Файловый менеджер - Редактировать - /usr/local/go/src/os/exec/internal/fdtest/exists_plan9.go
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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 plan9 package fdtest import ( "syscall" ) const errBadFd = syscall.ErrorString("fd out of range or not open") // Exists returns true if fd is a valid file descriptor. func Exists(fd uintptr) bool { var buf [1]byte _, err := syscall.Fstat(int(fd), buf[:]) return err != errBadFd }
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