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227 lines
6.9 KiB
Perl
Executable File
227 lines
6.9 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#
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# Perl script to make a bootable image from a floppyfw floppy
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# The basic idea is to unpack and replace or convert all
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# the necessary config files into the initrd
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# and then make a bootable image out of it
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#
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# The --format= option overrides the default of nbi or elf hardcoded
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# in the source. Valid arguments are nbi or elf.
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#
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# The --output= options specifies an output file instead of stdout
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# The --nonet option specifies that a netbootable image is not to
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# be built but the vmlinuz and initrd.gz files left behind in $tempdir
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# The --localtime=f option specifies a timezone file that's to be
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# copied to /etc/localtime in the initrd, allowing a different timezone.
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# The --ffw29 option is intended for 2.9.x and above and extends
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# the size of the initrd by making a bigger one and copying the original over.
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#
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# The first non-option argument is taken to be the letter of a floppy to
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# convert, e.g. a:, b: or even x: where x: is mapped to a file using
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# mtools mapping in $HOME/.mtoolsrc. See the mtools documentation.
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# Thus you can work on a floppy image in a disk file and only write
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# to a floppy with dd or cp when you need to test the image.
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use Getopt::Long;
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use lib '/usr/local/lib/mkffwnb/';
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use Extendinitrd;
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use strict;
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use vars qw($testing $verbose $localtime $nonet $format $ffw29 $imagefile
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$floppy $libdir $tftpdir $output $tempdir $tempmount);
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sub findversion () {
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my ($version) = grep(/FloppyFW/, `mtype $imagefile ${floppy}floppyfw.msg`);
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return '' unless defined($version) and $version ne '';
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chomp($version);
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$version =~ s/.*FloppyFW (\d+\.\d+\.\d+(\.\d+)?).*/$1/;
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return ($version);
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}
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sub getappendargs () {
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my ($append) = join(' ', grep(/^\s*(append\s|console=)/, `mtype $imagefile ${floppy}syslinux.cfg`));
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chomp ($append);
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my @args = split(/\s+/, $append);
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my @result = ();
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foreach $_ (@args) {
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next if (/^$/ or /^append/ or /^initrd=/);
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next if (!$ffw29 and /^root=/);
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push (@result, $_);
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}
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return (join(' ', @result));
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}
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# Copy whole floppy to the current directory
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# m preserves timestamps, n overwrites without warning and / means recursive
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sub mcopy ($) {
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my ($tempdir) = @_;
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print "mcopy $imagefile -mn/ ${floppy}* $tempdir\n";
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my $status = system("mcopy -mn/ $imagefile ${floppy}* $tempdir");
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return ($status / 256);
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}
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# Gunzip file, -f forces overwriting of uncompressed file
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sub gunzip ($) {
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my ($file) = @_;
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print "Gunzipping $file\n" if ($verbose);
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my $status = system('gunzip', '-f', $file);
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return ($status / 256);
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}
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# Gzip file, -f forces overwriting of compressed file
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sub gzip ($) {
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my ($file) = @_;
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print "Gzipping $file\n" if ($verbose);
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my $status = system('gzip', '-9', '-f', $file);
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return ($status / 256);
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}
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sub loopbackmount ($$) {
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my ($file, $point) = @_;
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print "Mounting $file on $point loopback\n" if ($verbose);
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my $status = system('mount', '-o', 'loop', $file, $point);
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return ($testing ? 0 : $status / 256);
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}
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sub loopbackumount ($) {
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my ($point) = @_;
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print "Umounting $point\n" if ($verbose);
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my $status = system('umount', $point);
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return ($testing ? 0 : $status / 256);
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}
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# Convert DOS CR-NL to Unix NL. $dst has implied prefix of $tempmount
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# Use @output for temporary storage in case we write back to the same file
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sub dostounix ($$) {
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my ($src, $dst) = @_;
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my @output = ();
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$dst = "$tempmount/$dst";
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print "Converting $src to $dst\n" if ($verbose);
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unless (open(S, $src)) {
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print "$src: $!\n";
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return (0);
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}
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while (<S>) {
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chomp;
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tr /\015//d;
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push(@output, $_);
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}
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close(S);
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open(D, ">$dst") or return;
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for $_ (@output) {
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print D "$_\n";
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}
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close(D);
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chmod(0755, $dst);
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return (1);
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}
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sub bunzip2untar ($$) {
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my ($file, $dir) = @_;
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print "Unpacking $file into $dir\n" if ($verbose);
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system("bunzip2 < $file | (cd $dir; tar xf -)");
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}
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$testing = $< != 0;
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$verbose = 1;
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$format = '';
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$imagefile = '';
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GetOptions('output=s' => \$output,
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'nonet!' => \$nonet,
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'localtime=s' => \$localtime,
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'format=s' => \$format,
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'ffw29!' => \$ffw29,
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'ffw30!' => \$ffw29,
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'i=s' => \$imagefile);
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if (defined($output) and $output !~ m(^/)) {
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my $d = `pwd`;
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chomp($d);
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$output = "$d/$output";
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}
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if ($imagefile) {
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$imagefile = "-i $imagefile";
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}
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$libdir = '/usr/local/lib/mkffwnb';
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$tftpdir = '/usr/local/var/tftpboot';
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# default can also be 'elf'
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$format = 'nbi' if ($format ne 'elf' and $format ne 'nbi');
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$floppy = $#ARGV >= 0 ? $ARGV[0] : 'a:';
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print <<EOF;
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This program requires mtools, tar, bzip2, loopback mount in the kernel,
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and root privileges to execute. Hope you have them.
