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      1 /*	$NetBSD: error.c,v 1.3 2009/03/14 15:36:04 dsl 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *        This product includes software developed by Waldi Ravens.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <stdio.h>
     34 #include <osbind.h>
     35 #include <stdarg.h>
     36 #include <stdlib.h>
     37 #include <string.h>
     38 #include <unistd.h>
     39 #include "libtos.h"
     40 
     41 static void	errmsg PROTO((int, char *, va_list));
     42 
     43 const char	*program_name;
     44 
     45 void
     46 init_toslib(char *arg0)
     47 {
     48 	char	*p;
     49 
     50 	if (isatty(STDERR_FILENO) && (!*arg0 || !getenv("STDERR")))
     51 		(void)Fforce(STDERR_FILENO, -1);
     52 
     53 	if (!(p = strrchr(arg0, '/')))
     54 		p = strrchr(arg0, '\\');
     55 	program_name = p ? ++p : arg0;
     56 }
     57 
     58 void
     59 error(int err, char *frm)
     60 {
     61 	va_list		args;
     62 
     63 	va_start(args, frm);
     64 	errmsg(err, frm, args);
     65 	va_end(args);
     66 }
     67 
     68 void
     69 fatal(int err, char *frm)
     70 {
     71 	va_list		args;
     72 
     73 	va_start(args, frm);
     74 	errmsg(err, frm, args);
     75 	va_end(args);
     76 
     77 	xexit(EXIT_FAILURE);
     78 }
     79 
     80 static void
     81 errmsg(int err, char *frm, va_list args)
     82 {
     83 	extern const char *program_name;
     84 
     85 	eprintf("%s: ", program_name);
     86 	veprintf(frm, args);
     87 
     88 	if (err != -1) {
     89 		char	*es = strerror(err);
     90 		if (es)
     91 			eprintf(": %s", es);
     92 		else
     93 			eprintf(": unknown error %d", err);
     94 	}
     95 
     96 	eprintf("\n");
     97 }
     98