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