402 lines
9.4 KiB
C
402 lines
9.4 KiB
C
/* Error handler for noninteractive utilities
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Copyright (C) 1990-1998, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library. Its master source is NOT part of
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the C library, however. The master source lives in /gd/gnu/lib.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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/* $FreeBSD$ */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#if HAVE_LIBINTL_H
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# include <libintl.h>
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#endif
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#ifdef _LIBC
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# include <wchar.h>
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# define mbsrtowcs __mbsrtowcs
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#endif
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#if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
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# if __STDC__
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# include <stdarg.h>
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# define VA_START(args, lastarg) va_start(args, lastarg)
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# else
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# include <varargs.h>
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# define VA_START(args, lastarg) va_start(args)
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# endif
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#else
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# define va_alist a1, a2, a3, a4, a5, a6, a7, a8
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# define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
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#endif
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#if STDC_HEADERS || _LIBC
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# include <stdlib.h>
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# include <string.h>
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#else
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void exit ();
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#endif
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#include "error.h"
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#ifndef HAVE_DECL_STRERROR_R
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"this configure-time declaration test was not run"
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#endif
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#if !HAVE_DECL_STRERROR_R
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char *strerror_r ();
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#endif
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#ifndef _
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# define _(String) String
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#endif
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/* If NULL, error will flush stdout, then print on stderr the program
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name, a colon and a space. Otherwise, error will call this
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function without parameters instead. */
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void (*error_print_progname) (
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#if __STDC__ - 0
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void
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#endif
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);
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/* This variable is incremented each time `error' is called. */
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unsigned int error_message_count;
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#ifdef _LIBC
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/* In the GNU C library, there is a predefined variable for this. */
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# define program_name program_invocation_name
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# include <errno.h>
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/* In GNU libc we want do not want to use the common name `error' directly.
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Instead make it a weak alias. */
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extern void __error (int status, int errnum, const char *message, ...)
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__attribute__ ((__format__ (__printf__, 3, 4)));
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extern void __error_at_line (int status, int errnum, const char *file_name,
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unsigned int line_number, const char *message,
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...)
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__attribute__ ((__format__ (__printf__, 5, 6)));;
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# define error __error
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# define error_at_line __error_at_line
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# ifdef USE_IN_LIBIO
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# include <libio/iolibio.h>
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# define fflush(s) _IO_fflush (s)
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# endif
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#else /* not _LIBC */
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/* The calling program should define program_name and set it to the
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name of the executing program. */
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extern char *program_name;
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# ifdef HAVE_STRERROR_R
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# define __strerror_r strerror_r
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# else
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# if HAVE_STRERROR
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# ifndef strerror /* On some systems, strerror is a macro */
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char *strerror ();
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# endif
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# else
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static char *
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private_strerror (errnum)
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int errnum;
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{
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extern char *sys_errlist[];
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extern int sys_nerr;
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if (errnum > 0 && errnum <= sys_nerr)
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return _(sys_errlist[errnum]);
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return _("Unknown system error");
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}
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# define strerror private_strerror
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# endif /* HAVE_STRERROR */
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# endif /* HAVE_STRERROR_R */
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#endif /* not _LIBC */
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#ifdef VA_START
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static void
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error_tail (int status, int errnum, const char *message, va_list args)
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{
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# if HAVE_VPRINTF || _LIBC
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# if _LIBC && USE_IN_LIBIO
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if (_IO_fwide (stderr, 0) > 0)
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{
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# define ALLOCA_LIMIT 2000
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size_t len = strlen (message) + 1;
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wchar_t *wmessage = NULL;
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mbstate_t st;
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size_t res;
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const char *tmp;
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do
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{
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if (len < ALLOCA_LIMIT)
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wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
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else
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{
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if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
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wmessage = NULL;
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wmessage = (wchar_t *) realloc (wmessage,
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len * sizeof (wchar_t));
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if (wmessage == NULL)
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{
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fputws_unlocked (L"out of memory\n", stderr);
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return;
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}
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}
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memset (&st, '\0', sizeof (st));
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tmp =message;
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}
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while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
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if (res == (size_t) -1)
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/* The string cannot be converted. */
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wmessage = (wchar_t *) L"???";
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__vfwprintf (stderr, wmessage, args);
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}
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else
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# endif
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vfprintf (stderr, message, args);
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# else
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_doprnt (message, args, stderr);
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# endif
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va_end (args);
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++error_message_count;
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if (errnum)
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{
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# if defined HAVE_STRERROR_R || _LIBC
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char errbuf[1024];
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/* Don't use __strerror_r's return value because on some systems
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(at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
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(void)__strerror_r (errnum, errbuf, sizeof errbuf);
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char *s = errbuf;
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# if _LIBC && USE_IN_LIBIO
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if (_IO_fwide (stderr, 0) > 0)
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__fwprintf (stderr, L": %s", s);
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else
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# endif
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fprintf (stderr, ": %s", s);
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# else
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fprintf (stderr, ": %s", strerror (errnum));
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# endif
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}
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# if _LIBC && USE_IN_LIBIO
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if (_IO_fwide (stderr, 0) > 0)
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putwc (L'\n', stderr);
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else
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# endif
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putc ('\n', stderr);
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fflush (stderr);
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if (status)
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exit (status);
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}
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#endif
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/* Print the program name and error message MESSAGE, which is a printf-style
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format string with optional args.
