Major update to the xzgrep and other scripts based on

the latest versions found from gzip CVS repository.

configure will try to find a POSIX shell to be used by
the scripts. This should ease portability on systems
which have pre-POSIX /bin/sh.

xzgrep and xzdiff support .xz, .lzma, .gz, and .bz2 files.
xzmore and xzless support only .xz and .lzma files.

The name of the xz executable used in these scripts is
now correct even if --program-transform-name has been used.

1 files changed, 37 insertions, 21 deletions

diff --git a/src/scripts/xzdiff.1 b/src/scripts/xzdiff.1
index 7d4f6060..252d1cd3 100644
--- a/src/scripts/xzdiff.1
+++ b/src/scripts/xzdiff.1
@@ -1,7 +1,14 @@
-.\" Original file was take from gzip, thus this man page is under GNU GPLv2+.
-.TH XZDIFF 1 "2009-04-13" "XZ Utils"
+.\"
+.\" Original zdiff.1 for gzip: Jean-loup Gailly
+.\"
+.\" Modifications for XZ Utils: Lasse Collin
+.\"                             Andrew Dudman
+.\"
+.\" License: GNU GPLv2+
+.\"
+.TH XZDIFF 1 "2009-07-05" "Tukaani" "XZ Utils"
 .SH NAME
-xzcmp, xzdiff, lzcmp, lzdiff \- compare .xz and .lzma compressed files
+xzcmp, xzdiff, lzcmp, lzdiff \- compare compressed files
 .SH SYNOPSIS
 .B xzcmp
 .RI [ cmp_options "] " file1 " [" file2 ]
@@ -18,41 +25,50 @@ xzcmp, xzdiff, lzcmp, lzdiff \- compare .xz and .lzma compressed files
 .B  xzcmp
 and
 .B xdiff
-are used to invoke the
+invoke
 .BR cmp (1)
-or the
+or
 .BR diff (1)
-program on compressed files.  All options specified are passed directly to
+on files compressed with
+.BR xz (1),
+.BR lzma (1),
+.BR gzip (1),
+or
+.BR bzip2 (1).
+All options specified are passed directly to
 .B cmp
 or
-.BR diff "."
-If only 1 file is specified, then the files compared are
+.BR diff .
+If only one file is specified, then the files compared are
 .I file1
-(which must have .xz or .lzma suffix) and
+(which must have a suffix of a supported compression format) and
 .I file1
-from which the .xz or .lzma suffix has been stripped.
+from which the compression format suffix has been stripped.
 If two files are specified, then they are uncompressed if necessary and fed to
-.B cmp
+.BR cmp (1)
 or
-.BR diff "."
+.BR diff (1).
 The exit status from
 .B cmp
 or
 .B diff
 is preserved.
-.SH AUTHORS
-This manual page was ripped from
-.BR zdiff (1)
-shipped in gzip package.
+.PP
+The names
+.B lzcmp
+and
+.B lzdiff
+are provided for backward compatibility with LZMA Utils.
 .SH "SEE ALSO"
 .BR cmp (1),
 .BR diff (1),
-.BR xzmore(1),
-.BR xzgrep(1),
-.BR xz (1)
+.BR xz (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR zdiff (1)
 .SH BUGS
 Messages from the
-.B cmp
+.BR cmp (1)
 or
-.B diff
+.BR diff (1)
 programs refer to temporary filenames instead of those specified.