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Full Discussion: For loop or while loop from a text file
Top Forums Shell Programming and Scripting For loop or while loop from a text file Post 303013301 by nms on Monday 19th of February 2018 10:42:32 AM
Old 02-19-2018
For loop or while loop from a text file
Hi all,

i developed a script to measure the uptime of a process in a Solaris 10/11 environments.
All is well, but i came across a situation where there are multiple processes of the same name. Basically i have the following result file:

Code:
beVWARS 13357 19592122
beVWARS 14329 19591910
beVWARS 6371 20436149
beVWARS 6368 20436149
beVWARS 6374 20436149
beVWARS 13361 19592118
beVWARS 13988 19591989
beVWARS 6367 20436149
beVWARS 6365 20436149
beVWARS 6355 20436149
beVWARS 6363 20436149
beVWARS 14055 19591982
beVWARS 13267 19592147
beVWARS 13562 19592097
beVWARS 6361 20436149
beVWARS 14228 19591944

Where first column is the process name, followed by it's pid and the uptime in seconds.

i am trying to find a way to get the uptime vs. an if condition (by a loop?) where if the uptime is less then say 3600 seconds it outputs the process and it's pid on the same line.

Bascially i tried:

Code:
while read line; do
if [[ $line -lt $CRITICAL_SIZE ]]; then
echo -n `grep $line $CRONOUTFILE | awk '{print$2,$3}'`
fi
done <<< "$TIME"

Where $TIME contains only the 3rd column, i.e. the uptime, but it's not working as it should.
$CRONOUTFILE is the output file as shown above.
What i am trying to achieve is to output only the process and pid in a similar output:

Critical - the following processes $PROCESS are less then $CRITICAL_SIZE - $PID:$TIME, $PID:$TIME...,$PID:$TIME

Where the $PROCESS can be easily set an argument in the script.

I am totally confused in using the for loops or the while loop. May you kindly give me some hints?

Rgds,

Matthew
 

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LEARN ABOUT PHP

uptime

UPTIME(1)							   User Commands							 UPTIME(1)

NAME

       uptime - Tell how long the system has been running.

SYNOPSIS

       uptime [options]

DESCRIPTION

       uptime  gives  a one line display of the following information.	The current time, how long the system has been running, how many users are
       currently logged on, and the system load averages for the past 1, 5, and 15 minutes.

       This is the same information contained in the header line displayed by w(1).

       System load averages is the average number of processes that are either in a runnable or uninterruptable state.	A process  in  a  runnable
       state is either using the CPU or waiting to use the CPU.  A process in uninterruptable state is waiting for some I/O access, eg waiting for
       disk.  The averages are taken over the three time intervals.  Load averages are not normalized for the number of CPUs in  a  system,  so  a
       load average of 1 means a single CPU system is loaded all the time while on a 4 CPU system it means it was idle 75% of the time.

OPTIONS

       -p, --pretty
	      show uptime in pretty format

       -h, --help
	      display this help text

       -s, --since
	      system up since, in yyyy-mm-dd HH:MM:SS format

       -V, --version
	      display version information and exit

FILES

       /var/run/utmp
	      information about who is currently logged on

       /proc  process information

AUTHORS

       uptime was written by Larry Greenfield <greenfie@gauss.rutgers.edu> and Michael K. Johnson <johnsonm@sunsite.unc.edu>

SEE ALSO

       ps(1), top(1), utmp(5), w(1)

REPORTING BUGS

       Please send bug reports to <procps@freelists.org>

procps-ng							   December 2012							 UPTIME(1)
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