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#!/bin/bash
#
# Enable/disable debug code in DIGImend kernel drivers.
# Author: Nikolai Kondrashov <spbnick@gmail.com>
#
# 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 of the License, 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 this program. If not, see <http://www.gnu.org/licenses/>.
#
set -e -u -o pipefail
function usage() {
local progname=`basename "$0"`
echo "Usage: $progname STATUS"
echo "Enable/disable debug code in DIGImend kernel drivers,"
echo "making sure affected modules are loaded."
echo ""
echo "Arguments:"
echo " STATUS 1/on/enable to enable, 0/off/disable to disable"
echo ""
}
declare -r CONTROL_FILE="/sys/kernel/debug/dynamic_debug/control"
declare -r -a MODULE_LIST=("hid_uclogic")
if [ "$#" != 1 ]; then
echo "Invalid number of arguments" >&2
echo "" >&2
usage >&2
exit 1
fi
case "${1,,}" in
0|off|disable)
op="-"
;;
1|on|enable)
op="+"
;;
*)
echo "Unknown status: $1" >&2
echo "" >&2
usage >&2
exit 1
;;
esac
# Make sure modules are loaded, otherwise enabling will have no effect
if ! modprobe -a "${MODULE_LIST[@]}"; then
echo "Failed loading DIGImend modules." >&2
echo "Make sure they're installed, and you're root or using sudo." >&2
exit 1
fi
if ! [ -r "$CONTROL_FILE" -a -w "$CONTROL_FILE" ]; then
echo "Cannot access control file." >&2
echo "Make sure you're root or using sudo." >&2
exit 1
fi
for MODULE in "${MODULE_LIST[@]}"; do
echo "module ${MODULE} ${op}pmfl" > "$CONTROL_FILE"
done
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