/*-*- 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 . ***/ #include #include #include #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" #include "cgroup-util.h" #include "list.h" #include "path-lookup.h" #include "conf-parser.h" #include "sd-daemon.h" #include "shutdownd.h" #include "exit-status.h" #include "bus-errors.h" #include "build.h" #include "unit-name.h" static const char *arg_type = NULL; static char **arg_property = NULL; static bool arg_all = false; static bool arg_fail = false; static bool arg_user = false; static bool arg_global = false; static bool arg_immediate = false; static bool arg_no_block = false; static bool arg_no_wtmp = false; static bool arg_no_sync = false; static bool arg_no_wall = false; static bool arg_no_reload = false; static bool arg_dry = false; static bool arg_quiet = false; static bool arg_full = false; static bool arg_force = false; static bool arg_defaults = false; static bool arg_ask_password = false; static char **arg_wall = NULL; static const char *arg_kill_who = NULL; static const char *arg_kill_mode = NULL; static int arg_signal = SIGTERM; static usec_t arg_when = 0; static enum action { ACTION_INVALID, ACTION_SYSTEMCTL, ACTION_HALT, ACTION_POWEROFF, ACTION_REBOOT, ACTION_KEXEC, ACTION_EXIT, ACTION_RUNLEVEL2, ACTION_RUNLEVEL3, ACTION_RUNLEVEL4, ACTION_RUNLEVEL5, ACTION_RESCUE, ACTION_EMERGENCY, ACTION_DEFAULT, ACTION_RELOAD, ACTION_REEXEC, ACTION_RUNLEVEL, ACTION_CANCEL_SHUTDOWN, _ACTION_MAX } arg_action = ACTION_SYSTEMCTL; static enum dot { DOT_ALL, DOT_ORDER, DOT_REQUIRE } arg_dot = DOT_ALL; static bool private_bus = false; static int daemon_reload(DBusConnection *bus, char **args, unsigned n); static bool on_tty(void) { static int t = -1; if (_unlikely_(t < 0)) t = isatty(STDOUT_FILENO) > 0; return t; } static void spawn_ask_password_agent(void) { pid_t parent, child; /* We check STDIN here, not STDOUT, since this is about input, * not output */ if (!isatty(STDIN_FILENO)) return; if (!arg_ask_password) return; parent = getpid(); /* Spawns a temporary TTY agent, making sure it goes away when * we go away */ if ((child = fork()) < 0) return; if (child == 0) { /* In the child */ const char * const args[] = { SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL }; if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) _exit(EXIT_FAILURE); /* Check whether our parent died before we were able * to set the death signal */ if (getppid() != parent) _exit(EXIT_SUCCESS); execv(args[0], (char **) args); _exit(EXIT_FAILURE); } } static const char *ansi_highlight(bool b) { if (!on_tty()) return ""; return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF; } static const char *ansi_highlight_green(bool b) { if (!on_tty()) return ""; return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF; } static bool error_is_no_service(const 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 translate_bus_error_to_exit_status(int r, const DBusError *error) { assert(error); if (!dbus_error_is_set(error)) return r; if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) || dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) || dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) || dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE)) return EXIT_NOPERMISSION; if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT)) return EXIT_NOTINSTALLED; if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) || dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED)) return EXIT_NOTIMPLEMENTED; if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) return EXIT_NOTCONFIGURED; if (r != 0) return r; return EXIT_FAILURE; } 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_KEXEC] = "The system is going down for kexec reboot 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, NULL); free(p); return; } free(p); } if (!table[action]) return; utmp_wall(table[action], NULL); } struct unit_info { const char *id; const char *description; const char *load_state; const char *active_state; const char *sub_state; const char *following; const char *unit_path; uint32_t job_id; const char *job_type; const char *job_path; }; static int compare_unit_info(const void *a, const void *b) { const char *d1, *d2; const struct unit_info *u = a, *v = b; d1 = strrchr(u->id, '.'); d2 = strrchr(v->id, '.'); if (d1 && d2) { int r; if ((r = strcasecmp(d1, d2)) != 0) return r; } return strcasecmp(u->id, v->id); } static bool output_show_job(const struct unit_info *u) { const char *dot; return (!arg_type || ((dot = strrchr(u->id, '.')) && streq(dot+1, arg_type))) && (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0); } static void output_units_list(const struct unit_info *unit_infos, unsigned c) { unsigned active_len, sub_len, job_len, n_shown = 0; const struct unit_info *u; active_len = sizeof("ACTIVE")-1; sub_len = sizeof("SUB")-1; job_len = sizeof("JOB")-1; for (u = unit_infos; u < unit_infos + c; u++) { if (!output_show_job(u)) continue; active_len = MAX(active_len, strlen(u->active_state)); sub_len = MAX(sub_len, strlen(u->sub_state)); if (u->job_id != 0) job_len = MAX(job_len, strlen(u->job_type)); } if (on_tty()) { printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD", active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB"); if (columns() >= 80+12 || arg_full) printf(" %s\n", "DESCRIPTION"); else printf("\n"); } for (u = unit_infos; u < unit_infos + c; u++) { char *e; int a = 0, b = 0; const char *on_loaded, *off_loaded; const char *on_active, *off_active; if (!output_show_job(u)) continue; n_shown++; if (!streq(u->load_state, "loaded") && !streq(u->load_state, "banned")) { on_loaded = ansi_highlight(true); off_loaded = ansi_highlight(false); } else on_loaded = off_loaded = ""; if (streq(u->active_state, "failed")) { on_active = ansi_highlight(true); off_active = ansi_highlight(false); } else on_active = off_active = ""; e = arg_full ? NULL : ellipsize(u->id, 25, 33); printf("%-25s %s%-6s%s %s%-*s %-*s%s%n", e ? e : u->id, on_loaded, u->load_state, off_loaded, on_active, active_len, u->active_state, sub_len, u->sub_state, off_active, &a); free(e); a -= strlen(on_loaded) + strlen(off_loaded); a -= strlen(on_active) + strlen(off_active); if (u->job_id != 0) printf(" %-*s", job_len, u->job_type); else b = 1 + job_len; if (a + b + 1 < columns()) { if (u->job_id == 0) printf(" %-*s", job_len, ""); if (arg_full) printf(" %s", u->description); else printf(" %.*s", columns() - a - b - 1, u->description); } fputs("\n", stdout); } if (on_tty()) { printf("\nLOAD = Reflects whether the unit definition was properly loaded.\n" "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n" "SUB = The low-level unit activation state, values depend on unit type.\n" "JOB = Pending job for the unit.\n"); if (arg_all) printf("\n%u units listed.\n", n_shown); else printf("\n%u units listed. Pass --all to see inactive units, too.