CODEWITHSUNDEEP
bashwhile-loopsignals
Byba
Byba

Reputation: 33

Exit from while loop after catching signal

I'm writing a bash script to capture a signal from another program:

trap "echo Signal" SIGUSR1 
while :         
do
        sleep 1 
done
COMMAND 1
COMMAND 2
COMMAND 3
.........

I want to exit from the while loop after catching the signal, in order to launch COMMAND 1,2,3 and so on.

Any suggestions, please?

Upvotes: 1

Views: 1525

Answers (2)

Raman Sailopal
Raman Sailopal

Reputation: 12867

Put your commands in a function and then use the function in your trap:

#!/bin/bash
trap 'trp' SIGUSR1
trp() {
        COMMAND 1
        COMMAND 2
        COMMAND 3
        ......... 
}
while :         
do
    sleep 1        
done

Upvotes: 1

Nahuel Fouilleul
Nahuel Fouilleul

Reputation: 19305

Using a variable

finished=0
trap 'finished=1;echo Signal' SIGUSR1
while ! ((finished))
do
    sleep 5
    echo sleeping
done
echo done

Upvotes: 1

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