udevadm: settle - add --exit-if-exists=<file>

diff --git a/udev/udevadm-settle.c b/udev/udevadm-settle.c
index 9059adc341a59482834a681cb76e059b3e98209d..0b3f2e21246d7b3a5e6edd5a810b571fec716792 100644 (file)
--- a/udev/udevadm-settle.c
+++ b/udev/udevadm-settle.c
@@ -54,6 +54,7 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
                { "seq-start", required_argument, NULL, 's' },
                { "seq-end", required_argument, NULL, 'e' },
                { "timeout", required_argument, NULL, 't' },
+               { "exit-if-exists", required_argument, NULL, 'E' },
                { "quiet", no_argument, NULL, 'q' },
                { "help", no_argument, NULL, 'h' },
                {}
@@ -61,6 +62,7 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
        unsigned long long start = 0;
        unsigned long long end = 0;
        int quiet = 0;
+       const char *exists = NULL;
        int timeout = DEFAULT_TIMEOUT;
        struct sigaction act;
        struct udev_queue *udev_queue = NULL;
@@ -80,7 +82,7 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
                int option;
                int seconds;
 
-               option = getopt_long(argc, argv, "s:e:t:qh", options, NULL);
+               option = getopt_long(argc, argv, "s:e:t:E:qh", options, NULL);
                if (option == -1)
                        break;
 
@@ -102,12 +104,16 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
                case 'q':
                        quiet = 1;
                        break;
+               case 'E':
+                       exists = optarg;
+                       break;
                case 'h':
                        printf("Usage: udevadm settle OPTIONS\n"
-                              "  --timeout=<seconds>   maximum time to wait for events\n"
-                              "  --seq-start=<seqnum>  first seqnum to wait for\n"
-                              "  --seq-end=<seqnum>    last seqnum to wait for\n"
-                              "  --quiet               do not print list after timeout\n"
+                              "  --timeout=<seconds>     maximum time to wait for events\n"
+                              "  --seq-start=<seqnum>    first seqnum to wait for\n"
+                              "  --seq-end=<seqnum>      last seqnum to wait for\n"
+                              "  --exit-if-exists=<file> stop waiting if file exists\n"
+                              "  --quiet                 do not print list after timeout\n"
                               "  --help\n\n");
                        exit(0);
                }
@@ -173,6 +179,13 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
        }
 
        while (1) {
+               struct stat statbuf;
+
+               if (exists != NULL && stat(exists, &statbuf) == 0) {
+                       rc = 0;
+                       break;
+               }
+
                if (start > 0) {
                        /* if asked for, wait for a specific sequence of events */
                        if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) {

diff --git a/udev/udevadm.xml b/udev/udevadm.xml
index 5996c013838d65f4facca6ba95f3fb2bdc72da5e..538180babeae16b28e9ed9b3f35ac5c70f20a2f0 100644 (file)
--- a/udev/udevadm.xml
+++ b/udev/udevadm.xml
@@ -236,6 +236,12 @@
                 <para>Wait only for events before the given sequence number.</para>
               </listitem>
             </varlistentry>
+            <varlistentry>
+              <term><option>--exit-if-exists=<replaceable>file</replaceable></option></term>
+              <listitem>
+                <para>Stop waiting if file exists.</para>
+              </listitem>
+            </varlistentry>
             <varlistentry>
               <term><option>--quiet</option></term>
               <listitem>