X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=gzip.1;h=2989842b80f8ac7340a5a648e87a98417edb8d8d;hb=HEAD;hp=06986eb02eb32908daa76462da612532fb3ab8ba;hpb=302189d124ed5849c2589ea92e912eb24fdc4ab3;p=gzip

diff --git a/gzip.1 b/gzip.1
index 06986eb..2989842 100644
--- a/gzip.1
+++ b/gzip.1
@@ -121,7 +121,13 @@ Files created by
 .I zip
 can be uncompressed by gzip only if they have a single member compressed
 with the 'deflation' method. This feature is only intended to help
-conversion of tar.zip files to the tar.gz format. To extract zip files
+conversion of tar.zip files to the tar.gz format.  To extract a
+.I zip
+file with a single member, use a command like
+.I "gunzip <foo.zip"
+or
+.IR "gunzip -S .zip foo.zip" .
+To extract zip files
 with several members, use
 .I unzip
 instead of
@@ -170,6 +176,16 @@ number of used disk blocks almost never increases.
 .I gzip
 preserves the mode, ownership and timestamps of files when compressing
 or decompressing.
+.PP
+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>,
+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).
 
 .SH OPTIONS
 .TP
@@ -194,7 +210,7 @@ is read from or written to a terminal. If the input data is not in
 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.
@@ -274,6 +290,15 @@ will descend into the directory and compress all the files it finds there
 .I gunzip
 ).
 .TP
+.B --rsyncable
+While compressing, synchronize the output occasionally based on the input.
+This increases size by less than 1 percent most cases, but means that the
+.BR rsync (1)
+program can much more efficiently synchronize files compressed with this flag.
+.I gunzip
+cannot tell the difference between a compressed file created with this option,
+and one created without it.
+.TP
 .B \-S .suf   --suffix .suf
 Use suffix .suf instead of .gz. Any suffix can be given, but suffixes
 other than .z and .gz should be avoided to avoid confusion when files
@@ -457,7 +482,7 @@ GNU tar. Make sure that the same block size (-b option of tar) is used
 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
@@ -474,7 +499,7 @@ the default compression level (-6). On some highly redundant files,
 compresses better than
 .I gzip.
 .SH "COPYRIGHT NOTICE"
-Copyright \(co 1998, 1999, 2001 Free Software Foundation, Inc.
+Copyright \(co 1998, 1999, 2001, 2002 Free Software Foundation, Inc.
 .br
 Copyright \(co 1992, 1993 Jean-loup Gailly
 .PP