MOUNT_SMBFS(8) Maintenance Procedures MOUNT_SMBFS(8)

NAME

mount_smbfs, umount_smbfs - mount and unmount a shared resource from a
CIFS file server

SYNOPSIS

/sbin/mount [-F smbfs] [generic-options] [-o name=value] [-O] resource


/sbin/mount [-F smbfs] [generic-options] [-o name=value] [-O] mount-point


/sbin/mount [-F smbfs] [generic-options] [-o name=value]
[-O] resource mount-point


/sbin/umount [-F smbfs] [generic-options] mount-point

DESCRIPTION

The mount utility attaches a named resource, resource, to the file system
hierarchy at the path name location, mount-point, which must already
exist.


If mount-point has any contents prior to the mount operation, those
contents remain hidden until the resource is unmounted. An authorized
user with the SYS_MOUNT privilege can perform a mount operation. Also, a
user can perform SMBFS mount operations on a directory the user owns.


If the resource is listed in the /etc/vfstab file, you can specify either
resource or mount-point as the mount command will consult the /etc/vfstab
file for more information. If the -F option is omitted, mount takes the
file system type from the entry in the /etc/vfstab file.


If the resource is not listed in the /etc/vfstab file, the command line
must specify both resource and mount-point.


The umount utility detaches a mounted file system from the file system
hierarchy. An authorized user with the SYS_MOUNT privilege can perform a
umount operation. Also, a user can perform SMBFS unmount operations on a
directory the user owns.


The network/smb/client service must be enabled to successfully mount a
CIFS share. This service is enabled, by default.


To enable the service, enter the following svcadm(8) command:

# svcadm enable network/smb/client

Operands

The mount command supports the following operands:

resource //[workgroup;][user[:password]@]server/share


The name of the resource to be mounted. In addition to its name, you
can specify the following information about the resource:

o password is the password associated with user. If password
is not specified, the mount first attempts to use the
password stored by the smbutil login command (if any). If
that password fails to authenticate, the mount_smbfs
prompts you for a password.

o server is the DNS or NetBIOS name of the remote computer.

o share is the resource name on the remote server.

o user is the remote user name. If user is omitted, the
logged in user ID is used.

o workgroup is the name of the workgroup or the Windows
domain in which the user name is defined.

If the resource includes a workgroup, you must escape the
semicolon that appears after the workgroup name to prevent
it from being interpreted by the command shell. For
instance, surround the entire resource name with double
quotes: mount -F smbfs "//SALES;george@RSERVER" /mnt.


mount-point

The path to the location where the file system is to be mounted or
unmounted. The mount command maintains a table of mounted file
systems in the /etc/mnttab file. See the mnttab(5) man page.

OPTIONS

See the mount(8) man page for the list of supported generic-options.

-o name=value or
-o name

Sets the file system-specific properties. You can specify more than
one name-value pair as a list of comma-separated pairs. No spaces are
permitted in the list. The properties are as follows:


acl|noacl

Enable (or disable) presentation of Access Control Lists (ACLs)
on files and directories under this smbfs(4FS) mount. The
default behavior is noacl, which presents files and directories
as owned by the owner of the mount point and having permissions
based on fileperms or dirperms. With the acl mount option, files
are presented with ACLs obtained from the SMB server. Setting
the acl mount option is not advised unless the system is joined
to an Active Directory domain and using ldap(1) so it can
correctly present ACL identities from the SMB server.


dirperms=octaltriplet

Specifies the permissions to be assigned to directories. The
value must be specified as an octal triplet, such as 755. The
default value for the directory mode is taken from the fileperms
setting, with execute permission added where fileperms has read
permission.

Note that these permissions have no relation to the rights
granted by the CIFS server.


fileperms=octaltriplet

Specifies the permissions to be assigned to files. The value must
be specified as an octal triplet, such as 644. The default value
is 700.

Note that these permissions have no relation to the rights
granted by the CIFS server.


gid=groupid

Assigns the specified group ID to files. The default value is the
group ID of the directory where the volume is mounted.


intr|nointr

Enable (or disable) cancellation of smbfs(4FS) I/O operations
when the user interrupts the calling thread (for example, by
hitting Ctrl-C while an operation is underway). The default is
intr (interruption enabled), so cancellation is normally allowed.


noprompt

Suppresses the prompting for a password when mounting a share.
This property enables you to permit anonymous access to a share.
Anonymous access does not require a password.

