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b9906694f7
freebsd-skq/sys/kern/kern_sysctl.c
phk b9906694f7 Fix a minor buglet.
1995-11-10 16:22:41 +00:00

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/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Karels at Berkeley Software Design, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
* $Id: kern_sysctl.c,v 1.34 1995/11/10 09:58:53 phk Exp $
*/
/*
* sysctl system call.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/unistd.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <vm/vm.h>
#include <sys/sysctl.h>
#include <sys/user.h>
extern struct linker_set sysctl_;
/* BEGIN_MIB */
SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0,
"Sysctl internal magic");
SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0,
"High kernel, proc, limits &c");
SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0,
"Virtual memory");
SYSCTL_NODE(, CTL_FS, fs, CTLFLAG_RW, 0,
"File system");
SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0,
"Network, (see socket.h)");
SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0,
"Debugging");
SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0,
"hardware");
SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
"machine dependent");
SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0,
"user-level");
SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, osrelease, 0, "");
SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 0, BSD, "");
SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, version, 0, "");
SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, ostype, 0, "");
extern int osreldate;
SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, &osreldate, 0, "");
SYSCTL_INT(_kern, KERN_MAXVNODES, maxvnodes, CTLFLAG_RD, &desiredvnodes, 0, "");
SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, &maxproc, 0, "");
SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid,
CTLFLAG_RD, &maxprocperuid, 0, "");
SYSCTL_INT(_kern, KERN_MAXFILESPERPROC, maxfilesperproc,
CTLFLAG_RD, &maxfilesperproc, 0, "");
SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 0, ARG_MAX, "");
SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 0, _POSIX_VERSION, "");
SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 0, NGROUPS_MAX, "");
SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 0, 1, "");
SYSCTL_INT(_kern, KERN_MAXFILES, maxfiles, CTLFLAG_RW, &maxfiles, 0, "");
#ifdef _POSIX_SAVED_IDS
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 0, 1, "");
#else
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 0, 0, "");
#endif
char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile,
CTLFLAG_RW, kernelname, sizeof kernelname, "");
SYSCTL_STRUCT(_kern, KERN_BOOTTIME, boottime,
CTLFLAG_RW, &boottime, timeval, "");
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, cpu_model, 0, "");
SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 0, 1, "");
SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 0, BYTE_ORDER, "");
SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 0, PAGE_SIZE, "");
/* END_MIB */
extern int vfs_update_wakeup;
extern int vfs_update_interval;
static int
sysctl_kern_updateinterval SYSCTL_HANDLER_ARGS
{
