#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>

// server - preia nume director, trimite # bytes

int main() {

	int f, cod, codW, fW;

	cod = mkfifo("citire",0666);
	codW = mkfifo("scirere",0777);
	if(cod<0){
		printf("Eroare la creare fifo \n");
		exit(2);
	}

	f = open("citire",O_RDONLY);
	if(f<0){
		printf("Eroare deschidere fifo server \n");
		exit(1);
	}

	// citirea din pipe
	int i = 0, l;
	char c, buf[100];
	do{
  	//citesc un caracter
  	l=read(f,&c,sizeof(char));
  	//daca e valid il adaug in sir
    	if (l>0){
    		buf[i]=c;
        	i++;
       	}
	}while (l>0);
	buf[i] = 0;
	close(f);

	// contruim comanda shell

	char command[100] = "du -b ";
	strcat(command, buf);

	FILE* file = popen(command, "r");

	i = 0;
	char result[1000];
	while ((c = fgetc(file)) != ' ') { // citim ca din fisier normal, pana la ' '
		result[i++] = c;
	}

	fW = open("scriere",O_WRONLY);
	write(fW,result,strlen(result));


}