diff options
Diffstat (limited to 'include/linux/sysrq.h')
| -rw-r--r-- | include/linux/sysrq.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h new file mode 100644 index 000000000000..ea819b89c235 --- /dev/null +++ b/include/linux/sysrq.h @@ -0,0 +1,60 @@ +/* -*- 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 + */ + +#include <linux/config.h> + +struct pt_regs; +struct tty_struct; + +/* 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, struct pt_regs *, struct tty_struct *); + char *help_msg; + char *action_msg; + int enable_mask; +}; + +#ifdef CONFIG_MAGIC_SYSRQ + +/* 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, struct pt_regs *, struct tty_struct *); +void __handle_sysrq(int, struct pt_regs *, struct tty_struct *, int check_mask); +int register_sysrq_key(int, struct sysrq_key_op *); +int unregister_sysrq_key(int, struct sysrq_key_op *); +struct sysrq_key_op *__sysrq_get_key_op(int key); + +#else + +static inline int __reterr(void) +{ + return -EINVAL; +} + +#define register_sysrq_key(ig,nore) __reterr() +#define unregister_sysrq_key(ig,nore) __reterr() + +#endif |