Brent Casavant wrote: > On Wed, 12 Sep 2007, H. Peter Anvin wrote: > >> Brent Casavant wrote: > >>> http://marc.info/?l=linux-kernel&m=93032806224160&w=2 >> This link talks about file flags handling. I don't see the relevance to >> this problem at all. However, this is a very long thread, so if there >> is anything specific that you want to point to, then please elucidate. > > Oops, my mistake -- I pasted the wrong URL. I meant this thread, this > post in particular: > > http://marc.info/?l=linux-kernel&m=88937224115435&w=2 > > Still, O_NOLINK would seem to be a valuable addition, and greatly > simplify secure temporary file creation. >
Avoiding -- or at least detecting -- symlink racing with mkdir() is relatively simple: run mkdir(), make sure you don't get EEXIST or something like that, lstat() the resulting path -- it should be a directory with all the right modes and ownerships. I believe -- but I'm not certain -- that mkdtemp() in glibc will do all this for you. If not, I would consider that a glibc bug. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/