src/libs/bsd/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  */
  33
  34
  35 #include <err.h>
  36 #include <errno.h>
  37 #include <stdarg.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 //#include "libc_private.h"
  43
  44 extern const char *_getprogname(void);
  45
  46 static FILE *err_file; /* file to use for error output */
  47 static void (*err_exit)(int);
  48
  49 void _err(int eval, const char *fmt, ...);
  50 void _warn(const char *fmt, ...);
  51
  52 /*
  53  * This is declared to take a `void *' so that the caller is not required
  54  * to include <stdio.h> first.  However, it is really a `FILE *', and the
  55  * manual page documents it as such.
  56  */
  57 void
  58 err_set_file(void *fp)
  59 {
  60         if (fp)
  61                 err_file = fp;
  62         else
  63                 err_file = stderr;
  64 }
  65
  66 void
  67 err_set_exit(void (*ef)(int))
  68 {
  69         err_exit = ef;
  70 }
  71
  72 __weak_reference(_err, err);
  73
  74 void
  75 _err(int eval, const char *fmt, ...)
  76 {
  77         va_list ap;
  78         va_start(ap, fmt);
  79         verrc(eval, errno, fmt, ap);
  80         va_end(ap);
  81 }
  82
  83 void
  84 verr(eval, fmt, ap)
  85         int eval;
  86         const char *fmt;
  87         va_list ap;
  88 {
  89         verrc(eval, errno, fmt, ap);
  90 }
  91
  92 void
  93 errc(int eval, int code, const char *fmt, ...)
  94 {
  95         va_list ap;
  96         va_start(ap, fmt);
  97         verrc(eval, code, fmt, ap);
  98         va_end(ap);
  99 }
 100
 101 void
 102 verrc(eval, code, fmt, ap)
 103         int eval;
 104         int code;
 105         const char *fmt;
 106         va_list ap;
 107 {
 108         if (err_file == 0)
 109                 err_set_file((FILE *)0);
 110         fprintf(err_file, "%s: ", _getprogname());
 111         if (fmt != NULL) {
 112                 vfprintf(err_file, fmt, ap);
 113                 fprintf(err_file, ": ");
 114         }
 115         fprintf(err_file, "%s\n", strerror(code));
 116         if (err_exit)
 117                 err_exit(eval);
 118         exit(eval);
 119 }
 120
 121 void
 122 errx(int eval, const char *fmt, ...)
 123 {
 124         va_list ap;
 125         va_start(ap, fmt);
 126         verrx(eval, fmt, ap);
 127         va_end(ap);
 128 }
 129
 130 void
 131 verrx(eval, fmt, ap)
 132         int eval;
 133         const char *fmt;
 134         va_list ap;
 135 {
 136         if (err_file == 0)
 137                 err_set_file((FILE *)0);
 138         fprintf(err_file, "%s: ", _getprogname());
 139         if (fmt != NULL)
 140                 vfprintf(err_file, fmt, ap);
 141         fprintf(err_file, "\n");
 142         if (err_exit)
 143                 err_exit(eval);
 144         exit(eval);
 145 }
 146
 147 __weak_reference(_warn, warn);
 148
 149 void
 150 _warn(const char *fmt, ...)
 151 {
 152         va_list ap;
 153         va_start(ap, fmt);
 154         vwarnc(errno, fmt, ap);
 155         va_end(ap);
 156 }
 157
 158 void
 159 vwarn(fmt, ap)
 160         const char *fmt;
 161         va_list ap;
 162 {
 163         vwarnc(errno, fmt, ap);
 164 }
 165
 166 void
 167 warnc(int code, const char *fmt, ...)
 168 {
 169         va_list ap;
 170         va_start(ap, fmt);
 171         vwarnc(code, fmt, ap);
 172         va_end(ap);
 173 }
 174
 175 void
 176 vwarnc(code, fmt, ap)
 177         int code;
 178         const char *fmt;
 179         va_list ap;
 180 {
 181         if (err_file == 0)
 182                 err_set_file((FILE *)0);
 183         fprintf(err_file, "%s: ", _getprogname());
 184         if (fmt != NULL) {
 185                 vfprintf(err_file, fmt, ap);
 186                 fprintf(err_file, ": ");
 187         }
 188         fprintf(err_file, "%s\n", strerror(code));
 189 }
 190
 191 void
 192 warnx(const char *fmt, ...)
 193 {
 194         va_list ap;
 195         va_start(ap, fmt);
 196         vwarnx(fmt, ap);
 197         va_end(ap);
 198 }
 199
 200 void
 201 vwarnx(fmt, ap)
 202         const char *fmt;
 203         va_list ap;
 204 {
 205         if (err_file == 0)
 206                 err_set_file((FILE *)0);
 207         fprintf(err_file, "%s: ", _getprogname());
 208         if (fmt != NULL)
 209                 vfprintf(err_file, fmt, ap);
 210         fprintf(err_file, "\n");
 211 }
 212
 213 #pragma weak err=_err
 214 #pragma weak warn=_warn