nlist.c revision 4794 
1/*-
2 * Copyright (c) 1990, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	$Id: nlist.c,v 1.4 1994/10/02 08:33:29 davidg Exp $
34 */
35
36#ifndef lint
37static char sccsid[] = "@(#)nlist.c	8.4 (Berkeley) 4/2/94";
38#endif /* not lint */
39
40#include <sys/param.h>
41#include <sys/time.h>
42#include <sys/proc.h>
43#include <sys/resource.h>
44
45#include <err.h>
46#include <errno.h>
47#include <kvm.h>
48#include <nlist.h>
49#include <stdio.h>
50#include <string.h>
51
52#include "ps.h"
53
54#ifdef P_PPWAIT
55#define NEWVM
56#endif
57
58struct	nlist psnl[] = {
59	{"_fscale"},
60#define	X_FSCALE	0
61	{"_ccpu"},
62#define	X_CCPU		1
63#ifdef NEWVM
64	{"_avail_start"},
65#define	X_AVAILSTART	2
66	{"_avail_end"},
67#define	X_AVAILEND	3
68#else
69	{"_ecmx"},
70#define	X_ECMX		2
71#endif
72	{NULL}
73};
74
75fixpt_t	ccpu;				/* kernel _ccpu variable */
76int	nlistread;			/* if nlist already read. */
77int	mempages;			/* number of pages of phys. memory */
78int	fscale;				/* kernel _fscale variable */
79
80extern kvm_t *kd;
81
82#define kread(x, v) \
83	kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
84
85int
86donlist()
87{
88	int rval;
89#ifdef NEWVM
90	int tmp;
91#endif
92
93	rval = 0;
94	nlistread = 1;
95	if (kvm_nlist(kd, psnl)) {
96		nlisterr(psnl);
97		eval = 1;
98		return (1);
99	}
100	if (kread(X_FSCALE, fscale)) {
101		warnx("fscale: %s", kvm_geterr(kd));
102		eval = rval = 1;
103	}
104#ifdef NEWVM
105	if (kread(X_AVAILEND, mempages)) {
106		warnx("avail_start: %s", kvm_geterr(kd));
107		eval = rval = 1;
108	}
109	if (kread(X_AVAILSTART, tmp)) {
110		warnx("avail_end: %s", kvm_geterr(kd));
111		eval = rval = 1;
112	}
113	mempages -= tmp;
114	mempages /= PAGE_SIZE;
115#else
116	if (kread(X_ECMX, mempages)) {
117		warnx("ecmx: %s", kvm_geterr(kd));
118		eval = rval = 1;
119	}
120#endif
121	if (kread(X_CCPU, ccpu)) {
122		warnx("ccpu: %s", kvm_geterr(kd));
123		eval = rval = 1;
124	}
125	return (rval);
126}
127
128void
129nlisterr(nl)
130	struct nlist nl[];
131{
132	int i;
133
134	(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
135	for (i = 0; nl[i].n_name != NULL; i++)
136		if (nl[i].n_value == 0)
137			(void)fprintf(stderr, " %s", nl[i].n_name);
138	(void)fprintf(stderr, "\n");
139}
140