int error = sysctl_handle_int(oidp,
oidp->oid_arg1, oidp->oid_arg2,
oldp, oldlenp, newp, newlen);
if (!error)
wakeup(&vfs_update_wakeup);
return error;
}
SYSCTL_PROC(_kern, KERN_UPDATEINTERVAL, update, CTLTYPE_INT|CTLFLAG_RW,
&vfs_update_interval, 0, sysctl_kern_updateinterval, "");
char hostname[MAXHOSTNAMELEN];
int hostnamelen;
static int
sysctl_kern_hostname SYSCTL_HANDLER_ARGS
{
int error = sysctl_handle_string(oidp,
oidp->oid_arg1, oidp->oid_arg2,
oldp, oldlenp, newp, newlen);
if (newp && (error == 0 || error == ENOMEM))
hostnamelen = newlen;
return error;
}
SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, CTLTYPE_STRING|CTLFLAG_RW,
&hostname, sizeof(hostname), sysctl_kern_hostname, "");
static int
sysctl_order_cmp(void *a, void *b)
{
struct sysctl_oid **pa,**pb;
pa = (struct sysctl_oid**) a;
pb = (struct sysctl_oid**) b;
if (!*pa) return 1;
if (!*pb) return -1;
return ((*pa)->oid_number - (*pb)->oid_number);
}
static void
sysctl_order(void *arg)
{
int j;
struct linker_set *l = (struct linker_set *) arg;
struct sysctl_oid **oidpp;
j = l->ls_length;
oidpp = (struct sysctl_oid **) l->ls_items;
for (; j--; oidpp++) {
if (!*oidpp)
continue;
if ((*oidpp)->oid_arg1 == arg) {
*oidpp = 0;
continue;
}
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE)
if (!(*oidpp)->oid_handler)
sysctl_order((*oidpp)->oid_arg1);
}
qsort(l->ls_items, l->ls_length, sizeof l->ls_items[0],
sysctl_order_cmp);
}
SYSINIT(sysctl,SI_SUB_KMEM,SI_ORDER_ANY,sysctl_order,&sysctl_);
static void
sysctl_sysctl_debug_dump_node(struct linker_set *l,int i)
{
int j,k;
struct sysctl_oid **oidpp;
j = l->ls_length;
oidpp = (struct sysctl_oid **) l->ls_items;
for (; j--; oidpp++) {
if (!*oidpp)
continue;
for (k=0; k<i; k++)
printf(" ");
if ((*oidpp)->oid_number > 100) {
printf("Junk! %p # %d %s k %x a1 %p a2 %x h %p\n",
*oidpp,
(*oidpp)->oid_number, (*oidpp)->oid_name,
(*oidpp)->oid_kind, (*oidpp)->oid_arg1,
(*oidpp)->oid_arg2, (*oidpp)->oid_handler);
continue;
}
printf("%d %s ", (*oidpp)->oid_number, (*oidpp)->oid_name);
printf("%c%c",
(*oidpp)->oid_kind & CTLFLAG_RD ? 'R':' ',
(*oidpp)->oid_kind & CTLFLAG_WR ? 'W':' ');
switch ((*oidpp)->oid_kind & CTLTYPE) {
case CTLTYPE_NODE:
if ((*oidpp)->oid_handler) {
printf(" Node(proc)\n");
} else {
printf(" Node\n");
sysctl_sysctl_debug_dump_node(
(*oidpp)->oid_arg1,i+2);
}
break;
case CTLTYPE_INT: printf(" Int\n"); break;
case CTLTYPE_STRING: printf(" String\n"); break;
case CTLTYPE_QUAD: printf(" Quad\n"); break;
case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break;
default: printf("\n");
}
}
}
static int
sysctl_sysctl_debug SYSCTL_HANDLER_ARGS
{
sysctl_sysctl_debug_dump_node(&sysctl_,0);
return ENOENT;
}
SYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD,
0, 0, sysctl_sysctl_debug, "");
char domainname[MAXHOSTNAMELEN];
int domainnamelen;
static int
sysctl_kern_domainname SYSCTL_HANDLER_ARGS
{
int error = sysctl_handle_string(oidp,
oidp->oid_arg1, oidp->oid_arg2,
oldp, oldlenp, newp, newlen);
if (newp && (error == 0 || error == ENOMEM))
domainnamelen = newlen;
return error;
}
SYSCTL_PROC(_kern, KERN_DOMAINNAME, domainname, CTLTYPE_STRING|CTLFLAG_RW,
&domainname, sizeof(domainname), sysctl_kern_domainname, "");
long hostid;
/* Some trouble here, if sizeof (int) != sizeof (long) */
