Updated: 2022/Sep/29

Please read Privacy Policy. It's for your privacy.

MOUNT_CD9660(8)             System Manager's Manual            MOUNT_CD9660(8)

NAME
     mount_cd9660 - mount an ISO-9660 file system

SYNOPSIS
     mount_cd9660 [-G gid] [-M mask] [-m mask] [-o options] [-U uid]
                  special node

DESCRIPTION
     The mount_cd9660 command attaches the ISO-9660 file system residing on
     the device special to the global file system namespace at the location
     indicated by node.  Both special and node are converted to absolute paths
     before use.

     The options are as follows:

     -G group    Set the group of the files in the file system to group.  The
                 default gid on non-Rockridge volumes is zero.

     -M mask     Specify the maximum file permissions for directories in the
                 file system.  See the -m description for details.

     -m mask     Specify the maximum file permissions for files in the file
                 system.  (For example, a mask of 755 specifies that, by
                 default, the owner should have read, write, and execute
                 permissions for files, but others should only have read and
                 execute permissions).  See chmod(1) for more information
                 about octal file modes.  Only the nine low-order bits of mask
                 are used.  The default mask on non-Rockridge volumes is 755.

     -o          Options are specified with a -o flag followed by a comma
                 separated string of options.  Besides options mentioned in
                 mount(8) man page, following cd9660-specific options are
                 supported:

                 extatt  Enable the use of extended attributes.

                 gens    Do not strip version numbers on files and leave the
                         case of the filename alone.  (By default, uppercase
                         characters are translated to lowercase, and if there
                         are files with different version numbers on the disk,
                         only the last one will be listed.)

                         In either case, files may be opened without giving a
                         version number, in which case you get the last one,
                         or by explicitly stating a version number (albeit
                         it's quite difficult to know it, if you are not using
                         the gens option), in which case you get the specified
                         version.

                 nocasetrans
                         A synonym for nomaplcase.

                 nojoliet
                         Do not make use of Joliet extensions for long
                         filenames which may be present in the file system.

                         Interpretation of Joliet extensions is enabled by
                         default, Unicode file names are encoded into UTF-8.

                 nomaplcase
                         File names on cd9660 cdrom without Rock Ridge
                         extension present should be uppercase only.  By
                         default, cd9660 recodes file names read from a non-
                         Rock Ridge disk to all lowercase characters.
                         nomaplcase turns off this mapping.

                 norrip  Do not use any Rockridge extensions included in the
                         file system.

                 nrr     Same as norrip.  For compatibility with Solaris only.

                 rrcaseins
                         Makes all lookups case-insensitive even for CD-ROMs
                         with Rock-Ridge extensions (for Rock-Ridge, default
                         is case-sensitive lookup).

     -U user     Set the owner of the files in the file system to user.  The
                 default uid on non-Rockridge volumes is zero.

     For compatibility with previous releases, following obsolete flags are
     still recognized:
           -e      Same as -o extatt.
           -g      Same as -o gens.
           -j      Same as -o nojoliet.
           -r      Same as -o norrip.

SEE ALSO
     mount(2), unmount(2), fstab(5), mount(8), mscdlabel(8), vndconfig(8)

HISTORY
     The mount_cd9660 utility first appeared 4.4BSD.  Support for Joliet file
     system appeared in NetBSD 1.4.  Options nomaplcase and rrcaseins were
     added in NetBSD 1.5.  UTF-8 encoding of Unicode file names for Joliet
     file systems was added in NetBSD 3.0.

NOTES
     For Joliet file systems, the Unicode file names used to be filtered to
     ISO-8859-1 character set.  This changed in NetBSD 3.0, file names are
     encoded into UTF-8 now by default.  The behaviour is controllable by the
     vfs.cd9660.utf8_joliet sysctl; the former behaviour is available by
     setting it to 0.

BUGS
     For some cdroms the information in the Rock Ridge extension is wrong and
     the cdrom needs to be mounted with "norrip".  A sign that something is
     wrong is that the stat(2) system call returns EBADF causing, e.g., "ls
     -l" to fail with "Bad file descriptor".

     The cd9660 file system does not support the original "High Sierra"
     ("CDROM001") format.

     POSIX device node mapping is currently not supported.

     Version numbers are not stripped if Rockridge extensions are in use.  In
     this case, you have to use the original name of the file as recorded on
     disk, i.e. use uppercase and append the version number to the file.

     There is no ECMA support.

NetBSD 11.99                   February 1, 2024                   NetBSD 11.99