@@ -123,7 +123,7 @@
Copyright @copyright{} 2023 Thomas Ieong@*
Copyright @copyright{} 2023 Saku Laesvuori@*
Copyright @copyright{} 2023 Graham James Addis@*
-Copyright @copyright{} 2023, 2024 Tomas Volf@*
+Copyright @copyright{} 2023-2025 Tomas Volf@*
Copyright @copyright{} 2024, 2025 Herman Rimm@*
Copyright @copyright{} 2024 Matthew Trzcinski@*
Copyright @copyright{} 2024 Richard Sent@*
@@ -422,7 +422,7 @@ Top
* Network File System:: NFS related services.
* Samba Services:: Samba services.
* Continuous Integration:: Cuirass and Laminar services.
-* Power Management Services:: Extending battery life.
+* Power Management Services:: Extending battery life, etc.
* Audio Services:: The MPD.
* Virtualization Services:: Virtualization services.
* Version Control Services:: Providing remote access to Git repositories.
@@ -19270,7 +19270,7 @@ Services
* Network File System:: NFS related services.
* Samba Services:: Samba services.
* Continuous Integration:: Cuirass and Laminar services.
-* Power Management Services:: Extending battery life.
+* Power Management Services:: Extending battery life, etc.
* Audio Services:: The MPD.
* Virtualization Services:: Virtualization services.
* Version Control Services:: Providing remote access to Git repositories.
@@ -36849,6 +36849,382 @@ Power Management Services
@end table
@end deftp
+The @code{(gnu services power)} module provides a service definition for
+@uref{http://www.apcupsd.org/, apcupsd}, a utility to interact with
+@acronym{APC, APC by Schneider Electric or formerly American Power
+Conversion Corporation} @acronym{UPS, Uninterruptible Power Supply}
+devices. Apcupsd also works with some @acronym{OEM, Original Equipment
+Manufacturer}-branded products manufactured by APC.
+
+@defvar apcupsd-service-type
+The service type for apcupsd. For USB UPSes no configuration is
+necessary, however tweaking some fields to better suit your needs might
+be desirable. The defaults are taken from the upstream configuration
+and they are not very conservative (for example, the default
+@code{battery-level} of 5% may be considered too low by some).
+
+The default event handlers do send emails, read more in
+@ref{apcupsd-event-handlers}.
+
+@lisp
+(service apcupsd-service-type)
+@end lisp
+@end defvar
+
+@deftp {Data Type} apcupsd-configuration
+
+Available @code{apcupsd-configuration} fields are:
+
+@table @asis
+@item @code{apcupsd} (default: @code{apcupsd}) (type: package)
+The @code{apcupsd} package to use.
+
+@item @code{shepherd-service-name} (default: @code{apcupsd}) (type: symbol)
+The name of the shepherd service. You can add the service multiple
+times with different names to manage multiple UPSes.
+
+@item @code{auto-start?} (default: @code{#t}) (type: boolean)
+Should the shepherd service auto-start?
+
+@item @code{pid-file} (default: @code{"/var/run/apcupsd.pid"}) (type: string)
+The file name of the pid file.
+
+@item @code{debug-level} (default: @code{0}) (type: integer)
+The logging verbosity. Bigger number means more logs. The source code
+uses up to @code{300} as debug level value, so a value of @code{999}
+seems reasonable to enable all the logs.
+
+@item @code{run-dir} (default: @code{"/var/run/apcupsd"}) (type: string)
+The directory containing runtime information. You need to change this
+if you desire to run multiple instances of the daemon.
+
+@item @code{name} (type: maybe-string)
+Use this to give your UPS a name in log files and such. This is
+particularly useful if you have multiple UPSes. This does not set the
+EEPROM. It should be 8 characters or less.
+
+@item @code{cable} (default: @code{usb}) (type: enum-cable)
+The type of a cable connecting the UPS to your computer. Possible
+generic choices are @code{'simple}, @code{'smart}, @code{'ether} and
+@code{'usb}.
+
+Alternatively, a specific cable model number may be used:
+@code{'940-0119A}, @code{'940-0127A}, @code{'940-0128A},
+@code{'940-0020B}, @code{'940-0020C}, @code{'940-0023A},
+@code{'940-0024B}, @code{'940-0024C}, @code{'940-1524C},
+@code{'940-0024G}, @code{'940-0095A}, @code{'940-0095B},
+@code{'940-0095C}, @code{'940-0625A}, @code{'M-04-02-2000}.
+
+@item @code{type} (default: @code{usb}) (type: enum-type)
+The type of the UPS you have.
+
+@table @code
+@item apcsmart
+Newer serial character device, appropriate for SmartUPS models using a
+serial cable (not an USB).
+
+@item usb
+Most new UPSes are an USB.
+
+@item net
+Network link to a master apcupsd through apcupsd's Network Information
+Server. This is used if the UPS powering your computer is connected to
+a different computer for monitoring.
+
+@item snmp
+SNMP network link to an SNMP-enabled UPS device.
+
+@item netsnmp
+Same as the SNMP above but requires use of the net-snmp library. Unless
+you have a specific need for this old driver, you should use the
+@code{'snmp} instead.
+
+@item dumb
+An old serial character device for use with simple-signaling UPSes.
