2021-09-24 19:58:19 -07:00
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#!/usr/bin/env sh
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2024-07-22 05:28:58 -07:00
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# compat: +ash +bash +dash +zsh
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2021-07-29 00:37:35 -07:00
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2021-07-30 17:57:08 -07:00
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isup() { ### @-
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### return 0 if a given website returns a 2xx HTTP code.
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2021-08-02 06:06:13 -07:00
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###
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### ```
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### $ isup google.com && echo yay || echo nay
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### yay
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### $ isup fdhafdslkjgfjs.com && echo yay || echo nay
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### nay
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### ```
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2021-08-02 05:17:37 -07:00
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local c="$(curl -sLI -w '%{http_code}' -o /dev/null "$1")"
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[ -z "${c#2[0-9][0-9]}" ]
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2014-11-12 20:36:15 -08:00
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}
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2021-07-29 00:37:35 -07:00
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2021-08-02 13:48:46 -07:00
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[ -n "${preload+-}" ] || isup "$@"
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