25 lines
370 B
Bash
25 lines
370 B
Bash
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#!/bin/bash
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#
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# Building a regular expression to match a simple-format ISO8601 date
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#
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re='^[0-9]{4}(-[0-9]{2}){2}$'
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#
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# The date is expected as the only argument
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#
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if [[ $# -ne 1 ]]; then
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echo "Usage: $0 ISO8601_date"
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exit 1
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fi
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#
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# Validate against the regex
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#
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if [[ $1 =~ $re ]]; then
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echo "$1 is a valid date"
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else
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echo "$1 is not a valid date"
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fi
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