2009-09-05 02:08:05 +00:00
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cinit is a fast, small and simple init with support for profiles
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## Why should I use cinit?
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* To significant speedup the startup process
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* To use highest level of parallelisation at startup
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* To benefit from real dependencies (so called ***needs*** and ***wants***)
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* To easily create profiles that can be chosen at startup (even **before** init is started!)
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## How does cinit work?
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Cinit creates a dependency tree at startup and executes the services.
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A service can have two type of dependencies:
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* ***wants*** describe soft dependencies (i.e. it's not fatal if the wanted service fails to start)
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* ***needs*** describe hard dependencies (if the needed service fails, the depending won't be started)
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Let's have a look at an example:
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A
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(wants)
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/ \
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|------> B \ C
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| / \ / \
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^ (needs) (needs) (wants)
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| D E F
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| |
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|------<------(needs)----|
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Or in words:
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* B and C do not have dependencies
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* They will be started at the beginning
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* A wants B and C
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2009-09-05 02:58:31 +00:00
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* A waits until B and C are executed and started afterwards,
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independently of the success of B and C
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* A will also be started, if B and C fail to start.
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2009-09-05 02:08:05 +00:00
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* D needs B
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* D will only be started, if B is successfully started
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* E needs B and C
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* E will only be started, if both B and C are successfully started
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* F wants C and needs B
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* F will only be started, if B is successfully started
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* F waits until C is started and is started afterwards
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## Old homepage
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This will be the new homepage of cinit, as soon as the
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[old cinit homepage](http://unix.schottelius.org/cinit) is completly
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migrated into this one.
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## Getting cinit
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### Development versions
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You can get the latest (development) version via git:
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git clone git://git.schottelius.org/cLinux/cinit.git
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Additionally, the following other git ressources are available:
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* [Gitweb](http://git.schottelius.org/?p=cLinux/cinit.git;a=summary).
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* [Mirror at github](http://github.com/telmich/cinit)
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## Support
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* There is a general
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[cinit mailing list](http://l.schottelius.org/mailman/listinfo/cinit)
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available.
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* You can join the development ***IRC channel***
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[#cLinux on irc.freenode.org](irc://irc.freenode.org/#cLinux).
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2009-09-07 07:42:45 +00:00
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## Related websites
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* BSD init systems (same codebase):
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* <a href="http://www.freebsd.org/cgi/cvsweb.cgi/src/sbin/init/">FreeBSD</a>,
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* <a href="http://cvsweb.netbsd.org/bsdweb.cgi/src/sbin/init/">NetBSD</a>,
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* <a href="http://www.openbsd.org/cgi-bin/cvsweb/src/sbin/init/">OpenBSD</a>
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* <a href="http://www.initng.org/">initng</a>
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* <a href="http://www.fefe.de/minit/">minit</a>
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* <a href="http://smarden.org/runit/">runit</a>
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* <a href="ftp://ftp.cistron.nl/pub/people/miquels/sysvinit/">sysvinit</a>
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2009-09-05 02:08:05 +00:00
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[[!tag unix]]
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