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| KERN_REBOOT(9) | FreeBSD Kernel Developer's Manual | KERN_REBOOT(9) |
NAME
kern_reboot —
SYNOPSIS
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/reboot.h>
void
kern_reboot(int
howto);
#include
<sys/eventhandler.h>
EVENTHANDLER_REGISTER(shutdown_pre_sync,
shutdown_fn,
private,
priority);
EVENTHANDLER_REGISTER(shutdown_post_sync,
shutdown_fn,
private,
priority);
EVENTHANDLER_REGISTER(shutdown_final,
shutdown_fn,
private,
priority);
DESCRIPTION
Thekern_reboot() function handles final system
shutdown, and either halts or reboots the system. The exact action to be taken
is determined by the flags passed in howto and by
whether or not the system has finished autoconfiguration.
If the system has finished autoconfiguration,
kern_reboot() does the following:
- If this is the first invocation of
kern_reboot() and theRB_NOSYNCflag is not set in howto, syncs and unmounts the system disks by calling vfs_unmountall(9). - Disables interrupts.
- If rebooting after a crash (i.e., if
RB_DUMPis set in howto, butRB_HALTis not), saves a system crash dump. - Runs any shutdown hooks previously registered.
- Prints a message indicating that the system is about to be halted or rebooted.
- If
RB_HALTis set in howto, halts the system. Otherwise, reboots the system.
If the system has not finished autoconfiguration,
kern_reboot() runs any shutdown hooks previously
registered, prints a message, and halts the system.
RETURN VALUES
Thekern_reboot() function does not return.
SEE ALSO
reboot(2) EVENTHANDLER(9) vfs_unmountall(9)| Sept 23, 2021 | FreeBSD 13.1-RELEASE |
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