fn closeWasi(fd: std.c.fd_t) callconv(.c) c_int
fn closeWasi(fd: std.c.fd_t) callconv(.c) c_int { switch (std.os.wasi.fd_close(fd)) { .SUCCESS => return 0, else => |e| { std.c._errno().* = @backingInt(e); return -1; }, } }