| APM(8) | System Manager's Manual | APM(8) | 
apm, zzz —
| apm | [ -abdlmSsvz] [-fsockname] | 
| zzz | [ -Sz] [-fsockname] | 
apm program communicates with the Advanced Power
  Management (APM) daemon, apmd(8),
  making requests of the current power status or placing the system either into
  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:
-a-b-d-f
    sockname-l-m-S-s-v-zThe zzz variant of this command is an
    alternative for suspending the system. 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.
-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 specified; 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.
Intel Corporation and Microsoft Corporation, Advanced Power Management (APM) BIOS Interface Specification, Revision 1.2, February 1996.
apm command appeared in NetBSD
  1.3.
The APM specification first appeared in 1992. The last update to
    the standard was made in 1996 - the same year when it was superceded by the
    ACPI 1.0 standard. Thereafter power management on IBM-compatible personal
    computers has relied on ACPI, implemented in NetBSD
    by the acpi(4) subsystem. The
    acpi(4) provides an emulation
    layer for the legacy apm.
| March 20, 2010 | NetBSD 9.4 |