\n", n_shown); } } static int list_units(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; DBusMessageIter iter, sub, sub2; unsigned c = 0, n_units = 0; struct unit_info *unit_infos = NULL; 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", bus_error_message(&error)); 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); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { struct unit_info *u; if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) { log_error("Failed to parse reply."); r = -EIO; goto finish; } if (c >= n_units) { struct unit_info *w; n_units = MAX(2*c, 16); w = realloc(unit_infos, sizeof(struct unit_info) * n_units); if (!w) { log_error("Failed to allocate unit array."); r = -ENOMEM; goto finish; } unit_infos = w; } u = unit_infos+c; dbus_message_iter_recurse(&sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_next(&sub); c++; } qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info); output_units_list(unit_infos, c); r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); free(unit_infos); dbus_error_free(&error); return r; } static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) { static const char * const colors[] = { "Requires", "[color=\"black\"]", "RequiresOverridable", "[color=\"black\"]", "Requisite", "[color=\"darkblue\"]", "RequisiteOverridable", "[color=\"darkblue\"]", "Wants", "[color=\"darkgrey\"]", "Conflicts", "[color=\"red\"]", "ConflictedBy", "[color=\"red\"]", "After", "[color=\"green\"]" }; const char *c = NULL; unsigned i; assert(name); assert(prop); assert(iter); for (i = 0; i < ELEMENTSOF(colors); i += 2) if (streq(colors[i], prop)) { c = colors[i+1]; break; } if (!c) return 0; if (arg_dot != DOT_ALL) if ((arg_dot == DOT_ORDER) != streq(prop, "After")) return 0; switch (dbus_message_iter_get_arg_type(iter)) { case DBUS_TYPE_ARRAY: if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) { DBusMessageIter sub; dbus_message_iter_recurse(iter, &sub); 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("\t\"%s\"->\"%s\" %s;\n", name, s, c); dbus_message_iter_next(&sub); } return 0; } } return 0; } static int dot_one(DBusConnection *bus, const char *name, const char *path) { DBusMessage *m = NULL, *reply = NULL; const char *interface = "org.freedesktop.systemd1.Unit"; int r; DBusError error; DBusMessageIter iter, sub, sub2, sub3; assert(bus); assert(path); 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", bus_error_message(&error)); 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); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { const char *prop; 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, &prop, 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 (dot_one_property(name, prop, &sub3)) { log_error("Failed to parse reply."); r = -EIO; goto finish; } dbus_message_iter_next(&sub); } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return r; } static int dot(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; DBusError error; int r; DBusMessageIter iter, sub, sub2; 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", bus_error_message(&error)); 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; } printf("digraph systemd {\n"); dbus_message_iter_recurse(&iter, &sub); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path; 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_STRING, &following, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) { log_error("Failed to parse reply."); r = -EIO; goto finish; } if ((r = dot_one(bus, id, unit_path)) < 0) goto finish; /* printf("\t\"%s\";\n", id); */ dbus_message_iter_next(&sub); } printf("}\n"); log_info(" Color legend: black = Requires\n" " dark blue = Requisite\n" " dark grey = Wants\n" " red = Conflicts\n" " green = After\n"); if (isatty(fileno(stdout))) log_notice("-- You probably want to process this output with graphviz' dot tool.\n" "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n"); 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", bus_error_message(&error)); 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); if (isatty(STDOUT_FILENO)) printf("%4s %-25s %-15s %-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; char *e; 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; } e = arg_full ? NULL : ellipsize(name, 25, 33); printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state); free(e); k++; dbus_message_iter_next(&sub); } if (isatty(STDOUT_FILENO)) 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", bus_error_message(&error)); 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); if (n <= 1) return daemon_reload(bus, args, n); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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 bool need_daemon_reload(DBusConnection *bus, const char *unit) { DBusMessage *m = NULL, *reply = NULL; dbus_bool_t b = FALSE; DBusMessageIter iter, sub; const char *interface = "org.freedesktop.systemd1.Unit", *property = "NeedDaemonReload", *path; /* We ignore all errors here, since this is used to show a warning only */ if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetUnit"))) goto finish; if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &unit, DBUS_TYPE_INVALID)) goto finish; if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL))) goto finish; if (!dbus_message_get_args(reply, NULL, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) goto finish; dbus_message_unref(m); if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", path, "org.freedesktop.DBus.Properties", "Get"))) goto finish; if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) { goto finish; } dbus_message_unref(reply); if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL))) goto finish; if (!dbus_message_iter_init(reply, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) goto finish; dbus_message_iter_recurse(&iter, &sub); if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN) goto finish; dbus_message_iter_get_basic(&sub, &b); finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); return b; } 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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 system logs and 'systemctl status' 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, DBusError *error, Set *s) { DBusMessage *m = NULL, *reply = NULL; const char *path; int r; assert(bus); assert(method); assert(name); assert(mode); assert(error); assert(arg_no_block || s); 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 = -EADDRNOTAVAIL; goto finish; } log_error("Failed to issue method call: %s", bus_error_message(error)); 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", bus_error_message(error)); r = -EIO; goto finish; } if (need_daemon_reload(bus, name)) log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.", arg_user ? "--user" : "--system"); if (!arg_no_block) { char *p; 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 = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); 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, "kexec")) return ACTION_KEXEC; 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 if (streq(verb, "exit")) return ACTION_EXIT; 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_KEXEC] = SPECIAL_KEXEC_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_TARGET, [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET, [ACTION_EXIT] = SPECIAL_EXIT_TARGET }; int r, ret = 0; unsigned i; const char *method, *mode, *one_name; Set *s = NULL; DBusError error; dbus_error_init(&error); assert(bus); spawn_ask_password_agent(); if (arg_action == ACTION_SYSTEMCTL) { method = streq(args[0], "stop") ? "StopUnit" : streq(args[0], "reload") ? "ReloadUnit" : streq(args[0], "restart") ? "RestartUnit" : streq(args[0], "try-restart") || streq(args[0], "condrestart") ? "TryRestartUnit" : streq(args[0], "reload-or-restart") ? "ReloadOrRestartUnit" : streq(args[0], "reload-or-try-restart") || streq(args[0], "force-reload") ? "ReloadOrTryRestartUnit" : "StartUnit"; mode = (streq(args[0], "isolate") || streq(args[0], "rescue") || streq(args[0], "emergency")) ? "isolate" : arg_fail ? "fail" : "replace"; 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 || arg_action == ACTION_RUNLEVEL2 || arg_action == ACTION_RUNLEVEL3 || arg_action == ACTION_RUNLEVEL4 || arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace"; one_name = table[arg_action]; } if (!arg_no_block) { if ((ret = enable_wait_for_jobs(bus)) < 0) { log_error("Could not watch jobs: %s", strerror(-ret)); goto finish; } if (!(s = set_new(string_hash_func, string_compare_func))) { log_error("Failed to allocate set."); ret = -ENOMEM; goto finish; } } if (one_name) { if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0) goto finish; } else { for (i = 1; i < n; i++) if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) { ret = translate_bus_error_to_exit_status(r, &error); dbus_error_free(&error); } } if (!arg_no_block) if ((r = wait_for_jobs(bus, s)) < 0) { ret = r; goto finish; } finish: if (s) set_free_free(s); dbus_error_free(&error); return ret; } static int start_special(DBusConnection *bus, char **args, unsigned n) { int r; assert(bus); assert(args); if (arg_force && (streq(args[0], "halt") || streq(args[0], "poweroff") || streq(args[0], "reboot") || streq(args[0], "kexec") || streq(args[0], "exit"))) return daemon_reload(bus, args, n); r = start_unit(bus, args, n); if (r >= 0) warn_wall(verb_to_action(args[0])); return r; } 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 = 3; /* According to LSB: "program is not running" */ 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); dbus_message_unref(m); continue; } if (!dbus_message_get_args(reply, &error, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) { log_error("Failed to parse reply: %s", bus_error_message(&error)); 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", bus_error_message(&error)); 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") || streq(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; } static int kill_unit(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; int r = 0; DBusError error; unsigned i; assert(bus); assert(args); dbus_error_init(&error); if (!arg_kill_who) arg_kill_who = "all"; if (!arg_kill_mode) arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process"; for (i = 1; i < n; i++) { if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "KillUnit"))) { log_error("Could not allocate message."); r = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_STRING, &args[i], DBUS_TYPE_STRING, &arg_kill_who, DBUS_TYPE_STRING, &arg_kill_mode, DBUS_TYPE_INT32, &arg_signal, 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", bus_error_message(&error)); dbus_error_free(&error); r = -EIO; } dbus_message_unref(m); if (reply) 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 ExecStatusInfo { char *path; char **argv; bool ignore; usec_t start_timestamp; usec_t exit_timestamp; pid_t pid; int code; int status; LIST_FIELDS(struct ExecStatusInfo, exec); } ExecStatusInfo; static void exec_status_info_free(ExecStatusInfo *i) { assert(i); free(i->path); strv_free(i->argv); free(i); } static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) { uint64_t start_timestamp, exit_timestamp; DBusMessageIter sub2, sub3; const char*path; unsigned n; uint32_t pid; int32_t code, status; dbus_bool_t ignore; assert(i); assert(i); if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT) return -EIO; dbus_message_iter_recurse(sub, &sub2); if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0) return -EIO; if (!(i->path = strdup(path))) return -ENOMEM; if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING) return -EIO; n = 0; dbus_message_iter_recurse(&sub2, &sub3); while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) { assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING); dbus_message_iter_next(&sub3); n++; } if (!(i->argv = new0(char*, n+1))) return -ENOMEM; n = 0; 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); dbus_message_iter_next(&sub3); if (!(i->argv[n++] = strdup(s))) return -ENOMEM; } if (!dbus_message_iter_next(&sub2) || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 || bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, 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) return -EIO; i->ignore = ignore; i->start_timestamp = (usec_t) start_timestamp; i->exit_timestamp = (usec_t) exit_timestamp; i->pid = (pid_t) pid; i->code = code; i->status = status; return 0; } typedef struct UnitStatusInfo { const char *id; const char *load_state; const char *active_state; const char *sub_state; const char *description; const char *following; const char *path; const char *default_control_group; usec_t inactive_exit_timestamp; usec_t active_enter_timestamp; usec_t active_exit_timestamp; usec_t inactive_enter_timestamp; bool need_daemon_reload; /* Service */ pid_t main_pid; pid_t control_pid; const char *status_text; bool running:1; #ifdef HAVE_SYSV_COMPAT bool is_sysv:1; #endif usec_t start_timestamp; usec_t exit_timestamp; int exit_code, exit_status; /* Socket */ unsigned n_accepted; unsigned n_connections; bool accept; /* Device */ const char *sysfs_path; /* Mount, Automount */ const char *where; /* Swap */ const char *what; LIST_HEAD(ExecStatusInfo, exec); } UnitStatusInfo; static void print_status_info(UnitStatusInfo *i) { ExecStatusInfo *p; const char *on, *off, *ss; usec_t timestamp; char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1; char since2[FORMAT_TIMESTAMP_MAX], *s2; 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->following) printf("\t Follow: unit currently follows state of %s\n", i->following); if (streq_ptr(i->load_state, "failed") || streq_ptr(i->load_state, "banned")) { on = ansi_highlight(true); off = ansi_highlight(false); } else on = off = ""; if (i->path) printf("\t Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path); else printf("\t Loaded: %s%s%s\n", on, strna(i->load_state), off); ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state; if (streq_ptr(i->active_state, "failed")) { on = ansi_highlight(true); off = ansi_highlight(false); } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) { on = ansi_highlight_green(true); off = ansi_highlight_green(false); } else on = off = ""; if (ss) printf("\t Active: %s%s (%s)%s", on, strna(i->active_state), ss, off); else printf("\t Active: %s%s%s", on, strna(i->active_state), off); timestamp = (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) ? i->active_enter_timestamp : (streq_ptr(i->active_state, "inactive") || streq_ptr(i->active_state, "failed")) ? i->inactive_enter_timestamp : streq_ptr(i->active_state, "activating") ? i->inactive_exit_timestamp : i->active_exit_timestamp; s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp); s2 = format_timestamp(since2, sizeof(since2), timestamp); if (s1) printf(" since %s; %s\n", s2, s1); else if (s2) printf(" since %s\n", s2); else printf("\n"); if (i->sysfs_path) printf("\t Device: %s\n", i->sysfs_path); if (i->where) printf("\t Where: %s\n", i->where); if (i->what) printf("\t What: %s\n", i->what); if (i->accept) printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections); LIST_FOREACH(exec, p, i->exec) { char *t; /* Only show exited processes here */ if (p->code == 0) continue; t = strv_join(p->argv, " "); printf("\t Process: %u (%s, code=%s, ", p->pid, strna(t), sigchld_code_to_string(p->code)); free(t); if (p->code == CLD_EXITED) { const char *c; printf("status=%i", p->status); #ifdef HAVE_SYSV_COMPAT if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD))) #else if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD))) #endif printf("/%s", c); } else printf("signal=%s", signal_to_string(p->status)); printf(")\n"); if (i->main_pid == p->pid && i->start_timestamp == p->start_timestamp && i->exit_timestamp == p->start_timestamp) /* Let's not show this twice */ i->main_pid = 0; if (p->pid == i->control_pid) i->control_pid = 0; } if (i->main_pid > 0 || i->control_pid > 0) { printf("\t"); if (i->main_pid > 0) { printf("Main PID: %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 if (i->exit_code > 0) { printf(" (code=%s, ", sigchld_code_to_string(i->exit_code)); if (i->exit_code == CLD_EXITED) { const char *c; printf("status=%i", i->exit_status); #ifdef HAVE_SYSV_COMPAT if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD))) #else if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD))) #endif printf("/%s", c); } else printf("signal=%s", signal_to_string(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->status_text) printf("\t Status: \"%s\"\n", i->status_text); 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_by_path(i->default_control_group, "\t\t ", c); } if (i->need_daemon_reload) printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n", ansi_highlight(true), ansi_highlight(false), arg_user ? "--user" : "--system"); } 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->path = s; #ifdef HAVE_SYSV_COMPAT else if (streq(name, "SysVPath")) { i->is_sysv = true; i->path = s; } #endif 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; else if (streq(name, "Following")) i->following = s; } break; } case DBUS_TYPE_BOOLEAN: { dbus_bool_t b; dbus_message_iter_get_basic(iter, &b); if (streq(name, "Accept")) i->accept = b; else if (streq(name, "NeedDaemonReload")) i->need_daemon_reload = b; 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; else if (streq(name, "ActiveEnterTimestamp")) i->active_enter_timestamp = (usec_t) u; else if (streq(name, "InactiveEnterTimestamp")) i->inactive_enter_timestamp = (usec_t) u; else if (streq(name, "InactiveExitTimestamp")) i->inactive_exit_timestamp = (usec_t) u; else if (streq(name, "ActiveExitTimestamp")) i->active_exit_timestamp = (usec_t) u; break; } case DBUS_TYPE_ARRAY: { if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) { DBusMessageIter sub; dbus_message_iter_recurse(iter, &sub); while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) { ExecStatusInfo *info; int r; if (!(info = new0(ExecStatusInfo, 1))) return -ENOMEM; if ((r = exec_status_info_deserialize(&sub, info)) < 0) { free(info); return r; } LIST_PREPEND(ExecStatusInfo, exec, i->exec, info); dbus_message_iter_next(&sub); } } 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 && !strv_find(arg_property, name)) 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_DOUBLE: { double d; dbus_message_iter_get_basic(iter, &d); printf("%s=%g\n", name, d); 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; dbus_message_iter_recurse(iter, &sub); while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) { ExecStatusInfo info; zero(info); if (exec_status_info_deserialize(&sub, &info) >= 0) { char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX]; char *t; t = strv_join(info.argv, " "); printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n", name, strna(info.path), strna(t), yes_no(info.ignore), strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)), strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)), (unsigned) info. pid, sigchld_code_to_string(info.code), info.status, info.code == CLD_EXITED ? "" : "/", strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status))); free(t); } free(info.path); strv_free(info.argv); 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; ExecStatusInfo *p; 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", bus_error_message(&error)); 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); } r = 0; if (!show_properties) print_status_info(&info); if (!streq_ptr(info.active_state, "active") && !streq_ptr(info.active_state, "reloading")) /* According to LSB: "program not running" */ r = 3; while ((p = info.exec)) { LIST_REMOVE(ExecStatusInfo, exec, info.exec, p); exec_status_info_free(p); } 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, ret = 0; 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 */ ret = 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 (safe_atou32(args[i], &id) < 0) { /* Interpret as unit name */ if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "LoadUnit"))) { log_error("Could not allocate message."); ret = -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."); ret = -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", bus_error_message(&error)); ret = -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."); ret = -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."); ret = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", bus_error_message(&error)); if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT)) ret = 4; /* According to LSB: "program or service status is unknown" */ else ret = -EIO; goto finish; } } } else if (show_properties) { /* Interpret as job id */ if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetJob"))) { log_error("Could not allocate message."); ret = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_UINT32, &id, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); ret = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", bus_error_message(&error)); ret = -EIO; goto finish; } } else { /* Interpret as PID */ if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "GetUnitByPID"))) { log_error("Could not allocate message."); ret = -ENOMEM; goto finish; } if (!dbus_message_append_args(m, DBUS_TYPE_UINT32, &id, DBUS_TYPE_INVALID)) { log_error("Could not append arguments to message."); ret = -ENOMEM; goto finish; } if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { