Kovács Zoltán
53 lines
1.4 KiB
Bash
Executable File
53 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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#
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# This is a sendmail to mailx format converter script.
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# It receives a well-formed email text from standard input, parses it,
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# and invokes a POSIX mailx compliant mail user agent with the result.
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#
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# It is primarily designed to use with crond. To activate
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# use CRONDARGS="-m pathname_to_cronmail" in/etc/default/cron or
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# /etc/sysconfig/crond configuration.
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#
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# Author: Kovács Zoltán <kovacsz@marcusconsulting.hu>
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# License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
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# 2026-05-02 v0.1 Initila release.
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# Initialisations.
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#
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SUBJECT=""
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RECIPIENT="$USER" # Default recipient.
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MESSAGE=""
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MUA="/usr/local/bin/mail" # Custom mail user agent script.
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# Parsing the stdin line by line.
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#
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while IFS= read -r line
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do
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# Parses the recipient.
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if [[ "$line" =~ ^(T|t)o:\ .*$ ]]; then
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RECIPIENT="${line#*: }"
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# Parses the subject line.
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elif [[ "$line" =~ ^(S|s)ubject:\ .*$ ]]; then
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SUBJECT="${line#*: }"
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# Message body starts with an empty line.
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elif [[ "$line" =~ ^$ ]]; then
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MESSAGE+="\n"
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# Collects the message body lines.
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# The first empty line will be stripped.
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elif [ -n "$MESSAGE" ]; then
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[[ "$MESSAGE" = "\n" ]] \
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&& MESSAGE="$line\n" \
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|| MESSAGE+="$line\n"
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fi
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done
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# Calls the mail user agent.
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#
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if [ -x "$MUA" ]; then
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if [ -n "$SUBJECT" -o -n "$MESSAGE" ]; then
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echo -e "$MESSAGE" | "$MUA" -s "$SUBJECT" "$RECIPIENT"
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fi
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fi
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# That's all, Folks! :)
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