lab4 so

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>

int main(int argc, char *argv[]){
  if(argc != 3)
    printf("Usage file dir");
  int a;
  int b;
  char buff[20];

  a = open(argv[1], O_RDONLY, S_IWUSR | S_IRUSR);

  size_t nbytes;
  nbytes = sizeof(buff);
  if(read(a, buff, nbytes) == -1)
    printf("***eroare****");

  char dir[20];
  strcpy(dir,argv[2]);
  strcat(dir,"/");
  strcat(dir,argv[1]);
  b = open(dir, O_WRONLY | O_CREAT | O_TRUNC, S_IWUSR | S_IRUSR);

  mkdir(dir, S_IRUSR | S_IWUSR | S_IXUSR);
  int ibuff;
  char wrbuff[20];
  int i=0,j=0;
  while(i<sizeof(buff)){
    if(isdigit(buff[i])){
      ibuff=buff[i]-'0';
      if(ibuff % 2 == 0){
    wrbuff[j]=buff[i];
    j++;
      }
    }
    i++;
  }
  i=0;
  while(wrbuff[i])
    i++;
  printf("%s",wrbuff);
  if(write(b, wrbuff, 3) == -1)
    printf("***eroare***");
}