94 lines
2.4 KiB
Bash
94 lines
2.4 KiB
Bash
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 2009-2014 Stephan Raue (stephan@openelec.tv)
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if [ -f /storage/.config/suspend-modules.conf ]; then
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. /storage/.config/suspend-modules.conf
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custom_modules="${SUSPEND_MODULES}"
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SUSPEND_MODULES=""
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fi
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. /etc/suspend-modules.conf
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if [ -n "${custom_modules}" ]; then
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SUSPEND_MODULES="${SUSPEND_MODULES} ${custom_modules}"
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fi
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modunload()
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{
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local MOD D C USED MODS I
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local UNL="$(echo $1 |tr - _)" RET=1
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while read MOD D C USED D; do
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[ "$MOD" = "$UNL" ] || continue
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if [ "$USED" = "-" ]; then
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# no dependent modules, just try to remove this one.
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_rmmod "$MOD" $C
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RET=$?
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else
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# modules depend on this one. try to remove them first.
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MODS=",${USED%,}"
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while [ -n "${MODS}" ]; do
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# try to unload the last one first
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MOD="${MODS##*,}"
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modunload $MOD && RET=0
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# prune the last one from the list
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MODS="${MODS%,*}"
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done
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# if we unloaded at least one module, then let's
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# try again!
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[ $RET -eq 0 ] && modunload $MOD
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RET=$?
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fi
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return $RET
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done < /proc/modules
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# if we came this far, there was nothing to do,
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# the module is no longer loaded.
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return 0
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}
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_rmmod()
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{
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if modprobe -r "$1"; then
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touch "/run/libreelec/suspend/module:$1"
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return 0
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else
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logger -t suspend-modules "# could not unload '$1', usage count was $2"
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return 1
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fi
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}
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resume_modules()
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{
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for x in /run/libreelec/suspend/module:* ; do
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[ -O "${x}" ] || continue
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modprobe "${x##*:}" &>/dev/null && \
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logger -t resume-modules "Reloaded module ${x##*:}." || \
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logger -t resume-modules "Could not reload module ${x##*:}."
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done
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}
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suspend_modules()
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{
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[ -z "$SUSPEND_MODULES" ] && return 0
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# clean up
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rm -rf /run/libreelec/suspend
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mkdir -p /run/libreelec/suspend
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for x in $SUSPEND_MODULES ; do
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modunload $x && \
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logger -t suspend-modules "Unloading kernel module $x: Done" || \
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logger -t suspend-modules "Unloading kernel module $x: Failed"
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done
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return 0
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}
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case $1 in
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pre)
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suspend_modules
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;;
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post)
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resume_modules
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;;
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esac
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