File sysconf_addword of Package apache2.21779
#!/bin/bash
# Copyright 2005 Peter Poeml <apache@suse.de>. All Rights Reserved.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
debug=false
function usage() {
cat <<-EOF
usage: $(basename $0) [-r] FILE VAR WORD
Add word WORD to variable VAR in file FILE, or remove
it if the -r option is given.
Example:
$(basename $0) /etc/sysconfig/apache2 APACHE_SERVER_FLAGS asdf
leads to the change:
-APACHE_SERVER_FLAGS="SSL STATUS ruby"
+APACHE_SERVER_FLAGS="SSL STATUS ruby asdf"
If multiple lines matching ^VAR= are found (which happens to be a habit of
mine), only the last one is manipulated.
It does not work for WORD starting with characters like a dash which
prevent word boundary matching.
EOF
}
function find_last_occurrence () {
# takes two arguments, FILE and VAR
# and return the number of the last line where
# VAR occurs in FILE (not commented)
grep -n -- "^[[:space:]]*$1" $2 | tail -n 1 | cut -d: -f1
}
function word_present () {
. $file
case " ${!var} " in
*" $word "*) true;;
*) false;;
esac
}
function add_word() {
local word=$1
local word_quoted=$2
if ! word_present; then
$debug && cp $file $tmpf
sed -i -e "${lineno} {
s/^[[:space:]]*\($var=\".*\)\(\".*\)/\1 $word_quoted\2/;
s/=\" /=\"/
}" $file
$debug && diff -u $tmpf $file
else
echo \"$word\" already present
fi
# some balancing for vim"s syntax highlighting
}
function remove_word() {
local word=$1
local word_quoted=$2
if word_present; then
$debug && cp $file $tmpf
sed -i -e "${lineno} {
s/\(['\" ]\)$word_quoted\(['\" ]\)/\1 \2/g
s/ / /g
}" $file
$debug && diff -u $tmpf $file
else
echo \"$word\" not present
fi
# some balancing for vim"s syntax highlighting
}
# poor man's option parsing
case "$1" in
-h) usage; exit 0;;
esac
if [ $# -lt 3 ]; then
echo not enough arguments
echo
usage; exit 1
fi
action=add
case "$1" in
-r) action=remove; shift;;
esac
file=$1; shift
var=$1; shift
word=$1
word_quoted=${1//\//\\\/}
if $debug; then
echo FILE: $file
echo VAR: $var
echo WORD: $word
echo current content:
grep "^$var=" $file | tail -n 1
echo
fi
if ! [ -r $file ]; then
echo ${0##*/}: file $file is not a readable file
exit 1
fi
lineno=$(find_last_occurrence $var $file)
if [ -z $lineno ]; then
echo ${0##*/}: variable $var does not occur in $file
exit 1
fi
$debug && tmpf=$(mktemp /tmp/$(basename $0).XXXXXX)
if [ $action = add ]; then
add_word $word $word_quoted $lineno
else
remove_word $word $word_quoted $lineno
fi
$debug && rm -f $tmpf
exit 0