Mounting smbfs as non-root

martinko gamato at
Tue Dec 19 15:25:25 PST 2006

Andriy Gapon wrote:
> on 13/12/2006 11:11 Peter Jeremy said the following:
>> I am trying to mount a SMB filesystem as an ordinary user (because
>> I don't want to give root to this particular person).  Whilst
>> running mount_smbfs as root works, attempting the same command
>> as non-root consistently returns
>> mount_smbfs: can not setup kernel iconv table (ISO8859-1:tolower): syserr = Operation not permitted
>> I've looked at a ktrace and the source code and the offending code is
>> sysctlbyname("kern.iconv.add", ...)
>> I've looked through iconv_sysctl_add() and can't see any way for the
>> code to return EPERM.
>> My reading of all the code also suggests that once the relevant iconv
>> tables are loaded, then iconv_sysctl_add() should return EEXIST
>> (via iconv_register_cspair()).  But even if the relevant translation
>> table is loaded (by mounting a SMB filesystem as root), I still get
>> the above error when trying to use mount_smbfs as a user.  I've even
>> written some code to let me look at the kern.iconv MIB tree which
>> confirms the above but doesn't get any me any closer to a solution.
>> This is the same on two 6.2-PRERELEASE systems and I get the same
>> behaviour on an oldish 7-current system.  Does anyone have any
>> suggestions on what is going wrong?
> Not entirely the same issue, but quite similar and rather annoying.
> I have the following in loader.conf:
> msdosfs_iconv_load="YES"
> msdosfs itself is built into kernel.
> kldstat confirms that the above modules are indeed loaded.
> I also have vfs.usermount=1
> I can successfully mount any DOS fs as a regular user as long as I don't
> specify any mount options that require iconv conversions.
> Otherwise I get EPERM:
> $ mount_msdosfs -L en_US.UTF-8 /dev/da0s1 /mnt/flash/
> mount_msdosfs: msdosfs_iconv: Operation not permitted
> I can see from ktrace that the error comes from some __sysctl call.
> It is sufficient to do at least one mount as root and then
> subsequent user mounts are successful.

I've been experiencing the exactly same issue for too long, too. :-((


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