Module Name: src
Committed By: pho
Date: Sat Jan 22 07:39:22 UTC 2022
Added Files:
src/lib/librefuse: fuse_log.h refuse_log.c
Log Message:
lib/librefuse: Implement logging API appeared on FUSE 3.7
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/lib/librefuse/fuse_log.h \
src/lib/librefuse/refuse_log.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/lib/librefuse/fuse_log.h
diff -u /dev/null src/lib/librefuse/fuse_log.h:1.1
--- /dev/null Sat Jan 22 07:39:22 2022
+++ src/lib/librefuse/fuse_log.h Sat Jan 22 07:39:22 2022
@@ -0,0 +1,63 @@
+/* $NetBSD: fuse_log.h,v 1.1 2022/01/22 07:39:22 pho Exp $ */
+
+/*
+ * Copyright (c) 2021 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#if !defined(_FUSE_LOG_H_)
+#define _FUSE_LOG_H_
+
+/* FUSE logging API, appeared on FUSE 3.7. */
+
+#include <stdarg.h>
+#include <sys/cdefs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum fuse_log_level {
+ FUSE_LOG_EMERG,
+ FUSE_LOG_ALERT,
+ FUSE_LOG_CRIT,
+ FUSE_LOG_ERR,
+ FUSE_LOG_WARNING,
+ FUSE_LOG_NOTICE,
+ FUSE_LOG_INFO,
+ FUSE_LOG_DEBUG
+};
+
+typedef void (*fuse_log_func_t)(enum fuse_log_level level, const char *fmt, va_list ap);
+
+void fuse_set_log_func(fuse_log_func_t func);
+void fuse_log(enum fuse_log_level level, const char *fmt, ...) __printflike(2, 3);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
Index: src/lib/librefuse/refuse_log.c
diff -u /dev/null src/lib/librefuse/refuse_log.c:1.1
--- /dev/null Sat Jan 22 07:39:22 2022
+++ src/lib/librefuse/refuse_log.c Sat Jan 22 07:39:22 2022
@@ -0,0 +1,100 @@
+/* $NetBSD: refuse_log.c,v 1.1 2022/01/22 07:39:22 pho Exp $ */
+
+/*
+ * Copyright (c) 2021 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#if !defined(lint)
+__RCSID("$NetBSD: refuse_log.c,v 1.1 2022/01/22 07:39:22 pho Exp $");
+#endif /* !lint */
+
+#include <assert.h>
+#include <fuse_log.h>
+#if defined(MULTITHREADED_REFUSE)
+# include <pthread.h>
+#endif
+#include <stdio.h>
+
+static void
+default_log_func(enum fuse_log_level level __attribute__((__unused__)),
+ const char *fmt, va_list ap) {
+ /* This function needs to be thread-safe. Calling vfprintf(3)
+ * should be okay because POSIX mandates locking FILE* objects
+ * internally. */
+ vfprintf(stderr, fmt, ap);
+}
+
+#if defined(MULTITHREADED_REFUSE)
+static pthread_mutex_t log_func_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+static fuse_log_func_t log_func = default_log_func;
+
+void
+fuse_set_log_func(fuse_log_func_t func) {
+#if defined(MULTITHREADED_REFUSE)
+ /* What we really need here is merely a memory barrier, but
+ * locking a mutex is the easiest way to achieve that. */
+ int rv;
+
+ rv = pthread_mutex_lock(&log_func_mutex);
+ assert(rv == 0);
+#endif
+
+ if (func)
+ log_func = func;
+ else
+ log_func = default_log_func;
+
+#if defined(MULTITHREADED_REFUSE)
+ rv = pthread_mutex_unlock(&log_func_mutex);
+ assert(rv == 0);
+#endif
+}
+
+void
+fuse_log(enum fuse_log_level level, const char *fmt, ...) {
+ va_list ap;
+#if defined(MULTITHREADED_REFUSE)
+ /* What we really need here is merely a memory barrier, but
+ * locking a mutex is the easiest way to achieve that. */
+ int rv;
+
+ rv = pthread_mutex_lock(&log_func_mutex);
+ assert(rv == 0);
+#endif
+
+ va_start(ap, fmt);
+ log_func(level, fmt, ap);
+ va_end(ap);
+
+#if defined(MULTITHREADED_REFUSE)
+ rv = pthread_mutex_unlock(&log_func_mutex);
+ assert(rv == 0);
+#endif
+}
