sendfile.c

/*
 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
 * Copyright (c) 2015-2017 The strace developers.
 * 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. 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 "defs.h"

SYS_FUNC(sendfile64)
{
	if (entering(tcp)) {
		printfd(tcp, tcp->u_arg[0]);
		tprints(", ");
		printfd(tcp, tcp->u_arg[1]);
		tprints(", ");
		if (!printnum_int64(tcp, tcp->u_arg[2], "%" PRIu64)) {
			tprintf(", %" PRI_klu, tcp->u_arg[3]);
			return RVAL_DECODED;
		}
	} else {
		if (!syserror(tcp) && tcp->u_rval) {
			tprints(" => ");
			printnum_int64(tcp, tcp->u_arg[2], "%" PRIu64);
		}
		tprintf(", %" PRI_klu, tcp->u_arg[3]);
	}

	return 0;
}

SYS_FUNC(sendfile)
{
	if (entering(tcp)) {
		printfd(tcp, tcp->u_arg[0]);
		tprints(", ");
		printfd(tcp, tcp->u_arg[1]);
		tprints(", ");
		if (!printnum_ulong(tcp, tcp->u_arg[2])
		    || !tcp->u_arg[3]) {
			tprintf(", %" PRI_klu, tcp->u_arg[3]);
			return RVAL_DECODED;
		}
	} else {
		if (!syserror(tcp) && tcp->u_rval) {
			tprints(" => ");
			printnum_ulong(tcp, tcp->u_arg[2]);
		}
		tprintf(", %" PRI_klu, tcp->u_arg[3]);
	}

	return 0;
}