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From: Michael Olbrich <mol@pengutronix.de>
Date: Fri, 08 Jan 2021 10:29:18 +0100
Subject: Re: [ptxdist] [APPLIED] machine-id: make using rc-once optional
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To: ptxdist@pengutronix.de
Cc: Artur Wiebe <artur@4wiebe.de>

Thanks, applied as 91fcb28b61c6ddcc9b0e1542822eb81c80b58d82.

Michael

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On Fri, 08 Jan 2021 10:29:18 +0100, Artur Wiebe <artur@4wiebe.de> wrote:
> If not set /etc/machine-id will be installed from projectroot (default: empty file).
> 
> Signed-off-by: Artur Wiebe <artur@4wiebe.de>
> Message-Id: <20201204093024.1785079-1-artur@4wiebe.de>
> Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
> 
> diff --git a/projectroot/etc/machine-id b/projectroot/etc/machine-id
> new file mode 100644
> index 000000000000..e69de29bb2d1
> diff --git a/rules/machine-id.in b/rules/machine-id.in
> index f18fec554cf1..9ad6db935d21 100644
> --- a/rules/machine-id.in
> +++ b/rules/machine-id.in
> @@ -1,11 +1,26 @@
>  ## SECTION=initmethod
>  
> -config MACHINE_ID
> +menuconfig MACHINE_ID
>  	tristate
> -	prompt "create /etc/machine-id"
> -	select RC_ONCE			if RUNTIME
> -	select UTIL_LINUX_NG		if !INITMETHOD_SYSTEMD
> -	select UTIL_LINUX_NG_UUIDGEN	if !INITMETHOD_SYSTEMD
> +	prompt "create /etc/machine-id      "
> +	select RC_ONCE			if MACHINE_ID_RC_ONCE && RUNTIME
> +	select UTIL_LINUX_NG		if MACHINE_ID_RC_ONCE && !INITMETHOD_SYSTEMD
> +	select UTIL_LINUX_NG_UUIDGEN	if MACHINE_ID_RC_ONCE && !INITMETHOD_SYSTEMD
>  	help
>  	  Enable this to make sure there is always a unique /etc/machine-id
>  	  available in the system.
> +
> +if MACHINE_ID
> +
> +config MACHINE_ID_RC_ONCE
> +	bool "generate (bbinit) or save (systemd) machine-id using rc-once at first boot"
> +	default y
> +	help
> +	  If not set /etc/machine-id will be installed from projectroot
> +	  (default: empty file).
> +	  Systemd:
> +	  If /etc/machine-id exists and is empty, systemd will bind-mount
> +	  a file containing the new machine-id over it and later try 
> +	  to commit it to disk (if /etc/ is writable).
> +
> +endif
> diff --git a/rules/machine-id.make b/rules/machine-id.make
> index 3883d64cba3a..50e9b99ee2e8 100644
> --- a/rules/machine-id.make
> +++ b/rules/machine-id.make
> @@ -27,7 +27,11 @@ $(STATEDIR)/machine-id.targetinstall:
>  	@$(call install_fixup,machine-id,AUTHOR,"Michael Olbrich <m.olbrich@pengutronix.de>")
>  	@$(call install_fixup,machine-id,DESCRIPTION,missing)
>  
> +ifdef PTXCONF_MACHINE_ID_RC_ONCE
>  	@$(call install_alternative, machine-id, 0, 0, 0755, /etc/rc.once.d/machine-id)
> +else
> +	@$(call install_alternative, machine-id, 0, 0, 0444, /etc/machine-id)
> +endif
>  
>  	@$(call install_finish,machine-id)
>  
> diff --git a/rules/machine-id.postinst b/rules/machine-id.postinst
> index 2060129d14eb..208f7b4b8d56 100644
> --- a/rules/machine-id.postinst
> +++ b/rules/machine-id.postinst
> @@ -1,3 +1,5 @@
>  #!/bin/sh
> -touch "$DESTDIR/etc/machine-id"
> -$DESTDIR/usr/sbin/enable-rc-once machine-id
> +if [ -f $DESTDIR/etc/rc.once.d/machine-id ]; then
> +	touch "$DESTDIR/etc/machine-id"
> +	$DESTDIR/usr/sbin/enable-rc-once machine-id
> +fi

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