The acpid (Advanced Configuration and Power Interface event daemon) is a completely flexible, totally extensible daemon for delivering ACPI events. It listens on netlink interface and when an event occurs, executes programs to handle the event. The programs it executes are configured through a set of configuration files, which can be dropped into place by packages or by the user.
          
            Some other packages may handle some ACPI events as well and they
            may conflict with this package. For example, Systemd-255 (read the documentation for
            Handle*= in logind.conf(5) for details) and UPower-1.90.2 (used
            by many desktop environments such as GNOME, KDE, and XFCE for
            handling ACPI events). If you've installed such a package and
            it's enough for your use case, this package is probably not
            needed. If you really need this package, you must be careful
            configuring it and the other packages handling ACPI events to
            avoid conflicts. Notably, Systemd-255
            handles some ACPI events by default, so the handling of these
            events by Systemd-255 should
            be disabled first if handling these events with acpid (again,
            read logind.conf(5) for details).
          
          LFS や依存パッケージが本ブックに示す最新安定バージョンでなかった場合には、BLFS 開発版においては、パッケージのビルドや処理実行が適切に行われないことがあります。
ダウンロード (HTTP): https://downloads.sourceforge.net/acpid2/acpid-2.0.34.tar.xz
ダウンロード MD5 sum: 988c2e3fd5ba0ea4492d3ba7273af295
ダウンロードサイズ: 160 KB
必要ディスク容量: 1.9 MB
概算ビルド時間: 0.1 SBU 以下
以下のコマンドを実行して acpid をビルドします。
./configure --prefix=/usr \
            --docdir=/usr/share/doc/acpid-2.0.34 &&
make
        このパッケージにテストスイートはありません。
          root ユーザーになって以下を実行します。
        
make install && install -v -m755 -d /etc/acpi/events && cp -r samples /usr/share/doc/acpid-2.0.34
          acpid is configured by user
          defined events. Place event files under /etc/acpi/events directory. If an event occurs,
          acpid recurses
          through the event files in order to see if the regex defined after
          "event" matches. If they do, action is executed.
        
The following brief example will suspend the system when the laptop lid is closed. The example also disables the default handling of the lid close event by Systemd-255 when the system is on battery and not connected to any external monitor, in order to avoid a conflict:
cat > /etc/acpi/events/lid << "EOF"event=button/lid action=/etc/acpi/lid.shEOF cat > /etc/acpi/lid.sh << "EOF"#!/bin/sh /bin/grep -q open /proc/acpi/button/lid/LID/state && exit 0 /usr/bin/systemctl suspendEOF chmod +x /etc/acpi/lid.sh mkdir -pv /etc/systemd/logind.conf.d echoHandleLidSwitch=ignore> /etc/systemd/logind.conf.d/acpi.conf
          Unfortunately, not every computer labels ACPI events in the same
          way (for example, the lid may be recognized as LID0 instead of LID). To determine how your buttons are
          recognized, use the acpi_listen tool. Also, look in
          the samples directory under
          /usr/share/doc/acpid-2.0.34 for more
          examples.
        
            To start the acpid
            daemon at boot, install the systemd unit from the blfs-systemd-units-20231205 package by
            running the following command as the root user:
          
make install-acpid
            This package uses socket based activation and will be started when something needs it. No standalone unit file is provided for this package.