xref: /aosp_15_r20/external/strace/eventfd.c (revision cf84ac9a129d8ea9952db616b4e9b904c4bdde56)

/*
 * Copyright (c) 2007 Ulrich Drepper <[email protected]>
 * Copyright (c) 2008-2015 Dmitry V. Levin <[email protected]>
 * 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"
#include <fcntl.h>
#ifdef HAVE_SYS_EVENTFD_H
# include <sys/eventfd.h>
#endif

#include "xlat/efd_flags.h"

static int
do_eventfd(struct tcb *tcp, int flags_arg)
{
	tprintf("%u", (unsigned int) tcp->u_arg[0]);
	if (flags_arg >= 0) {
		tprints(", ");
		printflags(efd_flags, tcp->u_arg[flags_arg], "EFD_???");
	}

	return RVAL_DECODED | RVAL_FD;
}

SYS_FUNC(eventfd)
{
	return do_eventfd(tcp, -1);
}

SYS_FUNC(eventfd2)
{
	return do_eventfd(tcp, 1);
}