+
+@item pcnet
+A PowerChute Network Shutdown protocol which can be used as an
+alternative to an SNMP with the AP9617 family of smart slot cards.
+
+@item modbus
+A serial device for use with newest SmartUPS models supporting the
+MODBUS protocol.
+
+@end table
+
+@item @code{device} (default: @code{""}) (type: string)
+For USB UPSes, usually you want to set this to an empty string (the
+default). For other UPS types, you must specify an appropriate port or
+address.
+
+@table @code
+@item apcsmart
+Set to the appropriate @file{/dev/tty**} device.
+
+@item usb
+A null string setting enables auto-detection, which is the best choice
+for most installations.
+
+@item net
+Set to @code{@var{hostname}:@var{port}}.
+
+@item snmp
+Set to @code{@var{hostname}:@var{port}:@var{vendor}:@var{community}}.
+The @var{hostname} is the ip address or hostname of the UPS on the
+network. The @var{vendor} can be can be "APC" or "APC_NOTRAP".
+"APC_NOTRAP" will disable SNMP trap catching; you usually want "APC".
+The @var{port} is usually 161. The @var{community} is usually
+"private".
+
+@item netsnmp
+Same as the @code{'snmp}.
+
+@item dumb
+Set to the appropriate @file{/dev/tty**} device.
+
+@item pcnet
+Set to @code{@var{ipaddr}:@var{username}:@var{passphrase}:@var{port}}.
+The @var{ipaddr} is the IP address of the UPS management card. The
+@var{username} and the @var{passphrase} are the credentials for which
+the card has been configured. The @var{port} is the port number on
+which to listen for messages from the UPS, normally 3052. If this
+parameter is empty or missing, the default of 3052 will be used.
+
+@item modbus
+Set to the appropriate @file{/dev/tty**} device. You can also leave it
+empty for MODBUS over USB or set to the serial number of the UPS.
+
+@end table
+
+@item @code{poll-time} (default: @code{60}) (type: integer)
+The interval (in seconds) at which apcupsd polls the UPS for status.
+This setting applies both to directly-attached UPSes (apcsmart, usb,
+dumb) and networked UPSes (net, snmp). Lowering this setting will
+improve the apcupsd's responsiveness to certain events at the cost of
+higher CPU utilization.
+
+@item @code{on-batery-delay} (default: @code{6}) (type: integer)
+The time in seconds from when a power failure is detected until we react
+to it with an onbattery event. The @code{'powerout} event will be
+triggered immediately when a power failure is detected. However, the
+@code{'onbattery} event will be trigger only after this delay.
+
+@item @code{battery-level} (default: @code{5}) (type: integer)
+If during a power failure, the remaining battery percentage (as reported
+by the UPS) is below or equal to this value, the apcupsd will initiate a
+system shutdown.
+
+@quotation Note
+@code{battery-level}, @code{remaining-minutes}, and @code{timeout} work
+in a conjunction, so the first that occurs will cause the initation of a
+shutdown.
+@end quotation
+
+@item @code{remaining-minutes} (default: @code{3}) (type: integer)
+If during a power failure, the remaining runtime in minutes (as
+calculated internally by the UPS) is below or equal to this value,
+apcupsd will initiate a system shutdown.
+
+@quotation Note
+@code{battery-level}, @code{remaining-minutes}, and @code{timeout} work
+in a conjunction, so the first that occurs will cause the initation of a
+shutdown.
+@end quotation
+
+@item @code{timeout} (default: @code{0}) (type: integer)
+If during a power failure, the UPS has run on batteries for this many
+seconds or longer, apcupsd will initiate a system shutdown. The value
+of 0 disables this timer.
+
+@quotation Note
+@code{battery-level}, @code{remaining-minutes}, and @code{timeout} work
+in a conjunction, so the first that occurs will cause the initation of a
+shutdown.
+@end quotation
+
+@item @code{annoy-interval} (default: @code{300}) (type: integer)
+The time in seconds between annoying users (via the @code{'annoyme}
+event) to sign off prior to system shutdown. 0 disables.
+
+@item @code{annoy-delay} (default: @code{60}) (type: integer)
+The initial delay in seconds after a power failure before warning users
+to get off the system.
+
+@item @code{no-logon} (default: @code{disable}) (type: enum-no-logon)
+The condition which determines when users are prevented from logging in
+during a power failure.
+
+@item @code{kill-delay} (default: @code{0}) (type: integer)
+If this is non-zero, the apcupsd will continue running after a shutdown
+has been requested, and after the specified time in seconds attempt to
+kill the power. This is for use on systems where apcupsd cannot regain
+control after a shutdown.
+
+@item @code{net-server} (default: @code{#f}) (type: boolean)
+If enabled, a network information server process will be started.
+
+@item @code{net-server-ip} (default: @code{"127.0.0.1"}) (type: string)
+An IP address on which the NIS server will listen for incoming
+connections.
+
+@item @code{net-server-port} (default: @code{3551}) (type: integer)
+An IP port on which the NIS server will listen for incoming connections.
+
+@item @code{net-server-events-file} (type: maybe-string)
+If you want the last few EVENTS to be available over the network by the
+network information server, you must set this to a file name.
