423 lines
9.7 KiB
C
423 lines
9.7 KiB
C
/* $NetBSD: darwin_sysctl.c,v 1.7 2002/12/28 00:15:23 manu Exp $ */
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/*-
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* Copyright (c) 2002 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 Emmanuel Dreyfus
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: darwin_sysctl.c,v 1.7 2002/12/28 00:15:23 manu Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/signal.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/syscallargs.h>
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#include <compat/mach/mach_types.h>
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#include <compat/mach/mach_vm.h>
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#include <compat/darwin/darwin_exec.h>
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#include <compat/darwin/darwin_sysctl.h>
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#include <compat/darwin/darwin_syscallargs.h>
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pid_t darwin_init_pid;
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static int darwin_kern_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_vm_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_vfs_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_net_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_debug_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_hw_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_machdep_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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static int darwin_user_sysctl
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(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
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int
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darwin_sys___sysctl(struct proc *p, void *v, register_t *retval)
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{
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struct darwin_sys___sysctl_args /* {
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syscallarg(int *) name;
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syscallarg(u_int) namelen;
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syscallarg(void *) oldp;
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syscallarg(size_t *) oldlenp;
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syscallarg(void *) newp;
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syscallarg(size_t) newlen;
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} */ *uap = v;
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int error;
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sysctlfn *fn;
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int name[CTL_MAXNAME];
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size_t oldlen;
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size_t savelen;
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int *namep = SCARG(uap, name);
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int namelen = SCARG(uap, namelen);
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void *oldp = SCARG(uap, oldp);
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size_t *oldlenp = SCARG(uap, oldlenp);
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void *newp = SCARG(uap, newp);
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size_t newlen = SCARG(uap, newlen);
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/*
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* all top-level sysctl names are non-terminal
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*/
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if (namelen > CTL_MAXNAME || namelen < 2)
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return EINVAL;
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if ((error = copyin(namep, &name, namelen * sizeof(int))) != 0)
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return error;
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#ifdef DEBUG_DARWIN
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{
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int i;
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printf("darwin_sys___sysctl: name = [ ");
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for (i = 0; i < namelen; i++)
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printf("%d, ", name[i]);
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printf("]\n");
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}
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#endif /* DEBUG_DARWIN */
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/*
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* Need to be root to change a value
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*/
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if ((newp != NULL) && (error = suser(p->p_ucred, &p->p_acflag)))
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return error;
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switch (name[0]) {
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case DARWIN_CTL_KERN:
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fn = darwin_kern_sysctl;
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break;
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case DARWIN_CTL_VM:
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fn = darwin_vm_sysctl;
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break;
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case DARWIN_CTL_VFS:
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fn = darwin_vfs_sysctl;
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break;
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case DARWIN_CTL_NET:
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fn = darwin_net_sysctl;
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break;
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case DARWIN_CTL_DEBUG:
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fn = darwin_debug_sysctl;
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break;
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case DARWIN_CTL_HW:
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fn = darwin_hw_sysctl;
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break;
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case DARWIN_CTL_MACHDEP:
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fn = darwin_machdep_sysctl;
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break;
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case DARWIN_CTL_USER:
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fn = darwin_user_sysctl;
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break;
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default:
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return EOPNOTSUPP;
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}
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if (oldlenp) {
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if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen))) != 0)
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return error;
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oldlenp = &oldlen;
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}
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if (oldp) {
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error = uvm_vslock(p, oldp, oldlen,
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VM_PROT_READ|VM_PROT_WRITE);
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savelen = oldlen;
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}
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error = (*fn)(name + 1, namelen - 1, oldp, oldlenp, newp, newlen, p);
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if (oldp)
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uvm_vsunlock(p, oldp, savelen);
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if (error)
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return error;
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if (oldlenp)
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error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen));
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return error;
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}
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static int
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darwin_kern_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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/* sysctl with the same definition */
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case DARWIN_KERN_OSTYPE:
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case DARWIN_KERN_OSRELEASE:
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case DARWIN_KERN_OSREV:
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case DARWIN_KERN_VERSION:
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case DARWIN_KERN_MAXVNODES:
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case DARWIN_KERN_MAXPROC:
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case DARWIN_KERN_MAXFILES:
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case DARWIN_KERN_ARGMAX:
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case DARWIN_KERN_SECURELVL:
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case DARWIN_KERN_HOSTNAME:
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case DARWIN_KERN_HOSTID:
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case DARWIN_KERN_CLOCKRATE:
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case DARWIN_KERN_VNODE:
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case DARWIN_KERN_PROC:
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case DARWIN_KERN_FILE:
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case DARWIN_KERN_PROF:
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case DARWIN_KERN_POSIX1:
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case DARWIN_KERN_NGROUPS:
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case DARWIN_KERN_JOB_CONTROL:
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case DARWIN_KERN_SAVED_IDS:
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case DARWIN_KERN_BOOTTIME:
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case DARWIN_KERN_NISDOMAINNAME:
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case DARWIN_KERN_MAXPARTITIONS:
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return kern_sysctl(name, 1, oldp, oldlenp, newp, newlen, p);
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break;
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_vm_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_vfs_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_net_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_debug_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_hw_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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case DARWIN_HW_NCPU:
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name[0] = HW_NCPU;
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return hw_sysctl(name, 1, oldp, oldlenp, newp, newlen, p);
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break;
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case DARWIN_HW_VECTORUNIT:
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return sysctl_rdint(oldp, oldlenp, newp, 0);
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break;
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_machdep_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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static int
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darwin_user_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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switch (name[0]) {
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default:
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return EOPNOTSUPP;
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}
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/* NOTREACHED */
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return 0;
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}
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int
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darwin_sysctl(name, nlen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int nlen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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if (nlen != 1)
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return EOPNOTSUPP;
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switch (name[0]) {
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case EMUL_DARWIN_INIT_PID:
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return sysctl_int(oldp, oldlenp,
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newp, newlen, &darwin_init_pid);
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default:
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return EOPNOTSUPP;
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}
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return 0;
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}
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/*
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* On Darwin, mach_init is the system bootstrap process. It is responsible
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* for forking the traditional UNIX init(8) and it does the Mach port naming
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* service. We need mach_init for the naming service, but unfortunately, it
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* will only act as such if its PID is 1. We use a sysctl
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* (emul.darwin.init_pid) to fool a given process into thinking its PID is 1.
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* That way we can run mach_init when we want to.
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* Typical use:
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* sysctl -w emul.darwin.init_pid=$$; exec /emul/darwin/sbin/mach_init
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*
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* The same problem exists after mach_init has forked init: the fork libc stub
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* really insist on the child to have PID 2 (if PID is not 2, then the stub
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* will issue bootstrap calls to an already running mach_init, which fails,
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* of course).
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*/
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int
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darwin_sys_getpid(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct darwin_emuldata *ded;
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ded = (struct darwin_emuldata *)p->p_emuldata;
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if (ded->ded_fakepid != 0)
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*retval = ded->ded_fakepid;
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else
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*retval = p->p_pid;
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return 0;
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}
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