Passing ctrl + c in shell scripting

Linux and Unix-Like Linux
1

Hi,

How to pass ctrl + c in shell scripting.

Regards,
shausy

2

Please refer to the many examples on this forum for trapping signals

for eg.

Hope this helps

Another one from the web is

catch Ctrl-C from shell script

3

If you are trying to send a control-C, that's just sending a SIGINT.

kill -s SIGINT <PID>
4

also

trap exit INT
5

Thanks for all your response.

Let me tell my requirement clearly,
I have script which runs some commands followed by
....
tail -f /var/log/messages (only way to end this command by passing ctrl + c)
and again i want to run the commands
.....

So i want to pass ctrl + c inside my script just to complete one command and start executing next command.

I tried with trap and kill its completely kill the script, so the remaining part of my script not executing.

Thanks in advance,
Shausy

6

it seems that the answer to that question might depend on the shell you are using

Apparently if you use csh then you are in luck

10.9 Built-in Shell Commands

Please read above link. My understanding of your issue is limited to about 30 minutes spent on google but heres my attempt for bash shell

#!/bin/bash
# user interrupt trap demo
function int_handler {
  echo "-- Tail interrupted"
RUN SECOND SET OF COMMANDS AFTER TAIL
 exit
}
# Establish interrupt handler
PERFORM TASKS BEFORE TAIL COMMAND
trap int_handler INT
# Do some work...
TAIL COMMAND

---------- Post updated at 02:54 AM ---------- Previous update was at 02:30 AM ----------

I made a slight modification to the code and tried to run it on my solaris system. Please have a look

#!/bin/bash
# user interrupt trap demo
function int_handler {
echo "-- Tail interrupted"
}
# Establish interrupt handler
echo PERFORM TASKS BEFORE TAIL COMMAND
trap int_handler INT
# Do some work...
tail -f /var/log/syslog
echo RUN SECOND SET OF COMMANDS AFTER TAIL
7

Maybe you can have a look at this thread :

give a try to smthg like

doTail() {
while :
do
     trap break INT
     tail -F "${1}"
done
}
doTail /var/log/messages