This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
level ourself. We failed for unreadable directories. E.g.,
`mtree -d -f /etc/mtree/BSD.usr.dist -p /usr' run by `nobody' was
confused after it couldn't descend into /usr/games/hide. It looked
for /usr/include and subsequent directories in /usr/games.
Don't search for `extra' files when the spec depth is less than the
fts level. The spec depth isn't incremented for leaf nodes because
that would give a NULL level pointer and make it inconvenient to go
back to the parent level. Leaf nodes are built for directories that
are empty in the spec. Since they are empty in the spec, all files
in them are extra. The search looked for files one spec level
too high, so for `mtree -d -f /etc/mtree/BSD.usr.dist -p /usr',
obj/sbin matched ./sbin and wasn't considered extra, so it was
descended into and lots of bogus extra things in it were found.
This was harmful for `mtree -U' (as reported in pr623) and worse
for `mtree -r'.
Use rmdir(), not unlink(), to remove `extra' directories. unlink()
succeeds for root but unlinking directories normally damages the
file system.
Report `fts_errno' instead of `errno' when the former applies.
time. This caused differences in the nanosecond portion of the time to
screwup the logic and made mtree think it should compare the modtime even
though "time" wasn't specified. The end result is that mtree couldn't deal
with procfs because procfs sets the mtime with high accuracy via microtime().
2. Clean up code so it compiles -Wall (except for sccsid's and copyright).
This included fixing several printf formats that where not correct,
and changing the data types of a few things.
3. Implement new option -i that produces indented mtree output files.
4. Implement new option -n that turns off directory comments.
5. Only emit /set records if something has changed since the last one.
