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package Util::FileMod;
# $Id: FileMod.pm,v 1.4 2003/01/19 23:26:21 sdague Exp $
# Copyright (c) 2001 International Business Machines
# 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.
# 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.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# Sean Dague <sean@dague.net>
use strict;
use Carp;
use vars qw($VERSION);
$VERSION = sprintf("%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/);
=head1 NAME
Util::FileMod - A flexible interface for modifying simple flat text config files.
=head1 SYNOPSIS
# for space seperated, unquoted key/value files, like modules.conf
my $rc = new Util::FileMod(Seperator => ' ', Quotes => '', Comment => '#');
$rc->add_vars(
"alias eth0" => "eepro100",
"alias eth1" => "pcnet32",
"alias tr0" => "olympic",
);
$rc->update_file("/mnt/etc/modules.conf");
# for '=' seperated, double quoted key/value files, like the suse rc.config file
# and most rc files
my $rc = new Util::FileMod(Seperator => '=', Quotes => '"', Comment => '#');
$rc->add_vars(
IPADDR_0 => "192.168.64.101",
NETDEV_0 => "eth0",
IFCONFIG_0 => "192.168.64.101 broadcast 192.168.64.255 netmask 255.255.255.0",
NETCONFIG => "_0",
);
$rc->update_file("/mnt/etc/rc.config");
# Note: Defaults to Seperator => '=', Quotes => '"', Comment => '#'
=cut
sub new {
my $class = shift;
my $this = {
Seperator => '=',
Quotes => '"',
Comment => '#',
@_,
filesmod => [],
};
bless $this, $class;
}
sub files {
my $this = shift;
return @{$this->{filesmod}};
}
sub append_vars {
my $this = shift;
my %vars = @_;
foreach my $key (keys %vars) {
$this->{VARS}->{$key}->{VALUE} .= $vars{$key};
}
return 1;
}
sub add_vars {
my $this = shift;
my %vars = @_;
foreach my $key (keys %vars) {
$this->{VARS}->{$key}->{VALUE} = $vars{$key};
}
return 1;
}
sub update_file {
my $this = shift;
my $file = shift;
if(-e $file) {
system("cp $file $file.scbak") and croak("Couldn't backup $file to $file.scbak");
open(IN,"<$file.scbak") or croak("Could not open $file.luibak for reading");
open(OUT,">$file") or croak("Could not open $file for writing");
while(<IN>) {
my $line = $this->new_line($_);
print OUT $line;
}
close(IN);
} else {
open(OUT,">$file") or croak("Could not open $file for writing");
}
if (my $extra = $this->extra_lines()) {
print OUT $extra;
}
close(OUT);
push @{$this->{filesmod}},$file,"$file.scbak";
return 1;
}
sub extra_lines {
my $this = shift;
my $lines;
my $quotes=$this->{Quotes};
my $sep = $this->{Seperator};
my $rem = $this->{Comment}; #hehe, "rem" brings back memories!
foreach my $key (sort keys %{$this->{VARS}}) {
if (!$this->{VARS}->{$key}->{DONE}) {
my $value = $this->{VARS}->{$key}->{VALUE};
$lines .= "$key$sep$quotes$value$quotes\n";
$this->{VARS}->{$key}->{DONE} = 1;
}
}
if (defined $lines) {
$lines = "$rem BEGIN: Lines added by System Configurator\n" . $lines;
$lines .= "$rem END: Lines added by System Configurator\n";
}
return $lines;
}
sub new_line {
my $this = shift;
my $line = shift;
my $quotes=$this->{Quotes};
my $sep = $this->{Seperator};
my $rem = $this->{Comment}; #hehe, "rem" brings back memories!
foreach my $key (sort keys %{$this->{VARS}}) {
my $value = $this->{VARS}->{$key}->{VALUE};
$value =~ s/\s+$//;
my $message = "$rem This line commented out by System Configurator\n";
my $newline = "$key$sep$quotes$value$quotes\n";
if($line =~ /^($key($sep)+.*)/) {
my $oldine = " " . $1 . "\n";
if($1 eq $newline) {
$this->{VARS}->{$key}->{DONE} = 1;
return $line;
} else {
$this->{VARS}->{$key}->{DONE} = 1;
$line = $message . $rem . $oldine . $newline;
return $line;
}
}
}
return $line;
}
1;
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