wait run and stop program

HabibR · 09-26-2018, 05:32 AM

Hi,
I am a newbie to Linux.
I want to run an external program in Ubuntu via the command prompt
Is it possible to run the program on the command line with a wait for 10 seconds, then run 300 seconds and kill the process after that with saving the file in CSV and show the output in command line???
Or its need a script to run? if its need a script then what type of script it needed
Additionally, i need to play a beep sound along with that program
Any help will be really appreciated
Thanks
habib

berndbausch · 09-26-2018, 06:07 AM

What is an external program?

On the command line:

Code:

$ sleep 10; program&
$ PID=$!
$ sleep 300
$ kill $PID

The ampersand (&) runs your program in the background. $! is the process ID of the last process you ran in the background.

This doesn’t solve your CSV problem, but I don’t understand what you want to save in CSV format.

I don’t understand the beep requirement either. Beep at the beginning, the end or during the program? Take an ASCII table, find the beep character and output it as instructed here: https://stackoverflow.com/questions/...ers-using-echo.

BW-userx · 09-26-2018, 06:40 AM

if you want to run a script and be more specif about the app/script pid and sleep pid. this is a function I wrote a long time ago. IT could be of use to you.

Code:

#kill the prior pids leaving the new one

function killOldPid(){
appname=$0
appname="${appname#*/}" #removes ./ from cli to get name in process

if [ $(pgrep -u $USER $appname | wc -l) -ge 2 ] && [ $(pgrep -u $USER sleep | wc -l ) -ge 1 ]; then
	echo "$(pgrep -u $USER $appname | wc -l) "pid# --" $(pgrep -u $USER sleep | wc -l)"
	pkill -u $USER -o sleep
	pkill -u $USER -o $appname 
else
     echo "$appname pid $(pgrep -u $USER $appname ) sleep pid $(pgrep -u $USER sleep)"
fi

}

it was written for a loop so that it kills the prior pid(s) when it calls the external program to run again after a set time.

HabibR · 09-26-2018, 08:14 AM

Hi,
Thanks for your reply, I was trying to log the data by Serialdump-linux program.
The requirement of beep in this program is to let the user know that program has started and after certain (300 seconds) when the program close it let the user know the program is stopped. It does not require to run the program in loop
Thanks

Quote:

Originally Posted by berndbausch

What is an external program?

On the command line:

Code:

$ sleep 10; program&
$ PID=$!
$ sleep 300
$ kill $PID

The ampersand (&) runs your program in the background. $! is the process ID of the last process you ran in the background.

This doesn’t solve your CSV problem, but I don’t understand what you want to save in CSV format.

I don’t understand the beep requirement either. Beep at the beginning, the end or during the program? Take an ASCII table, find the beep character and output it as instructed here: https://stackoverflow.com/questions/...ers-using-echo.

berndbausch · 09-26-2018, 08:57 AM

The beep requirement is easy to fulfill, just echo the beep character before you run program and before (or after) you kill it. You compute has to be configured to actually beep rather than "beep" by flashing the screen.

I can't help with the CSV requirement, because I don't know how the output of serialdump-linux is structured. If its output goes to stdout, use the tee command to send it to a file and the screen.