#include <sys/types.h>
#include <dirent.h>
#incllude <errno.h>

//Returns 0 for directory, 1 for file, -1 for error in errno
//str is the pathname of the unknown file/directory
int isDirectory(char * str) {
  DIR dir;
  errno = 0;
  dir = opendir(str);
  if (dir != NULL) {
     closedir(dir);
     return 0;
  } else if (errno == ENOTDIR)
     return 1;
  } else return -1;
}

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

int main(int argc, char **argv)
{
     char *filename;
     int result;
     struct stat statinfo;

     if (argc != 2) {
		  fprintf(stderr, "Usage: %s [<file>]\n", argv[0]);
		  return 1;
     }
     filename = argv[1];
     result = lstat(filename, &statinfo);
     if (result < 0) {
		  if (errno == ENOENT) {
			   printf("File %s does not exist\n", filename);
			   return 0;
		  } else {
			   perror(*argv);
			   return 1;
		  }
     }
     printf("File %s exists, and is a ", filename);
     switch (statinfo.st_mode & S_IFMT) {
     case S_IFREG:  printf("regular file.\n"); break;
     case S_IFSOCK: printf("filesystem socket.\n"); break;
     case S_IFLNK:  printf("symbolic link.\n"); break;
     case S_IFBLK:  printf("block device file.\n"); break;
     case S_IFDIR:  printf("directory.\n"); break;
     case S_IFCHR:  printf("character device file.\n"); break;
     case S_IFIFO:  printf("filesystem pipe (fifo) file.\n"); break;
     default:  printf("unknown type of file.\n"); break;
     }
     return 0;
}