如何查看/ bin / sh指向的内容 [英] How to see what /bin/sh points to

问题描述

我正在阅读/ bin / sh和/ bin / bash之间的区别，并遇到了一个有趣的问题/答案：此处

我对答案做了评论，并在标题中问了同样的问题他回答了一个更新的答案：

如何找出/ bin / sh指向系统的内容？

复杂之处在于/ bin / sh可能是符号链接或硬
链接。如果是符号链接，则可以通过以下便携式方式来解决：

 > ％文件-h / bin / sh 
> / bin / sh：指向bash的符号链接
  

如果是硬链接，
尝试

 > ％找到-L / bin -samefile / bin / sh 
> / bin / sh 
> / bin / bash 
  

我尝试了这个并遇到了麻烦，所以我想我将再提出一个问题。 / p>

链接结果中的结果：

 >文件-h / bin / sh 
> / bin / sh：可执行文件（RISC System / 6000）或对象模块
 
>查找-L / bin -samefile / bin / sh 
 >查找：错误的选项-samefile 
  

我缺少什么？
我正在运行AIX：

 > oslevel -s 
 7100-03-03-1415 
  

解决方案

如果需要以编程方式测试它们是否相同，您可以使用 stat 查询 / bin / sh inode $ c>并与 / bin / bash 的 inode 进行比较。

  if [$（stat -L -c％i / bin / sh）-eq $（stat -L -c％i / bin / bash）];然后
 ..... 
 fi 
  

如果您只需要看一下用相同的眼睛运行 stat 命令，看看它们是否返回相同的 inode 号。

  stat -L -c％i / bin / sh 
 stat -L -c％i / bin / bash 
  

I was reading about the differences between /bin/sh and /bin/bash and came across this interesting question/answer: here

I made a comment to the answer asking this same question in my title to which he replied with an updated answer:

How can you find out what /bin/sh points to on your system?

The complication is that /bin/sh could be a symbolic link or a hard link. If it's a symbolic link, a portable way to resolve it is:

> % file -h /bin/sh
> /bin/sh: symbolic link to bash 

If it's a hard link, try

> % find -L /bin -samefile /bin/sh 
> /bin/sh 
> /bin/bash

I tried this and had trouble so I thought I would make a separate question.

My results from the linked answer:

>file -h /bin/sh
>/bin/sh: executable (RISC System/6000) or object module

>find -L /bin -samefile /bin/sh
>find: bad option -samefile

What am I missing? I'm running AIX:

>oslevel -s
7100-03-03-1415

解决方案

If you need to programatically test if they are the same, you can use stat to query the inode of /bin/sh and compare with the inode of /bin/bash.

if [ $(stat -L -c %i /bin/sh) -eq $(stat -L -c %i /bin/bash) ]; then
    .....
fi

If you just need to see with your eyes if they are the same run the stat commands and see if they return the same inode number.

stat -L -c %i /bin/sh
stat -L -c %i /bin/bash

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