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struct fuse_loop_config was passed as a plain struct, without any
version identifer. This had two implications
1) Any addition of new parameters required a FUSE_SYMVER for
fuse_session_loop_mt() and fuse_loop_mt() as otherwise a read
beyond end-of previous struct size might have happened.
2) Filesystems also might have been recompiled and the developer
might not have noticed the struct extensions and unexpected for
the developer (or people recomliling the code) uninitialized
parameters would have been passed.
Code is updated to have struct fuse_loop_config as an opaque/private
data type for file systems that want version 312
(FUSE_MAKE_VERSION(3, 12)). The deprecated fuse_loop_config_v1
is visible, but should not be used outside of internal
conversion functions
File systems that want version >= 32 < 312 get the previous
struct (through ifdefs) and the #define of fuse_loop_mt
and fuse_session_loop_mt ensures that these recompiled file
systems call into the previous API, which then converts
the struct. This is similar to existing compiled applications
when just libfuse updated, but binaries it is solved with
the FUSE_SYMVER ABI compact declarations.
Signed-off-by: Bernd Schubert <bschubert@ddn.com>
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Define FUSE_USE_VERSION < 35 to get old ioctl prototype
with int commands; define FUSE_USE_VERSION >= 35 to get
new ioctl prototype with unsigned int commands.
Fixes #463.
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Introduce an API for custom log handler functions. This allows libfuse
applications to send messages to syslog(3) or other logging systems.
See include/fuse_log.h for details.
Convert libfuse from fprintf(stderr, ...) to log_fuse(level, ...). Most
messages are error messages with FUSE_LOG_ERR log level. There are also
some debug messages which now use the FUSE_LOG_DEBUG log level.
Note that lib/mount_util.c is used by both libfuse and fusermount3.
Since fusermount3 does not link against libfuse, we cannot call
fuse_log() from lib/mount_util.c. This file will continue to use
fprintf(stderr, ...) until someone figures out how to split it up.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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The passthrough example filesystem can be used for validating the API
and the implementation in the FUSE kernel module.
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* Update meson.build to add mount_util.c to libfuse_sources
unconditionally, it's non Linux-only
* FreeBSD, like NetBSD, doesn't have mntent.h, so don't include
that and define IGNORE_MTAB for both
* FreeBSD, like NetBSD, has no umount2() sysctl, so similarly define
it to unmount()
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The unprivileged option allows to run the FUSE file system process
without privileges by dropping capabilities and preventing them from
being re-acquired via setuid / fscaps etc. To accomplish this,
mount.fuse sets up the `/dev/fuse` file descriptor and mount itself
and passes the file descriptor via the `/dev/fd/%u` mountpoint syntax
to the FUSE file system.
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Multiple meson build scripts improvements including:
* Bump meson requirement to 0.40.1 (0.40 already required)
* Declare a dependency object for main library
* Stop using add_global_arguments()
* Various minor style fixes
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Fixes: #207.
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cfg.has('HAVE_ICONV') was always true.
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There is a proper meson-mode now.
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For example, FreeBSD doesn't have it.
Fixes: #173.
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