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Signed-off-by: izxl007 <zeng.zheng@zte.com.cn>
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BT_STACK_SZ and backtrace_buffer are not used when
HAVE_BACKTRACE is undefined. Wrap them in #ifdef
to avoid a build warning:
../lib/fuse_signals.c:31:14: warning: 'backtrace_buffer' defined but not used [-Wunused-variable]
31 | static void *backtrace_buffer[BT_STACK_SZ];
| ^~~~~~~~~~~~~~~~
Signed-off-by: Georgi Valkov <gvalkov@gmail.com>
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Issue with previous code was that fuse_session_exit()
didn't wake up the semaphore in fuse_loop_mt.c.
Lock, semaphore and all uses of checking for "exited"
are now moved to struct fuse_session to have it
available for the signal handler.
This also removes internal fuse_session_reset() calls,
as that makes testing hard. From git history I also
don't see why it was added.
Closes: https://github.com/libfuse/libfuse/issues/997
Signed-off-by: Bernd Schubert <bschubert@ddn.com>
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Commit dae1184 ("Add syslog and fatal signal handler feature")
added fuse_set_fail_signal_handlers() which can store
"se". But as fuse_set_signal_handlers() also stores the object
storing it was made conditionally if not set already.
As per https://github.com/libfuse/libfuse/issues/1182 this
breaks some applications like osspd, that have multiple
sessions and rely on the right order and that the last
call of fuse_set_signal_handlers() wins.
Special thanks to Sébastien Noel to debug this issue.
Closes: https://github.com/libfuse/libfuse/issues/1182
Signed-off-by: Bernd Schubert <bernd@bsbernd.com>
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The option to the path of the binary had been accidentally removed
in the scripts that can parse backtraces.
The dump_stack() function had left over debug messages.
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execinfo.h is unnecessary if HAVE_BACKTRACE is not defined.
This increases portability for systems without execinfo.h
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I see random ENOTCONN failures in xfstest generic/013 and generic/014
in my branch, but earliest on the 2nd run - takes ~12hours to get
the issue, but then there are no further information logged.
ENOTCONN points to a daemon crash - I need backtraces and a core dump.
This adds optional handling of fatal signals to print a core dump
and optional syslog logging with these new public functions:
fuse_set_fail_signal_handlers()
In addition to the existing fuse_set_signal_handlers(). This is not
enabled together with fuse_set_signal_handlers(), as it is change
in behavior and file systems might already have their own fatal
handlers.
fuse_log_enable_syslog
Print logs to syslog instead of stderr
fuse_log_close_syslog
Close syslog (for now just does closelog())
Code in fuse_signals.c is also updated, to be an array of signals,
and setting signal handlers is now down with a for-loop instead
of one hand coded set_one_signal_handler() per signal.
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It is very hard to see in github tests what is actually failing
with signals - add the gnu-libc backtrace handler.
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This addresses: https://github.com/libfuse/libfuse/issues/724
HAVE_LIBC_VERSIONED_SYMBOLS configures the library if to use
versioned symbols and is set at meson configuration time.
External filesystems (the main target, actually)
include fuse headers and the preprocessor
then acts on HAVE_LIBC_VERSIONED_SYMBOLS. Problem was now that
'config.h' was not distributed with libfuse and so
HAVE_LIBC_VERSIONED_SYMBOLS was never defined with external
tools and the preprocessor did the wrong decision.
This commit also increases the the minimal meson version,
as this depends on meson feature only available in 0.50
<quote 'meson' >
WARNING: Project specifies a minimum meson_
version '>= 0.42' but uses features which were added
in newer versions:
* 0.50.0: {'install arg in configure_file'}
</quote>
Additionally the config file has been renamed to "fuse_config.h"
to avoid clashes - 'config.h' is not very specific.
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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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`int sig` is acutually used, so `(void) sig;` is unneeded.
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Fixes: #160.
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documentation
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Fixes: #81.
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This should make more clear what file contains code for what
purpose.
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Applied (whitespace-cleanup) to each file. Having whitespace changes
in the VCS is ugly, but it ensures that in the future committers
can run this function to *avoid* commiting any whitespace.
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to properly restore the default signal handler.
Reported by: Chris Johnson <johnsocg@gmail.com>
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add AC_SYS_LARGEFILE to your configure.ac instead.
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- modified all examples to be included in doxygen
- modified the API documentation to have more details
- added the 490px_FUSE_structure.svg.png (c) wikipedia
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