Using "Ctrl-C" in Scripting

[Ryan Bernard]

Hi anybody know how we can use "Ctrl-C" in a script?,

It required in the script to break out from certain processes.

Thanks alot for your help~

[Wim Rombauts · Accepted solution]

In vi, while in insert mode, first pres Ctrl-V and then Ctrl-C. That will insert the Ctrl-C in your script.

[Dennis Handly]

If you type Control-C, your script should be aborted. If you want to trap it, you can use "trap command INTR".

If you want to send a control-C to another process you can use:
kill -INTR PID

[Sagar Sirdesai]

Hi
Please use the trap command in your script

trap "exit" 2

This exit the script whenever it receives a
Ctlr C

Sagar

[Dennis Handly]

You may have to use INT where I had INTR.

[Laurent Menase]

or Do you want on ctrlC kill some of children processes?



myproc1 &
firstpid=$!
myproc2 &
secondpid=$!
myproc3 &
thirdpid=$!

trap "kill -SIGINT $secondpid" 2

Then if you CtrlC it will kill only myproc2

[James R. Ferguson]

Hi Ryan:

You can change what the trap does, too. You might want to disable the Ctrl_C interrupt (INT) in a critical region of your script's code and then change it to "normal" behavior. For example:

# cat ./myctrl_c
#!/usr/bin/sh
function paint
{
typeset -i n
while (( n < 9 ))
do
echo $1
(( n=n+1 ))
sleep 1
done
}
trap 'echo That was not allowed!' INT
paint "+"
echo "...try interrupting now"
trap 'echo CTRL_C sensed;exit' INT
paint "-"
exit 0

See the 'sh-posix' manpages for more information, too.

Regards!

...JRF...

[Ryan Bernard]

Thanks alot for your recommendations. Currently trying out the recommendations.

1 more thing, how do we actually do a 60sec wait state?

[Sagar Sirdesai]

Hi'Use the sleep command

sleep 60

This will wait for 60 seconds

Sagar

[Sagar Sirdesai]

Hi Ryan

Please assign points if you have got the answers you needed

Sagar

[Ryan Bernard]

Hi Sagar

Sorry in the delay in assigning points as I am trying to check if the provided solutions help. Thanks alot for your help.


Wonder if somebody can help as I am stuck. I trying to do a tusc command for 60 secs before it cntrl-C, but not too sure how to do it. Initially I try the below steps but think it never go to sleep as the tusc command is still running, hence it never cntrl C

tusc
sleep (60)
ctrl-C

[Laurent Menase]

You should use kill and tusc in background

tusc myprog &
thepid=$!
sleep 60
kill -2 $thepid



If you want attach to the process
tusc -o filresult pid &
thepid=$!
sleep 60
kill -2 $thepid

[James R. Ferguson]

Hi (again) Ryan:

All answers are eligible for points (0-10). Please read:

http://forums11.itrc.hp.com/service/forums/helptips.do?#34

Regards!

...JRF...

[Ryan Bernard]

I try the below and it works~! thanks~!

tusc command
sleep 5
kill -QUIT %1