reboot man page on DigitalUNIX

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reboot(2)							     reboot(2)

NAME
       reboot - Reboot or halt the system

SYNOPSIS
       #include <sys/reboot.h>

       int reboot(
	       int howto );

PARAMETERS
       Specifies a mask of options.

DESCRIPTION
       The reboot() function restarts the system. The default startup is auto‐
       matic and brings up /vmunix in the normal, nonmaintenance mode.	In  an
       application,  the  calling process must have superuser privilege to use
       this function.  However, a reboot is invoked automatically in the event
       of unrecoverable system failures.

       The  following flags, defined in the <sys/reboot.h> header file, may be
       passed to the kernel bootstrap process by applications. These flags are
       supplied	 as  values  to the howto parameter.  The default, causing the
       system to reboot in its	usual  fashion.	  Dump	kernel	memory	before
       rebooting; see savecore(8) for more information.	 The processor is sim‐
       ply halted; no reboot takes place.  The disks are  not  sync'ed	before
       the  processor  is halted or rebooted.  Normally, the disks are sync'ed
       before the processor is halted or rebooted. See sync(8) for more infor‐
       mation.

					  Caution

	      Because the disks are not sync'ed when you specify the RB_NOSYNC
	      option, loss of data may result from using it.

       If no flags are specified (equivalent to RB_AUTOBOOT),  the  system  is
       rebooted from file vmunix in the root file system.

       RB_*  flags  that are defined in the <sys/reboot.h> header file and not
       listed in this reference page are reserved for internal use only.

RETURN VALUES
       If successful, this call does not return.  Otherwise,  -1  is  returned
       and errno is set to indicate the error.

ERRORS
       If  the	reboot()  function  fails,  errno  may be set to the following
       value: The calling process does not have appropriate privilege.

SEE ALSO
       Commands: crashdc(8), halt(8), reboot(8), savecore(8), sync(8)

       Functions: sync(2)

								     reboot(2)
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