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      1 /*	$NetBSD: compat_kevent.c,v 1.4 2023/07/29 10:01:24 rin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 #include <sys/cdefs.h>
     39 #if defined(LIBC_SCCS) && !defined(lint)
     40 __RCSID("$NetBSD: compat_kevent.c,v 1.4 2023/07/29 10:01:24 rin Exp $");
     41 #endif /* LIBC_SCCS and not lint */
     42 
     43 #include "namespace.h"
     44 #define __LIBC12_SOURCE__
     45 #include <sys/time.h>
     46 #include <compat/sys/time.h>
     47 #include <sys/event.h>
     48 #include <compat/sys/event.h>
     49 #include <stdlib.h>
     50 
     51 __warn_references(kevent,
     52     "warning: reference to compatibility kevent(); include <sys/event.h> to generate correct reference")
     53 __warn_references(__kevent50,
     54     "warning: reference to compatibility __kevent50(); use kevent()")
     55 
     56 int
     57 kevent(int kq, const struct kevent100 *changelist, size_t nchanges,
     58     struct kevent100 *eventlist, size_t nevents, const struct timespec50 *ts50)
     59 {
     60 	struct timespec ts, *tsp;
     61 
     62 	if (ts50)
     63 		timespec50_to_timespec(ts50, tsp = &ts);
     64 	else
     65 		tsp = NULL;
     66         return __kevent50(kq, changelist, nchanges, eventlist, nevents, tsp);
     67 }
     68 
     69 int
     70 __kevent50(int kq, const struct kevent100 *changelist100, size_t nchanges,
     71     struct kevent100 *eventlist100, size_t nevents, const struct timespec *tsp)
     72 {
     73 	int retval;
     74 	struct kevent *changelist;
     75 	struct kevent *eventlist;
     76 
     77 	changelist = malloc(sizeof(*changelist) * nchanges);
     78 	if (changelist == NULL) {
     79 		return -1;
     80 	}
     81 
     82 	eventlist = malloc(sizeof(*eventlist) * nevents);
     83         if (eventlist == NULL) {
     84 		retval = -1;
     85 		goto leave0;
     86 	}
     87 
     88 	for (size_t i = 0; i < nchanges; i++)
     89 		kevent100_to_kevent(changelist100 + i, changelist + i);
     90 
     91 	retval = __kevent100(kq, changelist, nchanges, eventlist, nevents, tsp);
     92 	if (retval == -1)
     93 		goto leave1;
     94 
     95 	for (int i = 0; i < retval; i++)
     96 		kevent_to_kevent100(eventlist + i, eventlist100 + i);
     97 
     98 leave1:
     99 	free(eventlist);
    100 leave0:
    101 	free(changelist);
    102 	return retval;
    103 }
    104