NetBSD/sys/arch/atari/stand/tostools/libtos/eprintf.c

83 lines
2.4 KiB
C

/* $NetBSD: eprintf.c,v 1.1.1.1 1996/01/07 21:50:49 leo Exp $ */
/*
* Copyright (c) 1995 Waldi Ravens.
* 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 Waldi Ravens.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*/
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include "libtos.h"
static int output_redirected = 0;
void
redirect_output(fn)
char *fn;
{
int fd;
fd = creat(fn, 0666);
if (fd < 0 || dup2(fd, STDOUT_FILENO) < 0)
fatal(errno, "%s", fn);
output_redirected = 1;
}
/*
* Print output to stderr. When output is redirected,
* also write it to stdout.
*/
int
eprintf(frm)
char *frm;
{
va_list args;
int rv;
va_start(args, frm);
rv = veprintf(frm, args);
va_end(args);
return(rv);
}
int
veprintf(frm, args)
char *frm;
va_list args;
{
int rv;
rv = vfprintf(stderr, frm, args);
if (output_redirected)
vfprintf(stdout, frm, args);
return(rv);
}