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#!/bin/sh
#
# lessfile/lesspipe
# $Id: lessopen,v 1.4 1998/05/12 09:37:46 torin Exp $
# Plus POSIX sh changes by Y.Dirson
#
# Less filter for viewing non text files.
#
# Written by: Behan Webster <behanw@pobox.com>
# Many Modifications by Darren Stalder
# Further Modifications by Thomas Schoepf <schoepf@debian.org>
#
# combined lessfile and lesspipe to avoid duplication of decode stage
# shell is sure icky. I'm real tempted to rewrite the whole thing in Perl
#
# Unfortunately, this means that I have filename dependencies sprinkled
# throughout the code. If you don't want lessfile to be called that,
# you'll need to change the LESSFILE envar below.
#
# Usage: eval `lessfile` or eval `lesspipe`
#
# less passes in:
# $1 filename to be viewed with less (used by LESSOPEN)
# and possibly (if used by lessfile)
# $2 filename that was created during LESSOPEN
TMPDIR=${TMPDIR:-/tmp}
CONFIGDIR=${XDG_CONFIG_HOME:-~/.config}
BASENAME=`basename $0`
LESSFILE=lessfile
# Helper function to list contents of ISO files (CD images)
iso_list() {
isoinfo -d -i "$1"
isoinfo -d -i "$1" | grep -q ^Rock\.Ridge && iiopts="$iiopts -R"
isoinfo -d -i "$1" | grep -q ^Joliet && iiopts="$iiopts -J"
echo
isoinfo -f $iiopts -i "$1"
}
if [ $# -eq 1 ] ; then
# we were called as LESSOPEN
# if the file doesn't exist, we don't do anything
if [ ! -r "$1" ]; then
exit 0
fi
# generate filename for possible use by lesspipe
umask 077
if [ $BASENAME = $LESSFILE ]; then
TMPFILE=`mktemp -p $TMPDIR lessfXXXXXX`
if [ -z "$TMPFILE" ]; then
echo >&2 "TMPFILE variable is empty. Exiting"
exit 1
fi
fi
(
# Allow for user defined filters
USERFILTER=
if [ -x "$CONFIGDIR/lessfilter" ]; then
USERFILTER="$CONFIGDIR/lessfilter"
elif [ -x ~/.lessfilter ]; then
USERFILTER=~/.lessfilter
fi
if [ -n "$USERFILTER" ]; then
if [ $BASENAME = $LESSFILE ]; then
"$USERFILTER" "$1" > $TMPFILE
if [ $? -eq 0 ]; then
if [ -s $TMPFILE ]; then
echo $TMPFILE
else
rm -f $TMPFILE
fi
exit 0
else
rm -f $TMPFILE
fi
else
"$USERFILTER" "$1" && exit 0
fi
fi
# possibly redirect stdout to a file for lessfile
if [ $BASENAME = $LESSFILE ]; then exec > $TMPFILE; fi
# Decode file for less
case `echo "$1" | tr '[:upper:]' '[:lower:]'` in
*.a)
if [ -x "`which ar`" ]; then ar tv "$1"
else echo "No ar available"; fi ;;
*.arj)
if [ -x "`which unarj`" ]; then unarj l "$1"
else echo "No unarj available"; fi ;;
*.tar.bz2)
if [ -x "`which bunzip2`" ]; then
bunzip2 -dc "$1" | tar tvvf -
else echo "No bunzip2 available"; fi ;;
*.bz)
if [ -x "`which bunzip`" ]; then bunzip -c "$1"
else echo "No bunzip available"; fi ;;
*.bz2)
if [ -x "`which bunzip2`" ]; then bunzip2 -dc "$1"
else echo "No bunzip2 available"; fi ;;
*.deb|*.udeb|*.ddeb|*.ipk)
echo "$1:"; dpkg --info "$1"
echo
echo '*** Contents:'; dpkg-deb --contents "$1"
;;
*.doc)
if [ -x "`which catdoc`" ]; then
catdoc "$1"
