[Samba] smbclient works, smbmount does not

Paul Johnson pauljohn at ku.edu
Tue Mar 18 05:29:52 GMT 2003

Hello, Samba experts.

I'm stuck, hope you can help.  In the smbmount man page, it says 
questions should be addressed here, I hope it works.

I set up 10 RedHat linux 8.0 systems. As far as I know, they are all the
same. The Samba packages have been upgraded to samba-2.2.7-2 in their 
updates directory.

smbmount works on all but 2 of them. On two, which happen to be side by
side, incidentally, this happens when a non-root user tried to mount

$ smbmount //blake01/Pols blake01 -o username=pjohnson
mount.smbfs[1103]: ioctl failed, res=-1
1103: Could not umount /home/pjohnson/blake01: Operation not permitted

This happens even though the user DOES own the mount point and I've 
given users permission with chmod +s to use smbmnt

$ ls -la /usr/bin/smbmnt
-rwsr-sr-x    1 root     root       560710 Nov 20 11:18 /usr/bin/smbmnt

I have stared at this for a long long time, searched far and wide, but
everybody just keeps telling me "chmod +s /usr/bin/smbmnt".

I have found the trouble shooting Samba chapter on the Samba site, don't 
see any help there.

And, an even bigger part of the mystery is that I am able to use 
smbclient to log into the target server (a win2000 system) and I can 
view directories and such.

So, obviously, it is something I've done wrong in configuring this 
system, possibly something on which Samba depends, but it is only 
infrequently wrong, so most people don't see it.

I've confirmed that on all concerned systems, the permissions are 

$ ls -la /bin/mount
-rwsr-xr-x    1 root     root        81996 Aug 30  2002 /bin/mount

$ ls -la /usr/bin/smb*
-rwxr-xr-x    1 root     root         2036 Nov 20 11:18 /usr/bin/smbadduser
-rwxr-xr-x    1 root     root      1118147 Nov 20 11:18 /usr/bin/smbcacls
-rwxr-xr-x    1 root     root       632525 Nov 20 11:18 /usr/bin/smbclient
-rwxr-xr-x    1 root     root       417621 Nov 20 11:18 /usr/bin/smbcontrol
-rwsr-sr-x    1 root     root       560710 Nov 20 11:18 /usr/bin/smbmnt
-rwxr-xr-x    1 root     root       571094 Nov 20 11:18 /usr/bin/smbmount
-rwxr-xr-x    1 root     root      1078825 Nov 20 11:18 /usr/bin/smbpasswd
-rwxr-xr-x    1 root     root         2293 Nov 20 11:18 /usr/bin/smbprint
-rwxr-xr-x    1 root     root       560241 Nov 20 11:18 /usr/bin/smbspool
-rwxr-xr-x    1 root     root       418346 Nov 20 11:18 /usr/bin/smbstatus
-rwxr-xr-x    1 root     root         4862 Nov 20 11:18 /usr/bin/smbtar
-rwsr-sr-x    1 root     root       560384 Nov 20 11:18 /usr/bin/smbumount

Paul E. Johnson                       email: pauljohn at ukans.edu
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700

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