sKit-tweaks

#!/bin/sh
#
# soundcheck's tuning kit - pCP  - sKit-tweaks
# activates advanced system configurations
# for RPi4 and related CM modules
#
# Latest Update: Aug-07-2021
#
#
# Copyright © 2021 - Klaus Schulz
# All rights reserved
# 
# 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 3 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
#
########################################################################
VERSION=1.3
sKit_VERSION=1.5

fname="${0##*/}"
opts="$@"

###functions############################################################
out() {

    echo -e "\tprogram aborted" >>$LOG
    echo -e "\t${RED}ERROR: $@ ${NC}" >>$LOG
    exit 1
}


license() {

    echo "
    soundcheck's tuning kit (${fname})
    
    Copyright © 2021 - Klaus Schulz (aka soundcheck)
    All rights reserved

    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 3 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
    " >>$LOG
}


env_set() {

    BOOT_DEV=/dev/mmcblk0p1 
    BOOT_MNT=/mnt/mmcblk0p1
    ROOT_DEV=/dev/mmcblk0p2
    ROOT_MNT=/mnt/mmcblk0p2


    TCE="$ROOT_MNT/tce"
    sKitbase=$TCE/sKit
    LOGDIR=$sKitbase/log
    LOG=$LOGDIR/$fname.log

    TIMEOUT="180"

    
    CPU_AFFINITY=0x6
}


set_log() {

    echo >$LOG
}


check_pcp() {

    if ! uname -a | grep -q -i pcp; then 
    
        out "No piCorePlayer system"
       
    fi
}


check_custom_squeezelite() {

    [[ ! -f /mnt/mmcblk0p2/tce/squeezelite-custom ]] && out "custom squeezelite installation missing" 
}


set_sl_affinity() {

    for i in $(ps -eLo tid,comm,command | grep squeezelite-custom | grep -v "output_alsa" | grep -v grep | awk '{print $1}'); do

        sudo taskset -p $CPU_AFFINITY $i >>$LOG

    done
}


stop_idlenet() {

    ACTIF=$(route | grep '^default' | grep -o '[^ ]*$')
    if [[ "$ACTIF" == "eth0" ]]; then

        sudo ifconfig wlan0 down >>$LOG
         
    elif [[ "$ACTIF" == "wlan0" ]]; then
    
        sudo ifconfig eth0 down >>$LOG

    fi
}


stop_procs() {

    procs='httpd ssh udhcpc pcpmdnsd'

    sleep $TIMEOUT

    for i in $procs; do

        sudo pkill -f $i >>$LOG

    done
}


log_stat() {

    ps -Leo rtprio,pri,psr,pid,tid,comm,cmd >>$LOG
    ifconfig >>$LOG
}


clear_cache() {

    sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"
}



#MAINMAIN##################################
check_pcp
env_set
set_log
check_custom_squeezelite
license
set_sl_affinity
stop_idlenet
stop_procs
log_stat
clear_cache

exit 0
###########################################