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// 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
}
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