LXR linux/include/linux/devpts

   1/* -*- linux-c -*- --------------------------------------------------------- *
   2 *
   3 * linux/include/linux/devpts_fs.h
   4 *
   5 *  Copyright 1998-2004 H. Peter Anvin -- All Rights Reserved
   6 *
   7 * This file is part of the Linux kernel and is made available under
   8 * the terms of the GNU General Public License, version 2, or at your
   9 * option, any later version, incorporated herein by reference.
  10 *
  11 * ------------------------------------------------------------------------- */
  12
  13#ifndef _LINUX_DEVPTS_FS_H
  14#define _LINUX_DEVPTS_FS_H
  15
  16#include <linux/errno.h>
  17
  18#ifdef CONFIG_UNIX98_PTYS
  19
  20int devpts_new_index(struct inode *ptmx_inode);
  21void devpts_kill_index(struct inode *ptmx_inode, int idx);
  22/* mknod in devpts */
  23struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
  24                void *priv);
  25/* get private structure */
  26void *devpts_get_priv(struct inode *pts_inode);
  27/* unlink */
  28void devpts_pty_kill(struct inode *inode);
  29
  30#else
  31
  32/* Dummy stubs in the no-pty case */
  33static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
  34static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
  35static inline struct inode *devpts_pty_new(struct inode *ptmx_inode,
  36                dev_t device, int index, void *priv)
  37{
  38        return ERR_PTR(-EINVAL);
  39}
  40static inline void *devpts_get_priv(struct inode *pts_inode)
  41{
  42        return NULL;
  43}
  44static inline void devpts_pty_kill(struct inode *inode) { }
  45
  46#endif
  47
  48
  49#endif /* _LINUX_DEVPTS_FS_H */
  50