child process and parent process
Posted: Fri Jul 29, 2016 8:51 pm
Below is the code to send signals form parent process to child process. I want to send signals from child process to parent process in this code.
can someone help me for this.
can someone help me for this.
Code: Select all
//sig_talk.c
#include <stdio.h>
#include <signal.h>
/* routines child will call upon sigtrap */
void sigint();
void sigquit();
main()
{ int pid;
/* get child process */
if ((pid = fork()) < 0) {
perror("fork");
exit(1);
}
if (pid == 0)
{ /* child */
signal(SIGINT,sigint);
signal(SIGQUIT, sigquit);
for(;;); /* loop for ever */
}
else /* parent */
{ /* pid hold id of child */
printf("\nPARENT: sending SIGINT\n\n");
kill(pid,SIGINT);
sleep(3); /* pause for 3 secs */
printf("\nPARENT: sending SIGQUIT\n\n");
kill(pid,SIGQUIT);
sleep(3);
}
}
void sigint()
{ signal(SIGINT,sigint); /* reset signal */
printf("CHILD: I have received a SIGINT\n");
}
void sigquit()
{ printf("My DADDY has Killed me!!!\n");
exit(0);
}