log_error("Failed to issue method call: %s", bus_error_message(&error)); ret = -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", bus_error_message(&error)); ret = -EIO; goto finish; } if ((r = show_one(bus, path, show_properties, &new_line)) != 0) ret = r; 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 ret; } 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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.DBus.Properties", "PropertiesChanged")) { const char *path, *interface, *property = "Id"; DBusMessageIter iter, sub; path = dbus_message_get_path(message); if (!dbus_message_get_args(message, &error, DBUS_TYPE_STRING, &interface, DBUS_TYPE_INVALID)) { log_error("Failed to parse message: %s", bus_error_message(&error)); goto finish; } if (!streq(interface, "org.freedesktop.systemd1.Job") && !streq(interface, "org.freedesktop.systemd1.Unit")) goto finish; 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", bus_error_message(&error)); 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", bus_error_message(&error)); r = -EIO; goto finish; } dbus_bus_add_match(bus, "type='signal'," "sender='org.freedesktop.systemd1'," "interface='org.freedesktop.DBus.Properties'," "member='PropertiesChanged'", &error); if (dbus_error_is_set(&error)) { log_error("Failed to add match: %s", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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 daemon_reload(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") || streq(args[0], "cancel") ? "ClearJobs" : streq(args[0], "daemon-reexec") ? "Reexecute" : streq(args[0], "reset-failed") ? "ResetFailed" : streq(args[0], "halt") ? "Halt" : streq(args[0], "poweroff") ? "PowerOff" : streq(args[0], "reboot") ? "Reboot" : streq(args[0], "kexec") ? "KExec" : streq(args[0], "exit") ? "Exit" : /* "daemon-reload" */ "Reload"; } 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 = -EADDRNOTAVAIL; goto finish; } log_error("Failed to issue method call: %s", bus_error_message(&error)); 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 reset_failed(DBusConnection *bus, char **args, unsigned n) { DBusMessage *m = NULL, *reply = NULL; unsigned i; int r; DBusError error; assert(bus); dbus_error_init(&error); if (n <= 1) return daemon_reload(bus, args, n); for (i = 1; i < n; i++) { if (!(m = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "ResetFailedUnit"))) { 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", bus_error_message(&error)); 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 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", bus_error_message(&error)); 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", bus_error_message(&error)); 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; } typedef struct { char *name; char *path; char **aliases; char **wanted_by; } InstallInfo; static Hashmap *will_install = NULL, *have_installed = NULL; static Set *remove_symlinks_to = NULL; static unsigned n_symlinks = 0; static void install_info_free(InstallInfo *i) { assert(i); free(i->name); free(i->path); strv_free(i->aliases); strv_free(i->wanted_by); free(i); } static void install_info_hashmap_free(Hashmap *m) { InstallInfo *i; while ((i = hashmap_steal_first(m))) install_info_free(i); hashmap_free(m); } static int install_info_add(const char *name) { InstallInfo *i; int r; assert(will_install); if (!unit_name_is_valid_no_type(name, true)) { log_warning("Unit name %s is not a valid unit name.", name); return -EINVAL; } if (hashmap_get(have_installed, name) || hashmap_get(will_install, name)) return 0; if (!(i = new0(InstallInfo, 1))) { r = -ENOMEM; goto fail; } if (!(i->name = strdup(name))) { r = -ENOMEM; goto fail; } if ((r = hashmap_put(will_install, i->name, i)) < 0) goto fail; return 0; fail: if (i) install_info_free(i); return r; } static int config_parse_also( const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) { char *w; size_t l; char *state; assert(filename); assert(lvalue); assert(rvalue); FOREACH_WORD_QUOTED(w, l, rvalue, state) { char *n; int r; if (!(n = strndup(w, l))) return -ENOMEM; if ((r = install_info_add(n)) < 0) { log_warning("Cannot install unit %s: %s", n, strerror(-r)); free(n); return r; } free(n); } return 0; } static int mark_symlink_for_removal(const char *p) { char *n; int r; assert(p); assert(path_is_absolute(p)); if (!remove_symlinks_to) return 0; if (!(n = strdup(p))) return -ENOMEM; path_kill_slashes(n); if ((r = set_put(remove_symlinks_to, n)) < 0) { free(n); return r == -EEXIST ? 0 : r; } return 0; } static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) { int r = 0; DIR *d; struct dirent *de; assert(fd >= 0); assert(root); assert(deleted); if (!(d = fdopendir(fd))) { close_nointr_nofail(fd); return -errno; } rewinddir(d); while ((de = readdir(d))) { bool is_dir = false, is_link = false; if (ignore_file(de->d_name)) continue; if (de->d_type == DT_LNK) is_link = true; else if (de->d_type == DT_DIR) is_dir = true; else if (de->d_type == DT_UNKNOWN) { struct stat st; if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { log_error("Failed to stat %s/%s: %m", root, de->d_name); if (r == 0) r = -errno; continue; } is_link = S_ISLNK(st.st_mode); is_dir = S_ISDIR(st.st_mode); } else continue; if (is_dir) { int nfd, q; char *p; if ((nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) { log_error("Failed to open %s/%s: %m", root, de->d_name); if (r == 0) r = -errno; continue; } if (asprintf(&p, "%s/%s", root, de->d_name) < 0) { log_error("Failed to allocate directory string."); close_nointr_nofail(nfd); r = -ENOMEM; break; } /* This will close nfd, regardless whether it succeeds or not */ q = remove_marked_symlinks_fd(nfd, config_path, p, deleted); free(p); if (r == 0) r = q; } else if (is_link) { char *p, *dest, *c; int q; if (asprintf(&p, "%s/%s", root, de->d_name) < 0) { log_error("Failed to allocate symlink string."); r = -ENOMEM; break; } if ((q = readlink_and_make_absolute(p, &dest)) < 0) { log_error("Cannot read symlink %s: %s", p, strerror(-q)); free(p); if (r == 0) r = q; continue; } if ((c = canonicalize_file_name(dest))) { /* This might fail if the destination * is already removed */ free(dest); dest = c; } path_kill_slashes(dest); if (set_get(remove_symlinks_to, dest)) { if (!arg_quiet) log_info("rm '%s'", p); if (unlink(p) < 0) { log_error("Cannot unlink symlink %s: %m", p); if (r == 0) r = -errno; } else { rmdir_parents(p, config_path); path_kill_slashes(p); if (!set_get(remove_symlinks_to, p)) { if ((r = mark_symlink_for_removal(p)) < 0) { if (r == 0) r = q; } else *deleted = true; } } } free(p); free(dest); } } closedir(d); return r; } static int remove_marked_symlinks(const char *config_path) { int fd, r = 0; bool deleted; assert(config_path); if (set_size(remove_symlinks_to) <= 0) return 0; if ((fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) return -errno; do { int q, cfd; deleted = false; if ((cfd = dup(fd)) < 0) { r = -errno; break; } /* This takes possession of cfd and closes it */ if ((q = remove_marked_symlinks_fd(cfd, config_path, config_path, &deleted)) < 