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);
22void devpts_add_ref(struct inode *ptmx_inode);
23void devpts_del_ref(struct inode *ptmx_inode);
24/* mknod in devpts */
25struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
26		void *priv);
27/* get private structure */
28void *devpts_get_priv(struct inode *pts_inode);
29/* unlink */
30void devpts_pty_kill(struct inode *inode);
31
32#else
33
34/* Dummy stubs in the no-pty case */
35static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
36static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
37static inline void devpts_add_ref(struct inode *ptmx_inode) { }
38static inline void devpts_del_ref(struct inode *ptmx_inode) { }
39static inline struct inode *devpts_pty_new(struct inode *ptmx_inode,
40		dev_t device, int index, void *priv)
41{
42	return ERR_PTR(-EINVAL);
43}
44static inline void *devpts_get_priv(struct inode *pts_inode)
45{
46	return NULL;
47}
48static inline void devpts_pty_kill(struct inode *inode) { }
49
50#endif
51
52
53#endif /* _LINUX_DEVPTS_FS_H */
54