zad2 syg

//------------------------------------------PISARZ-----------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>

int main() {
    pid_t pid=fork();
    if(pid == 0) {
        system("gcc -o czytelnik zad1_czytelnik.c");
        execl("czytelnik", NULL);
    }
    else {
        sleep(1);
        char buf[100];
        int output = open("bufor", O_WRONLY | O_CREAT, 0777);
        FILE *input = fopen("/etc/passwd", "r");
        while(fgets(buf, 100, input)) {
            write(output, buf, 100);
            memset(buf,0,100);
            kill(pid, SIGUSR1);
            usleep(1000);
            lseek(output, 0L, 0);
        }
        close(output);
        fclose(input);
        remove("bufor");
        kill(pid, SIGUSR2);
    }
    return 0;
}

//------------------------------------------CZYTELNIK-----------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
int line=1;

void signal_handler() {
    int input=open("bufor", O_RDONLY);
    char buf[100];
    printf("%d ", line);
    line++;
    read(input, buf, 100);
    printf("%s", buf);
    fflush(stdout);
    close(input);
}

void end_work(){
    exit(0);
}

int main() {
    signal(SIGUSR1, signal_handler);
    signal(SIGUSR2, end_work);
    for(;;);
}