13f8d2ce5f
Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(), vfs_sysctl(), etc, routines, along with sysctl_int() et al. Now all nodes are registered with the tree, and nodes can be added (or removed) easily, and I/O to and from the tree is handled generically. Since the nodes are registered with the tree, the mapping from name to number (and back again) can now be discovered, instead of having to be hard coded. Adding new nodes to the tree is likewise much simpler -- the new infrastructure handles almost all the work for simple types, and just about anything else can be done with a small helper function. All existing nodes are where they were before (numerically speaking), so all existing consumers of sysctl information should notice no difference. PS - I'm sorry, but there's a distinct lack of documentation at the moment. I'm working on sysctl(3/8/9) right now, and I promise to watch out for buses.
235 lines
6.6 KiB
C
235 lines
6.6 KiB
C
/* $NetBSD: netbsd32_sysctl.c,v 1.12 2003/12/04 19:38:23 atatat Exp $ */
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/*
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Brown.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: netbsd32_sysctl.c,v 1.12 2003/12/04 19:38:23 atatat Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_ddb.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <sys/sa.h>
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#include <sys/syscallargs.h>
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#include <sys/proc.h>
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#define __SYSCTL_PRIVATE
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#include <sys/sysctl.h>
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#include <uvm/uvm_extern.h>
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#include <compat/netbsd32/netbsd32.h>
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#include <compat/netbsd32/netbsd32_syscall.h>
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#include <compat/netbsd32/netbsd32_syscallargs.h>
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#include <compat/netbsd32/netbsd32_conv.h>
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#if defined(DDB)
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#include <ddb/ddbvar.h>
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#endif
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struct sysctlnode netbsd32_sysctl_root = {
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.sysctl_flags = SYSCTL_ROOT|CTLTYPE_NODE,
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.sysctl_num = 0,
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.sysctl_size = sizeof(struct sysctlnode),
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.sysctl_name = "(netbsd32_root)",
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};
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/*
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* sysctl helper routine for netbsd32's kern.boottime node
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*/
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static int
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netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS)
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{
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struct sysctlnode node;
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struct netbsd32_timeval bt32;
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netbsd32_from_timeval(&boottime, &bt32);
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node = *rnode;
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node.sysctl_data = &bt32;
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return (sysctl_lookup(SYSCTLFN_CALL(&node)));
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}
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/*
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* sysctl helper routine for netbsd32's vm.loadavg node
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*/
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static int
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netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS)
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{
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struct sysctlnode node;
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struct netbsd32_loadavg av32;
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netbsd32_from_loadavg(&av32, &averunnable);
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node = *rnode;
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node.sysctl_data = &av32;
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return (sysctl_lookup(SYSCTLFN_CALL(&node)));
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}
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SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "sysctl netbsd32 shadow tree setup")
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{
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extern char machine_arch32[];
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struct sysctlnode *r;
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r = &netbsd32_sysctl_root;
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sysctl_createv(SYSCTL_PERMANENT,
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CTLTYPE_NODE, "kern", &r,
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NULL, 0, NULL, 0,
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CTL_KERN, CTL_EOL);
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r = &netbsd32_sysctl_root;
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sysctl_createv(SYSCTL_PERMANENT,
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CTLTYPE_STRUCT, "boottime", &r,
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netbsd32_sysctl_kern_boottime, 0, NULL,
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sizeof(struct netbsd32_timeval),
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CTL_KERN, KERN_BOOTTIME, CTL_EOL);
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r = &netbsd32_sysctl_root;
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sysctl_createv(SYSCTL_PERMANENT,
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CTLTYPE_NODE, "vm", &r,
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NULL, 0, NULL, 0,
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CTL_VM, CTL_EOL);
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r = &netbsd32_sysctl_root;
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sysctl_createv(SYSCTL_PERMANENT,
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CTLTYPE_STRUCT, "loadavg", &r,
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netbsd32_sysctl_vm_loadavg, 0, NULL,
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sizeof(struct netbsd32_loadavg),
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CTL_VM, VM_LOADAVG, CTL_EOL);
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r = &netbsd32_sysctl_root;
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sysctl_createv(SYSCTL_PERMANENT,
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CTLTYPE_NODE, "hw", &r,
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NULL, 0, NULL, 0,
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CTL_HW, CTL_EOL);
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r = &netbsd32_sysctl_root;
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sysctl_createv(SYSCTL_PERMANENT,
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CTLTYPE_STRING, "machine_arch", &r,
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NULL, 0, machine_arch32, 0,
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CTL_HW, HW_MACHINE_ARCH, CTL_EOL);
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}
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int
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netbsd32___sysctl(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct netbsd32___sysctl_args /* {
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syscallarg(netbsd32_intp) name;
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syscallarg(u_int) namelen;
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syscallarg(netbsd32_voidp) old;
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syscallarg(netbsd32_size_tp) oldlenp;
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syscallarg(netbsd32_voidp) new;
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syscallarg(netbsd32_size_t) newlen;
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} */ *uap = v;
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struct sysctlnode *pnode;
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netbsd32_size_t netbsd32_oldlen;
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size_t oldlen, *oldlenp, savelen;
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int name[CTL_MAXNAME], error, nerror, *namep;
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void *newp, *oldp;
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/*
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* get and convert 32 bit size_t to native size_t
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*/
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namep = NETBSD32PTR64(SCARG(uap, name));
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oldp = NETBSD32PTR64(SCARG(uap, old));
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newp = NETBSD32PTR64(SCARG(uap, new));
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oldlenp = NETBSD32PTR64(SCARG(uap, oldlenp));
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oldlen = 0;
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if (oldlenp != NULL) {
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error = copyin(oldlenp, &netbsd32_oldlen,
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sizeof(netbsd32_oldlen));
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if (error)
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return (error);
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oldlen = netbsd32_oldlen;
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}
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savelen = oldlen;
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/*
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* retrieve name and see if we need to dispatch this query to
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* the shadow tree. if we find it in the shadow tree,
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* dispatch to there, otherwise NULL means use the built-in
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* default main tree.
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*/
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if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1)
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return (EINVAL);
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error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int));
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if (error)
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return (error);
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/*
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* wire old so that copyout() is less likely to fail?
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*/
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error = sysctl_lock(l, oldp, savelen);
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if (error)
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return (error);
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pnode = &netbsd32_sysctl_root;
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error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL);
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pnode = (error == 0) ? &netbsd32_sysctl_root : NULL;
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error = sysctl_dispatch(&name[0], SCARG(uap, namelen),
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oldp, &oldlen,
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newp, SCARG(uap, newlen),
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&name[0], l, pnode);
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/*
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* release the sysctl lock
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*/
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sysctl_unlock(l);
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/*
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* reset caller's oldlen, even if we got an error
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*/
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if (oldlenp) {
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netbsd32_oldlen = oldlen;
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nerror = copyout(&netbsd32_oldlen, oldlenp,
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sizeof(netbsd32_oldlen));
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if (error == 0)
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error = nerror;
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}
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/*
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* if the only problem is that we weren't given enough space,
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* that's an ENOMEM error
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*/
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if (error == 0 && oldp != NULL && savelen < oldlen)
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error = ENOMEM;
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return (error);
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}
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