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
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
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.
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