The mount operation fails if a password is required, the noprompt
property is set, and no password is stored by the smbutil login
command.


retry_count=number

Specifies the number of SMBFS retries to attempt before the
connection is marked as broken. By default, 4 attempts are made.

The retry_count property value set by the mount command overrides
the global value set in SMF or the value set in your .nsmbrc
file.


timeout=seconds

Specifies the CIFS request timeout. By default, the timeout is 15
seconds.

The timeout property value set by the mount command overrides the
global value set in SMF or the value set in your .nsmbrc file.


uid=userid

Assigns the specified user ID files. The default value is the
owner ID of the directory where the volume is mounted.


xattr|noxattr

Enable (or disable) Solaris Extended Attributes in this mount
point. This option defaults to xattr (enabled Extended
Attributes), but note: if the CIFS server does not support CIFS
"named streams", smbfs(4FS) forces this option to noxattr. When a
mount has the noxattr option, attempts to use Solaris Extended
attributes fail with EINVAL.


-O

Overlays mount. Allow the file system to be mounted over an existing
mount point, making the underlying file system inaccessible. If a
mount is attempted on a pre-existing mount point without setting this
flag, the mount fails, producing the error "device busy."

EXAMPLES

Example 1: Mounting an SMBFS Share

The following example shows how to mount the /tmp share from the nano
server in the SALES workgroup on the local /mnt mount point. You must
supply the password for the root user to successfully perform the mount
operation.


# mount -F smbfs "//SALES;root@nano.example.org/tmp" /mnt
Password:

Example 2: Verifying That an SMBFS File System Is Mounted

The following example shows how to mount the /tmp share from the nano
server on the local /mnt mount point. You must supply the password for
the root user to successfully perform the mount operation.


# mount -F smbfs //root@nano.example.org/tmp /mnt
Password:


You can verify that the share is mounted in the following ways:

o View the file system entry in the /etc/mnttab file.

# grep root /etc/mnttab
//root@nano.example.org/tmp /mnt smbfs dev=4900000 1177097833


o View the output of the mount command.

# mount | grep root
/mnt on //root@nano.example.org/tmp read/write/setuid/devices/dev=4900000 on
Fri Apr 20 13:37:13 2007


o View the output of the df /mnt command.

# df /mnt
/mnt (//root@nano.example.org/tmp): 3635872 blocks -1 files


Obtain information about the mounted share by viewing the output of the
df -k /mnt command.


# df -k /mnt
Filesystem kbytes used avail capacity Mounted on
//root@nano.example.org/tmp
1882384 64448 1817936 4% /mnt

Example 3: Unmounting a CIFS Share

This example assumes that a CIFS share has been mounted on the /mnt mount
point. The following command line unmounts the share from the mount
point.


# umount /mnt

FILES

/etc/mnttab

Table of mounted file systems.


/etc/dfs/fstypes

Default distributed file system type.


/etc/vfstab

Table of automatically mounted resources.


$HOME/.nsmbrc

User-settable mount point configuration file to store the description
for each connection.

ATTRIBUTES

See the attributes(7) man page for descriptions of the following
attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+

SEE ALSO

ldap(1), smbutil(1), acl(2), fcntl(2), link(2), mknod(2), mount(2),
symlink(2), umount(2), pcfs(4FS), smbfs(4FS), mnttab(5), nsmbrc(5),
vfstab(5), attributes(7), mount(8), mountall(8), svcadm(8)

AUTHORS

This manual page contains material originally authored by Boris Popov,
bpATbutya.kz, bpATFreeBSD.org.

NOTES

The Solaris CIFS client always attempts to use gethostbyname() to resolve
host names. If the host name cannot be resolved, the CIFS client uses
NetBIOS name resolution (NBNS). By default, the Solaris CIFS client
permits the use of NBNS to enable Solaris CIFS clients in Windows
environments to work without additional configuration.


Since NBNS has been exploited in the past, you might want to disable it.
To disable NBNS, set the nbns-enabled service management facility
property to false. By default, nbns-enabled is set to true.


If the directory on which a file system is to be mounted is a symbolic
link, the file system is mounted on the directory to which the symbolic
link refers, rather than being mounted on top of the symbolic link
itself.


November 22, 2021 MOUNT_SMBFS(8)