text: /****************************************************************************
   *
   *   Copyright (c) 2012, 2013 PX4 Development Team. 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. Neither the name PX4 nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "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
   * COPYRIGHT OWNER OR CONTRIBUTORS 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.
   *
   ****************************************************************************/
  
  /**
   * @file err.c
   *
   * Simple error/warning functions, heavily inspired by the BSD functions of
   * the same names.
   */
  
  #include <px4_config.h>
  
  #define __STDC_FORMAT_MACROS
  #include <inttypes.h>
  
  #include <stdlib.h>
  #include <errno.h>
  #include <string.h>
  
  #include "err.h"
  
  #define NOCODE		1000	/* larger than maximum errno */
  
  #if CONFIG_NFILE_STREAMS > 0
  #  include <stdio.h>
  #elif defined(CONFIG_ARCH_LOWPUTC)
  #  include <debug.h>
  extern int lib_lowvprintf(const char *fmt, va_list ap);
  #else
  #  warning Cannot output without one of CONFIG_NFILE_STREAMS or CONFIG_ARCH_LOWPUTC
  #endif
  
  const char *
  getprogname(void)
  {
  #if CONFIG_TASK_NAME_SIZE > 0
  	FAR struct tcb_s	*thisproc = sched_self();
  
  	return thisproc->name;
  #else
  	return "app";
  #endif
  }
  
  static void
  warnerr_core(int errcode, const char *fmt, va_list args)
  {
  #if CONFIG_NFILE_STREAMS > 0
  	fprintf(stderr, "%s: ", getprogname());
  	vfprintf(stderr, fmt, args);
  
  	/* convenience as many parts of NuttX use negative errno */
  	if (errcode < 0) {
  		errcode = -errcode;
  	}
  
  	if (errcode < NOCODE) {
  		fprintf(stderr, ": %s", strerror(errcode));
  	}
  
  	fprintf(stderr, "\n");
  #elif CONFIG_ARCH_LOWPUTC
  	lowsyslog("%s: ", getprogname());
  	lowvsyslog(fmt, args);
  
  	/* convenience as many parts of NuttX use negative errno */
  	if (errcode < 0) {
  		errcode = -errcode;
  	}
  
  	if (errcode < NOCODE) {
  		lowsyslog(": %s", strerror(errcode));
  	}
  
  	lowsyslog("\n");
  #endif
  }
  
  void
  err(int exitcode, const char *fmt, ...)
  {
  	va_list	args;
  
  	va_start(args, fmt);
  	verr(exitcode, fmt, args);
  }
  
  void
  verr(int exitcode, const char *fmt, va_list args)
  {
  	warnerr_core(errno, fmt, args);
  	exit(exitcode);
  }
  
  void
  errc(int exitcode, int errcode, const char *fmt, ...)
  {
  	va_list args;
  
  	va_start(args, fmt);
  	verrc(exitcode, errcode, fmt, args);
  }
  
  void
  verrc(int exitcode, int errcode, const char *fmt, va_list args)
  {
  	warnerr_core(errcode, fmt, args);
  	exit(exitcode);
  }
  
  void
  errx(int exitcode, const char *fmt, ...)
  {
  	va_list args;
  
  	va_start(args, fmt);
  	verrx(exitcode, fmt, args);
  }
  
  void
  verrx(int exitcode, const char *fmt, va_list args)
  {
  	warnerr_core(NOCODE, fmt, args);
  	exit(exitcode);
  }
  
  void
  warn(const char *fmt, ...)
  {
  	va_list args;
  
  	va_start(args, fmt);
  	vwarn(fmt, args);
  	va_end(args);
  }
  
  void
  vwarn(const char *fmt, va_list args)
  {
  	warnerr_core(errno, fmt, args);
  }
  
  void
  warnc(int errcode, const char *fmt, ...)
  {
  	va_list args;
  
  	va_start(args, fmt);
  	vwarnc(errcode, fmt, args);
  	va_end(args);
  }
  
  void
  vwarnc(int errcode, const char *fmt, va_list args)
  {
  	warnerr_core(errcode, fmt, args);
  }
  
  void
  warnx(const char *fmt, ...)
  {
  	va_list args;
  
  	va_start(args, fmt);
  	vwarnx(fmt, args);
  	va_end(args);
  }
  
  void
  vwarnx(const char *fmt, va_list args)
  {
  	warnerr_core(NOCODE, fmt, args);
  }
  