NetBSD/sys/kern/kern_sysctl.c

1107 lines
26 KiB
C

/* $NetBSD: kern_sysctl.c,v 1.61 2000/04/15 04:38:07 simonb Exp $ */
/*-
* 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 8.9 (Berkeley) 5/20/95
*/
/*
* sysctl system call.
*/
#include "opt_ddb.h"
#include "opt_insecure.h"
#include "opt_defcorename.h"
#include "opt_sysv.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/pool.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/disklabel.h>
#include <sys/device.h>
#include <vm/vm.h>
#include <sys/sysctl.h>
#include <sys/msgbuf.h>
#include <uvm/uvm_extern.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#if defined(DDB)
#include <ddb/ddbvar.h>
#endif
/*
* Locking and stats
*/
static struct sysctl_lock {
int sl_lock;
int sl_want;
int sl_locked;
} memlock;
int
sys___sysctl(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct sys___sysctl_args /* {
syscallarg(int *) name;
syscallarg(u_int) namelen;
syscallarg(void *) old;
syscallarg(size_t *) oldlenp;
syscallarg(void *) new;
syscallarg(size_t) newlen;
} */ *uap = v;
int error, dolock = 1;
size_t savelen = 0, oldlen = 0;
sysctlfn *fn;
int name[CTL_MAXNAME];
size_t *oldlenp;
/*
* all top-level sysctl names are non-terminal
*/
if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2)
return (EINVAL);
error = copyin(SCARG(uap, name), &name,
SCARG(uap, namelen) * sizeof(int));
if (error)
return (error);
/*
* For all but CTL_PROC, must be root to change a value.
* For CTL_PROC, must be root, or owner of the proc (and not suid),
* this is checked in proc_sysctl() (once we know the targer proc).
*/
if (SCARG(uap, new) != NULL && name[0] != CTL_PROC &&
(error = suser(p->p_ucred, &p->p_acflag)))
return error;
switch (name[0]) {
case CTL_KERN:
fn = kern_sysctl;
if (name[2] != KERN_VNODE) /* XXX */
dolock = 0;
break;
case CTL_HW:
fn = hw_sysctl;
break;
case CTL_VM:
fn = uvm_sysctl;
break;
case CTL_NET:
fn = net_sysctl;
break;
case CTL_VFS:
fn = vfs_sysctl;
break;
case CTL_MACHDEP:
fn = cpu_sysctl;
break;
#ifdef DEBUG
case CTL_DEBUG:
fn = debug_sysctl;
break;
#endif
#ifdef DDB
case CTL_DDB:
fn = ddb_sysctl;
break;
#endif
case CTL_PROC:
fn = proc_sysctl;
break;
default:
return (EOPNOTSUPP);
}
oldlenp = SCARG(uap, oldlenp);
if (oldlenp) {
if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen))))
return (error);
oldlenp = &oldlen;
}
if (SCARG(uap, old) != NULL) {
if (!uvm_useracc(SCARG(uap, old), oldlen, B_WRITE))
return (EFAULT);
while (memlock.sl_lock) {
memlock.sl_want = 1;
sleep((caddr_t)&memlock, PRIBIO+1);
memlock.sl_locked++;
}
memlock.sl_lock = 1;
if (dolock) {
/*
* XXX Um, this is kind of evil. What should we
* XXX be passing here?
*/
if (uvm_vslock(p, SCARG(uap, old), oldlen,
VM_PROT_NONE) != KERN_SUCCESS) {
memlock.sl_lock = 0;
if (memlock.sl_want) {
memlock.sl_want = 0;
wakeup((caddr_t)&memlock);
return (EFAULT);
}
}
}
savelen = oldlen;
}
error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old),
oldlenp, SCARG(uap, new), SCARG(uap, newlen), p);
if (SCARG(uap, old) != NULL) {
if (dolock)
uvm_vsunlock(p, SCARG(uap, old), savelen);
memlock.sl_lock = 0;
if (memlock.sl_want) {
memlock.sl_want = 0;
wakeup((caddr_t)&memlock);
}
}
if (error)
return (error);
if (SCARG(uap, oldlenp))
error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen));
return (error);
}
/*
* Attributes stored in the kernel.
