76 lines
1.4 KiB
C
76 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/wait.h>
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void sighup(); /* routines child will call upon sigtrap */
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void sigint();
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void sigquit();
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int
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main() {
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int pid, p[2], child, cstatus;
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char dummy[1];
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/* get child process */
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if(pipe(p)){
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perror("pipe");
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exit(1);
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}
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if ((pid = fork()) < 0) {
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perror("fork");
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exit(2);
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}
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if (pid == 0) {
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printf("\nI am the new child!\n\n");
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signal(SIGHUP,sighup); /* set function calls */
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signal(SIGINT,sigint);
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signal(SIGQUIT, sigquit);
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printf("\nChild going to loop...\n\n");
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close(p[1]);
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close(p[0]);
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for(;;); /* loop for ever */
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}
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else /* parent */
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{
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close(p[1]);
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read(p[0], &dummy, 1);
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close(p[0]);
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printf("\nPARENT: sending SIGHUP\n\n");
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kill(pid,SIGHUP);
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sleep(3); /* pause for 3 secs */
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printf("\nPARENT: sending SIGINT\n\n");
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kill(pid,SIGINT);
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sleep(3); /* pause for 3 secs */
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printf("\nPARENT: sending SIGQUIT\n\n");
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kill(pid,SIGQUIT);
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child = wait(&cstatus);
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if(child == pid && cstatus == 0)
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exit(0);
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else
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{
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printf("PARENT: child exited with status %d\n", cstatus);
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exit(1);
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}
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}
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}
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void sighup() {
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signal(SIGHUP,sighup); /* reset signal */
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printf("CHILD: I have received a SIGHUP\n");
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}
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void sigint() {
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signal(SIGINT,sigint); /* reset signal */
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printf("CHILD: I have received a SIGINT\n");
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}
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void sigquit() {
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printf("My DADDY has Killed me!!!\n");
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exit(0);
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}
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