linux/include/linux/devpts_fs.h
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   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 */
  23int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty);
  24/* get tty structure */
  25struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number);
  26/* unlink */
  27void devpts_pty_kill(struct tty_struct *tty);
  28
  29#else
  30
  31/* Dummy stubs in the no-pty case */
  32static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
  33static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
  34static inline int devpts_pty_new(struct inode *ptmx_inode,
  35                                struct tty_struct *tty)
  36{
  37        return -EINVAL;
  38}
  39static inline struct tty_struct *devpts_get_tty(struct inode *pts_inode,
  40                int number)
  41{
  42        return NULL;
  43}
  44static inline void devpts_pty_kill(struct tty_struct *tty) { }
  45
  46#endif
  47
  48
  49#endif /* _LINUX_DEVPTS_FS_H */
  50
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