reboot man page on MirBSD

Man page or keyword search:  
man Server   6113 pages
apropos Keyword Search (all sections)
Output format
MirBSD logo
[printable version]

REBOOT(2)		   BSD Programmer's Manual		     REBOOT(2)

NAME
     reboot - reboot system or halt processor

SYNOPSIS
     #include <unistd.h>
     #include <sys/reboot.h>

     int
     reboot(int howto);

DESCRIPTION
     reboot() reboots the system. Only the superuser may reboot a machine on
     demand. However, a reboot is invoked automatically in the event of unre-
     coverable system failures.

     howto is a mask of options; the system call interface allows the follow-
     ing options, defined in the include file <sys/reboot.h>, to be passed to
     the new kernel or the new bootstrap and init programs.

     RB_AUTOBOOT   The default, causing the system to reboot in its usual
		   fashion.

     RB_ASKNAME	   Interpreted by the bootstrap program itself, causing it to
		   prompt on the console as to what file should be booted.
		   Normally, the system is booted from the file "xx(0,0)bsd",
		   where xx is the default disk name, without prompting for
		   the file name.

     RB_DFLTROOT   Use the compiled in root device. Normally, the system uses
		   the device from which it was booted as the root device if
		   possible. (The default behavior is dependent on the ability
		   of the bootstrap program to determine the drive from which
		   it was loaded, which is not possible on all systems.)

     RB_DUMP	   Dump kernel memory before rebooting; see savecore(8) for
		   more information.

     RB_HALT	   The processor is simply halted; no reboot takes place.

     RB_POWERDOWN  If used in conjunction with RB_HALT, and if the system
		   hardware supports the function, the system will be powered
		   off.

     RB_USERREQ	   By default, the system will halt if reboot() is called dur-
		   ing startup (before the system has finished autoconfigura-
		   tion), even if RB_HALT is not specified. This is because
		   panic(9)s during startup will probably just repeat on the
		   next boot. Use of this option implies that the user has re-
		   quested the action specified (for example, using the ddb(4)
		   boot reboot command), so the system will reboot if a halt
		   is not explicitly requested.

     RB_INITNAME   An option allowing the specification of an init program
		   (see init(8)) other than /sbin/init to be run when the sys-
		   tem reboots. This switch is not currently available.

     RB_KDB	   Load the symbol table and enable a built-in debugger in the
		   system. This option will have no useful function if the
		   kernel is not configured for debugging. Several other op-
		   tions have different meaning if combined with this option,
		   although their use may not be possible via the reboot()
		   call. See ddb(4) for more information.

     RB_NOSYNC	   Normally, the disks are sync'd (see sync(8)) before the
		   processor is halted or rebooted. This option may be useful
		   if file system changes have been made manually or if the
		   processor is on fire.

     RB_RDONLY	   Initially mount the root file system read-only. This is
		   currently the default, and this option has been deprecated.

     RB_SINGLE	   Normally, the reboot procedure involves an automatic disk
		   consistency check and then multi-user operations. RB_SINGLE
		   prevents this, booting the system with a single-user shell
		   on the console. RB_SINGLE is actually interpreted by the
		   init(8) program in the newly booted system.

		   When no options are given (i.e., RB_AUTOBOOT is used), the
		   system is rebooted from file ``bsd'' in the root file sys-
		   tem of unit 0 of a disk chosen in a processor specific way.
		   An automatic consistency check of the disks is normally
		   performed (see fsck(8)).

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

ERRORS
     [EPERM]	   The caller is not the superuser.

SEE ALSO
     ddb(4), crash(8), halt(8), init(8), reboot(8), savecore(8), boot(9),
     panic(9)

HISTORY
     The reboot() function call appeared in 4.0BSD.

BUGS
     Not all platforms support all possible arguments. For example,
     RB_POWERDOWN is supported only on the i386, sparc, and mac68k platforms.

MirOS BSD #10-current		 June 4, 1993				     1
[top]

List of man pages available for MirBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net