X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fsystemctl.c;h=6a7a9bdd6df3ffc893dcc314202ef418dbe3bb13;hp=35ca082ab480bfa3f20ead086ce789e1be55aa08;hb=442b90946ac317da602aef916a7bac29437368b2;hpb=5b6319dceedd81f3f1ce7eb70ea5defaef43bcec
diff --git a/src/systemctl.c b/src/systemctl.c
index 35ca082ab..6a7a9bdd6 100644
--- a/src/systemctl.c
+++ b/src/systemctl.c
@@ -19,6 +19,7 @@
along with systemd; If not, see .
***/
+#include
#include
#include
#include
@@ -27,6 +28,7 @@
#include
#include
#include
+#include
#include
@@ -34,15 +36,62 @@
#include "util.h"
#include "macro.h"
#include "set.h"
+#include "utmp-wtmp.h"
+#include "special.h"
+#include "initreq.h"
+#include "strv.h"
static const char *arg_type = NULL;
static bool arg_all = false;
static bool arg_replace = false;
static bool arg_session = false;
static bool arg_block = false;
+static bool arg_immediate = false;
+static bool arg_no_wtmp = false;
+static bool arg_no_sync = false;
+static bool arg_no_wall = false;
+static bool arg_dry = false;
+static char **arg_wall = NULL;
+enum action {
+ ACTION_INVALID,
+ ACTION_SYSTEMCTL,
+ ACTION_HALT,
+ ACTION_POWEROFF,
+ ACTION_REBOOT,
+ ACTION_RUNLEVEL2,
+ ACTION_RUNLEVEL3,
+ ACTION_RUNLEVEL4,
+ ACTION_RUNLEVEL5,
+ ACTION_RESCUE,
+ ACTION_EMERGENCY,
+ ACTION_DEFAULT,
+ ACTION_RELOAD,
+ ACTION_REEXEC,
+ ACTION_RUNLEVEL,
+ _ACTION_MAX
+} arg_action = ACTION_SYSTEMCTL;
+
+static bool error_is_no_service(DBusError *error) {
+
+ assert(error);
+
+ if (!dbus_error_is_set(error))
+ return false;
+
+ if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
+ return true;
+
+ if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
+ return true;
+
+ return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
+}
static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
+ assert(iter);
+ assert(data);
+
if (dbus_message_iter_get_arg_type(iter) != type)
return -EIO;
@@ -76,6 +125,42 @@ static int columns(void) {
parsed_columns = 80;
return parsed_columns;
+
+}
+
+static void warn_wall(enum action action) {
+ static const char *table[_ACTION_MAX] = {
+ [ACTION_HALT] = "The system is going down for system halt NOW!",
+ [ACTION_REBOOT] = "The system is going down for reboot NOW!",
+ [ACTION_POWEROFF] = "The system is going down for power-off NOW!",
+ [ACTION_RESCUE] = "The system is going down to rescue mode NOW!",
+ [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
+ };
+
+ if (arg_no_wall)
+ return;
+
+ if (arg_wall) {
+ char *p;
+
+ if (!(p = strv_join(arg_wall, " "))) {
+ log_error("Failed to join strings.");
+ return;
+ }
+
+ if (*p) {
+ utmp_wall(p);
+ free(p);
+ return;
+ }
+
+ free(p);
+ }
+
+ if (!table[action])
+ return;
+
+ utmp_wall(table[action]);
}
static int list_units(DBusConnection *bus, char **args, unsigned n) {
@@ -87,6 +172,8 @@ static int list_units(DBusConnection *bus, char **args, unsigned n) {
dbus_error_init(&error);
+ assert(bus);
+
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
@@ -195,6 +282,8 @@ static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
dbus_error_init(&error);
+ assert(bus);
+
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
@@ -274,6 +363,9 @@ static int load_unit(DBusConnection *bus, char **args, unsigned n) {
dbus_error_init(&error);
+ assert(bus);
+ assert(args);
+
for (i = 1; i < n; i++) {
if (!(m = dbus_message_new_method_call(
@@ -328,6 +420,9 @@ static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
dbus_error_init(&error);
+ assert(bus);
+ assert(args);
+
for (i = 1; i < n; i++) {
unsigned id;
const char *path;
@@ -526,107 +621,86 @@ finish:
return r;
}
-static int start_unit(DBusConnection *bus, char **args, unsigned n) {
+static int start_unit_one(
+ DBusConnection *bus,
+ const char *method,
+ const char *name,
+ const char *mode,
+ Set *s) {
+
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
