The Linux ACPID Command
What is Linux ACPID Command?
Explanation
ACPID Linux Command:
The ACPID Linux acommand is the abbreviation for Advanced Configuration and Power Interface event Daemon. This command notifies the user-space programs of ACPI events. This command is started during system boot and runs in background by default. The command checks the event file located at "/proc/acpi/event" for any event, and if matched executes a set of rules pertaining to that event. In simple words the command executes programs to handle an event when occured. Rules are defined in configuration files located at /etc/acpi/events directory by default. Each file defines an event and an action for that event. These events are triggered by certain actions, such as:
- Pressing special keys like Power button, Sleep button
- Closing a notebook lid
- Plugging or unplugging AC power adapter
- Plugging or unplugging phone jack etc.
SYNTAX :
acpid [OPTIONS]
OPTIONS:
-c, --confdir
Set the configuration directory.
-C, --clientmax
Set the limit on non-root socket connections.
-e, --eventfile
Use the specified file for events.
-f, --foreground
Run in the foreground.
-l, --logevents
Log all event activity.
-g, --socketgroup
Set the group on the socket file.
-m, --socketmode
Set the permissions on the socket file.
-s, --socketfile
Use the specified socket file.
-S, --nosocket
Do not listen on a UNIX socket (overrides -s).
-p, --pidfile
Use the specified PID file.
-L, --lockfile
Use the specified lockfile to stop processing.
-n, --netlink
Force netlink/input layer mode. (overrides -e)
-r, --dropaction
Define the pseudo-action to drop an event.
-v, --version
Print version information.
-h, --help
Print this message.
EXAMPLE:
- This example - placed in /etc/acpi/events/powerbtn - will shut down your system if you press the power button.
event=button[ /]power
action=/etc/acpi/powerbtn.sh
In the above example, the powerbtn.sh file placed under the /etc/acpi/events folder is called to execute the command.
acpid [OPTIONS]
OPTIONS:
-c, --confdir
Set the configuration directory.
-C, --clientmax
Set the limit on non-root socket connections.
-e, --eventfile
Use the specified file for events.
-f, --foreground
Run in the foreground.
-l, --logevents
Log all event activity.
-g, --socketgroup
Set the group on the socket file.
-m, --socketmode
Set the permissions on the socket file.
-s, --socketfile
Use the specified socket file.
-S, --nosocket
Do not listen on a UNIX socket (overrides -s).
-p, --pidfile
Use the specified PID file.
-L, --lockfile
Use the specified lockfile to stop processing.
-n, --netlink
Force netlink/input layer mode. (overrides -e)
-r, --dropaction
Define the pseudo-action to drop an event.
-v, --version
Print version information.
-h, --help
Print this message.
EXAMPLE:
- This example - placed in /etc/acpi/events/powerbtn - will shut down your system if you press the power button.
event=button[ /]power
action=/etc/acpi/powerbtn.sh
In the above example, the powerbtn.sh file placed under the /etc/acpi/events folder is called to execute the command.
| -c, --confdir | Set the configuration directory. |
| -C, --clientmax | Set the limit on non-root socket connections. |
| -e, --eventfile | Use the specified file for events. |
| -f, --foreground | Run in the foreground. |
| -l, --logevents | Log all event activity. |
| -g, --socketgroup | Set the group on the socket file. |
| -m, --socketmode | Set the permissions on the socket file. |
| -s, --socketfile | Use the specified socket file. |
| -S, --nosocket | Do not listen on a UNIX socket (overrides -s). |
| -p, --pidfile | Use the specified PID file. |
| -L, --lockfile | Use the specified lockfile to stop processing. |
| -n, --netlink | Force netlink/input layer mode. (overrides -e) |
| -r, --dropaction | Define the pseudo-action to drop an event. |
| -v, --version | Print version information. |
| -h, --help | Print this message. |
- This example - placed in /etc/acpi/events/powerbtn - will shut down your system if you press the power button.event=button[ /]power action=/etc/acpi/powerbtn.shIn the above example, the powerbtn.sh file placed under the /etc/acpi/events folder is called to execute the command.
