Merging upstream version 0.7.

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

17 files changed, 318 insertions, 96 deletions

diff --git a/ChangeLog b/ChangeLog
index 4a0b508..9b76424 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-10-21  Antonio Diaz Diaz  <ant_diaz@teleline.es>
+
+	* Version 0.7 released.
+	* Added new utility; ztest.
+	* zcat.in: Added new option "--recursive".
+
 2009-10-05  Antonio Diaz Diaz  <ant_diaz@teleline.es>
 
 	* Version 0.6 released.
diff --git a/Makefile.in b/Makefile.in
index a3c14ba..edaf42f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -8,7 +8,7 @@ INSTALL_DIR = $(INSTALL) -d -m 755
 SHELL = /bin/sh
 
 objs = arg_parser.o main.o
-scripts = zcat zcmp zdiff zegrep zfgrep zgrep
+scripts = zcat zcmp zdiff zegrep zfgrep zgrep ztest
 
 
 .PHONY : all install install-info install-man install-strip \
@@ -47,6 +47,10 @@ zgrep : zgrep.in
 	sed -e 's,VERSION,$(progversion),g' $(VPATH)/zgrep.in > zgrep
 	chmod a+x zgrep
 
+ztest : ztest.in
+	sed -e 's,VERSION,$(progversion),g' $(VPATH)/ztest.in > ztest
+	chmod a+x ztest
+
 main.o : main.cc
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -DPROGVERSION=\"$(progversion)\" -c -o $@ $<
 
@@ -65,7 +69,8 @@ info : $(VPATH)/doc/$(progname).info
 $(VPATH)/doc/$(progname).info : $(VPATH)/doc/$(progname).texinfo
 	cd $(VPATH)/doc && makeinfo $(progname).texinfo
 
-man : $(VPATH)/doc/zcat.1 $(VPATH)/doc/zdiff.1 $(VPATH)/doc/zgrep.1
+man : $(VPATH)/doc/zcat.1 $(VPATH)/doc/zdiff.1 \
+      $(VPATH)/doc/zgrep.1 $(VPATH)/doc/ztest.1
 
 $(VPATH)/doc/zcat.1 : zcat
 	help2man -n 'concatenate compressed files to stdout' \
@@ -79,6 +84,10 @@ $(VPATH)/doc/zgrep.1 : zgrep
 	help2man -n 'search compressed files for a regular expression' \
 	  -o $(VPATH)/doc/zgrep.1 --no-info ./zgrep
 
+$(VPATH)/doc/ztest.1 : ztest
+	help2man -n 'verify integrity of compressed files' \
+	  -o $(VPATH)/doc/ztest.1 --no-info ./ztest
+
 Makefile : $(VPATH)/configure $(VPATH)/Makefile.in
 	./config.status
 
@@ -86,7 +95,7 @@ check : all $(VPATH)/testsuite/check.sh
 	@$(VPATH)/testsuite/check.sh $(VPATH)/testsuite
 
 install : all install-info install-man
-	if test ! -d $(DESTDIR)$(bindir) ; then $(INSTALL_DIR) $(DESTDIR)$(bindir) ; fi
+	if [ ! -d $(DESTDIR)$(bindir) ] ; then $(INSTALL_DIR) $(DESTDIR)$(bindir) ; fi
 	$(INSTALL_PROGRAM) ./$(progname) $(DESTDIR)$(bindir)/$(progname)
 	$(INSTALL_SCRIPT) zcat $(DESTDIR)$(bindir)/zcat
 	$(INSTALL_SCRIPT) zcmp $(DESTDIR)$(bindir)/zcmp
@@ -94,14 +103,15 @@ install : all install-info install-man
 	$(INSTALL_SCRIPT) zegrep $(DESTDIR)$(bindir)/zegrep
 	$(INSTALL_SCRIPT) zfgrep $(DESTDIR)$(bindir)/zfgrep
 	$(INSTALL_SCRIPT) zgrep $(DESTDIR)$(bindir)/zgrep
+	$(INSTALL_SCRIPT) ztest $(DESTDIR)$(bindir)/ztest
 
 install-info :
-	if test ! -d $(DESTDIR)$(infodir) ; then $(INSTALL_DIR) $(DESTDIR)$(infodir) ; fi
+	if [ ! -d $(DESTDIR)$(infodir) ] ; then $(INSTALL_DIR) $(DESTDIR)$(infodir) ; fi
 	$(INSTALL_DATA) $(VPATH)/doc/$(progname).info $(DESTDIR)$(infodir)/$(progname).info
 	-install-info --info-dir=$(DESTDIR)$(infodir) $(DESTDIR)$(infodir)/$(progname).info
 
