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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
invocation_name=$0
args=
default_prog=lzip
# Loop over args until pattern 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 name corresponding to the default compressor selected."
echo "The supported compressors are gzip, bzip2, lzip and xz."
echo
echo "Usage: ${invocation_name} [OPTIONS] [CAT_OPTIONS] [FILES]"
echo
echo "CAT_OPTIONS are passed directly to cat."
echo "The exit status from cat is preserved."
echo
echo "Options:"
echo " -h, --help display this help and exit"
echo " -V, --version output version information and exit"
echo " --gzip use gzip as default decompressor"
echo " --bzip2 use bzip2 as default decompressor"
echo " --lzip use lzip as default decompressor (default)"
echo " --xz use xz as default decompressor"
echo
echo "Report bugs to lzip-bug@nongnu.org"
echo "Lzip home page: http://www.nongnu.org/lzip/lzip.html"
exit 0 ;;
--version | --ve* | -V)
echo "Zcat VERSION"
echo "Copyright (C) 2009 Antonio Diaz Diaz."
echo "This script is free software: you have unlimited permission"
echo "to copy, distribute and modify it."
exit 0 ;;
--gz*)
default_prog=gzip ;;
--bz*)
default_prog=bzip2 ;;
--lz*)
default_prog=lzip ;;
--xz*)
default_prog=xz ;;
-)
;;
--)
shift; break ;;
-?*)
args="${args} $1" ;;
*)
break ;;
esac
shift
done
if test $# -eq 0; then
${default_prog} -cd | cat ${args}
exit $?
fi
retval=0
for i in "$@" ; do
prog="${default_prog} -cdfq"
case "$i" in
*.gz | *.tgz)
prog="gzip -cdfq" ;;
*.bz2 | *.tbz | *.tbz2)
prog="bzip2 -cdfq" ;;
*.lz | *.tlz)
prog="lzip -cdfq" ;;
*.xz | *.txz)
prog="xz -cdfq" ;;
*)
if test -f "$i"; then prog=cat
else
case ${default_prog} in
gzip)
if test -f "$i.gz"; then i="$i.gz"; fi ;;
bzip2)
if test -f "$i.bz2"; then i="$i.bz2"; fi ;;
lzip)
if test -f "$i.lz"; then i="$i.lz"; fi ;;
xz)
if test -f "$i.xz"; then i="$i.xz"; fi ;;
esac
fi ;;
esac
${prog} -- "$i" | cat ${args}
r=$?
test "$r" -ne 0 && retval="$r"
done
exit ${retval}
|
