Tue, 29 Jan 2008 10:38:15 -0800
changeset 10924 c240b3f25bb784ee39ab1baf99e7fcd12077be68
parent 1 9b2a99adc05e53cd4010de512f50118594756650
permissions -rwxr-xr-x
Bug 66057 - "Proxy: $http_proxy should influence proxy settings" [ (Robert O'Callahan [roc]) / (Diane Trout) / (Michael Ventnor) r=josh r+sr=biesi a1.9=damons]

#!env perl

# Version: MPL 1.1/GPL 2.0/LGPL 2.1
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
# The Original Code is code.
# The Initial Developer of the Original Code is
# Netscape Communications Corporation.
# Portions created by the Initial Developer are Copyright (C) 2001
# the Initial Developer. All Rights Reserved.
# Contributor(s):
#   Christopher Seawood <>
# Alternatively, the contents of this file may be used under the terms of
# either of the GNU General Public License Version 2 or later (the "GPL"),
# or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
# ***** END LICENSE BLOCK *****

# A generic script to add entries to a file 
# if the entry does not already exist
# Usage: $0 [-l] <filename> <entry> [<entry> <entry>]
#   -l do not attempt flock the file.

use Fcntl qw(:DEFAULT :flock);
use Getopt::Std;
use mozLock;

sub usage() {
    print "$0 [-l] <filename> <entry>\n";

$nofilelocks = 0;


$nofilelocks = 1 if defined($::opt_l);

$file = shift;

undef @entrylist;
while (defined($entry = shift)) {
    push @entrylist, $entry;

$lockfile = $file . ".lck";

# touch the file if it doesn't exist
if ( ! -e "$file") {
    $now = time;
    utime $now, $now, $file;

# This needs to be atomic
mozLock($lockfile) unless $nofilelocks;

# Read entire file into mem
undef @inbuf;
if ( -e "$file" ) {
    open(IN, "$file") || die ("$file: $!\n");
    while ($tmp = <IN>) {
	push @inbuf, $tmp;

undef @outbuf;
# Add each entry to file if it's not already there
foreach $entry (@entrylist) {
    push @outbuf, $entry if (!grep(/^$entry$/, @inbuf));

$count = $#outbuf + 1;

# Append new entry to file
if ($count) {
    open(OUT, ">>$file") || die ("$file: $!\n");
    foreach $entry (@outbuf) {
	print OUT "$entry\n";

mozUnlock($lockfile) unless $nofilelocks;