 install-man :
-	if test ! -d $(DESTDIR)$(mandir)/man1 ; then $(INSTALL_DIR) $(DESTDIR)$(mandir)/man1 ; fi
+	if [ ! -d $(DESTDIR)$(mandir)/man1 ] ; then $(INSTALL_DIR) $(DESTDIR)$(mandir)/man1 ; fi
 	$(INSTALL_DATA) $(VPATH)/doc/zcat.1 $(DESTDIR)$(mandir)/man1/zcat.1
 	-rm -f $(DESTDIR)$(mandir)/man1/zcmp.1
 	cd $(DESTDIR)$(mandir)/man1 && ln -s zdiff.1 zcmp.1
@@ -111,6 +121,7 @@ install-man :
 	-rm -f $(DESTDIR)$(mandir)/man1/zfgrep.1
 	cd $(DESTDIR)$(mandir)/man1 && ln -s zgrep.1 zegrep.1
 	cd $(DESTDIR)$(mandir)/man1 && ln -s zgrep.1 zfgrep.1
+	$(INSTALL_DATA) $(VPATH)/doc/ztest.1 $(DESTDIR)$(mandir)/man1/ztest.1
 
 install-strip : all
 	$(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' install
@@ -123,6 +134,7 @@ uninstall : uninstall-info uninstall-man
 	-rm -f $(DESTDIR)$(bindir)/zegrep
 	-rm -f $(DESTDIR)$(bindir)/zfgrep
 	-rm -f $(DESTDIR)$(bindir)/zgrep
+	-rm -f $(DESTDIR)$(bindir)/ztest
 
 uninstall-info :
 	-install-info --info-dir=$(DESTDIR)$(infodir) --remove $(DESTDIR)$(infodir)/$(progname).info
@@ -135,6 +147,7 @@ uninstall-man :
 	-rm -f $(DESTDIR)$(mandir)/man1/zegrep.1
 	-rm -f $(DESTDIR)$(mandir)/man1/zfgrep.1
 	-rm -f $(DESTDIR)$(mandir)/man1/zgrep.1
+	-rm -f $(DESTDIR)$(mandir)/man1/ztest.1
 
 dist :
 	ln -sf $(VPATH) $(DISTNAME)
diff --git a/NEWS b/NEWS
index 4cd06b6..f089972 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
-Changes in version 0.6:
+Changes in version 0.7:
 
-Format of data read from stdin is now automatically detected.
+The new utility ztest, able to recursively test all the compressed files
+in a directory tree, has been added.
+
+The option "--recursive" has been added to zcat.
diff --git a/README b/README
index c1454bc..2550b69 100644
--- a/README
+++ b/README
@@ -2,10 +2,10 @@ Description
 
 Zutils is a collection of utilities for dealing with any combination of
 compressed and non-compressed files transparently. The supported
-compressors are gzip, bzip2, lzip and xz.
+compressors are bzip2, gzip, lzip and xz.
 
-The currently provided utilities are zcat, zcmp, zdiff, zegrep, zfgrep
-and zgrep.
+The currently provided utilities are zcat, zcmp, zdiff, zegrep, zfgrep,
+zgrep and ztest.
 
 
 Copyright (C) 2009 Antonio Diaz Diaz.
diff --git a/configure b/configure
index 100a1e2..c8eda48 100755
--- a/configure
+++ b/configure
@@ -5,12 +5,12 @@
 # This configure script is free software: you have unlimited permission
 # to copy, distribute and modify it.
 #
-# Date of this version: 2009-10-05
+# Date of this version: 2009-10-21
 
 args=
 no_create=
 progname=zutils
-progversion=0.6
+progversion=0.7
 srctrigger=zdiff.in
 