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EOF
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my $version = &findversion();
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$version ne '' or die "Cannot determine version\n";
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print "Version $version\n";
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my $append = &getappendargs();
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$append = "--append='$append'" if $append ne '';
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print "$append\n";
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$libdir .= '/' . $version;
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-d $libdir or die "Cannot find files for $version\n";
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$tempdir = $nonet ? '/tmp/mkffwnb' : "/tmp/mkffwnb$$";
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$tempmount = 'tmpmount';
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mkdir($tempdir, 0755);
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print "Copying files off floppy, please be patient...\n";
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&mcopy($tempdir) == 0 or die "Mcopy failed, diskette problem?\n";
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chdir($tempdir);
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&gunzip('initrd.gz') == 0 or die "Gunzip of initrd.gz failed\n";
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if ($ffw29) {
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extendinitrd("initrd", 5760);
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system("mv newinitrd initrd");
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}
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mkdir($tempmount, 0755);
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&loopbackmount('initrd', $tempmount) == 0 or die "Loopback mount failed\n";
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&dostounix("$libdir/linuxrc", "linuxrc") if (-r "$libdir/linuxrc");
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unless (&dostounix("$libdir/floppyfw.ini", "floppyfw.ini")) {
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&dostounix("floppyfw/floppyfw.ini", $ffw29 ? "etc/floppyfw.ini" : "floppyfw.ini");
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}
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&dostounix("config", $ffw29 ? "etc/config.prelogin" : "etc/config");
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for my $i (glob('*.bz2 floppyfw/add.bz2 modules/*.bz2 packages/*.bz2')) {
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&bunzip2untar($i, $tempmount);
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}
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for my $i (glob('packages/*.ini')) {
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my $file = $i;
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$file =~ s:packages/::;
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&dostounix($i, "etc/$file");
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}
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&dostounix("hosts", "etc/hosts");
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&dostounix("modules.lst", "etc/modules.lst");
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&dostounix("network.ini", "etc/network.init");
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&dostounix("firewall.ini", "etc/firewall.init");
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&dostounix("syslog.cfg", "etc/syslog.conf");
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&dostounix("packages/timeinfo", "etc/localtime");
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system("cp -p licenses/* $tempmount/licenses/");
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# This conditional code is for 1.1.2 and below
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unless (glob('modules/*.bz2')) {
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print "Copying additional modules\n" if ($verbose);
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system("cp -p modules/* $tempmount/lib/modules/");
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}
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# If a timezone file has been specified, copy that onto initrd
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if (defined($localtime)) {
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if (-r $localtime) {
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print "Copying $localtime to $tempmount/etc/localtime\n";
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system("cp -p $localtime $tempmount/etc/localtime");
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} else {
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print "$localtime: $!\n";
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}
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}
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&loopbackumount($tempmount) == 0 or die "Loopback umount failed\n";
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&gzip('initrd') == 0 or die "Gzip of initrd failed\n";
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if ($nonet) {
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print "Floppyfw directory in $tempdir\n";
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} else {
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print "Calling mk$format-linux to make the netbootable image\n" if ($verbose);
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$output = "$tftpdir/floppyfw-$version.nb" if (!defined($output));
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system("mk$format-linux $append --output=$output vmlinuz initrd.gz");
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system("rm -fr $tempdir");
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}
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