Date: Mon, 06 Apr 2015 14:35:30 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-acpi@freebsd.org Cc: freebsd-bugs@freebsd.org, Sibananda Sahu <sibananda.sahu@avagotech.com> Subject: Re: How to know the system state if the system is going for halt or poweroff or reboot in FreeBSD Message-ID: <3069256.iCnUzzNb56@ralph.baldwin.cx> In-Reply-To: <cbf5dcad395190fc8f9716bbc68b4ec1@mail.gmail.com> References: <cbf5dcad395190fc8f9716bbc68b4ec1@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thursday, March 26, 2015 01:54:45 AM Sibananda Sahu wrote:
> My requirement is to know the exact reason of shutdown, whether is it a
> power-off or a reboot call.
>
> And I can get the information from the “howto” variable that is passed to
> the kern_reboot() function call, but this variable is local to
> kern_reboot() only.
It is passed to the shutdown_* eventhandlers. So if you register an eventhandler
you can get the howto argument that way. ACPI uses this to power off the machine
for a power off request for example:
static void
acpi_shutdown_final(void *arg, int howto)
{
...
if ((howto & RB_POWEROFF) != 0) {
status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
}
--
John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3069256.iCnUzzNb56>