finding original login name, not current name

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Operating Systems AIX finding original login name, not current name
# 1  
Old 02-19-2008
Question finding original login name, not current name

Hi all,

I've searched around and not found any specific solution to my problem, so wondered if someone out there could help.

I'm in the process of migrating some shell scripts from HP UNIX to AIX and one of the scripts uses the 'logname' command.

On HP 'logname' returns the login name, which is not necessarily the current user name.

But under AIX it returns the current user, not the login name.

I telnet to a UNIX box as 'user1'.
I then use 'su - someotheruser' to switch to an application account (direct logins are not allowed due to security constraints).

If I run 'logname' under HP it returns 'user1'.
But under AIX it returns 'someotheruser'.

For the script I need to know who the actual user is, not the current user name that was switched to. (This is for audit reasons to keep tabs on who is doing what on the system).

So is there anyway to return the actual logon name used on AIX, rather than the current user name?

# 2  
Old 02-19-2008
Your only solution:
use "who am i" and keep the first field giving you the HP equivalent...

All the best
# 3  
Old 02-19-2008
Originally Posted by vbe
Your only solution:
use "who am i" and keep the first field giving you the HP equivalent...
Already tried that, didn't work either.

huedgoat:webmeth /home/webmeth $who am i
webmeth   pts/2

webmeth is the user I switched to, using 'su' from my account, but it's my account name I need, not the current account.

# 4  
Old 02-19-2008
vbe@ ro3: /home/mbo> who am i
vbe pts/5 Feb 19 14:46 (draco)
vbe@ ro3: /home/mbo> id
uid=50287(mbo) gid=1(staff)
vbe@ ro3: /home/mbo> exit
vbe@ ro3: /home# id
uid=0(root) gid=0(system) groups=1(staff)
vbe@ ro3: /home# who am i
vbe pts/5 Feb 19 14:46 (draco)
vbe@ botero3: /home# su - mbo
vbe@ ro3: /home/mbo> id
uid=50287(mbo) gid=1(staff)
vbe@ botero3: /home/mbo> whoami
vbe@ ro3: /home/mbo> who am i
vbe pts/5 Feb 19 14:46 (draco)
vbe@ ro3: /home/mbo> oslevel
vbe@ ro3: /home/mbo>

Now looking at my prompt, it could be an alternative...
# 5  
Old 02-19-2008
While I was at it I looked at logname on that aix box, and it works fine...
so I would guess there is something not quite so right on your system, what OS is it? Arent you beeing fooled by some alias or home command?

Good luck
# 6  
Old 02-19-2008
It's AIX Version 5.3, a brand new box bought and installed a few months ago for a new platform we are building.

I think your right about a possible configuration problem with the box.

We have 9 new AIX boxes all 5.3 all should be set up the same. I'd only checked the first two, with the same results as above.

But after your comment I decided to try some of the others, as two of them were built by different people (as it was done at a different time), although to the same cook-book.

The forth box I tried worked correctly, returning the actual user not the account currently in use.

So looks like the initial boxes have been configured wrong somewhere, so I'll pass my findings on to the relevant team and see if they can figure out what they did wrong!

Thanks for you help, nice to get confirmation on how the command should have worked.

# 7  
Old 02-20-2008

Did you try:
which logname
ls -al /usr/bin/logname
-r-xr-xr-x 1 bin bin 2442 Jul 12 2004 /usr/bin/logname
vbe@ lo14: /> file /usr/bin/logname
/usr/bin/logname: executable (RISC System/6000) or object module

You might have been spoofed by a custom command or alias - have you tried by using the command with absolute path or going to /usr/bin and typeing ./logname to see if it changes something?

Good luck
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