RetroZilla/config/build-list.pl
2015-10-20 23:03:22 -04:00

115 lines
3.0 KiB
Perl

#!env perl
#
# ***** BEGIN LICENSE BLOCK *****
# 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
# http://www.mozilla.org/MPL/
#
# 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 mozilla.org 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 <cls@seawood.org>
#
# 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";
exit(1);
}
$nofilelocks = 0;
getopts("l");
$nofilelocks = 1 if defined($::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: $!\n");
binmode(IN);
while ($tmp = <IN>) {
chomp($tmp);
push @inbuf, $tmp;
}
close(IN);
}
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");
binmode(OUT);
foreach $entry (@outbuf) {
print OUT "$entry\n";
}
close(OUT);
}
mozUnlock($lockfile) unless $nofilelocks;
exit(0);