add Usage: to udevmonitor and udevcontrol

[elogind.git] / udevcontrol.c

diff --git a/udevcontrol.c b/udevcontrol.c
index 5d8fa77683eeee2455e378ff6f142a9cc7df9efe..f16f6a125ab40d96b1190f06ee1d4fe933a6638a 100644 (file)
--- a/udevcontrol.c
+++ b/udevcontrol.c
@@ -64,6 +64,7 @@ int main(int argc, char *argv[], char *envp[])
        const char *env;
        const char *val;
        int *intval;
+       int i;
        int retval = 1;
 
        env = getenv("UDEV_LOG");
@@ -73,33 +74,50 @@ int main(int argc, char *argv[], char *envp[])
        logging_init("udevcontrol");
        dbg("version %s", UDEV_VERSION);
 
-       if (argc != 2) {
-               err("error finding comand");
+       if (argc < 2) {
+               fprintf(stderr, "missing command\n\n");
                goto exit;
        }
 
        memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
        strcpy(usend_msg.magic, UDEV_MAGIC);
 
-       if (!strcmp(argv[1], "stop_exec_queue"))
-               usend_msg.type = UDEVD_STOP_EXEC_QUEUE;
-       else if (!strcmp(argv[1], "start_exec_queue"))
-               usend_msg.type = UDEVD_START_EXEC_QUEUE;
-       else if (!strncmp(argv[1], "log_priority=", strlen("log_priority="))) {
-               intval = (int *) usend_msg.envbuf;
-               val = &argv[1][strlen("log_priority=")];
-               usend_msg.type = UDEVD_SET_LOG_LEVEL;
-               *intval = log_priority(val);
-               info("send log_priority=%i", *intval);
-       } else if (!strncmp(argv[1], "max_childs=", strlen("max_childs="))) {
-               intval = (int *) usend_msg.envbuf;
-               val = &argv[1][strlen("max_childs=")];
-               usend_msg.type = UDEVD_SET_MAX_CHILDS;
-               *intval = atoi(val);
-               info("send max_childs=%i", *intval);
-       } else {
-               err("error parsing command\n");
-               goto exit;
+       for (i = 1 ; i < argc; i++) {
+               char *arg = argv[i];
+
+               if (!strcmp(arg, "stop_exec_queue"))
+                       usend_msg.type = UDEVD_STOP_EXEC_QUEUE;
+               else if (!strcmp(arg, "start_exec_queue"))
+                       usend_msg.type = UDEVD_START_EXEC_QUEUE;
+               else if (!strncmp(arg, "log_priority=", strlen("log_priority="))) {
+                       intval = (int *) usend_msg.envbuf;
+                       val = &arg[strlen("log_priority=")];
+                       usend_msg.type = UDEVD_SET_LOG_LEVEL;
+                       *intval = log_priority(val);
+                       info("send log_priority=%i", *intval);
+               } else if (!strncmp(arg, "max_childs=", strlen("max_childs="))) {
+                       intval = (int *) usend_msg.envbuf;
+                       val = &arg[strlen("max_childs=")];
+                       usend_msg.type = UDEVD_SET_MAX_CHILDS;
+                       *intval = atoi(val);
+                       info("send max_childs=%i", *intval);
+               } else if (strcmp(arg, "help") == 0  || strcmp(arg, "--help") == 0  || strcmp(arg, "-h") == 0) {
+                       printf("Usage: udevcontrol COMMAND\n"
+                               "  log_priority=<level> set the udev log level for the daemon\n"
+                               "  stop_exec_queue      keep udevd from executing events, queue only\n"
+                               "  start_exec_queue     execute events, flush queue\n"
+                               "  max_childs=<N>       maximum number of childs running at the same time\n"
+                               "  --help               print this help text\n\n");
+                       exit(0);
+               } else {
+                       fprintf(stderr, "unknown option\n\n");
+                       exit(1);
+               }
+       }
+
+       if (getuid() != 0) {
+               fprintf(stderr, "need to be root, exit\n\n");
+               exit(1);
        }
 
        sock = socket(AF_LOCAL, SOCK_DGRAM, 0);