swap.c revision 77206 
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 77206 2001-05-25 23:15:05Z kris $";
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/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
61extern char *getbsize __P((int *headerlenp, long *blocksizep));
62void showspace __P((char *header, int hlen, long blocksize));
63
64kvm_t	*kd;
65
66static long blocksize;
67static int hlen;
68
69WINDOW *
70openswap()
71{
72	return (subwin(stdscr, LINES-5-1, 0, 5, 0));
73}
74
75void
76closeswap(w)
77	WINDOW *w;
78{
79	if (w == NULL)
80		return;
81	wclear(w);
82	wrefresh(w);
83	delwin(w);
84}
85
86/*
87 * The meat of all the swap stuff is stolen from pstat(8)'s
88 * swapmode(), which is based on a program called swapinfo written by
89 * Kevin Lahey <kml@rokkaku.atl.ga.us>.
90 */
91
92int
93initswap()
94{
95	char msgbuf[BUFSIZ];
96	static int once = 0;
97	struct kvm_swap dummy;
98
99	if (once)
100		return (1);
101
102	if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
103		snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
104		error("%s", msgbuf);
105		return (0);
106	}
107
108	once = 1;
109	return (1);
110}
111
112static struct kvm_swap	kvmsw[16];
113static int kvnsw;
114
115void
116fetchswap()
117{
118	kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
119}
120
121void
122labelswap()
123{
124	char *header;
125	int row, i;
126
127	fetchswap();
128
129	row = 0;
130	wmove(wnd, row, 0); wclrtobot(wnd);
131	header = getbsize(&hlen, &blocksize);
132	mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
133	    "Disk", hlen, header, "Used",
134	    "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
135
136	for (i = 0; i < kvnsw; ++i) {
137		mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
138	}
139}
140
141void
142showswap()
143{
144	int i;
145	int pagesize = getpagesize();
146
147#define CONVERT(v)      ((int)((quad_t)(v) * pagesize / blocksize))
148
149	for (i = 0; i <= kvnsw; ++i) {
150		int col = 5;
151		int count;
152
153		if (i == kvnsw) {
154			if (kvnsw == 1)
155				break;
156			mvwprintw(
157			    wnd,
158			    i + 1,
159			    col,
160			    "%-5s",
161			    "Total"
162			);
163			col += 5;
164		}
165		if (kvmsw[i].ksw_total == 0) {
166			mvwprintw(
167			    wnd,
168			    i + 1,
169			    col + 5,
170			    "(swap not configured)"
171			);
172			continue;
173		}
174
175		mvwprintw(
176		    wnd,
177		    i + 1,
178		    col,
179		    "%*d",
180		    hlen,
181		    CONVERT(kvmsw[i].ksw_total)
182		);
183		col += hlen;
184
185		mvwprintw(
186		    wnd,
187		    i + 1,
188		    col,
189		    "%9d  ",
190		    CONVERT(kvmsw[i].ksw_used)
191		);
192
193		count = (int)((double)kvmsw[i].ksw_used * 49.999 /
194		    (double)kvmsw[i].ksw_total);
195
196		while (count >= 0) {
197			waddch(wnd, 'X');
198			--count;
199		}
200	}
201}
202