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|
#!/usr/bin/perl
#
# Module: vyatta-watchlink-exclude.pl
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
# You can also obtain it by writing to the Free Software Foundation,
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Stig Thormodsrud
# Date: March 2008
# Description: Script to update watchlink exclude file
#
# **** End License ****
#
#
# parameters:
# --id="" : owner of exclude line (e.g. vrrp, ha) [required]
# --action="" : add or remove [required]
# --intf="" : interface [required for add]
# --ipaddr="" : ip address or network to execlude [optional]
# --signal : should watchlink get signaled [optional]
#
# Expected format of exclude file:
#
# <interface> [ <ipv4addr> | <ipv4net> ] # id
#
use Getopt::Long;
use POSIX;
use strict;
use warnings;
my $exclude_file = '/var/linkstatus/exclude';
my $watchlink_pid = '/var/run/vyatta/quagga/watchlink.pid';
sub read_exclude_file {
my $FILE;
my @lines = ();
if (! -e $exclude_file) {
return @lines;
}
open($FILE, "<", $exclude_file) or die "Error: read() $!";
@lines = <$FILE>;
close($FILE);
chomp @lines;
return @lines;
}
sub write_exclude_file {
my @lines = @_;
my $FILE;
open($FILE, ">", $exclude_file) or die "Error: write() $!";
if (scalar(@lines) > 0) {
print $FILE join("\n", @lines), "\n";
}
close($FILE);
}
sub remove_exclude_id {
my ($id, @lines) = @_;
my @new_lines;
my $match = 0;
foreach my $line (@lines) {
if ($line =~ /# $id$/) {
$match++;
} else {
push @new_lines, $line;
}
}
if ($match < 1) {
die "Error: no match found for $id";
}
return @new_lines;
}
sub remove_exclude_line {
my ($remove_line, @lines) = @_;
my @new_lines;
my $match = 0;
foreach my $line (@lines) {
if ($line eq $remove_line) {
$match++;
} else {
push @new_lines, $line;
}
}
if ($match < 1) {
die "Error: no match found for $remove_line";
}
return @new_lines;
}
sub is_exclude_dup {
my ($new_line, @lines) = @_;
my $frag = substr($new_line, 0, index($new_line, ' #'));
foreach my $line (@lines) {
if (substr($line, 0, index($line, ' #')) eq $frag) {
return 1;
}
}
return 0;
}
#
# main
#
my ($opt_id, $opt_action, $opt_intf, $opt_ipaddr, $opt_ipnet, $opt_signal);
GetOptions("id=s" => \$opt_id,
"action=s" => \$opt_action,
"intf=s" => \$opt_intf,
"ipaddr=s" => \$opt_ipaddr,
"signal!" => \$opt_signal,
);
if (!(defined $opt_id and defined $opt_action)) {
die "Error: parameters --id --action must be set";
}
if ($opt_action ne "add" and $opt_action ne "remove") {
die "Error: --action must be \"add\" or \"remove\" ";
}
if ($opt_action eq "add" and !defined($opt_intf)) {
die "Error: --intf must be set for \"add\"";
}
my @lines = read_exclude_file();
my $new_line = "$opt_intf ";
if (defined $opt_ipaddr) {
$new_line .= "$opt_ipaddr ";
}
if (defined $opt_id) {
$new_line .= "# $opt_id";
}
if ($opt_action eq "add") {
if (! is_exclude_dup($new_line, @lines)) {
push @lines, $new_line;
}
} elsif (defined $opt_intf) {
@lines = remove_exclude_line($new_line, @lines);
} else {
@lines = remove_exclude_id($opt_id, @lines);
}
write_exclude_file(@lines);
if (defined $opt_signal) {
if (! -e $watchlink_pid) {
die "Error: missing pid file [$watchlink_pid]\n";
}
my $pid = `cat $watchlink_pid`;
chomp $pid;
system("kill -10 $pid");
}
# end of file
|