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If ERRNUM is nonzero, print its corresponding system error message.
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Exit with status STATUS if it is nonzero. */
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/* VARARGS */
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void
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#if defined VA_START && __STDC__
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error (int status, int errnum, const char *message, ...)
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#else
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error (status, errnum, message, va_alist)
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int status;
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int errnum;
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char *message;
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va_dcl
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#endif
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{
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#ifdef VA_START
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va_list args;
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#endif
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fflush (stdout);
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#ifdef _LIBC
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# ifdef USE_IN_LIBIO
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_IO_flockfile (stderr);
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# else
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__flockfile (stderr);
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# endif
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#endif
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if (error_print_progname)
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(*error_print_progname) ();
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else
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{
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#if _LIBC && USE_IN_LIBIO
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if (_IO_fwide (stderr, 0) > 0)
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__fwprintf (stderr, L"%s: ", program_name);
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else
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#endif
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fprintf (stderr, "%s: ", program_name);
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}
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#ifdef VA_START
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VA_START (args, message);
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error_tail (status, errnum, message, args);
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#else
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fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
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++error_message_count;
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if (errnum)
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{
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# if defined HAVE_STRERROR_R || _LIBC
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char errbuf[1024];
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/* Don't use __strerror_r's return value because on some systems
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(at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
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__strerror_r (errnum, errbuf, sizeof errbuf);
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fprintf (stderr, ": %s", errbuf);
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# else
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fprintf (stderr, ": %s", strerror (errnum));
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# endif
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}
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putc ('\n', stderr);
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fflush (stderr);
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if (status)
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exit (status);
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#endif
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#ifdef _LIBC
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# ifdef USE_IN_LIBIO
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_IO_funlockfile (stderr);
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# else
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__funlockfile (stderr);
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# endif
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#endif
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}
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/* Sometimes we want to have at most one error per line. This
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variable controls whether this mode is selected or not. */
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int error_one_per_line;
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void
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#if defined VA_START && __STDC__
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error_at_line (int status, int errnum, const char *file_name,
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unsigned int line_number, const char *message, ...)
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#else
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error_at_line (status, errnum, file_name, line_number, message, va_alist)
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int status;
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int errnum;
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const char *file_name;
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unsigned int line_number;
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char *message;
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va_dcl
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#endif
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{
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#ifdef VA_START
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va_list args;
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#endif
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if (error_one_per_line)
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{
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static const char *old_file_name;
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static unsigned int old_line_number;
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if (old_line_number == line_number
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&& (file_name == old_file_name
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|| strcmp (old_file_name, file_name) == 0))
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/* Simply return and print nothing. */
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return;
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old_file_name = file_name;
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old_line_number = line_number;
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}
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fflush (stdout);
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#ifdef _LIBC
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# ifdef USE_IN_LIBIO
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_IO_flockfile (stderr);
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# else
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__flockfile (stderr);
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# endif
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#endif
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if (error_print_progname)
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(*error_print_progname) ();
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else
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{
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#if _LIBC && USE_IN_LIBIO
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if (_IO_fwide (stderr, 0) > 0)
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__fwprintf (stderr, L"%s: ", program_name);
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else
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#endif
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fprintf (stderr, "%s:", program_name);
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}
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if (file_name != NULL)
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{
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#if _LIBC && USE_IN_LIBIO
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if (_IO_fwide (stderr, 0) > 0)
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__fwprintf (stderr, L"%s:%d: ", file_name, line_number);
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else
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#endif
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fprintf (stderr, "%s:%d: ", file_name, line_number);
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}
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#ifdef VA_START
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VA_START (args, message);
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error_tail (status, errnum, message, args);
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#else
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fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
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++error_message_count;
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if (errnum)
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{
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# if defined HAVE_STRERROR_R || _LIBC
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char errbuf[1024];
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/* Don't use __strerror_r's return value because on some systems
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(at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
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__strerror_r (errnum, errbuf, sizeof errbuf);
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fprintf (stderr, ": %s", errbuf);
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# else
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fprintf (stderr, ": %s", strerror (errnum));
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# endif
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}
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putc ('\n', stderr);
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fflush (stderr);
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if (status)
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exit (status);
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#endif
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#ifdef _LIBC
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# ifdef USE_IN_LIBIO
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_IO_funlockfile (stderr);
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# else
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__funlockfile (stderr);
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# endif
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#endif
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}
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#ifdef _LIBC
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/* Make the weak alias. */
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# undef error
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# undef error_at_line
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weak_alias (__error, error)
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weak_alias (__error_at_line, error_at_line)
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#endif
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