.PP
.I gunzip
takes a list of files on its command line and replaces each
-file whose name ends with .gz, -gz, .z, -z, _z or .Z
+file whose name ends with .gz, -gz, .z, -z, or _z (ignoring case)
and which begins with the correct magic number with an uncompressed
file without the original extension.
.I gunzip
The
.I gzip
file format is specified in P. Deutsch, \s-1GZIP\s0 file format
-specification version 4.3, <ftp://ftp.isi.edu/in-notes/rfc1952.txt>,
+specification version 4.3, <http://www.ietf.org/rfc/rfc1952.txt>,
Internet RFC 1952 (May 1996). The
.I zip
deflation format is specified in P. Deutsch, \s-1DEFLATE\s0 Compressed
Data Format Specification version 1.3,
-<ftp://ftp.isi.edu/in-notes/rfc1951.txt>, Internet RFC 1951 (May 1996).
+<http://www.ietf.org/rfc/rfc1951.txt>, Internet RFC 1951 (May 1996).
.SH OPTIONS
.TP
a format recognized by
.I gzip,
and if the option --stdout is also given, copy the input data without change
-to the standard ouput: let
+to the standard output: let
.I zcat
behave as
.I cat.
).
.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
On Vax/VMS, the name of the environment variable is GZIP_OPT, to
avoid a conflict with the symbol set for invocation of the program.
.SH "SEE ALSO"
-znew(1), zcmp(1), zmore(1), zforce(1), gzexe(1), zip(1), unzip(1), compress(1),
-pack(1), compact(1)
+znew(1), zcmp(1), zmore(1), zforce(1), gzexe(1), zip(1), unzip(1), compress(1)
.PP
The
.I gzip
file format is specified in P. Deutsch, \s-1GZIP\s0 file format
specification version 4.3,
-.BR <ftp://ftp.isi.edu/in-notes/rfc1952.txt> ,
+.BR <http://www.ietf.org/rfc/rfc1952.txt> ,
Internet RFC 1952 (May 1996).
The
.I zip
deflation format is specified in P. Deutsch, \s-1DEFLATE\s0 Compressed
Data Format Specification version 1.3,
-.BR <ftp://ftp.isi.edu/in-notes/rfc1951.txt> ,
+.BR <http://www.ietf.org/rfc/rfc1951.txt> ,
Internet RFC 1951 (May 1996).
.SH "DIAGNOSTICS"
Exit status is normally 0;
for reading and writing compressed data on tapes. (This example
assumes you are using the GNU version of tar.)
.SH BUGS
-The gzip format represents the the input size modulo 2^32, so the
+The gzip format represents the input size modulo 2^32, so the
--list option reports incorrect uncompressed sizes and compression
ratios for uncompressed files 4 GB and larger. To work around this
problem, you can use the following command to discover a large