- unsigned i;
- const char *method, *mode;
- char *p = NULL;
- Set *s = NULL;
+
+ assert(bus);
+ assert(method);
+ assert(name);
+ assert(mode);
+ assert(!arg_block || s);
dbus_error_init(&error);
- method =
- streq(args[0], "start") ? "StartUnit" :
- streq(args[0], "stop") ? "StopUnit" :
- streq(args[0], "reload") ? "ReloadUnit" :
- "RestartUnit";
+ 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;
+ }
- mode = arg_replace ? "replace" : "fail";
+ if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- if (arg_block) {
- if ((r = enable_wait_for_jobs(bus)) < 0) {
- log_error("Could not watch jobs: %s", strerror(-r));
+ if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
+ /* There's always a fallback possible for
+ * legacy actions. */
+ r = 0;
goto finish;
}
+
+ log_error("Failed to issue method call: %s", error.message);
+ r = -EIO;
+ goto finish;
}
- for (i = 1; i < n; i++) {
+ if (arg_block) {
+ const char *path;
+ char *p;
- 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;
+ if (!dbus_message_get_args(reply, &error,
+ DBUS_TYPE_OBJECT_PATH, &path,
+ DBUS_TYPE_INVALID)) {
+ log_error("Failed to parse reply: %s", error.message);
+ r = -EIO;
goto finish;
}
- if (!dbus_message_append_args(m,
- DBUS_TYPE_STRING, &args[i],
- DBUS_TYPE_STRING, &mode,
- DBUS_TYPE_INVALID)) {
- log_error("Could not append arguments to message.");
+ if (!(p = strdup(path))) {
+ log_error("Failed to duplicate path.");
r = -ENOMEM;
goto finish;
}
- if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- log_error("Failed to issue method call: %s", error.message);
- r = -EIO;
+ if ((r = set_put(s, p)) < 0) {
+ free(p);
+ log_error("Failed to add path to set.");
goto finish;
}
-
- if (arg_block) {
- const char *path;
-
- if (!dbus_message_get_args(reply, &error,
- DBUS_TYPE_OBJECT_PATH, &path,
- DBUS_TYPE_INVALID)) {
- log_error("Failed to parse reply: %s", error.message);
- r = -EIO;
- goto finish;
- }
-
- if (!s)
- if (!(s = set_new(string_hash_func, string_compare_func))) {
- log_error("Failed to allocate set.");
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(p = strdup(path))) {
- log_error("Failed to duplicate path.");
- r = -ENOMEM;
- goto finish;
- }
-
- if ((r = set_put(s, p)) < 0) {
- log_error("Failed to add path to set.");
- goto finish;
- }
- p = NULL;
- }
-
- dbus_message_unref(m);
- dbus_message_unref(reply);
-
- m = reply = NULL;
}
- if (arg_block)
- r = wait_for_jobs(bus, s);
- else
- r = 0;
+ r = 1;
finish:
- free(p);
-
- if (s)
- set_free_free(s);
-
if (m)
dbus_message_unref(m);
@@ -638,56 +712,76 @@ finish:
return r;
}
-static int isolate_unit(DBusConnection *bus, char **args, unsigned n) {
- DBusMessage *m = NULL, *reply = NULL;
- DBusError error;
+static enum action verb_to_action(const char *verb) {
+ if (streq(verb, "halt"))
+ return ACTION_HALT;
+ else if (streq(verb, "poweroff"))
+ return ACTION_POWEROFF;
+ else if (streq(verb, "reboot"))
+ return ACTION_REBOOT;
+ else if (streq(verb, "rescue"))
+ return ACTION_RESCUE;
+ else if (streq(verb, "emergency"))
+ return ACTION_EMERGENCY;
+ else if (streq(verb, "default"))
+ return ACTION_DEFAULT;
+ else
+ return ACTION_INVALID;
+}
+
+static int start_unit(DBusConnection *bus, char **args, unsigned n) {
+
+ static const char * const table[_ACTION_MAX] = {
+ [ACTION_HALT] = SPECIAL_HALT_TARGET,
+ [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
+ [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
+ [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
+ [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
+ [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
+ [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
+ [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
+ [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_SERVICE,
+ [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
