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<samba:parameter name="map read only"
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xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
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This controls how the DOS read only attribute should be mapped from a UNIX filesystem.
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This parameter can take three different values, which tell <citerefentry><refentrytitle>smbd</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry> how to display the read only attribute on files, where either
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<smbconfoption name="store dos attributes"/> is set to <constant>No</constant>, or no extended attribute is
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present. If <smbconfoption name="store dos attributes"/> is set to <constant>yes</constant> then this
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parameter is <emphasis>ignored</emphasis>. This is a new parameter introduced in Samba version 3.0.21.
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<para>The three settings are :</para>
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<constant>Yes</constant> - The read only DOS attribute is mapped to the inverse of the user
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or owner write bit in the unix permission mode set. If the owner write bit is not set, the
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read only attribute is reported as being set on the file.
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If the read only DOS attribute is set, Samba sets the owner, group and
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others write bits to zero. Write bits set in an ACL are ignored by Samba.
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If the read only DOS attribute is unset, Samba simply sets the write bit of the
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<constant>Permissions</constant> - The read only DOS attribute is mapped to the effective permissions of
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the connecting user, as evaluated by <citerefentry><refentrytitle>smbd</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry> by reading the unix permissions and POSIX ACL (if present).
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If the connecting user does not have permission to modify the file, the read only attribute
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is reported as being set on the file.
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<constant>No</constant> - The read only DOS attribute is unaffected by permissions, and can only be set by
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the <smbconfoption name="store dos attributes"/> method. This may be useful for exporting mounted CDs.
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<value type="default">yes</value>