/*      $NetBSD: netbsd32_fd.c,v 1.1 2018/12/24 21:27:05 mrg Exp $      */

/*
 * Copyright (c) 1998, 2001, 2008, 2018 Matthew R. Green
 * 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 ``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.
 *
 * from: NetBSD: netbsd32_netbsd.c,v 1.221 2018/12/24 20:44:39 mrg Exp
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_fd.c,v 1.1 2018/12/24 21:27:05 mrg Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/filedesc.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/vfs_syscalls.h>
#include <sys/kauth.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscall.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_conv.h>


int
netbsd32___getfh30(struct lwp *l, const struct netbsd32___getfh30_args *uap, register_t *retval)
{
        /* {
                syscallarg(const netbsd32_charp) fname;
                syscallarg(netbsd32_fhandlep_t) fhp;
                syscallarg(netbsd32_size_tp) fh_size;
        } */
        struct vnode *vp;
        fhandle_t *fh;
        int error;
        struct pathbuf *pb;
        struct nameidata nd;
        netbsd32_size_t usz32, sz32;
        size_t sz;

        /*
         * Must be super user
         */
        error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_FILEHANDLE,
            0, NULL, NULL, NULL);
        if (error)
                return error;

        error = pathbuf_copyin(SCARG_P32(uap, fname), &pb);
        if (error) {
                return error;
        }

        NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | TRYEMULROOT, pb);
        error = namei(&nd);
        if (error) {
                pathbuf_destroy(pb);
                return error;
        }
        vp = nd.ni_vp;
        pathbuf_destroy(pb);

        error = vfs_composefh_alloc(vp, &fh);
        vput(vp);
        if (error != 0) {
                return error;
        }
        error = copyin(SCARG_P32(uap, fh_size), &usz32, sizeof(usz32));
        if (error != 0) {
                goto out;
        }
        sz = FHANDLE_SIZE(fh);
        sz32 = sz;

        error = copyout(&sz32, SCARG_P32(uap, fh_size), sizeof(sz32));
        if (error != 0) {
                goto out;
        }
        if (usz32 >= sz32) {
                error = copyout(fh, SCARG_P32(uap, fhp), sz);
        } else {
                error = E2BIG;
        }
out:
        vfs_composefh_free(fh);
        return error;
}

int
netbsd32_pipe2(struct lwp *l, const struct netbsd32_pipe2_args *uap,
               register_t *retval)
{
        /* {
                syscallarg(netbsd32_intp) fildes;
                syscallarg(int) flags;
        } */
        int fd[2], error;

        error = pipe1(l, fd, SCARG(uap, flags));
        if (error != 0)
                return error;

        error = copyout(fd, SCARG_P32(uap, fildes), sizeof(fd));
        if (error != 0)
                return error;

        retval[0] = 0;
        return 0;
}