47 lines
613 B
Bash
Executable File
47 lines
613 B
Bash
Executable File
#!/bin/bash
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FRIEND="world"
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usage() {
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cat <<- EOF
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Usage: $0 [OPTION]...
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Greets the given friend.
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With no friend provided, prints "Hello, world!"
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-f, --friend set the name of the friend to greet
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-h, --help print this help text
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EOF
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}
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# parse argv variables
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-f | --friend)
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FRIEND="$2"
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shift 2
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;;
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-f=* | --friend=*)
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FRIEND="${1#*=}"
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shift 1
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;;
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-h | --help)
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usage
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exit 0
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;;
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*)
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echo "Unrecognized argument ${1#*=}"
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echo
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usage
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exit 1
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;;
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esac
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done
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echo "Hello, $FRIEND!"
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