+
+@item @code{net-server-events-file-max-size} (default: @code{10}) (type: integer)
+The maximum size of the events file in kilobytes.
+
+@item @code{class} (default: @code{standalone}) (type: enum-class)
+Normally standalone unless you share an UPS using an APC ShareUPS card.
+
+@item @code{mode} (default: @code{disable}) (type: enum-mode)
+Normally disable unless you share an UPS using an APC ShareUPS card.
+
+@item @code{stat-time} (default: @code{0}) (type: integer)
+The time interval in seconds between writing the status file, 0
+disables.
+
+@item @code{log-stats} (default: @code{#f}) (type: boolean)
+Also write the stats as a logs. This generates a lot of output.
+
+@item @code{data-time} (default: @code{0}) (type: integer)
+The time interval in seconds between writing the data records to the log
+file, 0 disables.
+
+@item @code{facility} (type: maybe-string)
+The logging facility for the syslog.
+
+@item @code{event-handlers} (type: apcupsd-event-handlers)
+Handlers for events produced by apcupsd.
+
+@end table
+@end deftp
+
+@anchor{apcupsd-event-handlers}
+@deftp {Data Type} apcupsd-event-handlers
+
+For a description of the events please refer to @samp{man 8 apccontrol}.
+
+Each handler shall be a gexp. It is spliced into the control script for
+the daemon. In addition to the standard Guile programming environment,
+the following procedures and variables are also available:
+
+@table @code
+@item conf
+Variable containing the file name of the configuration file.
+
+@item powerfail-file
+Variable containing the file name of the powerfail file.
+
+@item cmd
+The event currently being handled.
+
+@item name
+The name of the UPS as specified in the configuration file.
+
+@item connected?
+Is @code{#t} if @command{apcupsd} is connected to the UPS via a serial
+port (or a USB port). In most configurations, this will be the case.
+In the case of a Slave machine where apcupsd is not directly connected
+to the UPS, this value will be @code{#f}.
+
+@item powered?
+Is @code{#t} if the computer on which @command{apcupsd} is running is
+powered by the UPS and @code{#f} if not. At the moment, this value is
+unimplemented and always @code{#f}.
+
+@item (err @var{fmt} @var{args...})
+Wrapper around @code{format} outputting to @code{(current-error-port)}.
+
+@item (wall @var{fmt} @var{args...})
+Wrapper around @code{format} outputting via @command{wall}.
+
+@item (apcupsd @var{args...})
+Call @command{apcupsd} while passing the correct configuration file and
+all the arguments.
+
+@item (mail-to-root @var{subject} @var{body})
+Send an email to the local administrator. This procedure assumes the
+@command{sendmail} is located at @command{/run/privileged/bin/sendmail}
+(as would be the case with @code{opensmtpd-service-type}).
+
+@end table
+
+Available @code{apcupsd-event-handlers} fields are:
+
+@table @asis
+@item @code{modules} (type: gexp)
+Additional modules to import into the generated handler script.
+
+@item @code{killpower} (type: gexp)
+The handler for the killpower event.
+
+@item @code{commfailure} (type: gexp)
+The handler for the commfailure event.
+
+@item @code{commok} (type: gexp)
+The handler for the commfailure event.
+
+@item @code{powerout} (type: gexp)
+The handler for the powerout event.
+
+@item @code{onbattery} (type: gexp)
+The handler for the onbattery event.
+
+@item @code{offbattery} (type: gexp)
+The handler for the offbattery event.
+
+@item @code{mainsback} (type: gexp)
+The handler for the mainsback event.
+
+@item @code{failing} (type: gexp)
+The handler for the failing event.
+
+@item @code{timeout} (type: gexp)
+The handler for the timeout event.
+
+@item @code{loadlimit} (type: gexp)
+The handler for the loadlimit event.
+
+@item @code{runlimit} (type: gexp)
+The handler for the runlimit event.
+
+@item @code{doreboot} (type: gexp)
+The handler for the doreboot event.
+
+@item @code{doshutdown} (type: gexp)
+The handler for the doshutdown event.
+
+@item @code{annoyme} (type: gexp)
+The handler for the annoyme event.
+
+@item @code{emergency} (type: gexp)
+The handler for the emergency event.
+
+@item @code{changeme} (type: gexp)
+The handler for the changeme event.
+
+@item @code{remotedown} (type: gexp)
+The handler for the remotedown event.
+
+@item @code{startselftest} (type: gexp)
+The handler for the startselftest event.
+
+@item @code{endselftest} (type: gexp)
+The handler for the endselftest event.
+
+@item @code{battdetach} (type: gexp)
+The handler for the battdetach event.
+
+@item @code{battattach} (type: gexp)
+The handler for the battattach event.
+
+@end table
+@end deftp
+
@node Audio Services
@subsection Audio Services
@@ -764,6 +764,7 @@ GNU_SYSTEM_MODULES = \
%D%/services/nix.scm \
%D%/services/nfs.scm \
%D%/services/pam-mount.scm \
+ %D%/services/power.scm \
%D%/services/science.scm \
%D%/services/security.scm \
%D%/services/security-token.scm \
new file mode 100644
@@ -0,0 +1,672 @@
+;;; Copyright © 2025 Tomas Volf <~@wolfsden.cz>
+
+;;;; Commentary:
+
+;;; Power-related services.
