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

int main(void)
{
 struct stat infos;

 if(fstat(STDIN_FILENO,&infos)!=-1)
 {
  if(S_ISBLK(infos.st_mode))       fprintf(stderr,"BLOCK DEVICE\n");
  else if(S_ISCHR(infos.st_mode))  fprintf(stderr,"CHARACTER DEVICE\n");
  else if(S_ISDIR(infos.st_mode))  fprintf(stderr,"DIRECTORY\n");
  else if(S_ISFIFO(infos.st_mode)) fprintf(stderr,"FIFO\n");
  else if(S_ISLNK(infos.st_mode))  fprintf(stderr,"SYMBOLIC LINK\n");
  else if(S_ISREG(infos.st_mode))  fprintf(stderr,"REGULAR FILE\n");
  else if(S_ISSOCK(infos.st_mode)) fprintf(stderr,"SOCKET\n");
  else fprintf(stderr,"???\n");
 }
 else fprintf(stderr,"???\n");

 return(0);
}