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#!/bin/bash
#
# Preprocessor for 'less'. Used when this environment variable is set:
# LESSOPEN="|lesspipe.sh %s"
# TODO: handle compressed files better
trap 'exit 0' PIPE
guesscompress() {
case "$1" in
*.gz) echo "gunzip -c" ;;
*.bz2) echo "bunzip2 -c" ;;
*.Z) echo "compress -d" ;;
*) echo "cat" ;;
esac
}
lesspipe_file() {
local out=$(file -L -- "$1")
case ${out} in
*" ar archive"*) lesspipe "$1" ".a" ;;
*" tar archive"*) lesspipe "$1" ".tar" ;;
*" CAB-Installer"*) lesspipe "$1" ".cab" ;;
*" troff "*) lesspipe "$1" ".man" ;;
*" shared object"*) lesspipe "$1" ".so" ;;
*" Zip archive"*) lesspipe "$1" ".zip" ;;
*" LHa"*archive*) lesspipe "$1" ".lha" ;;
*" ELF "*) readelf -a -- "$1" ;;
*": data") hexdump -C -- "$1" ;;
*) return 1 ;;
esac
return 0
}
lesspipe() {
local match=$2
[[ -z ${match} ]] && match=$1
local DECOMPRESSOR=$(guesscompress "$match")
case "$match" in
### Doc files ###
*.[0-9n]|*.man|\
*.[0-9n].bz2|*.man.bz2|\
*.[0-9n].gz|*.man.gz|\
*.[0-9][a-z].gz|*.[0-9][a-z].gz)
local out=$(${DECOMPRESSOR} -- "$1" | file -)
case ${out} in
*troff*)
# Need to make sure we pass path to man or it will try
# to locate "$1" in the man search paths
if [[ $1 == /* ]] ; then
man -- "$1"
else
man -- "./$1"
fi
;;
*text*)
${DECOMPRESSOR} -- "$1"
;;
*)
# We could have matched a library (libc.so.6), so let
# `file` figure out what the hell this thing is
lesspipe_file "$1"
;;
esac
;;
*.dvi) dvi2tty "$1" ;;
*.ps|*.pdf) ps2ascii "$1" || pstotext "$1" || pdftotext "$1" ;;
*.doc) antiword "$1" || catdoc "$1" ;;
*.rtf) unrtf --nopict --text "$1" ;;
### URLs ###
ftp://*|http://*|*.htm|*.html)
for b in links2 links lynx ; do
${b} -dump "$1" && exit 0
done
html2text -style pretty "$1"
;;
### Tar files ###
*.tar) tar tvvf "$1" ;;
*.tar.bz2|*.tbz2|*.tbz) tar tjvvf "$1" ;;
*.tar.gz|*.tgz|*.tar.z) tar tzvvf "$1" ;;
### Misc archives ###
*.bz2) bzip2 -dc -- "$1" ;;
*.gz|*.z) gzip -dc -- "$1" ;;
*.zip) unzip -l "$1" ;;
*.rpm) rpm -qpivl --changelog -- "$1" ;;
*.cpi|*.cpio) cpio -itv < "$1" ;;
*.ace) unace l -- "$1" ;;
*.arc) arc v "$1" ;;
*.arj) unarj l -- "$1" ;;
*.cab) cabextract -l -- "$1" ;;
*.lha|*.lzh) lha v "$1" ;;
*.zoo) zoo -list "$1" ;;
*.7z) 7z l -- "$1" ;;
*.a) ar tv "$1" ;;
*.so) readelf -h -d -s -- "$1" ;;
*.rar|.r[0-9][0-9]) unrar l -- "$1" ;;
*.deb|*.udeb)
if type -p dpkg > /dev/null ; then
dpkg --info "$1"
dpkg --contents "$1"
else
ar tv "$1"
ar p "$1" data.tar.gz | tar tzvvf -
fi
;;
### Media ###
*.bmp|*.gif|*.jpeg|*.jpg|*.pcd|*.pcx|*.png|*.ppm|*.tga|*.tiff|*.tif)
identify "$1" || file -L -- "$1"
;;
*.avi|*.mpeg|*.mpg|*.mov|*.qt|*.wmv|*.asf|*.rm|*.ram)
midentify "$1" || file -L -- "$1"
;;
*.mp3) mp3info "$1" || id3info "$1" ;;
*.ogg) ogginfo "$1" ;;
*.flac) metaflac --list "$1" ;;
*.iso) isoinfo -d -i "$1" ; isoinfo -l -i "$1" ;;
*.bin|*.cue) cd-info --no-header --no-device-info "$1" ;;
### Source code ###
*.awk|*.groff|*.java|*.js|*.m4|*.php|*.pl|*.pm|*.pod|*.sh|\
*.ad[asb]|*.asm|*.inc|*.[ch]|*.[ch]pp|*.[ch]xx|*.cc|*.hh|\
*.lsp|*.l|*.pas|*.p|*.xml|*.xps|*.xsl|*.axp|*.ppd|*.pov|\
*.diff|*.patch|*.py|*.rb|*.sql)
# Allow people to flip color off if they dont want it
case ${LESSCOLOR} in
[yY][eE][sS]|1|true) LESSCOLOR=1;;
[nN][oO]|0|false) LESSCOLOR=0;;
*) LESSCOLOR=1;; # default to colorize
esac
[[ ${LESSCOLORIZER+set} != "set" ]] && LESSCOLORIZER=code2color
if [[ ${LESSCOLOR} == "0" ]] || [[ -z ${LESSCOLORIZER} ]] ; then
# let less itself handle these files
exit 0
fi
# Only colorize if we know less will handle raw codes
for opt in ${LESS} ; do
if [[ ${opt} == "-r" || ${opt} == "-R" ]] ; then
${LESSCOLORIZER} "$1"
break
fi
done
;;
# May not be such a good idea :)
# ### Device nodes ###
# /dev/[hs]d[a-z]*)
# fdisk -l "${1:0:8}"
# [[ $1 == *hd* ]] && hdparm -I "${1:0:8}"
# ;;
### Everything else ###
*)
# Sanity check
[[ ${recur} == 2 ]] && exit 0
# Maybe we didn't match due to case issues ...
if [[ ${recur} == 0 ]] ; then
recur=1
lesspipe "$1" "$(echo $1 | tr '[:upper:]' '[:lower:]')"
# Maybe we didn't match because the file is named weird ...
else
recur=2
lesspipe_file "$1"
fi
exit 0
;;
esac
}
if [[ -z $1 ]] ; then
echo "Usage: lesspipe.sh <file>"
elif [[ $1 == "-V" ]] ; then
Id="cvsid"
cvsid="$Id: lesspipe.sh,v 1.13 2005/11/26 00:32:53 vapier Exp $"
cat <<-EOF
$cvsid
Copyright 2001-2005 Gentoo Foundation
Mike Frysinger <vapier@gentoo.org>
(with plenty of ideas stolen from other projects/distros)
EOF
less -V
elif [[ $1 == "-h" || $1 == "--help" ]] ; then
cat <<-EOF
lesspipe.sh: preproccess files before sending them to less
Usage: lesspipe.sh <file>
lesspipe.sh specific settings:
LESSCOLOR env - toggle colorizing of output
LESSCOLORIZER env - program used to colorize output (default: code2color)
Run 'less --help' or 'man less' for more info
EOF
elif [[ -d $1 ]] ; then
ls -alF -- "$1"
else
recur=0
lesspipe "$1" 2> /dev/null
fi
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