SYSCTL_INT(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "");
int
sysctl_handle_int SYSCTL_HANDLER_ARGS
{
/* If there isn't sufficient space to return */
if (oldp && *oldlenp < sizeof(int))
return (ENOMEM);
/* If it is a constant, don't write */
if (newp && !arg1)
return (EPERM);
/* If we get more than an int */
if (newp && newlen != sizeof(int))
return (EINVAL);
*oldlenp = sizeof(int);
if (oldp && arg1 )
bcopy(arg1, oldp, sizeof(int));
else if (oldp)
bcopy(&arg2, oldp, sizeof(int));
if (newp)
bcopy(newp, arg1, sizeof(int));
return (0);
}
int
sysctl_handle_string SYSCTL_HANDLER_ARGS
{
int len, error=0;
char *str = (char *)arg1;
len = strlen(str) + 1;
if (oldp && *oldlenp < len) {
len = *oldlenp;
error=ENOMEM;
}
if (newp && newlen >= arg2)
return (EINVAL);
if (oldp) {
*oldlenp = len;
bcopy(str, oldp, len);
}
if (newp) {
bcopy(newp, str, newlen);
str[newlen] = 0;
}
return (error);
}
int
sysctl_handle_opaque SYSCTL_HANDLER_ARGS
{
if (oldp && *oldlenp < arg2)
return (ENOMEM);
if (newp && newlen != arg2)
return (EINVAL);
if (oldp) {
*oldlenp = arg2;
bcopy(arg1, oldp, arg2);
}
if (newp)
bcopy(newp, arg1, arg2);
return (0);
}
#ifdef DEBUG
static sysctlfn debug_sysctl;
#endif
/*
* Locking and stats
*/
static struct sysctl_lock {
int sl_lock;
int sl_want;
int sl_locked;
} memlock;
/*
* Traverse our tree, and find the right node, execute whatever it points
* at, and return the resulting error code.
* We work entirely in kernel-space at this time.
*/
int
sysctl_root SYSCTL_HANDLER_ARGS
{
int *name = (int *) arg1;
int namelen = arg2;
int indx, i, j;
struct sysctl_oid **oidpp;
struct linker_set *lsp = &sysctl_;
j = lsp->ls_length;
oidpp = (struct sysctl_oid **) lsp->ls_items;
indx = 0;
while (j-- && indx < CTL_MAXNAME) {
if (*oidpp && ((*oidpp)->oid_number == name[indx])) {
indx++;
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) {
if ((*oidpp)->oid_handler)
goto found;
if (indx == namelen)
return ENOENT;
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
j = lsp->ls_length;
oidpp = (struct sysctl_oid **)lsp->ls_items;
} else {
if (indx != namelen)
return EISDIR;
goto found;
}
} else {
oidpp++;
}
}
return EJUSTRETURN;
found:
/* If writing isn't allowed */
if (newp && !((*oidpp)->oid_kind & CTLFLAG_WR))
return (EPERM);
if (!(*oidpp)->oid_handler)
return EINVAL;
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) {
i = ((*oidpp)->oid_handler) (*oidpp,
name + indx, namelen - indx,
oldp, oldlenp, newp, newlen);
} else {
i = ((*oidpp)->oid_handler) (*oidpp,
(*oidpp)->oid_arg1, (*oidpp)->oid_arg2,
oldp, oldlenp, newp, newlen);
}
return (i);
}
struct sysctl_args {
int *name;
u_int namelen;
void *old;
size_t *oldlenp;
void *new;
size_t newlen;
};
int
__sysctl(p, uap, retval)
struct proc *p;
register struct sysctl_args *uap;
int *retval;
{
int error, name[CTL_MAXNAME];
if (uap->namelen > CTL_MAXNAME || uap->namelen < 2)
return (EINVAL);
error = copyin(uap->name, &name, uap->namelen * sizeof(int));
if (error)
return (error);
return (userland_sysctl(p, name, uap->namelen,
uap->old, uap->oldlenp, 0,
uap->new, uap->newlen, retval));
}
static sysctlfn kern_sysctl;
/*
* This is used from various compatibility syscalls too. That's why name
* must be in kernel space.
