1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 * Copyright (c) 2017, 2020 Yoshihiro Ota
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/cdefs.h>
34
35__FBSDID("$FreeBSD$");
36
37#ifdef lint
38static const char sccsid[] = "@(#)swap.c	8.3 (Berkeley) 4/29/95";
39#endif
40
41/*
42 * swapinfo - based on a program of the same name by Kevin Lahey
43 */
44
45#include <sys/param.h>
46#include <sys/ioctl.h>
47#include <sys/stat.h>
48
49#include <kvm.h>
50#include <nlist.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <unistd.h>
54#include <string.h>
55#include <err.h>
56
57#include "systat.h"
58#include "extern.h"
59#include "devs.h"
60
61static int pathlen;
62
63WINDOW *
64openswap(void)
65{
66
67	return (subwin(stdscr, LINES - 3 - 1, 0, MAINWIN_ROW, 0));
68}
69
70void
71closeswap(WINDOW *w)
72{
73
74	if (w == NULL)
75		return;
76	wclear(w);
77	wrefresh(w);
78	delwin(w);
79}
80
81/*
82 * The meat of all the swap stuff is stolen from pstat(8)'s
83 * swapmode(), which is based on a program called swapinfo written by
84 * Kevin Lahey <kml@rokkaku.atl.ga.us>.
85 */
86
87#define NSWAP	16
88
89static struct kvm_swap kvmsw[NSWAP];
90static int kvnsw, okvnsw;
91
92int
93initswap(void)
94{
95	static int once = 0;
96
97	if (once)
98		return (1);
99
100	if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
101		error("systat: kvm_getswapinfo failed");
102		return (0);
103	}
104	pathlen = 80 - 50 /* % */ - 5 /* Used */ - 5 /* Size */ - 3 /* space */;
105	dsinit(12);
106	once = 1;
107
108	return (1);
109}
110
111void
112fetchswap(void)
113{
114
115	okvnsw = kvnsw;
116	if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
117		error("systat: kvm_getswapinfo failed");
118		return;
119	}
120
121	struct devinfo *tmp_dinfo;
122
123	tmp_dinfo = last_dev.dinfo;
124	last_dev.dinfo = cur_dev.dinfo;
125	cur_dev.dinfo = tmp_dinfo;
126
127	last_dev.snap_time = cur_dev.snap_time;
128	dsgetinfo( &cur_dev );
129}
130
131void
132labelswap(void)
133{
134	const char *name;
135	int i;
136
137	werase(wnd);
138
139	dslabel(12, 0, 18);
140
141	if (kvnsw <= 0) {
142		mvwprintw(wnd, 0, 0, "(swap not configured)");
143		return;
144	}
145
146	mvwprintw(wnd, 0, 0, "%*s%5s %5s %s",
147	    -pathlen, "Device/Path", "Size", "Used",
148	    "|0%  /10  /20  /30  /40  / 60\\  70\\  80\\  90\\ 100|");
149
150	for (i = 0; i <= kvnsw; ++i) {
151		name = i == kvnsw ? "Total" : kvmsw[i].ksw_devname;
152		mvwprintw(wnd, 1 + i, 0, "%-*.*s", pathlen, pathlen - 1, name);
153	}
154}
155
156void
157showswap(void)
158{
159	int count;
160	int i;
161
162	if (kvnsw != okvnsw)
163		labelswap();
164
165	dsshow(12, 0, 18, &cur_dev, &last_dev);
166
167	if (kvnsw <= 0)
168		return;
169
170	for (i = 0; i <= kvnsw; ++i) {
171		sysputpage(wnd, i + 1, pathlen, 5, kvmsw[i].ksw_total, 0);
172		sysputpage(wnd, i + 1, pathlen + 5 + 1, 5, kvmsw[i].ksw_used,
173		    0);
174
175		if (kvmsw[i].ksw_used > 0) {
176			count = 50 * kvmsw[i].ksw_used / kvmsw[i].ksw_total;
177			sysputXs(wnd, i + 1, pathlen + 5 + 1 + 5 + 1, count);
178		}
179		wclrtoeol(wnd);
180	}
181}
182