Fossil SCM
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#!/usr/bin/tcl |
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# |
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# Monitor the database file named on the command line for |
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# incoming email messages. Print the "To:" line of each |
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# email on standard output as it is received. |
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# |
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# It should be relatively easy to modify this scribe to actually |
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# deliver the emails to a real email transfer agent such as |
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# Postfix. |
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# |
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# For long-term use, set the polling interval to something |
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# greater than the default 100 milliseconds. Polling once |
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# every 10 seconds is probably sufficient. |
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# |
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set POLLING_INTERVAL 100 ;# milliseconds |
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set dbfile [lindex $argv 0] |
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if {[llength $argv]!=1} { |
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puts stderr "Usage: $argv0 DBFILE" |
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exit 1 |
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} |
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package require sqlite3 |
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puts "SQLite version [sqlite3 -version]" |
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sqlite3 db $dbfile |
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db timeout 2000 |
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catch {db eval {PRAGMA journal_mode=WAL}} |
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db eval { |
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CREATE TABLE IF NOT EXISTS email( |
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emailid INTEGER PRIMARY KEY, |
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msg TXT |
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); |
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} |
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while {1} { |
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db transaction immediate { |
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set n 0 |
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db eval {SELECT msg FROM email} { |
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set email ??? |
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regexp {To: \S*} $msg to |
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puts "$to ([string length $msg] bytes)" |
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incr n |
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} |
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if {$n>0} { |
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db eval {DELETE FROM email} |
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} |
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# Hold the write lock a little longer in order to exercise |
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# the SQLITE_BUSY handling logic on the writing inside of |
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# Fossil. Probably comment-out this line for production use. |
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after 100 |
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} |
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after $POLLING_INTERVAL |
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} |
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