NAME

reboot − reboot system or halt processor

SYNOPSIS

/usr/ucb/cc [ flag ... ] file ...

#include <sys/reboot.h>

int reboot (int howto, /∗ char ∗bootargs ∗/ ...);

DESCRIPTION

reboot() reboots the system.  howto is a mask of options passed to the bootstrap program.  The function interface permits only RB_HALT or RB_AUTOBOOT to be passed to the reboot program; the other flags are used in scripts stored on the console storage media, or used in manual bootstrap procedures.  When none of these options (for instance RB_AUTOBOOT ) is given, the system is rebooted from file /kernel/unix.  An automatic consistency check of the disks is then normally performed. 

The bits of howto that are used are:

RB_HALT the processor is simply halted; no reboot takes place.  RB_HALT should be used with caution. 

RB_ASKNAME
Interpreted by the bootstrap program itself, causing it to inquire as to what file should be booted.  Normally, the system is booted from the file /kernel/unix without asking. 

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 super-user. 

FILES

/kernel/unix system namelist

SEE ALSO

intro(1M), crash(1M), halt(1M), init(1M), reboot(1M), uadmin(2)

NOTES

Any other howto argument causes /kernel/unix to boot. 

Only the super-user may reboot() a machine. 

SunOS 5.1  —  Last change: 5 Jul 1990