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Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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Lepl parser for Python.

Colorless Green.

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SVG experiment.

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Calibration of seismometers.

Data access via web services.

Cache rewrite.

Extending OpenSSH.

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Time-switching Procmailrc Recipe

From: andrew cooke <andrew@...>

Date: Wed, 7 Mar 2012 21:30:06 -0300

This is really ugly, but it's simple and appears to work.

Take two files - .procmailrc-foo-on and .procmailrc-foo-off - and place in
them the procmail commands you want to switch between.  For example, you might
want to filter work-related emails over the weekend so that they go into a
separate folder; that might be in .procmailrc-foo-off while .procmailrc-foo-on
remains blank.

Next, in crontab, define two commands:

  x x x x x rm /home/andrew/.procmailrc-foo; \
   ln -s /home/andrew/.procmailrc-foo-on /home/andrew/.procmailrc-foo

  x x x x x rm /home/andrew/.procmailrc-foo; \
   ln -s /home/andrew/.procmailrc-foo-off /home/andrew/.procmailrc-foo

(those are each single line commands, wrapped for this blog).  One turns the
filter "on" and the other "off" by updating the link.

Finally, in your .procmailrc, include


And the message filtering will swap as required.  There's an unfortunate "gap"
when the switching occurs, but at least in my case I time that to not
conincide with the email download heartbeat from my ISP.


Small Corrections

From: andrew cooke <andrew@...>

Date: Wed, 7 Mar 2012 21:54:35 -0300

1 - You need the absolute path in the INCLUDERC (at least, that makes life

2 - If INCLUDERC can't find the file, procmail continues just fine, so if one
    of the two files you are switching between is empty, you could just delete
    the link.


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