+ };
+
int r;
- const char *mode = "isolate";
- char *p = NULL;
+ unsigned i;
+ const char *method, *mode, *one_name;
Set *s = NULL;
- dbus_error_init(&error);
+ assert(bus);
- if (arg_block) {
- if ((r = enable_wait_for_jobs(bus)) < 0) {
- log_error("Could not watch jobs: %s", strerror(-r));
- goto finish;
- }
- }
+ if (arg_action == ACTION_SYSTEMCTL) {
+ method =
+ streq(args[0], "stop") ? "StopUnit" :
+ streq(args[0], "reload") ? "ReloadUnit" :
+ streq(args[0], "restart") ? "RestartUnit" :
+ "StartUnit";
- if (!(m = dbus_message_new_method_call(
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "StartUnit"))) {
- log_error("Could not allocate message.");
- r = -ENOMEM;
- goto finish;
- }
+ mode =
+ (streq(args[0], "isolate") ||
+ streq(args[0], "rescue") ||
+ streq(args[0], "emergency")) ? "isolate" :
+ arg_replace ? "replace" :
+ "fail";
- if (!dbus_message_append_args(m,
- DBUS_TYPE_STRING, &args[1],
- DBUS_TYPE_STRING, &mode,
- DBUS_TYPE_INVALID)) {
- log_error("Could not append arguments to message.");
- r = -ENOMEM;
- goto finish;
- }
+ one_name = table[verb_to_action(args[0])];
- if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- log_error("Failed to issue method call: %s", error.message);
- r = -EIO;
- goto finish;
+ } else {
+ assert(arg_action < ELEMENTSOF(table));
+ assert(table[arg_action]);
+
+ method = "StartUnit";
+
+ mode = (arg_action == ACTION_EMERGENCY ||
+ arg_action == ACTION_RESCUE) ? "isolate" : "replace";
+
+ one_name = table[arg_action];
}
if (arg_block) {
- const char *path;
-
- if (!dbus_message_get_args(reply, &error,
- DBUS_TYPE_OBJECT_PATH, &path,
- DBUS_TYPE_INVALID)) {
- log_error("Failed to parse reply: %s", error.message);
- r = -EIO;
+ if ((r = enable_wait_for_jobs(bus)) < 0) {
+ log_error("Could not watch jobs: %s", strerror(-r));
goto finish;
}
@@ -696,39 +790,36 @@ static int isolate_unit(DBusConnection *bus, char **args, unsigned n) {
r = -ENOMEM;
goto finish;
}
+ }
- if (!(p = strdup(path))) {
- log_error("Failed to duplicate path.");
- r = -ENOMEM;
- goto finish;
- }
+ r = 0;
- if ((r = set_put(s, p)) < 0) {
- log_error("Failed to add path to set.");
+ if (one_name) {
+ if ((r = start_unit_one(bus, method, one_name, mode, s)) <= 0)
goto finish;
- }
- p = NULL;
+ } else {
+ for (i = 1; i < n; i++)
+ if ((r = start_unit_one(bus, method, args[i], mode, s)) < 0)
+ goto finish;
+ }
+ if (arg_block)
r = wait_for_jobs(bus, s);
- } else
- r = 0;
-
finish:
- free(p);
-
if (s)
set_free_free(s);
- if (m)
- dbus_message_unref(m);
+ return r;
+}
- if (reply)
- dbus_message_unref(reply);
+static int start_special(DBusConnection *bus, char **args, unsigned n) {
+ assert(bus);
+ assert(args);
- dbus_error_free(&error);
+ warn_wall(verb_to_action(args[0]));
- return r;
+ return start_unit(bus, args, n);
}
static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
@@ -1110,11 +1201,19 @@ static int clear_jobs(DBusConnection *bus, char **args, unsigned n) {
dbus_error_init(&error);
- method =
- streq(args[0], "clear-jobs") ? "ClearJobs" :
- streq(args[0], "daemon-reload") ? "Reload" :
- streq(args[0], "daemon-reexec") ? "Reexecute" :
- "Exit";
+ if (arg_action == ACTION_RELOAD)
+ method = "Reload";
+ else if (arg_action == ACTION_REEXEC)
+ method = "Reexecute";
+ else {
+ assert(arg_action == ACTION_SYSTEMCTL);
+
+ method =
+ streq(args[0], "clear-jobs") ? "ClearJobs" :
+ streq(args[0], "daemon-reload") ? "Reload" :
+ streq(args[0], "daemon-reexec") ? "Reexecute" :
+ "Exit";
+ }
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
@@ -1126,12 +1225,20 @@ static int clear_jobs(DBusConnection *bus, char **args, unsigned n) {
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
+
+ if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
+ /* There's always a fallback possible for
+ * legacy actions. */
+ r = 0;
+ goto finish;
+ }
+
