Unable to trap SIGQUIT signal in Unix

Question

Script:

echo $$
trap "echo \"hai\"" 3
while [ 1 ]
do
      ls >/dev/null
done

My requirement is to trap the SIGQUIT signal. So I execute the above script and press (CTRL + D). But it doesn't trap the signal and it didn't print "hai". But it is properly worked if the signal is sent via 'kill -3 '. So, why CTRL+D is not worked?

score 0 · Answer 1 · answered Sep 13 '16 at 09:53

0

I believe that SIGQUIT is Ctrl \
Ctrl D being EOF

answered Sep 13 '16 at 09:53

Rolf of Saxony

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But this page `https://www.tutorialspoint.com/unix/unix-signals-traps.htm` have somemore different. Here they specify CTRL+D produce SIGQUIT signal. – mohangraj Sep 13 '16 at 10:14
Then they are confused. You can check for yourself with `stty -a`. – tripleee Sep 13 '16 at 10:17
I hate to be the bearer of bad news but did you try using Ctrl \ with `your` code? Your code works! :) – Rolf of Saxony Sep 13 '16 at 15:18

Unable to trap SIGQUIT signal in Unix

1 Answers1