overriding SIGINT

xface66 · 04-01-2007, 12:12 PM

Hello everyone,
i am writing a program uses shared memory with semaphores and i use fork() mechanism for child process.
My program will run until the user hits ctrl+C.
But when it is hit, i must stop the child process, detach and deallocate the shared memory and then exit. How can i achieve this?

i tried signal and defined a handler function but i cannot pass any other necessary arguments to it. It takes only one int signum. Do u have any suggestions?

Thanks in advance.

Mara · 04-01-2007, 01:30 PM

Create another shared memory area and keep all the data you need in that area, so you can get access to it. Or you can use global variables.

xface66 · 04-01-2007, 02:14 PM

if i create another shared memory the same problem occurs again.

I don't want to use global variable. Do u have another suggestions?

nmh+linuxquestions.o · 04-02-2007, 01:32 PM

Are you asking how to deal with getting the signal and then doing something?

Are you asking how to clean up the shared memory?

Or are you asking how to do both of these?