Administering filesystems

cdfs advanced mount options

When you add or modify a CDFS filesystem you can set advanced options for this filesystem type. The Filesystem Manager supports the following options:

System Use Sharing Protocol

enables/disable the processing of all System Use Sharing Protocol (SUSP) compliant extensions to the ISO-9660/High-Sierra specification. The SUSP defines a mechanism for which the System Use Area of a Directory Record may be shared by multiple independent organizations, such as the Rock Ridge Interchange Protocol (RRIP).

Rock Ridge Interchange Protocol

enables/disable the processing of all Rock Ridge Interchange Protocol (RRIP) extensions to the ISO-9660/High-Sierra specification. The RRIP is a SUSP-compliant set of extensions that provide POSIX file semantics.

Extensions to ISO-9660/High Sierra

disallows the processing of all extensions to the ISO-9660/High-Sierra specification (SUSP and non-SUSP alike). This option is present to support future extensions and at this time is identical in behavior to the two previous options.

Filename Conversion

displays filenames in lowercase and suppresses any trailing period (.) characters. The default is to leave filenames in uppercase. If filenames have been recorded as POSIX^® filenames, this option is not available. You can also choose to suppress the display of version numbers and separators (;) present on ISO 9660 filesystems.

Grant Directory Search Permission to use who has

determines the the search permissions for a directory (as recorded on the CD-ROM or defined by the Default File Permissions option): execute permissions only, or read and execute.

Default File Permissions

sets the permissions for files recorded without permissions (as defined in an extended attribute record, or XAR, the optional data structure used within an ISO9660 format CD-ROM for recording file attributes). Specify the mode in octal. See chmod(1) The default permissions are set to 0555.

Default Directory Permissions

sets the permissions for directories recorded without permissions. Specify the mode in octal. See chmod(1) The default permissions are set to 0555.

Default User (Name or ID)

defines the default user for files and directories that are recorded without ownership.

If you set this option, you must use a valid user name or a valid user ID between 0 and 60000. If you do not set this option, the files are recorded with the user ID of the mount point for the filesystem.

Default Group (Name or ID)

defines the default group for files and directories recorded without this information.

If you set this option, you must use a valid group name or a valid group ID between 0 and 60000. If you do not set this option, the files are recorded with the group ID of the mount point for the filesystem.

User ID Mapping

maps the user ID recorded on the CD-ROM to a user ID on the system. If you set this option, you must use a valid user name or a valid user ID between 0 and 60000.

Group ID Mapping

maps the group ID recorded on the CD-ROM to a group ID on the system. If you set this option, you must use a valid group name or a valid group ID between 0 and 60000.

Device ID Mapping

maps the device number recorded on the CD-ROM to a device number on the system.

If you specify this option, the device pathname must be a full pathname from the root of the CD-ROM. The device number on the system must be a valid device number in the range of 0 to 65535.

NOTE: The Filesystem Manager supports one only of each of the user ID, group ID, and device ID mapping options for Rockridge filesystems. If you require more than one user, group, or device mapping, define the mappings in a file (using the formats listed above) and specify that file when modifying these options with the Filesystem Manager.

Mapping CD-ROM files to system entities

You can map devices names, users and groups found on a mounted CD-ROM filesystem to entities found on the system. For example, by default the system assigns unknown user or group IDs on a mounted CD-ROM to user nobody.

To set the default user or group ID, select the CD-ROM filesystem in the Filesystem Manager and select Mount Modify Mount Configuration Set more options. Enter or select a Default User or Default Group.

To map specific entities (including device names), select the appropriate Mapping button. Enter a filename for the mapping file, or use the Browse button to select an existing file:

To add an entry, use the Add button and enter an ID number or device path and select (or enter) a system ID or device number.
To modify an entry, select it from the list and use the Modify button.
To delete an entry, select it from the list and use the Remove button.