[Nut-upsuser] Is newhidups driver still in memory just before o/s halt ?

[Marc Rechté]

Hello Charles,

Thanks for your feedback.

This is Red Hat EL 4.

You seem to be right about the mounted filesystem. This is the last 
lines of halt script:

# Try all file systems other than root and RAM disks, one last time.
mount |  awk '!/( \/ |^\/dev\/root|^\/dev\/ram| \/proc )/ { print $3 }' | \
   while read line; do
     umount -f $line
done

# Remount read only anything that's left mounted.
# echo $"Remounting remaining filesystems readonly"
mount | awk '{ print $3 }' | while read line; do
     mount -n -o ro,remount $line
done

# Now halt or reboot.
echo $"$message"
if [ -f /fastboot ]; then
  echo $"On the next boot fsck will be skipped."
elif [ -f /forcefsck ]; then
  echo $"On the next boot fsck will be forced."
fi

if [ "$command" = /sbin/halt -a -r /etc/ups/upsmon.conf -a -f 
/etc/killpower -a -f /etc/sysconfig/ups ] ; then
	. /etc/sysconfig/ups
	if [ "$SERVER" = "yes" -a "$MODEL" = "upsdrvctl" ] ; then
		/sbin/upsdrvctl shutdown
	elif [ "$SERVER" = "yes" -a "$MODEL" != "NONE" -a -n "$MODEL" -a -n 
"$DEVICE" ] ; then
		$MODEL $OPTIONS_HALT -k $DEVICE
	fi
fi

if [ -x /sbin/halt.local ]; then
    /sbin/halt.local
fi

HALTARGS="-i -d"
[ -f /poweroff -o ! -f /halt ] && HALTARGS="$HALTARGS -p"

exec $command $HALTARGS


Of course I will not touch this script, but there is a possibility to 
write one's own /sbin/halt.local script. Is not it too late to use the 
usb driver ?

Marc.

> The stack is still available, but the USB filesystem (/proc/bus/usb or
> /dev/bus/usb) might have been unmounted. It is generally safe to
> remount it, since it does not map to persistent storage.
>
> Which RedHat version/distro are you working with?
>