mirror of
https://github.com/golang/go
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32 lines
768 B
Go
32 lines
768 B
Go
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// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import "syscall"
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// supportsCloseOnExec reports whether the platform supports the
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// O_CLOEXEC flag.
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var supportsCloseOnExec bool
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func init() {
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// Seems like kern.osreldate is veiled on latest OS X. We use
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// kern.osrelease instead.
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osver, err := syscall.Sysctl("kern.osrelease")
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if err != nil {
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return
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}
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var i int
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for i = range osver {
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if osver[i] != '.' {
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continue
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}
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}
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// The O_CLOEXEC flag was introduced in OS X 10.7 (Darwin
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// 11.0.0). See http://support.apple.com/kb/HT1633.
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if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '1' {
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supportsCloseOnExec = true
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}
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}
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