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661d749b94
Future OpenBSD releases will remove the syscall(2) interface.
This converts the Pledge and Unveil calls to use pledge(2) and
unveil(2) from libc, rather than indirectly through syscall(2).
Updates golang/go#63900.
Change-Id: I61e22d8f52f16c8f5e4c0717acae0d5bf4271503
GitHub-Last-Rev: ebc0461460
GitHub-Pull-Request: golang/sys#146
Reviewed-on: https://go-review.googlesource.com/c/sys/+/468095
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Aaron Bieber <aaron@bolddaemon.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package unix
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import "fmt"
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// Unveil implements the unveil syscall.
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// For more information see unveil(2).
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// Note that the special case of blocking further
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// unveil calls is handled by UnveilBlock.
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func Unveil(path string, flags string) error {
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if err := supportsUnveil(); err != nil {
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return err
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}
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pathPtr, err := BytePtrFromString(path)
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if err != nil {
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return err
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}
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flagsPtr, err := BytePtrFromString(flags)
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if err != nil {
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return err
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}
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return unveil(pathPtr, flagsPtr)
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}
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// UnveilBlock blocks future unveil calls.
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// For more information see unveil(2).
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func UnveilBlock() error {
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if err := supportsUnveil(); err != nil {
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return err
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}
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return unveil(nil, nil)
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}
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// supportsUnveil checks for availability of the unveil(2) system call based
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// on the running OpenBSD version.
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func supportsUnveil() error {
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maj, min, err := majmin()
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if err != nil {
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return err
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}
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// unveil is not available before 6.4
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if maj < 6 || (maj == 6 && min <= 3) {
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return fmt.Errorf("cannot call Unveil on OpenBSD %d.%d", maj, min)
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}
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return nil
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}
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