apm(8) - NetBSD Manual Pages

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APM(8)                  NetBSD System Manager's Manual                  APM(8)


NAME

     apm, zzz -- Advanced Power Management control program


SYNOPSIS

     apm [-abdlmsSvz] [-f sockname]
     zzz [-Sz] [-f sockname]


DESCRIPTION

     apm communicates with the Advanced Power Management daemon, apmd(8), mak-
     ing requests of it for current power status or to place the system into a
     suspend or stand-by state.  The apm tool is only installed on supported
     platforms.

     With no flags, apm displays the current power management state in verbose
     form.

     Available command-line flags are:
     -z      Put the system into suspend (deep sleep) mode.
     -S      Put the system into stand-by (light sleep) mode.
     -l      Display the estimated battery lifetime in percent.
     -m      Display the estimated battery lifetime in minutes.
     -b      Display the battery status.  0 means high, 1 means low, 2 means
             critical, 3 means charging, 4 means absent, and 255 means
             unknown.
     -a      Display the external charger (A/C status).  0 means disconnected,
             1 means connected, 2 means backup power source, and 255 means
             unknown.
     -s      Display if power management is enabled.
     -v      Request more verbose description of the displayed states.
     -f sockname
             Set the name of the socket via which to contact apmd(8) to
             sockname.
     -d      Do not communicate with the APM daemon; attempt instead to manip-
             ulate the APM control device directly.

     The zzz variant of this command is an alternative for suspending the sys-
     tem.  With no arguments, zzz places the system into suspend mode.  The
     command line flags serve the same purpose as for the apm variant of this
     command.

     This command does not wait for positive confirmation that the requested
     mode has been entered; to do so would mean the command does not return
     until the system resumes from its sleep state.


FILES

     /var/run/apmdev is the default UNIX-domain socket used for communication
     with apmd(8).  The -f flag may be used to specify an alternate socket
     name.  The protection modes on this socket govern which users may access
     the APM functions.

     /dev/apmctl is the control device which is used when the -d flag is spec-
     ified; it must be writable for the -d flag to work successfully.
     /dev/apm is the status device used when the socket is not accessible; it
     must be readable to provide current APM status.


SEE ALSO

     apm(4), apmd(8)


REFERENCES

     Advanced Power Management (APM) BIOS Interface Specification (revision
     1.1), Intel Corporation and Microsoft Corporation


HISTORY

     The apm command appeared in NetBSD 1.3.

NetBSD 5.1                       June 18, 1996                      NetBSD 5.1