| /* -*- linux-c -*- --------------------------------------------------------- * |
| * |
| * linux/include/linux/devpts_fs.h |
| * |
| * Copyright 1998 H. Peter Anvin -- All Rights Reserved |
| * |
| * This file is part of the Linux kernel and is made available under |
| * the terms of the GNU General Public License, version 2, or at your |
| * option, any later version, incorporated herein by reference. |
| * |
| * ------------------------------------------------------------------------- */ |
| |
| /* |
| * Prototypes for the pty driver <-> devpts filesystem interface. Most |
| * of this is really just a hack so we can exclude it or build it as a |
| * module, and probably should go away eventually. |
| */ |
| |
| #ifndef _LINUX_DEVPTS_FS_H |
| #define _LINUX_DEVPTS_FS_H 1 |
| |
| #include <linux/config.h> |
| #include <linux/kdev_t.h> |
| #include <linux/tty.h> |
| |
| #ifdef CONFIG_DEVPTS_FS |
| |
| void devpts_pty_new(int, kdev_t); |
| void devpts_pty_kill(int); |
| #define unix98_max_ptys NR_PTYS * UNIX98_NR_MAJORS; |
| |
| #elif defined(CONFIG_DEVPTS_FS_MODULE) |
| |
| #ifdef BUILDING_PTY_C |
| void (*devpts_upcall_new)(int,kdev_t) = NULL; |
| void (*devpts_upcall_kill)(int) = NULL; |
| unsigned int unix98_max_ptys = NR_PTYS * UNIX98_NR_MAJORS; |
| |
| EXPORT_SYMBOL(devpts_upcall_new); |
| EXPORT_SYMBOL(devpts_upcall_kill); |
| EXPORT_SYMBOL(unix98_max_ptys); |
| #else |
| extern void (*devpts_upcall_new)(int,kdev_t); |
| extern void (*devpts_upcall_kill)(int); |
| extern unsigned int unix98_max_ptys; |
| #endif |
| |
| #ifndef BUILDING_DEVPTS |
| static inline void |
| devpts_pty_new(int line, kdev_t device) |
| { |
| if ( devpts_upcall_new ) |
| return devpts_upcall_new(line,device); |
| } |
| |
| static inline void |
| devpts_pty_kill(int line) |
| { |
| if ( devpts_upcall_kill ) |
| return devpts_upcall_kill(line); |
| } |
| #endif |
| |
| #else /* No /dev/pts filesystem at all */ |
| |
| static inline void |
| devpts_pty_new(int line, kdev_t device) { } |
| |
| static inline void |
| devpts_pty_kill(int line) { } |
| |
| #endif |
| |
| #endif /* _LINUX_DEVPTS_FS_H */ |