NAME
nvram-wakeup - a (small) program that can read and write the WakeUp
time in the BIOS.
SYNOPSIS
nvram-wakeup [-l|--syslog] [-D|--debug] [-A|--directisa] [-N|--nowrite]
[-d|--disable] [-s|--settime time] [-C|--configfile filename]
[-I|--iwname string] [-v|--version] [-h|--help]
DESCRIPTION
nvram-wakeup is a (small) program that can read and write the WakeUp
time in the BIOS (via /dev/nvram on kernels >= 2.4.6 or using direct
I/O). On this WakeUp time the computer will be powered on
automatically from the soft-off state.
OPTIONS
If run without options, nvram-wakeup will read the current wakeup
settings from the NVRAM and print them on stdout.
-l, --syslog
This option will let nvram-wakeup log all output via syslogd to
the system log instead of stdout/stderr. This option should
always be the first one.
-D, --debug
This option enables printing debug messages.
-A, --directisa
Use direct I/O port access to access the nvram instead of
/dev/nvram. This option must be used if the configuration
option upper_method is set. The device /dev/rtc is still used.
WARNING: If you use the option --directisa and some other
programm tries to access nvram and/or rtc at the same time, you
might screw up all your nvram (i.e. all CMOS settings).
-N, --nowrite
This option disables writing into the nvram and rtc devices. But
all the values for the bytes are calculated. Write them down and
go set the same date/time via BIOS Setup, run nvram-wakeup and
see if the values you written down correspond to the values
set by the BIOS.
-s time, --settime=time
Specify the time on which the computer should be up and running.
The time is specified as a time_t value, i.e., number of seconds
since epoch (Jan 1 1970, 00:00:00).
See EXAMPLES below on how to set a "human readable" wakeup time.
Set time to 0 to disable the wakeup feature.
You can specify multiple -s|--settime options on the command
line, as far as they all have the same time value. See EXAMPLES
below.
-d, --disable
A synonym for --settime=0
-C filename, --configfile=filename
Read mainboard configuration from configuration file filename.
See nvram-wakeup.conf(5) for information on the syntax of the
file.
See BOARD CONFIGURATION below for general information on getting
board configurations.
-I name, --iwname=name
If the DMI entries of your mainboard are broken, you may specify
a DMI infowriter name here. (it’s the name of one of the
functions from nvram-wakeup-mb.c)
If you specify --configfile as well as the --iwname option, then
--iwname is ignored.
See BOARD CONFIGURATION below for general information on getting
board configurations.
-w minutes, --wakeupbefore=minutes
Specify how many minutes before the programmed wakeuptime the
computer should wake up.
The default is to start 5 minutes before the programmed wakeup
time.
-h, --help
Print a help message and exit.
-v, --version
Display version and author information.
BOARD CONFIGURATION
By default, the mainboard is autodetected by reading DMI information
from the BIOS. If the DMI entries are broken, you can specify the name
of the infowriter to be used with the --iwname option. This only works
if the board configuration is aleready compiled into the program. The
list of existing infowriters can be found in the source.
Example: On my Biostar M6VCG the whole DMI entry is broken (maybe a
BIOS update would help, but I never tried it), but the configuration of
the board is known, so only the autodetection doesn’t work. Thus look
up (in boards.yaml) the name of the infowriter to beused, which is
’bio_m6vcg’ and call
nvram-wakeup --iwname bio_m6vcg
If nvram-wakeup doesn’t know anything about your board, you can put the
board configuration into a file and pass the file name via the
--configfile option to nvram-wakeup. Look nvram-wakeup.conf(5) for
more information on the configuration file syntax.
If you specify --configfile as well as the --iwname option, then
--iwname is ignored.
EXAMPLES
You can specify multiple -d or -s options at the command line, but
they must specify the same time, e.g.
nvram-wakeup --settime=0 -s0 -s 0 -d -ddds0 # is O.K.
nvram-wakeup -s1002722247 -s1002722247 # is O.K.
nvram-wakeup -s1002722247 -s1002722248 # is not O.K.
nvram-wakeup -s1002722247 --disable # is not O.K.
If you want the machine to be up and running in 20 minutes, call
nvram-wakeup -s $((‘date +%s‘ + 20 * 60))
If you want the machine to be up and running at 18:30 today, call
nvram-wakeup -s ‘date +%s -d "18:30"‘
Note that this is really "today" so if you run this after 18:30, the
time will be in the past.
If you want the machine to be up and running on a particular day, at a
particular time, say at 18:30 on Apr. 23rd, call
nvram-wakeup -s ‘date +%s -d "Apr 23 18:30"‘
For "tomorrow" you can use something like that:
nvram-wakeup -s $((‘date +%s -d "18:30"‘ + 60*60*24))
EXIT STATUS
0 Successful program execution. The new date and time were set
successfully.
1 Successful program execution. The computer must be rebooted for
the changes to take effect.
2 An error occured. Something went wrong.
FILES
/dev/nvram
NVRAM character device. This one is used for reading/writing the
nvram values if the command line option --directisa is not used.
/dev/rtc
RTC character device. This one is used to determine if the RTC
clock is running localtime or UTC/GMT. Furthermore, some
motherboards use the RTC alarm time for the wakeup feature.
/dev/mem
Memory character device. This one is used to get DMI information
for board autodetection.
nvram-wakeup.conf
Configuration file for a mainboard not supported out-of-the-box.
See nvram-wakeup.conf(5) for information on the syntax of the
file.
SEE ALSO
nvram-wakeup.conf(5)
HOMEPAGE
http://sf.net/projects/nvram-wakeup/
AUTHOR
Written by Sergei Haller <Sergei.Haller@math.uni-giessen.de>.
REPORTING BUGS
Report bugs at the bug tracking system (see HOMEPAGE) or on the mailing
list nvram-wakeup-devel@lists.sourceforge.net
COPYRIGHT
Copyright © 2001-2004 Sergei Haller.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA