION_SYSTEMCTL); method = streq(args[0], "clear-jobs") ? "ClearJobs" : streq(args[0], "daemon-reload") ? "Reload" : streq(args[0], "daemon-reexec") ? "Reexecute" : "Exit"; } if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", method))) { log_error("Could not allocate message."); return -ENOMEM; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) { /* There's always a fallback possible for * legacy actions. */ r = 0; goto finish; } log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } r = 1; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int show_enviroment(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; DBusMessageIter iter, sub, sub2; int r; const char *interface = "org.freedesktop.systemd1.Manager", *property = "Environment"; dbus_error_init(&error); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.DBus.Properties", "Get"))) { log_error("Could not allocate message."); return -ENOMEM; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&iter, &sub); if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_recurse(&sub, &sub2); while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) { const char *text; if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_get_basic(&sub2, &text); printf("%s\n", text); dbus_message_iter_next(&sub2); } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int set_environment(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; const char *method; DBusMessageIter iter, sub; unsigned i; dbus_error_init(&error); method = streq(args[0], "set-environment") ? "SetEnvironment" : "UnsetEnvironment"; if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", method))) { log_error("Could not allocate message."); return -ENOMEM; } dbus_message_iter_init_append(m, &iter); if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } for (i = 1; i < n; i++) if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!dbus_message_iter_close_container(&iter, &sub)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int systemctl_help(void) { printf("%s [OPTIONS...] {COMMAND} ...\n\n" "Send control commands to the systemd manager.\n\n" " -h --help Show this help\n" " -t --type=TYPE List only units of a particular type\n" " -p --property=NAME Show only properties by this name\n" " -a --all Show all units/properties, including dead/empty ones\n" " --replace When installing a new job, replace existing conflicting ones\n" " --system Connect to system bus\n" " --session Connect to session bus\n" " -q --quiet Suppress output\n" " --no-block Do not wait until operation finished\n" " --no-wall Don't send wall message before halt/power-off/reboot\n\n" "Commands:\n" " list-units List units\n" " start [NAME...] Start one or more units\n" " stop [NAME...] Stop one or more units\n" " restart [NAME...] Restart one or more units\n" " reload [NAME...] Reload one or more units\n" " isolate [NAME] Start one unit and stop all others\n" " check [NAME...] Check whether any of the passed units are active\n" " status [NAME...] Show status of one or more units\n" " show [NAME...|JOB...] Show properties of one or more units/jobs/manager\n" " load [NAME...] Load one or more units\n" " list-jobs List jobs\n" " cancel [JOB...] Cancel one or more jobs\n" " clear-jobs Cancel all jobs\n" " monitor Monitor unit/job changes\n" " dump Dump server status\n" " snapshot [NAME] Create a snapshot\n" " delete [NAME...] Remove one or more snapshots\n" " daemon-reload Reload systemd manager configuration\n" " daemon-reexec Reexecute systemd manager\n" " daemon-exit Ask the systemd manager to quit\n" " show-environment Dump environment\n" " set-environment [NAME=VALUE...] Set one or more environment variables\n" " unset-environment [NAME...] Unset one or more environment variables\n" " halt Shut down and halt the system\n" " poweroff Shut down and power-off the system\n" " reboot Shut down and reboot the system\n" " default Enter default mode\n" " rescue Enter rescue mode\n" " emergency Enter emergency mode\n", program_invocation_short_name); return 0; } static int halt_help(void) { printf("%s [OPTIONS...]