else
# no catdoc, read normally if file is text.
if ( file "$1" | grep ASCII 2>/dev/null >/dev/null); then
cat "$1"
else
echo "No catdoc available";
fi
fi
;;
*.egg)
if [ -x "`which unzip`" ]; then
unzip -p "$1" EGG-INFO/PKG-INFO | \
sed '/^Description:/,/^\S/{/^Description:/d; /^\S/b; d}'
echo
unzip -v "$1"
else
echo "No unzip available"
fi
;;
*.gif|*.jpeg|*.jpg|*.pcd|*.png|*.tga|*.tiff|*.tif)
if [ -x "`which identify`" ]; then
identify "$1"
else
echo "No identify available"
echo "Install ImageMagick to browse images"
fi
;;
*.iso)
if [ -x "`which isoinfo`" ]; then iso_list "$1"
else
echo "No isoinfo available"
echo "Install mkisofs to view ISO images"
fi
;;
*.bin|*.raw)
if [ -x "`which isoinfo`" ]; then
file "$1" | grep -q ISO\.9660 && iso_list "$1"
else
echo "No isoinfo available"
echo "Install mkisofs to view ISO images"
fi
;;
*.lha|*.lzh)
if [ -x "`which lha`" ]; then lha v "$1"
else echo "No lha available"; fi ;;
*.tar.lz|*.tlz)
if [ -x "`which lzip`" ]; then
lzip -dc "$1" | tar tvvf -
elif [ -x "`which lunzip`" ]; then
lunzip -dc "$1" | tar tvvf -
else echo "No lzip or lunzip available"; fi ;;
*.lz)
if [ -x "`which lzip`" ]; then lzip -dc "$1"
elif [ -x "`which lunzip`" ]; then lunzip -dc "$1"
else echo "No lzip or lunzip available"; fi ;;
*.tar.lzma)
if [ -x "`which lzma`" ]; then
lzma -dc "$1" | tar tfvv -
else
echo "No lzma available"
fi
;;
*.lzma)
if [ -x "`which lzma`" ]; then
lzma -dc "$1"
else
echo "No lzma available"
fi
;;
*.pdf)
if [ -x "`which pdftotext`" ]; then pdftotext -layout "$1" -
else echo "No pdftotext available"; fi ;;
*.rar|*.r[0-9][0-9])
if [ -x "`which rar`" ]; then rar v "$1"
elif [ -x "`which unrar`" ]; then unrar v "$1"
else echo "No rar or unrar available"; fi ;;
*.rpm)
if [ -x "`which rpm`" ]; then
echo "$1:"; rpm -q -i -p "$1"
echo
echo '*** Contents:'
rpm -q -l -p "$1"
else echo "rpm isn't available, no query on rpm package possible"; fi ;;
*.snap)
if [ -x "`which snap`" ]; then snap info "$1"; fi
if [ -x "`which unsquashfs`" ]; then
echo
echo '*** Contents:'; unsquashfs -ll -d '' "$1"
else echo "No unsquashfs available"; fi ;;
*.tar.gz|*.tgz|*.tar.z|*.tar.dz)
tar tzvf "$1" --force-local
;;
*.tar.xz|*.txz)
if [ -x "`which xz`" ]; then
xz -dc "$1" | tar tfvv -
else
echo "No xz available"
fi
;;
*.tar.zst|*.tzst)
if [ -x "`which zstd`" ]; then
zstd -qdc "$1" | tar tfvv -
else
echo "No zstd available"
fi
;;
*.whl)
if [ -x "`which unzip`" ]; then
unzip -p "$1" '*.dist-info/METADATA' | sed '/^$/q'
unzip -v "$1"
else
echo "No unzip available"
fi
;;
*.xz)
if [ -x "`which xz`" ]; then
xz -dc "$1"
else
echo "No xz available"
fi
;;
*.zst)
if [ -x "`which zstd`" ]; then
zstd -qdc "$1"
else
echo "No zstd available"
fi
;;
# Note that this is out of alpha order so that we don't catch
# the gzipped tar files.
*.gz|*.z|*.dz)
gzip -dc "$1" ;;
*.tar)
tar tvf "$1" --force-local
;;
*.jar|*.war|*.ear|*.xpi|*.zip)
if [ -x "`which unzip`" ]; then unzip -v "$1";
elif [ -x "`which miniunzip`" ]; then miniunzip -l "$1";
elif [ -x "`which miniunz`" ]; then miniunz -l "$1";
else echo "No unzip, miniunzip or miniunz available"; fi ;;
*.7z)
if [ -x "`which 7za`" ]; then 7za l "$1";
elif [ -x "`which 7zr`" ]; then 7zr l "$1";
else echo "No 7za or 7zr available"; fi ;;
*.zoo)
if [ -x "`which zoo`" ]; then zoo v "$1";
elif [ -x "`which unzoo`" ]; then unzoo -l "$1";
else echo "No unzoo or zoo available"; fi ;;
esac
) 2>/dev/null
if [ $BASENAME = $LESSFILE ]; then
if [ -s $TMPFILE ]; then
echo $TMPFILE
else
rm -f $TMPFILE
fi
fi
elif [ $# -eq 2 ] ; then
#
# we were called as LESSCLOSE
# delete the file created if we were lessfile
#
if [ $BASENAME = $LESSFILE ]; then
if [ -n "$BASH" ]; then
if [ ! -O "$2" ]; then
echo "Error in deleting $2" > /dev/tty
exit 1
fi
fi
if [ -f "$2" ]; then
rm -f "$2"
else
echo "Error in deleting $2" > /dev/tty
fi
fi
elif [ $# -eq 0 ] ; then
#
# must setup shell to use LESSOPEN/LESSCLOSE
#
# I have no idea how some of the more esoteric shells (es, rc) do
# things. If they don't do things in a Bourne manner, send me a patch
# and I'll incorporate it.
#
# first determine the full path of lessfile/lesspipe
# if you can determine a better way to do this, send me a patch, I've
# not shell-scripted for many a year.
FULLPATH=`cd \`dirname $0\`;pwd`/$BASENAME
case "$SHELL" in
*csh)
if [ $BASENAME = $LESSFILE ]; then
echo "setenv LESSOPEN \"$FULLPATH %s\";"
echo "setenv LESSCLOSE \"$FULLPATH %s %s\";"
else
echo "setenv LESSOPEN \"| $FULLPATH %s\";"
echo "setenv LESSCLOSE \"$FULLPATH %s %s\";"
fi
;;
*)
if [ $BASENAME = $LESSFILE ]; then
echo "export LESSOPEN=\"$FULLPATH %s\";"
echo "export LESSCLOSE=\"$FULLPATH %s %s\";"
else
echo "export LESSOPEN=\"| $FULLPATH %s\";"
echo "export LESSCLOSE=\"$FULLPATH %s %s\";"
fi
;;
esac
#echo "# If you tried to view a file with a name that starts with '#', you"
#echo "# might see this message instead of the file's contents."
#echo "# To view the contents, try to put './' ahead of the filename when"
#echo "# calling less."
else
echo "Usage: eval \`$BASENAME\`"
exit
fi