6 #include <sys/socket.h>
10 #include <X11/Xauth.h>
24 #define GDM_PROTOCOL_SOCKET_PATH1 "/var/run/gdm_socket"
25 #define GDM_PROTOCOL_SOCKET_PATH2 "/tmp/.gdm_socket"
27 #define GDM_PROTOCOL_MSG_CLOSE "CLOSE"
28 #define GDM_PROTOCOL_MSG_VERSION "VERSION"
29 #define GDM_PROTOCOL_MSG_AUTHENTICATE "AUTH_LOCAL"
30 #define GDM_PROTOCOL_MSG_QUERY_ACTION "QUERY_LOGOUT_ACTION"
31 #define GDM_PROTOCOL_MSG_SET_ACTION "SET_SAFE_LOGOUT_ACTION"
32 #define GDM_PROTOCOL_MSG_FLEXI_XSERVER "FLEXI_XSERVER"
34 #define GDM_ACTION_STR_NONE GDM_PROTOCOL_MSG_SET_ACTION" NONE"
35 #define GDM_ACTION_STR_SHUTDOWN GDM_PROTOCOL_MSG_SET_ACTION" HALT"
36 #define GDM_ACTION_STR_REBOOT GDM_PROTOCOL_MSG_SET_ACTION" REBOOT"
37 #define GDM_ACTION_STR_SUSPEND GDM_PROTOCOL_MSG_SET_ACTION" SUSPEND"
39 #define GDM_MIT_MAGIC_COOKIE_LEN 16
43 static void gdm_disconnect()
50 static char* get_display_number(void)
56 display_name = XDisplayName(NULL);
58 p = strchr(display_name, ':');
60 return g_strdup ("0");
62 while (*p == ':') p++;
64 retval = g_strdup (p);
66 p = strchr (retval, '.');
73 static char* gdm_send_protocol_msg (const char *msg)
80 p = g_strconcat(msg, "\n", NULL);
81 if (write (fd, p, strlen(p)) < 0) {
84 g_warning ("Failed to send message to GDM: %s",
92 while ((len = read(fd, buf, sizeof(buf) - 1)) > 0) {
96 retval = g_string_new(buf);
98 retval = g_string_append(retval, buf);
100 if ((p = strchr(retval->str, '\n')))
106 return retval ? g_string_free(retval, FALSE) : NULL;
109 static gboolean gdm_authenticate()
113 const char *xau_path;
114 char *display_number;
117 if (!(xau_path = XauFileName()))
120 if (!(f = fopen(xau_path, "r")))
124 display_number = get_display_number();
126 while ((xau = XauReadAuth(f))) {
127 char buffer[40]; /* 2*16 == 32, so 40 is enough */
132 if (xau->family != FamilyLocal ||
133 strncmp (xau->number, display_number, xau->number_length) ||
134 strncmp (xau->name, "MIT-MAGIC-COOKIE-1", xau->name_length) ||
135 xau->data_length != GDM_MIT_MAGIC_COOKIE_LEN)
141 for (i = 0; i < GDM_MIT_MAGIC_COOKIE_LEN; i++)
142 g_snprintf(buffer + 2*i, 3, "%02x", (guint)(guchar)xau->data[i]);
146 msg = g_strdup_printf(GDM_PROTOCOL_MSG_AUTHENTICATE " %s", buffer);
147 response = gdm_send_protocol_msg(msg);
150 if (response && !strcmp(response, "OK")) {
151 /*auth_cookie = g_strdup(buffer);*/
164 static gboolean gdm_connect()
166 struct sockaddr_un addr;
171 fd = socket(AF_UNIX, SOCK_STREAM, 0);
173 g_warning("Failed to create GDM socket: %s", g_strerror (errno));
178 if (g_file_test(GDM_PROTOCOL_SOCKET_PATH1, G_FILE_TEST_EXISTS))
179 strcpy(addr.sun_path, GDM_PROTOCOL_SOCKET_PATH1);
181 strcpy(addr.sun_path, GDM_PROTOCOL_SOCKET_PATH2);
183 addr.sun_family = AF_UNIX;
185 if (connect(fd, (struct sockaddr *) &addr, sizeof (addr)) < 0) {
186 g_warning("Failed to establish a connection with GDM: %s",
192 response = gdm_send_protocol_msg(GDM_PROTOCOL_MSG_VERSION);
193 if (!response || strncmp(response, "GDM ", strlen("GDM ") != 0)) {
196 g_warning("Failed to get protocol version from GDM");
202 if (!gdm_authenticate()) {
203 g_warning("Failed to authenticate with GDM");
211 int main(int argc, char **argv)
216 for (i = 1; i < argc; ++i) {
217 if (!strcmp(argv[i], "--help")) {
221 if (!strcmp(argv[i], "--none")) {
225 if (!strcmp(argv[i], "--shutdown")) {
229 if (!strcmp(argv[i], "--reboot")) {
233 if (!strcmp(argv[i], "--suspend")) {
237 if (!strcmp(argv[i], "--switch-user")) {
244 printf("Usage: gdm-control ACTION\n\n");
245 printf("Actions:\n");
246 printf(" --help Display this help and exit\n");
247 printf(" --none Do nothing special when the current session ends\n");
248 printf(" --shutdown Shutdown the computer when the current session ends\n");
249 printf(" --reboot Reboot the computer when the current session ends\n");
250 printf(" --suspend Suspend the computer when the current session ends\n");
251 printf(" --switch-user Log in as a new user (this works immediately)\n\n");
257 const char *action_string;
259 d = XDisplayName(NULL);
262 "Unable to find the X display specified by the DISPLAY "
263 "environment variable. Ensure that it is set correctly.");
269 action_string = GDM_ACTION_STR_NONE;
272 action_string = GDM_ACTION_STR_SHUTDOWN;
275 action_string = GDM_ACTION_STR_REBOOT;
278 action_string = GDM_ACTION_STR_SUSPEND;
281 action_string = GDM_PROTOCOL_MSG_FLEXI_XSERVER;
288 response = gdm_send_protocol_msg(action_string);