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
- r = 0;
+ r = 1;
finish:
if (m)
@@ -1292,16 +1399,18 @@ finish:
return r;
}
-static int help(void) {
+static int systemctl_help(void) {
printf("%s [options]\n\n"
+ "Send control commands to the init daemon.\n\n"
" -h --help Show this help\n"
" -t --type=TYPE List only units of a particular type\n"
" -a --all Show all units, including dead ones\n"
" --replace When installing a new job, replace existing conflicting ones\n"
" --system Connect to system bus\n"
" --session Connect to session bus\n"
- " --block Wait until operation finished\n\n"
+ " --block Wait until operation finished\n"
+ " --no-wall Don't send wall message before reboot/halt/power-off\n\n"
"Commands:\n"
" list-units List units\n"
" list-jobs List jobs\n"
@@ -1316,24 +1425,96 @@ static int help(void) {
" monitor Monitor unit/job changes\n"
" dump Dump server status\n"
" snapshot [NAME] Create a snapshot\n"
- " daemon-reload Reload daemon configuration\n"
- " daemon-reexecute Reexecute daemon\n"
- " daemon-exit Ask the daemon to quit\n"
+ " daemon-reload Reload init daemon configuration\n"
+ " daemon-reexecute Reexecute init daemon\n"
+ " daemon-exit Ask the init daemon to quit\n"
" show-environment Dump environment\n"
" set-environment [NAME=VALUE...] Set one or more environment variables\n"
- " unset-environment [NAME...] Unset one or more environment variables\n",
+ " unset-environment [NAME...] Unset one or more environment variables\n"
+ " halt Shut down and halt the system\n"
+ " reboot Shut down and reboot the system\n"
+ " poweroff Shut down and power off the system\n"
+ " default Enter default mode\n"
+ " rescue Enter rescue mode\n"
+ " emergency Enter emergency mode\n",
program_invocation_short_name);
return 0;
}
-static int parse_argv(int argc, char *argv[]) {
+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 reboot/halt/power-off\n"
+ " -w --wtmp-only Don't reboot/halt/power-off, just write wtmp record\n"
+ " -d --no-wtmp Don't write wtmp record\n"
+ " -n --no-sync Don't sync before reboot/halt/power-off\n"
+ " --no-wall Don't send wall message before reboot/halt/power-off\n",
+ program_invocation_short_name,
+ arg_action == ACTION_REBOOT ? "Reboot" :
+ arg_action == ACTION_POWEROFF ? "Power off" :
+ "Halt");
+
+ return 0;
+}
+
+static int shutdown_help(void) {
+
+ printf("%s [options] [now] [WALL...]\n\n"
+ "Shut down the system.\n\n"
+ " --help Show this help\n"
+ " -H --halt Halt the machine\n"
+ " -P --poweroff Power-off the machine\n"
+ " -r --reboot Reboot the machine\n"
+ " -h Equivalent to --poweroff, overriden by --halt\n"
+ " -k Don't reboot/halt/power-off, just send warnings\n"
+ " --no-wall Don't send wall message before reboot/halt/power-off\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int telinit_help(void) {
+
+ printf("%s [options]\n\n"
+ "Send control commands to the init daemon.\n\n"
+ " --help Show this help\n"
+ " --no-wall Don't send wall message before reboot/halt/power-off\n\n"
+ "Commands:\n"
+ " 0 Power-off the machine\n"
+ " 6 Reboot the machine\n"
+ " 2, 3, 4, 5 Start runlevelX.target unit\n"
+ " 1, s, S Enter rescue mode\n"
+ " q, Q Reload init daemon configuration\n"
+ " u, U Reexecute init daemon\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int runlevel_help(void) {
+
+ printf("%s [options]\n\n"
+ "Prints the previous and current runlevel of the init system.\n\n"
+ " --help Show this help\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int systemctl_parse_argv(int argc, char *argv[]) {
enum {
ARG_REPLACE = 0x100,
ARG_SESSION,
ARG_SYSTEM,
ARG_BLOCK,
+ ARG_NO_WALL
};
static const struct option options[] = {
@@ -1344,12 +1525,13 @@ static int parse_argv(int argc, char *argv[]) {
{ "session", no_argument, NULL, ARG_SESSION },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "block", no_argument, NULL, ARG_BLOCK },
