adb pull serial files

#!/bin/bashdevicesName=$1usesu=$2pid=""if [[ $usesu = "" ]];thenadb shell "ls -l /mnt/sdcard/ucloud/dump*"adb shell "ls -l /mnt/sdcard/ucloud/dump*" > dumpfiles.txtelseadb shell su -c "ls -l /mnt/sdcard/ucloud/dump*"adb shell su -c "ls -l /mnt/sdcard/ucloud/dump*" > dumpfiles.txtfi#Mi pad output with \r need to be dos2unixdos2unix dumpfiles.txtawk '{print $7}' dumpfiles.txt > dumpfiles2.txtread -p "choose which to pull:"  valif [[ $val = "a" ]];then    cat dumpfiles2.txt | while read myline    do      echo "pull /mnt/sdcard/ucloud/$myline"      adb pull /mnt/sdcard/ucloud/$myline ~/Templates/      #if echo "$myline" >/dev/null ;then      #  echo "pull /mnt/sdcard/ucloud/$myline"      #  adb pull "/mnt/sdcard/ucloud/$myline" ~/Templates/      #fi    doneelse    adb pull "/mnt/sdcard/ucloud/$val" ~/Templates/fi