1 files changed, 51 insertions, 34 deletions
diff --git a/src/scripts/xzgrep.1 b/src/scripts/xzgrep.1
index d8647f2a..996d64ae 100644
--- a/src/scripts/xzgrep.1
+++ b/src/scripts/xzgrep.1
@@ -1,13 +1,20 @@
-.\" Original file was take from gzip, thus this man page is under GNU GPLv2+.
-.TH XZGREP 1 "2009-04-13" "XZ Utils"
+.\"
+.\" Original zgrep.1 for gzip: Jean-loup Gailly
+.\"                            Charles Levert <charles@comm.polymtl.ca>
+.\"
+.\" Modifications for XZ Utils: Lasse Collin
+.\"
+.\" License: GNU GPLv2+
+.\"
+.TH XZGREP 1 "2009-07-05" "Tukaani" "XZ Utils"
 .SH NAME
-xzgrep \- search .xz and .lzma compressed files for a regular expression
+xzgrep \- search compressed files for a regular expression
 .SH SYNOPSIS
 .B xzgrep
 .RI [ grep_options ]
 .RB  [ \-e ]
 .I pattern
-.IR filename ".\|.\|."
+.IR file ".\|.\|."
 .br
 .B xzegrep
 .RB ...
@@ -25,14 +32,28 @@ xzgrep \- search .xz and .lzma compressed files for a regular expression
 .RB ...
 .SH DESCRIPTION
 .B  xzgrep
-is used to invoke the
+invokes
 .BR grep (1)
-on .xz or .lzma compressed files. All options specified are passed directly to
-.BR grep .
-If no file is specified, then the standard input is decompressed
-if necessary and fed to grep.
-Otherwise the given files are uncompressed if necessary and fed to
-.BR grep .
+on
+.I files
+which may be either uncompressed or compressed with
+.BR xz (1),
+.BR lzma (1),
+.BR gzip (1),
+or
+.BR bzip2 (1).
+All options specified are passed directly to
+.BR grep (1).
+.PP
+If no
+.I file
+is specified, then the standard input is decompressed if necessary and fed to
+.BR grep (1).
+When reading from standard input,
+.BR gzip (1)
+and
+.BR bzip2 (1)
+compressed files are not supported.
 .PP
 If
 .B xzgrep
@@ -41,37 +62,33 @@ is invoked as
 or
 .B xzfgrep
 then
-.B egrep
+.BR egrep (1)
 or
-.B fgrep
+.BR fgrep (1)
 is used instead of
-.B grep.
+.BR grep (1).
 The same applies to names
 .BR lzgrep ,
 .BR lzegrep ,
 and
 .BR lzfgrep ,
 which are provided for backward compatibility with LZMA Utils.
-
-If the GREP environment variable is set,
-.B xzgrep
-uses it as the
-.B grep
-program to be invoked. For example:
-
-    for sh:  GREP=fgrep  xzgrep string files
-    for csh: (setenv GREP fgrep; xzgrep string files)
-.SH AUTHORS
-Original
-.BR zgrep (1)
-manual page by Charles Levert <charles@comm.polymtl.ca>.
 .PP
-Minor modifications for XZ Utils by Lasse Collin
-<lasse.collin@tukaani.org>.
-.SH "SEE ALSO"
+.SH ENVIRONMENT
+.TP
+.B GREP
+If the
+.B GREP
+environment variable is set,
+.B xzgrep
+uses it instead of
 .BR grep (1),
 .BR egrep (1),
-.BR fgrep (1),
-.BR xzdiff (1),
-.BR xzmore (1),
-.BR xz (1)
+or
+.BR fgrep (1).
+.SH "SEE ALSO"
+.BR grep (1),
+.BR xz (1),
+.BR gzip (1),
+.BR bzip2 (1),
+.BR zgrep (1)