0) { if (r == 0) r = q; } } while (deleted); close_nointr_nofail(fd); return r; } static int create_symlink(const char *verb, const char *old_path, const char *new_path) { int r; assert(old_path); assert(new_path); assert(verb); if (streq(verb, "enable")) { char *dest; mkdir_parents(new_path, 0755); if (symlink(old_path, new_path) >= 0) { if (!arg_quiet) log_info("ln -s '%s' '%s'", old_path, new_path); return 0; } if (errno != EEXIST) { log_error("Cannot link %s to %s: %m", old_path, new_path); return -errno; } if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) { if (errno == EINVAL) { log_error("Cannot link %s to %s, file exists already and is not a symlink.", old_path, new_path); return -EEXIST; } log_error("readlink() failed: %s", strerror(-r)); return r; } if (streq(dest, old_path)) { free(dest); return 0; } if (!arg_force) { log_error("Cannot link %s to %s, symlink exists already and points to %s.", old_path, new_path, dest); free(dest); return -EEXIST; } free(dest); unlink(new_path); if (!arg_quiet) log_info("ln -s '%s' '%s'", old_path, new_path); if (symlink(old_path, new_path) >= 0) return 0; log_error("Cannot link %s to %s: %m", old_path, new_path); return -errno; } else if (streq(verb, "disable")) { char *dest; if ((r = mark_symlink_for_removal(old_path)) < 0) return r; if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) { if (errno == ENOENT) return 0; if (errno == EINVAL) { log_warning("File %s not a symlink, ignoring.", old_path); return 0; } log_error("readlink() failed: %s", strerror(-r)); return r; } if (!streq(dest, old_path)) { log_warning("File %s not a symlink to %s but points to %s, ignoring.", new_path, old_path, dest); free(dest); return 0; } free(dest); if ((r = mark_symlink_for_removal(new_path)) < 0) return r; if (!arg_quiet) log_info("rm '%s'", new_path); if (unlink(new_path) >= 0) return 0; log_error("Cannot unlink %s: %m", new_path); return -errno; } else if (streq(verb, "is-enabled")) { char *dest; if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) { if (errno == ENOENT || errno == EINVAL) return 0; log_error("readlink() failed: %s", strerror(-r)); return r; } if (streq(dest, old_path)) { free(dest); return 1; } return 0; } assert_not_reached("Unknown action."); } static int install_info_symlink_alias(const char *verb, InstallInfo *i, const char *config_path) { char **s; char *alias_path = NULL; int r; assert(verb); assert(i); assert(config_path); STRV_FOREACH(s, i->aliases) { free(alias_path); if (!(alias_path = path_make_absolute(*s, config_path))) { log_error("Out of memory"); r = -ENOMEM; goto finish; } if ((r = create_symlink(verb, i->path, alias_path)) != 0) goto finish; if (streq(verb, "disable")) rmdir_parents(alias_path, config_path); } r = 0; finish: free(alias_path); return r; } static int install_info_symlink_wants(const char *verb, InstallInfo *i, const char *config_path) { char **s; char *alias_path = NULL; int r; assert(verb); assert(i); assert(config_path); STRV_FOREACH(s, i->wanted_by) { if (!unit_name_is_valid_no_type(*s, true)) { log_error("Invalid name %s.", *s); r = -EINVAL; goto finish; } free(alias_path); alias_path = NULL; if (asprintf(&alias_path, "%s/%s.wants/%s", config_path, *s, i->name) < 0) { log_error("Out of memory"); r = -ENOMEM; goto finish; } if ((r = create_symlink(verb, i->path, alias_path)) != 0) goto finish; if (streq(verb, "disable")) rmdir_parents(alias_path, config_path); } r = 0; finish: free(alias_path); return r; } static int install_info_apply(const char *verb, LookupPaths *paths, InstallInfo *i, const char *config_path) { const ConfigItem items[] = { { "Alias", config_parse_strv, &i->aliases, "Install" }, { "WantedBy", config_parse_strv, &i->wanted_by, "Install" }, { "Also", config_parse_also, NULL, "Install" }, { NULL, NULL, NULL, NULL } }; char **p; char *filename = NULL; FILE *f = NULL; int r; assert(paths); assert(i); STRV_FOREACH(p, paths->unit_path) { int fd; if (!(filename = path_make_absolute(i->name, *p))) { log_error("Out of memory"); return -ENOMEM; } /* Ensure that we don't follow symlinks */ if ((fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NOCTTY)) >= 0) if ((f = fdopen(fd, "re"))) break; if (errno == ELOOP) { log_error("Refusing to operate on symlinks, please pass unit names or absolute paths to unit files."); free(filename); return -errno; } if (errno != ENOENT) { log_error("Failed to open %s: %m", filename); free(filename); return -errno; } free(filename); filename = NULL; } if (!f) { log_error("Couldn't find %s.", i->name); return -ENOENT; } i->path = filename; if ((r = config_parse(filename, f, NULL, items, true, i)) < 0) { fclose(f); return r; } n_symlinks += strv_length(i->aliases); n_symlinks += strv_length(i->wanted_by); fclose(f); if ((r = install_info_symlink_alias(verb, i, config_path)) != 0) return r; if ((r = install_info_symlink_wants(verb, i, config_path)) != 0) return r; if ((r = mark_symlink_for_removal(filename)) < 0) return r; if ((r = remove_marked_symlinks(config_path)) < 0) return r; return 0; } static char *get_config_path(void) { if (arg_user && arg_global) return strdup(USER_CONFIG_UNIT_PATH); if (arg_user) { char *p; if (user_config_home(&p) < 0) return NULL; return p; } return strdup(SYSTEM_CONFIG_UNIT_PATH); } static int enable_unit(DBusConnection *bus, char **args, unsigned n) { DBusError error; int r; LookupPaths paths; char *config_path = NULL; unsigned j; InstallInfo *i; const char *verb = args[0]; dbus_error_init(&error); zero(paths); if ((r = lookup_paths_init(&paths, arg_user ? MANAGER_USER : MANAGER_SYSTEM)) < 0) { log_error("Failed to determine lookup paths: %s", strerror(-r)); goto finish; } if (!(config_path = get_config_path())) { log_error("Failed to determine config path"); r = -ENOMEM; goto finish; } will_install = hashmap_new(string_hash_func, string_compare_func); have_installed = hashmap_new(string_hash_func, string_compare_func); if (!will_install || !have_installed) { log_error("Failed to allocate unit sets."); r = -ENOMEM; goto finish; } if (!arg_defaults && streq(verb, "disable")) if (!(remove_symlinks_to = set_new(string_hash_func, string_compare_func))) { log_error("Failed to allocate symlink sets."); r = -ENOMEM; goto finish; } for (j = 1; j < n; j++) if ((r = install_info_add(args[j])) < 0) { log_warning("Cannot install unit %s: %s", args[j], strerror(-r)); goto finish; } while ((i = hashmap_first(will_install))) { int q; assert_se(hashmap_move_one(have_installed, will_install, i->name) == 0); if ((q = install_info_apply(verb, &paths, i, config_path)) != 0) { if (q < 0) { if (r == 0) r = q; goto finish; } /* In test mode and found something */ r = 1; break; } } if (streq(verb, "is-enabled")) r = r > 0 ? 