+
+;;;; Code:
+
+(define-module (gnu services power)
+ #:use-module (gnu)
+ #:use-module (gnu packages admin)
+ #:use-module (gnu packages linux)
+ #:use-module (gnu packages power)
+ #:use-module (gnu services configuration)
+ #:use-module (gnu services shepherd)
+ #:use-module (gnu services)
+ #:use-module (guix packages)
+ #:use-module (guix records)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+ #:export (apcupsd-service-type
+
+ apcupsd-configuration
+ apcupsd-configuration-apcupsd
+ apcupsd-configuration-shepherd-service-name
+ apcupsd-configuration-auto-start?
+ apcupsd-configuration-pid-file
+ apcupsd-configuration-debug-level
+ apcupsd-configuration-run-dir
+ apcupsd-configuration-name
+ apcupsd-configuration-cable
+ apcupsd-configuration-type
+ apcupsd-configuration-device
+ apcupsd-configuration-poll-time
+ apcupsd-configuration-on-batery-delay
+ apcupsd-configuration-battery-level
+ apcupsd-configuration-remaining-minutes
+ apcupsd-configuration-timeout
+ apcupsd-configuration-annoy-interval
+ apcupsd-configuration-annoy-delay
+ apcupsd-configuration-no-logon
+ apcupsd-configuration-kill-delay
+ apcupsd-configuration-net-server
+ apcupsd-configuration-net-server-ip
+ apcupsd-configuration-net-server-port
+ apcupsd-configuration-net-server-events-file
+ apcupsd-configuration-net-server-events-file-max-size
+ apcupsd-configuration-class
+ apcupsd-configuration-mode
+ apcupsd-configuration-stat-time
+ apcupsd-configuration-log-stats
+ apcupsd-configuration-data-time
+ apcupsd-configuration-facility
+ apcupsd-configuration-event-handlers
+
+ apcupsd-event-handlers
+ apcupsd-event-handlers-modules
+ apcupsd-event-handlers-annoyme
+ apcupsd-event-handlers-battattach
+ apcupsd-event-handlers-battdetach
+ apcupsd-event-handlers-changeme
+ apcupsd-event-handlers-commfailure
+ apcupsd-event-handlers-commok
+ apcupsd-event-handlers-doreboot
+ apcupsd-event-handlers-doshutdown
+ apcupsd-event-handlers-emergency
+ apcupsd-event-handlers-endselftest
+ apcupsd-event-handlers-failing
+ apcupsd-event-handlers-killpower
+ apcupsd-event-handlers-loadlimit
+ apcupsd-event-handlers-mainsback
+ apcupsd-event-handlers-offbattery
+ apcupsd-event-handlers-onbattery
+ apcupsd-event-handlers-powerout
+ apcupsd-event-handlers-remotedown
+ apcupsd-event-handlers-runlimit
+ apcupsd-event-handlers-startselftest
+ apcupsd-event-handlers-timeout))
+
+(define-configuration/no-serialization apcupsd-event-handlers
+ (modules
+ (gexp #~())
+ "Additional modules to import into the generated handler script.")
+ (killpower
+ (gexp
+ #~((wall "Apccontrol doing: apcupsd --killpower on UPS ~a" name)
+ (sleep 10)
+ (apcupsd "--killpower")
+ (wall "Apccontrol has done: apcupsd --killpower on UPS ~a" name)))
+ "The handler for the killpower event.")
+ (commfailure
+ (gexp
+ #~((let ((msg (format #f "~a Communications with UPS ~a lost."
+ (gethostname) name)))
+ (mail-to-root msg msg))
+ (wall "Warning: communications lost with UPS ~a" name)))
+ "The handler for the commfailure event.")
+ (commok
+ (gexp
+ #~((let ((msg (format #f "~a Communications with UPS ~a restored."
+ (gethostname) name)))
+ (mail-to-root msg msg))
+ (wall "Communications restored with UPS ~a" name)))
+ "The handler for the commfailure event.")
+ (powerout
+ (gexp
+ #~(#t))
+ "The handler for the powerout event.")
+ (onbattery
+ (gexp
+ #~((let ((msg (format #f "~a UPS ~a Power Failure !!!"
+ (gethostname) name)))
+ (mail-to-root msg msg))
+ (wall "Power failure on UPS ~a. Running on batteries." name)))
+ "The handler for the onbattery event.")
+ (offbattery
+ (gexp
+ #~((let ((msg (format #f "~a UPS ~a Power has returned."
+ (gethostname) name)))
+ (mail-to-root msg msg))
+ (wall "Power has returned on UPS ~a..." name)))
+ "The handler for the offbattery event.")
+ (mainsback
+ (gexp
+ #~((when (file-exists? powerfail-file)
+ (wall "Continuing with shutdown."))))
+ "The handler for the mainsback event.")
+ (failing
+ (gexp
+ #~((wall "Battery power exhausted on UPS ~a. Doing shutdown." name)))
+ "The handler for the failing event.")
+ (timeout
+ (gexp
+ #~((wall "Battery time limit exceeded on UPS ~a. Doing shutdown." name)))
+ "The handler for the timeout event.")
