1 // Copyright 2016 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 unix 6 7 import ( 8 "syscall" 9 "unsafe" 10 ) 11 12 // getentropy(2)'s syscall number, from /usr/src/sys/kern/syscalls.master 13 const entropyTrap uintptr = 7 14 15 // GetEntropy calls the OpenBSD getentropy system call. 16 func GetEntropy(p []byte) error { 17 _, _, errno := syscall.Syscall(entropyTrap, 18 uintptr(unsafe.Pointer(&p[0])), 19 uintptr(len(p)), 20 0) 21 if errno != 0 { 22 return errno 23 } 24 return nil 25 } 26
