diff -r -u -N --exclude='*.orig' fetchmail-6.3.11.orig/env.c fetchmail-6.3.11/env.c --- fetchmail-6.3.11.orig/env.c 2009-06-15 00:09:42.000000000 -0700 +++ fetchmail-6.3.11/env.c 2009-09-25 10:12:33.000000000 -0700 @@ -48,6 +48,12 @@ } } + if (argv[0] == NULL) + { + fprintf(stderr, "fetchmail: bad program name\n"); + exit(PS_UNDEFINED); + } + if ((program_name = strrchr(argv[0], '/')) != NULL) ++program_name; else