StdLib/PosixLib/Err/warn_err.c

   1 /** @file
   2   Implement the warning and error output messages.
   3
   4   Copyright (c) 2011, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13  * Copyright (c) 1994 Michael L. Hitch
  14  * All rights reserved.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. All advertising materials mentioning features or use of this software
  25  *    must display the following acknowledgement:
  26  *      This product includes software developed by Michael L. Hitch.
  27  * 4. The name of the author may not be used to endorse or promote products
  28  *    derived from this software without specific prior written permission
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  31  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  32  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  33  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  34  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  35  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  36  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  37  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  38  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  39  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  40  **/
  41 #include  <LibConfig.h>
  42
  43 #include <stdarg.h>
  44 #include <stdio.h>
  45 #include <errno.h>
  46 #include <string.h>
  47 #include <stdlib.h>
  48
  49 static void
  50 _Vdomessage(int doerrno, const char *fmt, va_list args)
  51 {
  52   fprintf(stderr, "%s: ", getprogname());
  53   if (fmt) {
  54     vfprintf(stderr, fmt, args);
  55     fprintf(stderr, ": ");
  56   }
  57   if (doerrno && errno < EMAXERRORVAL) {
  58     fprintf(stderr, "%s", strerror(errno));
  59   }
  60   fprintf(stderr, "\n");
  61 }
  62
  63 void
  64 err(int eval, const char *fmt, ...)
  65 {
  66   va_list ap;
  67   va_start(ap, fmt);
  68   _Vdomessage(1, fmt, ap);
  69   va_end(ap);
  70   exit(eval);
  71 }
  72
  73 void
  74 errx(int eval, const char *fmt, ...)
  75 {
  76   va_list ap;
  77   va_start(ap, fmt);
  78   _Vdomessage(0, fmt, ap);
  79   va_end(ap);
  80   exit(eval);
  81 }
  82
  83 void
  84 warn(const char *fmt, ...)
  85 {
  86   va_list ap;
  87   va_start(ap, fmt);
  88   _Vdomessage(1, fmt, ap);
  89   va_end(ap);
  90 }
  91
  92 void
  93 warnx(const char *fmt, ...)
  94 {
  95   va_list ap;
  96   va_start(ap, fmt);
  97   _Vdomessage(0, fmt, ap);
  98   va_end(ap);
  99 }