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NAME    [Toc]    [Back]

     cpu_reboot - halt or reboot the system

SYNOPSIS    [Toc]    [Back]

     #include <sys/reboot.h>

     cpu_reboot(int howto, char *bootstr);

DESCRIPTION    [Toc]    [Back]

     The cpu_reboot() function handles final system shutdown, and either halts
     or reboots the system.  The exact action to be taken is determined by the
     flags passed in howto and by whether or not the system has finished autoconfiguration.

     If the system has finished autoconfiguration, cpu_reboot() does the following:

           1.   Sets the boothowto system variable from the howto argument.

           2.   If this is the first invocation of cpu_reboot() and the
                RB_NOSYNC flag is not set in howto, syncs and unmounts the
                system disks by calling vfs_shutdown(9) and sets the time of
                day clock by calling resettodr(9).

           3.   Disables interrupts.

           4.   If rebooting after a crash (i.e. if RB_DUMP is set in howto,
                but RB_HALT is not), saves a system crash dump.

           5.   Runs any shutdown hooks by calling doshutdownhooks(9).

           6.   Prints a message indicating that the system is about to be
                halted or rebooted.

           7.   If RB_HALT is set in howto, halts the system.  Otherwise,
                reboots the system.

     If the system has not finished autoconfiguration, cpu_reboot() runs any
     shutdown hooks by calling doshutdownhooks(9), prints a message, and halts
     the system.

     If RB_STRING is set in howto, then the parameter bootstr is passed to the
     system boot loader on some ports.

SEE ALSO    [Toc]    [Back]

     doshutdownhooks(9), resettodr(9)

BSD                            November 13, 1995                           BSD
[ Back ]
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