1.\" 2.\" SPDX-License-Identifier: BSD-2-Clause 3.\" 4.\" Copyright (c) 2023 Johannes Totz 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.Dd May 9, 2023 28.Dt EFIWAKE 8 29.Os 30.Sh NAME 31.Nm efiwake 32.Nd manipulate the EFI wake timer 33.Sh SYNOPSIS 34.Nm 35.Nm 36.Fl d 37.Nm 38.Fl e Ar yyyy-mm-ddThh:mm:ss 39.Sh DESCRIPTION 40.Nm 41reports the current value of, disables or enables the EFI wake timer that can 42wake your machine from S3 sleep at a given time. 43.Pp 44If invoked without arguments, the current EFI time and the current value of the 45wake timer will be printed, followed by an 46.Em enabled 47status and a 48.Em pending 49status. 50EFI time is supposed to be in UTC. 51Note that it can be out of sync with kernel time. 52The pending status tells whether the wake timer fired recently; it is cleared 53upon reading. 54.Pp 55If invoked with the 56.Sy -d 57option, the wake timer is reset and disabled. 58.Pp 59If invoked with the 60.Sy -e 61option, the wake timer is set to the given time and date. 62If the date or time is invalid, an error is returned. 63.Pp 64The current EFI time is always printed. 65.Sh EXAMPLES 66Without arguments: 67.Bd -literal -offset indent 68# efiwake 69Current EFI time: 2023-05-04T15:30:45 70EFI wake time: 2023-05-04T10:00:00; enabled=0, pending=1 71.Ed 72.Pp 73Disabling and resetting the wake timer: 74.Bd -literal -offset indent 75# efiwake -d 76Current EFI time: 2023-05-04T15:32:16 77EFI wake time: 2023-05-04T15:32:16; enabled=0, pending=0 78.Ed 79.Pp 80Enabling the wake timer with a valid date: 81.Bd -literal -offset indent 82# efiwake -e 2023-05-04T15:35:00 83Current EFI time: 2023-05-04T15:34:05 84EFI wake time: 2023-05-04T15:35:00; enabled=1, pending=0 85.Ed 86.Pp 87Trying to enable with an invalid date (there is no 31st of April): 88.Bd -literal -offset indent 89# efiwake -e 2023-04-31T15:35:00 90Current EFI time: 2023-05-04T15:35:25 91efiwake: cannot enable EFI wake time: Invalid argument 92.Ed 93.Sh AUTHORS 94.An -nosplit 95The tool and manual page were written by 96.An Johannes Totz Aq Mt jo@bruelltuete.com . 97.Sh BUGS 98The quality of EFI implementations differs widely. 99Corruption of the wake-up date has been observed on real hardware. 100