[fuse-devel] fstab 'noauto' bug

[Don T. <dt...@to...>]

Just started messing with fuse and have discovered that many bugs
with 2.4.2 are fixed in CVS. I see that the option processing 
has been totally reworked.

One problem I still find is that the "noauto" option in fstab results in an error.

The Linux mount man page has a long list of options which mountable filesystems
should recognize, even if they simply ignore them.  It is apppened below.  Auto and
noauto are especially important.

Glad to see that "user" works in CVS now!  I'm sure that someone familiar
with the new option processing code can fix this more easily than I could.


Don Taber

--------------------------

From the Linux mount man page:

       -o     Options are specified with a -o flag followed by a comma separated string of options.
              Some  of  these options are only useful when they appear in the /etc/fstab file.  The
              following options apply to any file system that is being mounted (but not every  file
              system  actually  honors them - e.g., the sync option today has effect only for ext2,
              ext3 and ufs):

              async  All I/O to the file system should be done asynchronously.

              atime  Update inode access time for each access. This is the default.

              auto   Can be mounted with the -a option.

              defaults
                     Use default options: rw, suid, dev, exec, auto, nouser, and async.

              dev    Interpret character or block special devices on the file system.

              exec   Permit execution of binaries.

              group  Allow an ordinary (i.e., non-root) user to mount the file system if one of his
                     groups  matches  the  group  of  the  device.  This option implies the options
                     nosuid and nodev (unless overridden by subsequent options, as  in  the  option
                     line group,dev,suid).

              mand   Allow mandatory locks on this filesystem. See fcntl(2).

              _netdev
                     The  filesystem resides on a device that requires network access (used to pre-
                     vent the system from attempting to mount these filesystems until  the  network
                     has been enabled on the system).

              noatime
                     Do  not  update inode access times on this file system (e.g, for faster access
                     on the news spool to speed up news servers).

              noauto Can only be mounted explicitly (i.e., the -a option will not  cause  the  file
                     system to be mounted).

              nodev  Do not interpret character or block special devices on the file system.

              noexec Do  not  allow  direct  execution  of any binaries on the mounted file system.
                     (Until recently it was possible to run binaries anyway using  a  command  like
                     /lib/ld*.so /mnt/binary. This trick fails since Linux 2.4.25 / 2.6.0.)

              nomand Do not allow mandatory locks on this filesystem.

              nosuid Do  not allow set-user-identifier or set-group-identifier bits to take effect.
                     (This seems safe, but is  in  fact  rather  unsafe  if  you  have  suidperl(1)
                     installed.)

              nouser Forbid  an  ordinary  (i.e., non-root) user to mount the file system.  This is
                     the default.

              owner  Allow an ordinary (i.e., non-root) user to mount the file system if he is  the
                     owner of the device.  This option implies the options nosuid and nodev (unless
                     overridden by subsequent options, as in the option line owner,dev,suid).

              remount
                     Attempt to remount an already-mounted file system.  This is commonly  used  to
                     change  the  mount flags for a file system, especially to make a readonly file
                     system writeable. It does not change device or mount point.

              ro     Mount the file system read-only.

              rw     Mount the file system read-write.

              suid   Allow set-user-identifier or set-group-identifier bits to take effect.

              sync   All I/O to the file system should be done synchronously.

              dirsync
                     All directory updates within the file system  should  be  done  synchronously.
                     This  affects the following system calls: creat, link, unlink, symlink, mkdir,
                     rmdir, mknod and rename.

              user   Allow an ordinary user to mount the file system.  The  name  of  the  mounting
                     user  is  written  to mtab so that he can unmount the file system again.  This
                     option implies the options noexec, nosuid, and  nodev  (unless  overridden  by
                     subsequent options, as in the option line user,exec,dev,suid).

              users  Allow  every  user  to mount and unmount the file system.  This option implies
                     the options  noexec,  nosuid,  and  nodev  (unless  overridden  by  subsequent
                     options, as in the option line users,exec,dev,suid).

       --bind Remount a subtree somewhere else (so that its contents are available in both places).
              See above.

       --move Move a subtree to some other place. See above.