シェルスクリプトで、複数コマンドの実行結果を結合（AND OR XOR)するシェル関数

def-concat_commands.sh

#!/bin/bash
soniq(){
    sort | uniq $*
}
concat_commands() {
    # $1 … method ( and | or | xor )
    # $2 … command
    # $3 … command
    local _arg=""
    
    if [ "$1" = "and" ] ; then
        _arg="-d"
    fi
    if [ "$1" = "xor" ] ; then
        _arg="-u"
    fi
    
    ((eval "$2" | soniq) && (eval "$3" | soniq)) | soniq ${_arg}
}

test_def-concat_commands.sh

#!/bin/bash
source `dirname $0`/def-concat_commands.sh

# Simplae Test
cat > test1.txt <<++EOD
test1
test2
test3
test4
++EOD

cat > test2.txt <<++EOD
test2
test4
test5
test6
++EOD

echo [--- TEST DATA ---]
echo [IN1]
cat test1.txt
echo
echo [IN2]
cat test2.txt
echo

# ①論理和
echo [--- OR ---]
concat_commands or "cat test1.txt" "cat test2.txt"
echo count:`concat_commands or "cat test1.txt" "cat test2.txt" | wc -l`
echo

# ②論理積
echo [--- AND ---]
concat_commands and "cat test1.txt" "cat test2.txt"
echo count:`concat_commands and "cat test1.txt" "cat test2.txt" | wc -l`
echo

# ③排他的論理和
echo [--- XOR ---]
concat_commands xor "cat test1.txt" "cat test2.txt"
echo count:`concat_commands xor "cat test1.txt" "cat test2.txt" | wc -l`
echo

# ④左側ONLY
echo [--- IN1 ONLY ---]
concat_commands xor "cat test1.txt" 'concat_commands and "cat test1.txt" "cat test2.txt"'
echo count:`concat_commands xor "cat test1.txt" 'concat_commands and "cat test1.txt" "cat test2.txt"' | wc -l`
echo

rm test1.txt test2.txt