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error.c

/* error.c -- error handler for noninteractive utilities
   Copyright (C) 1990, 91, 92, 93, 94, 1995
   Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Written by David MacKenzie <djm@gnu.ai.mit.edu>.  */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <sys/types.h>

#if defined(HAVE_VPRINTF) || defined(HAVE_DOPRNT)
# if __STDC__
#  include <stdarg.h>
#  define VA_START(args, lastarg) va_start(args, lastarg)
# else
#  include <varargs.h>
#  define VA_START(args, lastarg) va_start(args)
# endif
#else
# define va_alist a1, a2, a3, a4, a5, a6, a7, a8
# define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
#endif

#if STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#else
void exit ();
#endif

#ifdef HAVE_LIBINTL_H
# include <libintl.h>
#endif

#define _(str) (str)

/* The calling program should define program_name and set it to the
   name of the executing program.  */
extern char *program_name;

#ifdef HAVE_STRERROR
char *strerror ();
#else
extern char *sys_errlist[];
extern int sys_nerr;

/* bit of a pointless prorotype, but still ... */
static char *private_strerror (int errnum);
static char *
private_strerror (errnum)
     int errnum;
{
  if (errnum > 0 && errnum <= sys_nerr)
    return sys_errlist[errnum];
  return _("Unknown system error");
}
#define strerror private_strerror
#endif

/* Print the program name and error message MESSAGE, which is a printf-style
   format string with optional args.
   If ERRNUM is nonzero, print its corresponding system error message.
   Exit with status STATUS if it is nonzero.  */
/* VARARGS */

void
#if defined(VA_START) && __STDC__
error (int status, int errnum, const char *message, ...)
#else
error (status, errnum, message, va_alist)
     int status;
     int errnum;
     char *message;
     va_dcl
#endif
{
#ifdef VA_START
  va_list args;
#endif

  fflush (stdout);
  fprintf (stderr, "%s: ", program_name);

#ifdef VA_START
  VA_START (args, message);
# if HAVE_VPRINTF
  vfprintf (stderr, message, args);
# else
  _doprnt (message, args, stderr);
# endif
  va_end (args);
#else
  fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
#endif

  if (errnum)
    fprintf (stderr, ": %s", strerror (errnum));
  putc ('\n', stderr);
  fflush (stderr);
  if (status)
    exit (status);
}

void
#if defined(VA_START) && __STDC__
error_with_loc (int status, int errnum, const char *file_name,
            size_t line_number, const char *message, ...)
#else
error_with_loc (status, errnum, file_name, line_number, message, va_alist)
     int status;
     int errnum;
     char *file_name;
     size_t line_number;
     char *message;
     va_dcl
#endif
{
#ifdef VA_START
  va_list args;
#endif

  fflush (stdout);
  fprintf (stderr, "%s:", program_name);

  if (file_name != NULL)
    fprintf (stderr, "%s:%d: ", file_name, (unsigned int)line_number);

#ifdef VA_START
  VA_START (args, message);
# ifdef HAVE_VPRINTF
  vfprintf (stderr, message, args);
# else
  _doprnt (message, args, stderr);
# endif
  va_end (args);
#else
  fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
#endif

  if (errnum)
    fprintf (stderr, ": %s", strerror (errnum));
  putc ('\n', stderr);
  fflush (stderr);
  if (status)
    exit (status);
}


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