lib/libc/gen/err.c

   1 /*-
   2  * Copyright (c) 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *      From: @(#)err.c 8.1 (Berkeley) 6/4/93
  33  *
  34  * $FreeBSD: src/lib/libc/gen/err.c,v 1.6 1999/08/27 23:58:33 peter Exp $
  35  * $DragonFly: src/lib/libc/gen/err.c,v 1.5 2006/02/12 21:14:11 dillon Exp $
  36  */
  37
  38 #include <sys/cdefs.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #include <stdarg.h>
  46
  47
  48 static FILE *err_file; /* file to use for error output */
  49 static void (*err_exit)(int);
  50
  51 /*
  52  * This is declared to take a `void *' so that the caller is not required
  53  * to include <stdio.h> first.  However, it is really a `FILE *', and the
  54  * manual page documents it as such.
  55  */
  56 void
  57 err_set_file(void *fp)
  58 {
  59         if (fp)
  60                 err_file = fp;
  61         else
  62                 err_file = stderr;
  63 }
  64
  65 void
  66 err_set_exit(void (*ef)(int))
  67 {
  68         err_exit = ef;
  69 }
  70
  71 void
  72 err(int eval, const char *fmt, ...)
  73 {
  74         va_list ap;
  75         va_start(ap, fmt);
  76         verrc(eval, errno, fmt, ap);
  77         va_end(ap);
  78 }
  79
  80 void
  81 verr(int eval, const char *fmt, va_list ap)
  82 {
  83         verrc(eval, errno, fmt, ap);
  84 }
  85
  86 void
  87 errc(int eval, int code, const char *fmt, ...)
  88 {
  89         va_list ap;
  90         va_start(ap, fmt);
  91         verrc(eval, code, fmt, ap);
  92         va_end(ap);
  93 }
  94
  95 void
  96 verrc(int eval, int code, const char *fmt, va_list ap)
  97 {
  98         if (err_file == 0)
  99                 err_set_file((FILE *)0);
 100         fprintf(err_file, "%s: ", getprogname());
 101         if (fmt != NULL) {
 102                 vfprintf(err_file, fmt, ap);
 103                 fprintf(err_file, ": ");
 104         }
 105         fprintf(err_file, "%s\n", strerror(code));
 106         if (err_exit)
 107                 err_exit(eval);
 108         exit(eval);
 109 }
 110
 111 void
 112 errx(int eval, const char *fmt, ...)
 113 {
 114         va_list ap;
 115         va_start(ap, fmt);
 116         verrx(eval, fmt, ap);
 117         va_end(ap);
 118 }
 119
 120 void
 121 verrx(int eval, const char *fmt, va_list ap)
 122 {
 123         if (err_file == 0)
 124                 err_set_file((FILE *)0);
 125         fprintf(err_file, "%s: ", getprogname());
 126         if (fmt != NULL)
 127                 vfprintf(err_file, fmt, ap);
 128         fprintf(err_file, "\n");
 129         if (err_exit)
 130                 err_exit(eval);
 131         exit(eval);
 132 }
 133
 134 void
 135 _warn(const char *fmt, ...)
 136 {
 137         va_list ap;
 138         va_start(ap, fmt);
 139         vwarnc(errno, fmt, ap);
 140         va_end(ap);
 141 }
 142 __weak_reference(_warn,warn);
 143
 144 void
 145 vwarn(const char *fmt, va_list ap)
 146 {
 147         vwarnc(errno, fmt, ap);
 148 }
 149
 150 void
 151 warnc(int code, const char *fmt, ...)
 152 {
 153         va_list ap;
 154         va_start(ap, fmt);
 155         vwarnc(code, fmt, ap);
 156         va_end(ap);
 157 }
 158
 159 void
 160 vwarnc(int code, const char *fmt, va_list ap)
 161 {
 162         if (err_file == 0)
 163                 err_set_file((FILE *)0);
 164         fprintf(err_file, "%s: ", getprogname());
 165         if (fmt != NULL) {
 166                 vfprintf(err_file, fmt, ap);
 167                 fprintf(err_file, ": ");
 168         }
 169         fprintf(err_file, "%s\n", strerror(code));
 170 }
 171
 172 void
 173 warnx(const char *fmt, ...)
 174 {
 175         va_list ap;
 176         va_start(ap, fmt);
 177         vwarnx(fmt, ap);
 178         va_end(ap);
 179 }
 180
 181 void
 182 vwarnx(const char *fmt, va_list ap)
 183 {
 184         if (err_file == 0)
 185                 err_set_file((FILE *)0);
 186         fprintf(err_file, "%s: ", getprogname());
 187         if (fmt != NULL)
 188                 vfprintf(err_file, fmt, ap);
 189         fprintf(err_file, "\n");
 190 }