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3dab29438c
systemd/src/systemctl.c

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112 KiB
C
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/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/reboot.h>
#include <stdio.h>
#include <getopt.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <dbus/dbus.h>
#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"
static const char *arg_type = NULL;
static const char *arg_property = NULL;
static bool arg_all = false;
static bool arg_replace = false;
static bool arg_session = false;
static bool arg_no_block = false;
static bool arg_immediate = false;
static bool arg_no_wtmp = false;
static bool arg_no_sync = false;
static bool arg_no_wall = false;
static bool arg_dry = false;
static bool arg_quiet = false;
static char **arg_wall = NULL;
enum action {
ACTION_INVALID,
ACTION_SYSTEMCTL,
ACTION_HALT,
ACTION_POWEROFF,
ACTION_REBOOT,
ACTION_RUNLEVEL2,
ACTION_RUNLEVEL3,
ACTION_RUNLEVEL4,
ACTION_RUNLEVEL5,
ACTION_RESCUE,
ACTION_EMERGENCY,
ACTION_DEFAULT,
ACTION_RELOAD,
ACTION_REEXEC,
ACTION_RUNLEVEL,
_ACTION_MAX
} arg_action = ACTION_SYSTEMCTL;
static bool private_bus = false;
static bool error_is_no_service(DBusError *error) {
assert(error);
if (!dbus_error_is_set(error))
return false;
if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
return true;
if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
return true;
return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
}
static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
assert(iter);
assert(data);
if (dbus_message_iter_get_arg_type(iter) != type)
return -EIO;
dbus_message_iter_get_basic(iter, data);
if (!dbus_message_iter_next(iter) != !next)
return -EIO;
return 0;
}
static int columns(void) {
static int parsed_columns = 0;
const char *e;
if (parsed_columns > 0)
return parsed_columns;
if ((e = getenv("COLUMNS")))
parsed_columns = atoi(e);
if (parsed_columns <= 0) {
struct winsize ws;
zero(ws);
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) >= 0)
parsed_columns = ws.ws_col;
}
if (parsed_columns <= 0)
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) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
DBusMessageIter iter, sub, sub2;
unsigned k = 0;
dbus_error_init(&error);
assert(bus);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"ListUnits"))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
printf("%-45s %-6s %-12s %-12s %-15s %s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB", "DESCRIPTION");
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
const char *id, *description, *load_state, *active_state, *sub_state, *unit_state, *job_type, *job_path, *dot;
uint32_t job_id;
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_state, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &job_id, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &job_type, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, false) < 0) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
if ((!arg_type || ((dot = strrchr(id, '.')) &&
streq(dot+1, arg_type))) &&
(arg_all || !streq(active_state, "inactive"))) {
int a = 0, b = 0;
if (streq(active_state, "maintenance"))
fputs(ANSI_HIGHLIGHT_ON, stdout);
printf("%-45s %-6s %-12s %-12s%n", id, load_state, active_state, sub_state, &a);
if (job_id != 0)
printf(" %-15s%n", job_type, &b);
else
b = 1 + 15;
if (a + b + 2 < columns()) {
if (job_id == 0)
printf(" ");
printf(" %.*s", columns() - a - b - 2, description);
}
if (streq(active_state, "maintenance"))
fputs(ANSI_HIGHLIGHT_OFF, stdout);
fputs("\n", stdout);
k++;
}
dbus_message_iter_next(&sub);
}
if (arg_all)
printf("\n%u units listed.\n", k);
else
printf("\n%u live units listed. Pass --all to see dead units, too.\n", k);
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
DBusMessageIter iter, sub, sub2;
unsigned k = 0;
dbus_error_init(&error);
assert(bus);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"ListJobs"))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
const char *name, *type, *state, *job_path, *unit_path;
uint32_t id;
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
printf("%4u %-45s %-17s %-7s\n", id, name, type, state);
k++;
dbus_message_iter_next(&sub);
}
printf("\n%u jobs listed.\n", k);
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int load_unit(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
unsigned i;
dbus_error_init(&error);
assert(bus);
assert(args);
for (i = 1; i < n; i++) {
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"LoadUnit"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &args[i],
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
dbus_message_unref(reply);
m = reply = NULL;
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
unsigned i;
dbus_error_init(&error);
assert(bus);
assert(args);
for (i = 1; i < n; i++) {
unsigned id;
const char *path;
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetJob"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if ((r = safe_atou(args[i], &id)) < 0) {
log_error("Failed to parse job id: %s", strerror(-r));
goto finish;
}
assert_cc(sizeof(uint32_t) == sizeof(id));
if (!dbus_message_append_args(m,
DBUS_TYPE_UINT32, &id,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.systemd1.Job",
"Cancel"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
dbus_message_unref(reply);
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
dbus_message_unref(reply);
m = reply = NULL;
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
typedef struct WaitData {
Set *set;
bool failed;
} WaitData;
static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
DBusError error;
WaitData *d = data;
assert(connection);
assert(message);
assert(d);
dbus_error_init(&error);
log_debug("Got D-Bus request: %s.%s() on %s",
dbus_message_get_interface(message),
dbus_message_get_member(message),
dbus_message_get_path(message));
if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
log_error("Warning! D-Bus connection terminated.");
dbus_connection_close(connection);
} else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
uint32_t id;
const char *path;
dbus_bool_t success = true;
if (!dbus_message_get_args(message, &error,
DBUS_TYPE_UINT32, &id,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_BOOLEAN, &success,
