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README: s/initrd/initramfs

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Harald Hoyer 2011-05-12 11:01:59 +02:00
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@ -19,19 +19,19 @@ we'll grow some hooks for running arbitrary commands in the flow of
the script, but it's worth trying to resist the urge as much as we can the script, but it's worth trying to resist the urge as much as we can
as hooks are guaranteed to be the path to slow-down. as hooks are guaranteed to be the path to slow-down.


Most of the initrd generation functionality in dracut is provided by a bunch Most of the initramfs generation functionality in dracut is provided by a bunch
of generator modules that are sourced by the main dracut script to install of generator modules that are sourced by the main dracut script to install
specific functionality into the initrd. They live in the modules.d specific functionality into the initramfs. They live in the modules.d
subdirectory, and use functionality provided by dracut-functions to do their subdirectory, and use functionality provided by dracut-functions to do their
work. work.


Some general rules for writing modules: Some general rules for writing modules:
* Use one of the inst family of functions to actually install files * Use one of the inst family of functions to actually install files
on to the initrd. They handle mangling the pathnames and (for binaries, on to the initramfs. They handle mangling the pathnames and (for binaries,
scripts, and kernel modules) installing dependencies as appropriate so scripts, and kernel modules) installing dependencies as appropriate so
you do not have to. you do not have to.
* Scripts that end up on the initrd should be POSIX compliant. dracut * Scripts that end up on the initramfs should be POSIX compliant. dracut
will try to use /bin/dash as /bin/sh for the initrd if it is available, will try to use /bin/dash as /bin/sh for the initramfs if it is available,
so you should install it on your system -- dash aims for strict POSIX so you should install it on your system -- dash aims for strict POSIX
compliance to the extent possible. compliance to the extent possible.
* Hooks MUST be POSIX compliant -- they are sourced by the init script, * Hooks MUST be POSIX compliant -- they are sourced by the init script,