\n\n" "%s the system.\n\n" " --help Show this help\n" " --halt Halt the machine\n" " -p --poweroff Switch off the machine\n" " --reboot Reboot the machine\n" " -f --force Force immediate halt/power-off/reboot\n" " -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n" " -d --no-wtmp Don't write wtmp record\n" " -n --no-sync Don't sync before halt/power-off/reboot\n" " --no-wall Don't send wall message before halt/power-off/reboot\n", program_invocation_short_name, arg_action == ACTION_REBOOT ? "Reboot" : arg_action == ACTION_POWEROFF ? "Power off" : "Halt"); return 0; } static int shutdown_help(void) { printf("%s [OPTIONS...] [now] [WALL...]\n\n" "Shut down the system.\n\n" " --help Show this help\n" " -H --halt Halt the machine\n" " -P --poweroff Power-off the machine\n" " -r --reboot Reboot the machine\n" " -h Equivalent to --poweroff, overriden by --halt\n" " -k Don't halt/power-off/reboot, just send warnings\n" " --no-wall Don't send wall message before halt/power-off/reboot\n", program_invocation_short_name); return 0; } static int telinit_help(void) { printf("%s [OPTIONS...] {COMMAND}\n\n" "Send control commands to the init daemon.\n\n" " --help Show this help\n" " --no-wall Don't send wall message before halt/power-off/reboot\n\n" "Commands:\n" " 0 Power-off the machine\n" " 6 Reboot the machine\n" " 2, 3, 4, 5 Start runlevelX.target unit\n" " 1, s, S Enter rescue mode\n" " q, Q Reload init daemon configuration\n" " u, U Reexecute init daemon\n", program_invocation_short_name); return 0; } static int runlevel_help(void) { printf("%s [OPTIONS...]\n\n" "Prints the previous and current runlevel of the init system.\n\n" " --help Show this help\n", program_invocation_short_name); return 0; } static int systemctl_parse_argv(int argc, char *argv[]) { enum { ARG_REPLACE = 0x100, ARG_SESSION, ARG_SYSTEM, ARG_NO_BLOCK, ARG_NO_WALL }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "type", required_argument, NULL, 't' }, { "property", required_argument, NULL, 'p' }, { "all", no_argument, NULL, 'a' }, { "replace", no_argument, NULL, ARG_REPLACE }, { "session", no_argument, NULL, ARG_SESSION }, { "system", no_argument, NULL, ARG_SYSTEM }, { "no-block", no_argument, NULL, ARG_NO_BLOCK }, { "no-wall", no_argument, NULL, ARG_NO_WALL }, { "quiet", no_argument, NULL, 'q' }, { NULL, 0, NULL, 0 } }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "ht:p:aq", options, NULL)) >= 0) { switch (c) { case 'h': systemctl_help(); return 0; case 't': arg_type = optarg; break; case 'p': arg_property = optarg; /* If the user asked for a particular * property, show it to him, even if it is * empty. */ arg_all = true; break; case 'a': arg_all = true; break; case ARG_REPLACE: arg_replace = true; break; case ARG_SESSION: arg_session = true; break; case ARG_SYSTEM: arg_session = false; break; case ARG_NO_BLOCK: arg_no_block = true; break; case ARG_NO_WALL: arg_no_wall = true; break; case 'q': arg_quiet = true; break; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } return 1; } static int halt_parse_argv(int argc, char *argv[]) { enum { ARG_HELP = 0x100, ARG_HALT, ARG_REBOOT, ARG_NO_WALL }; static const struct option options[] = { { "help", no_argument, NULL, ARG_HELP }, { "halt", no_argument, NULL, ARG_HALT }, { "poweroff", no_argument, NULL, 'p' }, { "reboot", no_argument, NULL, ARG_REBOOT }, { "force", no_argument, NULL, 'f' }, { "wtmp-only", no_argument, NULL, 'w' }, { "no-wtmp", no_argument, NULL, 'd' }, { "no-sync", no_argument, NULL, 'n' }, { "no-wall", no_argument, NULL, ARG_NO_WALL }, { NULL, 0, NULL, 0 } }; int c, runlevel; assert(argc >= 0); assert(argv); if (utmp_get_runlevel(&runlevel, NULL) >= 0) if (runlevel == '0' || runlevel == '6') arg_immediate = true; while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) { switch (c) { case ARG_HELP: halt_help(); return 0; case ARG_HALT: arg_action = ACTION_HALT; break; case 'p': arg_action = ACTION_POWEROFF; break; case ARG_REBOOT: arg_action = ACTION_REBOOT; break; case 'f': arg_immediate = true; break; case 'w': arg_dry = true; break; case 'd': arg_no_wtmp = true; break; case 