Re: [PATCH] fix timeout handling with GRUB_HIDDEN_TIMEOUT=0

[Andrey Borzenkov <arvidjaar@gmail.com>]

Ping? This fixes actual problem - default /etc/default/grub shipped on
openSUSE included GRUB_HIDDEN_TIMEOUT=0 which means timeout gets
disabled after update.

Colin, I Cc you as author of original patch - what do you think?


В Sat,  7 Dec 2013 21:24:19 +0400
Andrey Borzenkov <arvidjaar@gmail.com> пишет:

> Before 44d488477902f0786d6bce44b74713f1713a34a9 combination of
> GRUB_HIDDEN_TIMEOUT=0 and GRUB_TIMEOUT!=0 resulted in normal menu with
> timeout. Now due to GRUB_HIDDEN_TIMEOUT taking precedence, it will always
> set timeout to 0 and immediately load default entry.
> 
> To ensure that update does not break existing configuration, refactor
> make_timeout code. We have
> 
> a) GRUB_TIMEOUT_STYLE set - assume new code
> b) GRUB_HIDDEN_TIMEOUT > 0 - use existing logic to set GRUB_TIMEOUT_STYLE to
> hidden|countdown
> c) GRUB_HIDDEN_TIMEOUT = 0 - set GRUB_TIMOUT_STYLE to menu
> 
> There is no need to have special case for GRUB_TIMEOUT_STYLE not set - it is the
> same as having it set to menu, so consolidate it with previous code.
> 
> ---
>  util/grub.d/00_header.in | 58 +++++++++++++++++++++++++-----------------------
>  1 file changed, 30 insertions(+), 28 deletions(-)
> 
> diff --git a/util/grub.d/00_header.in b/util/grub.d/00_header.in
> index d2e7252..0c82f23 100644
> --- a/util/grub.d/00_header.in
> +++ b/util/grub.d/00_header.in
> @@ -282,48 +282,50 @@ fi
>  
>  make_timeout ()
>  {
> -    if [ "x${1}${3}" != "x" ] ; then
> -	if [ "x${3}" != "x" ] ; then
> -	    timeout="${2}"
> -	    style="${3}"
> -	else
> -	    # Handle the deprecated GRUB_HIDDEN_TIMEOUT scheme.
> -	    timeout="${1}"
> -	    if [ "x${2}" != "x0" ] ; then
> -		grub_warn "$(gettext "Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.")"
> -	    fi
> -	    if [ "x${GRUB_HIDDEN_TIMEOUT_QUIET}" = "xtrue" ] ; then
> -		style="hidden"
> -	    else
> -		style="countdown"
> -	    fi
> +    if [ "x${3}" != "x" ] ; then
> +	timeout="${2}"
> +	style="${3}"
> +    elif [ "x${1}" != "x" -a "x${1}" != "x0" ] ; then
> +	# Handle the deprecated GRUB_HIDDEN_TIMEOUT scheme.
> +	timeout="${1}"
> +	if [ "x${2}" != "x0" ] ; then
> +	    grub_warn "$(gettext "Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.")"
>  	fi
> -	if [ "x${style}" = "xcountdown" ] ; then
> -	    verbose=" --verbose"
> -	else
> +	if [ "x${GRUB_HIDDEN_TIMEOUT_QUIET}" = "xtrue" ] ; then
> +	    style="hidden"
>  	    verbose=
> +	else
> +	    style="countdown"
> +	    verbose=" --verbose"
>  	fi
> -	cat << EOF
> +    else
> +	# No hidden timeout, so treat as GRUB_TIMEOUT_STYLE=menu
> +	timeout="${2}"
> +	style="menu"
> +    fi
> +    cat << EOF
>  if [ x\$feature_timeout_style = xy ] ; then
>    set timeout_style=${style}
>    set timeout=${timeout}
>  EOF
> -	if [ "x${style}" != "xmenu" ] ; then
> -	    cat << EOF
> +    if [ "x${style}" = "xmenu" ] ; then
> +	cat << EOF
> +# Fallback normal timeout code in case the timeout_style feature is
> +# unavailable.
> +else
> +  set timeout=${timeout}
> +EOF
> +    else
> +	cat << EOF
>  # Fallback hidden-timeout code in case the timeout_style feature is
>  # unavailable.
>  elif sleep${verbose} --interruptible ${timeout} ; then
>    set timeout=0
>  EOF
> -	fi
> -	cat << EOF
> +    fi
> +    cat << EOF
>  fi
>  EOF
> -    else
> -	cat << EOF
> -set timeout=${2}
> -EOF
> -    fi
>  }
>  
>  if [ "x$GRUB_BUTTON_CMOS_ADDRESS" != "x" ]; then