[src/trunk]: src/sys Add FORK_CLEANFILES flag to fork1(), which makes the new...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b0a3a1144b84
branches:  trunk
changeset: 534920:b0a3a1144b84
user:      pooka <pooka%NetBSD.org@localhost>
date:      Tue Aug 06 13:58:08 2002 +0000

description:
Add FORK_CLEANFILES flag to fork1(), which makes the new process start out
with a clean descriptor set (ie. not copied or shared from parent).

for rfork()

diffstat:

 sys/kern/kern_fork.c |  6 ++++--
 sys/sys/proc.h       |  3 ++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diffs (44 lines):

diff -r 05faf8745bcd -r b0a3a1144b84 sys/kern/kern_fork.c
--- a/sys/kern/kern_fork.c      Tue Aug 06 13:55:03 2002 +0000
+++ b/sys/kern/kern_fork.c      Tue Aug 06 13:58:08 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_fork.c,v 1.90 2002/07/11 10:37:26 pooka Exp $     */
+/*     $NetBSD: kern_fork.c,v 1.91 2002/08/06 13:58:08 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 1.90 2002/07/11 10:37:26 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.91 2002/08/06 13:58:08 pooka Exp $");
 
 #include "opt_ktrace.h"
 #include "opt_systrace.h"
@@ -381,6 +381,8 @@
 
        if (flags & FORK_SHAREFILES)
                fdshare(p1, p2);
+       else if (flags & FORK_CLEANFILES)
+               p2->p_fd = fdinit(p1);
        else
                p2->p_fd = fdcopy(p1);
 
diff -r 05faf8745bcd -r b0a3a1144b84 sys/sys/proc.h
--- a/sys/sys/proc.h    Tue Aug 06 13:55:03 2002 +0000
+++ b/sys/sys/proc.h    Tue Aug 06 13:58:08 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: proc.h,v 1.142 2002/07/25 20:04:04 jdolecek Exp $      */
+/*     $NetBSD: proc.h,v 1.143 2002/08/06 13:58:09 pooka Exp $ */
 
 /*-
  * Copyright (c) 1986, 1989, 1991, 1993
@@ -367,6 +367,7 @@
 #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        FORK_CLEANFILES 0x40            /* Start with a clean descriptor set */
 
 #define        PIDHASH(pid)    (&pidhashtbl[(pid) & pidhash])
 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;