 # clear some things potentially inherited from environment.
diff --git a/doc/zcat.1 b/doc/zcat.1
index 6789957..5187b27 100644
--- a/doc/zcat.1
+++ b/doc/zcat.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.36.
-.TH ZCAT "1" "October 2009" "Zcat 0.6" "User Commands"
+.TH ZCAT "1" "October 2009" "Zcat 0.7" "User Commands"
 .SH NAME
 Zcat \- concatenate compressed files to stdout
 .SH SYNOPSIS
@@ -16,7 +16,7 @@ corresponding to the supported compressors. If no files are specified,
 data is read from standard input, decompressed if needed, and sent to
 stdout. Data read from standard input must be of the same type; all
 uncompressed or all compressed with the same compressor.
-The supported compressors are gzip, bzip2, lzip and xz.
+The supported compressors are bzip2, gzip, lzip and xz.
 .PP
 CAT_OPTIONS are passed directly to cat.
 The exit status from cat is preserved.
@@ -27,6 +27,9 @@ display this help and exit
 .TP
 \fB\-V\fR, \fB\-\-version\fR
 output version information and exit
+.TP
+\fB\-r\fR, \fB\-\-recursive\fR
+operate recursively on directories
 .SH "REPORTING BUGS"
 Report bugs to zutils\-bug@nongnu.org
 Zutils home page: http://www.nongnu.org/zutils/zutils.html
diff --git a/doc/zdiff.1 b/doc/zdiff.1
index cf19d27..896d735 100644
--- a/doc/zdiff.1
+++ b/doc/zdiff.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.36.
-.TH ZDIFF "1" "October 2009" "Zdiff 0.6" "User Commands"
+.TH ZDIFF "1" "October 2009" "Zdiff 0.7" "User Commands"
 .SH NAME
 Zdiff \- compare compressed files
 .SH SYNOPSIS
@@ -11,7 +11,7 @@ Zdiff \- Diff/cmp wrapper for compressed files.
 Zdiff is a wrapper script around the diff and cmp commands that allows
 transparent comparison of any combination of compressed and
 non\-compressed files. If any given file is compressed, its uncompressed
-content is used. The supported compressors are gzip, bzip2, lzip and xz.
+content is used. The supported compressors are bzip2, gzip, lzip and xz.
 .PP
 Zcmp is a shortcut for "zdiff \fB\-\-cmp\fR"
 .PP
@@ -19,7 +19,7 @@ Compares FILE1 to FILE2. If FILE2 is omitted and FILE1 is compressed,
 compares FILE1 to the file with the corresponding decompressed file
 name (removes the extension from FILE1). If FILE2 is omitted and FILE1
 is not compressed, compares FILE1 to the uncompressed contents of
-FILE1.[gz|bz2|lz|xz] (the first one that is found).
+FILE1.[bz2|gz|lz|xz] (the first one that is found).
 DIFF_OPTIONS are passed directly to diff or cmp.
 The exit status from diff or cmp is preserved.
 .SH OPTIONS
diff --git a/doc/zgrep.1 b/doc/zgrep.1
index fc22717..92c4010 100644
--- a/doc/zgrep.1
+++ b/doc/zgrep.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.36.
-.TH ZGREP "1" "October 2009" "Zgrep 0.6" "User Commands"
+.TH ZGREP "1" "October 2009" "Zgrep 0.7" "User Commands"
 .SH NAME
 Zgrep \- search compressed files for a regular expression
 .SH SYNOPSIS
@@ -16,7 +16,7 @@ names corresponding to the supported compressors. If no files are
 specified, data is read from standard input, decompressed if needed, and
 fed to grep. Data read from standard input must be of the same type; all
 uncompressed or all compressed with the same compressor.
-The supported compressors are gzip, bzip2, lzip and xz.
+The supported compressors are bzip2, gzip, lzip and xz.
 .PP
 Zegrep is a shortcut for "zgrep \fB\-E\fR"
 Zfgrep is a shortcut for "zgrep \fB\-F\fR"
diff --git a/doc/ztest.1 b/doc/ztest.1
new file mode 100644
index 0000000..f32c7d7
--- /dev/null
+++ b/doc/ztest.1
@@ -0,0 +1,40 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.36.
+.TH ZTEST "1" "October 2009" "Ztest 0.7" "User Commands"
+.SH NAME
+Ztest \- verify integrity of compressed files
+.SH SYNOPSIS
+.B ztest
+[\fIOPTIONS\fR] [\fIFILES\fR]
+.SH DESCRIPTION
+Ztest \- Test integrity of compressed files.
+.PP
+Ztest verifies the integrity of the specified compressed files.
+Non\-compressed files are ignored. If no files are specified, the
+integrity of compressed data read from standard input is verified. Data
+read from standard input must be all compressed with the same compressor.
+The supported compressors are bzip2, gzip, lzip and xz.
+.PP
+The exit status is 1 if any compressed file is corrupt, 0 otherwise.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+output version information and exit
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+suppress all messages
+.TP
+\fB\-r\fR, \fB\-\-recursive\fR
+operate recursively on directories
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+be verbose (a 2nd \fB\-v\fR gives more)
+.SH "REPORTING BUGS"
+Report bugs to zutils\-bug@nongnu.org
+Zutils home page: http://www.nongnu.org/zutils/zutils.html
+.SH COPYRIGHT
+Copyright \(co 2009 Antonio Diaz Diaz.
+This script is free software: you have unlimited permission
+to copy, distribute and modify it.
diff --git a/doc/zutils.info b/doc/zutils.info
index 34f390b..ba5ff0a 100644
--- a/doc/zutils.info
+++ b/doc/zutils.info
diff --git a/doc/zutils.texinfo b/doc/zutils.texinfo
index 3902270..d6f724d 100644
--- a/doc/zutils.texinfo
+++ b/doc/zutils.texinfo
@@ -1,12 +1,12 @@
 \input texinfo @c -*-texinfo-*-
 @c %**start of header
 @setfilename zutils.info
-@settitle Zutils
+@settitle Zutils Manual
 @finalout
 @c %**end of header
 
-@set UPDATED 5 October 2009
-@set VERSION 0.6
+@set UPDATED 21 October 2009
+@set VERSION 0.7
 
 @dircategory Data Compression
 @direntry
@@ -36,6 +36,7 @@ This manual is for Zutils (version @value{VERSION}, @value{UPDATED}).
 * Zcat::		Concatenating compressed files
 * Zcmp/Zdiff::		Comparing compressed files
 * Zgrep::		Searching inside compressed files
+* Ztest::		Testing integrity of compressed files
 * Problems::		Reporting bugs
 * Concept Index::	Index of concepts
 @end menu
@@ -53,10 +54,10 @@ to copy, distribute and modify it.
 