'n': arg_no_sync = true; break; case ARG_NO_WALL: arg_no_wall = true; break; case 'i': case 'h': /* Compatibility nops */ break; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } if (optind < argc) { log_error("Too many arguments."); return -EINVAL; } return 1; } static int shutdown_parse_argv(int argc, char *argv[]) { enum { ARG_HELP = 0x100, ARG_NO_WALL }; static const struct option options[] = { { "help", no_argument, NULL, ARG_HELP }, { "halt", no_argument, NULL, 'H' }, { "poweroff", no_argument, NULL, 'P' }, { "reboot", no_argument, NULL, 'r' }, { "no-wall", no_argument, NULL, ARG_NO_WALL }, { NULL, 0, NULL, 0 } }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "HPrhkt:a", options, NULL)) >= 0) { switch (c) { case ARG_HELP: shutdown_help(); return 0; case 'H': arg_action = ACTION_HALT; break; case 'P': arg_action = ACTION_POWEROFF; break; case 'r': arg_action = ACTION_REBOOT; break; case 'h': if (arg_action != ACTION_HALT) arg_action = ACTION_POWEROFF; break; case 'k': arg_dry = true; break; case ARG_NO_WALL: arg_no_wall = true; break; case 't': case 'a': /* Compatibility nops */ break; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } if (argc > optind && !streq(argv[optind], "now")) log_warning("First argument '%s' isn't 'now'. Ignoring.", argv[optind]); /* We ignore the time argument */ if (argc > optind + 1) arg_wall = argv + optind + 1; optind = argc; return 1; } static int telinit_parse_argv(int argc, char *argv[]) { enum { ARG_HELP = 0x100, ARG_NO_WALL }; static const struct option options[] = { { "help", no_argument, NULL, ARG_HELP }, { "no-wall", no_argument, NULL, ARG_NO_WALL }, { NULL, 0, NULL, 0 } }; static const struct { char from; enum action to; } table[] = { { '0', ACTION_POWEROFF }, { '6', ACTION_REBOOT }, { '1', ACTION_RESCUE }, { '2', ACTION_RUNLEVEL2 }, { '3', ACTION_RUNLEVEL3 }, { '4', ACTION_RUNLEVEL4 }, { '5', ACTION_RUNLEVEL5 }, { 's', ACTION_RESCUE }, { 'S', ACTION_RESCUE }, { 'q', ACTION_RELOAD }, { 'Q', ACTION_RELOAD }, { 'u', ACTION_REEXEC }, { 'U', ACTION_REEXEC } }; unsigned i; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) { switch (c) { case ARG_HELP: telinit_help(); return 0; case ARG_NO_WALL: arg_no_wall = true; break; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } if (optind >= argc) { telinit_help(); return -EINVAL; } if (optind + 1 < argc) { log_error("Too many arguments."); return -EINVAL; } if (strlen(argv[optind]) != 1) { log_error("Expected single character argument."); return -EINVAL; } for (i = 0; i < ELEMENTSOF(table); i++) if (table[i].from == argv[optind][0]) break; if (i >= ELEMENTSOF(table)) { log_error("Unknown command %s.", argv[optind]); return -EINVAL; } arg_action = table[i].to; optind ++; return 1; } static int runlevel_parse_argv(int argc, char *argv[]) { enum { ARG_HELP = 0x100, }; static const struct option options[] = { { "help", no_argument, NULL, ARG_HELP }, { NULL, 0, NULL, 0 } }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) { switch (c) { case ARG_HELP: runlevel_help(); return 0; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } if (optind < argc) { log_error("Too many arguments."); return -EINVAL; } return 1; } static int parse_argv(int argc, char *argv[]) { assert(argc >= 0); assert(argv); if (program_invocation_short_name) { if (strstr(program_invocation_short_name, "halt")) { arg_action = ACTION_HALT; return halt_parse_argv(argc, argv); } else if (strstr(program_invocation_short_name, "poweroff")) { arg_action = ACTION_POWEROFF; return halt_parse_argv(argc, argv); } else if (strstr(program_invocation_short_name, "reboot")) { arg_action = ACTION_REBOOT; return halt_parse_argv(argc, argv); } else if (strstr(program_invocation_short_name, "shutdown")) { arg_action = ACTION_POWEROFF; return shutdown_parse_argv(argc, argv); } else if (strstr(program_invocation_short_name, "init")) { arg_action = ACTION_INVALID; return telinit_parse_argv(argc, argv); } else if (strstr(program_invocation_short_name, "runlevel")) { arg_action = ACTION_RUNLEVEL; return runlevel_parse_argv(argc, argv); } } arg_action = ACTION_SYSTEMCTL; return systemctl_parse_argv(argc, argv); } static int action_to_runlevel(void) { static const char table[_ACTION_MAX] = { [ACTION_HALT] = '0', [ACTION_POWEROFF] = '0', [ACTION_REBOOT] = '6', [ACTION_RUNLEVEL2] = '2', [ACTION_RUNLEVEL3] = '3', [ACTION_RUNLEVEL4] = '4', [ACTION_RUNLEVEL5] = '5', [ACTION_RESCUE] = '1' }; assert(arg_action < _ACTION_MAX); return table[arg_action]; } static int talk_upstart(void) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int previous, rl, r; char env1_buf[] = "RUNLEVEL=X", env2_buf[] = "PREVLEVEL=X"; char *env1 = env1_buf, *env2 = env2_buf; const char *emit = "runlevel"; dbus_bool_t b_false = FALSE; DBusMessageIter iter, sub; DBusConnection *bus; dbus_error_init(&error); if (!(rl = action_to_runlevel())) return 0; if (utmp_get_runlevel(&previous, NULL) < 0) previous = 'N'; if (!(bus = dbus_connection_open("unix:abstract=/com/ubuntu/upstart", &error))) { if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) { r = 0; goto finish; } log_error("Failed to connect to Upstart bus: %s", error.message); r = -EIO; goto finish; } if ((r = bus_check_peercred(bus)) < 0) { log_error("Failed to verify owner of bus."); goto finish; } if (!(m = dbus_message_new_method_call( "com.ubuntu.Upstart", "/com/ubuntu/Upstart", "com.ubuntu.Upstart0_6", "EmitEvent"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } dbus_message_iter_init_append(m, &iter); env1_buf[sizeof(env1_buf)-2] = rl; env2_buf[sizeof(env2_buf)-2] = previous; if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) || !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) || !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) || !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) || !dbus_message_iter_close_container(&iter, &sub) || !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) { log_error("Could not append arguments to message."); r = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { if (error_is_no_service(&error)) { r = 0; goto finish; } log_error("Failed to issue method call: %s", error.message); r = -EIO; goto finish; } r = 1; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); if (bus) dbus_connection_unref(bus); dbus_error_free(&error); return r; } static int talk_initctl(void) { struct init_request request; int r, fd; char rl; if (!(rl = action_to_runlevel())) return 0; zero(request); request.magic = INIT_MAGIC; request.sleeptime = 0; request.cmd = INIT_CMD_RUNLVL; request.runlevel = rl; if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) { if (errno == ENOENT) return 0; log_error("Failed to open "INIT_FIFO": %m"); return -errno; } errno = 0; r = loop_write(fd, &request, sizeof(request), false) != sizeof(request); close_nointr_nofail(fd); if (r < 0) { log_error("Failed to write to "INIT_FIFO": %m"); return errno ? -errno : -EIO; } return 1; } static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) { static const struct { const char* verb; const enum { MORE, LESS, EQUAL } argc_cmp; const int argc; int (* const dispatch)(DBusConnection *bus, char **args, unsigned n); } verbs[] = { { "list-units", LESS, 1, list_units }, { "list-jobs", EQUAL, 1, list_jobs }, { "clear-jobs", EQUAL, 1, clear_jobs }, { "load", MORE, 2, load_unit }, { "cancel", MORE, 2, cancel_job }, { "start", MORE, 2, start_unit }, { "stop", MORE, 2, start_unit }, { "reload", MORE, 2, start_unit }, { "restart", MORE, 2, start_unit }, { "isolate", EQUAL, 2, start_unit }, { "check", MORE, 2, check_unit }, { "show", MORE, 1, show }, { "status", MORE, 2, show }, { "monitor", EQUAL, 1, monitor }, { "dump", EQUAL, 1, dump }, { "snapshot", LESS, 2, snapshot }, { "delete", MORE, 2, delete_snapshot }, { "daemon-reload", EQUAL, 1, clear_jobs }, { "daemon-reexec", EQUAL, 1, clear_jobs }, { "daemon-exit", EQUAL, 1, clear_jobs }, { "show-environment", EQUAL, 1, show_enviroment }, { "set-environment", MORE, 2, set_environment }, { "unset-environment", MORE, 2, set_environment }, { "halt", EQUAL, 1, start_special }, { "poweroff", EQUAL, 1, start_special }, { "reboot", EQUAL, 1, start_special }, { "default", EQUAL, 