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|
#! /usr/bin/perl
# **** 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.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2010 Vyatta, Inc.
# All Rights Reserved.
#
# **** End License ****
# Update console configuration in /etc/inittab and grub
# based on Vyatta configuration
use strict;
use warnings;
use lib "/opt/vyatta/share/perl5";
use Vyatta::Config;
use File::Compare;
use File::Copy;
use experimental 'smartmatch';
die "$0 expects no arguments\n" if (@ARGV);
# if file is unchanged, do nothing and return false
# otherwise update to new version
sub update {
my ($old, $new) = @_;
if (compare($old, $new) != 0) {
move($new, $old)
or die "Can't move $new to $old";
return 1;
} else {
unlink($new);
return;
}
}
sub update_getty{
my $directory = "/etc/systemd/system";
my $config = new Vyatta::Config;
$config->setLevel("system console device");
my @ttys;
foreach my $tty ($config->listNodes()) {
push(@ttys, "serial-getty\@$tty.service");
}
opendir DIR, $directory or die "Couldn't open dir '$directory': $!";
while (my $file = readdir(DIR)) {
next unless ($file =~ /^serial-getty/);
if ( not $file ~~ @ttys ) {
system("systemctl stop $file");
if (-e "$directory/getty.target.wants/$file") {
unlink "$directory/getty.target.wants/$file"
or die "Failed to remove file $file: $!\n";
}
if (-e "$directory/$file") {
unlink "$directory/$file"
or die "Failed to remove file $file: $!\n";
}
system("systemctl daemon-reload");
}
}
closedir DIR;
foreach my $tty ($config->listNodes()) {
my $SGETTY = "/lib/systemd/system/serial-getty\@.service";
my $TMPGETTY = "/etc/systemd/system/serial-getty\@$tty.service";
my $SYMGETTY = "/etc/systemd/system/getty.target.wants/serial-getty\@$tty.service";
open(my $sgetty, '<', $SGETTY)
or die "Can't open $SGETTY: $!";
open(my $tmp, '>', $TMPGETTY)
or die "Can't open $TMPGETTY: $!";
my $speed = $config->returnValue("$tty speed");
if ($tty =~ /^hvc\d/) {
$speed = 38400 unless $speed;
} else {
$speed = 9600 unless $speed;
}
while (<$sgetty>) {
if (/^ExecStart=/) {
$_ =~ s/115200,38400,9600/$speed/g;
}
print {$tmp} $_;
}
close $sgetty;
close $tmp;
symlink("$TMPGETTY","$SYMGETTY");
system("systemctl daemon-reload");
if ( system("systemctl status serial-getty\@$tty.service 2>&1 > /dev/null")) {
system("systemctl start serial-getty\@$tty.service");
} else {
system("systemctl restart serial-getty\@$tty.service");
}
}
}
my $GRUBCFG = "/boot/grub/grub.cfg";
my $GRUBTMP = "/tmp/grub.cfg.$$";
# For existing serial line change speed (if necessary)
# Only applys to ttyS0
sub update_grub {
return unless (-f $GRUBCFG);
my $config = new Vyatta::Config;
$config->setLevel("system console device");
return unless $config->exists("ttyS0");
my $speed = $config->returnValue("ttyS0 speed");
$speed = "9600" unless defined($speed);
open(my $grub, '<', $GRUBCFG)
or die "Can't open $GRUBCFG: $!";
open(my $tmp, '>', $GRUBTMP)
or die "Can't open $GRUBTMP: $!";
while (<$grub>) {
if (/^serial /) {
print {$tmp} "serial --unit=0 --speed=$speed\n";
} elsif (/^(.* console=ttyS0),[0-9]+(.*)$/) {
print {$tmp} "$1,$speed$2\n";
} else {
print {$tmp} $_;
}
}
close $grub;
close $tmp;
update($GRUBCFG, $GRUBTMP);
}
update_getty;
update_grub;
exit 0;
|