*/
char hostname[MAXHOSTNAMELEN];
int hostnamelen;
char domainname[MAXHOSTNAMELEN];
int domainnamelen;
long hostid;
#ifdef INSECURE
int securelevel = -1;
#else
int securelevel = 0;
#endif
#ifdef DEFCORENAME
char defcorename[MAXPATHLEN] = DEFCORENAME;
int defcorenamelen = sizeof(DEFCORENAME);
#else
char defcorename[MAXPATHLEN] = "%n.core";
int defcorenamelen = sizeof("%n.core");
#endif
extern int kern_logsigexit;
/*
* 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, inthostid;
int old_autonicetime;
int old_vnodes;
/* All sysctl names at this level, except for a few, are terminal. */
switch (name[0]) {
case KERN_PROC:
case KERN_PROF:
case KERN_MBUF:
/* Not terminal. */
break;
default:
if (namelen != 1)
return (ENOTDIR); /* overloaded */
}
switch (name[0]) {
case KERN_OSTYPE:
return (sysctl_rdstring(oldp, oldlenp, newp, ostype));
case KERN_OSRELEASE:
return (sysctl_rdstring(oldp, oldlenp, newp, osrelease));
case KERN_OSREV:
return (sysctl_rdint(oldp, oldlenp, newp, NetBSD));
case KERN_VERSION:
return (sysctl_rdstring(oldp, oldlenp, newp, version));
case KERN_MAXVNODES:
old_vnodes = desiredvnodes;
error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes);
if (old_vnodes > desiredvnodes) {
desiredvnodes = old_vnodes;
return (EINVAL);
}
return (error);
case KERN_MAXPROC:
return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc));
case KERN_MAXFILES:
return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles));
case KERN_ARGMAX:
return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX));
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_HOSTNAME:
error = sysctl_string(oldp, oldlenp, newp, newlen,
hostname, sizeof(hostname));
if (newp && !error)
hostnamelen = newlen;
return (error);
case KERN_DOMAINNAME:
error = sysctl_string(oldp, oldlenp, newp, newlen,
domainname, sizeof(domainname));
if (newp && !error)
domainnamelen = newlen;
return (error);
case KERN_HOSTID:
inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */
error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid);
hostid = inthostid;
return (error);
case KERN_CLOCKRATE:
return (sysctl_clockrate(oldp, oldlenp));
case KERN_BOOTTIME:
return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime,
sizeof(struct timeval)));
case KERN_VNODE:
return (sysctl_vnode(oldp, oldlenp, p));
case KERN_PROC:
return (sysctl_doeproc(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_POSIX1:
return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION));
case KERN_NGROUPS:
return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX));
case KERN_JOB_CONTROL:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_SAVED_IDS:
#ifdef _POSIX_SAVED_IDS
return (sysctl_rdint(oldp, oldlenp, newp, 1));
#else
return (sysctl_rdint(oldp, oldlenp, newp, 0));
#endif
case KERN_MAXPARTITIONS:
return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS));
case KERN_RAWPARTITION:
return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART));
#ifdef NTP
case KERN_NTPTIME:
return (sysctl_ntptime(oldp, oldlenp));
#endif
case KERN_AUTONICETIME:
old_autonicetime = autonicetime;
error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime);
if (autonicetime < 0)
autonicetime = old_autonicetime;
return (error);
case KERN_AUTONICEVAL:
error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval);
if (autoniceval < PRIO_MIN)
autoniceval = PRIO_MIN;
if (autoniceval > PRIO_MAX)
autoniceval = PRIO_MAX;
return (error);
case KERN_RTC_OFFSET:
return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset));
case KERN_ROOT_DEVICE:
return (sysctl_rdstring(oldp, oldlenp, newp,
root_device->dv_xname));
case KERN_MSGBUFSIZE:
/*
* deal with cases where the message buffer has
* become corrupted.
