Topics

• Signals
• Signal Handler Safe
• Signal Disposition
• Signal States
• Pending Signals when Forking/Exec
• Signal Disposition when Forking/Exec
• Raising Signals in C
• Raising Signals in a multithreaded program

Questions

• What is a signal?
• How are signals served under UNIX? (Bonus: How about Windows?)
• What does it mean that a function is signal handler safe
• What is a process Signal Disposition?
• How do I change the signal disposition in a single threaded program? How about multithreaded?
• Why sigaction vs signal?
• How do I asynchronously and synchronously catch a signal?
• What happens to pending signals after I fork? Exec?
• What happens to my signal disposition after I fork? Exec?