/* -*- linux-c -*- * * $Id: sysrq.h,v 1.3 1997/07/17 11:54:33 mj Exp $ * * Linux Magic System Request Key Hacks * * (c) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz> * * (c) 2000 Crutcher Dunnavant <crutcher+kernel@datastacks.com> * overhauled to use key registration * based upon discusions in irc://irc.openprojects.net/#kernelnewbies */ #ifndef _LINUX_SYSRQ_H #define _LINUX_SYSRQ_H #include <linux/errno.h> #include <linux/types.h> /* Possible values of bitmask for enabling sysrq functions */ /* 0x0001 is reserved for enable everything */ #define SYSRQ_ENABLE_LOG 0x0002 #define SYSRQ_ENABLE_KEYBOARD 0x0004 #define SYSRQ_ENABLE_DUMP 0x0008 #define SYSRQ_ENABLE_SYNC 0x0010 #define SYSRQ_ENABLE_REMOUNT 0x0020 #define SYSRQ_ENABLE_SIGNAL 0x0040 #define SYSRQ_ENABLE_BOOT 0x0080 #define SYSRQ_ENABLE_RTNICE 0x0100 struct sysrq_key_op { void (*handler)(int); char *help_msg; char *action_msg; int enable_mask; }; #ifdef [31mCONFIG_MAGIC_SYSRQ[0m /* Generic SysRq interface -- you may call it from any device driver, supplying * ASCII code of the key, pointer to registers and kbd/tty structs (if they * are available -- else NULL's). */ void handle_sysrq(int key); void __handle_sysrq(int key, bool check_mask); int register_sysrq_key(int key, struct sysrq_key_op *op); int unregister_sysrq_key(int key, struct sysrq_key_op *op); struct sysrq_key_op *__sysrq_get_key_op(int key); int sysrq_toggle_support(int enable_mask); #else static inline void handle_sysrq(int key) { } static inline void __handle_sysrq(int key, bool check_mask) { } static inline int register_sysrq_key(int key, struct sysrq_key_op *op) { return -EINVAL; } static inline int unregister_sysrq_key(int key, struct sysrq_key_op *op) { return -EINVAL; } #endif #endif /* _LINUX_SYSRQ_H */ |