1, start_special }, { "rescue", EQUAL, 1, start_special }, { "emergency", EQUAL, 1, start_special } }; int left; unsigned i; assert(bus); assert(argc >= 0); assert(argv); left = argc - optind; if (left <= 0) /* Special rule: no arguments means "list-units" */ i = 0; else { if (streq(argv[optind], "help")) { systemctl_help(); return 0; } for (i = 0; i < ELEMENTSOF(verbs); i++) if (streq(argv[optind], verbs[i].verb)) break; if (i >= ELEMENTSOF(verbs)) { log_error("Unknown operation %s", argv[optind]); return -EINVAL; } } switch (verbs[i].argc_cmp) { case EQUAL: if (left != verbs[i].argc) { log_error("Invalid number of arguments."); return -EINVAL; } break; case MORE: if (left < verbs[i].argc) { log_error("Too few arguments."); return -EINVAL; } break; case LESS: if (left > verbs[i].argc) { log_error("Too many arguments."); return -EINVAL; } break; default: assert_not_reached("Unknown comparison operator."); } return verbs[i].dispatch(bus, argv + optind, left); } static int reload_with_fallback(DBusConnection *bus) { int r; if (bus) { /* First, try systemd via D-Bus. */ if ((r = clear_jobs(bus, NULL, 0)) > 0) return 0; } /* Nothing else worked, so let's try signals */ assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC); if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) { log_error("kill() failed: %m"); return -errno; } return 0; } static int start_with_fallback(DBusConnection *bus) { int r; warn_wall(arg_action); if (bus) { /* First, try systemd via D-Bus. */ if ((r = start_unit(bus, NULL, 0)) > 0) return 0; /* Hmm, talking to systemd via D-Bus didn't work. Then * let's try to talk to Upstart via D-Bus. */ if ((r = talk_upstart()) > 0) return 0; } /* Nothing else worked, so let's try * /dev/initctl */ if ((r = talk_initctl()) != 0) return 0; log_error("Failed to talk to init daemon."); return -EIO; } static int halt_main(DBusConnection *bus) { int r; if (!arg_dry && !arg_immediate) return start_with_fallback(bus); if (!arg_no_wtmp) if ((r = utmp_put_shutdown(0)) < 0) log_warning("Failed to write utmp record: %s", strerror(-r)); if (!arg_no_sync) sync(); if (arg_dry) return 0; /* Make sure C-A-D is handled by the kernel from this * point on... */ reboot(RB_ENABLE_CAD); switch (arg_action) { case ACTION_HALT: log_info("Halting"); reboot(RB_HALT_SYSTEM); break; case ACTION_POWEROFF: log_info("Powering off"); reboot(RB_POWER_OFF); break; case ACTION_REBOOT: log_info("Rebooting"); reboot(RB_AUTOBOOT); break; default: assert_not_reached("Unknown halt action."); } /* We should never reach this. */ return -ENOSYS; } static int runlevel_main(void) { int r, runlevel, previous; if ((r = utmp_get_runlevel(&runlevel, &previous)) < 0) { printf("unknown"); return r; } printf("%c %c\n", previous <= 0 ? 'N' : previous, runlevel <= 0 ? 'N' : runlevel); return 0; } int main(int argc, char*argv[]) { int r, retval = 1; DBusConnection *bus = NULL; DBusError error; dbus_error_init(&error); log_parse_environment(); if ((r = parse_argv(argc, argv)) < 0) goto finish; else if (r == 0) { retval = 0; goto finish; } /* /sbin/runlevel doesn't need to communicate via D-Bus, so * let's shortcut this */ if (arg_action == ACTION_RUNLEVEL) { retval = runlevel_main() < 0; goto finish; } bus_connect(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &bus, &private_bus, &error); switch (arg_action) { case ACTION_SYSTEMCTL: { if (!bus) { log_error("Failed to get D-Bus connection: %s", error.message); goto finish; } retval = systemctl_main(bus, argc, argv) < 0; break; } case ACTION_HALT: case ACTION_POWEROFF: case ACTION_REBOOT: retval = halt_main(bus) < 0; break; case ACTION_RUNLEVEL2: case ACTION_RUNLEVEL3: case ACTION_RUNLEVEL4: case ACTION_RUNLEVEL5: case ACTION_RESCUE: case ACTION_EMERGENCY: case ACTION_DEFAULT: retval = start_with_fallback(bus) < 0; break; case ACTION_RELOAD: case ACTION_REEXEC: retval = reload_with_fallback(bus) < 0; break; case ACTION_INVALID: case ACTION_RUNLEVEL: default: assert_not_reached("Unknown action"); } finish: if (bus) dbus_connection_unref(bus); dbus_error_free(&error); dbus_shutdown(); return retval; }