*/
int
userland_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, int inkernel, void *new, size_t newlen, int *retval)
{
int error = 0, dolock = 1, i;
u_int savelen = 0, oldlen = 0;
sysctlfn *fn;
void *oldp = 0;
void *newp = 0;
if (new != NULL && (error = suser(p->p_ucred, &p->p_acflag)))
return (error);
if (oldlenp) {
if (inkernel) {
oldlen = *oldlenp;
} else {
error = copyin(oldlenp, &oldlen, sizeof(oldlen));
if (error)
return (error);
}
}
if (old)
oldp = malloc(oldlen, M_TEMP, M_WAITOK);
if (newlen) {
newp = malloc(newlen, M_TEMP, M_WAITOK);
error = copyin(new, newp, newlen);
}
if (error) {
if (oldp)
free(oldp, M_TEMP);
if (newp)
free(newp, M_TEMP);
return error;
}
error = sysctl_root(0, name, namelen, oldp, &oldlen, newp, newlen);
if (!error || error == ENOMEM) {
if (retval)
*retval = oldlen;
if (oldlenp) {
if (inkernel) {
*oldlenp = oldlen;
} else {
i = copyout(&oldlen, oldlenp, sizeof(oldlen));
if (i)
error = i;
}
}
if ((error == ENOMEM || !error ) && oldp) {
i = copyout(oldp, old, oldlen);
if (i)
error = i;
free(oldp, M_TEMP);
}
if (newp)
free(newp, M_TEMP);
return (error);
}
if (oldp)
free(oldp, M_TEMP);
if (newp)
free(newp, M_TEMP);
switch (name[0]) {
case CTL_KERN:
fn = kern_sysctl;
if (name[1] != KERN_VNODE) /* XXX */
dolock = 0;
break;
case CTL_HW:
fn = hw_sysctl;
break;
case CTL_VM:
fn = vm_sysctl;
break;
case CTL_NET:
fn = net_sysctl;
break;
case CTL_FS:
fn = fs_sysctl;
break;
#ifdef DEBUG
case CTL_DEBUG:
fn = debug_sysctl;
break;
#endif
default:
return (EOPNOTSUPP);
}
if (old != NULL) {
if (!useracc(old, oldlen, B_WRITE))
return (EFAULT);
while (memlock.sl_lock) {
memlock.sl_want = 1;
(void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0);
memlock.sl_locked++;
}
memlock.sl_lock = 1;
if (dolock)
vslock(old, oldlen);
savelen = oldlen;
}
error = (*fn)(name + 1, namelen - 1, old, &oldlen,
new, newlen, p);
if (old != NULL) {
if (dolock)
vsunlock(old, savelen, B_WRITE);
memlock.sl_lock = 0;
if (memlock.sl_want) {
memlock.sl_want = 0;
wakeup((caddr_t)&memlock);
}
}
#if 0
if (error) {
printf("SYSCTL_ERROR: ");
for(i=0;i<namelen;i++)
printf("%d ", name[i]);
printf("= %d\n", error);
}
#endif
if (error)
return (error);
if (retval)
*retval = oldlen;
if (oldlenp) {
if (inkernel) {
*oldlenp = oldlen;
} else {
error = copyout(&oldlen, oldlenp, sizeof(oldlen));
}
}
return (error);
}
/*
* Attributes stored in the kernel.
*/
int securelevel = -1;
/*
* kernel related system variables.
*/
int
kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
int error, level;
dev_t ndumpdev;
/* all sysctl names at this level are terminal */
if (namelen != 1 && !(name[0] == KERN_PROC || name[0] == KERN_PROF
|| name[0] == KERN_NTP_PLL))
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case KERN_SECURELVL:
level = securelevel;
if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) ||
newp == NULL)
return (error);
if (level < securelevel && p->p_pid != 1)
return (EPERM);
securelevel = level;
return (0);
case KERN_VNODE:
return (sysctl_vnode(oldp, oldlenp));
case KERN_PROC:
return (sysctl_doproc(name + 1, namelen - 1, oldp, oldlenp));
case KERN_FILE:
return (sysctl_file(oldp, oldlenp));
#ifdef GPROF
case KERN_PROF:
return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp,
newp, newlen));
#endif
case KERN_NTP_PLL:
return (ntp_sysctl(name + 1, namelen - 1, oldp, oldlenp,
newp, newlen, p));
case KERN_DUMPDEV:
ndumpdev = dumpdev;
error = sysctl_struct(oldp, oldlenp, newp, newlen, &ndumpdev,
sizeof ndumpdev);
if (!error && ndumpdev != dumpdev) {
error = setdumpdev(ndumpdev);
}
return error;
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
/*
* hardware related system variables.
