after playing with openwrt's mini_fo filesystem for a while, i'm
puzzled by its behaviour. as an experiment, i tested what it would
take for mini_fo to create a "copy" of a file under /jffs. obviously,
modifying a file in any way would require that. but i also tested
several commands that just *examined* the file, and here are the
results of which commands would create a copy of a file:
cat no
less no
ls -l no
touch no
vi -R no
vi yes (??)
i'm puzzled by that last one since all i did was open a file with
vi, then immediately close it without making any changes. but it
*reliably* would make a copy under /jffs every time. why? i haven't
changed the file in any way. what is it about invoking vi on a file
that requires mini_fo to copy it? i just don't see the rationale
there. thanks.
rday
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
Have classroom, will lecture.
http://crashcourse.ca Waterloo, Ontario, CANADA
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