Description
Assignment no 2(a)
Information: One case (out of three cases explore own-self for the other two, theory will be covered in class) for
handling signal is: a process executes a particular (user) function on receipt of the signal.
Problem: Write a C program by using signal() system call to handle the reception of SIGINT signal by
executing a particular(user) function, which function is responsible for creating a child process by using
fork( ) system call and then you have to display the PROCESS ID and PARENT PROCESS ID from the
parent process as well as from the child process.
/* You need to put proper explanatory comment in your program to demonstrate the purpose and why
you have used the C statements and system calls */
Hints:
* For generating, SIGINT (SIGINT is a keyboard interrupt signal) signal, you have to press Ctrl+C. So, by
default pressing Ctrl+C in a running program leads to the termination of the running process. But, your program
should provide a way to handle the keyboard interrupt through signal() system call by executing user defined
function as mentioned above.
* To know more about, see signal(2) man page (command: “man 2 signal”) and refer W.R. Steven Book,Vol-2.
Assignment no 2(b)
Write a C program which will take the Process ID and signal ID as input to demonstrate the use of kill( )
system call.
/* You need to put proper explanatory comment in your program to demonstrate the purpose and why
you have used the system calls */
Hints:
* For demonstrating so, you modify the assignment 2(a) to handle each and every signal (as much possible as).
Run command “kill –l”, to know about signal type and ID. Now run the modified assignment 2(a).
* Again from another terminal, run the assignment 2(b) which will take the Process ID of the modified
assignment 2(a) and any valid signal value as input.
* Your signal handler function of the modified assignment 2(b) should be able to display the signal ID of the
generated signal.
* To know more about kill( ), see kill(2) man page and for signal type, value, action and comment, see signal(7)
man page and refer to W.R. Steven Book,Vol-2.
Assignment no 2(c)
Write a C program to create a user level thread using system call pthread_create( ) and assign the thread
to display the “HELLO WORLD” . Use pthread_exit() in your program (if possible) for terminating the
thread.
/* You need to put proper explanatory comment in your program to demonstrate the purpose and
why you have used the system calls */
Hints:
* To know more about pthread_create( ), see pthread_create (3) man page and to know more about
pthread_exit( ), see pthread_exit (3).
