udevd: add --debug-trace option

[elogind.git] / udevd.c

diff --git a/udevd.c b/udevd.c
index df6e2228106173db10212ee025cb1184bb633f6b..3adedac0807b722cd9c9b38dc665387feff33de0 100644 (file)
--- a/udevd.c
+++ b/udevd.c
@@ -45,6 +45,9 @@
 #include "udevd.h"
 #include "udev_selinux.h"
 
+static int debug_trace;
+static int verbose;
+
 static struct udev_rules rules;
 static int udevd_sock = -1;
 static int uevent_netlink_sock = -1;
@@ -76,6 +79,13 @@ void log_message(int priority, const char *format, ...)
        va_start(args, format);
        vsyslog(priority, format, args);
        va_end(args);
+
+       if (verbose) {
+               va_start(args, format);
+               vprintf(format, args);
+               va_end(args);
+               printf("\n");
+       }
 }
 
 #endif
@@ -298,6 +308,15 @@ static void msg_queue_insert(struct udevd_uevent_msg *msg)
 
        export_event_state(msg, EVENT_QUEUED);
 
+       /* run one event after the other in debug mode */
+       if (debug_trace) {
+               list_add_tail(&msg->node, &running_list);
+               udev_event_run(msg);
+               waitpid(msg->pid, NULL, 0);
+               msg_queue_delete(msg);
+               return;
+       }
+
        /* run all events with a timeout set immediately */
        if (msg->timeout != 0) {
                list_add_tail(&msg->node, &running_list);
@@ -921,6 +940,8 @@ int main(int argc, char *argv[], char *envp[])
        int option;
        static const struct option options[] = {
                { "daemon", 0, NULL, 'd' },
+               { "debug-trace", 0, NULL, 't' },
+               { "verbose", 0, NULL, 'v' },
                { "help", 0, NULL, 'h' },
                {}
        };
@@ -942,8 +963,16 @@ int main(int argc, char *argv[], char *envp[])
                case 'd':
                        daemonize = 1;
                        break;
+               case 't':
+                       debug_trace = 1;
+                       break;
+               case 'v':
+                       verbose = 1;
+                       if (udev_log_priority < LOG_INFO)
+                               udev_log_priority = LOG_INFO;
+                       break;
                case 'h':
-                       printf("Usage: udevd [--help] [--daemon]\n");
+                       printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--verbose]\n");
                        goto exit;
                default:
                        goto exit;
@@ -1006,7 +1035,8 @@ int main(int argc, char *argv[], char *envp[])
        fd = open("/dev/null", O_RDWR);
        if (fd >= 0) {
                dup2(fd, STDIN_FILENO);
-               dup2(fd, STDOUT_FILENO);
+               if (!verbose)
+                       dup2(fd, STDOUT_FILENO);
                dup2(fd, STDERR_FILENO);
                if (fd > STDERR_FILENO)
                        close(fd);
@@ -1112,6 +1142,8 @@ int main(int argc, char *argv[], char *envp[])
        /* export log_priority , as called programs may want to follow that setting */
        sprintf(udev_log, "UDEV_LOG=%i", udev_log_priority);
        putenv(udev_log);
+       if (debug_trace)
+               putenv("DEBUG=1");
 
        maxfd = udevd_sock;
        maxfd = UDEV_MAX(maxfd, uevent_netlink_sock);