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NAME    [Toc]    [Back]

     boot - halt or reboot the system

SYNOPSIS    [Toc]    [Back]

     #include <sys/reboot.h>

     boot(int howto);

DESCRIPTION    [Toc]    [Back]

     The boot() 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, boot() does
the following:

           1.   Sets the boothowto system variable from the howto

           2.   If this is the first invocation of boot() and the
                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,  boot()
runs any shutdown
  hooks by calling doshutdownhooks(9), prints a message,
and halts the
     system (unless RB_USERREQ is specified, in  which  case  the
system will be
     halted  if RB_HALT is given, and rebooted otherwise; see reboot(2) for
     more details).

SEE ALSO    [Toc]    [Back]

     reboot(2), doshutdownhooks(9), resettodr(9), vfs_shutdown(9)

OpenBSD      3.6                        November     13,     1995
[ Back ]
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