busybox: implement suspend/resume SUSPEND_MODULES for systemd

This commit is contained in:
Stefan Saraev 2013-08-29 21:45:09 +03:00
parent 09f88b66e9
commit 17db0edc4b
3 changed files with 101 additions and 0 deletions

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@ -0,0 +1 @@
SUSPEND_MODULES="xhci-hcd jme asix anysee rtl8192se imon r8712u cx23885 cdc_acm"

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@ -48,6 +48,7 @@ USER_PWD="`$ROOT/$TOOLCHAIN/bin/cryptpw -m sha512 $USER_PASSWORD`"
cp $PKG_DIR/config/profile $INSTALL/etc
cp $PKG_DIR/config/inputrc $INSTALL/etc
cp $PKG_DIR/config/httpd.conf $INSTALL/etc
cp $PKG_DIR/config/suspend-modules.conf $INSTALL/etc
echo "chmod 000 $INSTALL/etc/shadow" >> $FAKEROOT_SCRIPT
mkdir -p $INSTALL/usr/config/sysctl.d

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@ -0,0 +1,99 @@
#!/bin/sh
################################################################################
# This file is part of OpenELEC - http://www.openelec.tv
# Copyright (C) 2009-2012 Stephan Raue (stephan@openelec.tv)
#
# This Program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This Program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenELEC.tv; see the file COPYING. If not, write to
# the Free Software Foundation, 51 Franklin Street, Suite 500, Boston, MA 02110, USA.
# http://www.gnu.org/copyleft/gpl.html
################################################################################
. /etc/suspend-modules.conf
modunload()
{
local MOD D C USED MODS I
local UNL="$(echo $1 |tr - _)" RET=1
while read MOD D C USED D; do
[ "$MOD" = "$UNL" ] || continue
if [ "$USED" = "-" ]; then
# no dependent modules, just try to remove this one.
_rmmod "$MOD" $C
RET=$?
else
# modules depend on this one. try to remove them first.
MODS=",${USED%,}"
while [ -n "${MODS}" ]; do
# try to unload the last one first
MOD="${MODS##*,}"
modunload $MOD && RET=0
# prune the last one from the list
MODS="${MODS%,*}"
done
# if we unloaded at least one module, then let's
# try again!
[ $RET -eq 0 ] && modunload $MOD
RET=$?
fi
return $RET
done < /proc/modules
# if we came this far, there was nothing to do,
# the module is no longer loaded.
return 0
}
_rmmod()
{
if modprobe -r "$1"; then
touch "/run/openelec/suspend/module:$1"
return 0
else
logger -t suspend-modules "# could not unload '$1', usage count was $2"
return 1
fi
}
resume_modules()
{
for x in /run/openelec/suspend/module:* ; do
[ -O "${x}" ] || continue
modprobe "${x##*:}" &>/dev/null && \
logger -t resume-modules "Reloaded module ${x##*:}." || \
logger -t resume-modules "Could not reload module ${x##*:}."
done
}
suspend_modules()
{
[ -z "$SUSPEND_MODULES" ] && return 0
# clean up
rm -rf /run/openelec/suspend
mkdir -p /run/openelec/suspend
for x in $SUSPEND_MODULES ; do
modunload $x && \
logger -t suspend-modules "Unloading kernel module $x: Done" || \
logger -t suspend-modules "Unloading kernel module $x: Failed"
done
return 0
}
case $1 in
pre)
suspend_modules
;;
post)
resume_modules
;;
esac