*/
if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
msgbufenabled = 0;
return (ENXIO);
}
return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs));
case KERN_FSYNC:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_SYSVMSG:
#ifdef SYSVMSG
return (sysctl_rdint(oldp, oldlenp, newp, 1));
#else
return (sysctl_rdint(oldp, oldlenp, newp, 0));
#endif
case KERN_SYSVSEM:
#ifdef SYSVSEM
return (sysctl_rdint(oldp, oldlenp, newp, 1));
#else
return (sysctl_rdint(oldp, oldlenp, newp, 0));
#endif
case KERN_SYSVSHM:
#ifdef SYSVSHM
return (sysctl_rdint(oldp, oldlenp, newp, 1));
#else
return (sysctl_rdint(oldp, oldlenp, newp, 0));
#endif
case KERN_DEFCORENAME:
if (newp && newlen < 1)
return (EINVAL);
error = sysctl_string(oldp, oldlenp, newp, newlen,
defcorename, sizeof(defcorename));
if (newp && !error)
defcorenamelen = newlen;
return (error);
case KERN_SYNCHRONIZED_IO:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_IOV_MAX:
return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX));
case KERN_MBUF:
return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp,
newp, newlen));
case KERN_MAPPED_FILES:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_MEMLOCK:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_MEMLOCK_RANGE:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_MEMORY_PROTECTION:
return (sysctl_rdint(oldp, oldlenp, newp, 1));
case KERN_LOGIN_NAME_MAX:
return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX));
case KERN_LOGSIGEXIT:
return (sysctl_int(oldp, oldlenp, newp, newlen, &kern_logsigexit));
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;
{
/* all sysctl names at this level are terminal */
if (namelen != 1)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case HW_MACHINE:
return (sysctl_rdstring(oldp, oldlenp, newp, machine));
case HW_MACHINE_ARCH:
return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch));
case HW_MODEL:
return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model));
case HW_NCPU:
return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */
case HW_BYTEORDER:
return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER));
case HW_PHYSMEM:
return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem)));
case HW_USERMEM:
return (sysctl_rdint(oldp, oldlenp, newp,
ctob(physmem - uvmexp.wired)));
case HW_PAGESIZE:
return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE));
case HW_ALIGNBYTES:
return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES));
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,
};
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 (name[0] >= CTL_DEBUG_MAXID || 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 */
int
proc_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 proc *ptmp=NULL;
const struct proclist_desc *pd;
int error = 0;
struct rlimit alim;
struct plimit *newplim;
char *tmps = NULL;
int i, curlen, len;
if (namelen < 2)
return EINVAL;
if (name[0] == PROC_CURPROC) {
ptmp = p;
} else {
proclist_lock_read();
for (pd = proclists; pd->pd_list != NULL; pd++) {
for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL;
ptmp = LIST_NEXT(ptmp, p_list)) {
/* Skip embryonic processes. */
if (ptmp->p_stat == SIDL)
continue;
if (ptmp->p_pid == (pid_t)name[0])
break;
}
if (ptmp != NULL)
break;
}
proclist_unlock_read();
if (ptmp == NULL)
return(ESRCH);
if (p->p_ucred->cr_uid != 0) {
if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid ||
p->p_cred->p_ruid != ptmp->p_cred->p_svuid)
return EPERM;
if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid)
return EPERM; /* sgid proc */
for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
if (p->p_ucred->cr_groups[i] ==
ptmp->p_cred->p_rgid)
break;
}
if (i == p->p_ucred->cr_ngroups)
return EPERM;
}
}
if (name[1] == PROC_PID_CORENAME) {
if (namelen != 2)
return EINVAL;
/*
* Can't use sysctl_string() here because we may malloc a new
* area during the process, so we have to do it by hand.
