Signal Handling Question:
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What happnes as the signal SIGINT hits the current process in the program?

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

void response (int);
void response (int sig_no)
{
printf("Linuxn");
}
int main()
{
struct sigaction act;
act.sa_handler = response;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
sigaction(SIGINT,&act,0);
while(1){
printf("googlen");
sleep(1);
}
return 0;
}
a) the process terminates
b) the string "Linux" prints
c) the string "Linux" prints and then process terminates
d) none of the mentioned

Answer:

b) the string "Linux" prints
Output:
[root@localhost sigaction]# gcc -o san san.c
[root@localhost sigaction]# ./san
google
google
google
^CLinux
google
google
^CLinux
google
^Z
[7]+ Stopped ./san
[root@localhost google]#

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Previous QuestionNext Question
Which of the following signal cannot be handled or ignored?
a) SIGINT
b) SIGCHLD
c) SIGKILL
d) SIGALRM		This program will print:

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

void response (int);
void response (int sig_no)
{
printf("%s is workingn",sys_siglist[sig_no]);
}
int main()
{
alarm(5);
sleep(50);
printf("googlen");
signal(SIGALRM,response);
return 0;
}
a) "google"
b) "Alarm clock"
c) nothing
d) none of the mentioned