closeFd

pub fn closeFd(fd: posix.fd_t) void {
    if (native_os == .wasi and !builtin.link_libc) {
        switch (std.os.wasi.fd_close(fd)) {
            .SUCCESS, .INTR => {},
            .BADF => recoverableOsBugDetected(), // use after free
            else => recoverableOsBugDetected(), // unexpected failure
        }
    } else switch (posix.errno(posix.system.close(fd))) {
        .SUCCESS, .INTR => {}, // INTR still a success, see https://github.com/ziglang/zig/issues/2425
        .BADF => recoverableOsBugDetected(), // use after free
        else => recoverableOsBugDetected(), // unexpected failure
    }
}