include/linux/devpts_fs.h

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