Signal Handling Interview Question:

Which one of the following is not true about this program?

#include<stdio.h>
#include<signal.h>

void response (int);
void response (int signo)
{
printf("%sn",sys_siglist[signo]);
signal(SIGSEGV,SIG_IGN);
}
int main()
{
signal (SIGSEGV,response);
char *str;
*str = 10;
return 0;
}
a) kernel sends SIGSEGV signal to a process as segmentation fault occurs
b) in this process signal handler will execute only one time of recieving the signal SIGSEGV
c) both (a) and (b)
d) none of the mentioned

Submitted by: Murtaza

d) none of the mentioned
Explanation:
In this process the segmentation fault occurs because the memory is not allocated to the pointer *str.
Output:
[root@localhost google]# gcc -o san san.c
[root@localhost google]# ./san
Segmentation fault
Segmentation fault (core dumped)
[root@localhost google]#
Submitted by: Murtaza