+ (loadlimit
+ (gexp
+ #~((wall "Remaining battery charge below limit on UPS ~a. Doing shutdown." name)))
+ "The handler for the loadlimit event.")
+ (runlimit
+ (gexp
+ #~((wall "Remaining battery runtime below limit on UPS ~a. Doing shutdown." name)))
+ "The handler for the runlimit event.")
+ (doreboot
+ (gexp
+ #~((wall "UPS ~a initiating Reboot Sequence" name)
+ (system* #$(file-append shepherd "/sbin/reboot"))))
+ "The handler for the doreboot event.")
+ (doshutdown
+ (gexp
+ #~((wall "UPS ~a initiated Shutdown Sequence" name)
+ (system* #$(file-append shepherd "/sbin/halt"))))
+ "The handler for the doshutdown event.")
+ (annoyme
+ (gexp
+ #~((wall "Power problems with UPS ~a. Please logoff." name)))
+ "The handler for the annoyme event.")
+ (emergency
+ (gexp
+ #~((wall "Emergency Shutdown. Possible battery failure on UPS ~a." name)))
+ "The handler for the emergency event.")
+ (changeme
+ (gexp
+ #~((let ((msg (format #f "~a UPS ~a battery needs changing NOW."
+ (gethostname) name)))
+ (mail-to-root msg msg))
+ (wall "Emergency! Batteries have failed on UPS ~a. Change them NOW." name)))
+ "The handler for the changeme event.")
+ (remotedown
+ (gexp
+ #~((wall "Remote Shutdown. Beginning Shutdown Sequence.")))
+ "The handler for the remotedown event.")
+ (startselftest
+ (gexp
+ #~(#t))
+ "The handler for the startselftest event.")
+ (endselftest
+ (gexp
+ #~(#t))
+ "The handler for the endselftest event.")
+ (battdetach
+ (gexp
+ #~(#t))
+ "The handler for the battdetach event.")
+ (battattach
+ (gexp
+ #~(#t))
+ "The handler for the battattach event."))
+
+(define-syntax define-enum
+ (lambda (x)
+ (syntax-case x ()
+ ((_ name values)
+ (let* ((datum/name (syntax->datum #'name))
+ (datum/predicate (string->symbol
+ (format #f "enum-~a?" datum/name)))
+ (datum/serialize (string->symbol
+ (format #f "serialize-enum-~a" datum/name))))
+ (with-syntax
+ ((predicate (datum->syntax x datum/predicate))
+ (serialize (datum->syntax x datum/serialize)))
+ #'(begin
+ (define (predicate value)
+ (memq value values))
+ (define serialize serialize-symbol))))))))
+
+(define mangle-field-name
+ (match-lambda
+ ('name "UPSNAME")
+ ('cable "UPSCABLE")
+ ('type "UPSTYPE")
+ ('device "DEVICE")
+ ('poll-time "POLLTIME")
+ ('lock-dir "LOCKFILE")
+ ('power-fail-dir "PWRFAILDIR")
+ ('no-login-dir "NOLOGINDIR")
+ ('on-batery-delay "ONBATTERYDELAY")
+ ('battery-level "BATTERYLEVEL")
+ ('remaining-minutes "MINUTES")
+ ('timeout "TIMEOUT")
+ ('annoy-interval "ANNOY")
+ ('annoy-delay "ANNOYDELAY")
+ ('no-logon "NOLOGON")
+ ('kill-delay "KILLDELAY")
+ ('net-server "NETSERVER")
+ ('net-server-ip "NISIP")
+ ('net-server-port "NISPORT")
+ ('net-server-events-file "EVENTSFILE")
+ ('net-server-events-file-max-size "EVENTSFILEMAX")
+ ('class "UPSCLASS")
+ ('mode "UPSMODE")
+ ('stat-time "STATTIME")
+ ('stat-file "STATFILE")
+ ('log-stats "LOGSTATS")
+ ('data-time "DATATIME")
+ ('facility "FACILITY")))
+
+(define (serialize-string field-name value)
+ #~(format #f "~a ~a\n" #$(mangle-field-name field-name) '#$value))
+(define serialize-symbol serialize-string)
+(define serialize-integer serialize-string)
+(define (serialize-boolean field-name value)
+ #~(format #f "~a ~a\n"
+ #$(mangle-field-name field-name)
+ #$(if value "on" "off")))
+
+(define-maybe string)
+
+(define-enum cable '( simple smart ether usb
+ 940-0119A 940-0127A 940-0128A 940-0020B 940-0020C
+ 940-0023A 940-0024B 940-0024C 940-1524C 940-0024G
+ 940-0095A 940-0095B 940-0095C 940-0625A MAM-04-02-2000))
+(define-enum type '(apcsmart usb net snmp netsnmp dumb pcnet modbus test))
+(define-enum no-logon '(disable timeout percent minutes always))
+(define-enum class '(standalone shareslave sharemaster))
+(define-enum mode '(disable share))
+
+(define-configuration apcupsd-configuration
+ (apcupsd (package apcupsd) "The @code{apcupsd} package to use.")
+
+ (shepherd-service-name
+ (symbol 'apcupsd)
+ "The name of the shepherd service. You can add the service multiple times
+with different names to manage multiple UPSes."
+ empty-serializer)
+ (auto-start?
