(2006-08-06) rescue-bootcd

extra/linux-2.6.10/include/linux/sysrq.h

@@ -0,0 +1,48 @@
+/* -*- 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;
+
+struct sysrq_key_op {
+	void (*handler)(int, struct pt_regs *, struct tty_struct *);
+	char *help_msg;
+	char *action_msg;
+};
+
+#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 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