*/
int
hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
/* almost all sysctl names at this level are terminal */
if (namelen != 1 && name[0] != HW_DEVCONF)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case HW_PHYSMEM:
return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem)));
case HW_USERMEM:
return (sysctl_rdint(oldp, oldlenp, newp,
ctob(physmem - cnt.v_wire_count)));
case HW_DEVCONF:
return (dev_sysctl(name + 1, namelen - 1, oldp, oldlenp,
newp, newlen, p));
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
#ifdef DEBUG
/*
* Debugging related system variables.
*/
struct ctldebug debug0, debug1, debug2, debug3, debug4;
struct ctldebug debug5, debug6, debug7, debug8, debug9;
struct ctldebug debug10, debug11, debug12, debug13, debug14;
struct ctldebug debug15, debug16, debug17, debug18, debug19;
static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = {
&debug0, &debug1, &debug2, &debug3, &debug4,
&debug5, &debug6, &debug7, &debug8, &debug9,
&debug10, &debug11, &debug12, &debug13, &debug14,
&debug15, &debug16, &debug17, &debug18, &debug19,
};
static int
debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
struct ctldebug *cdp;
/* all sysctl names at this level are name and field */
if (namelen != 2)
return (ENOTDIR); /* overloaded */
cdp = debugvars[name[0]];
if (cdp->debugname == 0)
return (EOPNOTSUPP);
switch (name[1]) {
case CTL_DEBUG_NAME:
return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname));
case CTL_DEBUG_VALUE:
return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar));
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
#endif /* DEBUG */
/*
* Validate parameters and get old / set new parameters
* for an integer-valued sysctl function.
*/
int
sysctl_int(oldp, oldlenp, newp, newlen, valp)
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
int *valp;
{
int error = 0;
if (oldp && *oldlenp < sizeof(int))
return (ENOMEM);
if (newp && newlen != sizeof(int))
return (EINVAL);
*oldlenp = sizeof(int);
if (oldp)
error = copyout(valp, oldp, sizeof(int));
if (error == 0 && newp)
error = copyin(newp, valp, sizeof(int));
return (error);
}
/*
* As above, but read-only.
*/
int
sysctl_rdint(oldp, oldlenp, newp, val)
void *oldp;
size_t *oldlenp;
void *newp;
int val;
{
int error = 0;
if (oldp && *oldlenp < sizeof(int))
return (ENOMEM);
if (newp)
return (EPERM);
*oldlenp = sizeof(int);
if (oldp)
error = copyout((caddr_t)&val, oldp, sizeof(int));
return (error);
}
/*
* Validate parameters and get old / set new parameters
* for a string-valued sysctl function.
*/
int
sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen)
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
char *str;
int maxlen;
{
int len, error = 0, rval = 0;
len = strlen(str) + 1;
if (oldp && *oldlenp < len) {
len = *oldlenp;
rval = ENOMEM;
}
if (newp && newlen >= maxlen)
return (EINVAL);
if (oldp) {
*oldlenp = len;
error = copyout(str, oldp, len);
if (error)
rval = error;
}
if ((error == 0 || error == ENOMEM) && newp) {
error = copyin(newp, str, newlen);
if (error)
rval = error;
str[newlen] = 0;
}
return (rval);
}
/*
* As above, but read-only.
