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Full Discussion: Can you override root shell?
Top Forums UNIX for Dummies Questions & Answers Can you override root shell? Post 302431888 by cuchulainn on Wednesday 23rd of June 2010 06:57:57 AM
Old 06-23-2010
Can you override root shell?

Hi,

I'm trying to figure out the logic of my user shell and root shell Smilie
This might be best illustrated with an example.

If I log into the linux host I'm using and run the following:
Code:
-bash-3.2$ which python
/usr/local/bin/python

I now run sudo bash to become root and run the same command
Code:
bash-3.2# which python
/usr/bin/python

So roots path overrides the users path.

However, I thought that if I now run .bash_profile from the users directory:
Code:
bash-3.2# source .bash_profile

the users path would override the root path but apparently not as:
Code:
bash-3.2# id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)

bash-3.2# which python
/usr/bin/python

it still returns python from the root directory shell.
Is there any way to override this?
I know I should probably be running commands as:
sudo <command> etc but I'm confused as to the logic employed and I haven't been able to clear it up with google searches.

Can anyone outline the logic?

Last edited by pludi; 06-23-2010 at 08:03 AM.. Reason: code tags, please...
 

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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. SunOS 5.10 30 Aug 2004 getusershell(3C)
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