DBUS_TYPE_INVALID))
log_error("Failed to parse message: %s", error.message);
else {
char *p;
if ((p = set_remove(d->set, (char*) path)))
free(p);
if (!success)
d->failed = true;
}
}
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
static int enable_wait_for_jobs(DBusConnection *bus) {
DBusError error;
assert(bus);
if (private_bus)
return 0;
dbus_error_init(&error);
dbus_bus_add_match(bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Manager',"
"member='JobRemoved',"
"path='/org/freedesktop/systemd1'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match: %s", error.message);
dbus_error_free(&error);
return -EIO;
}
/* This is slightly dirty, since we don't undo the match registrations. */
return 0;
}
static int wait_for_jobs(DBusConnection *bus, Set *s) {
int r;
WaitData d;
assert(bus);
assert(s);
zero(d);
d.set = s;
d.failed = false;
if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
log_error("Failed to add filter.");
r = -ENOMEM;
goto finish;
}
while (!set_isempty(s) &&
dbus_connection_read_write_dispatch(bus, -1))
;
if (!arg_quiet && d.failed)
log_error("Job failed, see logs for details.");
r = d.failed ? -EIO : 0;
finish:
/* This is slightly dirty, since we don't undo the filter registration. */
return r;
}
static int start_unit_one(
DBusConnection *bus,
const char *method,
const char *name,
const char *mode,
Set *s) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
assert(bus);
assert(method);
assert(name);
assert(mode);
assert(arg_no_block || s);
dbus_error_init(&error);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
method))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_STRING, &mode,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
/* There's always a fallback possible for
* legacy actions. */
r = 0;
goto finish;
}
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!arg_no_block) {
const char *path;
char *p;
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
if (!(p = strdup(path))) {
log_error("Failed to duplicate path.");
r = -ENOMEM;
goto finish;
}
if ((r = set_put(s, p)) < 0) {
free(p);
log_error("Failed to add path to set.");
goto finish;
}
}
r = 1;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static enum action verb_to_action(const char *verb) {
if (streq(verb, "halt"))
return ACTION_HALT;
else if (streq(verb, "poweroff"))
return ACTION_POWEROFF;
else if (streq(verb, "reboot"))
return ACTION_REBOOT;
else if (streq(verb, "rescue"))
return ACTION_RESCUE;
else if (streq(verb, "emergency"))
return ACTION_EMERGENCY;
else if (streq(verb, "default"))
return ACTION_DEFAULT;
else
return ACTION_INVALID;
}
static int start_unit(DBusConnection *bus, char **args, unsigned n) {
static const char * const table[_ACTION_MAX] = {
[ACTION_HALT] = SPECIAL_HALT_TARGET,
[ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
[ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
[ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
[ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
[ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
[ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
[ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
[ACTION_EMERGENCY] = SPECIAL_EMERGENCY_SERVICE,
[ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
};
int r;
unsigned i;
const char *method, *mode, *one_name;
Set *s = NULL;
assert(bus);
if (arg_action == ACTION_SYSTEMCTL) {
method =
streq(args[0], "stop") ? "StopUnit" :
streq(args[0], "reload") ? "ReloadUnit" :
streq(args[0], "restart") ? "RestartUnit" :
"StartUnit";
mode =
(streq(args[0], "isolate") ||
streq(args[0], "rescue") ||
streq(args[0], "emergency")) ? "isolate" :
arg_replace ? "replace" :
"fail";
one_name = table[verb_to_action(args[0])];
} else {
assert(arg_action < ELEMENTSOF(table));
assert(table[arg_action]);
method = "StartUnit";
mode = (arg_action == ACTION_EMERGENCY ||
arg_action == ACTION_RESCUE) ? "isolate" : "replace";
one_name = table[arg_action];
}
if (!arg_no_block) {
if ((r = enable_wait_for_jobs(bus)) < 0) {
log_error("Could not watch jobs: %s", strerror(-r));
goto finish;
}
if (!(s = set_new(string_hash_func, string_compare_func))) {
log_error("Failed to allocate set.");
r = -ENOMEM;
goto finish;
}
}
r = 0;
if (one_name) {
if ((r = start_unit_one(bus, method, one_name, mode, s)) <= 0)
goto finish;
} else {
for (i = 1; i < n; i++)
if ((r = start_unit_one(bus, method, args[i], mode, s)) < 0)
goto finish;
}
if (!arg_no_block)
r = wait_for_jobs(bus, s);
finish:
if (s)
set_free_free(s);
return r;
}
static int start_special(DBusConnection *bus, char **args, unsigned n) {
assert(bus);
assert(args);
warn_wall(verb_to_action(args[0]));
return start_unit(bus, args, n);
}
static int check_unit(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
const char
*interface = "org.freedesktop.systemd1.Unit",
*property = "ActiveState";
int r = -EADDRNOTAVAIL;
DBusError error;
unsigned i;
assert(bus);
assert(args);
dbus_error_init(&error);
for (i = 1; i < n; i++) {
const char *path = NULL;
const char *state;
DBusMessageIter iter, sub;
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetUnit"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &args[i],
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
/* Hmm, cannot figure out anything about this unit... */
if (!arg_quiet)
puts("unknown");
dbus_error_free(&error);
continue;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.DBus.Properties",
"Get"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &property,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
dbus_message_unref(reply);
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_get_basic(&sub, &state);
if (!arg_quiet)
puts(state);
if (streq(state, "active") || startswith(state, "reloading"))
r = 0;
dbus_message_unref(m);
dbus_message_unref(reply);
m = reply = NULL;
}
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static void show_cgroup(const char *name) {
char *fn;
FILE *f;
pid_t last = 0;
if (!startswith(name, "name=systemd:"))
return;
if (asprintf(&fn, "/cgroup/systemd/%s/tasks", name + 13) < 0)
return;
f = fopen(fn, "r");
free(fn);
if (!f)
return;
while (!feof(f)) {
unsigned long ul;
if (fscanf(f, "%lu", &ul) != 1)
break;
if (ul <= 0)
continue;
if (last > 0) {
char *t = NULL;
get_process_cmdline(last, 60, &t);