*/
int
sysctl_rdstring(oldp, oldlenp, newp, str)
void *oldp;
size_t *oldlenp;
void *newp;
char *str;
{
int len, error = 0, rval = 0;
len = strlen(str) + 1;
if (oldp && *oldlenp < len) {
len = *oldlenp;
rval = ENOMEM;
}
if (newp)
return (EPERM);
*oldlenp = len;
if (oldp)
error = copyout(str, oldp, len);
if (error)
rval = error;
return (rval);
}
/*
* Validate parameters and get old / set new parameters
* for a structure oriented sysctl function.
*/
int
sysctl_struct(oldp, oldlenp, newp, newlen, sp, len)
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
void *sp;
int len;
{
int error = 0;
if (oldp && *oldlenp < len)
return (ENOMEM);
if (newp && newlen > len)
return (EINVAL);
if (oldp) {
*oldlenp = len;
error = copyout(sp, oldp, len);
}
if (error == 0 && newp)
error = copyin(newp, sp, len);
return (error);
}
/*
* Validate parameters and get old parameters
* for a structure oriented sysctl function.
*/
int
sysctl_rdstruct(oldp, oldlenp, newp, sp, len)
void *oldp;
size_t *oldlenp;
void *newp, *sp;
int len;
{
int error = 0;
if (oldp && *oldlenp < len)
return (ENOMEM);
if (newp)
return (EPERM);
*oldlenp = len;
if (oldp)
error = copyout(sp, oldp, len);
return (error);
}
/*
* Get file structures.
*/
int
sysctl_file(where, sizep)
char *where;
size_t *sizep;
{
int buflen, error;
struct file *fp;
char *start = where;
buflen = *sizep;
if (where == NULL) {
/*
* overestimate by 10 files
*/
*sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file);
return (0);
}
/*
* first copyout filehead
*/
if (buflen < sizeof(filehead)) {
*sizep = 0;
return (0);
}
error = copyout((caddr_t)&filehead, where, sizeof(filehead));
if (error)
return (error);
buflen -= sizeof(filehead);
where += sizeof(filehead);
/*
* followed by an array of file structures
*/
for (fp = filehead; fp != NULL; fp = fp->f_filef) {
if (buflen < sizeof(struct file)) {
*sizep = where - start;
return (ENOMEM);
}
error = copyout((caddr_t)fp, where, sizeof (struct file));
if (error)
return (error);
buflen -= sizeof(struct file);
where += sizeof(struct file);
}
*sizep = where - start;
return (0);
}
/*
* try over estimating by 5 procs
*/
#define KERN_PROCSLOP (5 * sizeof (struct kinfo_proc))
int
sysctl_doproc(name, namelen, where, sizep)
int *name;
u_int namelen;
char *where;
size_t *sizep;
{
register struct proc *p;
register struct kinfo_proc *dp = (struct kinfo_proc *)where;
register int needed = 0;
int buflen = where != NULL ? *sizep : 0;
int doingzomb;
struct eproc eproc;
int error = 0;
if (namelen != 2 && !(namelen == 1 && name[0] == KERN_PROC_ALL))
return (EINVAL);
p = (struct proc *)allproc;
doingzomb = 0;
again:
for (; p != NULL; p = p->p_next) {
/*
* Skip embryonic processes.
*/
if (p->p_stat == SIDL)
continue;
/*
* TODO - make more efficient (see notes below).
* do by session.
