This patch is some sort of  'Quick Hack', it does NOT tested well. Take care for applying. And USB Signaling is NOT supported yet.

After applying this patch, apcupsd darmon accept new option ( -s / --sleep ) and using instead of killpower ( -k / --killpower ),  initiate '@nnn' command to your UPS.

# ./apcupsd --help

usage: apcupsd [options]

  Options are as follows:

  -b,                           don't go into background

  -d, --debug <level>           set debug level (>0)

  -f, --config-file <file>      load specified config file

  -k, --killpower, --hibernate  put UPS into hibernation mode [*]

  -o, --power-off               turn off UPS completely [*]

  -P, --pid-file                specify name of PID file

  -p, --kill-on-powerfail       hibernate UPS on powerfail

  -R,                           put SmartUPS into dumb mode

  -s, --sleep <minutes>         put UPS into hibernation mode and

                                awake after <minutes> minutes[*]

  -t, --term-on-powerfail       terminate when battery power fails

  -T                            send debug to ./apcupsd.trace

  -V, --version                 display version info

  -h, --help                    display this help

  [*] Only one parameter of this kind and apcupsd must not already be running.

Copyright (C) 2004-2009 Adam Kropelin

Copyright (C) 1999-2005 Kern Sibbald

Copyright (C) 1996-1999 Andre Hedrick

Copyright (C) 1999-2001 Riccardo Facchetti

apcupsd is free software and comes with ABSOLUTELY NO WARRANTY

under the terms of the GNU General Public License

Report bugs to apcupsd Support Center:

  apcupsd-users@lists.sourceforge.net

'@nnn' means 'delayed wakeup of nnn tenths of an hour', then argument of sleep ( -s / --sleep ) translate as follow;

( -s / --sleep ) argument	'@nnn' Command
0	Not Accepted
1 - 6	@001
7 - 12	@002
...	...
5989 - 5994	@999
5995 -	Not Accepted

For usual operation, it will be useful adding last of rc0 ( or similler ) script such as below;

if [ -f /path/to/sleep_minutes -a -x /path/to/apcupsd ] ; then

        SLEEP_MINUTES=`cat /path/to/sleep_minutes`

        echo

        echo "APCUPSD make UPS asleep ${SLEEP_MINUTES} minutes..."

        echo

        /path/to/apcupsd --sleep ${SLEEP_MINUTES}

        rm -f /path/to/sleep_minutes

fi

$ gzip -dc apcupsd-3.18.tar.gz | tar xf -

$ cd apc-upsd-3.18 ; gzip -dc /path/to/apcupsd-3.14.18-smsleep_01.patch.gz | patch -p 1 

configure , make , make install etc...

Hiroshi Chonan - chonan at pid0 dot org

This patch follows original Apcupsd's license policy. In other words, licensed under the GPL version 2.