printf("\t\t \342\224\234 %lu %s\n", (unsigned long) last, strna(t));
free(t);
} else
printf("\t\t \342\224\202\n");
last = (pid_t) ul;
}
if (last > 0) {
char *t = NULL;
get_process_cmdline(last, 60, &t);
printf("\t\t \342\224\224 %lu %s\n", (unsigned long) last, strna(t));
free(t);
}
fclose(f);
}
typedef struct UnitStatusInfo {
const char *id;
const char *load_state;
const char *active_state;
const char *sub_state;
const char *description;
const char *fragment_path;
const char *default_control_group;
/* Service */
pid_t main_pid;
pid_t control_pid;
const char *status_text;
bool running;
usec_t start_timestamp;
usec_t exit_timestamp;
int exit_code, exit_status;
/* Socket */
unsigned n_accepted;
unsigned n_connections;
/* Device */
const char *sysfs_path;
/* Mount, Automount */
const char *where;
/* Swap */
const char *what;
} UnitStatusInfo;
static void print_status_info(UnitStatusInfo *i) {
assert(i);
/* This shows pretty information about a unit. See
* print_property() for a low-level property printer */
printf("%s", strna(i->id));
if (i->description && !streq_ptr(i->id, i->description))
printf(" - %s", i->description);
printf("\n");
if (i->fragment_path)
printf("\t Loaded: %s (%s)\n", strna(i->load_state), i->fragment_path);
else if (streq_ptr(i->load_state, "failed"))
printf("\t Loaded: " ANSI_HIGHLIGHT_ON "%s" ANSI_HIGHLIGHT_OFF "\n", strna(i->load_state));
else
printf("\t Loaded: %s\n", strna(i->load_state));
if (streq_ptr(i->active_state, "maintenance"))
printf("\t Active: " ANSI_HIGHLIGHT_ON "%s (%s)" ANSI_HIGHLIGHT_OFF "\n",
strna(i->active_state),
strna(i->sub_state));
else
printf("\t Active: %s (%s)\n",
strna(i->active_state),
strna(i->sub_state));
if (i->sysfs_path)
printf("\t Device: %s\n", i->sysfs_path);
else if (i->where)
printf("\t Where: %s\n", i->where);
else if (i->what)
printf("\t What: %s\n", i->what);
if (i->status_text)
printf("\t Status: \"%s\"\n", i->status_text);
if (i->id && endswith(i->id, ".socket"))
printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
if (i->main_pid > 0 || i->control_pid > 0) {
printf("\t");
if (i->main_pid > 0) {
printf(" Process: %u", (unsigned) i->main_pid);
if (i->running) {
char *t = NULL;
get_process_name(i->main_pid, &t);
if (t) {
printf(" (%s)", t);
free(t);
}
} else {
printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
if (i->exit_code == CLD_EXITED)
printf("status=%i", i->exit_status);
else
printf("signal=%s", strsignal(i->exit_status));
printf(")");
}
}
if (i->main_pid > 0 && i->control_pid > 0)
printf(";");
if (i->control_pid > 0) {
char *t = NULL;
printf(" Control: %u", (unsigned) i->control_pid);
get_process_name(i->control_pid, &t);
if (t) {
printf(" (%s)", t);
free(t);
}
}
printf("\n");
}
if (i->default_control_group) {
printf("\t CGroup: %s\n", i->default_control_group);
show_cgroup(i->default_control_group);
}
}
static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
switch (dbus_message_iter_get_arg_type(iter)) {
case DBUS_TYPE_STRING: {
const char *s;
dbus_message_iter_get_basic(iter, &s);
if (s[0]) {
if (streq(name, "Id"))
i->id = s;
else if (streq(name, "LoadState"))
i->load_state = s;
else if (streq(name, "ActiveState"))
i->active_state = s;
else if (streq(name, "SubState"))
i->sub_state = s;
else if (streq(name, "Description"))
i->description = s;
else if (streq(name, "FragmentPath"))
i->fragment_path = s;
else if (streq(name, "DefaultControlGroup"))
i->default_control_group = s;
else if (streq(name, "StatusText"))
i->status_text = s;
else if (streq(name, "SysFSPath"))
i->sysfs_path = s;
else if (streq(name, "Where"))
i->where = s;
else if (streq(name, "What"))
i->what = s;
}
break;
}
case DBUS_TYPE_UINT32: {
uint32_t u;
dbus_message_iter_get_basic(iter, &u);
if (streq(name, "MainPID")) {
if (u > 0) {
i->main_pid = (pid_t) u;
i->running = true;
}
} else if (streq(name, "ControlPID"))
i->control_pid = (pid_t) u;
else if (streq(name, "ExecMainPID")) {
if (u > 0)
i->main_pid = (pid_t) u;
} else if (streq(name, "NAccepted"))
i->n_accepted = u;
else if (streq(name, "NConnections"))
i->n_connections = u;
break;
}
case DBUS_TYPE_INT32: {
int32_t j;
dbus_message_iter_get_basic(iter, &j);
if (streq(name, "ExecMainCode"))
i->exit_code = (int) j;
else if (streq(name, "ExecMainStatus"))
i->exit_status = (int) j;
break;
}
case DBUS_TYPE_UINT64: {
uint64_t u;
dbus_message_iter_get_basic(iter, &u);
if (streq(name, "ExecMainStartTimestamp"))
i->start_timestamp = (usec_t) u;
else if (streq(name, "ExecMainExitTimestamp"))
i->exit_timestamp = (usec_t) u;
break;
}
}
return 0;
}
static int print_property(const char *name, DBusMessageIter *iter) {
assert(name);
assert(iter);
/* This is a low-level property printer, see
* print_status_info() for the nicer output */
if (arg_property && !streq(name, arg_property))
return 0;
switch (dbus_message_iter_get_arg_type(iter)) {
case DBUS_TYPE_STRING: {
const char *s;
dbus_message_iter_get_basic(iter, &s);
if (arg_all || s[0])
printf("%s=%s\n", name, s);
return 0;
}
case DBUS_TYPE_BOOLEAN: {
dbus_bool_t b;
dbus_message_iter_get_basic(iter, &b);
printf("%s=%s\n", name, yes_no(b));
return 0;
}
case DBUS_TYPE_UINT64: {
uint64_t u;
dbus_message_iter_get_basic(iter, &u);
/* Yes, heuristics! But we can change this check
* should it turn out to not be sufficient */
if (strstr(name, "Timestamp")) {
char timestamp[FORMAT_TIMESTAMP_MAX], *t;
if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
printf("%s=%s\n", name, strempty(t));
} else if (strstr(name, "USec")) {
char timespan[FORMAT_TIMESPAN_MAX];
printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
} else
printf("%s=%llu\n", name, (unsigned long long) u);
return 0;
}
case DBUS_TYPE_UINT32: {
uint32_t u;
dbus_message_iter_get_basic(iter, &u);
if (strstr(name, "UMask") || strstr(name, "Mode"))
printf("%s=%04o\n", name, u);
else
printf("%s=%u\n", name, (unsigned) u);
return 0;
}
case DBUS_TYPE_INT32: {
int32_t i;
dbus_message_iter_get_basic(iter, &i);
printf("%s=%i\n", name, (int) i);
return 0;
}
case DBUS_TYPE_STRUCT: {
DBusMessageIter sub;
dbus_message_iter_recurse(iter, &sub);
if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
uint32_t u;
dbus_message_iter_get_basic(&sub, &u);
if (u)
printf("%s=%u\n", name, (unsigned) u);
else if (arg_all)
printf("%s=\n", name);
return 0;
