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Add configure option to bypass boot menu if possible

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If other operating systems are installed, then automatically unhide the
menu.  Otherwise, if GRUB_HIDDEN_TIMEOUT is 0, then use keystatus if
available to check whether Shift is pressed.  If it is, show the menu,
otherwise boot immediately.  If keystatus is not available, then fall
back to a short delay interruptible with Escape.

This may or may not remain Ubuntu-specific, although it's not obviously
wanted upstream.  It implements a requirement of
https://wiki.ubuntu.com/DesktopExperienceTeam/KarmicBootExperienceDesignSpec#Bootloader.

If the previous boot failed (defined as failing to get to the end of one
of the normal runlevels), then show the boot menu regardless.

Author: Richard Laager <rlaager@wiktel.com>
Author: Robie Basak <robie.basak@ubuntu.com>
Forwarded: no
Last-Update: 2015-09-04

Patch-Name: quick-boot.patch
This commit is contained in:
Colin Watson 2014-01-13 12:13:28 +00:00 committed by Colin Watson
parent 11ea79546d
commit e760841d96
7 changed files with 141 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
configure.ac
View File

@ -1926,6 +1926,17 @@ else
fi
AC_SUBST([QUIET_BOOT])
AC_ARG_ENABLE([quick-boot],
[AS_HELP_STRING([--enable-quick-boot],
[bypass boot menu if possible (default=no)])],
[], [enable_quick_boot=no])
if test x"$enable_quick_boot" = xyes ; then
QUICK_BOOT=1
else
QUICK_BOOT=0
fi
AC_SUBST([QUICK_BOOT])
LIBS=""
AC_SUBST([FONT_SOURCE])

14
docs/grub.texi
View File

@ -1563,6 +1563,20 @@ This option may be set to a list of GRUB module names separated by spaces.
Each module will be loaded as early as possible, at the start of
@file{grub.cfg}.
@item GRUB_RECORDFAIL_TIMEOUT
If this option is set, it overrides the default recordfail setting. A
setting of -1 causes GRUB to wait for user input indefinitely. However, a
false positive in the recordfail mechanism may occur if power is lost during
boot before boot success is recorded in userspace. The default setting is
30, which causes GRUB to wait for user input for thirty seconds before
continuing. This default allows interactive users the opportunity to switch
to a different, working kernel, while avoiding a false positive causing the
boot to block indefinitely on headless and appliance systems where access to
a console is restricted or limited.
This option is only effective when GRUB was configured with the
@option{--enable-quick-boot} option.
@end table
The following options are still accepted for compatibility with existing

24
grub-core/normal/menu.c
View File

@ -603,6 +603,30 @@ run_menu (grub_menu_t menu, int nested, int *auto_boot)
static struct grub_term_coordinate *pos;
int entry = -1;
if (timeout == 0)
{
/* If modifier key statuses can't be detected without a delay,
then a hidden timeout of zero cannot be interrupted in any way,
which is not very helpful. Bump it to three seconds in this
case to give the user a fighting chance. */
grub_term_input_t term;
int nterms = 0;
int mods_detectable = 1;
FOR_ACTIVE_TERM_INPUTS(term)
{
if (!term->getkeystatus)
{
mods_detectable = 0;
break;
}
else
nterms++;
}
if (!mods_detectable || !nterms)
timeout = 3;
}
if (timeout_style == TIMEOUT_STYLE_COUNTDOWN && timeout)
{
pos = grub_term_save_pos ();

3
util/grub-mkconfig.in
View File

@ -256,7 +256,8 @@ export GRUB_DEFAULT \
GRUB_ENABLE_CRYPTODISK \
GRUB_BADRAM \
GRUB_OS_PROBER_SKIP_LIST \
GRUB_DISABLE_SUBMENU
GRUB_DISABLE_SUBMENU \
GRUB_RECORDFAIL_TIMEOUT
if test "x${grub_cfg}" != "x"; then
rm -f "${grub_cfg}.new"

