tests: avoid failure when running with no tty

[debian/gzip] / zip.c

diff --git a/zip.c b/zip.c
index 793cf4257f33a4176d64caad846591de70a3a225..eb5661ff85e0806fbd8b087ebd07290938c37c0e 100644 (file)
--- a/zip.c
+++ b/zip.c
@@ -1,6 +1,6 @@
 /* zip.c -- compress files to the gzip or pkzip format
 
-   Copyright (C) 1997-1999, 2006-2007, 2009-2016 Free Software Foundation, Inc.
+   Copyright (C) 1997-1999, 2006-2007, 2009-2017 Free Software Foundation, Inc.
    Copyright (C) 1992-1993 Jean-loup Gailly
 
    This program is free software; you can redistribute it and/or modify
@@ -54,9 +54,17 @@ int zip(in, out)
         flags |= ORIG_NAME;
     }
     put_byte(flags);         /* general flags */
-    stamp = (0 <= time_stamp.tv_sec && time_stamp.tv_sec <= 0xffffffff
-             ? (ulg) time_stamp.tv_sec
-             : (ulg) 0);
+    if (time_stamp.tv_nsec < 0)
+      stamp = 0;
+    else if (0 < time_stamp.tv_sec && time_stamp.tv_sec <= 0xffffffff)
+      stamp = time_stamp.tv_sec;
+    else
+      {
+        /* It's intended that timestamp 0 generates this warning,
+           since gzip format reserves 0 for something else.  */
+        warning ("file timestamp out of range for gzip format");
+        stamp = 0;
+      }
     put_long (stamp);
 
     /* Write deflated file to zip file */