Headless Raspberry Pi

Headless raspberry pi.sh

#!/bin/bash

IMAGE=$1
BOOT_POINT="/tmp/raspberrypi/boot"
ROOT_POINT="/tmp/raspberrypi/root"
CONNECTION="/etc/NetworkManager/system-connections/*"

mkdir -p $BOOT_POINT 
mkdir -p $ROOT_POINT

mount () {
    
    #Sektor baslangic noktlari
    START=( `fdisk -l $IMAGE | tail -n 2 | awk '{print $2}'` )
    
    #Sektor bitis noktalari
    END=(   `fdisk -l $IMAGE | tail -n 2 | awk '{print $4}'` )

    #byte cinsinden hesapla  1 sektor == 512 byte
    BOOT=`echo  "${START[0]} * 512" | bc`
    BSIZE=`echo "${END[0]} * 512"   | bc`

    ROOT=`echo "${START[1]} * 512"  | bc`
    RSIZE=`echo "${END[1]} * 512"   | bc`

    sudo mount -o offset=${BOOT},sizelimit=${BSIZE} -t vfat $IMAGE $BOOT_POINT 
    sudo mount -o offset=${ROOT},sizelimit=${RSIZE} -t ext4 $IMAGE $ROOT_POINT
}

umount () {
    
    sudo umount $BOOT_POINT 
    sudo umount $ROOT_POINT

    rm -r $BOOT_POINT/.. 
    #rm -r $ROOT_POINT 

}

autologin () {
    #/dev/tty1 ucbirimi otomotik baslatilir
    echo "
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin pi --noclear %I $TERM
" > autologin.conf 
   
    sudo mv autologin.conf  $ROOT_POINT/etc/systemd/system/getty@tty1.service.d/
}

write () {

    lsblk -pSn  -o NAME,TRAN 
    USB=( `lsblk -pSn  -o NAME,TRAN | grep usb | awk '{print $1}'` )

    if [ ${#USB[@]} -eq 0 ]; then
        echo "Takili usb bulunamadi!"
        return
    fi 

    echo "Tarafini sec..."

    for ((i=0; i<${#USB[@]}; i++)) do
            
         printf "$i ==> ${USB[$i]} \n" ;
    done

    read  -n 1  i

    if [[ $i =~ ^-?[0-9]+$ ]] && [ $i -lt ${#USB[@]} ]; then
       
       #Secilen usb'ye yaz.
       sudo dd if=$IMAGE of=${USB[$i]} status=progress
    fi
    
}

ssh() {

   sudo mkdir -p $BOOT_POINT/ssh 
}

wireless () {


IFS=';'
CONN="/etc/NetworkManager/system-connections"

echo "ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
country=TR
update_config=1" > wpa_supplicant.conf

for i in  `ls -t  $CONN  | tr '\n' ';'`; do
    psk=`sudo cat $CONN/$i | grep 'psk='`;
    if  [ "$psk" ]; then
        ssid=`sudo cat $CONN/$i | grep 'ssid='`;
        if ( echo $saved | grep $ssid &>/dev/null ) then
            continue;
        else

        echo "
            network={
                $ssid
                $psk
            }
        "
        saved=( $saved $ssid )
        fi;
    fi;
done  | sed -e 's/ssid=\(.*\)/ssid=\"\1\"/g' -e  's/psk=\(.*\)/psk=\"\1\"/g'>> wpa_supplicant.conf

    sudo mv wpa_supplicant.conf $BOOT_POINT

}

#TEST
mount
wireless
autologin 
ssh 
umount
write