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authorLennart Poettering <lennart@poettering.net>2010-06-18 19:16:14 +0200
committerLennart Poettering <lennart@poettering.net>2010-06-18 19:16:14 +0200
commitd55ae9e6d7a20bb79f60a154bfcf4348dfb06852 (patch)
tree900f39bc680bce6a9e888501f217988c224f89dd /src
parentddb26e1818f67c2b97313d2ccf7468b2240ec086 (diff)
systemctl: add compat support for shutting down the system via upstart
Diffstat (limited to 'src')
-rw-r--r--src/systemctl.c109
1 files changed, 98 insertions, 11 deletions
diff --git a/src/systemctl.c b/src/systemctl.c
index ec92504f42..447a24458a 100644
--- a/src/systemctl.c
+++ b/src/systemctl.c
@@ -1893,12 +1893,7 @@ static int parse_argv(int argc, char *argv[]) {
return systemctl_parse_argv(argc, argv);
}
-static int talk_upstart(DBusConnection *bus) {
- log_error("Talking upstart");
- return 0;
-}
-
-static int talk_initctl(void) {
+static int action_to_runlevel(void) {
static const char table[_ACTION_MAX] = {
[ACTION_HALT] = '0',
@@ -1911,26 +1906,114 @@ static int talk_initctl(void) {
[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 (!table[arg_action])
+ if (!(rl = action_to_runlevel()))
return 0;
zero(request);
request.magic = INIT_MAGIC;
request.sleeptime = 0;
request.cmd = INIT_CMD_RUNLVL;
- request.runlevel = table[arg_action];
+ request.runlevel = rl;
+
+ if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
+
+ if (errno == ENOENT)
+ return 0;
- if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 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)
+ if (r < 0) {
+ log_error("Failed to write to "INIT_FIFO": %m");
return errno ? -errno : -EIO;
+ }
return 1;
}
@@ -2068,7 +2151,11 @@ static int start_with_fallback(DBusConnection *bus) {
/* Nothing else worked, so let's try
* /dev/initctl */
- return talk_initctl();
+ if ((r = talk_initctl()) != 0)
+ return 0;
+
+ log_error("Failed to talk to init daemon.");
+ return -EIO;
}
static int halt_main(DBusConnection *bus) {