1/* -*- linux-c -*- --------------------------------------------------------- * 2 * 3 * linux/include/linux/devpts_fs.h 4 * 5 * Copyright 1998 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/* 14 * Prototypes for the pty driver <-> devpts filesystem interface. Most 15 * of this is really just a hack so we can exclude it or build it as a 16 * module, and probably should go away eventually. 17 */ 18 19#ifndef _LINUX_DEVPTS_FS_H 20#define _LINUX_DEVPTS_FS_H 1 21 22#include <linux/config.h> 23#include <linux/kdev_t.h> 24#include <linux/tty.h> 25 26#ifdef CONFIG_DEVPTS_FS 27 28void devpts_pty_new(int, kdev_t); 29void devpts_pty_kill(int); 30#define unix98_max_ptys NR_PTYS * UNIX98_NR_MAJORS; 31 32#elif defined(CONFIG_DEVPTS_FS_MODULE) 33 34#ifdef BUILDING_PTY_C 35void (*devpts_upcall_new)(int,kdev_t) = NULL; 36void (*devpts_upcall_kill)(int) = NULL; 37unsigned int unix98_max_ptys = NR_PTYS * UNIX98_NR_MAJORS; 38 39EXPORT_SYMBOL(devpts_upcall_new); 40EXPORT_SYMBOL(devpts_upcall_kill); 41EXPORT_SYMBOL(unix98_max_ptys); 42#else 43extern void (*devpts_upcall_new)(int,kdev_t); 44extern void (*devpts_upcall_kill)(int); 45extern unsigned int unix98_max_ptys; 46#endif 47 48#ifndef BUILDING_DEVPTS 49static inline void 50devpts_pty_new(int line, kdev_t device) 51{ 52 if ( devpts_upcall_new ) 53 return devpts_upcall_new(line,device); 54} 55 56static inline void 57devpts_pty_kill(int line) 58{ 59 if ( devpts_upcall_kill ) 60 return devpts_upcall_kill(line); 61} 62#endif 63 64#else /* No /dev/pts filesystem at all */ 65 66static inline void 67devpts_pty_new(int line, kdev_t device) { } 68 69static inline void 70devpts_pty_kill(int line) { } 71 72#endif 73 74#endif /* _LINUX_DEVPTS_FS_H */ 75