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
55 static int pathlen;
56
57 WINDOW *
openswap(void)58 openswap(void)
59 {
60
61 return (subwin(stdscr, LINES - 3 - 1, 0, MAINWIN_ROW, 0));
62 }
63
64 void
closeswap(WINDOW * w)65 closeswap(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
83 static struct kvm_swap kvmsw[NSWAP];
84 static int kvnsw, okvnsw;
85
86 int
initswap(void)87 initswap(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
106 void
fetchswap(void)107 fetchswap(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
127 void
labelswap(void)128 labelswap(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
145 void
showswap(void)146 showswap(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