How can you stat /proc/mount and test for a change since the times aren't maintained on a /proc fs?
However you can test for a filesize change if they preserved the last file size - which they do the last mtime. So if that don't want to use fam, they could poll /proc/mount with stat and test for a size change.
Nah... size doesn't change either. Don't know what I was thinking when I defended the idea of stat'ing that file. Sounds like the best thing is to push for fstat() on an fd to /etc/mtab. I'll just be quiet now.
