[uml-devel] temp disk space usage

[Adam H. <do...@de...>]

I started using user-mode-linux yesterday after 6 months, and was quite
impressed with what has been accomplished.  However, there is a big problem,
that could actually cause a DoS.

UML places all files in /tmp.  Both temporary vm files, and pid/mconsole
files.  The latter are not that big a problem(ssh does the same thing).  The
former, however, is very bad.

I have /tmp on /, which is only 100 megs.  When I reran uml-linux(my own
compiled version), I suddenly ran out of disk space.  However, du didn't show
the files(lsof did).  My fix was to remove the hard-coded directory from the
code, which means that mkstemp would place them in $CWD.

Wouldn't it be better to honor $TMP or $TEMP?