misc/err.c

   1 /* err.c --- 4.4BSD utility functions for error messages.
   2 Copyright (C) 1995 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4
   5 The GNU C Library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 License, or (at your option) any later version.
   9
  10 The GNU C Library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #include <stdarg.h>
  21 #include <err.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24
  25 extern char *__progname;
  26
  27 #define VA(call)                                                              \
  28 {                                                                             \
  29   va_list ap;                                                                 \
  30   va_start (ap, format);                                                      \
  31   call;                                                                       \
  32   va_end (ap);                                                                \
  33 }
  34
  35 void
  36 vwarn (const char *format, __gnuc_va_list ap)
  37 {
  38   fprintf (stderr, format, ap);
  39 }
  40
  41 void
  42 vwarnx (const char *format, __gnuc_va_list ap)
  43 {
  44   if (__progname)
  45     fprintf (stderr, "%s: ", __progname);
  46   fprintf (stderr, format, ap);
  47   putc ('\n', stderr);
  48 }
  49
  50
  51 void
  52 warn (const char *format, ...)
  53 {
  54   VA (vwarn (format, ap))
  55 }
  56
  57 void
  58 warnx (const char *format, ...)
  59 {
  60   VA (vwarnx (format, ap))
  61 }
  62
  63 void
  64 verr (int status, const char *format, __gnuc_va_list ap)
  65 {
  66   vwarn (format, ap);
  67   exit (status);
  68 }
  69
  70 void
  71 verrx (int status, const char *format, __gnuc_va_list ap)
  72 {
  73   vwarnx (format, ap);
  74   exit (status);
  75 }
  76
  77 void
  78 err (int status, const char *format, ...)
  79 {
  80   VA (verr (status, format, ap))
  81 }
  82
  83 void
  84 errx (int status, const char *format, ...)
  85 {
  86   VA (verrx (status, format, ap))
  87 }