src/dirent/readdir.c

   1 #include <dirent.h>
   2 #include <errno.h>
   3 #include <stddef.h>
   4 #include "__dirent.h"
   5 #include "syscall.h"
   6
   7 typedef char dirstream_buf_alignment_check[1-2*(int)(
   8         offsetof(struct __dirstream, buf) % sizeof(off_t))];
   9
  10 struct dirent *readdir(DIR *dir)
  11 {
  12         struct dirent *de;
  13
  14         if (dir->buf_pos >= dir->buf_end) {
  15                 int len = __syscall(SYS_getdents, dir->fd, dir->buf, sizeof dir->buf);
  16                 if (len <= 0) {
  17                         if (len < 0 && len != -ENOENT) errno = -len;
  18                         return 0;
  19                 }
  20                 dir->buf_end = len;
  21                 dir->buf_pos = 0;
  22         }
  23         de = (void *)(dir->buf + dir->buf_pos);
  24         dir->buf_pos += de->d_reclen;
  25         dir->tell = de->d_off;
  26         return de;
  27 }
  28
  29 weak_alias(readdir, readdir64);