如何找出父shell的子壳体内的用户？ [英] How to find out the user of parent shell inside a child shell?

问题描述

假设父shell的用户是富。如果你运行像须藤-u酒吧-i ，那么你在与用户子shell 栏。所以，我怎么能找出孩子壳内父shell的用户？也就是说，在上述情况下，我怎么能知道父shell的用户是富？

更新结果
我的理解是，一些黑客，就有可能实现这一目标用 PS 。不过，我会更感兴趣的是少哈克和更标准的方式，如果可能的话。

更新2 结果
从答案的帮助下，我终于祭出了以下解决方案：

 ＃从父shell，用户是foo
$ sudo的-u酒吧-i家长= foo的＃从子shell，显示母公司用户foo
$ PSü-p $ PPID | grep的家长|切-d = -f2
 

解决方案

您可以使用 $ PPID 变量来协助您的命令或两个一起：

 ＃！/斌/庆典
USER =`PSü-p $ PPID | AWK'{打印$ 1}'|尾-1`
回声$ USER
 

Suppose the user of parent shell is foo. If you run something like sudo -u bar -i, then you are in a child shell with user bar. So, how can I find out the user of the parent shell inside the child shell? Namely, in the case above, how can I know that the user of parent shell is foo?

update
I understand that, with some hack, it is possible to achieve this using ps. However, I would be much more interested in a less hacky and more standard way, if all possible.

update 2
With help from the answers, I finally resorted to the following solution:

# from parent shell, user is foo
$ sudo -u bar -i PARENT=foo

# from child shell, show parent user foo
$ ps u -p $PPID | grep PARENT | cut -d= -f2

解决方案

You can use the $PPID variable to assist you along with a command or two:

#!/bin/bash
USER=`ps u -p $PPID | awk '{print $1}'|tail -1`
echo $USER

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