/*      $NetBSD: kern_select_50.c,v 1.4 2023/07/28 18:19:00 christos Exp $      */

/*-
 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Christos Zoulas.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_select_50.c,v 1.4 2023/07/28 18:19:00 christos Exp $");

#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
#endif

#include <sys/param.h>
#include <sys/event.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/syscall.h>
#include <sys/syscallvar.h>
#include <sys/syscallargs.h>

#include <compat/sys/event.h>
#include <compat/sys/time.h>
#include <compat/common/compat_mod.h>

static const struct syscall_package kern_select_50_syscalls[] = {
        { SYS_compat_50_kevent, 0, (sy_call_t *)compat_50_sys_kevent },
        { SYS_compat_50_select, 0, (sy_call_t *)compat_50_sys_select },
        { SYS_compat_50_pselect, 0, (sy_call_t *)compat_50_sys_pselect },
        { SYS_compat_50_pollts, 0, (sy_call_t *)compat_50_sys_pollts },
        { 0, 0, NULL }
};

static int
compat_50_kevent_fetch_timeout(const void *src, void *dest, size_t length)
{
        struct timespec50 ts50;
        int error;

        KASSERT(length == sizeof(struct timespec));

        error = copyin(src, &ts50, sizeof(ts50));
        if (error)
                return error;
        timespec50_to_timespec(&ts50, (struct timespec *)dest);
        return 0;
}

int
compat_50_sys_kevent(struct lwp *l, const struct compat_50_sys_kevent_args *uap,
    register_t *retval)
{
        /* {
                syscallarg(int) fd;
                syscallarg(struct kevent100 *) changelist;
                syscallarg(size_t) nchanges;
                syscallarg(struct kevent100 *) eventlist;
                syscallarg(size_t) nevents;
                syscallarg(struct timespec50) timeout;
        } */
        static const struct kevent_ops compat_50_kevent_ops = {
                .keo_private = NULL,
                .keo_fetch_timeout = compat_50_kevent_fetch_timeout,
                .keo_fetch_changes = compat_100___kevent50_fetch_changes,
                .keo_put_events = compat_100___kevent50_put_events,
        };

        return kevent1(retval, SCARG(uap, fd),
            (const struct kevent *)(const void *)SCARG(uap, changelist), SCARG(uap, nchanges),
            (struct kevent *)(void *)SCARG(uap, eventlist), SCARG(uap, nevents),
            (const struct timespec *)(const void *)SCARG(uap, timeout),
            &compat_50_kevent_ops);
}

int
compat_50_sys_select(struct lwp *l,
    const struct compat_50_sys_select_args *uap, register_t *retval)
{
        /* {
                syscallarg(int)                 nd;
                syscallarg(fd_set *)            in;
                syscallarg(fd_set *)            ou;
                syscallarg(fd_set *)            ex;
                syscallarg(struct timeval50 *)  tv;
        } */
        struct timespec ats, *ts = NULL;
        struct timeval50 atv50;
        int error;

        if (SCARG(uap, tv)) {
                error = copyin(SCARG(uap, tv), (void *)&atv50, sizeof(atv50));
                if (error)
                        return error;

                if (atv50.tv_usec < 0 || atv50.tv_usec >= 1000000)
                        return EINVAL;

                ats.tv_sec = atv50.tv_sec;
                ats.tv_nsec = atv50.tv_usec * 1000;
                ts = &ats;
        }

        return selcommon(retval, SCARG(uap, nd), SCARG(uap, in),
            SCARG(uap, ou), SCARG(uap, ex), ts, NULL);
}

int
compat_50_sys_pselect(struct lwp *l,
    const struct compat_50_sys_pselect_args *uap, register_t *retval)
{
        /* {
                syscallarg(int)                         nd;
                syscallarg(fd_set *)                    in;
                syscallarg(fd_set *)                    ou;
                syscallarg(fd_set *)                    ex;
                syscallarg(const struct timespec50 *)   ts;
                syscallarg(sigset_t *)                  mask;
        } */
        struct timespec50       ats50;
        struct timespec ats, *ts = NULL;
        sigset_t        amask, *mask = NULL;
        int             error;

        if (SCARG(uap, ts)) {
                error = copyin(SCARG(uap, ts), &ats50, sizeof(ats50));
                if (error)
                        return error;
                timespec50_to_timespec(&ats50, &ats);
                ts = &ats;
        }
        if (SCARG(uap, mask) != NULL) {
                error = copyin(SCARG(uap, mask), &amask, sizeof(amask));
                if (error)
                        return error;
                mask = &amask;
        }

        return selcommon(retval, SCARG(uap, nd), SCARG(uap, in),
            SCARG(uap, ou), SCARG(uap, ex), ts, mask);
}

int
compat_50_sys_pollts(struct lwp *l, const struct compat_50_sys_pollts_args *uap,
    register_t *retval)
{
        /* {
                syscallarg(struct pollfd *)             fds;
                syscallarg(u_int)                       nfds;
                syscallarg(const struct timespec50 *)   ts;
                syscallarg(const sigset_t *)            mask;
        } */
        struct timespec ats, *ts = NULL;
        struct timespec50 ats50;
        sigset_t        amask, *mask = NULL;
        int             error;

        if (SCARG(uap, ts)) {
                error = copyin(SCARG(uap, ts), &ats50, sizeof(ats50));
                if (error)
                        return error;
                timespec50_to_timespec(&ats50, &ats);
                ts = &ats;
        }
        if (SCARG(uap, mask)) {
                error = copyin(SCARG(uap, mask), &amask, sizeof(amask));
                if (error)
                        return error;
                mask = &amask;
        }

        return pollcommon(retval, SCARG(uap, fds), SCARG(uap, nfds), ts, mask);
}

int             
kern_select_50_init(void)
{               
        
return syscall_establish(NULL, kern_select_50_syscalls);
}       
        
int
kern_select_50_fini(void)
{               

return syscall_disestablish(NULL, kern_select_50_syscalls);
}