NAME
cpu_reboot —
halt or reboot the system
SYNOPSIS
#include
<sys/reboot.h>
void
cpu_reboot(int
howto, char
*bootstr);
DESCRIPTION
Thecpu_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,
cpu_reboot()
does the following:
- Sets the boothowto system variable (see boothowto(9)) from the howto argument.
- If this is the first invocation of
cpu_reboot() and theRB_NOSYNCflag is not set in howto, syncs and unmounts the system disks by calling vfs_shutdown(9) and sets the time of day clock by calling resettodr(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 by calling pmf_system_shutdown(9).
- 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,
cpu_reboot()
runs any shutdown hooks by calling
pmf_system_shutdown(9), prints a message, and halts the
system.
If RB_STRING is set in
howto, then the parameter
bootstr is passed to the system boot loader on some
ports.
SEE ALSO
boothowto(9), dumpsys(9), pmf_system_shutdown(9), resettodr(9), vfs_shutdown(9)