88 lines
3.0 KiB
ReStructuredText
88 lines
3.0 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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==================================
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Macintosh HFS Filesystem for Linux
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==================================
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.. Note:: This filesystem doesn't have a maintainer.
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HFS stands for ``Hierarchical File System`` and is the filesystem used
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by the Mac Plus and all later Macintosh models. Earlier Macintosh
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models used MFS (``Macintosh File System``), which is not supported,
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MacOS 8.1 and newer support a filesystem called HFS+ that's similar to
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HFS but is extended in various areas. Use the hfsplus filesystem driver
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to access such filesystems from Linux.
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Mount options
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=============
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When mounting an HFS filesystem, the following options are accepted:
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creator=cccc, type=cccc
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Specifies the creator/type values as shown by the MacOS finder
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used for creating new files. Default values: '????'.
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uid=n, gid=n
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Specifies the user/group that owns all files on the filesystems.
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Default: user/group id of the mounting process.
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dir_umask=n, file_umask=n, umask=n
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Specifies the umask used for all files , all directories or all
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files and directories. Defaults to the umask of the mounting process.
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session=n
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Select the CDROM session to mount as HFS filesystem. Defaults to
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leaving that decision to the CDROM driver. This option will fail
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with anything but a CDROM as underlying devices.
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part=n
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Select partition number n from the devices. Does only makes
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sense for CDROMS because they can't be partitioned under Linux.
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For disk devices the generic partition parsing code does this
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for us. Defaults to not parsing the partition table at all.
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quiet
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Ignore invalid mount options instead of complaining.
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Writing to HFS Filesystems
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==========================
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HFS is not a UNIX filesystem, thus it does not have the usual features you'd
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expect:
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* You can't modify the set-uid, set-gid, sticky or executable bits or the uid
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and gid of files.
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* You can't create hard- or symlinks, device files, sockets or FIFOs.
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HFS does on the other have the concepts of multiple forks per file. These
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non-standard forks are represented as hidden additional files in the normal
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filesystems namespace which is kind of a cludge and makes the semantics for
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the a little strange:
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* You can't create, delete or rename resource forks of files or the
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Finder's metadata.
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* They are however created (with default values), deleted and renamed
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along with the corresponding data fork or directory.
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* Copying files to a different filesystem will loose those attributes
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that are essential for MacOS to work.
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Creating HFS filesystems
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========================
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The hfsutils package from Robert Leslie contains a program called
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hformat that can be used to create HFS filesystem. See
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<https://www.mars.org/home/rob/proj/hfs/> for details.
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Credits
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=======
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The HFS drivers was written by Paul H. Hargrovea (hargrove@sccm.Stanford.EDU).
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Roman Zippel (roman@ardistech.com) rewrote large parts of the code and brought
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in btree routines derived from Brad Boyer's hfsplus driver.
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