Hotplug event example

This example shows how to trigger hotplug events when some hotpluggable device is attached or removed from the system.

Currently only FreeBSD's hotplug system is supported.

Compilation

Easiest way to get this example running is to go to examples directory in package root, and run:

$ ./build.sh hotplug_events

build.sh script compiles Ano script to C, copies source files in place and pops up instructions what to do next. Follow them. Check also examples/README for more info.

Preview

; ------------------------------------------------------------------------------
; hotplug_events.ano
;
; To compile:
;
; $ ./build/ano ./examples/hotplug_events/hotplug_events.ano > \
;     engine/dsl_ano.h
; ------------------------------------------------------------------------------
;
; @ANO_SCRIPT_NAME		hotplug_events
; @ANO_SCRIPT_VERSION		0.0.1
; @ANO_SCRIPT_DESCRIPTION	Simple hotplug event example
;
; @ANO_FLAGS_USE_PROTOS		[ ]
; @ANO_FLAGS_VAR_NAME_SUBS	[ ]
; @ANO_FLAGS_VAR_WARN_UNUSED	[ ]
;
; Copyright © 2016-2026, Jani Salonen <salojan@goto10.co>
; All rights reserved.
;
; This example shows how to trigger hotplug events when some hotpluggable
; device is attached or removed from the system.
;
; Currently only FreeBSD's hotplug system is supported.
;

main {
	; Initialize hotplug notifications if it is enabled.
	;
	hotplug_enabled {
		hotplug_init (\
			cb_attach:		"hp_attach", \
			cb_detach:		"hp_detach", \
			cb_notify:		"hp_notify")

		print "Now attach or remove some USB device for example to" \
			" see callback doing its\nwork.\n"
		print "Waiting for inotify events, "
	}

	print "press <ctrl-c> to break.\n"
}

_HOTPLUG_EVENT_ callback hp_attach (_hnd, _key, _val) {
	; Hotplug device attached.
	;
	print "Device attached, details below:\n"

	dump _hnd
	dump _key
	dump _val

	print "\n"
}

_HOTPLUG_EVENT_ callback hp_detach (_hnd, _key, _val) {
	; Hotplug device detached.
	;
	print "Device detached, details below:\n"

	dump _hnd
	dump _key
	dump _val

	print "\n"
}

_HOTPLUG_EVENT_ callback hp_notify (_hnd, _key, _val) {
	; Hotplug device notify.
	;
	print "Device notification, details below:\n"

	dump _hnd
	dump _key
	dump _val

	print "\n"
}

; ------------------------------------------------------------------------------
; hotplug_events.w2c
;
; To compile:
;
; $ ./build/widget ./examples/hotplug_events/hotplug_events.w2c > \
;     engine/widget_defs.h
; ------------------------------------------------------------------------------

; ------------------------------------------------------------------------------
; hotplug_events.m2c
;
; To compile:
;
; $ ./build/menu ./examples/hotplug_events/hotplug_events.m2c > \
;     engine/menu_defs.h
; ------------------------------------------------------------------------------