NAME

reboot − reboot system or halt processor

SYNOPSIS

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

#include <sys/reboot.h>

reboot(howto, [ bootargs ] )
int howto;
char ∗bootargs;

DESCRIPTION

reboot reboots the system, and is invoked automatically in the event of unrecoverable system failures.  howto is a mask of options passed to the bootstrap program.  The system call 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 /stand/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 /stand/unix without asking. 

RETURN VALUE

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

/vmunix

SEE ALSO

halt(1M) init(1M) reboot(1M)

intro(1M), crash(1M). 

NOTES

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

Only the super-user may reboot a machine. 

  —  BSD Compatibility Package