reboot (8) ( FreeBSD man: Команды системного администрирования )
reboot (8) ( Linux man: Команды системного администрирования )
- reboot system or halt processor
#include <sys/reboot.h> int
reboot (int howto);
reboots the system.
Only the super-user may reboot a machine on demand.
However, a reboot is invoked
automatically in the event of unrecoverable system failures.
is a mask of options; the system call interface allows the following
options, defined in the include file
In sys/reboot.h ,
to be passed
to the new kernel or the new bootstrap and init programs.
The default, causing the system to reboot in its usual fashion.
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
is the default disk name,
without prompting for the file name.
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.)
Dump kernel memory before rebooting; see
for more information.
the processor is simply halted; no reboot takes place.
This option should be used with caution.
After halting, the shutdown code will do what it can to turn
off the power.
This requires hardware support.
An option allowing the specification of an init program (see
to be run when the system reboots.
This switch is not currently available.
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
Several other options have different meaning if combined
with this option, although their use may not be possible
for more information.
Normally, the disks are sync'd (see
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.
Initially mount the root file system read-only.
This is currently the default, and this option has been deprecated.
Normally, the reboot procedure involves an automatic disk consistency
check and then multi-user operations.
prevents this, booting the system with a single-user shell
on the console.
is actually interpreted by the
program in the newly booted system.
When no options are given (i.e.,
is used), the system is
rebooted from file
in the root file system of unit 0
of a disk chosen in a processor specific way.
An automatic consistency check of the disks is normally performed
If successful, this call never returns.
Otherwise, a -1 is returned and an error is returned in the global