| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798 | #!/bin/bash
MODE=$(ls -l /boot/grub/grub.cfg | awk '{print $1}')
if [ "$(printf "%c" "$MODE")" == "-" ];then  #First char at MODE(----------)
        :   
else
        exit 1
fi
TEMP=${MODE#?}                 #remove first char at MODE and save at $TEMP
printf "%c" "$TEMP" | grep -w "^r$\|^-$"
if [ $? -eq 0 ];then
        :   
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^w$\|^-$"
if [ $? -eq 0 ];then
        :   
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :   
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :   
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :
else
        exit 1
fi
TEMP=${TEMP#?}
printf "%c" "$TEMP" | grep -w "^-$"
if [ $? -eq 0 ];then
        :
else
        exit 1
fi
 |