How to read values from stdin then and there?

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Hi,

I'm new to Linux environment. I'm trying to get all commands executed by user and place it in a file. What I thought to do is read the value from stdin & directly place it in one file. But I don't know how to read from stdin using script.

Please help me..
Thanks in advance:)

--
Yugeshkumar V

Posted 8-Dec-11 1:03am

IT-NEWBIE

Updated 8-Dec-11 1:11am

v2

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3 solutions

Solution 2

The shell has a command called "script" which saves input and output to a text file.

http://www.linuxhowtos.org/Tips%20and%20Tricks/using_script.htm[^]

Posted 8-Dec-11 3:03am

Graham Breach

Solution 1

You would need to write your own shell which logs all commands to a file. Or, modify the default user shell on your system to do the same, and ensure that users are not able to switch to one of the alternatives.

Posted 8-Dec-11 2:27am

Richard MacCutchan

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IT-NEWBIE 8-Dec-11 8:39am

Please provide me an idea to get the commands given by user on console, After that only I can place it in one file..

Richard MacCutchan 8-Dec-11 9:31am

This is not a simple matter of setting a switch. You will either need to write your own shell which the user will use, or get hold of the Linux source code and modify one of the existing shells (probably bash).

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Michel [mjbohn] · Accepted Answer · 2011-12-08T03:55:00

Solution 3

Use 'bash' as login shell for all users. bash is writing all commands to bash_history at users /home

But there's at least one pitfall. bash_history is writable by the user and can be modified. Same applies to command 'script'.

Posted 8-Dec-11 3:55am

Michel [mjbohn]

Comments

Richard MacCutchan 8-Dec-11 10:04am

Yes I forgot about this, but, as you say, there is a slight pitfall. I also think the history rolls over after so many entries.

Michel [mjbohn] 8-Dec-11 10:13am

Indeed it does roll over. It's controlled by $HISTSIZE or $HISTFILESIZE