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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31
32 __FBSDID("$FreeBSD$");
33
34 #ifdef lint
35 static const char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95";
36 #endif
37
38 /*
39 * swapinfo - based on a program of the same name by Kevin Lahey
40 */
41
42 #include <sys/param.h>
43 #include <sys/ioctl.h>
44 #include <sys/stat.h>
45
46 #include <kvm.h>
47 #include <nlist.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <unistd.h>
51 #include <string.h>
52 #include <err.h>
53
54 #include "systat.h"
55 #include "extern.h"
56
57 kvm_t *kd;
58
59 static char *header;
60 static long blocksize;
61 static int dlen, odlen;
62 static int hlen;
63 static int ulen, oulen;
64 static int pagesize;
65
66 WINDOW *
openswap(void)67 openswap(void)
68 {
69 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
70 }
71
72 void
closeswap(WINDOW * w)73 closeswap(WINDOW *w)
74 {
75 if (w == NULL)
76 return;
77 wclear(w);
78 wrefresh(w);
79 delwin(w);
80 }
81
82 /*
83 * The meat of all the swap stuff is stolen from pstat(8)'s
84 * swapmode(), which is based on a program called swapinfo written by
85 * Kevin Lahey <kml@rokkaku.atl.ga.us>.
86 */
87
88 #define NSWAP 16
89
90 static struct kvm_swap kvmsw[NSWAP];
91 static int kvnsw, okvnsw;
92
93 static void calclens(void);
94
95 #define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize))
96
97 static void
calclens(void)98 calclens(void)
99 {
100 int i, n;
101 int len;
102
103 dlen = sizeof("Disk");
104 for (i = 0; i < kvnsw; ++i) {
105 len = strlen(kvmsw[i].ksw_devname);
106 if (dlen < len)
107 dlen = len;
108 }
109
110 ulen = sizeof("Used");
111 for (n = CONVERT(kvmsw[kvnsw].ksw_used), len = 2; n /= 10; ++len);
112 if (ulen < len)
113 ulen = len;
114 }
115
116 int
initswap(void)117 initswap(void)
118 {
119 static int once = 0;
120
121 if (once)
122 return (1);
123
124 header = getbsize(&hlen, &blocksize);
125 pagesize = getpagesize();
126
127 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
128 error("systat: kvm_getswapinfo failed");
129 return (0);
130 }
131 okvnsw = kvnsw;
132
133 calclens();
134 odlen = dlen;
135 oulen = ulen;
136
137 once = 1;
138 return (1);
139 }
140
141 void
fetchswap(void)142 fetchswap(void)
143 {
144
145 okvnsw = kvnsw;
146 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
147 error("systat: kvm_getswapinfo failed");
148 return;
149 }
150
151 odlen = dlen;
152 oulen = ulen;
153 calclens();
154 }
155
156 void
labelswap(void)157 labelswap(void)
158 {
159 const char *name;
160 int i;
161
162 fetchswap();
163
164 werase(wnd);
165
166 mvwprintw(wnd, 0, 0, "%*s%*s%*s %s",
167 -dlen, "Disk", hlen, header, ulen, "Used",
168 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
169
170 for (i = 0; i <= kvnsw; ++i) {
171 if (i == kvnsw) {
172 if (kvnsw == 1)
173 break;
174 name = "Total";
175 } else
176 name = kvmsw[i].ksw_devname;
177 mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name);
178 }
179 }
180
181 void
showswap(void)182 showswap(void)
183 {
184 int count;
185 int i;
186
187 if (kvnsw != okvnsw || dlen != odlen || ulen != oulen)
188 labelswap();
189
190 for (i = 0; i <= kvnsw; ++i) {
191 if (i == kvnsw) {
192 if (kvnsw == 1)
193 break;
194 }
195
196 if (kvmsw[i].ksw_total == 0) {
197 mvwprintw(
198 wnd,
199 i + 1,
200 dlen + hlen + ulen + 1,
201 "(swap not configured)"
202 );
203 continue;
204 }
205
206 wmove(wnd, i + 1, dlen);
207
208 wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total));
209 wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used));
210
211 count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1;
212
213 waddch(wnd, ' ');
214 while (count--)
215 waddch(wnd, 'X');
216 wclrtoeol(wnd);
217 }
218 }
219