compat/lib/err.c

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <pop@cybercable.fr>, 1999
   6  *
   7  */
   8
   9 /*-
  10  * Copyright (c) 1993
  11  *      The Regents of the University of California.  All rights reserved.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *      From: @(#)err.c 8.1 (Berkeley) 6/4/93
  41  */
  42
  43 #if defined(LIBC_RCS) && !defined(lint)
  44 static const char rcsid[] =
  45         "$Id: err.c,v 1.2 1999/10/11 12:53:21 stelian Exp $";
  46 #endif /* LIBC_RCS and not lint */
  47
  48 #include <err.h>
  49 #include <errno.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53
  54 #include <stdarg.h>
  55
  56 #include <config.h>
  57
  58 extern char *__progname;                /* Program name, from crt0. */
  59
  60 static FILE *err_file; /* file to use for error output */
  61 static void (*err_exit)(int);
  62
  63 /*
  64  * This is declared to take a `void *' so that the caller is not required
  65  * to include <stdio.h> first.  However, it is really a `FILE *', and the
  66  * manual page documents it as such.
  67  */
  68 void
  69 err_set_file(void *fp)
  70 {
  71         if (fp)
  72                 err_file = fp;
  73         else
  74                 err_file = stderr;
  75 }
  76
  77 void
  78 err_set_exit(void (*ef)(int))
  79 {
  80         err_exit = ef;
  81 }
  82
  83
  84 #ifndef HAVE_ERR
  85 __dead void
  86 err(int eval, const char *fmt, ...)
  87 {
  88         va_list ap;
  89         va_start(ap, fmt);
  90         verrc(eval, errno, fmt, ap);
  91         va_end(ap);
  92 }
  93 #endif
  94
  95 #ifndef HAVE_VERR
  96 __dead void
  97 verr(eval, fmt, ap)
  98         int eval;
  99         const char *fmt;
 100         va_list ap;
 101 {
 102         verrc(eval, errno, fmt, ap);
 103 }
 104 #endif
 105
 106 #ifndef HAVE_ERRC
 107 __dead void
 108 errc(int eval, int code, const char *fmt, ...)
 109 {
 110         va_list ap;
 111         va_start(ap, fmt);
 112         verrc(eval, code, fmt, ap);
 113         va_end(ap);
 114 }
 115 #endif
 116
 117 #ifndef HAVE_VERRC
 118 __dead void
 119 verrc(eval, code, fmt, ap)
 120         int eval;
 121         int code;
 122         const char *fmt;
 123         va_list ap;
 124 {
 125         if (err_file == 0)
 126                 err_set_file((FILE *)0);
 127         fprintf(err_file, "%s: ", __progname);
 128         if (fmt != NULL) {
 129                 vfprintf(err_file, fmt, ap);
 130                 fprintf(err_file, ": ");
 131         }
 132         fprintf(err_file, "%s\n", strerror(code));
 133         if (err_exit)
 134                 err_exit(eval);
 135         exit(eval);
 136 }
 137 #endif
 138
 139 #ifndef HAVE_ERRX
 140 __dead void
 141 errx(int eval, const char *fmt, ...)
 142 {
 143         va_list ap;
 144         va_start(ap, fmt);
 145         verrx(eval, fmt, ap);
 146         va_end(ap);
 147 }
 148 #endif
 149
 150 #ifndef HAVE_VERRX
 151 __dead void
 152 verrx(eval, fmt, ap)
 153         int eval;
 154         const char *fmt;
 155         va_list ap;
 156 {
 157         if (err_file == 0)
 158                 err_set_file((FILE *)0);
 159         fprintf(err_file, "%s: ", __progname);
 160         if (fmt != NULL)
 161                 vfprintf(err_file, fmt, ap);
 162         fprintf(err_file, "\n");
 163         if (err_exit)
 164                 err_exit(eval);
 165         exit(eval);
 166 }
 167 #endif
 168
 169 #ifndef HAVE_WARN
 170 void
 171 warn(const char *fmt, ...)
 172 {
 173         va_list ap;
 174         va_start(ap, fmt);
 175         vwarnc(errno, fmt, ap);
 176         va_end(ap);
 177 }
 178 #endif
 179
 180 #ifndef HAVE_VWARN
 181 void
 182 vwarn(fmt, ap)
 183         const char *fmt;
 184         va_list ap;
 185 {
 186         vwarnc(errno, fmt, ap);
 187 }
 188 #endif
 189
 190 #ifndef HAVE_WARNC
 191 void
 192 warnc(int code, const char *fmt, ...)
 193 {
 194         va_list ap;
 195         va_start(ap, fmt);
 196         vwarnc(code, fmt, ap);
 197         va_end(ap);
 198 }
 199 #endif
 200
 201 #ifndef HAVE_VWARNC
 202 void
 203 vwarnc(code, fmt, ap)
 204         int code;
 205         const char *fmt;
 206         va_list ap;
 207 {
 208         if (err_file == 0)
 209                 err_set_file((FILE *)0);
 210         fprintf(err_file, "%s: ", __progname);
 211         if (fmt != NULL) {
 212                 vfprintf(err_file, fmt, ap);
 213                 fprintf(err_file, ": ");
 214         }
 215         fprintf(err_file, "%s\n", strerror(code));
 216 }
 217 #endif
 218
 219 #ifndef HAVE_WARNX
 220 void
 221 warnx(const char *fmt, ...)
 222 {
 223         va_list ap;
 224         va_start(ap, fmt);
 225         vwarnx(fmt, ap);
 226         va_end(ap);
 227 }
 228 #endif
 229
 230 #ifndef HAVE_VWARNX
 231 void
 232 vwarnx(fmt, ap)
 233         const char *fmt;
 234         va_list ap;
 235 {
 236         if (err_file == 0)
 237                 err_set_file((FILE *)0);
 238         fprintf(err_file, "%s: ", __progname);
 239         if (fmt != NULL)
 240                 vfprintf(err_file, fmt, ap);
 241         fprintf(err_file, "\n");
 242 }
 243 #endif