swap.c revision 165488 
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#include <sys/cdefs.h>
35
36__FBSDID("$FreeBSD: head/usr.bin/systat/swap.c 165488 2006-12-23 14:25:17Z yar $");
37
38#ifdef lint
39static const char sccsid[] = "@(#)swap.c	8.3 (Berkeley) 4/29/95";
40#endif
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/ioctl.h>
48#include <sys/stat.h>
49
50#include <kvm.h>
51#include <nlist.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <unistd.h>
55#include <string.h>
56#include <err.h>
57
58#include "systat.h"
59#include "extern.h"
60
61kvm_t	*kd;
62
63static long blocksize;
64static int hlen;
65
66WINDOW *
67openswap()
68{
69	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
70}
71
72void
73closeswap(w)
74	WINDOW *w;
75{
76	if (w == NULL)
77		return;
78	wclear(w);
79	wrefresh(w);
80	delwin(w);
81}
82
83/*
84 * The meat of all the swap stuff is stolen from pstat(8)'s
85 * swapmode(), which is based on a program called swapinfo written by
86 * Kevin Lahey <kml@rokkaku.atl.ga.us>.
87 */
88
89int
90initswap()
91{
92	char msgbuf[BUFSIZ];
93	static int once = 0;
94	struct kvm_swap dummy;
95
96	if (once)
97		return (1);
98
99	if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
100		snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
101		error("%s", msgbuf);
102		return (0);
103	}
104
105	once = 1;
106	return (1);
107}
108
109static struct kvm_swap	kvmsw[16];
110static int kvnsw;
111
112void
113fetchswap()
114{
115	kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
116}
117
118void
119labelswap()
120{
121	char *header;
122	int row, i;
123
124	fetchswap();
125
126	row = 0;
127	wmove(wnd, row, 0); wclrtobot(wnd);
128	header = getbsize(&hlen, &blocksize);
129	mvwprintw(wnd, row++, 0, "%-5s%*s%9s %s",
130	    "Disk", hlen, header, "Used",
131	    "/0%  /10  /20  /30  /40  /50  /60  /70  /80  /90  /100");
132
133	for (i = 0; i < kvnsw; ++i) {
134		mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
135	}
136}
137
138void
139showswap()
140{
141	int i;
142	int pagesize = getpagesize();
143
144#define CONVERT(v)      ((int)((quad_t)(v) * pagesize / blocksize))
145
146	for (i = 0; i <= kvnsw; ++i) {
147		int lcol = 5;
148		int count;
149
150		if (i == kvnsw) {
151			if (kvnsw == 1)
152				break;
153			mvwprintw(
154			    wnd,
155			    i + 1,
156			    lcol,
157			    "%-5s",
158			    "Total"
159			);
160			lcol += 5;
161		}
162		if (kvmsw[i].ksw_total == 0) {
163			mvwprintw(
164			    wnd,
165			    i + 1,
166			    lcol + 5,
167			    "(swap not configured)"
168			);
169			continue;
170		}
171
172		mvwprintw(
173		    wnd,
174		    i + 1,
175		    lcol,
176		    "%*d",
177		    hlen,
178		    CONVERT(kvmsw[i].ksw_total)
179		);
180		lcol += hlen;
181
182		mvwprintw(
183		    wnd,
184		    i + 1,
185		    lcol,
186		    "%9d ",
187		    CONVERT(kvmsw[i].ksw_used)
188		);
189
190		count = (int)((double)kvmsw[i].ksw_used * 49.999 /
191		    (double)kvmsw[i].ksw_total);
192
193		while (count >= 0) {
194			waddch(wnd, 'X');
195			--count;
196		}
197	}
198}
199