java - 从 Java 调用时 OS X 命令行应用程序无法找到目录

Question

如果我在终端中运行它，它工作正常:

lsof -F n +D /some/directory

但是当我从 Java 运行同样的东西时却没有:

                    Process lsof = new ProcessBuilder("lsof", "-F", "n", "+D", "'/some/directory'").start();
                    lsof.waitFor();

                    if (lsof.exitValue() != 0) {
                        BufferedReader reader = null;
                        try {
                            reader = new BufferedReader(new InputStreamReader(lsof.getErrorStream()));
                            String line = null;
                            StringBuffer sb = new StringBuffer();
                            while ((line = reader.readLine()) != null) {
                                sb.append(line);
                                sb.append("\n");
                            }

                            log.warning("STDOUT:\n" + sb.toString());
                        } finally {
                            if (reader != null) {
                                reader.close();
                            }
                        }
                    }

当从 Java 调用时，它返回:

STDOUT:
  lsof: WARNING: can't stat('/some/directory'): No such file or directory
lsof 4.85
 latest revision: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/
 latest FAQ: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/FAQ
 latest man page: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/lsof_man
 usage: [-?abhlnNoOPRtUvV] [+|-c c] [+|-d s] [+D D] [+|-f[cgG]]
 [-F [f]] [-g [s]] [-i [i]] [+|-L [l]] [+|-M] [-o [o]] [-p s]
[+|-r [t]] [-s [p:s]] [-S [t]] [-T [t]] [-u s] [+|-w] [-x [fl]] [--] [names]
Use the ``-h'' option to get more help information.

谁能解释一下为什么吗？

Answer 1

new ProcessBuilder("lsof", "-F", "n", "+D", "'/some/directory'")
                                             ^               ^

删除 /some/directory 周围的单引号。它们被传递到 lsof 程序并被解释为路径名的一部分。