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Diffstat (limited to 'sys-apps/less/files/lesspipe.sh')
| -rw-r--r-- | sys-apps/less/files/lesspipe.sh | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/sys-apps/less/files/lesspipe.sh b/sys-apps/less/files/lesspipe.sh new file mode 100644 index 00000000..6edaa3ce --- /dev/null +++ b/sys-apps/less/files/lesspipe.sh @@ -0,0 +1,274 @@ +#!/bin/bash +# +# Preprocessor for 'less'. Used when this environment variable is set: +# LESSOPEN="|lesspipe %s" + +# TODO: handle compressed files better + +[[ -n ${LESSDEBUG} ]] && set -x + +trap 'exit 0' PIPE + +guesscompress() { + case "$1" in + *.gz|*.z) echo "gunzip -c" ;; + *.bz2|*.bz) echo "bunzip2 -c" ;; + *.lz) echo "lzip -dc" ;; + *.lzma) echo "unlzma -c" ;; + *.lzo) echo "lzop -dc" ;; + *.xz) echo "xzdec" ;; + *) echo "cat" ;; + esac +} + +lesspipe_file() { + local out=$(file -L -- "$1") + local suffix + case ${out} in + *" 7-zip archive"*) suffix="7z";; + *" ar archive"*) suffix="a";; + *" CAB-Installer"*) suffix="cab";; + *" cpio archive"*) suffix="cpio";; + *" ELF "*) suffix="elf";; + *" LHa"*archive*) suffix="lha";; + *" troff "*) suffix="man";; + *" script text"*) suffix="sh";; + *" shared object"*) suffix="so";; + *" tar archive"*) suffix="tar";; + *" Zip archive"*) suffix="zip";; + *": data") hexdump -C -- "$1"; return 0;; + *) return 1;; + esac + lesspipe "$1" ".${suffix}" + return 0 +} + +lesspipe() { + local match=$2 + [[ -z ${match} ]] && match=$1 + + local DECOMPRESSOR=$(guesscompress "${match}") + + # User filters + if [[ -x ~/.lessfilter ]] ; then + ~/.lessfilter "$1" && exit 0 + fi + + local ignore + for ignore in ${LESSIGNORE} ; do + [[ ${match} == *.${ignore} ]] && exit 0 + done + + case "${match}" in + + ### Doc files ### + *.[0-9n]|*.man|\ + *.[0-9n].bz2|*.man.bz2|\ + *.[0-9n].gz|*.man.gz|\ + *.[0-9n].lzma|*.man.lzma|\ + *.[0-9n].xz|*.man.xz|\ + *.[0-9][a-z].gz|*.[0-9][a-z].gz) + local out=$(${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" ;; + *.conf|*.txt|*.log) ;; # force less to work on these directly #150256 + + ### 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.bz2|*.tar.bz|*.tar.gz|*.tar.z|\ + *.tar.lz|*.tar.tlz|\ + *.tar.lzma|*.tar.xz) + ${DECOMPRESSOR} -- "$1" | tar tvvf -;; + *.tbz2|*.tbz|*.tgz|*.tlz|*.txz) + lesspipe "$1" "$1".tar.${1##*.t} ;; + + ### Misc archives ### + *.bz2|\ + *.gz|*.z|\ + *.lz|\ + *.lzma|*.xz) ${DECOMPRESSOR} -- "$1" ;; + *.rpm) rpm -qpivl --changelog -- "$1" || rpm2tar -O "$1" | tar tvvf -;; + *.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" || unzoo -l "$1" ;; + *.7z|*.exe) 7z l -- "$1" || 7za l -- "$1" || 7zr l -- "$1" ;; + *.a) ar tv "$1" ;; + *.elf) readelf -a -W -- "$1" ;; + *.so) readelf -h -d -s -W -- "$1" ;; + *.mo|*.gmo) msgunfmt -- "$1" ;; + + *.rar|.r[0-9][0-9]) unrar l -- "$1" ;; + + *.jar|*.war|*.ear|*.xpi|*.zip) + unzip -v "$1" || miniunzip -l "$1" || miniunz -l "$1" || zipinfo -v "$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 + ;; + + ### Filesystems ### + *.squashfs) unsquashfs -s "$1" && unsquashfs -ll "$1" ;; + + ### Media ### + *.bmp|*.gif|*.jpeg|*.jpg|*.ico|*.pcd|*.pcx|*.png|*.ppm|*.tga|*.tiff|*.tif|*.webp) + identify "$1" || file -L -- "$1" + ;; + *.asf|*.avi|*.mov|*.mp4|*.mpeg|*.mpg|*.qt|*.ram|*.rm|*.webm|*.wmv) + midentify "$1" || file -L -- "$1" + ;; + *.mp3) mp3info "$1" || id3info "$1" ;; + *.ogg) ogginfo "$1" ;; + *.flac) metaflac --list "$1" ;; + *.torrent) torrentinfo "$1" || torrentinfo-console "$1" || ctorrent -x "$1" ;; + *.bin|*.cue|*.raw) + # not all .bin/.raw files are cd images #285507 + # fall back to lesspipe_file if .cue doesn't exist, or if + # cd-info failed to parse things sanely + [[ -e ${1%.