/* Error handler for noninteractive utilities   Copyright (C) 1990,91,92,93,94,95,96,97,98 Free Software Foundation, Inc.   This file is part of the GNU C Library.  Its master source is NOT part of   the C library, however.  The master source lives in /gd/gnu/lib.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Library General Public License as   published by the Free Software Foundation; either version 2 of the   License, or (at your option) any later version.   The GNU C Library 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   Library General Public License for more details.   You should have received a copy of the GNU Library General Public   License along with the GNU C Library; see the file COPYING.LIB.  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 "../src/rcsid.h"RCSID("$Id: error.c,v 1.1.1.1 2003/03/30 18:55:40 al-guest Exp $")#include <stdio.h>#if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC# 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 || _LIBC# include <stdlib.h># include <string.h>#elsevoid exit ();#endif#include "error.h"#ifndef _# define _(String) String#endif/* If NULL, error will flush stdout, then print on stderr the program   name, a colon and a space.  Otherwise, error will call this   function without parameters instead.  */void (*error_print_progname) (#if __STDC__ - 0			      void#endif			      );/* This variable is incremented each time `error' is called.  */unsigned int error_message_count;#ifdef _LIBC/* In the GNU C library, there is a predefined variable for this.  */# define program_name program_invocation_name# include <errno.h>/* In GNU libc we want do not want to use the common name `error' directly.   Instead make it a weak alias.  */# define error __error# define error_at_line __error_at_line# ifdef USE_IN_LIBIO# include <libio/iolibio.h>#  define fflush(s) _IO_fflush (s)# endif#else /* not _LIBC *//* The calling program should define program_name and set it to the   name of the executing program.  */extern char *program_name;# ifdef HAVE_STRERROR_R#  define __strerror_r strerror_r# else#  if HAVE_STRERROR#   ifndef strerror		/* On some systems, strerror is a macro */char *strerror ();#   endif#  elsestatic char *private_strerror (errnum)     int errnum;{  extern char *sys_errlist[];  extern int sys_nerr;  if (errnum > 0 && errnum <= sys_nerr)    return _(sys_errlist[errnum]);  return _("Unknown system error");}#   define strerror private_strerror#  endif /* HAVE_STRERROR */# endif	/* HAVE_STRERROR_R */#endif	/* not _LIBC *//* 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, ...)#elseerror (status, errnum, message, va_alist)     int status;     int errnum;     char *message;     va_dcl#endif{#ifdef VA_START  va_list args;#endif  if (error_print_progname)    (*error_print_progname) ();  else    {      fflush (stdout);      fprintf (stderr, "%s: ", program_name);    }#ifdef VA_START  VA_START (args, message);# if HAVE_VPRINTF || _LIBC  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  ++error_message_count;  if (errnum)    {#if defined HAVE_STRERROR_R || defined _LIBC      char errbuf[1024];      fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));#else      fprintf (stderr, ": %s", strerror (errnum));#endif    }  putc ('\n', stderr);  fflush (stderr);  if (status)    exit (status);}/* Sometimes we want to have at most one error per line.  This   variable controls whether this mode is selected or not.  */int error_one_per_line;void#if defined VA_START && __STDC__error_at_line (int status, int errnum, const char *file_name,	       unsigned int line_number, const char *message, ...)#elseerror_at_line (status, errnum, file_name, line_number, message, va_alist)     int status;     int errnum;     const char *file_name;     unsigned int line_number;     char *message;     va_dcl#endif{#ifdef VA_START  va_list args;#endif  if (error_one_per_line)    {      static const char *old_file_name;      static unsigned int old_line_number;      if (old_line_number == line_number &&	  (file_name == old_file_name || !strcmp (old_file_name, file_name)))	/* Simply return and print nothing.  */	return;      old_file_name = file_name;      old_line_number = line_number;    }  if (error_print_progname)    (*error_print_progname) ();  else    {      fflush (stdout);      fprintf (stderr, "%s:", program_name);    }  if (file_name != NULL)    fprintf (stderr, "%s:%d: ", file_name, line_number);#ifdef VA_START  VA_START (args, message);# if HAVE_VPRINTF || _LIBC  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  ++error_message_count;  if (errnum)    {#if defined HAVE_STRERROR_R || defined _LIBC      char errbuf[1024];      fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));#else      fprintf (stderr, ": %s", strerror (errnum));#endif    }  putc ('\n', stderr);  fflush (stderr);  if (status)    exit (status);}#ifdef _LIBC/* Make the weak alias.  */# undef error# undef error_at_lineweak_alias (__error, error)weak_alias (__error_at_line, error_at_line)#endif