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Full Discussion: Add leading zeroes to numbers in a file
Top Forums Shell Programming and Scripting Add leading zeroes to numbers in a file Post 302206256 by raidzero on Tuesday 17th of June 2008 10:31:07 AM
Old 06-17-2008
Add leading zeroes to numbers in a file
Hello, I am (trying) to write a script that will check to see how many users are logged on to my machine, and if that number is more than 60 I need to kill off all the oldest sessions that are over 60. So far I have been able to check how many users are on and now I am at the part where I have to actually kill them off. I have chosen to write the idle times for all the logged on users into a file, but I need to add leading zeroes to them in order to properly sort them. How do I do this? the file is /tmp/uidle. This is my code so far:

Code:
numusers=$(who -q | grep Total | tr -s " " | cut -d" " -f3)                
echo Total number of users: ${numusers}                                    
if test $numusers -gt 60; then                                             
diff=$(expr $numusers - 60)                                                
echo "There are $diff too many users, killing the $diff oldest users..."   
who -u | sort -k4.2,6 | grep bhb | tr -s " " | cut -d" " -f5 >> /tmp/uidle 
else                                                                       
echo "There are less than 60 users. Exiting"                               
fi                                                                         
exit 1

Thanks
 

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LEARN ABOUT HPUX

wall

wall(1M)																  wall(1M)

NAME

       wall - write message to all users

SYNOPSIS

       groupname] [file]

DESCRIPTION

       Without	arguments, the command reads a message from standard input until end-of-file.  Then it sends this message to all currently logged-
       in users preceded by:

       If the option is specified, sends the message to all currently logged-in groupname members (as specified in preceded by:

       If file is specified, reads file instead of standard input.

       is typically used to warn all users prior to shutting down the system.

       The sender must have appropriate privileges to override any protections the users may have invoked (see mesg(1)).

       has timing delays, and takes at least 30 seconds to complete.

       You must have appropriate privileges to override any protections users may have invoked (see mesg(1)).

EXTERNAL INFLUENCES

   International Code Set Support
       Single- and multibyte character code sets are supported.

DIAGNOSTICS

       The open on a user's tty file failed.

WARNINGS

       The command will be WITHDRAWN from X/Open standard and may not be portable to other vendor's platforms.

AUTHOR

       was developed by AT&T and HP.

FILES

SEE ALSO

       mesg(1), write(1).

STANDARDS CONFORMANCE

																	  wall(1M)
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