} else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
const char *s;
dbus_message_iter_get_basic(&sub, &s);
if (arg_all || s[0])
printf("%s=%s\n", name, s);
return 0;
}
break;
}
case DBUS_TYPE_ARRAY:
if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
DBusMessageIter sub;
bool space = false;
dbus_message_iter_recurse(iter, &sub);
if (arg_all ||
dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
printf("%s=", name);
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
const char *s;
assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
dbus_message_iter_get_basic(&sub, &s);
printf("%s%s", space ? " " : "", s);
space = true;
dbus_message_iter_next(&sub);
}
puts("");
}
return 0;
} else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
DBusMessageIter sub;
dbus_message_iter_recurse(iter, &sub);
if (arg_all ||
dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
printf("%s=", name);
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
uint8_t u;
assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
dbus_message_iter_get_basic(&sub, &u);
printf("%02x", u);
dbus_message_iter_next(&sub);
}
puts("");
}
return 0;
} else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
DBusMessageIter sub, sub2;
dbus_message_iter_recurse(iter, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
const char *type, *path;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
printf("%s=%s\n", type, path);
dbus_message_iter_next(&sub);
}
return 0;
} else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
DBusMessageIter sub, sub2;
dbus_message_iter_recurse(iter, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
const char *base;
uint64_t value, next_elapse;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
printf("%s={ value=%s ; next_elapse=%s }\n",
base,
format_timespan(timespan1, sizeof(timespan1), value),
format_timespan(timespan2, sizeof(timespan2), next_elapse));
}
dbus_message_iter_next(&sub);
}
return 0;
} else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
DBusMessageIter sub, sub2, sub3;
dbus_message_iter_recurse(iter, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
const char *path;
uint64_t start_time, exit_time;
uint32_t pid;
int32_t code, status;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
continue;
if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
continue;
printf("%s={ path=%s ; argv[]=", name, path);
dbus_message_iter_recurse(&sub2, &sub3);
while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
const char *s;
assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
dbus_message_iter_get_basic(&sub3, &s);
printf("%s ", s);
dbus_message_iter_next(&sub3);
}
if (dbus_message_iter_next(&sub2) &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_time, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_time, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) >= 0 &&
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) >= 0) {
char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
printf("; start=%s ; stop=%s ; pid=%u ; code=%s ; status=%i/%s",
strna(format_timestamp(timestamp1, sizeof(timestamp1), start_time)),
strna(format_timestamp(timestamp2, sizeof(timestamp2), exit_time)),
(unsigned) pid,
sigchld_code_to_string(code),
status,
strempty(code == CLD_EXITED ? NULL : strsignal(status)));
}
printf(" }\n");
dbus_message_iter_next(&sub);
}
return 0;
}
break;
}
if (arg_all)
printf("%s=[unprintable]\n", name);
return 0;
}
static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
DBusMessage *m = NULL, *reply = NULL;
const char *interface = "";
int r;
DBusError error;
DBusMessageIter iter, sub, sub2, sub3;
UnitStatusInfo info;
assert(bus);
assert(path);
assert(new_line);
zero(info);
dbus_error_init(&error);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.DBus.Properties",
"GetAll"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
if (*new_line)
printf("\n");
*new_line = true;
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
const char *name;
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&sub2, &sub3);
if (show_properties)
r = print_property(name, &sub3);
else
r = status_property(name, &sub3, &info);
if (r < 0) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_next(&sub);
}
if (!show_properties)
print_status_info(&info);
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int show(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
int r;
DBusError error;
unsigned i;
bool show_properties, new_line = false;
assert(bus);
assert(args);
dbus_error_init(&error);
show_properties = !streq(args[0], "status");
if (show_properties && n <= 1) {
/* If not argument is specified inspect the manager
* itself */
r = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line);
goto finish;
}
for (i = 1; i < n; i++) {
const char *path = NULL;
uint32_t id;
if (!show_properties || safe_atou32(args[i], &id) < 0) {
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"LoadUnit"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &args[i],
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
dbus_error_free(&error);
dbus_message_unref(m);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetUnit"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &args[i],
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
}
} else {
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetJob"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_UINT32, &id,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
if ((r = show_one(bus, path, show_properties, &new_line)) < 0)
goto finish;
dbus_message_unref(m);
dbus_message_unref(reply);
m = reply = NULL;
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
DBusError error;
DBusMessage *m = NULL, *reply = NULL;
assert(connection);
assert(message);
dbus_error_init(&error);
log_debug("Got D-Bus request: %s.%s() on %s",
dbus_message_get_interface(message),
dbus_message_get_member(message),
dbus_message_get_path(message));
if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
log_error("Warning! D-Bus connection terminated.");
dbus_connection_close(connection);
} else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
const char *id, *path;
if (!dbus_message_get_args(message, &error,
DBUS_TYPE_STRING, &id,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
