[src/trunk]: src Expose the kernel's boothowto(9) variable through the sysctl

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

details:   https://anonhg.NetBSD.org/src/rev/a27194d60069
branches:  trunk
changeset: 747330:a27194d60069
user:      apb <apb%NetBSD.org@localhost>
date:      Fri Sep 11 18:14:58 2009 +0000

description:
Expose the kernel's boothowto(9) variable through the sysctl
kern.boothowto variable.

Part of the /etc/rc silent changes requested in PR 41946
and proposed in tech-userlevel.

diffstat:

 doc/CHANGES                |   3 ++-
 share/man/man7/sysctl.7    |   6 +++++-
 share/man/man9/boothowto.9 |   8 +++++++-
 sys/kern/init_sysctl.c     |  10 ++++++++--
 4 files changed, 22 insertions(+), 5 deletions(-)

diffs (94 lines):

diff -r 6fa1491e871a -r a27194d60069 doc/CHANGES
--- a/doc/CHANGES       Fri Sep 11 16:01:58 2009 +0000
+++ b/doc/CHANGES       Fri Sep 11 18:14:58 2009 +0000
@@ -1,4 +1,4 @@
-# LIST OF CHANGES FROM LAST RELEASE:                   <$Revision: 1.1286 $>
+# LIST OF CHANGES FROM LAST RELEASE:                   <$Revision: 1.1287 $>
 #
 #
 # [Note: This file does not mention every change made to the NetBSD source tree.
@@ -388,3 +388,4 @@
        sysinst(8): Install the new modules.tgz set. [jnemeth 20090907]
        build.sh: Add a modules operation which builds kernel modules and
                installs them into DESTDIR. [jnemeth 20090907]
+       sysctl(7): Add kern.boothowto variable.  [apb 20090911]
diff -r 6fa1491e871a -r a27194d60069 share/man/man7/sysctl.7
--- a/share/man/man7/sysctl.7   Fri Sep 11 16:01:58 2009 +0000
+++ b/share/man/man7/sysctl.7   Fri Sep 11 18:14:58 2009 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: sysctl.7,v 1.22 2009/05/18 00:41:53 snj Exp $
+.\"    $NetBSD: sysctl.7,v 1.23 2009/09/11 18:14:58 apb Exp $
 .\"
 .\" Copyright (c) 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -341,6 +341,10 @@
 all non-root processes are immediately lowered.
 .It Li kern.autoniceval ( KERN_AUTONICEVAL )
 The priority assigned for automatically niced processes.
+.It Li kern.boothowto
+Flags passed from the boot loader; see
+.Xr reboot 2
+for the meanings of the flags.
 .It Li kern.boottime ( KERN_BOOTTIME )
 A
 .Va struct timeval
diff -r 6fa1491e871a -r a27194d60069 share/man/man9/boothowto.9
--- a/share/man/man9/boothowto.9        Fri Sep 11 16:01:58 2009 +0000
+++ b/share/man/man9/boothowto.9        Fri Sep 11 18:14:58 2009 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: boothowto.9,v 1.2 2009/09/05 11:32:36 wiz Exp $
+.\"    $NetBSD: boothowto.9,v 1.3 2009/09/11 18:14:58 apb Exp $
 .\"
 .\" Copyright (c) 2009 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -51,6 +51,10 @@
 .Dq Sy AB_ Ns No *
 symbols in
 .In sys/reboot.h .
+The value is made available via the
+.Xr sysctl 7
+variable
+.Va kern.boothowto .
 .Pp
 The
 .Dv BOOT_FLAG
@@ -254,6 +258,8 @@
 .Xr ddb 4 ,
 .\" RB_USERCONF
 .Xr userconf 4 ,
+.\" sysctl kern.boothowto
+.Xr sysctl 7
 .\" sets boothowto
 .Xr boot 8 ,
 .\" .Xr crash 8 ,
diff -r 6fa1491e871a -r a27194d60069 sys/kern/init_sysctl.c
--- a/sys/kern/init_sysctl.c    Fri Sep 11 16:01:58 2009 +0000
+++ b/sys/kern/init_sysctl.c    Fri Sep 11 18:14:58 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: init_sysctl.c,v 1.165 2009/08/16 20:28:19 christos Exp $ */
+/*     $NetBSD: init_sysctl.c,v 1.166 2009/09/11 18:14:58 apb Exp $ */
 
 /*-
  * Copyright (c) 2003, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: init_sysctl.c,v 1.165 2009/08/16 20:28:19 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: init_sysctl.c,v 1.166 2009/09/11 18:14:58 apb Exp $");
 
 #include "opt_sysv.h"
 #include "opt_compat_netbsd32.h"
@@ -446,6 +446,12 @@
 #endif /* _POSIX_SAVED_IDS */
                       NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL);
        sysctl_createv(clog, 0, NULL, NULL,
+                      CTLFLAG_PERMANENT|CTLFLAG_HEX,
+                      CTLTYPE_INT, "boothowto",
+                      SYSCTL_DESCR("Flags from boot loader"),
+                      NULL, 0, &boothowto, sizeof(boothowto),
+                      CTL_KERN, CTL_CREATE, CTL_EOL);
+       sysctl_createv(clog, 0, NULL, NULL,
                       CTLFLAG_PERMANENT,
                       CTLTYPE_STRUCT, "boottime",
                       SYSCTL_DESCR("System boot time"),