+ { "no-wall", no_argument, NULL, ARG_NO_WALL },
{ NULL, 0, NULL, 0 }
};
int c;
- assert(argc >= 1);
+ assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hta", options, NULL)) >= 0) {
@@ -1357,7 +1539,7 @@ static int parse_argv(int argc, char *argv[]) {
switch (c) {
case 'h':
- help();
+ systemctl_help();
return 0;
case 't':
@@ -1384,6 +1566,10 @@ static int parse_argv(int argc, char *argv[]) {
arg_block = true;
break;
+ case ARG_NO_WALL:
+ arg_no_wall = true;
+ break;
+
case '?':
return -EINVAL;
@@ -1396,57 +1582,511 @@ static int parse_argv(int argc, char *argv[]) {
return 1;
}
-int main(int argc, char*argv[]) {
+static int halt_parse_argv(int argc, char *argv[]) {
- static const struct {
- const char* verb;
- const enum {
- MORE,
- LESS,
- EQUAL
- } argc_cmp;
- const int argc;
- int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
- } verbs[] = {
- { "list-units", LESS, 1, list_units },
- { "list-jobs", EQUAL, 1, list_jobs },
- { "clear-jobs", EQUAL, 1, clear_jobs },
- { "load", MORE, 2, load_unit },
- { "cancel", MORE, 2, cancel_job },
- { "start", MORE, 2, start_unit },
- { "stop", MORE, 2, start_unit },
- { "reload", MORE, 2, start_unit },
- { "restart", MORE, 2, start_unit },
- { "isolate", EQUAL, 2, isolate_unit },
- { "monitor", EQUAL, 1, monitor },
- { "dump", EQUAL, 1, dump },
- { "snapshot", LESS, 2, snapshot },
- { "daemon-reload", EQUAL, 1, clear_jobs },
- { "daemon-reexec", EQUAL, 1, clear_jobs },
- { "daemon-exit", EQUAL, 1, clear_jobs },
- { "show-environment", EQUAL, 1, show_enviroment },
- { "set-environment", MORE, 2, set_environment },
- { "unset-environment", MORE, 2, set_environment },
+ enum {
+ ARG_HELP = 0x100,
+ ARG_HALT,
+ ARG_REBOOT,
+ ARG_NO_WALL
};
- int r, retval = 1, left;
- unsigned i;
- DBusConnection *bus = NULL;
- DBusError error;
+ 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 }
+ };
- dbus_error_init(&error);
+ int c, runlevel;
- log_set_target(LOG_TARGET_CONSOLE);
- log_set_max_level(LOG_INFO);
- log_parse_environment();
+ assert(argc >= 0);
+ assert(argv);
- if ((r = parse_argv(argc, argv)) < 0)
- goto finish;
- else if (r == 0) {
- retval = 0;
+ if (utmp_get_runlevel(&runlevel, NULL) >= 0)
+ if (runlevel == '0' || runlevel == '6')
+ arg_immediate = true;
+
+ while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
+ switch (c) {
+
+ case ARG_HELP:
+ halt_help();
+ return 0;
+
+ case ARG_HALT:
+ arg_action = ACTION_HALT;
+ break;
+
+ case 'p':
+ arg_action = ACTION_POWEROFF;
+ break;
+
+ case ARG_REBOOT:
+ arg_action = ACTION_REBOOT;
+ break;
+
+ case 'f':
+ arg_immediate = true;
+ break;
+
+ case 'w':
+ arg_dry = true;
+ break;
+
+ case 'd':
+ arg_no_wtmp = true;
+ break;
+
+ case 'n':
+ arg_no_sync = true;
+ break;
+
+ case ARG_NO_WALL:
+ arg_no_wall = true;
+ break;
+
+ case 'i':
+ case 'h':
+ /* Compatibility nops */
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ if (optind < argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static int shutdown_parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_HELP = 0x100,
+ ARG_NO_WALL
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, ARG_HELP },
+ { "halt", no_argument, NULL, 'H' },
+ { "poweroff", no_argument, NULL, 'P' },
+ { "reboot", no_argument, NULL, 'r' },
+ { "no-wall", no_argument, NULL, ARG_NO_WALL },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "HPrhkt:a", options, NULL)) >= 0) {
+ switch (c) {
+
+ case ARG_HELP:
+ shutdown_help();
+ return 0;
+
+ case 'H':
+ arg_action = ACTION_HALT;
+ break;
+
+ case 'P':
+ arg_action = ACTION_POWEROFF;
+ break;
+
+ case 'r':
+ arg_action = ACTION_REBOOT;
+ break;
+
+ case 'h':
+ if (arg_action != ACTION_HALT)
+ arg_action = ACTION_POWEROFF;
+ break;
+
+ case 'k':
+ arg_dry = true;
+ break;
+
+ case ARG_NO_WALL:
+ arg_no_wall = true;
+ break;
+
+ case 't':
+ case 'a':
