}

	return newPIDProcess(pid), nil
}

func (p *Process) writeProcFile(file string, data string) error {
	f, e := OpenFile("/proc/"+itoa.Itoa(p.Pid)+"/"+file, O_WRONLY, 0)
	if e != nil {
		return e
	}
	defer f.Close()
	_, e = f.Write([]byte(data))
	return e
}

func (p *Process) signal(sig Signal) error {
	switch p.pidStatus() {
	case statusDone:

					// and check if that disk
					// appears in outDatedDisks.
					tamperedIndex = index
					filePath := pathJoin(erasureDisks[index].String(), bucket, object, fi.DataDir, "part.1")
					f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
					if err != nil {
						t.Fatalf("Failed to open %s: %s\n", filePath, err)
					}
					f.WriteString("oops") // Will cause bitrot error
					f.Close()
					break
				}

			}

	// with mode 0o777 mkdir honors system umask.
	mkdirAll(pathutil.Dir(filePath), 0o777, s.drivePath) // don't need to fail here

	w, err := s.openFileDirect(filePath, os.O_CREATE|os.O_WRONLY|os.O_EXCL)
	if err != nil {
		return err
	}
	_, err = w.Write(alignedBuf)
	w.Close()
	if err != nil {
		if isSysErrInvalidArg(err) {
			err = errUnsupportedDisk
		}
	}
	return err
}

//
// If w is nil, writerDescriptor returns a File that writes to os.DevNull.
func (c *Cmd) writerDescriptor(w io.Writer) (*os.File, error) {
	if w == nil {
		f, err := os.OpenFile(os.DevNull, os.O_WRONLY, 0)
		if err != nil {
			return nil, err
		}
		c.childIOFiles = append(c.childIOFiles, f)
		return f, nil
	}

	if f, ok := w.(*os.File); ok {
		return f, nil
	}

			extractedFilePath := filepath.Join(targetDir, file.Name)
			if file.FileInfo().IsDir() {
				return os.MkdirAll(extractedFilePath, file.Mode())
			}
			outputFile, err := os.OpenFile(extractedFilePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, file.Mode())
			if err != nil {
				return err
			}
			defer outputFile.Close()
			_, err = io.Copy(outputFile, zippedFile)
			return err
		}()
		if err != nil {

		// to get fresh data.
		// TODO: all.bash runs compilers in parallel. Need to synchronize logging somehow?
		w, err := os.OpenFile(filepath.Join(os.Getenv("GOROOT"), "src", "rulelog"),
			os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
		if err != nil {
			panic(err)
		}
		ruleFile = w
	}
	_, err := fmt.Fprintln(ruleFile, s)
	if err != nil {
		panic(err)
	}
}

var ruleFile io.Writer