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