misc/err.c

   1 /* 4.4BSD utility functions for error messages.
   2    Copyright (C) 1995-2019 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdarg.h>
  20 #include <err.h>
  21 #include <stdlib.h>
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25
  26 #include <wchar.h>
  27 #define flockfile(s) _IO_flockfile (s)
  28 #define funlockfile(s) _IO_funlockfile (s)
  29
  30 extern char *__progname;
  31
  32 #define VA(call)                                                              \
  33 {                                                                             \
  34   va_list ap;                                                                 \
  35   va_start (ap, format);                                                      \
  36   call;                                                                       \
  37   va_end (ap);                                                                \
  38 }
  39
  40 void
  41 vwarnx (const char *format, __gnuc_va_list ap)
  42 {
  43   flockfile (stderr);
  44   __fxprintf (stderr, "%s: ", __progname);
  45   if (format != NULL)
  46     __vfxprintf (stderr, format, ap);
  47   __fxprintf (stderr, "\n");
  48   funlockfile (stderr);
  49 }
  50 libc_hidden_def (vwarnx)
  51
  52 void
  53 vwarn (const char *format, __gnuc_va_list ap)
  54 {
  55   int error = errno;
  56
  57   flockfile (stderr);
  58   if (format != NULL)
  59     {
  60       __fxprintf (stderr, "%s: ", __progname);
  61       __vfxprintf (stderr, format, ap);
  62       __set_errno (error);
  63       __fxprintf (stderr, ": %m\n");
  64     }
  65   else
  66     {
  67       __set_errno (error);
  68       __fxprintf (stderr, "%s: %m\n", __progname);
  69     }
  70   funlockfile (stderr);
  71 }
  72 libc_hidden_def (vwarn)
  73
  74
  75 void
  76 warn (const char *format, ...)
  77 {
  78   VA (vwarn (format, ap))
  79 }
  80 libc_hidden_def (warn)
  81
  82 void
  83 warnx (const char *format, ...)
  84 {
  85   VA (vwarnx (format, ap))
  86 }
  87 libc_hidden_def (warnx)
  88
  89 void
  90 verr (int status, const char *format, __gnuc_va_list ap)
  91 {
  92   vwarn (format, ap);
  93   exit (status);
  94 }
  95 libc_hidden_def (verr)
  96
  97 void
  98 verrx (int status, const char *format, __gnuc_va_list ap)
  99 {
 100   vwarnx (format, ap);
 101   exit (status);
 102 }
 103 libc_hidden_def (verrx)
 104
 105 void
 106 err (int status, const char *format, ...)
 107 {
 108   VA (verr (status, format, ap))
 109 }
 110
 111 void
 112 errx (int status, const char *format, ...)
 113 {
 114   VA (verrx (status, format, ap))
 115 }