sievec - Pigeonhole's Sieve script compiler
sievec [options] script-file [out-file]
The sievec command is part of the Pigeonhole Project (pigeonhole(7)), which adds Sieve (RFC 5228) support to the Dovecot secure IMAP and POP3 server (dovecot(1)). Using the sievec command, Sieve scripts can be compiled into a binary representation. The resulting binary can be used directly to process e-mail messages during the delivery process. The delivery of mail messages and - by means of the LDA Sieve plugin - also the execution of Sieve scripts is performed by Dovecot's local delivery agent (LDA) called dovecot-lda(1). Usually, it is not necessary to compile the Sieve script manually using sievec, because dovecot-lda will do this automatically if the binary is missing. However, in some cases dovecot-lda does not have permission to write the compiled binary to disk, forcing it to recompile the script every time it is executed. Using the sievec tool, this can be performed manually by an authorized user to increase performance. The Pigeonhole Sieve implementation recognizes files with a .sieve extension as Sieve scripts and corresponding files with a .svbin extension as the associated compiled binary. This means for example that Dovecot's LDA process will first look for a binary file "dovecot.svbin" when it needs to execute "dovecot.sieve". It will compile a new binary when it is missing or outdated. The sievec command is also useful to verify Sieve scripts before using. Additionally, with the -d option it can output a textual (and thus human-readable) dump of the generated Sieve code to the specified file. The output is then identical to what the sieve-dump(1) command produces for a stored binary file. This output is mainly useful to find bugs in the compiler that yield corrupt binaries.
-c config-file Alternative Dovecot configuration file path. -d Don't write the binary to out-file, but write a textual dump of the binary instead. In this context, the out-file value '-' has special meaning: it causes the the textual dump to be written to stdout. The out-file argument may also be omitted, which has the same effect as '-'. The output is identical to what the sieve-dump(1) command produces for a compiled Sieve binary file. Note that this option is not allowed when the out-file argument is a directory. -D Enable Sieve debugging. -o setting=value Overrides the configuration setting from /etc/dovecot/dovecot.conf and from the userdb with the given value. In order to override multiple settings, the -o option may be specified multiple times. -u user Run the Sieve script for the given user. When omitted, the command will be executed with the environment of the currently logged in user. -x extensions Set the available extensions. The parameter is a space-separated list of the active extensions. By prepending the extension identifiers with + or -, extensions can be included or excluded relative to the configured set of active extensions. If no extensions have a + or - prefix, only those extensions that are explicitly listed will be enabled. Unknown extensions are ignored and a warning is produced. For example -x "+imapflags -enotify" will enable the deprecated imapflags extension and disable the enotify extension. The rest of the active extensions depends on the sieve_extensions and sieve_global_extensions settings. By default, i.e. when sieve_extensions and sieve_global_extensions remain unconfigured, all supported extensions are available, except for deprecated extensions or those that are still under development.
script-file Specifies the script to be compiled. If the script-file argument is a directory, all files in that directory with a .sieve extension are compiled into a corresponding .svbin binary file. The compilation is not halted upon errors; it attempts to compile as many scripts in the directory as possible. Note that the -d option and the out-file argument are not allowed when the script-file argument is a directory. out-file Specifies where the (binary) output is to be written. This argument is optional. If this argument is omitted, a binary compiled from <scriptname>.sieve is saved as <scriptname>.svbin. If this argument is omitted and -b is specified, the binary dump is output to stdout.
sievec will exit with one of the following values: 0 Compile was successful. (EX_OK, EXIT_SUCCESS) 1 Operation failed. This is returned for almost all failures. (EXIT_FAILURE) 64 Invalid parameter given. (EX_USAGE)
/etc/dovecot/dovecot.conf Dovecot's main configuration file. /etc/dovecot/conf.d/90-sieve.conf Sieve interpreter settings (included from Dovecot's main configuration file)
Report bugs, including doveconf -n output, to the Dovecot Mailing List <dovecot@dovecot.org>. Information about reporting bugs is available at: http://dovecot.org/bugreport.html
dovecot(1), dovecot-lda(1), sieve-dump(1), sieve-filter(1), sieve-test(1), pigeonhole(7)
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.