Elaborato_SO/src/custom_sig.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>

#include <custom_sig.h>
#include <structures.h>
#include <nonsodovemetterle.h>
#include <errExit.h>
#include <custom_msgq.h>

static int sigint_count = 2;

void setSignal(int sig);

void sigIntHandler2(int sig) {
    kill(getpid(), SIGTERM);
}

void sigHandlerServer(int sig) {
    // if (sig == SIGINT) {     // FIXME: non riesco a farlo funzionare, quando premo ctr+c è come se gli arrivasse al server la mossa di un giocatore 
                                // UPDATE: funzia ma è piu bella la mia sol?
    //     sigint_count--;
    //     if (sigint_count > 0) {
            // printfServer("Press again Ctrl^C to exit ");
            // printf("(whitin %d sec)\n", TIME_TO_RESET);
    //         alarm(TIME_TO_RESET);
    //     } else {
    //         alarm(0);   // toglie l'allarme
    //         sig = SIGTERM;
    //     }
    // }

    // if (sig == SIGALRM) {
    //     printfServer("");
    //     printf("Time to exit (%d sec) expired", TIME_TO_RESET);
    //     sigint_count = 2;
    // }

    if (sig == SIGINT) {
        printfServer("Press again Ctrl^C to exit ");
        printf("(whitin %d sec)\n", TIME_TO_RESET);
        signal(SIGINT, sigIntHandler2);
        alarm(TIME_TO_RESET);
    }

    if (sig == SIGALRM) {
        printfServer("");
        printf("Time to exit (%d sec) expired", TIME_TO_RESET);
        signal(SIGINT, sigHandlerServer);
    }


    if (sig == SIGTERM || sig == SIGHUP) {
        if (pids[0] > 0) {
            printfServer("Terminating player one");
            kill(pids[0], SIGTERM);
        }
        if (pids[1] > 0) {
            printfServer("Terminating player two");
            kill(pids[1], SIGTERM);
        }

        // msgq
        if (_MSGQID) {
            printfServer("Deleting msg");
            if (msgctl(_MSGQID, IPC_RMID, NULL) == -1) {        //TODO: funzione
                errExit("msgctl", "sigHandlerServer");
            }
        }

        // sem
        if (semid) {
            printfServer("Deleting sem");
            if (semctl(semid, 0, IPC_RMID, 0) == -1) {
                errExit("semctl", "sigHandlerServer");
            }
        }

        // shm
        if (board) {
            printfServer("Detathing shm");
            if (shmdt(board) == -1) {
                errExit("shmdt", "sigHandlerServer");
            }
        }
        if (shmid){
            printfServer("Deleting shm");
            if (shmctl(shmid, IPC_RMID, NULL) == -1) {
                errExit("shmctl", "SigHandlerSever");
            }
        }
        printf("\n");

        exit(0);
    }
}

void setServerSignalHandler() {
    sigset_t mySet;
    sigfillset(&mySet);

    sigdelset(&mySet, SIGINT);
    sigdelset(&mySet, SIGTERM);
    sigdelset(&mySet, SIGHUP);
    sigdelset(&mySet, SIGALRM);
    
    sigprocmask(SIG_SETMASK, &mySet, NULL);

    setSignal(SIGINT);
    setSignal(SIGTERM);
    setSignal(SIGHUP);
    setSignal(SIGALRM);
}

void setSignal(int sig) {
    if (signal(sig, sigHandlerServer) == SIG_ERR) {
        errExit("signal", "f4Server");
    }
}