*/
curlen = strlen(ptmp->p_limit->pl_corename) + 1;
if (oldlenp && *oldlenp < curlen) {
if (!oldp)
*oldlenp = curlen;
return (ENOMEM);
}
if (newp) {
if (securelevel > 2)
return EPERM;
if (newlen > MAXPATHLEN)
return ENAMETOOLONG;
tmps = malloc(newlen + 1, M_TEMP, M_WAITOK);
if (tmps == NULL)
return ENOMEM;
error = copyin(newp, tmps, newlen + 1);
tmps[newlen] = '\0';
if (error)
goto cleanup;
/* Enforce to be either 'core' for end with '.core' */
if (newlen < 4) { /* c.o.r.e */
error = EINVAL;
goto cleanup;
}
len = newlen - 4;
if (len > 0) {
if (tmps[len - 1] != '.' &&
tmps[len - 1] != '/') {
error = EINVAL;
goto cleanup;
}
}
if (strcmp(&tmps[len], "core") != 0) {
error = EINVAL;
goto cleanup;
}
}
if (oldp && oldlenp) {
*oldlenp = curlen;
error = copyout(ptmp->p_limit->pl_corename, oldp,
curlen);
}
if (newp && error == 0) {
/* if the 2 strings are identical, don't limcopy() */
if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) {
error = 0;
goto cleanup;
}
if (ptmp->p_limit->p_refcnt > 1 &&
(ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) {
newplim = limcopy(ptmp->p_limit);
limfree(ptmp->p_limit);
ptmp->p_limit = newplim;
} else if (ptmp->p_limit->pl_corename != defcorename) {
free(ptmp->p_limit->pl_corename, M_TEMP);
}
ptmp->p_limit->pl_corename = tmps;
return (0);
}
cleanup:
if (tmps)
free(tmps, M_TEMP);
return (error);
}
if (name[1] == PROC_PID_LIMIT) {
if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID)
return EINVAL;
memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim));
if (name[3] == PROC_PID_LIMIT_TYPE_HARD)
error = sysctl_quad(oldp, oldlenp, newp, newlen,
&alim.rlim_max);
else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT)
error = sysctl_quad(oldp, oldlenp, newp, newlen,
&alim.rlim_cur);
else
error = EINVAL;
if (error)
return error;
if (newp)
error = dosetrlimit(ptmp, p->p_cred,
name[2] - 1, &alim);
return error;
}
return (EINVAL);
}
/*
* Convenience macros.
*/
#define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \
if (oldlenp) { \
if (!oldp) \
*oldlenp = len; \
else { \
if (*oldlenp < len) \
return(ENOMEM); \
*oldlenp = len; \
error = copyout((caddr_t)valp, oldp, len); \
} \
}
#define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \
SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ))
#define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \
if (newp && newlen != len) \
return (EINVAL);
#define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \
SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ))
#define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \
if (error == 0 && newp) \
error = copyin(newp, valp, len);
#define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \
SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ))
#define SYSCTL_STRING_CORE(oldp, oldlenp, str) \
if (oldlenp) { \
len = strlen(str) + 1; \
if (!oldp) \
*oldlenp = len; \
else { \
if (*oldlenp < len) { \
err2 = ENOMEM; \
len = *oldlenp; \
} else \
*oldlenp = len; \
error = copyout(str, oldp, len);\
if (error == 0) \
error = err2; \
} \
}
/*
* 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;
SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int)
SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int)
SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, 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 (newp)
return (EPERM);
SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int)
return (error);
}
/*
* Validate parameters and get old / set new parameters
* for an quad-valued sysctl function.
*/
int
sysctl_quad(oldp, oldlenp, newp, newlen, valp)
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
quad_t *valp;
{
int error = 0;
SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t)
SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t)
SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t)
return (error);
}
/*
* As above, but read-only.
