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      1 /* Id: compat_err.c,v 1.5 2020/06/15 01:37:14 schwarze Exp  */
      2 /*
      3  * Copyright (c) 1993
      4  *      The Regents of the University of California.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. Neither the name of the University nor the names of its contributors
     15  *    may be used to endorse or promote products derived from this software
     16  *    without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 #include "config.h"
     31 
     32 #include <errno.h>
     33 #include <stdarg.h>
     34 #include <stdio.h>
     35 #include <stdlib.h>
     36 #include <string.h>
     37 
     38 static void vwarni(const char *, va_list);
     39 static void vwarnxi(const char *, va_list);
     40 
     41 static void
     42 vwarnxi(const char *fmt, va_list ap)
     43 {
     44 	fprintf(stderr, "%s: ", getprogname());
     45 	if (fmt != NULL)
     46 		vfprintf(stderr, fmt, ap);
     47 }
     48 
     49 static void
     50 vwarni(const char *fmt, va_list ap)
     51 {
     52 	int sverrno;
     53 
     54 	sverrno = errno;
     55 	vwarnxi(fmt, ap);
     56 	if (fmt != NULL)
     57 		fputs(": ", stderr);
     58 	fprintf(stderr, "%s\n", strerror(sverrno));
     59 }
     60 
     61 void
     62 err(int eval, const char *fmt, ...)
     63 {
     64 	va_list ap;
     65 
     66 	va_start(ap, fmt);
     67 	vwarni(fmt, ap);
     68 	va_end(ap);
     69 	exit(eval);
     70 }
     71 
     72 void
     73 errx(int eval, const char *fmt, ...)
     74 {
     75 	va_list ap;
     76 
     77 	va_start(ap, fmt);
     78 	vwarnxi(fmt, ap);
     79 	va_end(ap);
     80 	fputc('\n', stderr);
     81 	exit(eval);
     82 }
     83 
     84 void
     85 warn(const char *fmt, ...)
     86 {
     87 	va_list ap;
     88 
     89 	va_start(ap, fmt);
     90 	vwarni(fmt, ap);
     91 	va_end(ap);
     92 }
     93 
     94 void
     95 warnx(const char *fmt, ...)
     96 {
     97 	va_list ap;
     98 
     99 	va_start(ap, fmt);
    100 	vwarnxi(fmt, ap);
    101 	va_end(ap);
    102 	fputc('\n', stderr);
    103 }
    104