Package: file
Version: 1:5.41-4
Severity: normal
X-Debbugs-Cc: msl0000023...@gmail.com
Hello.
While HFS Plus version 4 can be detected by file(1), the extended version 5,
aka. HFSX, couldn't be detected at all, reporting only 'data'.
According to Apple's HFS Volume Format (TN1150), HFSX is an extension to HFS
Plus, which enables additional previously incompatible features to be added
to HFS Plus. One offical feature under this extension is the case-sensitive
names.
mkfs.hfsplus(8) from hfsprogs currently uses HFSX only if a case-sensitive
file system is requested by user (via option '-s').
The following commands reproduces the issue.
Create a case-insensitive file system:
# truncate --size 1GiB test.disk
# mkfs.hfsplus test.disk
Initialized test.disk as a 1024 MB HFS Plus volume
# file test.disk
test.disk: Macintosh HFS Extended version 4 data last mounted by:
'10.0', created: Tue Nov 22 22:38:37 2022, last modified: Tue Nov 22 14:38:37
2022, last checked: Tue Nov 22 14:38:37 2022, block size: 4096, number of
blocks: 262144, free blocks: 259062
Here's another imperfection that file(1) incorrectly reported this file
system as 'HFS Extended' where it should be 'HFS Plus'.
Now create a case-sensitive file system and feed it to file(1):
# unlink test.disk
# truncate --size 1GiB test.disk
# mkfs.hfsplus -s test.disk
Initialized test.disk as a 1024 MB HFS Plus volume
# file test.disk
test.disk: data
Of course this file system is nicely supported by Linux:
# mount test.disk -o loop /mnt/1/
# losetup -l
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE DIO LOG-SEC
/dev/loop0 0 0 1 0 /root/test.disk 0 512
# grep ^/dev/loop0\ /proc/mounts
/dev/loop0 /mnt/1 hfsplus rw,relatime,umask=22,uid=0,gid=0,nls=utf8 0 0
# df -h /mnt/1/
檔案系統 容量 已用 可用 已用% 掛載點
/dev/loop0 1.0G 13M 1012M 2% /mnt/1
Additional information about HFSX:
* It has a different signature 'HX' (0x4858) than 'H+' (0x482B) in HFS Plus
version 4.
* It has a version 5.
* It didn't have to be case-sensitive.
I will probably submit a patch to address this once I get used to the magic
file format.
-- System Information:
Debian Release: bookworm/sid
APT prefers unstable
APT policy: (500, 'unstable')
merged-usr: no
Architecture: ppc64
Foreign Architectures: powerpc
Kernel: Linux 4.1.42-rivoreo-powerpc64-largepage (SMP w/4 CPU threads)
Kernel taint flags: TAINT_DIE
Locale: LANG=zh_TW.UTF-8, LC_CTYPE=zh_TW.UTF-8 (charmap=UTF-8),
LANGUAGE=zh_TW:zh_CN:zh:en_GB:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages file depends on:
ii libc6 2.36-4
ii libmagic1 1:5.41-4
file recommends no packages.
file suggests no packages.
-- no debconf information
