fs/dir.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <malloc.h>
   4 #include <fs.h>
   5 #include <dirent.h>
   6 #include <err.h>
   7
   8 /* for relative path searching */
   9 DIR *this_dir;
  10
  11 DIR *opendir(const char *path)
  12 {
  13         struct inode *inode;
  14         DIR *dir;
  15
  16         inode = namei(path, 0);
  17         if (IS_ERR_OR_NULL(inode))
  18                 return inode ? ERR_CAST(inode) : ERR_PTR(-ENOENT);
  19
  20         dir = malloc(sizeof(*dir));
  21         if (!dir)
  22                 return ERR_PTR(-ENOMEM);
  23         dir->dd_dir = malloc(sizeof(struct file));
  24         if (!dir->dd_dir) {
  25                 free(dir);
  26                 return ERR_PTR(-ENOMEM);
  27         }
  28         dir->dd_dir->inode  = inode;
  29         dir->dd_dir->fs     = inode->i_fs;
  30         dir->dd_dir->offset = 0;
  31         dir->dd_dir->f_op   = inode->i_fop;
  32
  33         return dir;
  34 }