On 2/12/11 7:45 PM, [email protected] wrote:
Tim Kientzle<[email protected]> wrote:
The strategy used by libarchive's recent ISO writer
is to concatenate the file bodies into a temp file
(with minimal padding between entries to meet alignment
requirements) while storing directory information
in memory. The final output then consists of the
directory information followed by the concatenated
file bodies.
I suspect a similar strategy could be used to lay
out and write a read-only optimized UFS image ...
I think it's probably feasible but I doubt very
much of the existing UFS code can be recycled for
such a project.
There was at one time a capability in mkfs(8) -- which no
longer even exists as a separate entity, having been absorbed
into newfs(8) -- to pre-populate the filesystem with specified
content. Dunno if it was ever in any BSD release -- it's not
mentioned in the 4.2BSD-derived SunOS 4.1.1 manpage -- so
I may be remembering it from Bell Labs 6th edition on the PDP-11.
man makefs
The code to collect and write all of an existing filesystem's
directories, followed by all of its files, exists in dump(8).
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