Exercice prog-sys TD4

pere-fils-ack.c

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <string.h>

// pour tuer le processus faire killall -9 <nom du process>

struct sigaction father_sig, son_sig, old;
int receive = 0;
pid_t pid;

void father(int sig) {
    printf("reception du signal : %d : %s\n", sig, strsignal(sig));
    //receive = 1;
    kill(pid, SIGUSR1);
}

void son(int sig) {
    receive = 1;
}

int main(int argc, char const *argv[]) {
    father_sig.sa_flags = 0;
    sigemptyset(&father_sig.sa_mask);
    father_sig.sa_handler = son;

    son_sig.sa_flags = 0;
    sigemptyset(&son_sig.sa_mask);
    son_sig.sa_handler = father;

    for ( int i = 1; i < NSIG; i++ ) {
        sigaction(i, &son_sig, &old);
    }
    sigaction(SIGUSR1, &father_sig, &old);
    
    pid = fork();
    pid_t ppid = getppid();

    if ( pid == 0 ) { // fils
        for ( int i = 0; i < atoi(argv[1]); i++) {
            for ( int j = 2; argv[j] != '\0'; j++ ) {
                receive = 0;
                printf("Envoi du signal : %d\n", atoi(argv[j]));
                kill(ppid, atoi(argv[j]));
                while( ! receive );
            }
        }
        kill(ppid, SIGTERM);
        exit(EXIT_SUCCESS);
    }
    while(1);
    //wait(NULL);
    //pause();
    return EXIT_SUCCESS;
}

pere-fils-ack2.c

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <string.h>

// pour tuer le processus faire killall -9 <nom du process>

struct sigaction father_sig, son_sig, old;
int receive = 0;
pid_t pid;

void father(int sig) {
    if ( sig == SIGTERM ) {
        printf("Reception du siganl SIGTERM, arrêt\n");
        exit(EXIT_SUCCESS);
    }
    printf("reception du signal : %d : %s\n", sig, strsignal(sig));
    //receive = 1;
    kill(pid, SIGUSR1);
}

void son(int sig) {
    receive = 1;
}

int main(int argc, char const *argv[]) {
    if ( argc < 2 ) {
        fprintf(stderr, "Usage %s <nb> <sig> <sig> ...\n", argv[0]);
        exit(EXIT_FAILURE);
    }
    // init de la structure father_sig
    father_sig.sa_flags = 0;
    sigemptyset(&father_sig.sa_mask);
    father_sig.sa_handler = son;

    // init de la structure son_sig
    son_sig.sa_flags = 0;
    sigemptyset(&son_sig.sa_mask);
    son_sig.sa_handler = father;

    // création des masques (question 4.4)
    sigset_t m, empty;
    sigemptyset(&m);
    sigemptyset(&empty);

    sigaddset(&m, SIGUSR1);

    // On rattrape tout les signaux
    for ( int i = 1; i < NSIG; i++ ) {
        sigaction(i, &son_sig, &old);
    }
    // On configure le signal SIGUSR1 
    sigaction(SIGUSR1, &father_sig, &old);
    
    pid = fork();
    pid_t ppid = getppid();

    if ( pid == 0 ) { // fils
        sigprocmask(SIG_BLOCK, &m, NULL);
        for ( int i = 0; i < atoi(argv[1]); i++) {
            for ( int j = 2; argv[j] != NULL; j++ ) {
                receive = 0;
                printf("Envoi du signal : %d\n", atoi(argv[j]));
                kill(ppid, atoi(argv[j]));
                sigsuspend(&empty);
                //while( !receive );
            }
        }
        kill(ppid, SIGTERM);
        exit(EXIT_SUCCESS);
    }
    while(1);
    //wait(NULL);
    //pause();
    return EXIT_SUCCESS;
}

Merci bro

Merci bro

De rien frérot