Initial revision

1 files changed, 43 insertions, 0 deletions

diff --git a/contrib/mkffwnb/Extendinitrd.pm b/contrib/mkffwnb/Extendinitrd.pm
new file mode 100644
index 000000000..3b919ad13
--- /dev/null
+++ b/contrib/mkffwnb/Extendinitrd.pm
@@ -0,0 +1,43 @@
+#!/usr/bin/perl -w
+
+sub status_system ($$) {
+	my ($command, $message) = @_;
+
+	$status = system($command);
+	$status <<= 8;
+	if ($status < 0) {
+		print STDERR "$!\n";
+	}
+	if ($status != 0) {
+		print STDERR "$message\n";
+	}
+}
+
+sub extendinitrd ($$) {
+	my ($initrd, $nblocks) = @_;
+
+	if ($nblocks <= 1440) {
+		print STDERR "nblocks must be >= 1440\n";
+		return (1);
+	}
+	(undef, $type, undef, $fnlen, undef)  = split(' ', `file $initrd`, 5);
+	print "$type $fnlen\n";
+	if ($type ne 'Minix' || $fnlen != 30) {
+		die "Can only handle Minix initrds with 30 char filenames\n";
+		return (1);
+	}
+	status_system("dd if=/dev/zero of=newinitrd bs=1k count=$nblocks", "Cannot create new initrd\n");
+	status_system("mkfs.minix -n 30 newinitrd $nblocks", "Cannot mkfs.minix new initrd\n");
+	mkdir("initrd.from") || print STDERR "Cannot make temp mount point initrd.from\n";
+	mkdir("initrd.to") || print STDERR "Cannot make temp mount point initrd.to\n";
+	status_system("mount -o ro,loop $initrd initrd.from", "Cannot mount $initrd on initrd.from");
+	status_system("mount -o loop newinitrd initrd.to", "Cannot mount newinitrd on initrd.to");
+	status_system("cp -a initrd.from/* initrd.to/", "Cannot copy initrd to newinitrd");
+	status_system("umount initrd.from", "Cannot umount initrd.from");
+	status_system("umount initrd.to", "Cannot umount initrd.to");
+	rmdir("initrd.from") || print STDERR "Cannot remove temp mount point initrd.from\n";
+	rmdir("initrd.to") || print STDERR "Cannot remove temp mount point initrd.to\n";
+	return (0);
+}
+
+1;