6.6.2. Handling Signals

Try these first

1. 1.

   What does the SIGINT signal signify?

   Hint

   Think about common user actions within terminal applications.

2. 2.

   What function can be used to register a signal handler?

   Hint

   Recall the name that deals with signals.

3. 3.

   What is the purpose of a signal in Linux?

   • To communicate with hardware
   • To notify processes of events
   • To handle memory allocation

   Hint

   Focus on how the kernel interacts with processes.

4. 4.

   True or False: A signal can directly terminate a process without any registered handler.

   • True
   • False

   Hint

   Consider what happens without specific instructions from the process.

5. 5.

   Create a C program that uses sigaction() to set up a signal handler for SIGQUIT. What should happen when SIGQUIT is received?

   Hint

   Think about how to structure the program to include signal setup.

6. 6.

   Discuss what issues might arise from using the signal() function versus sigaction(). Which is recommended for modern applications?

   Hint

   Consider how portability and reliability affect signal handling.