 Zutils is a collection of utilities for dealing with any combination of
 compressed and non-compressed files transparently. The supported
-compressors are gzip, bzip2, lzip and xz.
+compressors are bzip2, gzip, lzip and xz.
 
-The currently provided utilities are zcat, zcmp, zdiff, zegrep, zfgrep
-and zgrep.
+The currently provided utilities are zcat, zcmp, zdiff, zegrep, zfgrep,
+zgrep and ztest.
 
 
 @node Zcat
@@ -93,6 +94,10 @@ Print an informative help message describing the options and exit.
 @itemx -V
 Print the version number of zcat on the standard output and exit.
 
+@item --recursive
+@itemx -r
+Operate recursively on directories.
+
 @end table
 
 
@@ -121,7 +126,7 @@ Compares @var{file1} to @var{file2}. If @var{file2} is omitted and
 corresponding decompressed file name (removes the extension from
 @var{file1}). If @var{file2} is omitted and @var{file1} is not
 compressed, compares @var{file1} to the uncompressed contents of
-@var{file1}.[gz|bz2|lz|xz] (the first one that is found).
+@var{file1}.[bz2|gz|lz|xz] (the first one that is found).
 @var{diff_options} are passed directly to diff or cmp. The exit status
 from diff or cmp is preserved.
 
@@ -192,6 +197,51 @@ Print the version number of zgrep on the standard output and exit.
 @end table
 
 
+@node Ztest
+@chapter Ztest
+@cindex ztest
+
+Ztest verifies the integrity of the specified compressed files.
+Non-compressed files are ignored. If no files are specified, the
+integrity of compressed data read from standard input is verified. Data
+read from standard input must be all compressed with the same compressor.
+
+The format for running ztest is:
+
+@example
+ztest [@var{options}] [@var{files}]
+@end example
+
+@noindent
+The exit status is 0 if all files verify OK, 1 otherwise.
+
+Ztest supports the following options:
+
+@table @samp
+@item --help
+@itemx -h
+Print an informative help message describing the options and exit.
+
+@item --version
+@itemx -V
+Print the version number of ztest on the standard output and exit.
+
+@item --quiet
+@itemx -q
+Quiet operation. Suppress all messages.
+
+@item --recursive
+@itemx -r
+Operate recursively on directories.
+
+@item --verbose
+@itemx -v
+Verbose mode. Show the verify status for each file processed.
+Further -v's increase the verbosity level.
+
+@end table
+
+
 @node Problems
 @chapter Reporting Bugs
 @cindex bugs
diff --git a/main.cc b/main.cc
index 828ac06..eba364b 100644
--- a/main.cc
+++ b/main.cc
@@ -551,8 +551,8 @@ int print_magic_type( const std::string & magic_type )
   {
   std::string data;
 
-  if( magic_type == "gzip" ) std::printf( "\x1F\x8B" );
-  else if( magic_type == "bzip2" ) std::printf( "BZh" );
+  if( magic_type == "bzip2" ) std::printf( "BZh" );
+  else if( magic_type == "gzip" ) std::printf( "\x1F\x8B" );
   else if( magic_type == "lzip" ) std::printf( "LZIP" );
   else if( magic_type == "xz" ) std::printf( "%c7zXZ", '\xFD' );
   else if( hex_to_data( magic_type, data ) ) std::printf( data.c_str() );
diff --git a/testsuite/check.sh b/testsuite/check.sh
index 41e44b7..1c8b249 100755
--- a/testsuite/check.sh
+++ b/testsuite/check.sh
@@ -15,10 +15,12 @@ ZDIFF="${objdir}"/zdiff
 ZGREP="${objdir}"/zgrep
 ZEGREP="${objdir}"/zegrep
 ZFGREP="${objdir}"/zfgrep
+ZTEST="${objdir}"/ztest
 ZUTILS="${objdir}"/zutils
-compressors="gzip bzip2 lzip"
+compressors="bzip2 gzip lzip"
 extensions="gz bz2 lz"
 framework_failure() { echo 'failure in testing framework'; exit 1; }
+compressor_needed() { echo "${compressors} are needed to run tests"; exit 1; }
 
 if [ ! -x "${ZCAT}" ] ; then
 	echo "${ZCAT}: cannot execute"
@@ -27,15 +29,14 @@ fi
 
 if [ -d tmp ] ; then rm -rf tmp ; fi
 mkdir tmp
-echo -n "testing zutils..."
 cd "${objdir}"/tmp
 
 for i in ${compressors}; do
 	cat "${testdir}"/../COPYING > in || framework_failure
-	$i in || framework_failure
-	echo -n .
+	$i in || compressor_needed
 done
 
+echo -n "testing zutils..."
 cat "${testdir}"/../COPYING > in || framework_failure
 cat in > -in- || framework_failure
 cat in.lz > -in-.lz || framework_failure
@@ -136,16 +137,21 @@ echo -n .
 "${ZFGREP}" License in 2>&1 > /dev/null || fail=1
 echo -n .
 
