lab5_os_mi

/*
http://stackoverflow.com/questions/3138600/correct-use-of-stat-on-c
http://www.electro.fisica.unlp.edu.ar/temas/p5/files.html                      //explicatii directoare
https://www.cs.cf.ac.uk/Dave/C/node20.html#SECTION002000000000000000000        //~directoare
*/

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


long int computeDirectorySize(const char* name){

  DIR* dir = opendir(name);

  long int totalSize = 0;

  struct dirent* currentFile;

  while((currentFile = readdir(dir)) != NULL){

      if(strcmp(currentFile->d_name, "..") == 0 || strcmp(currentFile->d_name, ".") == 0){
	continue;
      }

      struct stat file_status;

      if (stat(currentFile->d_name, &file_status) == 0) {

	  char dirName[30] = "";
	  //strcat(dirName, name);
	  strcat(dirName, "/");
	  strcat(dirName, currentFile->d_name);
	  printf("%s\n", dirName);

	  if (S_ISDIR(file_status.st_mode)){
	      printf("%s is a directory\n", currentFile->d_name);
	      totalSize += computeDirectorySize(dirName);
	  }



	  else if(S_ISREG(file_status.st_mode)){
	      printf("%s is a normal file\n", currentFile->d_name);
	      //printf("%d \n", file_status.st_size);
	      totalSize += file_status.st_size;
	  }

	  else{
	    continue;
	  }
      }
      else { /* stat() call failed and returned '-1'. */
	  perror("stat call failed");
      }
  }

  closedir(dir);

  return totalSize;
}


int main(int argc, char *argv[])
{
	if(argc == 1)
	{
		fprintf(stderr, "Please give one or more directory names! %d\r\n", argc);
		return 1;
	}

	int i;
	for(i=1; i<argc; i++){
	  long int totalSize = computeDirectorySize(argv[i]);
	  printf("Dimensiunea totala a directorului %s este : %d bytes.\n\n", argv[i], totalSize);
	}

	return 0;
}