log_error("Failed to parse message: %s", error.message);
else if (streq(dbus_message_get_member(message), "UnitNew"))
printf("Unit %s added.\n", id);
else
printf("Unit %s removed.\n", id);
} else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
uint32_t id;
const char *path;
if (!dbus_message_get_args(message, &error,
DBUS_TYPE_UINT32, &id,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
log_error("Failed to parse message: %s", error.message);
else if (streq(dbus_message_get_member(message), "JobNew"))
printf("Job %u added.\n", id);
else
printf("Job %u removed.\n", id);
} else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Unit", "Changed") ||
dbus_message_is_signal(message, "org.freedesktop.systemd1.Job", "Changed")) {
const char *path, *interface, *property = "Id";
DBusMessageIter iter, sub;
path = dbus_message_get_path(message);
interface = dbus_message_get_interface(message);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.DBus.Properties",
"Get"))) {
log_error("Could not allocate message.");
goto oom;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &property,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
log_error("Failed to parse reply.");
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
if (streq(interface, "org.freedesktop.systemd1.Unit")) {
const char *id;
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
log_error("Failed to parse reply.");
goto finish;
}
dbus_message_iter_get_basic(&sub, &id);
printf("Unit %s changed.\n", id);
} else {
uint32_t id;
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32) {
log_error("Failed to parse reply.");
goto finish;
}
dbus_message_iter_get_basic(&sub, &id);
printf("Job %u changed.\n", id);
}
}
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
oom:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
static int monitor(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
dbus_error_init(&error);
if (!private_bus) {
dbus_bus_add_match(bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Manager',"
"path='/org/freedesktop/systemd1'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match: %s", error.message);
r = -EIO;
goto finish;
}
dbus_bus_add_match(bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Unit',"
"member='Changed'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match: %s", error.message);
r = -EIO;
goto finish;
}
dbus_bus_add_match(bus,
"type='signal',"
"sender='org.freedesktop.systemd1',"
"interface='org.freedesktop.systemd1.Job',"
"member='Changed'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to add match: %s", error.message);
r = -EIO;
goto finish;
}
}
if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
log_error("Failed to add filter.");
r = -ENOMEM;
goto finish;
}
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"Subscribe"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
while (dbus_connection_read_write_dispatch(bus, -1))
;
r = 0;
finish:
/* This is slightly dirty, since we don't undo the filter or the matches. */
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int dump(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
const char *text;
dbus_error_init(&error);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"Dump"))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_STRING, &text,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
fputs(text, stdout);
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int snapshot(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
const char *name = "", *path, *id;
dbus_bool_t cleanup = FALSE;
DBusMessageIter iter, sub;
const char
*interface = "org.freedesktop.systemd1.Unit",
*property = "Id";
dbus_error_init(&error);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"CreateSnapshot"))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (n > 1)
name = args[1];
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_BOOLEAN, &cleanup,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.DBus.Properties",
"Get"))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &property,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
dbus_message_unref(reply);
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_get_basic(&sub, &id);
if (!arg_quiet)
puts(id);
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
int r;
DBusError error;
unsigned i;
assert(bus);
assert(args);
dbus_error_init(&error);
for (i = 1; i < n; i++) {
const char *path = NULL;
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetUnit"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &args[i],
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.systemd1.Snapshot",
"Remove"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
dbus_message_unref(reply);
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
dbus_message_unref(m);
dbus_message_unref(reply);
m = reply = NULL;
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int clear_jobs(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
const char *method;
dbus_error_init(&error);
if (arg_action == ACTION_RELOAD)
method = "Reload";
else if (arg_action == ACTION_REEXEC)
method = "Reexecute";
else {
assert(arg_action == ACTION_SYSTEMCTL);
method =
streq(args[0], "clear-jobs") ? "ClearJobs" :
streq(args[0], "daemon-reload") ? "Reload" :
streq(args[0], "daemon-reexec") ? "Reexecute" :
"Exit";
}
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
method))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
/* There's always a fallback possible for
* legacy actions. */
r = 0;
goto finish;
}
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
r = 1;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
DBusMessageIter iter, sub, sub2;
int r;
const char
*interface = "org.freedesktop.systemd1.Manager",
*property = "Environment";
dbus_error_init(&error);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.DBus.Properties",
"Get"))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &property,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&iter, &sub);
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_recurse(&sub, &sub2);
while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
const char *text;
if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
log_error("Failed to parse reply.");
r = -EIO;
goto finish;
}
dbus_message_iter_get_basic(&sub2, &text);
