我可以告诉 find 不恢复初始工作目录吗？

Question

findsudo -u如果初始工作目录对用户不可见，则在运行时无法“恢复初始工作目录” 。这会导致 find 总是打印一条烦人的Permission denied警告消息：

$ pwd
/home/myuser
$ sudo -u apache find /home/otheruser -writable
find: failed to restore initial working directory: Permission denied

防止 find 打印此消息的最佳方法是什么？

一种方法是cd /在运行 find 之前更改为 find 用户可以恢复的目录，例如。理想情况下，我只想找到诸如此类的选项，--do-not-restore-initial-working-directory但我想这不可用。;)

我主要使用基于 RedHat 的发行版。

Answer 1

清理似乎是find.

https://github.com/Distrotech/findutils/blob/e6ff6b550f7bfe41fb3d72d4ff67cfbb398aa8e1/find/find.c#L231

在main中find.c

  cleanup ();
  return state.exit_status;
}

cleanup 电话 cleanup_initial_cwd

https://github.com/Distrotech/findutils/blob/e6ff6b550f7bfe41fb3d72d4ff67cfbb398aa8e1/find/util.c#L534

并cleanup_initial_cwd实际更改目录

https://github.com/Distrotech/findutils/blob/e6ff6b550f7bfe41fb3d72d4ff67cfbb398aa8e1/find/util.c#L456

static void
cleanup_initial_cwd (void)
{
  if (0 == restore_cwd (initial_wd))
    {
      free_cwd (initial_wd);
      free (initial_wd);
      initial_wd = NULL;
    }
  else
    {
      /* since we may already be in atexit, die with _exit(). */
      error (0, errno,
         _("failed to restore initial working directory"));
      _exit (EXIT_FAILURE);
    }
}

正如您所建议的，您可以尝试使用首先cd进入的 shell 脚本/。（此脚本存在一些问题，例如无法处理多个目录进行搜索）

#!/bin/sh
path="$(pwd)/$1"
shift
cd /
exec find "$path" "$@"

您还可以过滤 stderr 的输出以删除不需要的消息

#!/bin/sh
exec 3>&2
exec 2>&1
exec 1>&3
exec 3>&-
3>&2 2>&1 1>&3 3>&- find "$@" | grep -v "^find: failed to restore initial working directory"
# not sure how to recover find's exit status
exit 0