Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
867 views
in Technique[技术] by (71.8m points)

bash - Option not recognized

I'm trying to use a case statement to determine if I have a legal command. It looks something like this:

function commandTest {
    case $1 in
    –score) echo "something";;
    *)      echo "unknown";;
    esac
}

Now if I use the function like this, it doesn't work. case doesn't recognize the string correctly although it is identical.

$ commandTest "-score"
unknown

What am I doing wrong here?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

As posted, your sample code has an en-dash (Unicode U+2013) in front of score, instead of a minus sign (ASCII 0x2D), which is preventing bash from matching the string -score

Switch:

–score) echo "something" 

to:

-score) echo "something" 

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...