From 109be507377fe7f6e8819ac94041d3fdcdf6fd2f Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:18:25 +0200 Subject: Adding upstream version 1.19.8. Signed-off-by: Daniel Baumann --- src/os/exec/internal/fdtest/exists_plan9.go | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 src/os/exec/internal/fdtest/exists_plan9.go (limited to 'src/os/exec/internal/fdtest/exists_plan9.go') diff --git a/src/os/exec/internal/fdtest/exists_plan9.go b/src/os/exec/internal/fdtest/exists_plan9.go new file mode 100644 index 0000000..8886e06 --- /dev/null +++ b/src/os/exec/internal/fdtest/exists_plan9.go @@ -0,0 +1,20 @@ +// 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 +} -- cgit v1.2.3