readdir.c raw

   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);
  30