FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_pipe.c

     /*      $NetBSD: linux_pipe.c,v 1.53 2003/01/18 21:21:28 thorpej Exp $  */
     
     /*-
      * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Frank van der Linden and Eric Haszlakiewicz.
      *
     * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * 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: linux_pipe.c,v 1.53 2003/01/18 21:21:28 thorpej Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/mbuf.h>
    #include <sys/mman.h>
    #include <sys/mount.h>
    
    #include <sys/sa.h>
    #include <sys/syscallargs.h>
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_mmap.h>
    #include <compat/linux/common/linux_signal.h>
    
    #include <compat/linux/linux_syscallargs.h>
    
    /* Used on: arm, i386, m68k, ppc */
    /* Not used on: alpha, mips, sparc, sparc64 */
    /* Alpha, mips, sparc and sparc64 pass one of the fds in a register */
    
    /*
     * NetBSD passes fd[0] in retval[0], and fd[1] in retval[1].
     * Linux directly passes the pointer.
     */
    int
    linux_sys_pipe(l, v, retval)
            struct lwp *l;
            void *v;
            register_t *retval;
    {
            struct linux_sys_pipe_args /* {
                    syscallarg(int *) pfds;
            } */ *uap = v;
            int error;
    
            if ((error = sys_pipe(l, 0, retval)))
                    return error;
    
            /* Assumes register_t is an int */
            if ((error = copyout(retval, SCARG(uap, pfds), 2 * sizeof (int))))
                    return error;
    
            retval[0] = 0;
            return 0;
    }

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