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[thirdparty/mdadm.git] / lib.c

diff --git a/lib.c b/lib.c
index 8285f346c25e2fe4254ab851b43e43c2ae6a7b16..6808f62d77ced0d6b044f48fa43a9b289f55b16b 100644 (file)
--- a/lib.c
+++ b/lib.c
@@ -58,6 +58,32 @@ static int mdp_major = -1;
        return mdp_major;
 }
 
+char *devid2kname(int devid)
+{
+       char path[30];
+       char link[200];
+       static char devnm[32];
+       char *cp;
+       int n;
+
+       /* Look at the
+        * /sys/dev/block/%d:%d link which must look like
+        * and take the last component.
+        */
+       sprintf(path, "/sys/dev/block/%d:%d", major(devid),
+               minor(devid));
+       n = readlink(path, link, sizeof(link)-1);
+       if (n > 0) {
+               link[n] = 0;
+               cp = strrchr(link, '/');
+               if (cp) {
+                       strcpy(devnm, cp+1);
+                       return devnm;
+               }
+       }
+       return NULL;
+}
+
 char *devid2devnm(int devid)
 {
        char path[30];