+ /* Compatibility nops */
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ if (argc > optind && !streq(argv[optind], "now")) {
+ log_error("Expected 'now' argument.");
+ return -EINVAL;
+ }
+
+ /* We ignore the time argument */
+ if (argc > optind + 1)
+ arg_wall = argv + optind + 1;
+
+ optind = argc;
+
+ return 1;
+
+}
+
+static int telinit_parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_HELP = 0x100,
+ ARG_NO_WALL
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, ARG_HELP },
+ { "no-wall", no_argument, NULL, ARG_NO_WALL },
+ { NULL, 0, NULL, 0 }
+ };
+
+ static const struct {
+ char from;
+ enum action to;
+ } table[] = {
+ { '0', ACTION_POWEROFF },
+ { '6', ACTION_REBOOT },
+ { '1', ACTION_RESCUE },
+ { '2', ACTION_RUNLEVEL2 },
+ { '3', ACTION_RUNLEVEL3 },
+ { '4', ACTION_RUNLEVEL4 },
+ { '5', ACTION_RUNLEVEL5 },
+ { 's', ACTION_RESCUE },
+ { 'S', ACTION_RESCUE },
+ { 'q', ACTION_RELOAD },
+ { 'Q', ACTION_RELOAD },
+ { 'u', ACTION_REEXEC },
+ { 'U', ACTION_REEXEC }
+ };
+
+ unsigned i;
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
+ switch (c) {
+
+ case ARG_HELP:
+ telinit_help();
+ return 0;
+
+ case ARG_NO_WALL:
+ arg_no_wall = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ if (optind >= argc) {
+ log_error("Argument missing.");
+ return -EINVAL;
+ }
+
+ if (optind + 1 < argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+
+ if (strlen(argv[optind]) != 1) {
+ log_error("Expected single character argument.");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ELEMENTSOF(table); i++)
+ if (table[i].from == argv[optind][0])
+ break;
+
+ if (i >= ELEMENTSOF(table)) {
+ log_error("Unknown command %s.", argv[optind]);
+ return -EINVAL;
+ }
+
+ arg_action = table[i].to;
+
+ optind ++;
+
+ return 1;
+}
+
+static int runlevel_parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_HELP = 0x100,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, ARG_HELP },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
+ switch (c) {
+
+ case ARG_HELP:
+ runlevel_help();
+ return 0;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ if (optind < argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+ assert(argc >= 0);
+ assert(argv);
+
+ if (program_invocation_short_name) {
+
+ if (strstr(program_invocation_short_name, "halt")) {
+ arg_action = ACTION_HALT;
+ return halt_parse_argv(argc, argv);
+ } else if (strstr(program_invocation_short_name, "poweroff")) {
+ arg_action = ACTION_POWEROFF;
+ return halt_parse_argv(argc, argv);
+ } else if (strstr(program_invocation_short_name, "reboot")) {
+ arg_action = ACTION_REBOOT;
+ return halt_parse_argv(argc, argv);
+ } else if (strstr(program_invocation_short_name, "shutdown")) {
+ arg_action = ACTION_POWEROFF;
+ return shutdown_parse_argv(argc, argv);
+ } else if (strstr(program_invocation_short_name, "init")) {
+ arg_action = ACTION_INVALID;
+ return telinit_parse_argv(argc, argv);
+ } else if (strstr(program_invocation_short_name, "runlevel")) {
+ arg_action = ACTION_RUNLEVEL;
+ return runlevel_parse_argv(argc, argv);
+ }
+ }
+
+ arg_action = ACTION_SYSTEMCTL;
+ return systemctl_parse_argv(argc, argv);
+}
+
+static int action_to_runlevel(void) {
+
+ static const char table[_ACTION_MAX] = {
+ [ACTION_HALT] = '0',
+ [ACTION_POWEROFF] = '0',
+ [ACTION_REBOOT] = '6',
+ [ACTION_RUNLEVEL2] = '2',
+ [ACTION_RUNLEVEL3] = '3',
+ [ACTION_RUNLEVEL4] = '4',
+ [ACTION_RUNLEVEL5] = '5',
+ [ACTION_RESCUE] = '1'
+ };
+
+ assert(arg_action < _ACTION_MAX);
+
+ return table[arg_action];
+}
+
+static int talk_upstart(DBusConnection *bus) {
+ 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;
+
+ dbus_error_init(&error);
+
+ if (!(rl = action_to_runlevel()))
+ return 0;
+
+ if (utmp_get_runlevel(&previous, NULL) < 0)
+ previous = 'N';
+
+ if (!(m = dbus_message_new_method_call(
+ "com.ubuntu.Upstart",
