If we use the trap command inside a function in the script, then the reassigned signal behavior will become global inside a script. We can check this effect in the following script example.
Let's write shell script trap_01.sh as follows:
#!/bin/bash trap "echo caught signal SIGINT" SIGINT trap "echo caught signal SIGQUIT" 3 trap "echo caught signal SIGTERM" 15 while : do sleep 50 done
Let's test the program as follows:
$ chmod +x trap_01.sh $ ./trap_01.sh
Output:
^Ccaught signal SIGINT ^Quit (core dumped) caught signal SIGQUIT
Let's write one more trap_02.sh shell script as follows:
#!/bin/bash trap "echo caught signal SIGINT" SIGINT trap "echo caught signal SIGQUIT" 3 trap "echo caught signal SIGTERM" 15 trap "echo caught signal...