On Thu, 2003-10-30 at 22:33, Ruben de Groot wrote: > On Thu, Oct 30, 2003 at 07:54:07AM -0800, andi payn typed: > > [...] > > > * I think (but I'm not sure) that kevent doesn't notify at all if the > > only change to a file is its ATIME. If I'm right, this makes kevent > > completely useless for fam. Adding a NOTE_ACCESS or something similar > > would fix this.
> Wouldn't NOTE_ATTRIB (EVFILT_VNODE) do what you want? That was my first guess, but I first tested it with wait_on (before sending the original email), and have since tested it directly, and apparently you don't get NOTE_ATTRIB notifications just because the ATIME changes. As far as I can tell, there is no way to get notifications on only the ATIME changing. Now, if everyone seems to write the manpage as implying that NOTE_ATTRIB should in fact get triggered by a change in the ATIME, maybe the right solution is to make this true. However, I could easily see that breaking existing code. That's why I suggested adding a new NOTE_ACCESS instead. To see for yourself, here's the simplest possible test: # touch /tmp/file # ls -lu /tmp/file -rw------- 1 andi users 0 Oct 31 11:29 /tmp/file # wait_on -h /tmp/file > /tmp/out & # cat /tmp/file # cat /tmp/out # ls -lu /tmp/file -rw------- 1 andi users 0 Oct 31 11:30 /tmp/file # touch /tmp/file [1]+ Exit 4 wait_on -h /tmp/file > /tmp/out # cat /tmp/out /tmp/file: attributed In other words, changing the ATIME (e.g., with cat) does not trigger NOTE_ATTRIB; changing the MTIME (e.g., with touch), does. _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
