Hi,
Current mount (2.25) will always mount a device when more
than one type is given in a comma-separated list. Older mount
(2.17.2 for example) would not not do that but error out.
For example, /dev/sda2 is of type ext4, but we are playing dumb,
to see what mount will say:
$ sudo ./mount /dev/sda2 /place -t btrfs
lt-mount: /dev/sda2: can't read superblock
$ sudo ./mount /dev/sda2 /place -t msdos
lt-mount: wrong fs type, bad option, bad superblock on /dev/sda2,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
$ sudo ./mount /dev/sda2 /place -t btrfs,msdos
$ ./mount | grep sda2
/dev/sda2 on /place type ext4 (rw)
I find this surprising. If -t does not support a comma-separated
list, it should report an error. If it does, it should, IMO, only
try the specified types and not any others.
Benno
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