On Friday 20 April 2007 11:30, Alan Cox wrote: > > As far as I can see, glibc internally looks at /proc/mounts (or else > > mtab) to find out where tmpfs is mounted for opening files there, and to > > look up filesystem information for statfs(), while accessing that path, > > too. Fstatfs() also looks into the same files, but it only matches by > > filesystem type, so this is only a very unreliable heuristic, anyway. > > > > So judging from that, glibc users should be fine. > > So glibc does use it and you will change behaviour Not for statfs(), shm_open(), and sem_open(). Possibly for fstatfs(): fstatfs() has no way of looking up mount points per path name in /proc/mounts, and so it resorts to mapping from the numeric statfs->f_type to the filesystem name (e.g., "ext3"), looks up the first mount point with that name, and sets the statfs->f_flag flags based on that entry. This field may change from one arbitrary value to another. Andreas - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