+ (boolean #t)
+ "Should the shepherd service auto-start?"
+ empty-serializer)
+ (pid-file
+ (string "/run/apcupsd.pid")
+ "The file name of the PID file."
+ empty-serializer)
+ (debug-level
+ (integer 0)
+ "The logging verbosity. Bigger number means more logs. The source code
+uses up to @code{300} as debug level value, so a value of @code{999} seems
+reasonable to enable all the logs."
+ empty-serializer)
+
+ (run-dir
+ (string "/run/apcupsd")
+ "The directory containing runtime information. You need to change this if
+you desire to run multiple instances of the daemon."
+ empty-serializer)
+
+ ;; General configuration parameters
+ (name
+ maybe-string
+ "Use this to give your UPS a name in log files and such. This is
+particularly useful if you have multiple UPSes. This does not set the EEPROM.
+It should be 8 characters or less.")
+ (cable
+ (enum-cable 'usb)
+ "The type of a cable connecting the UPS to your computer. Possible generic
+choices are @code{'simple}, @code{'smart}, @code{'ether} and
+@code{'usb}.
+
+Alternatively, a specific cable model number may be used: @code{'940-0119A},
+@code{'940-0127A}, @code{'940-0128A}, @code{'940-0020B}, @code{'940-0020C},
+@code{'940-0023A}, @code{'940-0024B}, @code{'940-0024C}, @code{'940-1524C},
+@code{'940-0024G}, @code{'940-0095A}, @code{'940-0095B}, @code{'940-0095C},
+@code{'940-0625A}, @code{'M-04-02-2000}.")
+ (type
+ (enum-type 'usb)
+ "The type of the UPS you have.
+
+@table @code
+@item apcsmart
+Newer serial character device, appropriate for SmartUPS models using a serial
+cable (not an USB).
+
+@item usb
+Most new UPSes are an USB.
+
+@item net
+Network link to a master apcupsd through apcupsd's Network Information Server.
+This is used if the UPS powering your computer is connected to a different
+computer for monitoring.
+
+@item snmp
+SNMP network link to an SNMP-enabled UPS device.
+
+@item netsnmp
+Same as the SNMP above but requires use of the net-snmp library. Unless you
+have a specific need for this old driver, you should use the @code{'snmp}
+instead.
+
+@item dumb
+An old serial character device for use with simple-signaling UPSes.
+
+@item pcnet
+A PowerChute Network Shutdown protocol which can be used as an alternative to
+an SNMP with the AP9617 family of smart slot cards.
+
+@item modbus
+A serial device for use with newest SmartUPS models supporting the MODBUS
+protocol.
+
+@end table")
+ (device
+ (string "")
+ "For USB UPSes, usually you want to set this to an empty string (the
+default). For other UPS types, you must specify an appropriate port or
+address.
+
+@table @code
+@item apcsmart
+Set to the appropriate @file{/dev/tty**} device.
+
+@item usb
+A null string setting enables auto-detection, which is the best choice for
+most installations.
+
+@item net
+Set to @code{@var{hostname}:@var{port}}.
+
+@item snmp
+Set to @code{@var{hostname}:@var{port}:@var{vendor}:@var{community}}. The
+@var{hostname} is the ip address or hostname of the UPS on the network. The
+@var{vendor} can be can be \"APC\" or \"APC_NOTRAP\". \"APC_NOTRAP\" will
+disable SNMP trap catching; you usually want \"APC\". The @var{port} is
+usually 161. The @var{community} is usually \"private\".
+
+@item netsnmp
+Same as the @code{'snmp}.
+
+@item dumb
+Set to the appropriate @file{/dev/tty**} device.
+
+@item pcnet
+Set to @code{@var{ipaddr}:@var{username}:@var{passphrase}:@var{port}}. The
+@var{ipaddr} is the IP address of the UPS management card. The @var{username}
+and the @var{passphrase} are the credentials for which the card has been
+configured. The @var{port} is the port number on which to listen for messages
+from the UPS, normally 3052. If this parameter is empty or missing, the
+default of 3052 will be used.
+
+@item modbus
+Set to the appropriate @file{/dev/tty**} device. You can also leave it empty
+for MODBUS over USB or set to the serial number of the UPS.
+
+@end table")
+ (poll-time
+ (integer 60)
+ "The interval (in seconds) at which apcupsd polls the UPS for status. This
+setting applies both to directly-attached UPSes (apcsmart, usb, dumb) and
+networked UPSes (net, snmp). Lowering this setting will improve the apcupsd's
+responsiveness to certain events at the cost of higher CPU utilization.")
+
+ ;; Configuration parameters used during power failures
+ (on-batery-delay
+ (integer 6)
+ "The time in seconds from when a power failure is detected until we react
+to it with an onbattery event. The @code{'powerout} event will be triggered
+immediately when a power failure is detected. However, the @code{'onbattery}
+event will be trigger only after this delay.")
+ (battery-level
+ (integer 5)
+ "If during a power failure, the remaining battery percentage (as reported
+by the UPS) is below or equal to this value, the apcupsd will initiate a
+system shutdown.
+
+@quotation Note
+@code{battery-level}, @code{remaining-minutes}, and @code{timeout} work
+in a conjunction, so the first that occurs will cause the initation of a
+shutdown.
