/*      $NetBSD: linux_pipe.c,v 1.69 2021/09/23 06:56:27 ryo 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.
*
* 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 1.69 2021/09/23 06:56:27 ryo Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/fcntl.h>
#include <sys/filedesc.h>

#include <sys/sched.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/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/common/linux_fcntl.h>

#include <compat/linux/linux_syscallargs.h>

/* Used on: aarch64, arm, i386, m68k, ppc, amd64 */
/* Not used on: alpha, mips, sparc, sparc64 */
/* Alpha, mips, sparc and sparc64 pass one of the fds in a register */

#if !defined(__aarch64__)
int
linux_sys_pipe(struct lwp *l, const struct linux_sys_pipe_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(int *) pfds;
       } */
       int fd[2], error;

       if ((error = pipe1(l, fd, 0)))
               return error;

       if ((error = copyout(fd, SCARG(uap, pfds), sizeof(fd))) != 0)
               return error;
       retval[0] = 0;
       return 0;
}
#endif

int
linux_sys_pipe2(struct lwp *l, const struct linux_sys_pipe2_args *uap,
   register_t *retval)
{
       /* {
               syscallarg(int *) pfds;
               syscallarg(int) flags;
       } */
       int fd[2], error, flags;

       flags = linux_to_bsd_ioflags(SCARG(uap, flags));
       if ((flags & ~(O_CLOEXEC|O_NONBLOCK)) != 0)
               return EINVAL;

       if ((error = pipe1(l, fd, flags)))
               return error;

       if ((error = copyout(fd, SCARG(uap, pfds), sizeof(fd))) != 0)
               return error;
       retval[0] = 0;
       return 0;
}