swap.c revision 60049 
1/*-
2 * Copyright (c) 1980, 1992, 1993
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
35#if 0
36static char sccsid[] = "@(#)swap.c	8.3 (Berkeley) 4/29/95";
37#endif
38static const char rcsid[] =
39  "$FreeBSD: head/usr.bin/systat/swap.c 60049 2000-05-05 15:41:22Z phk $";
40#endif /* not lint */
41
42/*
43 * swapinfo - based on a program of the same name by Kevin Lahey
44 */
45
46#include <sys/param.h>
47#include <sys/conf.h>
48#include <sys/ioctl.h>
49#include <sys/stat.h>
50
51#include <kvm.h>
52#include <nlist.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <unistd.h>
56#include <string.h>
57#include <err.h>
58
59#include "systat.h"
60#include "extern.h"
61
62extern char *getbsize __P((int *headerlenp, long *blocksizep));
63void showspace __P((char *header, int hlen, long blocksize));
64
65kvm_t	*kd;
66
67static long blocksize;
68static int hlen;
69
70WINDOW *
71openswap()
72{
73	return (subwin(stdscr, LINES-5-1, 0, 5, 0));
74}
75
76void
77closeswap(w)
78	WINDOW *w;
79{
80	if (w == NULL)
81		return;
82	wclear(w);
83	wrefresh(w);
84	delwin(w);
85}
86
87/*
88 * The meat of all the swap stuff is stolen from pstat(8)'s
89 * swapmode(), which is based on a program called swapinfo written by
90 * Kevin Lahey <kml@rokkaku.atl.ga.us>.
91 */
92
93int
94initswap()
95{
96	int i;
97	char msgbuf[BUFSIZ];
98	char *cp;
99	static int once = 0;
100	u_long ptr;
101	struct kvm_swap dummy;
102
103	if (once)
104		return (1);
105
106	if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
107		snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
108		error(msgbuf);
109		return (0);
110	}
111
112	once = 1;
113	return (1);
114}
115
116static struct kvm_swap	kvmsw[16];
117static int kvnsw;
118
119void
120fetchswap()
121{
122	kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
123}
124
125void
126labelswap()
127{
128	char *header, *p;
129	int row, i;
130
131	fetchswap();
132
133	row = 0;
134	wmove(wnd, row, 0); wclrtobot(wnd);
135	header = getbsize(&hlen, &blocksize);
136	mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
137	    "Disk", hlen, header, "Used",
138	    "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
139
140	for (i = 0; i < kvnsw; ++i) {
141		mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
142	}
143}
144
145void
146showswap()
147{
148	int i;
149	int pagesize = getpagesize();
150
151#define CONVERT(v)      ((int)((quad_t)(v) * pagesize / blocksize))
152
153	for (i = 0; i <= kvnsw; ++i) {
154		int col = 5;
155		int count;
156
157		if (i == kvnsw) {
158			if (kvnsw == 1)
159				break;
160			mvwprintw(
161			    wnd,
162			    i + 1,
163			    col,
164			    "%-5s",
165			    "Total"
166			);
167			col += 5;
168		}
169		if (kvmsw[i].ksw_total == 0) {
170			mvwprintw(
171			    wnd,
172			    i + 1,
173			    col + 5,
174			    "(swap not configured)"
175			);
176			continue;
177		}
178
179		mvwprintw(
180		    wnd,
181		    i + 1,
182		    col,
183		    "%*d",
184		    hlen,
185		    CONVERT(kvmsw[i].ksw_total)
186		);
187		col += hlen;
188
189		mvwprintw(
190		    wnd,
191		    i + 1,
192		    col,
193		    "%9d  ",
194		    CONVERT(kvmsw[i].ksw_used)
195		);
196
197		count = (int)((double)kvmsw[i].ksw_used * 49.999 /
198		    (double)kvmsw[i].ksw_total);
199
200		while (count >= 0) {
201			waddch(wnd, 'X');
202			--count;
203		}
204	}
205}
206