reboot(2)							System Calls Manual							 reboot(2)

NAME

       reboot - Reboots system or halts processor

SYNOPSIS

       #include <sys/reboot.h>
       void reboot(	 int howto );

PARAMETERS

       Specifies a mask of options.

DESCRIPTION

       The reboot() function restarts the system.  The startup is automatic and brings up /vmunix in the normal, nonmaintenance mode.  The calling
       process must have superuser privilege to run this function successfully.  However, a reboot is invoked automatically in the event of  unre-
       coverable system failures.

       The  following options, defined in the sys/reboot.h include file are passed to the new kernel or the new bootstrap and init programs.  They
       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 the savecore command for more information.  The processor is simply halted; no reboot takes place.  The disks are not sync'd
       before the processor is halted or rebooted.  Normally, the disks are sync'd (see the sync() command) before  the  processor  is	halted	or
       rebooted.  Because the disks are not sync'd with the RB_NOSYNC option, loss of data may result from using it.

       When  no options are given (that is, RB_AUTOBOOT is used), the system is rebooted from file vmunix in the root file system of unit 0 (zero)
       of a disk chosen in a processor-specific way.  (see the fsck command).

RETURN VALUES

       If successful, this call does not return.  Otherwise, a -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.

RELATED INFORMATION

       Commands: crashdc(8),

       halt(8), init(8), reboot(8), savecore(8) delim off

																	 reboot(2)