gen/FreeBSD/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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 static char sccsid[] = "@(#)err.c       8.1 (Berkeley) 6/4/93";
  32 #endif /* LIBC_SCCS and not lint */
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD: src/lib/libc/gen/err.c,v 1.15 2008/04/03 20:36:44 imp Exp $");
  35
  36 #include "namespace.h"
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <stdarg.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include "un-namespace.h"
  44
  45 #include "libc_private.h"
  46
  47 static FILE *err_file; /* file to use for error output */
  48 static void (*err_exit)(int);
  49
  50 /*
  51  * This is declared to take a `void *' so that the caller is not required
  52  * to include <stdio.h> first.  However, it is really a `FILE *', and the
  53  * manual page documents it as such.
  54  */
  55 void
  56 err_set_file(void *fp)
  57 {
  58         if (fp)
  59                 err_file = fp;
  60         else
  61                 err_file = stderr;
  62 }
  63
  64 void
  65 err_set_exit(void (*ef)(int))
  66 {
  67         err_exit = ef;
  68 }
  69
  70 __weak_reference(_err, err);
  71
  72 void
  73 _err(int eval, const char *fmt, ...)
  74 {
  75         va_list ap;
  76         va_start(ap, fmt);
  77         verrc(eval, errno, fmt, ap);
  78         va_end(ap);
  79 }
  80
  81 void
  82 verr(eval, fmt, ap)
  83         int eval;
  84         const char *fmt;
  85         va_list ap;
  86 {
  87         verrc(eval, errno, fmt, ap);
  88 }
  89
  90 void
  91 errc(int eval, int code, const char *fmt, ...)
  92 {
  93         va_list ap;
  94         va_start(ap, fmt);
  95         verrc(eval, code, fmt, ap);
  96         va_end(ap);
  97 }
  98
  99 void
 100 verrc(int eval, int code, const char *fmt, va_list ap)
 101 {
 102         if (err_file == 0)
 103                 err_set_file((FILE *)0);
 104         fprintf(err_file, "%s: ", _getprogname());
 105         if (fmt != NULL) {
 106                 vfprintf(err_file, fmt, ap);
 107                 fprintf(err_file, ": ");
 108         }
 109         fprintf(err_file, "%s\n", strerror(code));
 110         if (err_exit)
 111                 err_exit(eval);
 112         exit(eval);
 113 }
 114
 115 void
 116 errx(int eval, const char *fmt, ...)
 117 {
 118         va_list ap;
 119         va_start(ap, fmt);
 120         verrx(eval, fmt, ap);
 121         va_end(ap);
 122 }
 123
 124 void
 125 verrx(int eval, const char *fmt, va_list ap)
 126 {
 127         if (err_file == 0)
 128                 err_set_file((FILE *)0);
 129         fprintf(err_file, "%s: ", _getprogname());
 130         if (fmt != NULL)
 131                 vfprintf(err_file, fmt, ap);
 132         fprintf(err_file, "\n");
 133         if (err_exit)
 134                 err_exit(eval);
 135         exit(eval);
 136 }
 137
 138 __weak_reference(_warn, warn);
 139
 140 void
 141 _warn(const char *fmt, ...)
 142 {
 143         va_list ap;
 144         va_start(ap, fmt);
 145         vwarnc(errno, fmt, ap);
 146         va_end(ap);
 147 }
 148
 149 void
 150 vwarn(const char *fmt, va_list ap)
 151 {
 152         vwarnc(errno, fmt, ap);
 153 }
 154
 155 void
 156 warnc(int code, const char *fmt, ...)
 157 {
 158         va_list ap;
 159         va_start(ap, fmt);
 160         vwarnc(code, fmt, ap);
 161         va_end(ap);
 162 }
 163
 164 void
 165 vwarnc(int code, const char *fmt, va_list ap)
 166 {
 167         if (err_file == 0)
 168                 err_set_file((FILE *)0);
 169         fprintf(err_file, "%s: ", _getprogname());
 170         if (fmt != NULL) {
 171                 vfprintf(err_file, fmt, ap);
 172                 fprintf(err_file, ": ");
 173         }
 174         fprintf(err_file, "%s\n", strerror(code));
 175 }
 176
 177 void
 178 warnx(const char *fmt, ...)
 179 {
 180         va_list ap;
 181         va_start(ap, fmt);
 182         vwarnx(fmt, ap);
 183         va_end(ap);
 184 }
 185
 186 void
 187 vwarnx(const char *fmt, va_list ap)
 188 {
 189         if (err_file == 0)
 190                 err_set_file((FILE *)0);
 191         fprintf(err_file, "%s: ", _getprogname());
 192         if (fmt != NULL)
 193                 vfprintf(err_file, fmt, ap);
 194         fprintf(err_file, "\n");
 195 }