busybox/init/reboot.h

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/*
* Definitions related to the reboot() system call,
* shared between init.c and halt.c.
*/
#include <sys/reboot.h>
#ifndef RB_HALT_SYSTEM
# if defined(__linux__)
# define RB_HALT_SYSTEM 0xcdef0123
# define RB_ENABLE_CAD 0x89abcdef
# define RB_DISABLE_CAD 0
# define RB_POWER_OFF 0x4321fedc
# define RB_AUTOBOOT 0x01234567
# elif defined(RB_HALT)
# define RB_HALT_SYSTEM RB_HALT
# endif
#endif
/* Stop system and switch power off if possible. */
#ifndef RB_POWER_OFF
# if defined(RB_POWERDOWN)
# define RB_POWER_OFF RB_POWERDOWN
# elif defined(__linux__)
# define RB_POWER_OFF 0x4321fedc
# else
# warning "poweroff unsupported, using halt as fallback"
# define RB_POWER_OFF RB_HALT_SYSTEM
# endif
#endif