-if [ "gzip" != `"${ZUTILS}" -t in.gz` ]; then fail=1 ; fi
+"${ZTEST}" in in.gz in.bz2 in.lz -- -in- || fail=1
+echo -n .
+"${ZTEST}" -r . || fail=1
+echo -n .
+
+if [ "bzip2" != `"${ZUTILS}" -t in.bz2` ] ; then fail=1 ; fi
 echo -n .
-if [ "bzip2" != `"${ZUTILS}" -t in.bz2` ]; then fail=1 ; fi
+if [ "gzip" != `"${ZUTILS}" -t in.gz` ] ; then fail=1 ; fi
 echo -n .
-if [ "lzip" != `"${ZUTILS}" -t in.lz` ]; then fail=1 ; fi
+if [ "lzip" != `"${ZUTILS}" -t in.lz` ] ; then fail=1 ; fi
 echo -n .
 
 
 echo
-if [ ${fail} = 0 ]; then
+if [ ${fail} = 0 ] ; then
 	echo "tests completed successfully."
 	cd "${objdir}" && rm -r tmp
 else
diff --git a/zcat.in b/zcat.in
index fb7ab73..010b7bb 100644
--- a/zcat.in
+++ b/zcat.in
@@ -8,6 +8,9 @@
 LC_ALL=C
 export LC_ALL
 args=
+gz_args=
+xz_args=
+recursive=0
 two_hyphens=0
 
 # Loop over args until a filename is found
@@ -25,7 +28,7 @@ while [ x"$1" != x ] ; do
 		echo "data is read from standard input, decompressed if needed, and sent to"
 		echo "stdout. Data read from standard input must be of the same type; all"
 		echo "uncompressed or all compressed with the same compressor."
-		echo "The supported compressors are gzip, bzip2, lzip and xz."
+		echo "The supported compressors are bzip2, gzip, lzip and xz."
 		echo
 		echo "Usage: $0 [OPTIONS] [CAT_OPTIONS] [FILES]"
 		echo
@@ -35,6 +38,7 @@ while [ x"$1" != x ] ; do
 		echo "Options:"
 		echo "  -h, --help          display this help and exit"
 		echo "  -V, --version       output version information and exit"
+		echo "  -r, --recursive     operate recursively on directories"
 		echo
 		echo "Report bugs to zutils-bug@nongnu.org"
 		echo "Zutils home page: http://www.nongnu.org/zutils/zutils.html"
@@ -45,8 +49,12 @@ while [ x"$1" != x ] ; do
 		echo "This script is free software: you have unlimited permission"
 		echo "to copy, distribute and modify it."
 		exit 0 ;;
-	- | -f)
+	- | -c | --st* | -d | --de* | -f | --fo* | -q | --qu* | -L | --lic* )
 		;;
+	-l | --lis*)
+		gz_args="${gz_args} $1"; xz_args="${xz_args} $1" ;;
+	-r | --re*)
+		recursive=1 ;;
 	--)
 		shift ; two_hyphens=1 ; break ;;
 	-?*)
@@ -57,14 +65,14 @@ while [ x"$1" != x ] ; do
 	shift
 done
 
-if [ $# = 0 ]; then
+if [ $# = 0 ] ; then
 	bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
 	prog_name=`"${bindir}"zutils -t`
 	case "${prog_name}" in
-	gzip)	prog="gzip -cdfq" ;;
 	bzip2)	prog="bzip2 -cdfq" ;;
+	gzip)	prog="gzip -cdfq ${gz_args}" ;;
 	lzip)	prog="lzip -cdfq" ;;
-	xz)	prog="xz -cdfq" ;;
+	xz)	prog="xz -cdfq ${xz_args}" ;;
 	*)	prog=cat ;;
 	esac
 	{ "${bindir}"zutils -m ${prog_name} ; cat ; } | ${prog} | cat ${args}
@@ -75,29 +83,32 @@ retval=0
 for i in "$@" ; do
 	if [ "$i" = "--" ] && [ ${two_hyphens} = 0 ] ; then two_hyphens=1
 	else
-		if [ ! -f "$i" ]; then
-			if [ -f "$i.gz" ];    then i="$i.gz"
-			elif [ -f "$i.bz2" ]; then i="$i.bz2"
-			elif [ -f "$i.lz" ];  then i="$i.lz"
-			elif [ -f "$i.xz" ];  then i="$i.xz"
+		if [ ! -f "$i" ] ; then
+			if [ -f "$i.gz" ] ;    then i="$i.gz"
+			elif [ -f "$i.bz2" ] ; then i="$i.bz2"
+			elif [ -f "$i.lz" ] ;  then i="$i.lz"
+			elif [ -f "$i.xz" ] ;  then i="$i.xz"
+			elif [ ${recursive} = 1 ] && [ -d "$i" ] ; then
+				find "$i" -type f -exec "$0" '{}' ';'
+				continue
 			else
 				echo "$0: File \"$i\" not found or not a regular file" 1>&2
-				if [ ${retval} = 0 ]; then retval=1 ; fi
+				if [ ${retval} = 0 ] ; then retval=1 ; fi
 				continue
 			fi
 		fi
 		bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
 		prog_name=`"${bindir}"zutils -t -- "$i"`
 		case "${prog_name}" in
-		gzip)	prog="gzip -cdfq" ;;
 		bzip2)	prog="bzip2 -cdfq" ;;
+		gzip)	prog="gzip -cdfq ${gz_args}" ;;
 		lzip)	prog="lzip -cdfq" ;;
-		xz)	prog="xz -cdfq" ;;
+		xz)	prog="xz -cdfq ${xz_args}" ;;
 		*)	prog=cat ;;
 		esac
 		${prog} -- "$i" | cat ${args}
 		r=$?
-		if [ $r != 0 ]; then retval=$r ; fi
+		if [ $r != 0 ] ; then retval=$r ; fi
 	fi
 done
 
