misc/err.c

   1 /* err.c --- 4.4BSD utility functions for error messages.
   2    Copyright (C) 1995, 1996 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 not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <stdarg.h>
  21 #include <err.h>
  22 #include <stdlib.h>
  23 #include <errno.h>
  24 #include <string.h>
  25 #include <stdio.h>
  26
  27 extern char *__progname;
  28
  29 #define VA(call)                                                              \
  30 {                                                                             \
  31   va_list ap;                                                                 \
  32   va_start (ap, format);                                                      \
  33   call;                                                                       \
  34   va_end (ap);                                                                \
  35 }
  36
  37 void
  38 vwarnx (const char *format, __gnuc_va_list ap)
  39 {
  40   if (__progname)
  41     fprintf (stderr, "%s: ", __progname);
  42   if (format)
  43     vfprintf (stderr, format, ap);
  44   putc ('\n', stderr);
  45 }
  46
  47 void
  48 vwarn (const char *format, __gnuc_va_list ap)
  49 {
  50   int error = errno;
  51
  52   if (__progname)
  53     fprintf (stderr, "%s: ", __progname);
  54   if (format)
  55     {
  56       vfprintf (stderr, format, ap);
  57       fputs (": ", stderr);
  58     }
  59   __set_errno (error);
  60   fprintf (stderr, "%m\n");
  61 }
  62
  63
  64 void
  65 warn (const char *format, ...)
  66 {
  67   VA (vwarn (format, ap))
  68 }
  69
  70 void
  71 warnx (const char *format, ...)
  72 {
  73   VA (vwarnx (format, ap))
  74 }
  75
  76 void
  77 verr (int status, const char *format, __gnuc_va_list ap)
  78 {
  79   vwarn (format, ap);
  80   exit (status);
  81 }
  82
  83 void
  84 verrx (int status, const char *format, __gnuc_va_list ap)
  85 {
  86   vwarnx (format, ap);
  87   exit (status);
  88 }
  89
  90 void
  91 err (int status, const char *format, ...)
  92 {
  93   VA (verr (status, format, ap))
  94 }
  95
  96 void
  97 errx (int status, const char *format, ...)
  98 {
  99   VA (verrx (status, format, ap))
 100 }