mirror of https://github.com/tLDP/LDP
46 lines
875 B
Bash
46 lines
875 B
Bash
#!/bin/bash
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# Try the following when invoking this script.
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# sh ex33a -a
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# sh ex33a -abc
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# sh ex33a -a -b -c
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# sh ex33a -d
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# sh ex33a -dXYZ
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# sh ex33a -d XYZ
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# sh ex33a -abcd
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# sh ex33a -abcdZ
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# sh ex33a -z
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# sh ex33a a
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# Explain the results of each of the above.
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E_OPTERR=65
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if [ "$#" -eq 0 ]
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then # Script needs at least one command-line argument.
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echo "Usage $0 -[options a,b,c]"
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exit $E_OPTERR
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fi
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set -- `getopt "abcd:" "$@"`
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# Sets positional parameters to command-line arguments.
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# What happens if you use "$*" instead of "$@"?
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while [ ! -z "$1" ]
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do
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case "$1" in
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-a) echo "Option \"a\"";;
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-b) echo "Option \"b\"";;
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-c) echo "Option \"c\"";;
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-d) echo "Option \"d\" $2";;
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*) break;;
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esac
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shift
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done
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# It is better to use the 'getopts' builtin in a script,
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#+ rather than 'getopt'.
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# See "ex33.sh".
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exit 0
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