/*
 *   Copyright (c) 1996 David Parsons. All rights reserved.
 *   
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *  3. All advertising materials mentioning features or use of this
 *     software must display the following acknowledgement:
 *     
 *   This product includes software developed by David Parsons
 *   (orc@pell.chi.il.us)
 *
 *  4. My name may not be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *     
 *  THIS SOFTWARE IS PROVIDED BY DAVID PARSONS ``AS IS'' AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 *  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID
 *  PARSONS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 *  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 *  THE POSSIBILITY OF SUCH DAMAGE.
 */
static const char rcsid[] = "$Id$";

#include "../config.h"
#include <ndialog.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#if HAVE_ERRNO_H
#include <errno.h>
#endif

/*
 * Error() spits a system error message up on the screen, (q.v. perror(3))
 * but allows a printf-style argument list and separates the errno from
 * the message with a newline.
 */
void
Error(char *fmt, ...)
{
    void *chain;
    char *bfr;
    int bfrsize;
    va_list ptr;

    bfr = alloca(bfrsize = (strlen(fmt) + 1000) );

    va_start(ptr, fmt);
    vsnprintf(bfr, bfrsize-100, fmt, ptr);
    va_end(ptr);

    if (errno != 0) {
	strcat(bfr, "\n");
	strncat(bfr, strerror(errno), 99);
    }

    chain = ObjChain(0, newOKButton(0, "OK", 0, 0));

    MENU(chain, -1, -1, "Error", bfr, ERROR_FLAG);

    deleteObjChain(chain);
} /* Error */
