Processes and Users

barbus · #1 (**permalink**) 10-03-2007

Thx for all the help so far, I really appreciate it, this is the last task I have to do then I am no longer a trainee ^^, which means I can use whatever utility I want. :O

I need to write a script that does more or less what is shown below.
The Users Name
PID TTY TIME CMD
12345 pts/3 00:00:00 vim

The Users2 Name2
PID TTY TIME CMD
12345 pts/2 00:00:00 vim

Print out all users currently logged on to the system and display the processes they are running.
The problem I am facing is I don’t know how to acquire the users name (the actual name not the Username), as for the format it has to be like shown above more or less.

And again I cant use SED or Awk (I will be free to use them after am done with this

).

So its gona be one of those while read line statements.
So the 1 million dollar question is how I format it by field

Will the cut command help me at all here?

I am starting to think this guy uses Google to find the tasks that he wants me to do, This is unbelievably similar to what i want to do

, maybe it is just an exercise that is given to most beginners or something.

Thanks in advanced for any help.

vgersh99 · #2 (**permalink**) 10-03-2007

Quote:

Originally Posted by barbus

The problem I am facing is I don’t know how to acquire the users name (the actual name not the Username), as for the format it has to be like shown above more or less.

Check '/etc/passwd' file for the mapping...

barbus · #3 (**permalink**) 10-03-2007

that did the trick thx, now i guess i must link the the user IDs to the name some how

vgersh99 · #4 (**permalink**) 10-03-2007

Code:

#!/bin/ksh

userID='uucp'

while IFS=: read userIDpasswd junk junk junk userName junk
do
   if [ "${userID}" = "${userIDpasswd}" ]; then
      echo "userID->[${userID}] userName->[${userName}]"
   fi;
done < /etc/passwd

barbus · #5 (**permalink**) 10-03-2007

cool, thx man

I have a question though, this programme will be ran by a few people, if one of those people where to change a process name or amend a users name, will this outcome be effected?

vgersh99 · #6 (**permalink**) 10-03-2007

Quote:

Originally Posted by barbus

cool, thx man

I have a question though, this programme will be ran by a few people, if one of those people where to change a process name or amend a users name, will this outcome be effected?

you'll need write a 'generic' script and pass the user ID to the script as a parameter. The process name(s) will be listed by whatever tool you use all the processes.
The snippet of the code provided above deals only with the userID->userName mapping - not with the listing of processes.

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