reboot(2)                                               reboot(2)



     NAME
          reboot - reboot system or halt processor

     SYNOPSIS
          #include <sys/reboot.h>

          int reboot(howto)
          int howto;

     DESCRIPTION
          reboot halts and restarts the processor and reloads the
          operating system from the disk file ``unix'' on the root
          file system of the default boot device.  By default, in-core
          data for mounted file systems is flushed, as in sync(2).
          Only the superuser may reboot a machine.

          howto is a mask of options passed to the operating system.
          One of the following bits must be set in howto:

          RB_AUTOBOOT
               Restart the processor and reload the operating system.

          RB_HALT
               Halt the processor.  No reboot takes place.

          RB_BUSYLOOP
               Hang the processor an infinite loop.

          The following optional behavior may be requested by setting
          these bits in howto:

          RB_NOSYNC
               Do not flush the system buffers to disk.

          RB_KILLALL
               Terminate all running processes before halting the sys-
               tem.

          RB_UNMOUNT
               Unmount all mounted file systems before halting the
               system.

     RETURN VALUES
          If successful, this call never returns.  Otherwise, a -1 is
          returned and an error is returned in the global variable
          errno.

     ERRORS
          The following error condition could occur:

          [EPERM]        The caller is not the superuser.




     April, 1990                                                     1

     reboot(2)                                               reboot(2)



     SEE ALSO
          reboot(1M), shutdown(1M), sync(2).





















































     2                                                     April, 1990