kern_fork.c (be67169a57e10d3a2e09786b0268736737248f7d) kern_fork.c (74b2192ae6309fcbe617ed63389125ff0c152af2)
1/*
2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)kern_fork.c 8.6 (Berkeley) 4/8/94
1/*
2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)kern_fork.c 8.6 (Berkeley) 4/8/94
39 * $Id: kern_fork.c,v 1.48 1997/11/06 19:29:09 phk Exp $
39 * $Id: kern_fork.c,v 1.49 1997/11/20 16:36:17 bde Exp $
40 */
41
42#include "opt_ktrace.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/sysproto.h>
47#include <sys/filedesc.h>

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63
64#ifdef SMP
65static int fast_vfork = 0; /* Doesn't work on SMP yet. */
66#else
67static int fast_vfork = 1;
68#endif
69SYSCTL_INT(_kern, OID_AUTO, fast_vfork, CTLFLAG_RW, &fast_vfork, 0, "");
70
40 */
41
42#include "opt_ktrace.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/sysproto.h>
47#include <sys/filedesc.h>

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63
64#ifdef SMP
65static int fast_vfork = 0; /* Doesn't work on SMP yet. */
66#else
67static int fast_vfork = 1;
68#endif
69SYSCTL_INT(_kern, OID_AUTO, fast_vfork, CTLFLAG_RW, &fast_vfork, 0, "");
70
71static int fork1 __P((struct proc *p, int flags));
72
73/*
74 * These are the stuctures used to create a callout list for things to do
75 * when forking a process
76 */
77typedef struct fork_list_element {
78 struct fork_list_element *next;
79 forklist_fn function;
80} *fle_p;

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116
117 return (fork1(p, uap->flags));
118}
119
120
121int nprocs = 1; /* process 0 */
122static int nextpid = 0;
123
71/*
72 * These are the stuctures used to create a callout list for things to do
73 * when forking a process
74 */
75typedef struct fork_list_element {
76 struct fork_list_element *next;
77 forklist_fn function;
78} *fle_p;

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114
115 return (fork1(p, uap->flags));
116}
117
118
119int nprocs = 1; /* process 0 */
120static int nextpid = 0;
121
124static int
122int
125fork1(p1, flags)
126 register struct proc *p1;
127 int flags;
128{
129 register struct proc *p2, *pptr;
130 register uid_t uid;
131 struct proc *newproc;
132 int count;

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124 register struct proc *p1;
125 int flags;
126{
127 register struct proc *p2, *pptr;
128 register uid_t uid;
129 struct proc *newproc;
130 int count;

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