table of contents
| nvram-wakeup(8) | NVRAM WakeUp | nvram-wakeup(8) |
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.nvram-wakeup --iwname bio_m6vcg
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.
nvram-wakeup -s $((`date +%s` + 20 *
60))
nvram-wakeup -s `date +%s -d
"18:30"`
nvram-wakeup -s `date +%s -d "Apr 23
18:30"`
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.netCOPYRIGHT¶
Copyright © 2001-2004 Sergei Haller.| May 08 2004 | Linux |