tools/virtiofsd/fuse_log.c

   1 /*
   2  * FUSE: Filesystem in Userspace
   3  * Copyright (C) 2019  Red Hat, Inc.
   4  *
   5  * Logging API.
   6  *
   7  * This program can be distributed under the terms of the GNU LGPLv2.
   8  * See the file COPYING.LIB
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "fuse_log.h"
  13
  14 #include <stdarg.h>
  15 #include <stdio.h>
  16
  17 static void default_log_func(__attribute__((unused)) enum fuse_log_level level,
  18                              const char *fmt, va_list ap)
  19 {
  20     vfprintf(stderr, fmt, ap);
  21 }
  22
  23 static fuse_log_func_t log_func = default_log_func;
  24
  25 void fuse_set_log_func(fuse_log_func_t func)
  26 {
  27     if (!func) {
  28         func = default_log_func;
  29     }
  30
  31     log_func = func;
  32 }
  33
  34 void fuse_log(enum fuse_log_level level, const char *fmt, ...)
  35 {
  36     va_list ap;
  37
  38     va_start(ap, fmt);
  39     log_func(level, fmt, ap);
  40     va_end(ap);
  41 }