[Bug 242225] "fstyp -l" does not report exfat filesystem volume label

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242225

--- Comment #15 from commit-hook at FreeBSD.org ---
A commit in branch stable/12 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=58a9e1ca85797a050d3a39bffa6babcb9d3463a4

commit 58a9e1ca85797a050d3a39bffa6babcb9d3463a4
Author:     Conrad Meyer <cem at FreeBSD.org>
AuthorDate: 2019-12-22 03:19:17 +0000
Commit:     Ed Maste <emaste at FreeBSD.org>
CommitDate: 2021-02-02 21:12:04 +0000

    fstyp(8): Show exFAT volume labels with -l flag

    exfat is fundamentally the same design as fat32.  The superblock differs
    marginally, and there are some additional optional features irrelevant to
    fstype(8); the structure of dirents has changed slightly to enable, among
    other things, larger files; the directory entries are no longer DOS 8.3
    ASCII or local 8-bit encoding, but instead explicitly UCS-2-LE.

    (As a result, this change uses iconv to convert a found exfat volume label
    to the user's locale.)

    Locating the volume label is identical to FAT32: locate the root directory
    and walk through dirents until you find a volume label.  Like FAT32, follow
    the FAT chain between root directory clusters as necessary.

    PR:             242225
    Reported by:    Victor Sudakov <vas AT sibptus.ru>

    (cherry picked from commit 85b4c344c8c69ff7993bc0ac833aaf9a8108b88d)

    fstyp(8): Fix WITHOUT_ICONV build

    Reported by:    olivier

    (cherry picked from commit 5ab1cb52b21fdc5524bd970e9b5cdff21a5bcabf)

 usr.sbin/fstyp/Makefile            |   4 +
 usr.sbin/fstyp/exfat.c             | 303 ++++++++++++++++++++++++++++++++++++-
 usr.sbin/fstyp/fstyp.c             |  49 ++++--
 usr.sbin/fstyp/fstyp.h             |   7 +
 usr.sbin/fstyp/ntfs.c              |   6 +
 usr.sbin/fstyp/tests/fstyp_test.sh |  10 ++
 6 files changed, 367 insertions(+), 12 deletions(-)

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