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      1 /*	$NetBSD: error.c,v 1.4 2025/11/19 09:43:27 nia Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Waldi Ravens.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <stdio.h>
     31 #include <osbind.h>
     32 #include <stdarg.h>
     33 #include <stdlib.h>
     34 #include <string.h>
     35 #include <unistd.h>
     36 #include "libtos.h"
     37 
     38 static void	errmsg PROTO((int, char *, va_list));
     39 
     40 const char	*program_name;
     41 
     42 void
     43 init_toslib(char *arg0)
     44 {
     45 	char	*p;
     46 
     47 	if (isatty(STDERR_FILENO) && (!*arg0 || !getenv("STDERR")))
     48 		(void)Fforce(STDERR_FILENO, -1);
     49 
     50 	if (!(p = strrchr(arg0, '/')))
     51 		p = strrchr(arg0, '\\');
     52 	program_name = p ? ++p : arg0;
     53 }
     54 
     55 void
     56 error(int err, char *frm)
     57 {
     58 	va_list		args;
     59 
     60 	va_start(args, frm);
     61 	errmsg(err, frm, args);
     62 	va_end(args);
     63 }
     64 
     65 void
     66 fatal(int err, char *frm)
     67 {
     68 	va_list		args;
     69 
     70 	va_start(args, frm);
     71 	errmsg(err, frm, args);
     72 	va_end(args);
     73 
     74 	xexit(EXIT_FAILURE);
     75 }
     76 
     77 static void
     78 errmsg(int err, char *frm, va_list args)
     79 {
     80 	extern const char *program_name;
     81 
     82 	eprintf("%s: ", program_name);
     83 	veprintf(frm, args);
     84 
     85 	if (err != -1) {
     86 		char	*es = strerror(err);
     87 		if (es)
     88 			eprintf(": %s", es);
     89 		else
     90 			eprintf(": unknown error %d", err);
     91 	}
     92 
     93 	eprintf("\n");
     94 }
     95