I've assembled some notes from old manuals and other sources
on the formats used for on-disk file systems through the
Additional notes, comments on style, and whatnot are welcome.
(It may be sensible to send anything in the last two categories
directly to me, rather than to the whole list.)
I was doing a trawl of related Unix source trees, and found that some early
C code from around 2nd Edition Unix is still in OpenSolaris today:
Choose: Compare this file to OpenSolaris_b135/cmd/fmli/sys/test.c
and then click on the Side Scroll or the Printable button.
There's about 15 lines of code in common between the 2 files.