printf("%s\n", text);
dbus_message_iter_next(&sub2);
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int set_environment(DBusConnection *bus, char **args, unsigned n) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
const char *method;
DBusMessageIter iter, sub;
unsigned i;
dbus_error_init(&error);
method = streq(args[0], "set-environment")
? "SetEnvironment"
: "UnsetEnvironment";
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
method))) {
log_error("Could not allocate message.");
return -ENOMEM;
}
dbus_message_iter_init_append(m, &iter);
if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
for (i = 1; i < n; i++)
if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_iter_close_container(&iter, &sub)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return r;
}
static int systemctl_help(void) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Send control commands to the systemd manager.\n\n"
" -h --help Show this help\n"
" -t --type=TYPE List only units of a particular type\n"
" -p --property=NAME Show only properties by this name\n"
" -a --all Show all units/properties, including dead/empty ones\n"
" --replace When installing a new job, replace existing conflicting ones\n"
" --system Connect to system bus\n"
" --session Connect to session bus\n"
" -q --quiet Suppress output\n"
" --no-block Do not wait until operation finished\n"
" --no-wall Don't send wall message before halt/power-off/reboot\n\n"
"Commands:\n"
" list-units List units\n"
" start [NAME...] Start one or more units\n"
" stop [NAME...] Stop one or more units\n"
" restart [NAME...] Restart one or more units\n"
" reload [NAME...] Reload one or more units\n"
" isolate [NAME] Start one unit and stop all others\n"
" check [NAME...] Check whether any of the passed units are active\n"
" status [NAME...] Show status of one or more units\n"
" show [NAME...|JOB...] Show properties of one or more units/jobs/manager\n"
" load [NAME...] Load one or more units\n"
" list-jobs List jobs\n"
" cancel [JOB...] Cancel one or more jobs\n"
" clear-jobs Cancel all jobs\n"
" monitor Monitor unit/job changes\n"
" dump Dump server status\n"
" snapshot [NAME] Create a snapshot\n"
" delete [NAME...] Remove one or more snapshots\n"
" daemon-reload Reload systemd manager configuration\n"
" daemon-reexec Reexecute systemd manager\n"
" daemon-exit Ask the systemd manager to quit\n"
" show-environment Dump environment\n"
" set-environment [NAME=VALUE...] Set one or more environment variables\n"
" unset-environment [NAME...] Unset one or more environment variables\n"
" halt Shut down and halt the system\n"
" poweroff Shut down and power-off the system\n"
" reboot Shut down and reboot the system\n"
" default Enter default mode\n"
" rescue Enter rescue mode\n"
" emergency Enter emergency mode\n",
program_invocation_short_name);
return 0;
}
static int halt_help(void) {
printf("%s [OPTIONS...]\n\n"
"%s the system.\n\n"
" --help Show this help\n"
" --halt Halt the machine\n"
" -p --poweroff Switch off the machine\n"
" --reboot Reboot the machine\n"
" -f --force Force immediate halt/power-off/reboot\n"
" -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
" -d --no-wtmp Don't write wtmp record\n"
" -n --no-sync Don't sync before halt/power-off/reboot\n"
" --no-wall Don't send wall message before halt/power-off/reboot\n",
program_invocation_short_name,
arg_action == ACTION_REBOOT ? "Reboot" :
arg_action == ACTION_POWEROFF ? "Power off" :
"Halt");
return 0;
}
static int shutdown_help(void) {
printf("%s [OPTIONS...] [now] [WALL...]\n\n"
"Shut down the system.\n\n"
" --help Show this help\n"
" -H --halt Halt the machine\n"
" -P --poweroff Power-off the machine\n"
" -r --reboot Reboot the machine\n"
" -h Equivalent to --poweroff, overriden by --halt\n"
" -k Don't halt/power-off/reboot, just send warnings\n"
" --no-wall Don't send wall message before halt/power-off/reboot\n",
program_invocation_short_name);
return 0;
}
static int telinit_help(void) {
printf("%s [OPTIONS...] {COMMAND}\n\n"
"Send control commands to the init daemon.\n\n"
" --help Show this help\n"
" --no-wall Don't send wall message before halt/power-off/reboot\n\n"
"Commands:\n"
" 0 Power-off the machine\n"
" 6 Reboot the machine\n"
" 2, 3, 4, 5 Start runlevelX.target unit\n"
" 1, s, S Enter rescue mode\n"
" q, Q Reload init daemon configuration\n"
" u, U Reexecute init daemon\n",
program_invocation_short_name);
return 0;
}
static int runlevel_help(void) {
printf("%s [OPTIONS...]\n\n"
"Prints the previous and current runlevel of the init system.\n\n"
" --help Show this help\n",
program_invocation_short_name);
return 0;
}
static int systemctl_parse_argv(int argc, char *argv[]) {
enum {
ARG_REPLACE = 0x100,
ARG_SESSION,
ARG_SYSTEM,
ARG_NO_BLOCK,
ARG_NO_WALL
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "type", required_argument, NULL, 't' },
{ "property", required_argument, NULL, 'p' },
{ "all", no_argument, NULL, 'a' },
{ "replace", no_argument, NULL, ARG_REPLACE },
{ "session", no_argument, NULL, ARG_SESSION },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "no-block", no_argument, NULL, ARG_NO_BLOCK },
{ "no-wall", no_argument, NULL, ARG_NO_WALL },
{ "quiet", no_argument, NULL, 'q' },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "ht:p:aq", options, NULL)) >= 0) {
switch (c) {
case 'h':
systemctl_help();
return 0;
case 't':
arg_type = optarg;
break;
case 'p':
arg_property = optarg;
/* If the user asked for a particular
* property, show it to him, even if it is
* empty. */
arg_all = true;
break;
case 'a':
arg_all = true;
break;
case ARG_REPLACE:
arg_replace = true;
break;
case ARG_SESSION:
arg_session = true;
break;
case ARG_SYSTEM:
arg_session = false;
break;
case ARG_NO_BLOCK:
arg_no_block = true;
break;
case ARG_NO_WALL:
arg_no_wall = true;
break;
case 'q':
arg_quiet = true;
break;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
return 1;
}
static int halt_parse_argv(int argc, char *argv[]) {
enum {
ARG_HELP = 0x100,
ARG_HALT,
ARG_REBOOT,
ARG_NO_WALL
};
static const struct option options[] = {
{ "help", no_argument, NULL, ARG_HELP },
{ "halt", no_argument, NULL, ARG_HALT },
{ "poweroff", no_argument, NULL, 'p' },
{ "reboot", no_argument, NULL, ARG_REBOOT },
{ "force", no_argument, NULL, 'f' },
