108 lines
2.7 KiB
Text
108 lines
2.7 KiB
Text
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#! /bin/sh
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# Zcat - Cat wrapper for compressed files.
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# Copyright (C) 2009 Antonio Diaz Diaz.
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#
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# This script is free software: you have unlimited permission
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# to copy, distribute and modify it.
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LC_ALL=C
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export LC_ALL
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invocation_name=$0
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args=
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default_prog=lzip
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# Loop over args until pattern is found
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while [ x"$1" != x ] ; do
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case "$1" in
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--help | --he* | -h)
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echo "Zcat - Cat wrapper for compressed files."
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echo
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echo "Zcat is a wrapper script around the cat command that allows"
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echo "transparent concatenation of any combination of compressed and"
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echo "non-compressed files. If any given file is compressed, its uncompressed"
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echo "content is used. If a given file does not exist, zcat tries the"
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echo "compressed file name corresponding to the default compressor selected."
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echo "The supported compressors are gzip, bzip2, lzip and xz."
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echo
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echo "Usage: ${invocation_name} [OPTIONS] [CAT_OPTIONS] [FILES]"
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echo
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echo "CAT_OPTIONS are passed directly to cat."
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echo "The exit status from cat is preserved."
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echo
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echo "Options:"
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echo " -h, --help display this help and exit"
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echo " -V, --version output version information and exit"
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echo " --gzip use gzip as default decompressor"
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echo " --bzip2 use bzip2 as default decompressor"
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echo " --lzip use lzip as default decompressor (default)"
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echo " --xz use xz as default decompressor"
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echo
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echo "Report bugs to lzip-bug@nongnu.org"
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echo "Lzip home page: http://www.nongnu.org/lzip/lzip.html"
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exit 0 ;;
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--version | --ve* | -V)
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echo "Zcat VERSION"
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echo "Copyright (C) 2009 Antonio Diaz Diaz."
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echo "This script is free software: you have unlimited permission"
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echo "to copy, distribute and modify it."
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exit 0 ;;
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--gz*)
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default_prog=gzip ;;
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--bz*)
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default_prog=bzip2 ;;
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--lz*)
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default_prog=lzip ;;
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--xz*)
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default_prog=xz ;;
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-)
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;;
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--)
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shift; break ;;
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-?*)
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args="${args} $1" ;;
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*)
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break ;;
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esac
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shift
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done
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if test $# -eq 0; then
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${default_prog} -cd | cat ${args}
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exit $?
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fi
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retval=0
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for i in "$@" ; do
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prog="${default_prog} -cdfq"
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case "$i" in
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*.gz | *.tgz)
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prog="gzip -cdfq" ;;
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*.bz2 | *.tbz | *.tbz2)
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prog="bzip2 -cdfq" ;;
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*.lz | *.tlz)
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prog="lzip -cdfq" ;;
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*.xz | *.txz)
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prog="xz -cdfq" ;;
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*)
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if test -f "$i"; then prog=cat
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else
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case ${default_prog} in
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gzip)
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if test -f "$i.gz"; then i="$i.gz"; fi ;;
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bzip2)
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if test -f "$i.bz2"; then i="$i.bz2"; fi ;;
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lzip)
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if test -f "$i.lz"; then i="$i.lz"; fi ;;
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xz)
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if test -f "$i.xz"; then i="$i.xz"; fi ;;
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esac
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fi ;;
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esac
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${prog} -- "$i" | cat ${args}
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r=$?
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test "$r" -ne 0 && retval="$r"
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done
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exit ${retval}
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