c3-lang/libbsd/src/err.c

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• Hash : 5745ca03
  Author :
  Date : 2019-08-06T15:49:41
  

  err: Add err(), warn(), errx() and warnx() familiy of functions
  
  Some systems such as Windows or musl-libc based ones do not have these
  BSD extensions. In addition libbsd itself is making use of the warnx()
  functions, so we better provide these interfaces in case they are
  missing.
  

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• src/err.c

• /*
   * Copyright © 2006 Robert Millan
   * Copyright © 2011, 2019 Guillem Jover <guillem@hadrons.org>
   *
   * 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 ``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 <err.h>
  #ifdef LIBBSD_NEED_ERR_H_FUNCS
  #include <errno.h>
  #endif
  #include <string.h>
  #include <stdarg.h>
  #include <stdlib.h>
  #include <stdio.h>
  
  void
  vwarnc(int code, const char *format, va_list ap)
  {
  	fprintf(stderr, "%s: ", getprogname());
  	if (format) {
  		vfprintf(stderr, format, ap);
  		fprintf(stderr, ": ");
  	}
  	fprintf(stderr, "%s\n", strerror(code));
  }
  
  void
  warnc(int code, const char *format, ...)
  {
  	va_list ap;
  
  	va_start(ap, format);
  	vwarnc(code, format, ap);
  	va_end(ap);
  }
  
  void
  verrc(int status, int code, const char *format, va_list ap)
  {
  	fprintf(stderr, "%s: ", getprogname());
  	if (format) {
  		vfprintf(stderr, format, ap);
  		fprintf(stderr, ": ");
  	}
  	fprintf(stderr, "%s\n", strerror(code));
  	exit(status);
  }
  
  void
  errc(int status, int code, const char *format, ...)
  {
  	va_list ap;
  
  	va_start(ap, format);
  	verrc(status, code, format, ap);
  	va_end(ap);
  }
  
  #ifdef LIBBSD_NEED_ERR_H_FUNCS
  void
  vwarn(const char *format, va_list ap)
  {
  	vwarnc(errno, format, ap);
  }
  
  void
  warn(const char *format, ...)
  {
  	va_list ap;
  
  	va_start(ap, format);
  	vwarnc(errno, format, ap);
  	va_end(ap);
  }
  
  void
  vwarnx(const char *format, va_list ap)
  {
  	fprintf(stderr, "%s: ", getprogname());
  	if (format)
  		vfprintf(stderr, format, ap);
  	fprintf(stderr, "\n");
  }
  
  void
  warnx(const char *format, ...)
  {
  	va_list ap;
  
  	va_start(ap, format);
  	vwarnx(format, ap);
  	va_end(ap);
  }
  
  void
  verr(int status, const char *format, va_list ap)
  {
  	verrc(status, errno, format, ap);
  }
  
  void
  err(int status, const char *format, ...)
  {
  	va_list ap;
  
  	va_start(ap, format);
  	verrc(status, errno, format, ap);
  	va_end(ap);
  }
  
  void
  verrx(int eval, const char *format, va_list ap)
  {
  	fprintf(stderr, "%s: ", getprogname());
  	if (format)
  		vfprintf(stderr, format, ap);
  	fprintf(stderr, "\n");
  	exit(eval);
  }
  
  void
  errx(int eval, const char *format, ...)
  {
  	va_list ap;
  
  	va_start(ap, format);
  	verrx(eval, format, ap);
  	va_end(ap);
  }
  #endif
  

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