vendor/golang.org/x/sys/unix/openbsd_unveil.go

   1 // Copyright 2018 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 // +build openbsd
   6
   7 package unix
   8
   9 import (
  10         "syscall"
  11         "unsafe"
  12 )
  13
  14 // Unveil implements the unveil syscall.
  15 // For more information see unveil(2).
  16 // Note that the special case of blocking further
  17 // unveil calls is handled by UnveilBlock.
  18 func Unveil(path string, flags string) error {
  19         pathPtr, err := syscall.BytePtrFromString(path)
  20         if err != nil {
  21                 return err
  22         }
  23         flagsPtr, err := syscall.BytePtrFromString(flags)
  24         if err != nil {
  25                 return err
  26         }
  27         _, _, e := syscall.Syscall(SYS_UNVEIL, uintptr(unsafe.Pointer(pathPtr)), uintptr(unsafe.Pointer(flagsPtr)), 0)
  28         if e != 0 {
  29                 return e
  30         }
  31         return nil
  32 }
  33
  34 // UnveilBlock blocks future unveil calls.
  35 // For more information see unveil(2).
  36 func UnveilBlock() error {
  37         // Both pointers must be nil.
  38         var pathUnsafe, flagsUnsafe unsafe.Pointer
  39         _, _, e := syscall.Syscall(SYS_UNVEIL, uintptr(pathUnsafe), uintptr(flagsUnsafe), 0)
  40         if e != 0 {
  41                 return e
  42         }
  43         return nil
  44 }