+ "/com/ubuntu/Upstart",
+ "com.ubuntu.Upstart0_6",
+ "EmitEvent"))) {
+
+ log_error("Could not allocate message.");
+ return -ENOMEM;
+ }
+
+ dbus_message_iter_init_append(m, &iter);
+
+ env1_buf[sizeof(env1_buf)-2] = rl;
+ env2_buf[sizeof(env2_buf)-2] = previous;
+
+ if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
+ !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
+ !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
+ !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
+ !dbus_message_iter_close_container(&iter, &sub) ||
+ !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
+ log_error("Could not append arguments to message.");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
+
+ if (error_is_no_service(&error)) {
+ r = 0;
+ goto finish;
+ }
+
+ log_error("Failed to issue method call: %s", error.message);
+ r = -EIO;
goto finish;
}
+ r = 1;
+
+finish:
+ if (m)
+ dbus_message_unref(m);
+
+ if (reply)
+ dbus_message_unref(reply);
+
+ dbus_error_free(&error);
+
+ return r;
+}
+
+static int talk_initctl(void) {
+ struct init_request request;
+ int r, fd;
+ char rl;
+
+ if (!(rl = action_to_runlevel()))
+ return 0;
+
+ zero(request);
+ request.magic = INIT_MAGIC;
+ request.sleeptime = 0;
+ request.cmd = INIT_CMD_RUNLVL;
+ request.runlevel = rl;
+
+ if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
+
+ if (errno == ENOENT)
+ return 0;
+
+ log_error("Failed to open "INIT_FIFO": %m");
+ return -errno;
+ }
+
+ errno = 0;
+ r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
+ close_nointr_nofail(fd);
+
+ if (r < 0) {
+ log_error("Failed to write to "INIT_FIFO": %m");
+ return errno ? -errno : -EIO;
+ }
+
+ return 1;
+}
+
+static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
+
+ static const struct {
+ const char* verb;
+ const enum {
+ MORE,
+ LESS,
+ EQUAL
+ } argc_cmp;
+ const int argc;
+ int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
+ } verbs[] = {
+ { "list-units", LESS, 1, list_units },
+ { "list-jobs", EQUAL, 1, list_jobs },
+ { "clear-jobs", EQUAL, 1, clear_jobs },
+ { "load", MORE, 2, load_unit },
+ { "cancel", MORE, 2, cancel_job },
+ { "start", MORE, 2, start_unit },
+ { "stop", MORE, 2, start_unit },
+ { "reload", MORE, 2, start_unit },
+ { "restart", MORE, 2, start_unit },
+ { "isolate", EQUAL, 2, start_unit },
+ { "monitor", EQUAL, 1, monitor },
+ { "dump", EQUAL, 1, dump },
+ { "snapshot", LESS, 2, snapshot },
+ { "daemon-reload", EQUAL, 1, clear_jobs },
+ { "daemon-reexec", EQUAL, 1, clear_jobs },
+ { "daemon-exit", EQUAL, 1, clear_jobs },
+ { "show-environment", EQUAL, 1, show_enviroment },
+ { "set-environment", MORE, 2, set_environment },
+ { "unset-environment", MORE, 2, set_environment },
+ { "halt", EQUAL, 1, start_special },
+ { "poweroff", EQUAL, 1, start_special },
+ { "reboot", EQUAL, 1, start_special },
+ { "default", EQUAL, 1, start_special },
+ { "rescue", EQUAL, 1, start_special },
+ { "emergency", EQUAL, 1, start_special },
+ };
+
+ int left;
+ unsigned i;
+
+ assert(bus);
+ assert(argc >= 0);
+ assert(argv);
+
left = argc - optind;
if (left <= 0)
@@ -1459,7 +2099,7 @@ int main(int argc, char*argv[]) {
if (i >= ELEMENTSOF(verbs)) {
log_error("Unknown operation %s", argv[optind]);
- goto finish;
+ return -EINVAL;
}
}
@@ -1468,7 +2108,7 @@ int main(int argc, char*argv[]) {
case EQUAL:
if (left != verbs[i].argc) {
log_error("Invalid number of arguments.");
- goto finish;
+ return -EINVAL;
}
break;
@@ -1476,7 +2116,7 @@ int main(int argc, char*argv[]) {
case MORE:
if (left < verbs[i].argc) {
log_error("Too few arguments.");
- goto finish;
+ return -EINVAL;
}
break;
@@ -1484,7 +2124,7 @@ int main(int argc, char*argv[]) {
case LESS:
if (left > verbs[i].argc) {
log_error("Too many arguments.");
- goto finish;
+ return -EINVAL;
}
break;
@@ -1493,20 +2133,187 @@ int main(int argc, char*argv[]) {
