blob: 472a802d7baa52cfa578bbb9349ebf7ea2b3f654 [file] [log] [blame]
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build unix || wasm
// Package fdtest provides test helpers for working with file descriptors across exec.
package fdtest
import (
"syscall"
)
// Exists returns true if fd is a valid file descriptor.
func Exists(fd uintptr) bool {
var s syscall.Stat_t
err := syscall.Fstat(int(fd), &s)
return err != syscall.EBADF
}