*}.cue ]] \ + && cd-info --no-header --no-device-info "$1" \ + || lesspipe_file "$1" + ;; + *.iso) + iso_info=$(isoinfo -d -i "$1") + echo "${iso_info}" + # Joliet output overrides Rock Ridge, so prefer the better Rock + case ${iso_info} in + *$'\n'"Rock Ridge"*) iso_opts="-R";; + *$'\n'"Joliet"*) iso_opts="-J";; + *) iso_opts="";; + esac + isoinfo -l ${iso_opts} -i "$1" + ;; + + ### Encryption stuff ### + *.crl) openssl crl -hash -text -noout -in "$1" ;; + *.csr) openssl req -text -noout -in "$1" ;; + *.crt|*.pem) openssl x509 -hash -text -noout -in "$1" ;; + +# May not be such a good idea :) +# ### Device nodes ### +# /dev/[hs]d[a-z]*) +# fdisk -l "${1:0:8}" +# [[ $1 == *hd* ]] && hdparm -I "${1:0:8}" +# ;; + + ### Everything else ### + *) + case $(( recur++ )) in + # Maybe we didn't match due to case issues ... + 0) lesspipe "$1" "$(echo $1 | LC_ALL=C tr '[:upper:]' '[:lower:]')" ;; + + # Maybe we didn't match because the file is named weird ... + 1) lesspipe_file "$1" ;; + esac + + # So no matches from above ... finally fall back to an external + # coloring package. No matching here so we don't have to worry + # about keeping in sync with random packages. Any coloring tool + # you use should not output errors about unsupported files to + # stdout. If it does, it's your problem. + + # Allow people to flip color off if they dont want it + case ${LESSCOLOR} in + always) LESSCOLOR=2;; + [yY][eE][sS]|[yY]|1|true) LESSCOLOR=1;; + [nN][oO]|[nN]|0|false) LESSCOLOR=0;; + *) LESSCOLOR=0;; # default to no color #188835 + esac + if [[ ${LESSCOLOR} != "0" ]] && [[ -n ${LESSCOLORIZER=code2color} ]] ; then + # 2: Only colorize if user forces it ... + # 1: ... or we know less will handle raw codes -- this will + # not detect -seiRM, so set LESSCOLORIZER yourself + if [[ ${LESSCOLOR} == "2" ]] || [[ " ${LESS} " == *" -"[rR]" "* ]] ; then + LESSQUIET=true ${LESSCOLORIZER} "$1" + fi + fi + + # Nothing left to do but let less deal + exit 0 + ;; + esac +} + +if [[ -z $1 ]] ; then + echo "Usage: lesspipe <file>" +elif [[ $1 == "-V" || $1 == "--version" ]] ; then + Id="cvsid" + cat <<-EOF + $Id$ + Copyright 2001-2013 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: preprocess files before sending them to less + + Usage: lesspipe <file> + + lesspipe specific settings: + LESSCOLOR env - toggle colorizing of output (no/yes/always) + LESSCOLORIZER env - program used to colorize output (default: code2color) + LESSIGNORE - list of extensions to ignore (don't do anything fancy) + + You can create per-user filters as well by creating the executable file: + ~/.lessfilter + One argument is passed to it: the file to display. + + To use lesspipe, simply add to your environment: + export LESSOPEN="|lesspipe %s" + + Run 'less --help' or 'man less' for more info + EOF +elif [[ -d $1 ]] ; then + ls -alF -- "$1" +else + recur=0 + [[ -n ${LESSDEBUG} ]] \ + && lesspipe "$1" \ + || lesspipe "$1" 2> /dev/null +fi |