Re: Execution of signed scripts received by e-mail
That sounds very impressive! The one problem I've run into with mail filtering software is that each message asynchronously spawns a separate filter process. This can cause some conflicts with accessing disk files. I haven't used procmail so I don't know if it has this problem. But if so you may need to be careful if there are any cases where two processes could be accessing the same disk files. For example, what if two copies of an identical email message arrive at almost the same time, would your dup detection work. The other issue is the possibility of mail arriving out of order. Looking for increasing timestamps may cause spurious rejection of some messages. On the other hand this is a difficult problem to handle in general so probably the current solution is OK. Hal
On Sat, 13 Jul 1996, Hal wrote:
That sounds very impressive! The one problem I've run into with mail
It's not new. I wrote a similar thing for executing shell scripts for EDS in 1986, except that I didn't have the means to digitally sign the email, so I put a header "X-Password:" with a password in it. Since the email was only going over a UUCP link, I felt pretty safe about it. Since the EDS machine (a Sun 2!) was calling me, that was the only way I had to execute commands and get results back. It was written in C, by the way, for a variety of reasons, even though perl was available (I am not a perl fan). -- Ed Carp, N7EKG ecarp@pobox.com 214/993-3935 voicemail/digital pager ** WeatherWatch, a division of Disaster Services - Garland, TX ** Owner: WeatherAlert, DSOUTH-L backup, Shamanism mailing lists
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