misc/err.c

   1 /* 4.4BSD utility functions for error messages.
   2    Copyright (C) 1995-2023 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    <https://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_internal (const char *format, __gnuc_va_list ap,
  42                    unsigned int mode_flags)
  43 {
  44   flockfile (stderr);
  45   __fxprintf (stderr, "%s: ", __progname);
  46   if (format != NULL)
  47     __vfxprintf (stderr, format, ap, mode_flags);
  48   __fxprintf (stderr, "\n");
  49   funlockfile (stderr);
  50 }
  51
  52 void
  53 __vwarn_internal (const char *format, __gnuc_va_list ap,
  54                    unsigned int mode_flags)
  55 {
  56   int error = errno;
  57
  58   flockfile (stderr);
  59   if (format != NULL)
  60     {
  61       __fxprintf (stderr, "%s: ", __progname);
  62       __vfxprintf (stderr, format, ap, mode_flags);
  63       __set_errno (error);
  64       __fxprintf (stderr, ": %m\n");
  65     }
  66   else
  67     {
  68       __set_errno (error);
  69       __fxprintf (stderr, "%s: %m\n", __progname);
  70     }
  71   funlockfile (stderr);
  72 }
  73
  74 void
  75 vwarn (const char *format, __gnuc_va_list ap)
  76 {
  77   __vwarn_internal (format, ap, 0);
  78 }
  79 libc_hidden_def (vwarn)
  80
  81 void
  82 vwarnx (const char *format, __gnuc_va_list ap)
  83 {
  84   __vwarnx_internal (format, ap, 0);
  85 }
  86 libc_hidden_def (vwarnx)
  87
  88 void
  89 warn (const char *format, ...)
  90 {
  91   VA (vwarn (format, ap))
  92 }
  93 libc_hidden_def (warn)
  94
  95 void
  96 warnx (const char *format, ...)
  97 {
  98   VA (vwarnx (format, ap))
  99 }
 100 libc_hidden_def (warnx)
 101
 102 void
 103 verr (int status, const char *format, __gnuc_va_list ap)
 104 {
 105   vwarn (format, ap);
 106   exit (status);
 107 }
 108 libc_hidden_def (verr)
 109
 110 void
 111 verrx (int status, const char *format, __gnuc_va_list ap)
 112 {
 113   vwarnx (format, ap);
 114   exit (status);
 115 }
 116 libc_hidden_def (verrx)
 117
 118 void
 119 err (int status, const char *format, ...)
 120 {
 121   VA (verr (status, format, ap))
 122 }
 123
 124 void
 125 errx (int status, const char *format, ...)
 126 {
 127   VA (verrx (status, format, ap))
 128 }