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|
#! /bin/sh
# Zcat - Cat wrapper for 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=
two_hyphens=0
# Loop over args until a filename is found
while [ x"$1" != x ] ; do
case "$1" in
--help | --he* | -h)
echo "Zcat - Cat wrapper for compressed files."
echo
echo "Zcat is a wrapper script around the cat command that allows"
echo "transparent concatenation of any combination of compressed and"
echo "non-compressed files. If any given file is compressed, its uncompressed"
echo "content is used. If a given file does not exist, zcat tries the"
echo "compressed file names corresponding to the supported compressors."
echo "The supported compressors are gzip, bzip2, lzip and xz."
echo
echo "Usage: $0 [OPTIONS] [CAT_OPTIONS] [FILES]"
echo
echo "CAT_OPTIONS are passed directly to cat."
echo "The exit status from cat is preserved."
echo
echo "Options:"
echo " -h, --help display this help and exit"
echo " -V, --version output version information and exit"
echo
echo "Report bugs to zutils-bug@nongnu.org"
echo "Zutils home page: http://www.nongnu.org/zutils/zutils.html"
exit 0 ;;
--version | --ve* | -V)
echo "Zcat VERSION"
echo "Copyright (C) 2009 Antonio Diaz Diaz."
echo "This script is free software: you have unlimited permission"
echo "to copy, distribute and modify it."
exit 0 ;;
-)
;;
--)
shift ; two_hyphens=1 ; break ;;
-?*)
args="${args} $1" ;;
*)
break ;;
esac
shift
done
retval=0
for i in "$@" ; 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"
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_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" ;;
*) prog=cat ;;
esac
${prog} -- "$i" | cat ${args}
r=$?
if [ $r != 0 ]; then retval=$r ; fi
fi
done
exit ${retval}
|
