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Add FORK_NOWAIT flag, which sets init as the parent of the forked 

process. Useful for FreeBSD rfork() emulation.

ok'd by Christos
This commit is contained in:
pooka 2002-07-11 10:37:26 +00:00
parent ef054011f7
commit 15d9246bb2
2 changed files with 6 additions and 5 deletions
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8
sys/kern/kern_fork.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_fork.c,v 1.89 2002/06/17 16:22:50 christos Exp $ */
/* $NetBSD: kern_fork.c,v 1.90 2002/07/11 10:37:26 pooka Exp $ */
/*-
* Copyright (c) 1999, 2001 The NetBSD Foundation, Inc.
@ -78,7 +78,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.89 2002/06/17 16:22:50 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.90 2002/07/11 10:37:26 pooka Exp $");
#include "opt_ktrace.h"
#include "opt_systrace.h"
@ -407,8 +407,8 @@ fork1(struct proc *p1, int flags, int exitsig, void *stack, size_t stacksize,
if (flags & FORK_PPWAIT)
p2->p_flag |= P_PPWAIT;
LIST_INSERT_AFTER(p1, p2, p_pglist);
p2->p_pptr = p1;
LIST_INSERT_HEAD(&p1->p_children, p2, p_sibling);
p2->p_pptr = (flags & FORK_NOWAIT) ? initproc : p1;
LIST_INSERT_HEAD(&p2->p_pptr->p_children, p2, p_sibling);
LIST_INIT(&p2->p_children);
callout_init(&p2->p_realit_ch);

3
sys/sys/proc.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: proc.h,v 1.140 2002/07/04 23:32:15 thorpej Exp $ */
/* $NetBSD: proc.h,v 1.141 2002/07/11 10:37:27 pooka Exp $ */
/*-
* Copyright (c) 1986, 1989, 1991, 1993
@ -366,6 +366,7 @@ do { \
#define FORK_SHARECWD 0x04 /* Share cdir/rdir/cmask */
#define FORK_SHAREFILES 0x08 /* Share file descriptors */
#define FORK_SHARESIGS 0x10 /* Share signal actions */
#define FORK_NOWAIT 0x20 /* Make init the parent of the child */
#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;