diff --git a/zdiff.in b/zdiff.in
index 9ac0a58..0ece51f 100644
--- a/zdiff.in
+++ b/zdiff.in
@@ -23,7 +23,7 @@ while [ x"$1" != x ] ; do
 		echo "Zdiff is a wrapper script around the diff and cmp commands that allows"
 		echo "transparent comparison of any combination of compressed and"
 		echo "non-compressed files. If any given file is compressed, its uncompressed"
-		echo "content is used. The supported compressors are gzip, bzip2, lzip and xz."
+		echo "content is used. The supported compressors are bzip2, gzip, lzip and xz."
 		echo
 		echo "Zcmp is a shortcut for \"zdiff --cmp\""
 		echo
@@ -33,7 +33,7 @@ while [ x"$1" != x ] ; do
 		echo "compares FILE1 to the file with the corresponding decompressed file"
 		echo "name (removes the extension from FILE1). If FILE2 is omitted and FILE1"
 		echo "is not compressed, compares FILE1 to the uncompressed contents of"
-		echo "FILE1.[gz|bz2|lz|xz] (the first one that is found)."
+		echo "FILE1.[bz2|gz|lz|xz] (the first one that is found)."
 		echo "DIFF_OPTIONS are passed directly to diff or cmp."
 		echo "The exit status from diff or cmp is preserved."
 		echo
@@ -73,10 +73,10 @@ done
 for i in "$@" ; do
 	if [ "$i" = "--" ] && [ ${two_hyphens} = 0 ] ; then two_hyphens=1
 	else
-		if [ -f "$i" ]; then
-			if [ -z "${file1}" ]; then file1="$i"
+		if [ -f "$i" ] ; then
+			if [ -z "${file1}" ] ; then file1="$i"
 			else
-				if [ -z "${file2}" ]; then file2="$i"
+				if [ -z "${file2}" ] ; then file2="$i"
 				else
 					echo "$0: Too many files; use --help for usage." 1>&2
 				fi
@@ -88,27 +88,27 @@ for i in "$@" ; do
 	fi
 done
 
-if [ -z "${file1}" ]; then
+if [ -z "${file1}" ] ; then
 	echo "$0: No files given; use --help for usage." 1>&2
 	exit 1
 fi
 
-if [ -z "${file2}" ]; then
+if [ -z "${file2}" ] ; then
 	case "${file1}" in
-	*.gz)	file2=`printf "%s" "${file1}" | sed -e 's,.gz$,,'` ;;
-	*.tgz)	file2=`printf "%s" "${file1}" | sed -e 's,tgz$,tar,'` ;;
 	*.bz2)	file2=`printf "%s" "${file1}" | sed -e 's,.bz2$,,'` ;;
 	*.tbz)	file2=`printf "%s" "${file1}" | sed -e 's,tbz$,tar,'` ;;
 	*.tbz2)	file2=`printf "%s" "${file1}" | sed -e 's,tbz2$,tar,'` ;;
+	*.gz)	file2=`printf "%s" "${file1}" | sed -e 's,.gz$,,'` ;;
+	*.tgz)	file2=`printf "%s" "${file1}" | sed -e 's,tgz$,tar,'` ;;
 	*.lz)	file2=`printf "%s" "${file1}" | sed -e 's,.lz$,,'` ;;
 	*.tlz)	file2=`printf "%s" "${file1}" | sed -e 's,tlz$,tar,'` ;;
 	*.xz)	file2=`printf "%s" "${file1}" | sed -e 's,.xz$,,'` ;;
 	*.txz)	file2=`printf "%s" "${file1}" | sed -e 's,txz$,tar,'` ;;
 	*)
-		if [ -f "${file1}.gz" ];  then file2="${file1}.gz"
-		elif [ -f "${file1}.bz2" ]; then file2="${file1}.bz2"
-		elif [ -f "${file1}.lz" ];  then file2="${file1}.lz"
-		elif [ -f "${file1}.xz" ];  then file2="${file1}.xz"
+		if [ -f "${file1}.bz2" ] ;  then file2="${file1}.bz2"
+		elif [ -f "${file1}.gz" ] ; then file2="${file1}.gz"
+		elif [ -f "${file1}.lz" ] ; then file2="${file1}.lz"
+		elif [ -f "${file1}.xz" ] ; then file2="${file1}.xz"
 		else
 			echo "$0: Compressed version of ${file1} not found; use --help for usage." 1>&2
 			exit 1
@@ -119,28 +119,22 @@ fi
 prog1=
 prog2=
 bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
-if [ -f "${file1}" ]; then
+if [ -f "${file1}" ] ; then
 	prog_name=`"${bindir}"zutils -t -- "${file1}"`
 	case "${prog_name}" in
-	gzip)	prog1=gzip ;;
-	bzip2)	prog1=bzip2 ;;
-	lzip)	prog1=lzip ;;
-	xz)	prog1=xz ;;
+	bzip2 | gzip | lzip | xz) prog1=${prog_name} ;;
 	esac
 fi
-if [ -f "${file2}" ]; then
+if [ -f "${file2}" ] ; then
 	prog_name=`"${bindir}"zutils -t -- "${file2}"`
 	case "${prog_name}" in
-	gzip)	prog2=gzip ;;
-	bzip2)	prog2=bzip2 ;;
-	lzip)	prog2=lzip ;;
-	xz)	prog2=xz ;;
+	bzip2 | gzip | lzip | xz) prog2=${prog_name} ;;
 	esac
 fi
 
