diff -up gzip-1.3.13/gzip.1.noemptysuffix gzip-1.3.13/gzip.1

--- gzip-1.3.13/gzip.1.noemptysuffix	2009-09-26 20:43:28.000000000 +0200

+++ gzip-1.3.13/gzip.1	2010-02-22 14:29:54.828770607 +0100

@@ -291,15 +291,14 @@ will descend into the directory and comp

 ).

 .TP

 .B \-S .suf   --suffix .suf

-Use suffix .suf instead of .gz. Any suffix can be given, but suffixes

+When compressing, use suffix .suf instead of .gz.

+Any non-empty suffix can be given, but suffixes

 other than .z and .gz should be avoided to avoid confusion when files

-are transferred to other systems.  A null suffix forces gunzip to  try

-decompression on all given files regardless of suffix, as in:

+are transferred to other systems.

-    gunzip -S "" *       (*.* for MSDOS)

+When decompressing, add .suf to the beginning of the list of

+suffixes to try, when deriving an output file name from an input file name.

-Previous versions of gzip used

-the .z suffix. This was changed to avoid a conflict with

 .IR pack "(1)".

 .TP

 .B \-t --test

diff -up gzip-1.3.13/gzip.c.noemptysuffix gzip-1.3.13/gzip.c

--- gzip-1.3.13/gzip.c.noemptysuffix	2010-02-22 14:29:54.000000000 +0100

+++ gzip-1.3.13/gzip.c	2010-02-22 14:34:33.480895239 +0100

@@ -547,11 +547,11 @@ int main (argc, argv)

 		program_name);

     }

 #endif

-    if ((z_len == 0 && !decompress) || z_len > MAX_SUFFIX) {

-        fprintf(stderr, "%s: incorrect suffix '%s'\n",

-                program_name, z_suffix);

+    if (z_len == 0 || z_len > MAX_SUFFIX) {

+        fprintf(stderr, "%s: invalid suffix '%s'\n", program_name, z_suffix);

         do_exit(ERROR);

     }

+

     if (do_lzw && !decompress) work = lzw;

     /* Allocate all global buffers (for DYN_ALLOC option) */