* Miklos Szeredi: > Attaching the proposed man page for listing mounts (based on the new > listmount() syscall). > > The raw interface is: > > syscall(__NR_listmount, const struct mnt_id_req __user *, req, > u64 __user *, buf, size_t, bufsize, unsigned int, flags); > > The proposed libc API is. > > struct listmount *listmount_start(uint64_t mnt_id, unsigned int flags); > uint64_t listmount_next(struct listmount *lm); > void listmount_end(struct listmount *lm); > > I'm on the opinion that no wrapper is needed for the raw syscall, just > like there isn't one for getdents(2). We do have a wrapper for getdents64. It's useful because if you modify the directory, you care about the buffer boundary because you should rewind after processing the current buffer. The inotify facility also exposes a sequence of variably sized objects to applications, but does not add a new system call for that. That's just an aside, though. The existing functions dealing with /proc/mounts or /etc/fstab are called setmntent, getmntent or getmntment_r (the former with a bad implementation, the latter with a bad interface), and endmntent. This follows the pattern of NSS enumeration interfaces, except that in the mntent case, there is an explicit file handle, so a thread-safe implementation is possible in principle. Your proposed interface is similar, so that's good. I would also like to see a comment from the Hurd folks. Presumably they have something similar already for enumerating translators? Thanks, Florian