*/
switch (name[0]) {
case KERN_PROC_PID:
/* could do this with just a lookup */
if (p->p_pid != (pid_t)name[1])
continue;
break;
case KERN_PROC_PGRP:
/* could do this by traversing pgrp */
if (p->p_pgrp == NULL || p->p_pgrp->pg_id != (pid_t)name[1])
continue;
break;
case KERN_PROC_TTY:
if ((p->p_flag & P_CONTROLT) == 0 ||
p->p_session == NULL ||
p->p_session->s_ttyp == NULL ||
p->p_session->s_ttyp->t_dev != (dev_t)name[1])
continue;
break;
case KERN_PROC_UID:
if (p->p_ucred == NULL || p->p_ucred->cr_uid != (uid_t)name[1])
continue;
break;
case KERN_PROC_RUID:
if (p->p_ucred == NULL || p->p_cred->p_ruid != (uid_t)name[1])
continue;
break;
}
if (buflen >= sizeof(struct kinfo_proc)) {
fill_eproc(p, &eproc);
error = copyout((caddr_t)p, &dp->kp_proc,
sizeof(struct proc));
if (error)
return (error);
error = copyout((caddr_t)&eproc, &dp->kp_eproc,
sizeof(eproc));
if (error)
return (error);
dp++;
buflen -= sizeof(struct kinfo_proc);
}
needed += sizeof(struct kinfo_proc);
}
if (doingzomb == 0) {
p = zombproc;
doingzomb++;
goto again;
}
if (where != NULL) {
*sizep = (caddr_t)dp - where;
if (needed > *sizep)
return (ENOMEM);
} else {
needed += KERN_PROCSLOP;
*sizep = needed;
}
return (0);
}
/*
* Fill in an eproc structure for the specified process.
*/
void
fill_eproc(p, ep)
register struct proc *p;
register struct eproc *ep;
{
register struct tty *tp;
bzero(ep, sizeof(*ep));
ep->e_paddr = p;
if (p->p_cred) {
ep->e_pcred = *p->p_cred;
if (p->p_ucred)
ep->e_ucred = *p->p_ucred;
}
if (p->p_stat != SIDL && p->p_stat != SZOMB && p->p_vmspace != NULL) {
register struct vmspace *vm = p->p_vmspace;
#ifdef pmap_resident_count
ep->e_vm.vm_rssize = pmap_resident_count(&vm->vm_pmap); /*XXX*/
#else
ep->e_vm.vm_rssize = vm->vm_rssize;
#endif
ep->e_vm.vm_tsize = vm->vm_tsize;
ep->e_vm.vm_dsize = vm->vm_dsize;
ep->e_vm.vm_ssize = vm->vm_ssize;
#ifndef sparc
ep->e_vm.vm_pmap = vm->vm_pmap;
#endif
}
if (p->p_pptr)
ep->e_ppid = p->p_pptr->p_pid;
if (p->p_pgrp) {
ep->e_sess = p->p_pgrp->pg_session;
ep->e_pgid = p->p_pgrp->pg_id;
ep->e_jobc = p->p_pgrp->pg_jobc;
}
if ((p->p_flag & P_CONTROLT) &&
(ep->e_sess != NULL) &&
((tp = ep->e_sess->s_ttyp) != NULL)) {
ep->e_tdev = tp->t_dev;
ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
ep->e_tsess = tp->t_session;
} else
ep->e_tdev = NODEV;
if (ep->e_sess && ep->e_sess->s_ttyvp)
ep->e_flag = EPROC_CTTY;
if (SESS_LEADER(p))
ep->e_flag |= EPROC_SLEADER;
if (p->p_wmesg) {
strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
ep->e_wmesg[WMESGLEN] = 0;
}
}
#ifdef COMPAT_43
#include <sys/socket.h>
#define KINFO_PROC (0<<8)
#define KINFO_RT (1<<8)
#define KINFO_VNODE (2<<8)
#define KINFO_FILE (3<<8)
#define KINFO_METER (4<<8)
#define KINFO_LOADAVG (5<<8)
#define KINFO_CLOCKRATE (6<<8)
/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
#define KINFO_BSDI_SYSINFO (101<<8)
/*
* XXX this is bloat, but I hope it's better here than on the potentially
* limited kernel stack... -Peter
*/
struct {
int bsdi_machine; /* "i386" on BSD/386 */
/* ^^^ this is an offset to the string, relative to the struct start */
char *pad0;
long pad1;
long pad2;
long pad3;
u_long pad4;
u_long pad5;
u_long pad6;
int bsdi_ostype; /* "BSD/386" on BSD/386 */
int bsdi_osrelease; /* "1.1" on BSD/386 */
long pad7;
long pad8;
char *pad9;
long pad10;
long pad11;
int pad12;
long pad13;
quad_t pad14;
long pad15;
struct timeval pad16;
/* we dont set this, because BSDI's uname used gethostname() instead */
int bsdi_hostname; /* hostname on BSD/386 */
/* the actual string data is appended here */
} bsdi_si;
/*
* this data is appended to the end of the bsdi_si structure during copyout.
