Created
September 9, 2020 06:45
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bash built in getopts example
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| #!/bin/bash | |
| opt_b=0 | |
| opt_c=0 | |
| scriptName=`basename $0` | |
| showUsage() { echo "Usage: $scriptName -a <3333|7777> [-b] [-c]" 1>&2; exit 1; } | |
| while getopts ":a:bc" opt; do | |
| case "${opt}" in | |
| a) | |
| opt_a=${OPTARG} | |
| ((opt_a == 3333 || opt_a == 7777)) || showUsage | |
| ;; | |
| b) | |
| opt_b=1 | |
| ;; | |
| c) | |
| opt_c="yes" | |
| ;; | |
| \?) | |
| echo "Invalid option: $OPTARG" 1>&2 | |
| exit 1; | |
| ;; | |
| :) | |
| echo "Invalid option: -$OPTARG requires an argument" 1>&2 | |
| exit 1; | |
| ;; | |
| esac | |
| done | |
| shift $((OPTIND-1)) | |
| # if [ -z "${opt_a}" ] || [ -z "${opt_b}" ]; then | |
| if [ -z "${opt_a}" ]; then | |
| showUsage | |
| fi | |
| echo "Results:" | |
| echo "a = ${opt_a}" | |
| echo "b = ${opt_b}" | |
| echo "c = ${opt_c}" |
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