 retval=0
-if [ -n "${prog1}" ]; then
-	if [ -n "${prog2}" ]; then
+if [ -n "${prog1}" ] ; then
+	if [ -n "${prog2}" ] ; then
 		tmp_file=`mktemp "${TMPDIR:-/tmp}"/zdiff.XXXXXXXXXX` || {
 			echo 'cannot create a temporary file' 1>&2
 			exit 1
@@ -154,7 +148,7 @@ if [ -n "${prog1}" ]; then
 		retval=$?
 	fi
 else
-	if [ -n "${prog2}" ]; then
+	if [ -n "${prog2}" ] ; then
 		${prog2} -cdfq -- "${file2}" | ${diff_prog} ${args} -- "${file1}" -
 		retval=$?
 	else
diff --git a/zgrep.in b/zgrep.in
index df400c3..3298646 100644
--- a/zgrep.in
+++ b/zgrep.in
@@ -28,7 +28,7 @@ while [ x"$1" != x ] ; do
 		echo "specified, data is read from standard input, decompressed if needed, and"
 		echo "fed to grep. Data read from standard input must be of the same type; all"
 		echo "uncompressed or all compressed with the same compressor."
-		echo "The supported compressors are gzip, bzip2, lzip and xz."
+		echo "The supported compressors are bzip2, gzip, lzip and xz."
 		echo
 		echo "Zegrep is a shortcut for \"zgrep -E\""
 		echo "Zfgrep is a shortcut for \"zgrep -F\""
@@ -71,26 +71,23 @@ while [ x"$1" != x ] ; do
 	-?*)
 		args="${args} $1" ;;
 	 *)
-	 	if [ ${have_pat} = 0 ]; then args="${args} $1"; have_pat=1
+	 	if [ ${have_pat} = 0 ] ; then args="${args} $1"; have_pat=1
 		else break
 		fi ;;
 	esac
 	shift
 done
 
-if [ ${have_pat} = 0 ]; then
+if [ ${have_pat} = 0 ] ; then
 	echo "$0: Pattern not found; use --help for usage." 1>&2
 	exit 1
 fi
 
