shell 脚本，带名字的参数
参考： bash - Passing named arguments to shell scripts - Unix & Linux Stack Exchange
From 3.5.3 Shell Parameter Expansion of the GNU Bash manual:
${parameter:-word}
If parameter is unset or null, the expansion of word is substituted. Otherwise, the value of parameter is substituted.
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| #!/usr/bin/env bash
while [ $# -gt 0 ]; do
case "$1" in
-p|-p_out|--p_out)
p_out="$2"
;;
-a|-arg_1|--arg_1)
arg_1="$2"
;;
*)
printf "***************************\n"
printf "* Error: Invalid argument.*\n"
printf "***************************\n"
exit 1
esac
shift
shift
done
echo "Without default values:"
echo "p_out: ${p_out}"
echo "arg_1: ${arg_1}"
echo
echo "With default values:"
echo "p_out: ${p_out:-\"27\"}"
echo "arg_1: ${arg_1:-\"smarties cereal\"}"
|
调用方式
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| $ ./my-script.sh -a "lofa" -p "miez"
$ ./my-script.sh -arg_1 "lofa" --p_out "miez"
$ ./my-script.sh --arg_1 "lofa" -p "miez"
|