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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unix
import (
"syscall"
"unsafe"
)
// Unveil implements the unveil syscall.
// For more information see unveil(2).
// Note that the special case of blocking further
// unveil calls is handled by UnveilBlock.
func Unveil(path string, flags string) error {
pathPtr, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
flagsPtr, err := syscall.BytePtrFromString(flags)
if err != nil {
return err
}
_, _, e := syscall.Syscall(SYS_UNVEIL, uintptr(unsafe.Pointer(pathPtr)), uintptr(unsafe.Pointer(flagsPtr)), 0)
if e != 0 {
return e
}
return nil
}
// UnveilBlock blocks future unveil calls.
// For more information see unveil(2).
func UnveilBlock() error {
// Both pointers must be nil.
var pathUnsafe, flagsUnsafe unsafe.Pointer
_, _, e := syscall.Syscall(SYS_UNVEIL, uintptr(pathUnsafe), uintptr(flagsUnsafe), 0)
if e != 0 {
return e
}
return nil
}
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