usr/src/sys/h/reboot.h

/*      reboot.h        4.1     11/9/80 */

/*
 * Arguments to reboot system call.
 * These are passed to boot program in r11,
 * and on to init.
 */
#define RB_AUTOBOOT     0       /* flags for system auto-booting itself */

#define RB_ASKNAME      1       /* ask for file name to reboot from */
#define RB_SINGLE       2       /* reboot to single user only */
#define RB_NOSYNC       4       /* dont sync before reboot */
#define RB_HALT         8       /* don't reboot, just halt */

#define RB_PANIC        0       /* reboot due to panic */
#define RB_BOOT         1       /* reboot due to boot() */