nlist.c revision 1557 
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
34#ifndef lint
35static char sccsid[] = "@(#)nlist.c	8.4 (Berkeley) 4/2/94";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/time.h>
40#include <sys/proc.h>
41#include <sys/resource.h>
42
43#include <err.h>
44#include <errno.h>
45#include <kvm.h>
46#include <nlist.h>
47#include <stdio.h>
48#include <string.h>
49
50#include "ps.h"
51
52#ifdef P_PPWAIT
53#define NEWVM
54#endif
55
56struct	nlist psnl[] = {
57	{"_fscale"},
58#define	X_FSCALE	0
59	{"_ccpu"},
60#define	X_CCPU		1
61#ifdef NEWVM
62	{"_avail_start"},
63#define	X_AVAILSTART	2
64	{"_avail_end"},
65#define	X_AVAILEND	3
66#else
67	{"_ecmx"},
68#define	X_ECMX		2
69#endif
70	{NULL}
71};
72
73fixpt_t	ccpu;				/* kernel _ccpu variable */
74int	nlistread;			/* if nlist already read. */
75int	mempages;			/* number of pages of phys. memory */
76int	fscale;				/* kernel _fscale variable */
77
78extern kvm_t *kd;
79
80#define kread(x, v) \
81	kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
82
83int
84donlist()
85{
86	int rval;
87#ifdef NEWVM
88	int tmp;
89#endif
90
91	rval = 0;
92	nlistread = 1;
93	if (kvm_nlist(kd, psnl)) {
94		nlisterr(psnl);
95		eval = 1;
96		return (1);
97	}
98	if (kread(X_FSCALE, fscale)) {
99		warnx("fscale: %s", kvm_geterr(kd));
100		eval = rval = 1;
101	}
102#ifdef NEWVM
103	if (kread(X_AVAILEND, mempages)) {
104		warnx("avail_start: %s", kvm_geterr(kd));
105		eval = rval = 1;
106	}
107	if (kread(X_AVAILSTART, tmp)) {
108		warnx("avail_end: %s", kvm_geterr(kd));
109		eval = rval = 1;
110	}
111	mempages -= tmp;
112#else
113	if (kread(X_ECMX, mempages)) {
114		warnx("ecmx: %s", kvm_geterr(kd));
115		eval = rval = 1;
116	}
117#endif
118	if (kread(X_CCPU, ccpu)) {
119		warnx("ccpu: %s", kvm_geterr(kd));
120		eval = rval = 1;
121	}
122	return (rval);
123}
124
125void
126nlisterr(nl)
127	struct nlist nl[];
128{
129	int i;
130
131	(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
132	for (i = 0; nl[i].n_name != NULL; i++)
133		if (nl[i].n_value == 0)
134			(void)fprintf(stderr, " %s", nl[i].n_name);
135	(void)fprintf(stderr, "\n");
136}
137