* The "char *" offsets are relative to the base of the bsdi_si struct.
* This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
* should not exceed the length of the buffer here... (or else!! :-)
*/
char bsdi_strings[80]; /* It had better be less than this! */
struct getkerninfo_args {
int op;
char *where;
int *size;
int arg;
};
int
ogetkerninfo(p, uap, retval)
struct proc *p;
register struct getkerninfo_args *uap;
int *retval;
{
int error, name[6];
u_int size;
switch (uap->op & 0xff00) {
case KINFO_RT:
name[0] = CTL_NET;
name[1] = PF_ROUTE;
name[2] = 0;
name[3] = (uap->op & 0xff0000) >> 16;
name[4] = uap->op & 0xff;
name[5] = uap->arg;
error = userland_sysctl(p, name, 6, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_VNODE:
name[0] = CTL_KERN;
name[1] = KERN_VNODE;
error = userland_sysctl(p, name, 2, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_PROC:
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = uap->op & 0xff;
name[3] = uap->arg;
error = userland_sysctl(p, name, 4, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_FILE:
name[0] = CTL_KERN;
name[1] = KERN_FILE;
error = userland_sysctl(p, name, 2, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_METER:
name[0] = CTL_VM;
name[1] = VM_METER;
error = userland_sysctl(p, name, 2, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_LOADAVG:
name[0] = CTL_VM;
name[1] = VM_LOADAVG;
error = userland_sysctl(p, name, 2, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_CLOCKRATE:
name[0] = CTL_KERN;
name[1] = KERN_CLOCKRATE;
error = userland_sysctl(p, name, 2, uap->where, uap->size,
0, 0, 0, 0);
break;
case KINFO_BSDI_SYSINFO: {
/*
* this is pretty crude, but it's just enough for uname()
* from BSDI's 1.x libc to work.
*
* In particular, it doesn't return the same results when
* the supplied buffer is too small. BSDI's version apparently
* will return the amount copied, and set the *size to how
* much was needed. The emulation framework here isn't capable
* of that, so we just set both to the amount copied.
* BSDI's 2.x product apparently fails with ENOMEM in this
* scenario.
*/
u_int needed;
u_int left;
char *s;
bzero((char *)&bsdi_si, sizeof(bsdi_si));
bzero(bsdi_strings, sizeof(bsdi_strings));
s = bsdi_strings;
bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
strcpy(s, ostype);
s += strlen(s) + 1;
bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
strcpy(s, osrelease);
s += strlen(s) + 1;
bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
strcpy(s, machine);
s += strlen(s) + 1;
needed = sizeof(bsdi_si) + (s - bsdi_strings);
if (uap->where == NULL) {
/* process is asking how much buffer to supply.. */
size = needed;
error = 0;
break;
}
/* if too much buffer supplied, trim it down */
if (size > needed)
size = needed;
/* how much of the buffer is remaining */
left = size;
if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
break;
/* is there any point in continuing? */
if (left > sizeof(bsdi_si)) {
left -= sizeof(bsdi_si);
error = copyout(&bsdi_strings,
uap->where + sizeof(bsdi_si), left);
}
break;
}
default:
return (EOPNOTSUPP);
}
if (error)
return (error);
*retval = size;
if (uap->size)
error = copyout((caddr_t)&size, (caddr_t)uap->size,
sizeof(size));
return (error);
}
#endif /* COMPAT_43 */
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