lab5_OS_working version

#include <sys/types.h>
#include <sys/dir.h>
#include<stdio.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
#define MAX_CHARS 200

int CharsRead,Tmp;
struct direct *DirEntryPtr;
DIR *DirPtr;
struct stat Stat;
char Path[MAX_CHARS];

void printInFile(char *buff, char *file)
{
  int fis = open(file,O_CREAT | O_APPEND | O_WRONLY);
  if(fis == -1)
    {
      printf("Error on file open!\n");
      exit(1);
    }
  write(fis, buff, strlen(buff));

  close(fis);
}

int function(const char* dirName)
{
  int size = 0;
  DirPtr = opendir(dirName);
  char buff[100];
  char buff2[100];

  while ((DirEntryPtr = readdir(DirPtr)) != NULL)
    {
      if ((strcmp(DirEntryPtr->d_name,".") != 0) || (strcmp(DirEntryPtr->d_name,"..") != 0))
	{
	     printf("%s \n",DirEntryPtr->d_name);

	     Path[0] = 0;
	     strcat(Path,dirName);
	     strcat(Path,"/");
	     strcat(Path,DirEntryPtr->d_name);
             Tmp = stat(Path,&Stat);

	     int n;
	     int m;

             if (S_ISDIR(Stat.st_mode))
	       {
		 n = sprintf(buff, "Dimensiunea directorului :                %lld bytes\n",(long long) Stat.st_size);
		 printInFile(buff, "output.txt");
	       }

	     if(S_ISREG(Stat.st_mode))
	       {
		 m = sprintf(buff2, "Dimensiunea fisierului :               %lld bytes\n",(long long) Stat.st_size);
		 printInFile(buff2, "output.txt");
	       }
	}
   }

   return size;

}

int main(int argc, char *argv[])
{
  function(argv[1]);

  return 0;
}