C语言stat()

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

#define  FILENAME "/usr/"      

void file_stat(char * filename);
void main()
{
  file_stat(FILENAME);
}

void file_stat(char * filename)
{
  struct stat stat_p;      

  stat (filename, &stat_p);
  printf("This will print several tests on your file \n");
  printf("The answer is in boolean \n 0 - No \n 1 - yes\n");

  printf("\tIs it \n\texsits ?\t\t%d \n",S_ISREG(stat_p.st_mode));
  printf("\tDirectory ?     \t%d \n",S_ISDIR(stat_p.st_mode));
  printf("\tCharecter Device  \t%d\n",S_ISCHR(stat_p.st_mode));
  printf("\tblock device?   \t%d\n",S_ISBLK(stat_p.st_mode));
  printf("\tFIFO (named pipe)? \t%d \n",S_ISFIFO(stat_p.st_mode));
  printf("\tsocket?     \t\t%d\n",S_ISSOCK(stat_p.st_mode));
}

S_ISREG(stat_p.st_mode) || S_ISDIR(stat_p.st_mode)