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.

3 files changed, 104 insertions, 112 deletions

diff --git a/src/scripts/xzmore b/src/scripts/xzmore
deleted file mode 100755
index 3ff3cbf7..00000000
--- a/src/scripts/xzmore
+++ /dev/null
@@ -1,74 +0,0 @@
-#!/bin/sh
-
-# Copyright (C) 2001 Free Software Foundation
-# Copyright (C) 1992, 1993 Jean-loup Gailly
-# Adapted to XZ Utils from gzip-1.3.3 + Red Hat's security patches
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
-
-case "$0" in
-  *less) PAGER=less ;;
-esac
-
-if test "`echo -n a`" = "-n a"; then
-  # looks like a SysV system:
-  n1=''; n2='\c'
-else
-  n1='-n'; n2=''
-fi
-oldtty=`stty -g 2>/dev/null`
-if stty -cbreak 2>/dev/null; then
-  cb='cbreak'; ncb='-cbreak'
-else
-  # 'stty min 1' resets eof to ^a on both SunOS and SysV!
-  cb='min 1 -icanon'; ncb='icanon eof ^d'
-fi
-if test $? -eq 0 -a -n "$oldtty"; then
-   trap 'stty $oldtty 2>/dev/null; exit' 0 2 3 5 10 13 15
-else
-   trap 'stty $ncb echo 2>/dev/null; exit' 0 2 3 5 10 13 15
-fi
-
-if test $# = 0; then
-    if test -t 0; then
-	echo usage: zmore files...
-    else
-	xz -dc | eval ${PAGER-more}
-    fi
-else
-    FIRST=1
-    for FILE
-    do
-	< "$FILE" || continue
-	if test $FIRST -eq 0; then
-		echo $n1 "--More--(Next file: $FILE)$n2"
-		stty $cb -echo 2>/dev/null
-		ANS=`dd bs=1 count=1 2>/dev/null`
-		stty $ncb echo 2>/dev/null
-		echo " "
-		if test "$ANS" = 'e' -o "$ANS" = 'q'; then
-			exit
-		fi
-	fi
-	if test "$ANS" != 's'; then
-		echo "------> $FILE <------"
-		xz -dc -- "$FILE" | eval ${PAGER-more}
-	fi
-	if test -t; then
-		FIRST=0
-	fi
-    done
-fi
diff --git a/src/scripts/xzmore.1 b/src/scripts/xzmore.1
index dc76ac22..a94e8326 100644
--- a/src/scripts/xzmore.1
+++ b/src/scripts/xzmore.1
@@ -1,66 +1,54 @@
-.\" Original file was take from gzip, thus this man page is under GNU GPLv2+.
-.TH XZMORE 1 "2009-04-13" "XZ Utils"
+.\"
+.\" Original zdiff.1 for gzip: Jean-loup Gailly
+.\" Modifications for XZ Utils: Lasse Collin
+.\"
+.\" License: GNU GPLv2+
+.\"
+.TH XZMORE 1 "2009-07-05" "Tukaani" "XZ Utils"
 .SH NAME
-xzmore, xzless, lzmore, lzless \- view .xz or .lzma compressed (text) files
+xzmore, lzmore \- view xz or lzma compressed (text) files
 .SH SYNOPSIS
 .B xzmore
 .RI [ "filename ..."  ]
 .br
-.B xzless
-.RI [ "filename ..."  ]
-.br
 .B lzmore
 .RI [ "filename ..."  ]
-.br
-.B lzless
-.RI [ "filename ..."  ]
 .SH DESCRIPTION
 .B  xzmore
-is a filter which allows examination of .xz or .lzma compressed text files
-one screenful at a time on a soft-copy terminal.
+is a filter which allows examination of
+.BR xz (1)
+or
+.BR lzma (1)
+compressed text files one screenful at a time on a soft-copy terminal.
 .PP
 To use a pager other than the default
 .B more,
 set environment variable
 .B PAGER
-to the name of the desired program, such as
-.BR less .
