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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

mknod

mknod(5)							File Formats Manual							  mknod(5)

NAME

       mknod.h - header file of macros for handling device numbers

SYNOPSIS

DESCRIPTION

       The header file defines macros to create and interpret device identification numbers for use with the system call (see mknod(2)).

       The  use  of these macros is architecture-dependent.  See the System Administration Manual for your system for information on how to select
       major and minor device numbers.

       contains the macro

       which packs the major and minor components into a device identification number suitable for the dev argument of and the two macros:

       which extract the major and minor number components, respectively, from a device identification number, dev.

       The macro is a specification (see printf(3S)) that prints the minor number in the format best suited to the particular  implementation;	it
       is used by the long format of the command (see ls(1)) to show the minor numbers for device files.

       The  base of the number is indicated in the same way as in the C programming language: no leading zero for decimal, leading zero for octal,
       and leading for hexadecimal.

SEE ALSO

       ls(1), mknod(1M), mknod(2), printf(3S).

																	  mknod(5)
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