+@end quotation")
+ (remaining-minutes
+ (integer 3)
+ "If during a power failure, the remaining runtime in minutes (as calculated
+internally by the UPS) is below or equal to this value, apcupsd will initiate
+a system shutdown.
+
+@quotation Note
+@code{battery-level}, @code{remaining-minutes}, and @code{timeout} work
+in a conjunction, so the first that occurs will cause the initation of a
+shutdown.
+@end quotation")
+ (timeout
+ (integer 0)
+ "If during a power failure, the UPS has run on batteries for this many
+seconds or longer, apcupsd will initiate a system shutdown. The value of 0
+disables this timer.
+
+@quotation Note
+@code{battery-level}, @code{remaining-minutes}, and @code{timeout} work
+in a conjunction, so the first that occurs will cause the initation of a
+shutdown.
+@end quotation")
+ (annoy-interval
+ (integer 300)
+ "The time in seconds between annoying users (via the @code{'annoyme} event)
+to sign off prior to system shutdown. 0 disables.")
+ (annoy-delay
+ (integer 60)
+ "The initial delay in seconds after a power failure before warning users to
+get off the system.")
+ (no-logon
+ (enum-no-logon 'disable)
+ "The condition which determines when users are prevented from logging in
+during a power failure.")
+ (kill-delay
+ (integer 0)
+ "If this is non-zero, the apcupsd will continue running after a shutdown
+has been requested, and after the specified time in seconds attempt to kill
+the power. This is for use on systems where apcupsd cannot regain control
+after a shutdown.")
+
+ ;; Configuration statements for Network Information Server
+ (net-server
+ (boolean #f)
+ "If enabled, a network information server process will be started.")
+ (net-server-ip
+ (string "127.0.0.1")
+ "An IP address on which the NIS server will listen for incoming
+connections.")
+ (net-server-port
+ (integer 3551)
+ "An IP port on which the NIS server will listen for incoming connections.")
+ (net-server-events-file
+ maybe-string
+ "If you want the last few EVENTS to be available over the network by the
+network information server, you must set this to a file name.")
+ (net-server-events-file-max-size
+ (integer 10)
+ "The maximum size of the events file in kilobytes.")
+ ;; Configuration statements used if sharing a UPS with more than one machine
+ (class (enum-class 'standalone)
+ "Normally standalone unless you share an UPS using an APC ShareUPS card.")
+ (mode (enum-mode 'disable)
+ "Normally disable unless you share an UPS using an APC ShareUPS card.")
+ ;; Configuration statements to control apcupsd system logging
+ (stat-time
+ (integer 0)
+ "The time interval in seconds between writing the status file, 0
+disables.")
+ (log-stats
+ (boolean #f)
+ "Also write the stats as a logs. This generates a lot of output.")
+ (data-time
+ (integer 0)
+ "The time interval in seconds between writing the data records to the log
+file, 0 disables.")
+ (facility
+ maybe-string
+ "The logging facility for the syslog.")
+
+ ;; Event handlers
+ (event-handlers
+ (apcupsd-event-handlers (apcupsd-event-handlers))
+ "Handlers for events produced by apcupsd."
+ empty-serializer))
+
+(define (%apccontrol config)
+ (program-file
+ "apccontrol"
+ (match-record (apcupsd-configuration-event-handlers config)
+ <apcupsd-event-handlers>
+ ( killpower commfailure commok powerout onbattery offbattery mainsback
+ failing timeout loadlimit runlimit doreboot doshutdown annoyme
+ emergency changeme remotedown startselftest endselftest battdetach
+ battattach )
+ #~(begin
+ (use-modules (ice-9 format)
+ (ice-9 match)
+ (ice-9 popen)
+ (srfi srfi-9)
+ #$@(apcupsd-event-handlers-modules
+ (apcupsd-configuration-event-handlers config)))
+ ;; Script dir depends on these, and the configuration depends on the
+ ;; script dir. To sever the cyclic dependency, pass the file names via
+ ;; environment variables.
