GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/ps/nlist.c Lines: 24 53 45.3 %
Date: 2017-11-13 Branches: 5 24 20.8 %

Line Branch Exec Source
1
/*	$OpenBSD: nlist.c,v 1.20 2017/01/24 22:40:09 deraadt Exp $	*/
2
/*	$NetBSD: nlist.c,v 1.11 1995/03/21 09:08:03 cgd Exp $	*/
3
4
/*-
5
 * Copyright (c) 1990, 1993, 1994
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 * 1. Redistributions of source code must retain the above copyright
12
 *    notice, this list of conditions and the following disclaimer.
13
 * 2. Redistributions in binary form must reproduce the above copyright
14
 *    notice, this list of conditions and the following disclaimer in the
15
 *    documentation and/or other materials provided with the distribution.
16
 * 3. Neither the name of the University nor the names of its contributors
17
 *    may be used to endorse or promote products derived from this software
18
 *    without specific prior written permission.
19
 *
20
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30
 * SUCH DAMAGE.
31
 */
32
33
#include <sys/param.h>	/* MAXCOMLEN */
34
#include <sys/time.h>
35
#include <sys/signal.h>
36
#include <sys/resource.h>
37
#include <sys/sysctl.h>
38
39
#include <err.h>
40
#include <errno.h>
41
#include <kvm.h>
42
#include <nlist.h>
43
#include <stdio.h>
44
#include <string.h>
45
#include <unistd.h>
46
47
#include "ps.h"
48
49
struct	nlist psnl[] = {
50
	{"_fscale"},
51
#define	X_FSCALE	0
52
	{"_ccpu"},
53
#define	X_CCPU		1
54
	{"_physmem"},
55
#define	X_PHYSMEM	2
56
	{"_maxslp"},
57
#define X_MAXSLP	3
58
	{NULL}
59
};
60
61
fixpt_t	ccpu;				/* kernel _ccpu variable */
62
int	nlistread;			/* if nlist already read. */
63
u_int	mempages;			/* number of pages of phys. memory */
64
int	fscale;				/* kernel _fscale variable */
65
int	maxslp;
66
67
extern kvm_t *kd;
68
69
#define kread(x, v) \
70
	kvm_read(kd, psnl[x].n_value, &v, sizeof v) != sizeof(v)
71
72
int
73
donlist(void)
74
{
75
18
	int64_t physmem;
76
9
	int rval, mib[2];
77
9
	size_t siz;
78
79
	rval = 0;
80
9
	nlistread = 1;
81
82
9
	if (kd != NULL && !kvm_sysctl_only) {
83
		if (kvm_nlist(kd, psnl)) {
84
			nlisterr(psnl);
85
			eval = 1;
86
			return (1);
87
		}
88
		if (kread(X_FSCALE, fscale)) {
89
			warnx("fscale: %s", kvm_geterr(kd));
90
			eval = rval = 1;
91
		}
92
		if (kread(X_PHYSMEM, mempages)) {
93
			warnx("physmem: %s", kvm_geterr(kd));
94
			eval = rval = 1;
95
		}
96
		if (kread(X_CCPU, ccpu)) {
97
			warnx("ccpu: %s", kvm_geterr(kd));
98
			eval = rval = 1;
99
		}
100
		if (kread(X_MAXSLP, maxslp)) {
101
			warnx("maxslp: %s", kvm_geterr(kd));
102
			eval = rval = 1;
103
		}
104
	} else {
105
9
		siz = sizeof (fscale);
106
9
		mib[0] = CTL_KERN;
107
9
		mib[1] = KERN_FSCALE;
108
9
		if (sysctl(mib, 2, &fscale, &siz, NULL, 0) < 0) {
109
			warnx("fscale: failed to get kern.fscale");
110
			eval = rval = 1;
111
		}
112
9
		siz = sizeof (physmem);
113
9
		mib[0] = CTL_HW;
114
9
		mib[1] = HW_PHYSMEM64;
115
9
		if (sysctl(mib, 2, &physmem, &siz, NULL, 0) < 0) {
116
			warnx("physmem: failed to get hw.physmem");
117
			eval = rval = 1;
118
		}
119
		/* translate bytes into page count */
120
9
		mempages = physmem / getpagesize();
121
9
		siz = sizeof (ccpu);
122
9
		mib[0] = CTL_KERN;
123
9
		mib[1] = KERN_CCPU;
124
9
		if (sysctl(mib, 2, &ccpu, &siz, NULL, 0) < 0) {
125
			warnx("ccpu: failed to get kern.ccpu");
126
			eval = rval = 1;
127
		}
128
9
		siz = sizeof (maxslp);
129
9
		mib[0] = CTL_VM;
130
9
		mib[1] = VM_MAXSLP;
131
9
		if (sysctl(mib, 2, &maxslp, &siz, NULL, 0) < 0) {
132
			warnx("maxslp: failed to get vm.maxslp");
133
			eval = rval = 1;
134
		}
135
	}
136
9
	return (rval);
137
9
}
138
139
void
140
nlisterr(struct nlist nl[])
141
{
142
	int i;
143
144
	(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
145
	for (i = 0; nl[i].n_name != NULL; i++)
146
		if (nl[i].n_value == 0)
147
			(void)fprintf(stderr, " %s", nl[i].n_name);
148
	(void)fprintf(stderr, "\n");
149
}