Factor common code into new "start_mdmon".

[thirdparty/mdadm.git] / util.c

diff --git a/util.c b/util.c
index 0c1dfeebfa94ca96b56ee3a1e2fb6d5226fd38af..da61a0be60048a2ea7da3aeb6d1a2dc6471f5d48 100644 (file)
--- a/util.c
+++ b/util.c
@@ -1074,6 +1074,41 @@ int signal_mdmon(int devnum)
        return 0;
 }
 
+int start_mdmon(int devnum)
+{
+       int i;
+
+       if (env_no_mdmon())
+               return 0;
+
+       switch(fork()) {
+       case 0:
+               /* FIXME yuk. CLOSE_EXEC?? */
+               for (i=3; i < 100; i++)
+                       close(i);
+               execl("./mdmon", "mdmon",
+                     map_dev(dev2major(devnum),
+                             dev2minor(devnum),
+                             1), NULL);
+               exit(1);
+       case -1: fprintf(stderr, Name ": cannot run mdmon. "
+                        "Array remains readonly\n");
+               return -1;
+       default: ; /* parent - good */
+       }
+       return 0;
+}
+
+int env_no_mdmon(void)
+{
+       char *val = getenv("MDADM_NO_MDMON");
+
+       if (val && atoi(val) == 1)
+               return 1;
+
+       return 0;
+}
+
 
 int flush_metadata_updates(struct supertype *st)
 {