Give more explicit name to PID variables

[TD_IML.git] / TD1 / part_one / exo.c

#include <sys/types.h>
#include <sys/wait.h>

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

void show_proc_pids() {
    pid_t current_pid = getpid();
    pid_t parent_pid = getppid();

    printf("[%d] Mon PID: %d\n", current_pid, current_pid);
    printf("[%d] PID du parent: %d\n", current_pid, parent_pid);
}

int main() {
    int status = 0;
    printf("Courant:\n");
    show_proc_pids();

    pid_t cpid = fork();

    if (cpid == -1) {
        printf("Erreur de clonage\n");
        exit(EXIT_FAILURE);
    } else if (cpid == 0) {
        printf("Fils:\n");
        show_proc_pids();
        exit(EXIT_FAILURE);
    } else {
        printf("Parent:\n");
        show_proc_pids();
        pid_t wpid = wait(&status);
        printf("Fin du PID: %d\n", wpid);
        system("ps aux");
        if (WIFEXITED(status)) {
            printf("Fils termine, status=%d\n", WEXITSTATUS(status));
        } else if (WIFSIGNALED(status)) {
            printf("Fils tue par un signal %d\n", WTERMSIG(status));
        } else if (WIFSTOPPED(status)) {
            printf("Fils stoppe par un signal %d\n", WSTOPSIG(status));
        } else if (WIFCONTINUED(status)) {
            printf("Fils continue\n");
        }
    }
    
    return EXIT_SUCCESS;
}