*/
int
sysctl_rdquad(oldp, oldlenp, newp, val)
void *oldp;
size_t *oldlenp;
void *newp;
quad_t val;
{
int error = 0;
if (newp)
return (EPERM);
SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t)
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, err2 = 0;
if (newp && newlen >= maxlen)
return (EINVAL);
SYSCTL_STRING_CORE(oldp, oldlenp, str);
if (error == 0 && newp) {
error = copyin(newp, str, newlen);
str[newlen] = 0;
}
return (error);
}
/*
* 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, err2 = 0;
if (newp)
return (EPERM);
SYSCTL_STRING_CORE(oldp, oldlenp, str);
return (error);
}
/*
* 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;
SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len)
SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len)
SYSCTL_SCALAR_NEWPCOP_LEN(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 (newp)
return (EPERM);
SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, 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.lh_first; fp != 0; fp = fp->f_list.le_next) {
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_doeproc(name, namelen, where, sizep)
int *name;
u_int namelen;
char *where;
size_t *sizep;
{
struct proc *p;
struct kinfo_proc *dp = (struct kinfo_proc *)where;
int needed = 0;
int buflen = where != NULL ? *sizep : 0;
const struct proclist_desc *pd;
struct eproc eproc;
int error = 0;
if (namelen != 2 && !(namelen == 1 && name[0] == KERN_PROC_ALL))
return (EINVAL);
proclist_lock_read();
pd = proclists;
again:
for (p = LIST_FIRST(pd->pd_list); p != NULL;
p = LIST_NEXT(p, p_list)) {
/*
* 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->pg_id != (pid_t)name[1])
continue;
break;
case KERN_PROC_TTY:
if (name[1] == KERN_PROC_TTY_REVOKE) {
if ((p->p_flag & P_CONTROLT) == 0 ||
p->p_session->s_ttyp == NULL ||
p->p_session->s_ttyvp != NULL)
continue;
} else if ((p->p_flag & P_CONTROLT) == 0 ||
p->p_session->s_ttyp == NULL) {
if ((dev_t)name[1] != KERN_PROC_TTY_NODEV)
continue;
} else if (p->p_session->s_ttyp->t_dev !=
(dev_t)name[1])
continue;
break;
case KERN_PROC_UID:
if (p->p_ucred->cr_uid != (uid_t)name[1])
continue;
break;
case KERN_PROC_RUID:
if (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)
goto cleanup;
error = copyout((caddr_t)&eproc, &dp->kp_eproc,
sizeof(eproc));
if (error)
goto cleanup;
dp++;
buflen -= sizeof(struct kinfo_proc);
}
needed += sizeof(struct kinfo_proc);
}
pd++;
if (pd->pd_list != NULL)
goto again;
proclist_unlock_read();
if (where != NULL) {
*sizep = (caddr_t)dp - where;
if (needed > *sizep)
return (ENOMEM);
} else {
needed += KERN_PROCSLOP;
*sizep = needed;
}
return (0);
cleanup:
proclist_unlock_read();
return (error);
}
/*
* Fill in an eproc structure for the specified process.
*/
void
fill_eproc(p, ep)
struct proc *p;
struct eproc *ep;
{
struct tty *tp;
ep->e_paddr = p;
ep->e_sess = p->p_session;
ep->e_pcred = *p->p_cred;
ep->e_ucred = *p->p_ucred;
if (p->p_stat == SIDL || P_ZOMBIE(p)) {
ep->e_vm.vm_rssize = 0;
ep->e_vm.vm_tsize = 0;
ep->e_vm.vm_dsize = 0;
ep->e_vm.vm_ssize = 0;
/* ep->e_vm.vm_pmap = XXX; */
} else {
struct vmspace *vm = p->p_vmspace;
ep->e_vm.vm_rssize = vm_resident_count(vm);
ep->e_vm.vm_tsize = vm->vm_tsize;
ep->e_vm.vm_dsize = vm->vm_dsize;
ep->e_vm.vm_ssize = vm->vm_ssize;
}
if (p->p_pptr)
ep->e_ppid = p->p_pptr->p_pid;
else
ep->e_ppid = 0;
ep->e_pgid = p->p_pgrp->pg_id;
ep->e_sid = ep->e_sess->s_sid;
ep->e_jobc = p->p_pgrp->pg_jobc;
if ((p->p_flag & P_CONTROLT) &&
(tp = ep->e_sess->s_ttyp)) {
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 (p->p_wmesg)
strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
ep->e_xsize = ep->e_xrssize = 0;
ep->e_xccount = ep->e_xswrss = 0;
ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
if (SESS_LEADER(p))
ep->e_flag |= EPROC_SLEADER;
strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME);
}