{ "wtmp-only", no_argument, NULL, 'w' },
{ "no-wtmp", no_argument, NULL, 'd' },
{ "no-sync", no_argument, NULL, 'n' },
{ "no-wall", no_argument, NULL, ARG_NO_WALL },
{ NULL, 0, NULL, 0 }
};
int c, runlevel;
assert(argc >= 0);
assert(argv);
if (utmp_get_runlevel(&runlevel, NULL) >= 0)
if (runlevel == '0' || runlevel == '6')
arg_immediate = true;
while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
switch (c) {
case ARG_HELP:
halt_help();
return 0;
case ARG_HALT:
arg_action = ACTION_HALT;
break;
case 'p':
arg_action = ACTION_POWEROFF;
break;
case ARG_REBOOT:
arg_action = ACTION_REBOOT;
break;
case 'f':
arg_immediate = true;
break;
case 'w':
arg_dry = true;
break;
case 'd':
arg_no_wtmp = true;
break;
case 'n':
arg_no_sync = true;
break;
case ARG_NO_WALL:
arg_no_wall = true;
break;
case 'i':
case 'h':
/* Compatibility nops */
break;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
if (optind < argc) {
log_error("Too many arguments.");
return -EINVAL;
}
return 1;
}
static int shutdown_parse_argv(int argc, char *argv[]) {
enum {
ARG_HELP = 0x100,
ARG_NO_WALL
};
static const struct option options[] = {
{ "help", no_argument, NULL, ARG_HELP },
{ "halt", no_argument, NULL, 'H' },
{ "poweroff", no_argument, NULL, 'P' },
{ "reboot", no_argument, NULL, 'r' },
{ "no-wall", no_argument, NULL, ARG_NO_WALL },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "HPrhkt:a", options, NULL)) >= 0) {
switch (c) {
case ARG_HELP:
shutdown_help();
return 0;
case 'H':
arg_action = ACTION_HALT;
break;
case 'P':
arg_action = ACTION_POWEROFF;
break;
case 'r':
arg_action = ACTION_REBOOT;
break;
case 'h':
if (arg_action != ACTION_HALT)
arg_action = ACTION_POWEROFF;
break;
case 'k':
arg_dry = true;
break;
case ARG_NO_WALL:
arg_no_wall = true;
break;
case 't':
case 'a':
/* Compatibility nops */
break;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
if (argc > optind && !streq(argv[optind], "now"))
log_warning("First argument '%s' isn't 'now'. Ignoring.", argv[optind]);
/* We ignore the time argument */
if (argc > optind + 1)
arg_wall = argv + optind + 1;
optind = argc;
return 1;
}
static int telinit_parse_argv(int argc, char *argv[]) {
enum {
ARG_HELP = 0x100,
ARG_NO_WALL
};
static const struct option options[] = {
{ "help", no_argument, NULL, ARG_HELP },
{ "no-wall", no_argument, NULL, ARG_NO_WALL },
{ NULL, 0, NULL, 0 }
};
static const struct {
char from;
enum action to;
} table[] = {
{ '0', ACTION_POWEROFF },
{ '6', ACTION_REBOOT },
{ '1', ACTION_RESCUE },
{ '2', ACTION_RUNLEVEL2 },
{ '3', ACTION_RUNLEVEL3 },
{ '4', ACTION_RUNLEVEL4 },
{ '5', ACTION_RUNLEVEL5 },
{ 's', ACTION_RESCUE },
{ 'S', ACTION_RESCUE },
{ 'q', ACTION_RELOAD },
{ 'Q', ACTION_RELOAD },
{ 'u', ACTION_REEXEC },
{ 'U', ACTION_REEXEC }
};
unsigned i;
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
switch (c) {
case ARG_HELP:
telinit_help();
return 0;
case ARG_NO_WALL:
arg_no_wall = true;
break;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
if (optind >= argc) {
telinit_help();
return -EINVAL;
}
if (optind + 1 < argc) {
log_error("Too many arguments.");
return -EINVAL;
}
if (strlen(argv[optind]) != 1) {
log_error("Expected single character argument.");
return -EINVAL;
}
for (i = 0; i < ELEMENTSOF(table); i++)
if (table[i].from == argv[optind][0])
break;
if (i >= ELEMENTSOF(table)) {
log_error("Unknown command %s.", argv[optind]);
return -EINVAL;
}
arg_action = table[i].to;
optind ++;
return 1;
}
static int runlevel_parse_argv(int argc, char *argv[]) {
enum {
ARG_HELP = 0x100,
};
static const struct option options[] = {
{ "help", no_argument, NULL, ARG_HELP },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
switch (c) {
case ARG_HELP:
runlevel_help();
return 0;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
if (optind < argc) {
log_error("Too many arguments.");
return -EINVAL;
}
return 1;
}
static int parse_argv(int argc, char *argv[]) {
assert(argc >= 0);
assert(argv);
if (program_invocation_short_name) {
if (strstr(program_invocation_short_name, "halt")) {
arg_action = ACTION_HALT;
return halt_parse_argv(argc, argv);
} else if (strstr(program_invocation_short_name, "poweroff")) {
arg_action = ACTION_POWEROFF;
return halt_parse_argv(argc, argv);
} else if (strstr(program_invocation_short_name, "reboot")) {
arg_action = ACTION_REBOOT;
return halt_parse_argv(argc, argv);
} else if (strstr(program_invocation_short_name, "shutdown")) {
arg_action = ACTION_POWEROFF;
return shutdown_parse_argv(argc, argv);
} else if (strstr(program_invocation_short_name, "init")) {
arg_action = ACTION_INVALID;
return telinit_parse_argv(argc, argv);
} else if (strstr(program_invocation_short_name, "runlevel")) {
arg_action = ACTION_RUNLEVEL;
return runlevel_parse_argv(argc, argv);
}
}
arg_action = ACTION_SYSTEMCTL;
return systemctl_parse_argv(argc, argv);
}
static int action_to_runlevel(void) {
static const char table[_ACTION_MAX] = {
[ACTION_HALT] = '0',
[ACTION_POWEROFF] = '0',
[ACTION_REBOOT] = '6',
[ACTION_RUNLEVEL2] = '2',
[ACTION_RUNLEVEL3] = '3',
[ACTION_RUNLEVEL4] = '4',
[ACTION_RUNLEVEL5] = '5',
[ACTION_RESCUE] = '1'
};
assert(arg_action < _ACTION_MAX);
return table[arg_action];
}
static int talk_upstart(void) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int previous, rl, r;
char
env1_buf[] = "RUNLEVEL=X",
env2_buf[] = "PREVLEVEL=X";
char *env1 = env1_buf, *env2 = env2_buf;
const char *emit = "runlevel";
dbus_bool_t b_false = FALSE;
DBusMessageIter iter, sub;
DBusConnection *bus;
dbus_error_init(&error);
if (!(rl = action_to_runlevel()))
return 0;
if (utmp_get_runlevel(&previous, NULL) < 0)
previous = 'N';
if (!(bus = dbus_connection_open("unix:abstract=/com/ubuntu/upstart", &error))) {
if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
r = 0;
goto finish;
}
log_error("Failed to connect to Upstart bus: %s", error.message);
r = -EIO;
goto finish;
}
if ((r = bus_check_peercred(bus)) < 0) {
log_error("Failed to verify owner of bus.");
goto finish;
}
if (!(m = dbus_message_new_method_call(
"com.ubuntu.Upstart",
"/com/ubuntu/Upstart",
"com.ubuntu.Upstart0_6",
"EmitEvent"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
dbus_message_iter_init_append(m, &iter);
env1_buf[sizeof(env1_buf)-2] = rl;
env2_buf[sizeof(env2_buf)-2] = previous;
if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
