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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/filesystems/hfs.txt |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
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1 | |||
2 | Macintosh HFS Filesystem for Linux | ||
3 | ================================== | ||
4 | |||
5 | HFS stands for ``Hierarchical File System'' and is the filesystem used | ||
6 | by the Mac Plus and all later Macintosh models. Earlier Macintosh | ||
7 | models used MFS (``Macintosh File System''), which is not supported, | ||
8 | MacOS 8.1 and newer support a filesystem called HFS+ that's similar to | ||
9 | HFS but is extended in various areas. Use the hfsplus filesystem driver | ||
10 | to access such filesystems from Linux. | ||
11 | |||
12 | |||
13 | Mount options | ||
14 | ============= | ||
15 | |||
16 | When mounting an HFS filesystem, the following options are accepted: | ||
17 | |||
18 | creator=cccc, type=cccc | ||
19 | Specifies the creator/type values as shown by the MacOS finder | ||
20 | used for creating new files. Default values: '????'. | ||
21 | |||
22 | uid=n, gid=n | ||
23 | Specifies the user/group that owns all files on the filesystems. | ||
24 | Default: user/group id of the mounting process. | ||
25 | |||
26 | dir_umask=n, file_umask=n, umask=n | ||
27 | Specifies the umask used for all files , all directories or all | ||
28 | files and directories. Defaults to the umask of the mounting process. | ||
29 | |||
30 | session=n | ||
31 | Select the CDROM session to mount as HFS filesystem. Defaults to | ||
32 | leaving that decision to the CDROM driver. This option will fail | ||
33 | with anything but a CDROM as underlying devices. | ||
34 | |||
35 | part=n | ||
36 | Select partition number n from the devices. Does only makes | ||
37 | sense for CDROMS because they can't be partitioned under Linux. | ||
38 | For disk devices the generic partition parsing code does this | ||
39 | for us. Defaults to not parsing the partition table at all. | ||
40 | |||
41 | quiet | ||
42 | Ignore invalid mount options instead of complaining. | ||
43 | |||
44 | |||
45 | Writing to HFS Filesystems | ||
46 | ========================== | ||
47 | |||
48 | HFS is not a UNIX filesystem, thus it does not have the usual features you'd | ||
49 | expect: | ||
50 | |||
51 | o You can't modify the set-uid, set-gid, sticky or executable bits or the uid | ||
52 | and gid of files. | ||
53 | o You can't create hard- or symlinks, device files, sockets or FIFOs. | ||
54 | |||
55 | HFS does on the other have the concepts of multiple forks per file. These | ||
56 | non-standard forks are represented as hidden additional files in the normal | ||
57 | filesystems namespace which is kind of a cludge and makes the semantics for | ||
58 | the a little strange: | ||
59 | |||
60 | o You can't create, delete or rename resource forks of files or the | ||
61 | Finder's metadata. | ||
62 | o They are however created (with default values), deleted and renamed | ||
63 | along with the corresponding data fork or directory. | ||
64 | o Copying files to a different filesystem will loose those attributes | ||
65 | that are essential for MacOS to work. | ||
66 | |||
67 | |||
68 | Creating HFS filesystems | ||
69 | =================================== | ||
70 | |||
71 | The hfsutils package from Robert Leslie contains a program called | ||
72 | hformat that can be used to create HFS filesystem. See | ||
73 | <http://www.mars.org/home/rob/proj/hfs/> for details. | ||
74 | |||
75 | |||
76 | Credits | ||
77 | ======= | ||
78 | |||
79 | The HFS drivers was written by Paul H. Hargrovea (hargrove@sccm.Stanford.EDU) | ||
80 | and is now maintained by Roman Zippel (roman@ardistech.com) at Ardis | ||
81 | Technologies. | ||
82 | Roman rewrote large parts of the code and brought in btree routines derived | ||
83 | from Brad Boyer's hfsplus driver (also maintained by Roman now). | ||