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// Copyright 2016 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.
//go:build openbsd
// This, on the face of it, bizarre testing mechanism is necessary because
// the only reliable way to gauge whether or not a pledge(2) call has succeeded
// is that the program has been killed as a result of breaking its pledge.
package unix_test
import (
"flag"
"fmt"
"os"
"os/exec"
"path/filepath"
"testing"
"golang.org/x/sys/unix"
)
type testProc struct {
fn func() // should always exit instead of returning
cleanup func() error // for instance, delete coredumps from testing pledge
success bool // whether zero-exit means success or failure
}
var (
testProcs = map[string]testProc{}
procName = ""
)
const (
optName = "sys-unix-internal-procname"
)
func init() {
flag.StringVar(&procName, optName, "", "internal use only")
}
// testCmd generates a proper command that, when executed, runs the test
// corresponding to the given key.
func testCmd(procName string) (*exec.Cmd, error) {
exe, err := os.Executable()
if err != nil {
return nil, err
}
cmd := exec.Command(exe, "-"+optName+"="+procName)
cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
return cmd, nil
}
// ExitsCorrectly is a comprehensive, one-line-of-use wrapper for testing
// a testProc with a key.
func ExitsCorrectly(procName string, t *testing.T) {
s := testProcs[procName]
c, err := testCmd(procName)
defer func() {
if s.cleanup() != nil {
t.Fatalf("Failed to run cleanup for %s", procName)
}
}()
if err != nil {
t.Fatalf("Failed to construct command for %s", procName)
}
if (c.Run() == nil) != s.success {
result := "succeed"
if !s.success {
result = "fail"
}
t.Fatalf("Process did not %s when it was supposed to", result)
}
}
func TestMain(m *testing.M) {
flag.Parse()
if procName != "" {
testProcs[procName].fn()
}
os.Exit(m.Run())
}
// For example, add a test for pledge.
func init() {
testProcs["pledge"] = testProc{
func() {
fmt.Println(unix.Pledge("", ""))
os.Exit(0)
},
func() error {
files, err := os.ReadDir(".")
if err != nil {
return err
}
for _, file := range files {
if filepath.Ext(file.Name()) == ".core" {
if err := os.Remove(file.Name()); err != nil {
return err
}
}
}
return nil
},
false,
}
}
func TestPledge(t *testing.T) {
ExitsCorrectly("pledge", t)
}