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unveil_openbsd.go (1058B)

      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 }