#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
+#include <sys/socket.h>
#include <dbus/dbus.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;
return 0;
}
+static int bus_check_peercred(DBusConnection *c) {
+ int fd;
+ struct ucred ucred;
+ socklen_t l;
+
+ assert(c);
+
+ assert_se(dbus_connection_get_unix_fd(c, &fd));
+
+ l = sizeof(struct ucred);
+ if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0) {
+ log_error("SO_PEERCRED failed: %m");
+ return -errno;
+ }
+
+ if (l != sizeof(struct ucred)) {
+ log_error("SO_PEERCRED returned wrong size.");
+ return -E2BIG;
+ }
+
+ if (ucred.uid != 0)
+ return -EPERM;
+
+ return 1;
+}
+
static int columns(void) {
static int parsed_columns = 0;
const char *e;
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;
" dump Dump server status\n"
" snapshot [NAME] Create a snapshot\n"
" daemon-reload Reload init daemon configuration\n"
- " daemon-reexecute Reexecute init daemon\n"
+ " daemon-reexec 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"
static int shutdown_help(void) {
- printf("%s [options] [IGNORED] [WALL...]\n\n"
+ printf("%s [options] [now] [WALL...]\n\n"
"Shut down the system.\n\n"
" --help Show this help\n"
" -H --halt Halt the machine\n"
}
}
+ 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[]) {
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',
[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 (!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;
}
/* 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)
+ if ((r = talk_upstart()) > 0)
return 0;
}
/* 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) {
goto finish;
}
- if ((bus = dbus_bus_get(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error)))
+ /* If we are root, then let's not go via the bus */
+ if (geteuid() == 0 && !arg_session) {
+ bus = dbus_connection_open("unix:abstract=/org/freedesktop/systemd1/private", &error);
+
+ if (bus && bus_check_peercred(bus) < 0) {
+ log_error("Failed to verify owner of bus.");
+ goto finish;
+ }
+ } else
+ bus = dbus_bus_get(arg_session ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error);
+
+ if (bus)
dbus_connection_set_exit_on_disconnect(bus, FALSE);
switch (arg_action) {
~ianmdlvl / elogind.git / blobdiff