Shell/21T2_q11.sh at master · SuperShawnSi/Shell · GitHub

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#! /usr/bin/env dash

d1="$1"
d2="$2"

path1=$(mktemp)
path2=$(mktemp)

trap 'rm -f "$path1" "$path2"' EXIT

find "$d1" -type f | sed -E s"/^$d1\///" | sort | uniq > "$path1"
find "$d2" -type f | sed -E s"/^$d2\///" | sort | uniq > "$path2"

same_size=0
diff_size=0
only_1=0
only_2=0

while read -r path_from_1
do
    if grep -xq "$path_from_1" "$path2"
    then
        file1="$d1/$path_from_1"
        file2="$d2/$path_from_1"
        size1=$(ls -l "$file1" | tr -s " " | cut -d" " -f5)
        size2=$(ls -l "$file2" | tr -s " " | cut -d" " -f5)

        if [ "$size1" -eq "$size2" ]
        then
            same_size=$((same_size + 1))
        else
            diff_size=$((diff_size + 1))
        fi
    else
        only_1=$((only_1 + 1))
    fi
done < "$path1"

while read -r path_from_2
do
    if ! grep -xq "$path_from_2" "$path1"
    then
        only_2=$((only_2 + 1))
    fi
done < "$path2"

echo "$same_size $diff_size $only_1 $only_2"