core/fs/readdir.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <sys/dirent.h>
   4 #include "fs.h"
   5 #include "core.h"
   6
   7 /*
   8  * Open a directory
   9  */
  10 DIR *opendir(const char *path)
  11 {
  12     int rv;
  13     struct file *file;
  14
  15     rv = searchdir(path);
  16     if (rv < 0)
  17         return NULL;
  18
  19     file = handle_to_file(rv);
  20
  21     if (file->inode->mode != DT_DIR) {
  22         _close_file(file);
  23         return NULL;
  24     }
  25
  26     return (DIR *)file;
  27 }
  28
  29 /*
  30  * Read one directory entry at one time.
  31  */
  32 struct dirent *readdir(DIR *dir)
  33 {
  34     static struct dirent buf;
  35     struct file *dd_dir = (struct file *)dir;
  36     int rv = -1;
  37
  38     if (dd_dir) {
  39         if (dd_dir->fs->fs_ops->readdir) {
  40             rv = dd_dir->fs->fs_ops->readdir(dd_dir, &buf);
  41         }
  42     }
  43
  44     return rv < 0 ? NULL : &buf;
  45 }
  46
  47 /*
  48  * Close a directory
  49  */
  50 int closedir(DIR *dir)
  51 {
  52     struct file *dd_dir = (struct file *)dir;
  53     _close_file(dd_dir);
  54     return 0;
  55 }
  56
  57