From ef8b112d77c3a05f17fa108d93d44d9a66902853 Mon Sep 17 00:00:00 2001
From: Matt Kraai <kraai@debian.org>
Date: Fri, 22 Mar 2002 22:55:51 +0000
Subject: [PATCH] * archival/gzip.c (gzip_main): Ensure that the output is a
 terminal and use   error_msg to display the error message.

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

diff --git a/archival/gzip.c b/archival/gzip.c
index fed93907b..44b5fe386 100644
--- a/archival/gzip.c
+++ b/archival/gzip.c
@@ -1312,8 +1312,8 @@ int gzip_main(int argc, char **argv)
 					outFileNum = STDOUT_FILENO;
 			}
 
-			if (path == NULL && force == 0) {
-				perror_msg("compressed data not written to a terminal. Use -f to force compression.");
+			if (path == NULL && isatty(outFileNum) && force == 0) {
+				error_msg("compressed data not written to a terminal. Use -f to force compression.");
 				free(path);
 				continue;
 			}