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Top Forums Programming How to block or ignore signals from certain processes? Post 302234172 by otheus on Tuesday 9th of September 2008 08:56:46 AM
Old 09-09-2008
If you are that worried about security from other processes, you should instead set up a socket for all the processes to communicate through. And if you really want to do it right, each message contains a sequence number and a secret token of some sort. Of course, this won't prevent someone with root from attaching a debugger and reverse-engineering the protocol or finding the secret token.
 

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SRS(1p) 						User Contributed Perl Documentation						   SRS(1p)

NAME
srs - command line interface to Mail::SRS SYNOPSIS
srs --alias=alias@forwarder.com --secretfile=/etc/srs_secret sender@source.com DESCRIPTION
The srs commandline interface will create an instance of Mail::SRS with parameters derived from the commandline arguments and perform forward or reverse transformations for all addresses given. It is usually invoked from a sendmail envelope address transformation rule, a qmail alias, or similar. See http://www.anarres.org/projects/srs/ for examples. Arguments take the form --name or --name=value. ARGUMENTS
--separator String, specified at most once. Defaults to $SRSSEP ("="). Specify the initial separator for the SRS address. See Mail::SRS for details. --address String, may be specified multiple times, must be specified at least once. Specify a sender address to transform. --secret String, may be specified multiple times, at least one of --secret or --secretfile must be specified. Specify an SRS secret. The first specified secret is used for encoding. All secrets are used for decoding. --secretfile String, specified at most once, at least one of --secret or --secretfile must be specified. A file to read for secrets. Secrets are specified once per line. The first specified secret is used for encoding. Secrets are written one per line. Blank lines and lines starting with a # are ignored. If --secret is not given, then the secret file must be nonempty. --secret will specify a primary secret and override --secretfile if both are specified. However, secrets read from --secretfile will still be used for decoding if both are specified. --forward No argument. Specifies a forwards transformation. This is the default. --reverse must not also be given. --reverse No argument. Specifies a reverse transformation. --forward must not also be given. --alias String, must be specified exactly once if doing forwards transformation. Provides the alias address to which the mail was sent. The domain-part of this address is used in the generated SRS address. The local-part and @ are optional and may be omitted. --hashlength Integer, may be specified at most once, defaults to 4. Specify the number of base64 characters to use for the cryptographic authentication code. --help Print some basic help. SEE ALSO
Mail::SRS, http://www.anarres.org/projects/srs/ AUTHOR
Shevek CPAN ID: SHEVEK cpan@anarres.org http://www.anarres.org/projects/ COPYRIGHT
Copyright (c) 2004 Shevek. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.1 2004-06-23 SRS(1p)
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