misc/err.c

   1 /* err.c --- 4.4BSD utility functions for error messages.
   2    Copyright (C) 1995, 1996, 1998 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    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 #ifdef USE_IN_LIBIO
  28 # define flockfile(s) _IO_flockfile (s)
  29 # define funlockfile(s) _IO_funlockfile (s)
  30 #endif
  31
  32 extern char *__progname;
  33
  34 #define VA(call)                                                              \
  35 {                                                                             \
  36   va_list ap;                                                                 \
  37   va_start (ap, format);                                                      \
  38   call;                                                                       \
  39   va_end (ap);                                                                \
  40 }
  41
  42 void
  43 vwarnx (const char *format, __gnuc_va_list ap)
  44 {
  45   flockfile (stderr);
  46   if (__progname)
  47     fprintf (stderr, "%s: ", __progname);
  48   if (format)
  49     vfprintf (stderr, format, ap);
  50   putc_unlocked ('\n', stderr);
  51   funlockfile (stderr);
  52 }
  53
  54 void
  55 vwarn (const char *format, __gnuc_va_list ap)
  56 {
  57   int error = errno;
  58
  59   flockfile (stderr);
  60   if (__progname)
  61     fprintf (stderr, "%s: ", __progname);
  62   if (format)
  63     {
  64       vfprintf (stderr, format, ap);
  65       fputs_unlocked (": ", stderr);
  66     }
  67   __set_errno (error);
  68   fprintf (stderr, "%m\n");
  69   funlockfile (stderr);
  70 }
  71
  72
  73 void
  74 warn (const char *format, ...)
  75 {
  76   VA (vwarn (format, ap))
  77 }
  78
  79 void
  80 warnx (const char *format, ...)
  81 {
  82   VA (vwarnx (format, ap))
  83 }
  84
  85 void
  86 verr (int status, const char *format, __gnuc_va_list ap)
  87 {
  88   vwarn (format, ap);
  89   exit (status);
  90 }
  91
  92 void
  93 verrx (int status, const char *format, __gnuc_va_list ap)
  94 {
  95   vwarnx (format, ap);
  96   exit (status);
  97 }
  98
  99 void
 100 err (int status, const char *format, ...)
 101 {
 102   VA (verr (status, format, ap))
 103 }
 104
 105 void
 106 errx (int status, const char *format, ...)
 107 {
 108   VA (verrx (status, format, ap))
 109 }