assert_not_reached("Unknown comparison operator.");
}
- if (!(bus = dbus_bus_get(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
- log_error("Failed to get D-Bus connection: %s", error.message);
+ return verbs[i].dispatch(bus, argv + optind, left);
+}
+
+static int reload_with_fallback(DBusConnection *bus) {
+ int r;
+
+ if (bus) {
+ /* First, try systemd via D-Bus. */
+ if ((r = clear_jobs(bus, NULL, 0)) > 0)
+ return 0;
+ }
+
+ /* Nothing else worked, so let's try signals */
+ assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
+
+ if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
+ log_error("kill() failed: %m");
+ return -errno;
+ }
+
+ return 0;
+}
+
+static int start_with_fallback(DBusConnection *bus) {
+ int r;
+
+ warn_wall(arg_action);
+
+ if (bus) {
+ /* First, try systemd via D-Bus. */
+ if ((r = start_unit(bus, NULL, 0)) > 0)
+ return 0;
+
+ /* Hmm, talking to systemd via D-Bus didn't work. Then
+ * let's try to talk to Upstart via D-Bus. */
+ if ((r = talk_upstart(bus)) > 0)
+ return 0;
+ }
+
+ /* Nothing else worked, so let's try
+ * /dev/initctl */
+ if ((r = talk_initctl()) != 0)
+ return 0;
+
+ log_error("Failed to talk to init daemon.");
+ return -EIO;
+}
+
+static int halt_main(DBusConnection *bus) {
+ int r;
+
+ if (!arg_immediate)
+ return start_with_fallback(bus);
+
+ if (!arg_no_wtmp)
+ if ((r = utmp_put_shutdown(0)) < 0)
+ log_warning("Failed to write utmp record: %s", strerror(-r));
+
+ if (!arg_no_sync)
+ sync();
+
+ if (arg_dry)
+ return 0;
+
+ /* Make sure C-A-D is handled by the kernel from this
+ * point on... */
+ reboot(RB_ENABLE_CAD);
+
+ switch (arg_action) {
+
+ case ACTION_HALT:
+ log_info("Halting");
+ reboot(RB_HALT_SYSTEM);
+ break;
+
+ case ACTION_POWEROFF:
+ log_info("Powering off");
+ reboot(RB_POWER_OFF);
+ break;
+
+ case ACTION_REBOOT:
+ log_info("Rebooting");
+ reboot(RB_AUTOBOOT);
+ break;
+
+ default:
+ assert_not_reached("Unknown halt action.");
+ }
+
+ /* We should never reach this. */
+ return -ENOSYS;
+}
+
+static int runlevel_main(void) {
+ int r, runlevel, previous;
+
+ if ((r = utmp_get_runlevel(&runlevel, &previous)) < 0) {
+ printf("unknown");
+ return r;
+ }
+
+ printf("%c %c\n",
+ previous <= 0 ? 'N' : previous,
+ runlevel <= 0 ? 'N' : runlevel);
+
+ return 0;
+}
+
+int main(int argc, char*argv[]) {
+ int r, retval = 1;
+ DBusConnection *bus = NULL;
+ DBusError error;
+
+ dbus_error_init(&error);
+
+ log_parse_environment();
+
+ if ((r = parse_argv(argc, argv)) < 0)
goto finish;
+ else if (r == 0) {
+ retval = 0;
+ goto finish;
+ }
+
+ /* /sbin/runlevel doesn't need to communicate via D-Bus, so
+ * let's shortcut this */
+ if (arg_action == ACTION_RUNLEVEL) {
+ retval = runlevel_main() < 0;
+ goto finish;
+ }
+
+ if ((bus = dbus_bus_get(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error)))
+ dbus_connection_set_exit_on_disconnect(bus, FALSE);
+
+ switch (arg_action) {
+
+ case ACTION_SYSTEMCTL: {
+
+ if (!bus) {
+ log_error("Failed to get D-Bus connection: %s", error.message);
+ goto finish;
+ }
+
+ retval = systemctl_main(bus, argc, argv) < 0;
+ break;
}
- dbus_connection_set_exit_on_disconnect(bus, FALSE);
+ case ACTION_HALT:
+ case ACTION_POWEROFF:
+ case ACTION_REBOOT:
+ retval = halt_main(bus) < 0;
+ break;
+
+ case ACTION_RUNLEVEL2:
+ case ACTION_RUNLEVEL3:
+ case ACTION_RUNLEVEL4:
+ case ACTION_RUNLEVEL5:
+ case ACTION_RESCUE:
+ case ACTION_EMERGENCY:
+ case ACTION_DEFAULT:
+ retval = start_with_fallback(bus) < 0;
+ break;
- retval = verbs[i].dispatch(bus, argv + optind, left) < 0;
+ case ACTION_RELOAD:
+ case ACTION_REEXEC:
+ retval = reload_with_fallback(bus) < 0;
+ break;
+
+ case ACTION_INVALID:
+ case ACTION_RUNLEVEL:
+ default:
+ assert_not_reached("Unknown action");
+ }
finish:
if (bus)
dbus_connection_unref(bus);
+ dbus_error_free(&error);
+
dbus_shutdown();
return retval;