}
			envvalue := make([]byte, len(v)-i)
			copy(envvalue, v[i+1:])
			envvParsed = append(envvParsed, envItem{envname, &envvalue[0], len(v) - i})
		}
	}

	// Allocate child status pipe close on exec.
	e := cexecPipe(p[:])

	if e != nil {
		return 0, e
	}

	// Kick off child.
	pid, err = forkAndExecInChild(argv0p, argvp, envvParsed, dir, attr, p[1], sys.Rfork)

	if err != nil {
		if p[0] >= 0 {