1 files changed, 37 insertions, 0 deletions
diff --git a/cmd/util.ha b/cmd/util.ha
new file mode 100644
index 0000000..832a96f
--- /dev/null
+++ b/cmd/util.ha
@@ -0,0 +1,37 @@
+use fmt;
+use fs;
+use io;
+use os;
+
+use gpt;
+
+export fn mkvol(vol: str) io::file = {
+	return match (os::create(vol, fs::mode::USER_RWX | fs::mode::GROUP_RX | fs::mode::OTHER_RX, fs::flags::RDWR)) {
+	case let v: io::file =>
+		yield v;
+	case =>
+		fmt::fatalf("{}: cannot open file {}", os::args[0], vol);
+	};
+};
+
+export fn openvol(vol: str) io::file = {
+	return match (os::open(vol, fs::flags::RDWR)) {
+	case let v: io::file =>
+		yield v;
+	case =>
+		fmt::fatalf("{}: cannot open file {}", os::args[0], vol);
+	};
+};
+
+export fn opengpt(vol: str) *gpt::gpt = {
+	const vol = openvol(vol);
+	
+	return match (gpt::from(vol)) {
+	case let g: *gpt::gpt =>
+		yield g;
+	case io::error =>
+		fmt::fatalf("{}: could not properly read disk {}", os::args[0], os::args[1]);
+	case =>
+		fmt::fatalf("{}: no valid gpt in disk", os::args[0]);
+	};
+};