2021-08-09 23:45:07 +00:00
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#!/bin/bash
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2021-07-24 12:58:02 +00:00
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set -e
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# check dependencies
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count=0
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for dependency in curl tr cut grep sed sort tail; do
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if [ ! -x "$(command -v $dependency)" ]; then
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echo "$dependency missing"
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count=$((count+1))
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fi
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done
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# exit script if any dependencies missing
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if [ $count -ne 0 ]; then
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exit 1
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fi
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# upstream URL
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UPSTREAM_URL="ftp://ftp.sendmail.org/pub/sendmail/"
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# options to pass to cURL, including custom user agent
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USER_AGENT="sendmail-version-checker/1.0 george@rawlinson.net.nz"
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CURL_OPTS=(--ftp-pasv --silent --user-agent "$USER_AGENT")
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curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" | tr -s ' ' | cut -d ' ' -f 9 | grep -E "sendmail\..+\.tar\.gz\.sig$" | sed -e 's/^sendmail\.//' -e 's/\.tar\.gz\.sig$//' | sort -n | tail -n 1
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exit 0
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