1 // Copyright 2014 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package os 6 7 import "syscall" 8 9 // supportsCloseOnExec reports whether the platform supports the 10 // O_CLOEXEC flag. 11 var supportsCloseOnExec bool 12 13 func init() { 14 // Seems like kern.osreldate is veiled on latest OS X. We use 15 // kern.osrelease instead. 16 osver, err := syscall.Sysctl("kern.osrelease") 17 if err != nil { 18 return 19 } 20 var i int 21 for i = range osver { 22 if osver[i] != '.' { 23 continue 24 } 25 } 26 // The O_CLOEXEC flag was introduced in OS X 10.7 (Darwin 27 // 11.0.0). See http://support.apple.com/kb/HT1633. 28 if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '1' { 29 supportsCloseOnExec = true 30 } 31 } 32
