pr7

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

void sighup_handler(int signum) {
    FILE *file = fopen("/user/home/prg.log", "a+");
    if (file == NULL) {
        file = fopen("/user/home/prg.log", "w");
        fprintf(file, "1\n");
    } else {
        int num;
        fscanf(file, "%d", &num);
        fclose(file);
        file = fopen("/user/home/prg.log", "w");
        fprintf(file, "%d\n", num + 1);
    }
    fclose(file);
}

void sigusr1_handler(int signum) {
    FILE *file = fopen("/user/home/prg.log", "r");
    if (file != NULL) {
        int num;
        fscanf(file, "%d", &num);
        printf("Current content of prg.log: %d\n", num);
        fclose(file);
    } else {
        printf("File prg.log does not exist\n");
    }
}

void sigterm_handler(int signum) {
    remove("/user/home/prg.log");
    exit(0);
}

int main() {
    signal(SIGHUP, sighup_handler);
    signal(SIGUSR1, sigusr1_handler);
    signal(SIGTERM, sigterm_handler);

    while (1) {
        sleep(1);
    }

    return 0;
}