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less
lessopen.sh
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File lessopen.sh of Package less
#!/bin/bash # # Copyright (c) 2001 SUSE GmbH, Nuernberg, Germany # Copyright (c) 2002 SUSE Linux AG, Nuernberg, Germany # # Author: Vladimir Linek <vinil@suse.cz> # Support for directory listing by Dimitar Pashov <d.pashov@gmail.com> # # Preprocessor for 'less'. # Use with environment variable: LESSOPEN="lessopen.sh %s" # the following hack does not break anything but helps to view file whose name # begins with a "-" or "+" with names if echo "$1" | grep -q ^/; then # absolute path SRC="$1" else # relative path SRC="./$1" fi NAME="${SRC##*/}" [ ! -r "$SRC" ] && exit 1 cleaner() { test "$TMPF_pre" = "$SRC" -o "$TMPF_pre" = "$TMPF" && return rm -f "$TMPF_pre" } trap 'cleaner' EXIT SIGHUP TMPF=$(mktemp /tmp/less.XXXXXXXXX) || exit 1 TMPF_pre=$(mktemp /tmp/less.XXXXXXXXX) || exit 1 lang=$LANG test -n "$LC_CTYPE" && lang="$LC_CTYPE" case "$lang" in *.UTF-8|*.UTF8) GROFF_DEVICE=utf8 ;; ja*) GROFF_DEVICE=nippon ;; *) GROFF_DEVICE=latin1 ;; esac CMD= type=`/usr/bin/file -L "$SRC"` case ${type#"$SRC": } in *"gzip compressed data"*|\ *"compress'd data"*|\ *"packed data"*) CMD="gzip -dc" ;; *"Zip archive data"*) CMD="unzip -v" ;; *"bzip"*" compressed data"*) CMD="bzip2 -dc" ;; *"xz compressed data"*|\ *"XZ compressed data"*) CMD="xz -dc" ;; *"Zstandard compressed data"*) CMD="zstd -dc" ;; *) rm -f "$TMPF_pre" TMPF_pre="$SRC" ;; esac test -n "$CMD" && $CMD "$SRC" >"$TMPF_pre" 2>/dev/null type=`/usr/bin/file -L "$TMPF_pre"` case ${type#"$TMPF_pre": } in *tar\ archive*) if [ -x "`/usr/bin/which tar 2>/dev/null`" ]; then tar tvvf "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "tar is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *Microsoft\ Cabinet\ *\ data*) if [ -x "`/usr/bin/which cabextract 2>/dev/null`" ]; then cabextract -l "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "cabextract is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *RPM*) if [ -x "`/usr/bin/which rpm 2>/dev/null`" ]; then (echo -e "=============================== Information ====================================\n"; rpm -qip "\"$TMPF_pre\""; echo -e "\n\n================================= Changelog (head) =============================\n"; rpm -qp --changelog "\"$TMPF_pre\"" | head -n 16 echo -e "\n\n================================= Content ======================================\n"; rpm -qlp "\"$TMPF_pre\"" ) >"$TMPF" 2>/dev/null else echo "rpm is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *DVI*) if [ -x "`/usr/bin/which dvi2tty 2>/dev/null`" ]; then if [ "${TMPF_pre%.dvi}" != "$TMPF_pre" ] ; then dvi2tty -q "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "dvi2tty requires an input file name with the suffix .dvi" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre" ; fi else echo "dvi2tty is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *PDF*) if [ -x "`/usr/bin/which pdftotext 2>/dev/null`" ]; then pdftotext "$TMPF_pre" "$TMPF" 2>/dev/null else echo "pdftotext is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *Debian\ binary\ package*) if [ -x "`/usr/bin/which dpkg-deb 2>/dev/null`" ]; then dpkg-deb -c "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "dpkg-deb is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *\ ar\ archive*) if [ -x "`/usr/bin/which nm 2>/dev/null`" ]; then nm "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "nm is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *directory*) # assuming ls is always available ls -lh "$TMPF_pre" >"$TMPF" 2>/dev/null ;; *diff\ output*) # I haven't found way, to set less -R from this script # so check, if '-R' or '--RAW-CONTROL-CHARS' is set in environment R_NOT_SET=true for i in $LESS; do if [ "${i:0:1}" = "-" ]; then if [ "${i:1:1}" = "-" ]; then if [ "$i" = --RAW-CONTROL-CHARS ]; then R_NOT_SET=false break else continue fi else for j in `seq 1 $((${#i} - 1 ))`; do if [ "${i:j:1}" = R ]; then R_NOT_SET=false break fi done fi fi done # if we have -R and colordiff, we can continue if [ $R_NOT_SET = false ] && \ [ -x "`/usr/bin/which colordiff 2>/dev/null`" ]; then colordiff < "$TMPF_pre" | cat > "$TMPF" 2>/dev/null else rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *) if [ "$LESS_ADVANCED_PREPROCESSOR" = "yes" ]; then case ${type#"$TMPF_pre": } in *troff*) if [ -x "`/usr/bin/which groff 2>/dev/null`" ]; then case "$NAME" in *.[1-9nxp]*|*.man|*.[1-9nxp]*.*|*.man.*) groff -s -p -t -e -T$GROFF_DEVICE -mandoc "$TMPF_pre" >"$TMPF" 2>/dev/null ;; *.ms|*.ms.*) groff -T$GROFF_DEVICE -ms "$TMPF_pre" >"$TMPF" 2>/dev/null ;; *.me|*.me.*) groff -T$GROFF_DEVICE -me "$TMPF_pre" >"$TMPF" 2>/dev/null ;; *) groff -T$GROFF_DEVICE "$TMPF_pre" >"$TMPF" 2>/dev/null ;; esac else echo "groff is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *PostScript*) if [ -x "`/usr/bin/which ps2ascii 2>/dev/null`" ]; then ps2ascii "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "ps2ascii is not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *HTML*) if [ -x "`/usr/bin/which w3m 2>/dev/null`" ]; then w3m -dump -T text/html "$TMPF_pre" >"$TMPF" 2>/dev/null elif [ -x "`/usr/bin/which lynx 2>/dev/null`" ]; then lynx -dump -force_html "$TMPF_pre" >"$TMPF" 2>/dev/null else echo "lynx/w3m not available for preprocessing" 1>&2; rm -f "$TMPF"; TMPF="$TMPF_pre"; fi ;; *) rm -f "$TMPF" TMPF="$TMPF_pre" ;; esac else rm -f "$TMPF" TMPF="$TMPF_pre" fi ;; esac test "$TMPF" = "$SRC" || echo "$TMPF"
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