!dbus_message_iter_close_container(&iter, &sub) ||
!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
if (error_is_no_service(&error)) {
r = 0;
goto finish;
}
log_error("Failed to issue method call: %s", error.message);
r = -EIO;
goto finish;
}
r = 1;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
if (bus)
dbus_connection_unref(bus);
dbus_error_free(&error);
return r;
}
static int talk_initctl(void) {
struct init_request request;
int r, fd;
char rl;
if (!(rl = action_to_runlevel()))
return 0;
zero(request);
request.magic = INIT_MAGIC;
request.sleeptime = 0;
request.cmd = INIT_CMD_RUNLVL;
request.runlevel = rl;
if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
if (errno == ENOENT)
return 0;
log_error("Failed to open "INIT_FIFO": %m");
return -errno;
}
errno = 0;
r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
close_nointr_nofail(fd);
if (r < 0) {
log_error("Failed to write to "INIT_FIFO": %m");
return errno ? -errno : -EIO;
}
return 1;
}
static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
static const struct {
const char* verb;
const enum {
MORE,
LESS,
EQUAL
} argc_cmp;
const int argc;
int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
} verbs[] = {
{ "list-units", LESS, 1, list_units },
{ "list-jobs", EQUAL, 1, list_jobs },
{ "clear-jobs", EQUAL, 1, clear_jobs },
{ "load", MORE, 2, load_unit },
{ "cancel", MORE, 2, cancel_job },
{ "start", MORE, 2, start_unit },
{ "stop", MORE, 2, start_unit },
{ "reload", MORE, 2, start_unit },
{ "restart", MORE, 2, start_unit },
{ "isolate", EQUAL, 2, start_unit },
{ "check", MORE, 2, check_unit },
{ "show", MORE, 1, show },
{ "status", MORE, 2, show },
{ "monitor", EQUAL, 1, monitor },
{ "dump", EQUAL, 1, dump },
{ "snapshot", LESS, 2, snapshot },
{ "delete", MORE, 2, delete_snapshot },
{ "daemon-reload", EQUAL, 1, clear_jobs },
{ "daemon-reexec", EQUAL, 1, clear_jobs },
{ "daemon-exit", EQUAL, 1, clear_jobs },
{ "show-environment", EQUAL, 1, show_enviroment },
{ "set-environment", MORE, 2, set_environment },
{ "unset-environment", MORE, 2, set_environment },
{ "halt", EQUAL, 1, start_special },
{ "poweroff", EQUAL, 1, start_special },
{ "reboot", EQUAL, 1, start_special },
{ "default", EQUAL, 1, start_special },
{ "rescue", EQUAL, 1, start_special },
{ "emergency", EQUAL, 1, start_special },
};
int left;
unsigned i;
assert(bus);
assert(argc >= 0);
assert(argv);
left = argc - optind;
if (left <= 0)
/* Special rule: no arguments means "list-units" */
i = 0;
else {
if (streq(argv[optind], "help")) {
systemctl_help();
return 0;
}
for (i = 0; i < ELEMENTSOF(verbs); i++)
if (streq(argv[optind], verbs[i].verb))
break;
if (i >= ELEMENTSOF(verbs)) {
log_error("Unknown operation %s", argv[optind]);
return -EINVAL;
}
}
switch (verbs[i].argc_cmp) {
case EQUAL:
if (left != verbs[i].argc) {
log_error("Invalid number of arguments.");
return -EINVAL;
}
break;
case MORE:
if (left < verbs[i].argc) {
log_error("Too few arguments.");
return -EINVAL;
}
break;
case LESS:
if (left > verbs[i].argc) {
log_error("Too many arguments.");
return -EINVAL;
}
break;
default:
assert_not_reached("Unknown comparison operator.");
}
return verbs[i].dispatch(bus, argv + optind, left);
}
static int reload_with_fallback(DBusConnection *bus) {
int r;
if (bus) {
/* First, try systemd via D-Bus. */
if ((r = clear_jobs(bus, NULL, 0)) > 0)
return 0;
}
/* Nothing else worked, so let's try signals */
assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
log_error("kill() failed: %m");
return -errno;
}
return 0;
}
static int start_with_fallback(DBusConnection *bus) {
int r;
warn_wall(arg_action);
if (bus) {
/* First, try systemd via D-Bus. */
if ((r = start_unit(bus, NULL, 0)) > 0)
return 0;
/* Hmm, talking to systemd via D-Bus didn't work. Then
* let's try to talk to Upstart via D-Bus. */
if ((r = talk_upstart()) > 0)
return 0;
}
/* Nothing else worked, so let's try
* /dev/initctl */
if ((r = talk_initctl()) != 0)
return 0;
log_error("Failed to talk to init daemon.");
return -EIO;
}
static int halt_main(DBusConnection *bus) {
int r;
if (!arg_immediate)
return start_with_fallback(bus);
if (!arg_no_wtmp)
if ((r = utmp_put_shutdown(0)) < 0)
log_warning("Failed to write utmp record: %s", strerror(-r));
if (!arg_no_sync)
sync();
if (arg_dry)
return 0;
/* Make sure C-A-D is handled by the kernel from this
* point on... */
reboot(RB_ENABLE_CAD);
switch (arg_action) {
case ACTION_HALT:
log_info("Halting");
reboot(RB_HALT_SYSTEM);
break;
case ACTION_POWEROFF:
log_info("Powering off");
reboot(RB_POWER_OFF);
break;
case ACTION_REBOOT:
log_info("Rebooting");
reboot(RB_AUTOBOOT);
break;
default:
assert_not_reached("Unknown halt action.");
}
/* We should never reach this. */
return -ENOSYS;
}
static int runlevel_main(void) {
int r, runlevel, previous;
if ((r = utmp_get_runlevel(&runlevel, &previous)) < 0) {
printf("unknown");
return r;
}
printf("%c %c\n",
previous <= 0 ? 'N' : previous,
runlevel <= 0 ? 'N' : runlevel);
return 0;
}
int main(int argc, char*argv[]) {
int r, retval = 1;
DBusConnection *bus = NULL;
DBusError error;
dbus_error_init(&error);
log_parse_environment();
if ((r = parse_argv(argc, argv)) < 0)
goto finish;
else if (r == 0) {
retval = 0;
goto finish;
}
/* /sbin/runlevel doesn't need to communicate via D-Bus, so
* let's shortcut this */
if (arg_action == ACTION_RUNLEVEL) {
retval = runlevel_main() < 0;
goto finish;
}
bus_connect(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &bus, &private_bus, &error);
switch (arg_action) {
case ACTION_SYSTEMCTL: {
if (!bus) {
log_error("Failed to get D-Bus connection: %s", error.message);
goto finish;
}
retval = systemctl_main(bus, argc, argv) < 0;
break;
}
case ACTION_HALT:
case ACTION_POWEROFF:
case ACTION_REBOOT:
retval = halt_main(bus) < 0;
break;
case ACTION_RUNLEVEL2:
case ACTION_RUNLEVEL3:
case ACTION_RUNLEVEL4:
case ACTION_RUNLEVEL5:
case ACTION_RESCUE:
case ACTION_EMERGENCY:
case ACTION_DEFAULT:
retval = start_with_fallback(bus) < 0;
break;
case ACTION_RELOAD:
case ACTION_REEXEC:
retval = reload_with_fallback(bus) < 0;
break;
case ACTION_INVALID:
case ACTION_RUNLEVEL:
default:
assert_not_reached("Unknown action");
}
finish:
if (bus)
dbus_connection_unref(bus);
dbus_error_free(&error);
dbus_shutdown();
return retval;
}
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