--- /lockfile-progs.orig.c	2007-10-11 10:32:09.000000000 -0300
+++ /lockfile-progs.c	2007-10-11 10:32:28.000000000 -0300
@@ -93,7 +93,7 @@
     { NULL, 0, NULL, 0 }
   };
 
-  char *cmd_name = rindex(argv[0], '/');
+  char *cmd_name = strrchr(argv[0], '/');
   int mail_cmd_p = 0;
 
   if(cmd_name != NULL) {