77
util/grub.d/00_header.in
View File

@ -21,6 +21,8 @@ prefix="@prefix@"
exec_prefix="@exec_prefix@"
datarootdir="@datarootdir@"
grub_lang=`echo $LANG | cut -d . -f 1`
grubdir="`echo "/@bootdirname@/@grubdirname@" | sed 's,//*,/,g'`"
quick_boot="@QUICK_BOOT@"
export TEXTDOMAIN=@PACKAGE@
export TEXTDOMAINDIR="@localedir@"
@ -44,6 +46,7 @@ if [ "x${GRUB_TIMEOUT_BUTTON}" = "x" ] ; then GRUB_TIMEOUT_BUTTON="$GRUB_TIMEOUT
cat << EOF
if [ -s \$prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
EOF
@ -96,7 +99,50 @@ function savedefault {
save_env saved_entry
fi
}
EOF
if [ "$quick_boot" = 1 ]; then
cat <<EOF
function recordfail {
set recordfail=1
EOF
check_writable () {
abstractions="$(grub-probe --target=abstraction "${grubdir}")"
for abstraction in $abstractions; do
case "$abstraction" in
diskfilter | lvm)
cat <<EOF
# GRUB lacks write support for $abstraction, so recordfail support is disabled.
EOF
return
;;
esac
done
FS="$(grub-probe --target=fs "${grubdir}")"
case "$FS" in
btrfs | cpiofs | newc | odc | romfs | squash4 | tarfs | zfs)
cat <<EOF
# GRUB lacks write support for $FS, so recordfail support is disabled.
EOF
return
;;
esac
cat <<EOF
if [ -n "\${have_grubenv}" ]; then if [ -z "\${boot_once}" ]; then save_env recordfail; fi; fi
EOF
}
check_writable
cat <<EOF
}
EOF
fi
cat <<EOF
function load_video {
EOF
if [ -n "${GRUB_VIDEO_BACKEND}" ]; then
@ -282,10 +328,16 @@ fi
make_timeout ()
{
cat << EOF
if [ "\${recordfail}" = 1 ] ; then
set timeout=${GRUB_RECORDFAIL_TIMEOUT:-30}
else
EOF
if [ "x${3}" != "x" ] ; then
timeout="${2}"
style="${3}"
elif [ "x${1}" != "x" ] && [ "x${1}" != "x0" ] ; then
elif [ "x${1}" != "x" ] && \
([ "$quick_boot" = 1 ] || [ "x${1}" != "x0" ]) ; then
# Handle the deprecated GRUB_HIDDEN_TIMEOUT scheme.
timeout="${1}"
if [ "x${2}" != "x0" ] ; then
@ -304,26 +356,27 @@ make_timeout ()
style="menu"
fi
cat << EOF
if [ x\$feature_timeout_style = xy ] ; then
set timeout_style=${style}
set timeout=${timeout}
if [ x\$feature_timeout_style = xy ] ; then
set timeout_style=${style}
set timeout=${timeout}
EOF
if [ "x${style}" = "xmenu" ] ; then
cat << EOF
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=${timeout}
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=${timeout}
EOF
else
cat << EOF
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep${verbose} --interruptible ${timeout} ; then
set timeout=0
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep${verbose} --interruptible ${timeout} ; then
set timeout=0
EOF
fi
cat << EOF
fi
fi
EOF
}

4
util/grub.d/10_linux.in
View File

@ -22,6 +22,7 @@ exec_prefix="@exec_prefix@"
datarootdir="@datarootdir@"
ubuntu_recovery="@UBUNTU_RECOVERY@"
quiet_boot="@QUIET_BOOT@"
quick_boot="@QUICK_BOOT@"
. "$pkgdatadir/grub-mkconfig_lib"
@ -129,6 +130,9 @@ linux_entry ()
else
echo "menuentry '$(echo "$os" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnulinux-simple-$boot_device_id' {" | sed "s/^/$submenu_indentation/"
fi
if [ "$quick_boot" = 1 ]; then
echo " recordfail" | sed "s/^/$submenu_indentation/"
fi
if [ x$type != xrecovery ] ; then
save_default_entry | grub_add_tab
fi

21
util/grub.d/30_os-prober.in
View File

@ -20,12 +20,26 @@ set -e
prefix="@prefix@"
exec_prefix="@exec_prefix@"
datarootdir="@datarootdir@"
quick_boot="@QUICK_BOOT@"
export TEXTDOMAIN=@PACKAGE@
export TEXTDOMAINDIR="@localedir@"
. "$pkgdatadir/grub-mkconfig_lib"
found_other_os=
adjust_timeout () {
if [ "$quick_boot" = 1 ] && [ "x${found_other_os}" != "x" ]; then
cat << EOF
set timeout_style=menu
if [ "\${timeout}" = 0 ]; then
set timeout=10
fi
EOF
fi
}
if [ "x${GRUB_DISABLE_OS_PROBER}" = "xtrue" ]; then
grub_warn "$(gettext_printf "os-prober will not be executed to detect other bootable partitions.\nSystems on them will not be added to the GRUB boot configuration.\nCheck GRUB_DISABLE_OS_PROBER documentation entry.")"
exit 0
@ -45,6 +59,7 @@ if [ -z "${OSPROBED}" ] ; then
fi
osx_entry() {
found_other_os=1
if [ x$2 = x32 ]; then
# TRANSLATORS: it refers to kernel architecture (32-bit)
bitstr="$(gettext "(32-bit)")"
@ -168,6 +183,7 @@ for OS in ${OSPROBED} ; do
;;
esac
found_other_os=1
onstr="$(gettext_printf "(on %s)" "${DEVICE}")"
cat << EOF
menuentry '$(echo "${LONGNAME} $onstr" | grub_quote)' $CLASS --class os \$menuentry_id_option 'osprober-chain-$(grub_get_device_id "${DEVICE}")' {
@ -198,6 +214,7 @@ EOF
;;
efi)
found_other_os=1
EFIPATH=${DEVICE#*@}
DEVICE=${DEVICE%@*}
onstr="$(gettext_printf "(on %s)" "${DEVICE}")"
@ -246,6 +263,7 @@ EOF
[ "${prepare_boot_cache}" ] || continue
fi
found_other_os=1
onstr="$(gettext_printf "(on %s)" "${DEVICE}")"
recovery_params="$(echo "${LPARAMS}" | grep 'single\|recovery')" || true
counter=1
@ -322,6 +340,7 @@ EOF
fi
;;
hurd)
found_other_os=1
onstr="$(gettext_printf "(on %s)" "${DEVICE}")"
cat << EOF
menuentry '$(echo "${LONGNAME} $onstr" | grub_quote)' --class hurd --class gnu --class os \$menuentry_id_option 'osprober-gnuhurd-/boot/gnumach.gz-false-$(grub_get_device_id "${DEVICE}")' {
@ -364,3 +383,5 @@ EOF
;;
esac
done
adjust_timeout