include/linux/devpts_fs.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* -*- linux-c -*- --------------------------------------------------------- *
   3  *
   4  * linux/include/linux/devpts_fs.h
   5  *
   6  *  Copyright 1998-2004 H. Peter Anvin -- All Rights Reserved
   7  *
   8  * ------------------------------------------------------------------------- */
   9
  10 #ifndef _LINUX_DEVPTS_FS_H
  11 #define _LINUX_DEVPTS_FS_H
  12
  13 #include <linux/errno.h>
  14
  15 #ifdef CONFIG_UNIX98_PTYS
  16
  17 struct pts_fs_info;
  18
  19 struct vfsmount *devpts_mntget(struct file *, struct pts_fs_info *);
  20 struct pts_fs_info *devpts_acquire(struct file *);
  21 void devpts_release(struct pts_fs_info *);
  22
  23 int devpts_new_index(struct pts_fs_info *);
  24 void devpts_kill_index(struct pts_fs_info *, int);
  25
  26 /* mknod in devpts */
  27 struct dentry *devpts_pty_new(struct pts_fs_info *, int, void *);
  28 /* get private structure */
  29 void *devpts_get_priv(struct dentry *);
  30 /* unlink */
  31 void devpts_pty_kill(struct dentry *);
  32
  33 /* in pty.c */
  34 int ptm_open_peer(struct file *master, struct tty_struct *tty, int flags);
  35
  36 #else
  37 static inline int
  38 ptm_open_peer(struct file *master, struct tty_struct *tty, int flags)
  39 {
  40         return -EIO;
  41 }
  42 #endif
  43
  44
  45 #endif /* _LINUX_DEVPTS_FS_H */