0 : -ENOENT; else { if (n_symlinks <= 0) log_warning("Unit files contain no applicable installation information. Ignoring."); if (bus && /* Don't try to reload anything if the user asked us to not do this */ !arg_no_reload && /* Don't try to reload anything when updating a unit globally */ !arg_global && /* Don't try to reload anything if we are called for system changes but the system wasn't booted with systemd */ (arg_user || sd_booted() > 0) && /* Don't try to reload anything if we are running in a chroot environment */ (arg_user || running_in_chroot() <= 0) ) { int q; if ((q = daemon_reload(bus, args, n)) < 0) r = q; } } finish: install_info_hashmap_free(will_install); install_info_hashmap_free(have_installed); set_free_free(remove_symlinks_to); lookup_paths_free(&paths); free(config_path); return r; } static int systemctl_help(void) { printf("%s [OPTIONS...] {COMMAND} ...\n\n" "Send control commands to or query the systemd manager.\n\n" " -h --help Show this help\n" " --version Show package version\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" " --full Don't ellipsize unit names on output\n" " --fail When queueing a new job, fail if conflicting jobs are\n" " pending\n" " -q --quiet Suppress output\n" " --no-block Do not wait until operation finished\n" " --system Connect to system manager\n" " --user Connect to user service manager\n" " --order When generating graph for dot, show only order\n" " --require When generating graph for dot, show only requirement\n" " --no-wall Don't send wall message before halt/power-off/reboot\n" " --global Enable/disable unit files globally\n" " --no-reload When enabling/disabling unit files, don't reload daemon\n" " configuration\n" " --no-ask-password\n" " Do not ask for system passwords\n" " --kill-mode=MODE How to send signal\n" " --kill-who=WHO Who to send signal to\n" " -s --signal=SIGNAL Which signal to send\n" " -f --force When enabling unit files, override existing symlinks\n" " When shutting down, execute action immediately\n" " --defaults When disabling unit files, remove default symlinks only\n\n" "Commands:\n" " list-units List units\n" " start [NAME...] Start (activate) one or more units\n" " stop [NAME...] Stop (deactivate) one or more units\n" " reload [NAME...] Reload one or more units\n" " restart [NAME...] Start or restart one or more units\n" " try-restart [NAME...] Restart one or more units if active\n" " reload-or-restart [NAME...] Reload one or more units is possible,\n" " otherwise start or restart\n" " reload-or-try-restart [NAME...] Reload one or more units is possible,\n" " otherwise restart if active\n" " isolate [NAME] Start one unit and stop all others\n" " kill [NAME...] Send signal to processes of a unit\n" " is-active [NAME...] Check whether units are active\n" " status [NAME...|PID...] Show runtime status of one or more units\n" " show [NAME...|JOB...] Show properties of one or more\n" " units/jobs or the manager\n" " reset-failed [NAME...] Reset failed state for all, one, or more\n" " units\n" " enable [NAME...] Enable one or more unit files\n" " disable [NAME...] Disable one or more unit files\n" " is-enabled [NAME...] Check whether unit files are enabled\n" " load [NAME...] Load one or more units\n" " list-jobs List jobs\n" " cancel [JOB...] Cancel all, one, or more jobs\n" " monitor Monitor unit/job changes\n" " dump Dump server status\n" " dot Dump dependency graph for dot(1)\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" " 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" " default Enter system default mode\n" " rescue Enter system rescue mode\n" " emergency Enter system emergency mode\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" " kexec Shut down and reboot the system with kexec\n" " exit Ask for user instance termination\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...] [TIME] [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" " -c Cancel a pending shutdown\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_FAIL = 0x100, ARG_VERSION, ARG_USER, ARG_SYSTEM, ARG_GLOBAL, ARG_NO_BLOCK, ARG_NO_WALL, ARG_ORDER, ARG_REQUIRE, ARG_FULL, ARG_NO_RELOAD, ARG_DEFAULTS, ARG_KILL_MODE, ARG_KILL_WHO, ARG_NO_ASK_PASSWORD }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "type", required_argument, NULL, 't' }, { "property", required_argument, NULL, 'p' }, { "all", no_argument, NULL, 'a' }, { "full", no_argument, NULL, ARG_FULL }, { "fail", no_argument, NULL, ARG_FAIL }, { "user", no_argument, NULL, ARG_USER }, { "system", no_argument, NULL, ARG_SYSTEM }, { "global", no_argument, NULL, ARG_GLOBAL }, { "no-block", no_argument, NULL, ARG_NO_BLOCK }, { "no-wall", no_argument, NULL, ARG_NO_WALL }, { "quiet", no_argument, NULL, 'q' }, { "order", no_argument, NULL, ARG_ORDER }, { "require", no_argument, NULL, ARG_REQUIRE }, { "force", no_argument, NULL, 'f' }, { "no-reload", no_argument, NULL, ARG_NO_RELOAD }, { "defaults", no_argument, NULL, ARG_DEFAULTS }, { "kill-mode", required_argument, NULL, ARG_KILL_MODE }, { "kill-who", required_argument, NULL, ARG_KILL_WHO }, { "signal", required_argument, NULL, 's' }, { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, { NULL, 0, NULL, 0 } }; int c; assert(argc >= 0); assert(argv); /* Only when running as systemctl we ask for passwords */ arg_ask_password = true; while ((c = getopt_long(argc, argv, "ht:p:aqfs:", options, NULL)) >= 0) { switch (c) { case 'h': systemctl_help(); return 0; case ARG_VERSION: puts(PACKAGE_STRING); puts(DISTRIBUTION); puts(SYSTEMD_FEATURES); return 0; case 't': arg_type = optarg; break; case 'p': { char **l; if (!(l = strv_append(arg_property, optarg))) return -ENOMEM; strv_free(arg_property); arg_property = l; /* 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_FAIL: arg_fail = true; break; case ARG_USER: arg_user = true; break; case ARG_SYSTEM: arg_user = false; break; case ARG_NO_BLOCK: arg_no_block = true; break; case ARG_NO_WALL: arg_no_wall = true; break; case ARG_ORDER: arg_dot = DOT_ORDER; break; case ARG_REQUIRE: arg_dot = DOT_REQUIRE; break; case ARG_FULL: arg_full = true; break; case 'q': arg_quiet = true; break; case 'f': arg_force = true; break; case ARG_NO_RELOAD: arg_no_reload = true; break; case ARG_GLOBAL: arg_global = true; arg_user = true; break; case ARG_DEFAULTS: arg_defaults = true; break; case ARG_KILL_WHO: arg_kill_who = optarg; break; case ARG_KILL_MODE: arg_kill_mode = optarg; break; case 's': if ((arg_signal = signal_from_string_try_harder(optarg)) < 0) { log_error("Failed to parse signal string %s.", optarg); return -EINVAL; } break; case ARG_NO_ASK_PASSWORD: arg_ask_password = false; 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': if (arg_action != ACTION_REBOOT) 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 parse_time_spec(const char *t, usec_t *_u) { assert(t); assert(_u); if (streq(t, "now")) *_u = 0; else if (t[0] == '+') { uint64_t u; if (safe_atou64(t + 1, &u) < 0) return -EINVAL; *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u; } else { char *e = NULL; long hour, minute; struct tm tm; time_t s; usec_t n; errno = 0; hour = strtol(t, &e, 10); if (errno != 0 || *e != ':' || hour < 0 || hour > 23) return -EINVAL; minute = strtol(e+1, &e, 10); if (errno != 0 || *e != 0 || minute < 0 || minute > 59) return -EINVAL; n = now(CLOCK_REALTIME); s = (time_t) (n / USEC_PER_SEC); zero(tm); assert_se(localtime_r(&s, &tm)); tm.tm_hour = (int) hour; tm.tm_min = (int) minute; tm.tm_sec = 0; assert_se(s = mktime(&tm)); *_u = (usec_t) s * USEC_PER_SEC; while (*_u <= n) *_u += USEC_PER_DAY; } return 0; } 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, r; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "HPrhkt:afFc", 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 'c': arg_action = ACTION_CANCEL_SHUTDOWN; break; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } if (argc > optind) { if ((r = parse_time_spec(argv[optind], &arg_when)) < 0) { log_error("Failed to parse time specification: %s", argv[optind]); return r; } } else arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE; /* We skip 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")) { if (sd_booted() > 0) { arg_action = ACTION_INVALID; return telinit_parse_argv(argc, argv); } else { /* Hmm, so some other init system is * running, we need to forward this * request to it. For now we simply * guess that it is Upstart. */ execv("/lib/upstart/telinit", argv); log_error("Couldn't find an alternative telinit implementation to spawn."); return -EIO; } } 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_private("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", bus_error_message(&error)); 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 = -EADDRNOTAVAIL; goto finish; } log_error("Failed to issue method call: %s", bus_error_message(&error)); r = -EIO; goto finish; } r = 0; finish: if (m) dbus_message_unref(m); if (reply) dbus_message_unref(reply); if (bus) { dbus_connection_flush(bus); dbus_connection_close(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[], DBusError *error) { 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, daemon_reload }, { "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 }, { "try-restart", MORE, 2, start_unit }, { "reload-or-restart", MORE, 2, start_unit }, { "reload-or-try-restart", MORE, 2, start_unit }, { "force-reload", MORE, 2, start_unit }, /* For compatibility with SysV */ { "condrestart", MORE, 2, start_unit }, /* For compatibility with RH */ { "isolate", EQUAL, 2, start_unit }, { "kill", MORE, 2, kill_unit }, { "is-active", MORE, 2, check_unit }, { "check", MORE, 2, check_unit }, { "show", MORE, 1, show }, { "status", MORE, 2, show }, { "monitor", EQUAL, 1, monitor }, { "dump", EQUAL, 1, dump }, { "dot", EQUAL, 1, dot }, { "snapshot", LESS, 2, snapshot }, { "delete", MORE, 2, delete_snapshot }, { "daemon-reload", EQUAL, 1, daemon_reload }, { "daemon-reexec", EQUAL, 1, daemon_reload }, { "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 }, { "kexec", EQUAL, 1, start_special }, { "default", EQUAL, 1, start_special }, { "rescue", EQUAL, 1, start_special }, { "emergency", EQUAL, 1, start_special }, { "exit", EQUAL, 1, start_special }, { "reset-failed", MORE, 1, reset_failed }, { "enable", MORE, 2, enable_unit }, { "disable", MORE, 2, enable_unit }, { "is-enabled", MORE, 2, enable_unit } }; int left; unsigned i; assert(argc >= 0); assert(argv); assert(error); 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."); } /* Require a bus connection for all operations but * enable/disable */ if (!streq(verbs[i].verb, "enable") && !streq(verbs[i].verb, "disable") && !bus) { log_error("Failed to get D-Bus connection: %s", error->message); return -EIO; } return verbs[i].dispatch(bus, argv + optind, left); } static int send_shutdownd(usec_t t, char mode, bool warn, const char *message) { int fd = -1; struct msghdr msghdr; struct iovec iovec; union sockaddr_union sockaddr; struct shutdownd_command c; zero(c); c.elapse = t; c.mode = mode; c.warn_wall = warn; if (message) strncpy(c.wall_message, message, sizeof(c.wall_message)); if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) return -errno; zero(sockaddr); sockaddr.sa.sa_family = AF_UNIX; sockaddr.un.sun_path[0] = 0; strncpy(sockaddr.un.sun_path+1, "/org/freedesktop/systemd1/shutdownd", sizeof(sockaddr.un.sun_path)-1); zero(iovec); iovec.iov_base = (char*) &c; iovec.iov_len = sizeof(c); zero(msghdr); msghdr.msg_name = &sockaddr; msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + 1 + sizeof("/org/freedesktop/systemd1/shutdownd") - 1; msghdr.msg_iov = &iovec; msghdr.msg_iovlen = 1; if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) { close_nointr_nofail(fd); return -errno; } close_nointr_nofail(fd); return 0; } static int reload_with_fallback(DBusConnection *bus) { if (bus) { /* First, try systemd via D-Bus. */ if (daemon_reload(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) { if (bus) { /* First, try systemd via D-Bus. */ if (start_unit(bus, NULL, 0) >= 0) goto done; } /* Hmm, talking to systemd via D-Bus didn't work. Then * let's try to talk to Upstart via D-Bus. */ if (talk_upstart() > 0) goto done; /* Nothing else worked, so let's try * /dev/initctl */ if (talk_initctl() > 0) goto done; log_error("Failed to talk to init daemon."); return -EIO; done: warn_wall(arg_action); return 0; } static int halt_main(DBusConnection *bus) { int r; if (geteuid() != 0) { log_error("Must be root."); return -EPERM; } if (arg_when > 0) { char *m; char date[FORMAT_TIMESTAMP_MAX]; m = strv_join(arg_wall, " "); r = send_shutdownd(arg_when, arg_action == ACTION_HALT ? 'H' : arg_action == ACTION_POWEROFF ? 'P' : 'r', !arg_no_wall, m); free(m); if (r < 0) log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r)); else { log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.", format_timestamp(date, sizeof(date), arg_when)); return 0; } } if (!arg_dry && !arg_immediate) return start_with_fallback(bus); if (!arg_no_wtmp) { if (sd_booted() > 0) log_debug("Not writing utmp record, assuming that systemd-update-utmp is used."); else 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\n"); 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 = EXIT_FAILURE; DBusConnection *bus = NULL; DBusError error; dbus_error_init(&error); log_parse_environment(); log_open(); if ((r = parse_argv(argc, argv)) < 0) goto finish; else if (r == 0) { retval = EXIT_SUCCESS; goto finish; } /* /sbin/runlevel doesn't need to communicate via D-Bus, so * let's shortcut this */ if (arg_action == ACTION_RUNLEVEL) { r = runlevel_main(); retval = r < 0 ? EXIT_FAILURE : r; goto finish; } bus_connect(arg_user ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &bus, &private_bus, &error); switch (arg_action) { case ACTION_SYSTEMCTL: r = systemctl_main(bus, argc, argv, &error); break; case ACTION_HALT: case ACTION_POWEROFF: case ACTION_REBOOT: r = halt_main(bus); break; case ACTION_RUNLEVEL2: case ACTION_RUNLEVEL3: case ACTION_RUNLEVEL4: case ACTION_RUNLEVEL5: case ACTION_RESCUE: case ACTION_EMERGENCY: case ACTION_DEFAULT: r = start_with_fallback(bus); break; case ACTION_RELOAD: case ACTION_REEXEC: r = reload_with_fallback(bus); break; case ACTION_CANCEL_SHUTDOWN: r = send_shutdownd(0, 0, false, NULL); break; case ACTION_INVALID: case ACTION_RUNLEVEL: default: assert_not_reached("Unknown action"); } retval = r < 0 ? EXIT_FAILURE : r; finish: if (bus) { dbus_connection_flush(bus); dbus_connection_close(bus); dbus_connection_unref(bus); } dbus_error_free(&error); dbus_shutdown(); strv_free(arg_property); return retval; }