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authorEric Andersen <andersen@codepoet.org>2003-03-28 16:54:14 +0000
committerEric Andersen <andersen@codepoet.org>2003-03-28 16:54:14 +0000
commitb5b5ac32372c19b0776dceec67c9ed876b8616d3 (patch)
treeea1b896f1e2ed6781e8f30cad0e24ce3d62f4b74
parenta0f0f0cf76458ed2e2cb6cb5fe5425bd7322775d (diff)
downloadbusybox-b5b5ac32372c19b0776dceec67c9ed876b8616d3.tar.gz
trivial fix to make sure we have sufficient arguments before
we mess with a possibly non-existant argv[1] -Erik
-rw-r--r--coreutils/tail.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c
index 8e0adf5b5..10b5cd7a7 100644
--- 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;