#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>

main() {
	int fd1, fd2, i, n;
	char user[20], cmd[50], linie[10];
	FILE *p;

	fd1 = open("FIFO1", O_WRONLY);
	if(fd1==-1) {
		perror("eroare la deschidere fifo:");
		exit(1);
	}
        fd2 = open("FIFO2", O_RDONLY);
        if(fd2==-1) {
                perror("eroare la deschidere fifo:");
                exit(1);
        }

        i = read(fd2, user, sizeof(user));
        if (i<0) perror("Parinte - err la read:");
        n = -1;
 
        sprintf(cmd, "ps -U %s 2>/dev/null | wc -l", user);
        p = popen(cmd, "r");
        if (p!=NULL) fgets(linie, 10, p);
        n = atoi(linie);
        pclose(p);

        i = write(fd1, &n, sizeof(int));
        if (i<0) perror("Parinte - err la write:");

	close(fd1); close(fd2);
}