release/src-rt-6.x.4708/linux/linux-2.6.36/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 /* mknod in devpts */
  23 int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty);
  24 /* get tty structure */
  25 struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number);
  26 /* unlink */
  27 void devpts_pty_kill(struct tty_struct *tty);
  28
  29 #else
  30
  31 /* Dummy stubs in the no-pty case */
  32 static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
  33 static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
  34 static inline int devpts_pty_new(struct inode *ptmx_inode,
  35                                 struct tty_struct *tty)
  36 {
  37         return -EINVAL;
  38 }
  39 static inline struct tty_struct *devpts_get_tty(struct inode *pts_inode,
  40                 int number)
  41 {
  42         return NULL;
  43 }
  44 static inline void devpts_pty_kill(struct tty_struct *tty) { }
  45
  46 #endif
  47
  48
  49 #endif /* _LINUX_DEVPTS_FS_H */