xref: /freebsd/lib/libc/stdio/xprintf_errno.c (revision aa66995b4c804cbb579f71645d97fe282a798bfc)

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2005 Poul-Henning Kamp
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <namespace.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#include <vis.h>
#include <assert.h>
#include <sys/time.h>
#include "errlst.h"
#include "printf.h"

int
__printf_arginfo_errno(const struct printf_info *pi __unused, size_t n,
    int *argt)
{

	assert(n >= 1);
	argt[0] = PA_INT;
	return (1);
}

int
__printf_render_errno(struct __printf_io *io, const struct printf_info *pi
    __unused, const void *const *arg)
{
	int ret, error;
	char buf[64];
	char errnomsg[NL_TEXTMAX];

	ret = 0;
	error = *((const int *)arg[0]);
	if (error >= 0 && error < __hidden_sys_nerr) {
		strerror_r(error, errnomsg, sizeof(errnomsg));
		return (__printf_out(io, pi, errnomsg, strlen(errnomsg)));
	}
	sprintf(buf, "errno=%d/0x%x", error, error);
	ret += __printf_out(io, pi, buf, strlen(buf));
	__printf_flush(io);
	return(ret);
}