#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include "../lpi.h"

static int sigCnt[NSIG];
static volatile sig_atomic_t gotSigint = 0;

static void
handler(int sig)
{
    if (sig == SIGINT)
        gotSigint = 1;
    else
        sigCnt[sig]++;
}

int
main(int argc, char *argv[])
{
    int n, numSecs;
    sigset_t pendingMask, blockingMask, emptyMask;

    printf("%s: PID is %ld\n", argv[0], (long) getpid());

    for (n = 1; n < NSIG; n++)
        (void) signal(n, handler);      /* Ignore errors */

    if (argc > 1) {
        if ((errno = toInt(argv[1], &numSecs)) != 0)
            err(EXIT_FAILURE, "toInt('%s')", argv[1]);

        sigfillset(&blockingMask);
        if (sigprocmask(SIG_SETMASK, &blockingMask, NULL) == -1)
            err(EXIT_FAILURE, "sigprocmask");

        printf("%s: sleeping for %d seconds\n", argv[0], numSecs);
        sleep(numSecs);

        if (sigpending(&pendingMask) == -1)
            err(EXIT_FAILURE, "sigpending");

        printf("%s: pending signals are: \n", argv[0]);
        printSigset(stdout, "\t\t", &pendingMask);

        sigemptyset(&emptyMask);
        if (sigprocmask(SIG_SETMASK, &emptyMask, NULL) == -1)
            err(EXIT_FAILURE, "sigprocmask");
    }

    while (!gotSigint)
        continue;

    for (n = 1; n < NSIG; n++)
        if (sigCnt[n] != 0)
            printf("%s: signal %d caught %d time%s\n", argv[0], n,
                    sigCnt[n], (sigCnt[n] == 1) ? "" : "s");

    exit(EXIT_SUCCESS);
}