srctree

Gregory Mullen parent 4fde1470 2f957070
check before write

src/main.zig added: 7, removed: 3, total 4

@@ -33,9 +33,13 @@ fn exportPin(comptime pin: u16) !void {

return err;

};

defer direction_dir.close();

var direction_file = try direction_dir.openFile(DIRECTION, .{ .mode = .write_only });

var direction_file = try direction_dir.openFile(DIRECTION, .{ .mode = .read_write });

defer direction_file.close();

try direction_file.writeAll("out");

var buf: [4]u8 = undefined;

const c = try direction_file.read(&buf);

if (c >= 3 and !std.mem.eql(u8, buf[0..3], "out")) {

try direction_file.writeAll("out");

}

const PinLevel = enum {