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// Copyright 2023 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 os_test
import (
"internal/testenv"
"os"
"testing"
)
func TestFindProcessViaPidfd(t *testing.T) {
testenv.MustHaveGoBuild(t)
t.Parallel()
if err := os.CheckPidfdOnce(); err != nil {
// Non-pidfd code paths tested in exec_unix_test.go.
t.Skipf("skipping: pidfd not available: %v", err)
}
p, err := os.StartProcess(testenv.GoToolPath(t), []string{"go"}, &os.ProcAttr{})
if err != nil {
t.Fatalf("starting test process: %v", err)
}
p.Wait()
// Use pid of a non-existing process.
proc, err := os.FindProcess(p.Pid)
// FindProcess should never return errors on Unix.
if err != nil {
t.Fatalf("FindProcess: got error %v, want <nil>", err)
}
// FindProcess should never return nil Process.
if proc == nil {
t.Fatal("FindProcess: got nil, want non-nil")
}
if proc.Pid != os.PidDone {
t.Fatalf("got pid: %v, want %d", proc.Pid, os.PidDone)
}
// Check that all Process' public methods work as expected with
// "done" Process.
if err := proc.Kill(); err != os.ErrProcessDone {
t.Errorf("Kill: got %v, want %v", err, os.ErrProcessDone)
}
if err := proc.Signal(os.Kill); err != os.ErrProcessDone {
t.Errorf("Signal: got %v, want %v", err, os.ErrProcessDone)
}
if _, err := proc.Wait(); err != os.ErrProcessDone {
t.Errorf("Wait: got %v, want %v", err, os.ErrProcessDone)
}
// Release never returns errors on Unix.
if err := proc.Release(); err != nil {
t.Fatalf("Release: got %v, want <nil>", err)
}
}
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