-If
-.B xzmore
-is called as
-.B xzless
-then
-.B less
-is used as the
-.BR PAGER .
-The names
+to the name of the desired program.
+The name
 .B lzmore
-and
-.B lzless
-are provided for backward compatibility with LZMA Utils.
+is provided for backward compatibility with LZMA Utils.
 .TP
 .BR e " or " q
 When the prompt --More--(Next file:
 .IR file )
-is printed, this command causes xzmore to exit.
+is printed, this command causes
+.B xzmore
+to exit.
 .TP
 .B s
 When the prompt --More--(Next file:
 .IR file )
-is printed, this command causes zmore to skip the next file and continue.
+is printed, this command causes
+.B xzmore
+to skip the next file and continue.
 .PP
 For list of keyboard commands supported while actually viewing the
 content of a file, refer to manual of the pager you use, usually
-.BR more (1)
-or
-.BR less (1).
-.SH AUTHORS
-This manual page was ripped from
-.BR zmore (1)
-shipped in gzip package.
+.BR more (1).
 .SH "SEE ALSO"
 .BR more (1),
-.BR zmore (1),
-.BR xzdiff (1),
-.BR xzgrep (1),
-.BR xz (1)
+.BR xz (1),
+.BR xzless (1),
+.BR zmore (1)
diff --git a/src/scripts/xzmore.in b/src/scripts/xzmore.in
new file mode 100644
index 00000000..940d6614
--- /dev/null
+++ b/src/scripts/xzmore.in
@@ -0,0 +1,78 @@
+#!@POSIX_SHELL@
+
+# Copyright (C) 2001, 2002, 2007 Free Software Foundation
+# Copyright (C) 1992, 1993 Jean-loup Gailly
+
+# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+#SET_PATH - This line is a placeholder to ease patching this script.
+
+# Instead of unsetting XZ_OPT, just make sure that xz will use file format
+# autodetection. This way memory usage limit and thread limit can be
+# specified via XZ_OPT.
+xz='@xz@ --format=auto'
+
+version='xzmore (@PACKAGE_NAME@) @VERSION@'
+
+usage="Usage: ${0##*/} [OPTION]... [FILE]...
+Like 'more', but operate on the uncompressed contents of xz compressed FILEs.
+
+Report bugs to <@PACKAGE_BUGREPORT@>."
+
+case $1 in
+	--help)    echo "$usage" || exit 2; exit;;
+	--version) echo "$version" || exit 2; exit;;
+esac
+
+oldtty=`stty -g 2>/dev/null`
+if stty -cbreak 2>/dev/null; then
+	cb='cbreak'; ncb='-cbreak'
+else
+	# 'stty min 1' resets eof to ^a on both SunOS and SysV!
+	cb='min 1 -icanon'; ncb='icanon eof ^d'
+fi
+if test $? -eq 0 && test -n "$oldtty"; then
+	trap 'stty $oldtty 2>/dev/null; exit' 0 2 3 5 10 13 15
+else
+	trap 'stty $ncb echo 2>/dev/null; exit' 0 2 3 5 10 13 15
+fi
+
+if test $# = 0; then
+	if test -t 0; then
+		echo "$usage"; exit 1
+	else
+		$xz -cdfq | eval "${PAGER:-more}"
+	fi
+else
+	FIRST=1
+	for FILE; do
+		< "$FILE" || continue
+		if test $FIRST -eq 0; then
+			printf "%s--More--(Next file: %s)" "" "$FILE"
+			stty $cb -echo 2>/dev/null
+			ANS=`dd bs=1 count=1 2>/dev/null`
+			stty $ncb echo 2>/dev/null
+			echo " "
+			case "$ANS" in
+				[eq]) exit;;
+			esac
+		fi
+		if test "$ANS" != 's'; then
+			echo "------> $FILE <------"
+			$xz -cdfq -- "$FILE" | eval "${PAGER:-more}"
+		fi
+		if test -t 1; then
+			FIRST=0
+		fi
+	done
+fi