-if [ $# = 0 ]; then
+if [ $# = 0 ] ; then
 	bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
 	prog_name=`"${bindir}"zutils -t`
 	case "${prog_name}" in
-	gzip)	prog="gzip -cdfq" ;;
-	bzip2)	prog="bzip2 -cdfq" ;;
-	lzip)	prog="lzip -cdfq" ;;
-	xz)	prog="xz -cdfq" ;;
+	bzip2 | gzip | lzip | xz) prog="${prog_name} -cdfq" ;;
 	*)	prog=cat ;;
 	esac
 	{ "${bindir}"zutils -m ${prog_name} ; cat ; } | ${prog} | grep ${args}
@@ -101,30 +98,27 @@ retval=0
 for i in "$@" ; do
 	if [ "$i" = "--" ] && [ ${two_hyphens} = 0 ] ; then two_hyphens=1
 	else
-		if [ ! -f "$i" ]; then
-			if [ -f "$i.gz" ];    then i="$i.gz"
-			elif [ -f "$i.bz2" ]; then i="$i.bz2"
-			elif [ -f "$i.lz" ];  then i="$i.lz"
-			elif [ -f "$i.xz" ];  then i="$i.xz"
+		if [ ! -f "$i" ] ; then
+			if [ -f "$i.gz" ] ;    then i="$i.gz"
+			elif [ -f "$i.bz2" ] ; then i="$i.bz2"
+			elif [ -f "$i.lz" ] ;  then i="$i.lz"
+			elif [ -f "$i.xz" ] ;  then i="$i.xz"
 			else
 				echo "$0: File \"$i\" not found or not a regular file" 1>&2
-				if [ ${retval} = 0 ]; then retval=1 ; fi
+				if [ ${retval} = 0 ] ; then retval=1 ; fi
 				continue
 			fi
 		fi
 		bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
 		prog_name=`"${bindir}"zutils -t -- "$i"`
 		case "${prog_name}" in
-		gzip)	prog="gzip -cdfq" ;;
-		bzip2)	prog="bzip2 -cdfq" ;;
-		lzip)	prog="lzip -cdfq" ;;
-		xz)	prog="xz -cdfq" ;;
+		bzip2 | gzip | lzip | xz) prog="${prog_name} -cdfq" ;;
 		*)	prog=cat ;;
 		esac
-		if [ ${list} = 1 ]; then
+		if [ ${list} = 1 ] ; then
 			${prog} -- "$i" | grep ${args} 2>&1 > /dev/null && echo "$i"
 			r=$?
-		elif [ $# = 1 ] || [ ${no_name} = 1 ]; then
+		elif [ $# = 1 ] || [ ${no_name} = 1 ] ; then
 			${prog} -- "$i" | grep ${args}
 			r=$?
 		else
diff --git a/ztest.in b/ztest.in
new file mode 100644
index 0000000..f56c853
--- /dev/null
+++ b/ztest.in
@@ -0,0 +1,102 @@
+#! /bin/sh
+# Ztest - Test integrity of compressed files.
+# Copyright (C) 2009 Antonio Diaz Diaz.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+LC_ALL=C
+export LC_ALL
+args=
+recursive=0
+two_hyphens=0
+
+# Loop over args until a filename is found
+while [ x"$1" != x ] ; do
+
+	case "$1" in
+	--help | --he* | -h)
+		echo "Ztest - Test integrity of compressed files."
+		echo
+		echo "Ztest verifies the integrity of the specified compressed files."
+		echo "Non-compressed files are ignored. If no files are specified, the"
+		echo "integrity of compressed data read from standard input is verified. Data"
+		echo "read from standard input must be all compressed with the same compressor."
+		echo "The supported compressors are bzip2, gzip, lzip and xz."
+		echo
+		echo "Usage: $0 [OPTIONS] [FILES]"
+		echo
+		echo "The exit status is 1 if any compressed file is corrupt, 0 otherwise."
+		echo
+		echo "Options:"
+		echo "  -h, --help          display this help and exit"
+		echo "  -V, --version       output version information and exit"
+		echo "  -q, --quiet         suppress all messages"
+		echo "  -r, --recursive     operate recursively on directories"
+		echo "  -v, --verbose       be verbose (a 2nd -v gives more)"
+		echo
+		echo "Report bugs to zutils-bug@nongnu.org"
+		echo "Zutils home page: http://www.nongnu.org/zutils/zutils.html"
+		exit 0 ;;
+	--version | --ve* | -V)
+		echo "Ztest VERSION"
+		echo "Copyright (C) 2009 Antonio Diaz Diaz."
+		echo "This script is free software: you have unlimited permission"
+		echo "to copy, distribute and modify it."
+		exit 0 ;;
+	-r | --re*)
+		recursive=1 ;;
+	-v | -vv | -vvv | --ve* | -q | --qu*)
+		args="${args} $1" ;;
+	--)
+		shift ; two_hyphens=1 ; break ;;
+	- | -?*)
+		;;
+	 *)
+		break ;;
+	esac
+	shift
+done
+
+if [ $# = 0 ] ; then
+	bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
+	prog=`"${bindir}"zutils -t`
+	case "${prog}" in
+	bzip2 | gzip | lzip | xz)
+		;;
+	*)	echo "$0: Unknown data format read from stdin" 1>&2
+		exit 1 ;;
+	esac
+	{ "${bindir}"zutils -m ${prog} ; cat ; } | ${prog} -t ${args}
+	exit $?
+fi
+
+retval=0
+for i in "$@" ; do
+	if [ "$i" = "--" ] && [ ${two_hyphens} = 0 ] ; then two_hyphens=1
+	else
+		if [ ! -f "$i" ] ; then
+			if [ ${recursive} = 1 ] && [ -d "$i" ] ; then
+				bad_files=`find "$i" -type f \( -exec "$0" ${args} '{}' ';' -o -print \)`
+				if [ ${retval} = 0 ] && [ -n "${bad_files}" ] ; then retval=1 ; fi
+				continue
+			else
+				echo "$0: File \"$i\" not found or not a regular file" 1>&2
+				if [ ${retval} = 0 ] ; then retval=1 ; fi
+				continue
+			fi
+		fi
+		bindir=`echo "$0" | sed -e 's,[^/]*$,,'`
+		prog=`"${bindir}"zutils -t -- "$i"`
+		case "${prog}" in
+		bzip2 | gzip | lzip | xz)
+			;;
+		*)	continue ;;
+		esac
+		${prog} -t ${args} -- "$i"
+		r=$?
+		if [ $r != 0 ] ; then retval=$r ; fi
+	fi
+done
+
+exit ${retval}