trivial fix to make sure we have sufficient arguments before

we mess with a possibly non-existant argv[1]
 -Erik

diff --git a/coreutils/tail.c b/coreutils/tail.c
index 8e0adf5b5c5e927ee71a8c40450bee962be875f8..10b5cd7a7d120c3a38351827e50ae35a64d232cf 100644 (file)
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -118,11 +118,10 @@ int tail_main(int argc, char **argv)
        const char *fmt;
 
        /* Allow legacy syntax of an initial numeric option without -n. */
-       if ((argv[1][0] == '+')
-               || ((argv[1][0] == '-')
+       if (argc >=2 && ((argv[1][0] == '+') || ((argv[1][0] == '-')
                        /* && (isdigit)(argv[1][1]) */
-                       && (((unsigned int)(argv[1][1] - '0')) <= 9))
-               ) {
+                       && (((unsigned int)(argv[1][1] - '0')) <= 9)))) 
+       {
                optind = 2;
                optarg = argv[1];
                goto GET_COUNT;