[PATCH 0/7] fix up issues from djwong/fuse4fs-fork

["Theodore Ts'o" <tytso@mit.edu>]

These are the patches that I've applied to the next branch to clean up
found when trying to compile e2fsprogs on MacOS and via the github's
continuous integration testing.

Note: See .github/workflows/ci.yaml; it's a good reason to get a
github account if you are doing a lot of e2fsprogs development.
If you fork my e2fsprogs repository and push your changes to your github
repo, you can get reports like the ones found here:
      https://github.com/tytso/e2fsprogs/actions


Anyway, with these patches, e2fsprogs builds on MacOS (both using the
github CI and on locally on my Macbook).  Unfortunately fuse2fs has
regressed in that non-root accesses are getting denied with a permission
denied on MacOS, and this worked with e2fsprogs v1.47.4.  Here's a
lightly edited transcript from my Macbook Air:

% uname -a
Darwin macsyma.local 25.4.0 Darwin Kernel Version 25.4.0: Thu Mar 19 19:33:09 PDT 2026; root:xnu-12377.101.15~1/RELEASE_ARM64_T8112 arm64 arm Darwin
% ./mke2fs -Fq -t ext4 -d . /tmp/foo.img  1G
% ./fuse2fs -o allow_other /tmp/foo.img /Users/tytso/mnt
FUSE2FS (foo.img): Warning: fuse2fs does not support using the journal.
There may be file system corruption or data loss if
the file system is not gracefully unmounted.
% stat /Users/tytso/mnt/revoke.o
stat: cannot stat '/Users/tytso/mnt/revoke.o': Permission denied
% sudo stat /Users/tytso/mnt/revoke.o
  File: /Users/tytso/mnt/revoke.o
  Size: 29728     	Blocks: 64         IO Block: 16384  regular file
Device: 55,270	Inode: 91          Links: 1
Access: (0644/-rw-r--r--)  Uid: (15806/   tytso)   Gid: (   20/   staff)
Access: 2026-05-05 00:21:50.000000000 +0200
Modify: 2026-05-05 00:21:50.000000000 +0200
Change: 2026-05-05 00:21:50.000000000 +0200
 Birth: -
% stat revoke.o
  File: revoke.o
  Size: 29728     	Blocks: 64         IO Block: 4096   regular file
Device: 1,18	Inode: 851374      Links: 1
Access: (0644/-rw-r--r--)  Uid: (15806/   tytso)   Gid: (   20/   staff)
Access: 2026-05-05 00:21:50.903084819 +0200
Modify: 2026-05-05 00:21:50.346338295 +0200
Change: 2026-05-05 00:21:50.346580544 +0200
 Birth: 2026-05-05 00:21:50.293229053 +0200
% sum revoke.o
45116    30 revoke.o
% sum /Users/tytso/mnt/revoke.o
sum: /Users/tytso/mnt/revoke.o: Permission denied

So fuse2fs is broken on MacOS, but it's not *totally* broken, since you
can still use it as root.  I'll want to fix this before updating the
master branch, but this is good enough for the next branch.



Theodore Ts'o (7):
  libsupport: drop xbitops.h and define fls() if necessary
  configure.ac: fix disable fuse2fs/fuse4fs by default path
  libsupport: don't use bzero in cache.c
  fuse[24]fs: suppress clang warnings which were breaking the github CI
  libsupport: remove the LIST_HEAD macro from list.h
  libsupport: fix gcc -Wall warnings
  fuse2fs: fix uninitialized variable warnings

 configure               |   8 +++
 configure.ac            |   3 +
 fuse4fs/Makefile.in     |  18 +++---
 fuse4fs/fuse4fs.c       |  29 +++++++--
 lib/config.h.in         |   3 +
 lib/support/Makefile.in |   2 +-
 lib/support/cache.c     |  49 ++++++++++++---
 lib/support/cache.h     |   2 +-
 lib/support/list.h      |  17 ++++--
 lib/support/xbitops.h   | 128 ----------------------------------------
 misc/fuse2fs.c          |  21 +++++++
 11 files changed, 125 insertions(+), 155 deletions(-)
 delete mode 100644 lib/support/xbitops.h

-- 
2.53.0