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/* $OpenBSD: nlist.c,v 1.17 2009/10/27 23:59:22 deraadt Exp $ */
/* $NetBSD: nlist.c,v 1.11 1995/03/21 09:08:03 cgd Exp $ */
/*-
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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. 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.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <err.h>
#include <errno.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "ps.h"
struct nlist psnl[] = {
{"_fscale"},
#define X_FSCALE 0
{"_ccpu"},
#define X_CCPU 1
{"_physmem"},
#define X_PHYSMEM 2
{"_maxslp"},
#define X_MAXSLP 3
{NULL}
};
fixpt_t ccpu; /* kernel _ccpu variable */
int nlistread; /* if nlist already read. */
u_int mempages; /* number of pages of phys. memory */
int fscale; /* kernel _fscale variable */
int maxslp;
extern kvm_t *kd;
extern int kvm_sysctl_only;
#define kread(x, v) \
kvm_read(kd, psnl[x].n_value, &v, sizeof v) != sizeof(v)
int
donlist(void)
{
int64_t physmem;
int rval, mib[2];
size_t siz;
rval = 0;
nlistread = 1;
if (kd != NULL && !kvm_sysctl_only) {
if (kvm_nlist(kd, psnl)) {
nlisterr(psnl);
eval = 1;
return (1);
}
if (kread(X_FSCALE, fscale)) {
warnx("fscale: %s", kvm_geterr(kd));
eval = rval = 1;
}
if (kread(X_PHYSMEM, mempages)) {
warnx("physmem: %s", kvm_geterr(kd));
eval = rval = 1;
}
if (kread(X_CCPU, ccpu)) {
warnx("ccpu: %s", kvm_geterr(kd));
eval = rval = 1;
}
if (kread(X_MAXSLP, maxslp)) {
warnx("maxslp: %s", kvm_geterr(kd));
eval = rval = 1;
}
} else {
siz = sizeof (fscale);
mib[0] = CTL_KERN;
mib[1] = KERN_FSCALE;
if (sysctl(mib, 2, &fscale, &siz, NULL, 0) < 0) {
warnx("fscale: failed to get kern.fscale");
eval = rval = 1;
}
siz = sizeof (physmem);
mib[0] = CTL_HW;
mib[1] = HW_PHYSMEM64;
if (sysctl(mib, 2, &physmem, &siz, NULL, 0) < 0) {
warnx("physmem: failed to get hw.physmem");
eval = rval = 1;
}
/* translate bytes into page count */
mempages = physmem / getpagesize();
siz = sizeof (ccpu);
mib[0] = CTL_KERN;
mib[1] = KERN_CCPU;
if (sysctl(mib, 2, &ccpu, &siz, NULL, 0) < 0) {
warnx("ccpu: failed to get kern.ccpu");
eval = rval = 1;
}
siz = sizeof (maxslp);
mib[0] = CTL_VM;
mib[1] = VM_MAXSLP;
if (sysctl(mib, 2, &maxslp, &siz, NULL, 0) < 0) {
warnx("maxslp: failed to get vm.maxslp");
eval = rval = 1;
}
}
return (rval);
}
void
nlisterr(struct nlist nl[])
{
int i;
(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
for (i = 0; nl[i].n_name != NULL; i++)
if (nl[i].n_value == 0)
(void)fprintf(stderr, " %s", nl[i].n_name);
(void)fprintf(stderr, "\n");
}
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