pipe.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.11 */
#include <sys/sysmacros.h>
/*
* This is the loadable module wrapper.
*/
char _depends_on[] = "fs/fifofs";
longlong_t pipe();
static struct sysent pipe_sysent = {
0,
(int (*)())pipe
};
/*
* Module linkage information for the kernel.
*/
};
#ifdef _SYSCALL32_IMPL
};
#endif
static struct modlinkage modlinkage = {
&modlsys,
#ifdef _SYSCALL32_IMPL
#endif
};
int
_init(void)
{
return (mod_install(&modlinkage));
}
int
_fini(void)
{
return (EBUSY);
}
int
{
}
/*
* pipe(2) system call.
* Create a pipe by connecting two streams together. Associate
* each end of the pipe with a vnode, a file descriptor and
* one of the streams.
*/
pipe()
{
int error = 0;
rval_t r;
/*
* Allocate and initialize two vnodes.
*/
/*
* Allocate and initialize two file table entries and two
* file pointers. Each file pointer is open for read and
* write.
*/
}
goto out2;
/*
* Create two stream heads and attach to each vnode.
*/
goto out;
goto out;
}
/*
* Now fill in the entries that falloc reserved
*/
/*
* Return the file descriptors to the user. They now
* point to two different vnodes which have different
* stream heads.
*/
return (r.r_vals);
out:
out2:
}