include/uapi/linux/reboot.h

Magic values required for the reboot system call

#define	LINUX_REBOOT_MAGIC1	0xfee1dead
#define	LINUX_REBOOT_MAGIC2	672274793
#define	LINUX_REBOOT_MAGIC2A	85072278
#define	LINUX_REBOOT_MAGIC2B	369367448
#define	LINUX_REBOOT_MAGIC2C	537993216

When calling the reboot sys call, the first parameter must be set to LINUX_REBOOT_MAGIC1 and the second parameter to one of other values.

The hexadecimal representation of the LINUX_REBOOT2… macros are 0x28121969, 0x05121996, 0x16041998, 0x20112000 and correspond to the birthdays of Linus Torvalds and his three daughters.

Commands accepted by the reboot system call

`#define LINUX_REBOOT_CMD_RESTART`	`0x01234567`	Restart system using default command and mode.
`#define LINUX_REBOOT_CMD_HALT`	`0xCDEF0123`	Stop OS and give system control to ROM monitor, if any.
`#define LINUX_REBOOT_CMD_CAD_ON`	`0x89ABCDEF`	Ctrl-Alt-Del sequence causes RESTART command.
`#define LINUX_REBOOT_CMD_CAD_OFF`	`0x00000000`	Ctrl-Alt-Del sequence sends SIGINT to init task.
`#define LINUX_REBOOT_CMD_POWER_OFF`	`0x4321FEDC`	Stop OS and remove all power from system, if possible.
`#define LINUX_REBOOT_CMD_RESTART2`	`0xA1B2C3D4`	Restart system using given command string.
`#define LINUX_REBOOT_CMD_SW_SUSPEND`	`0xD000FCE2`	Suspend system using software suspend if compiled in.
`#define LINUX_REBOOT_CMD_KEXEC`	`0x45584543`	Restart system using a previously loaded Linux kernel