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#! /bin/sh
# Lzgrep - Grep wrapper for compressed files.
# Copyright (C) 2008, 2009 Antonio Diaz Diaz.
#
# This script is free software: you have unlimited permission
# to copy, distribute and modify it.
invocation_name=$0
args=
default_prog=lzip
have_pat=0
list=0
no_name=0
# Loop over args until pattern is found
while [ x"$1" != x ] ; do
case "$1" in
--help | --he* | -h)
echo "Lzgrep - Grep wrapper for compressed files."
echo
echo "Lzgrep is a wrapper script around the grep command that allows"
echo "transparent search on any combination of compressed and non-compressed"
echo "files. If any given file is compressed, its uncompressed content is"
echo "used. If a given file does not exist, lzgrep tries the compressed file"
echo "name corresponding to the default compressor selected. The supported"
echo "compressors are gzip, bzip2 and lzip."
echo
echo "Usage: ${invocation_name} [OPTIONS] [GREP_OPTIONS] PATTERN [FILES]"
echo
echo "GREP_OPTIONS are passed directly to grep."
echo "The exit status from grep is preserved."
echo
echo "Options:"
echo " -h, --help display this help and exit"
echo " -V, --version output version information and exit"
echo " --gzip use gzip as default decompressor"
echo " --bzip2 use bzip2 as default decompressor"
echo " --lzip use lzip as default decompressor (default)"
exit 0 ;;
--version | --ve* | -V)
echo "Lzgrep 0.3"
echo "Copyright (C) 2009 Antonio Diaz Diaz."
echo "This script is free software: you have unlimited permission"
echo "to copy, distribute and modify it."
exit 0 ;;
--gz*)
default_prog=gzip ;;
--bz*)
default_prog=bzip2 ;;
--lz*)
default_prog=lzip ;;
-[drRzZ] | --di* | --exc* | --inc* | --nu* | --rec*)
echo "${invocation_name}: option $1 not supported\n"
exit 1 ;;
-e?* | -f?* | --file=* | --reg*=*)
args="${args} $1"; have_pat=1 ;;
-e | -f | --file | --reg*)
args="${args} $1 $2"; shift; have_pat=1 ;;
--*=*)
args="${args} $1" ;;
-[ABCDm] | --af* | --be* | --binary-* | --con* | --de* | --[lm]a*)
args="${args} $1 $2"; shift ;;
-l | --files-with-*)
args="${args} $1"; list=1 ;;
-h | --no-f*)
args="${args} $1"; no_name=1 ;;
--)
break ;;
-?*)
args="${args} $1" ;;
*)
if test ${have_pat} = 0; then args="${args} $1"; have_pat=1
else break
fi ;;
esac
shift
done
if test ${have_pat} = 0; then
echo "${invocation_name}: Pattern not found; use --help for usage." 1>&2
exit 1
fi
if test $# -eq 0; then
${default_prog} -cdfq | grep ${args}
exit $?
fi
retval=0
for i in "$@" ; do
prog="${default_prog} -cdfq"
case "$i" in
*.gz | *.tgz)
prog="gzip -cdfq" ;;
*.bz2 | *.tbz2)
prog="bzip2 -cdfq" ;;
*.lz | *.tlz)
prog="lzip -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 ;;
esac
fi ;;
esac
if test ${list} -eq 1; then
${prog} -- "$i" | grep ${args} 2>&1 > /dev/null && echo $i
r=$?
elif test $# -eq 1 -o ${no_name} -eq 1; then
${prog} -- "$i" | grep ${args}
r=$?
else
j=${i//\\/\\\\}
j=${j//|/\\|}
j=${j//&/\\&}
j=`printf "%s" "$j" | tr '\n' ' '`
${prog} -- "$i" | grep ${args} | sed "s|^|${j}:|"
r=$?
fi
test "$r" -ne 0 && retval="$r"
done
exit ${retval}
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