1. Write a program that blocks and then ignores the signal SIGINT in 7 steps as follows 1) Set up the handler for the signal SIGINT Use signal) to set up a handler for SIGINT The handler function should print out signal number and description about the signal: use the passed argument for the signal number and strsignal) for description 2) Block SIGINT for 10 seconds Use sigprocmask() to block SIGINT and * Use sleep() to keep 10 seconds Try Control-C (it generates a signal SIGINT) to see the pending signals include SIGINT at the next step (the handler should not be called). 3) Show pending signals Use sigpending) and printSigset) * Pending signals will be shown 4) Ignore SIGENT Use SIG IGN option for signal) 5) Show pending signals again Use sigpending) and printSigset *Nothing will be shown 6) Set up the handler for SIGINT again * Use signal) 7) Unblock SIGINT * Use sigprocmask) * Use sleep() to keep for 10 seconds The handler function should be working printing out "T caught signal 2 (Ieterrupt) when you type in Control C The functions introduced in each step are required to be used for this homewerk You can also use other related functions covered in the lecture notes. Your program should print out a statement indicating each step, for example S /homework4 Step 1) Setting up Step 2) Blocking (10 seconds) CStep 3) Pending signals are 2 (Interrupt) Step 4) Ignoring Step 5) Pending signals are Step 6) Setting up again Step 7) Unblocking al caught signal 2 (Interrupt) 1. Write a program that blocks and then ignores the signal SIGINT in 7 steps as follows 1) Set up the handler for the signal SIGINT Use signal) to set up a handler for SIGINT The handler function should print out signal number and description about the signal: use the passed argument for the signal number and strsignal) for description 2) Block SIGINT for 10 seconds Use sigprocmask() to block SIGINT and * Use sleep() to keep 10 seconds Try Control-C (it generates a signal SIGINT) to see the pending signals include SIGINT at the next step (the handler should not be called). 3) Show pending signals Use sigpending) and printSigset) * Pending signals will be shown 4) Ignore SIGENT Use SIG IGN option for signal) 5) Show pending signals again Use sigpending) and printSigset *Nothing will be shown 6) Set up the handler for SIGINT again * Use signal) 7) Unblock SIGINT * Use sigprocmask) * Use sleep() to keep for 10 seconds The handler function should be working printing out "T caught signal 2 (Ieterrupt) when you type in Control C The functions introduced in each step are required to be used for this homewerk You can also use other related functions covered in the lecture notes. Your program should print out a statement indicating each step, for example S /homework4 Step 1) Setting up Step 2) Blocking (10 seconds) CStep 3) Pending signals are 2 (Interrupt) Step 4) Ignoring Step 5) Pending signals are Step 6) Setting up again Step 7) Unblocking al caught signal 2 (Interrupt)
