From 54652230d4f22f17a00a96493721c0688c838cd0 Mon Sep 17 00:00:00 2001
From: Matt Kraai
Date: Wed, 18 Apr 2001 15:51:45 +0000
Subject: Eliminate a segfault when called on an existing file with out an
 extension: touch foo && gunzip foo

---
 archival/gunzip.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'archival/gunzip.c')

diff --git a/archival/gunzip.c b/archival/gunzip.c
index c3960e9..65f4356 100644
--- a/archival/gunzip.c
+++ b/archival/gunzip.c
@@ -158,9 +158,9 @@ extern int gunzip_main(int argc, char **argv)
 
 		delete_old_file = TRUE;
 		extension = strrchr(if_name, '.');
-		if (strcmp(extension, ".gz") == 0) {
+		if (extension && strcmp(extension, ".gz") == 0) {
 			length -= 3;
-		} else if (strcmp(extension, ".tgz") == 0) {
+		} else if (extension && strcmp(extension, ".tgz") == 0) {
 			length -= 4;
 		} else {
 			error_msg_and_die("Invalid extension");
-- 
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