02-05-2009
How to get a login name of a person who used 'su' and act with different user-name?
I need to realize the user login name after he/she used the 'su' command to log under another name (for specific privileges.)
I am on SunOS v5.6, and here by now I could not find a way to figured it out.
In another Thread I've get an advise from Linux user to use 'ps afxj' that display a processes tree and shows up the originated 'su' command.
But on Sun I could not find a way to get something simular that would display the 'su'
The main reason for that task is to use the 'write' comand to send a message to people's terminal who is loged by 'su' as a specific user.
I have a script that runs background and monitoring some condition. I would like it time to time to send some message.
It is started by someone, who used 'su', but could after that close the seccion and even log off completely.
Although all the time someone has use the specific user-name, loged by 'su' - it is a production control name.
I need the script to be able send a mesage directly to anyone who now is under that production-control-logname.
How that could be done in Sun UNIX?
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LEARN ABOUT SUNOS
logname
logname(1) User Commands logname(1)
NAME
logname - return user's login name
SYNOPSIS
logname
DESCRIPTION
The logname utility will write the user's login name to standard output. The login name is the string that would be returned by the getlo-
gin(3C) function. Under the conditions where getlogin() would fail, logname will write a diagnostic message to standard error and exit with
a non-zero exit status.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of logname: LANG, LC_ALL, LC_CTYPE,
LC_MESSAGES, and NLSPATH.
EXIT STATUS
The following error values are returned:
0 Successful completion.
>0 An error occurred.
FILES
/etc/profile environment for user at login time
/var/adm/utmpx user and accounting information
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
env(1), login(1), getlogin(3C), utmpx(4), attributes(5), environ(5), standards(5)
SunOS 5.10 3 Nov 2000 logname(1)