Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.1k views
in Technique[技术] by (71.8m points)

linux - Multiple option arguments using getopts (bash)

I am trying to process command line arguments using getopts in bash. One of the requirements is for the processing of an arbitrary number of option arguments (without the use of quotes).

1st example (only grabs the 1st argument)

madcap:~/projects$ ./getoptz.sh -s a b c
-s was triggered
Argument: a

2nd example (I want it to behave like this but without needing to quote the argument"

madcap:~/projects$ ./getoptz.sh -s "a b c"
-s was triggered
Argument: a b c

Is there a way to do this?

Here's the code I have now:

#!/bin/bash
while getopts ":s:" opt; do
    case $opt in
    s) echo "-s was triggered" >&2
       args="$OPTARG"
       echo "Argument: $args"
       ;;
   ?) echo "Invalid option: -$OPTARG" >&2
       ;;
    :) echo "Option -$OPTARG requires an argument." >&2
       exit 1
       ;;
    esac
done
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 Reply

0 votes
by (71.8m points)

I think what you want is to get a list of values from a single option. For that, you can repeat the option as many times as needed, and add it's argument to an array.

#!/bin/bash

while getopts "m:" opt; do
    case $opt in
        m) multi+=("$OPTARG");;
        #...
    esac
done
shift $((OPTIND -1))

echo "The first value of the array 'multi' is '$multi'"
echo "The whole list of values is '${multi[@]}'"

echo "Or:"

for val in "${multi[@]}"; do
    echo " - $val"
done

The output would be:

$ /tmp/t
The first value of the array 'multi' is ''
The whole list of values is ''
Or:

$ /tmp/t -m "one arg with spaces"
The first value of the array 'multi' is 'one arg with spaces'
The whole list of values is 'one arg with spaces'
Or:
 - one arg with spaces

$ /tmp/t -m one -m "second argument" -m three
The first value of the array 'multi' is 'one'
The whole list of values is 'one second argument three'
Or:
 - one
 - second argument
 - three

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…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...