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Joshua Watt 96e05ff4ce initscripts: Update volatiles documentation to include binds

Volatiles processing now handles bind mounts, so update the comment in
the core file to indicate this.

(From OE-Core rev: 520e8f5721aab90815186533038c2f9f834546d5)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2019-02-19 16:14:57 +00:00

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This configuration file lists filesystem objects that should get verified

during startup and be created if missing.

Entries have the following format:

where the items are separated by whitespace !

The # character introduces a comment lasting until end of line.

Blank lines are ignored.

: d|f|l|b : (d)irectory|(f)ile|(l)ink|(b)ind

A linking example:

l root root 0777 /var/test /tmp/testfile

f root root 0644 /var/test none

Understanding links:

When populate-volatile is to verify/create a directory or file, it will first

check it's existence. If a link is found to exist in the place of the target,

the path of the target is replaced with the target the link points to.

Thus, if a link is in the place to be verified, the object will be created

in the place the link points to instead.

This explains the order of "link before object" as in the example above, where

a link will be created at /var/test pointing to /tmp/testfile and due to this

link the file defined as /var/test will actually be created as /tmp/testfile.

d root root 1777 /run/lock none d root root 0755 /var/volatile/log none d root root 1777 /var/volatile/tmp none l root root 1777 /var/lock /run/lock l root root 0755 /var/run /run l root root 1777 /var/tmp /var/volatile/tmp l root root 1777 /tmp /var/tmp d root root 0755 /var/lock/subsys none f root root 0664 /var/log/wtmp none f root root 0664 /var/run/utmp none l root root 0644 /etc/resolv.conf /var/run/resolv.conf f root root 0644 /var/run/resolv.conf none

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