if 文 sample
if [ $# -ne 1 ];then
echo "Usage: $0 [123]";
exit 1;
fi
if [ $1 -eq 1 ];then
echo "You are number#1.";
elif [ $1 -eq 2 ];then
echo "You are number#2.";
elif [ $1 -eq 3 ];then
echo "You are number#3.";
else
echo "Invalid argument.";
echo "Usage: $0 [123]";
fi
for 文 sample
Shell Script
for i in `seq 1 5`
do
echo $i
done
One liner
for i in `seq 1 5`;do echo $i;done
外部ファイル読み込み処理
while read line;
do
// 各行ごとに何らかの処理を実施。
// 読み込んだ行は line に格納されている。
done < $TARGET_FILE
substring
function substring(){
if [ $2 -lt 1 ];then
echo "Usage: 2nd argument should be bigger than 1.";
exit 1;
elif [ $2 -gt $3 ];then
echo "Usage: 3rd argument should be bigger than 2nd argument.";
exit 1;
elif [ $# -ne 3 ];then
echo "$0 requires 3 arguments.";
echo "1st argument is a string.";
echo "2nd argument is a start point to cut.";
echo "3rd argument is a last point to cut.";
exit 1;
fi
result=`echo $1 | cut -c $2-$3`
echo $result
}