#! /usr/bin/perl
#
# saveconfig
#
# Print out the configuration of the current /etc/rc?.d
# symlink setup, in a format compatible to the
# "update-rc.d" command line.
#
# Author: Miquel van Smoorenburg <[email protected]>
# Adjusted by Petter Reinholdtsen
#

sub usage {
print STDERR "error: ", @_, "\n" if @_;
print STDERR <<EOF;
saveconfig [-h] [-s <archivedir>]
-s save each scripts setting in directory <archivedir>
-h show usage inforation
EOF
}

my $archivedir = "";

while($#ARGV >= 0 && ($_ = $ARGV[0]) =~ /^-/) {
shift @ARGV;
if (/^-s$/) { $archivedir = shift; usage("Missing -s argument"), exit 1 unless $archivedir; next }
if (/^-h|--help$/) { &usage; }
&usage("unknown option");
}

chdir "/etc/init.d";

sub scan {
my $dir = shift;
local *DD;
my $f;
opendir DD, $dir;
foreach $f (readdir DD) {
next if ($f =~ m/^\./);
push @{$dir{$dir}}, $f;
}
closedir DD;
}

foreach my $d (qw(S 0 1 2 3 4 5 6 7 8 9)) {
scan("/etc/rc$d.d");
}
scan("/etc/init.d");

foreach my $s (@{$dir{"/etc/init.d"}}) {
my %start;
my %stop;
my $start = 0;
my $stop = 0;
foreach my $l (qw(S 0 1 2 3 4 5 6)) {
#print "L: $l\n";
foreach my $f (@{$dir{"/etc/rc$l.d"}}) {
#print "F: $f\n";
if ($f =~ m#^S(\d+)$s$#) {
$start{$1} .= "$l ";
$start = 1;
}
if ($f =~ m#^K(\d+)$s$#) {
$stop{$1} .= "$l ";
$stop = 1;
}
}
}
my $entry;
if ($start || $stop) {
$entry = "update-rc.d $s ";
if ($start > 0) {
foreach my $x (sort keys %start) {
$entry .= "start $x " . $start{$x} . ". ";
}
}
if ($stop > 0) {
foreach my $x (sort keys %stop) {
$entry .= "stop $x " . $stop{$x} . ". ";
}
}
$entry .= "\n";
if ($archivedir) {
my $file = "$archivedir/$s";
open(FILE, ">", "${file}.new") ||
die "Unable to write to $file";
print FILE $entry;
close(FILE);
rename "${file}.new", "$file";
} else {
print $entry;
}
}
}