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HOW-TO - Botão de força com ACPI
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fernandotcl
Veteran
Veteran


Joined: 20 Nov 2003
Posts: 1396
Location: Sao Paulo, Brazil

PostPosted: Fri Aug 06, 2004 1:19 am    Post subject: HOW-TO - Botão de força com ACPI Reply with quote

Para usar ACPI, é necessário compilar o kernel com suporte à ACPI e às seções desejadas:
Code:
Power management options (ACPI, APM) --->
  [*] Power Management support
  ACPI (Advanced Configuration and Power Interface) Support --->
    [*] ACPI Support
      <*/M> Button


Depois devemos instalar o acpid:
Code:
# emerge acpid


E então editar o arquivo "/etc/acpi/default.sh":
Code:
#!/bin/sh
# Default acpi script that takes an entry for all actions

set $*

group=${1/\/*/}
action=${1/*\//}

case "$group" in
    button)
        case "$action" in
            power)
                xstatus=`pgrep xinit`
                if [ ! -z $xstatus ] ; then
                    button=`gtkshutdown`
                    case "$button" in
                        0)  ;;
                        1)  halt
                            ;;
                        2)  reboot
                            ;;
                        *)  logger "Ocorreu um erro enquanto GtkShutdown era executado."
                            ;;
                    esac
                fi
                ;;
            *)  logger "ACPI action $action is not defined"
                ;;
        esac
        ;;

    *)  logger "ACPI group $group / action $action is not defined"
        ;;
esac

No exemplo acima, o programa GtkShutDown foi utilizado para apresentar uma mensagem perguntando ao usuário como proceder. No entanto, qualquer ação pode ser tomada para reagir com o evento do pressionamento do botão de força.

Agora basta ajustar o acpid para iniciar com a máquina e iniciar o serviço para testar:
Code:
rc-update add acpid default
/etc/init.d/acpid start


NOTAS:
    - Eu experienciei problemas com o acpid. De vez em quando tive que reiniciar o serviço para que voltasse a funcionar.
    - O GtkShutDown está procurando algum mantenedor, já que eu não uso mais o acpid e então não estou mais atualizando o projeto.



---
Sugestões e alterações são bem vindas. :wink:
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Kobal
Guru
Guru


Joined: 12 Feb 2004
Posts: 323
Location: Brasil / Brazil / Brésil / Brasilien / el Brasil

PostPosted: Fri Aug 06, 2004 4:54 am    Post subject: Reply with quote

falo nada, :roll: eu sempre compilo acpi, então ele não servia pra nada. :roll:
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Mythos
l33t
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Joined: 02 May 2004
Posts: 953
Location: Portugal

PostPosted: Fri Aug 06, 2004 1:27 pm    Post subject: Reply with quote

Code:
#/etc/acpi/events/default:

# This is the ACPID default configuration, it takes all
# events and passes them to /etc/acpi/default.sh for further
# processing.

# event keeps a regular expression matching the event. To get
# power events only, just use something like "event=button power.*"
# to catch it.
# action keeps the command to be executed after an event occurs
# In case of the power event above, your entry may look this way:
event=button power.*
action=/sbin/init 0

# Optionally you can specify the placeholder %e. It will pass
# through the whole kernel event message to the program you've
# specified.

event=.*
action=/etc/acpi/default.sh %e


Para carregar no power e o PC se desligar uso isto.
_________________
Best Regards,
Sérgio Henrique
Linux dune 3.0.6-gentoo #1 SMP Thu Oct 27 16:47:29 WEST 2011 x86_64 Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz GenuineIntel GNU/Linux
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