+ (define conf (getenv "GUIX_APCUPSD_CONF"))
+ (define powerfail-file (getenv "GUIX_APCUPSD_POWERFAIL_FILE"))
+
+ (define (err . args)
+ (apply format (current-error-port) args))
+ (define (wall . args)
+ (system* #$(file-append util-linux "/bin/wall") (apply format #f args)))
+ (define (apcupsd . args)
+ (apply system* #$(file-append apcupsd "/sbin/apcupsd") "-f" conf args))
+ (define (mail-to-root subject body)
+ (let ((port (open-pipe* OPEN_WRITE
+ "/run/privileged/bin/sendmail"
+ "-F" "apcupsd"
+ "root")))
+ (format port "Subject: ~a~%~%~a~&" subject body)
+ (close-pipe port)))
+ (match (cdr (command-line))
+ (((? string? cmd) name connected powered)
+ (let ((connected? (match connected
+ ("1" #t)
+ ("0" #f)))
+ (powered? (match powered
+ ("1" #t)
+ ("0" #f))))
+ (match cmd
+ ("killpower" #$killpower)
+ ("commfailure" #$commfailure)
+ ("commok" #$commok)
+ ("powerout" #$powerout)
+ ("onbattery" #$onbattery)
+ ("offbattery" #$offbattery)
+ ("mainsback" #$mainsback)
+ ("failing" #$failing)
+ ("timeout" #$timeout)
+ ("loadlimit" #$loadlimit)
+ ("runlimit" #$runlimit)
+ ("doreboot" #$doreboot)
+ ("doshutdown" #$doshutdown)
+ ("annoyme" #$annoyme)
+ ("emergency" #$emergency)
+ ("changeme" #$changeme)
+ ("remotedown" #$remotedown)
+ ("startselftest" #$startselftest)
+ ("endselftest" #$endselftest)
+ ("battdetach" #$battdetach)
+ ("battattach" #$battattach)
+ (_
+ (err "Unknown event: ~a~%" cmd)
+ (err "Iff the event was emitted by apcupsd, this is a bug.~%")
+ (err "Please report to bug-guix@gnu.org.~%")
+ (exit #f)))))
+ (args
+ (err "Unknown arguments: ~a~%" args)
+ (err "Iff the arguments were passed by apcupsd, this is a bug.~%")
+ (err "Please report to bug-guix@gnu.org.~%")
+ (exit #f)))))))
+
+(define (apcupsd-script-dir config)
+ (computed-file
+ "apcupsd-script-dir"
+ #~(begin
+ (mkdir #$output)
+ (chdir #$output)
+ (symlink #$(%apccontrol config) "apccontrol"))))
+
+(define (apcupsd-config-file config)
+ (let ((run-dir (apcupsd-configuration-run-dir config)))
+ (mixed-text-file
+ "apcupsd.conf"
+ "\
+## apcupsd.conf v1.1 ##
+#
+# for apcupsd - GNU Guix
+#
+# \"apcupsd\" POSIX config file (generated by apcupsd-service-type)
+"
+ (serialize-configuration config apcupsd-configuration-fields)
+ ;; This one is confusing. The manual page states:
+ ;;
+ ;; > It must be changed when running more than one copy of apcupsd on the
+ ;; > same computer to control multiple UPSes.
+ ;;
+ ;; However would you not want the lock to be per-device, not per-process?
+ ;; I decided to follow the documentation, but I do not understand why it
+ ;; should be like this. I do not have multiple UPSes to try.
+ (serialize-string 'lock-dir (string-append run-dir "/lock"))
+ (serialize-string 'power-fail-dir run-dir)
+ (serialize-string 'no-login-dir run-dir)
+ (serialize-string 'stat-file (string-append run-dir "/apcupsd.status"))
+ "SCRIPTDIR " (apcupsd-script-dir config) "\n")))
+
+(define (apcupsd-activation config)
+ (match-record config <apcupsd-configuration> (run-dir)
+ #~(begin
+ (use-modules (guix build utils))
+ (mkdir-p #$(string-append run-dir "/lock")))))
+
+(define (apcupsd-shepherd-services config)
+ (match-record config <apcupsd-configuration>
+ ( apcupsd pid-file debug-level run-dir
+ shepherd-service-name auto-start?)
+ (let ((config-file (apcupsd-config-file config)))
+ (list
+ (shepherd-service
+ (documentation "Run the apcupsd daemon.")
+ (requirement '(user-processes))
+ (provision (list shepherd-service-name))
+ (auto-start? auto-start?)
+ (start #~(make-forkexec-constructor
+ '(#$(file-append apcupsd "/sbin/apcupsd")
+ "-b" ;do not daemonize
+ "-f" #$config-file
+ "-P" #$pid-file
+ "-d" #$(number->string debug-level))
+ #:log-file
+ #$(format #f "/var/log/~a.log" shepherd-service-name)
+ #:environment-variables
+ (cons* (string-append "GUIX_APCUPSD_CONF="
+ #$config-file)
+ #$(string-append "GUIX_APCUPSD_POWERFAIL_FILE="
+ run-dir "/powerfail")
+ (default-environment-variables))))
+ (stop #~(make-kill-destructor))
+ (actions (list (shepherd-configuration-action config-file))))))))
+
+(define (apcupsd-pam-extensions config)
+ ;; The apcupsd can be configured to prevent users from logging in on certain
+ ;; conditions. This is implemented by creation of a "nologin" file, and
+ ;; using a pam nologin module to prevent the login (if the file exists).
+ (define pam-nologin
+ (pam-entry
+ (control "required")
+ (module "pam_nologin.so")
+ (arguments (list (string-append "file="
+ (apcupsd-configuration-run-dir config)
+ "/nologin")))))
+
+ (list (pam-extension
+ (transformer
+ (lambda (pam)
+ (pam-service
+ (inherit pam)
+ (auth (cons pam-nologin (pam-service-auth pam)))))))))
+
+(define apcupsd-service-type
+ (service-type
+ (name 'apcupsd)
+ (description "Configure and optionally start the apcupsd.")
+ (extensions (list (service-extension activation-service-type
+ apcupsd-activation)
+ (service-extension shepherd-root-service-type
+ apcupsd-shepherd-services)
+ (service-extension pam-root-service-type
+ apcupsd-pam-extensions)))
+ (compose identity)
+ (extend (lambda (cfg lst)
+ (fold (cut <> <>) cfg lst)))
+ (default-value (apcupsd-configuration))))