[PATCH] more extras/multipath updates

* Adds a /var/run/multipath.run handling to avoid simultaneous runs.
* Remove a commented-out "printf"

diff --git a/extras/multipath/main.c b/extras/multipath/main.c
index f3f92e7eba6dbdd617a860bfca132680696e49b2..9bceb265ba1fe4a2e1cf48b1f67868fde79e0d96 100644 (file)
--- a/extras/multipath/main.c
+++ b/extras/multipath/main.c
@@ -660,9 +660,19 @@ usage(char * progname)
        exit(1);
 }
 
+static int
+running(char * run) {
+       struct stat buf;
+
+       if(!stat(run, &buf))
+               return 1;
+       return 0;
+}
+
 int
 main(int argc, char *argv[])
 {
+       char * run = "/var/run/multipath.run";
        struct multipath * mp;
        struct path * all_paths;
        struct scsi_dev * all_scsi_ids;
@@ -705,12 +715,26 @@ main(int argc, char *argv[])
 
        }
 
+       if (running(run)) {
+               if (conf.verbose) {
+                       fprintf(stderr, "Already running.\n");
+                       fprintf(stderr, "If you know what you do, please ");
+                       fprintf(stderr, "remove %s\n", run);
+               }
+               return 1;
+       }
+
+       if(!open(run, O_CREAT))
+               exit(1);
+
        /* dynamic allocations */
        mp = malloc(conf.max_devs * sizeof(struct multipath));
        all_paths = malloc(conf.max_devs * sizeof(struct path));
        all_scsi_ids = malloc(conf.max_devs * sizeof(struct scsi_dev));
-       if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL)
+       if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL) {
+               unlink(run);
                exit(1);
+       }
 
        if (!conf.with_sysfs) {
                get_all_scsi_ids(&conf, all_scsi_ids);
@@ -725,11 +749,12 @@ main(int argc, char *argv[])
                fprintf(stdout, "\n");
                print_all_mp(all_paths, mp, nmp);
                fprintf(stdout, "\n");
-               //printf("\n");
        }
 
-       if (conf.dry_run)
+       if (conf.dry_run) {
+               unlink(run);
                exit(0);
+       }
 
        for (k=0; k<=nmp; k++) {
                if (map_present(mp[k].wwid)) {
@@ -738,5 +763,6 @@ main(int argc, char *argv[])
                        add_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
                }
        }
+       unlink(run);
        exit(0);
 }