1/*	$NetBSD: swap.c,v 1.21 2021/11/09 09:18:02 nia Exp $	*/
2
3/*
4 * Copyright (c) 1997 Matthew R. Green.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29/*-
30 * Copyright (c) 1980, 1992, 1993
31 *	The Regents of the University of California.  All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 *    notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 *    notice, this list of conditions and the following disclaimer in the
40 *    documentation and/or other materials provided with the distribution.
41 * 3. Neither the name of the University nor the names of its contributors
42 *    may be used to endorse or promote products derived from this software
43 *    without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57
58#include <sys/cdefs.h>
59#ifndef lint
60#if 0
61static char sccsid[] = "@(#)swap.c	8.3 (Berkeley) 4/29/95";
62#endif
63__RCSID("$NetBSD: swap.c,v 1.21 2021/11/09 09:18:02 nia Exp $");
64#endif /* not lint */
65
66#include <sys/param.h>
67#include <sys/swap.h>
68
69#include <errno.h>
70#include <stdio.h>
71#include <stdlib.h>
72#include <string.h>
73#include <unistd.h>
74
75#include "systat.h"
76#include "extern.h"
77
78void showspace(char *header, int hlen, long blocksize);
79
80static	long blocksize;
81static	int hlen, nswap, rnswap;
82static	int first = 1;
83static	struct swapent *swap_devices;
84
85WINDOW *
86openswap(void)
87{
88
89	return (subwin(stdscr, -1, 0, 5, 0));
90}
91
92void
93closeswap(WINDOW *w)
94{
95
96	if (w == NULL)
97		return;
98	wclear(w);
99	wrefresh(w);
100	delwin(w);
101}
102
103/* do nothing */
104int
105initswap(void)
106{
107
108	return (1);
109}
110
111void
112fetchswap(void)
113{
114	int	update_label = 0;
115
116	first = 0;
117	nswap = swapctl(SWAP_NSWAP, 0, 0);
118	if (nswap < 0)
119		error("error: %s", strerror(errno));
120	if (nswap == 0)
121		return;
122	update_label = (nswap != rnswap);
123
124	if (reallocarr(&swap_devices, nswap, sizeof(*swap_devices)) != 0) {
125		error("realloc failed");
126		die(0);
127	}
128
129	if ((rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap)) != nswap) {
130		error("swapctl failed");
131		die(0);
132	}
133
134	if (update_label)
135		labelswap();
136}
137
138void
139labelswap(void)
140{
141	char	*header;
142	int	row;
143
144	row = 0;
145	wmove(wnd, row, 0);
146	wclrtobot(wnd);
147	if (first)
148		fetchswap();
149	if (nswap == 0) {
150		mvwprintw(wnd, row++, 0, "No swap");
151		return;
152	}
153	header = getbsize(&hlen, &blocksize);
154	mvwprintw(wnd, row++, 0, "%-5s%*s%9s  %55s",
155	    "Disk", hlen, header, "Used",
156	    "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100%");
157}
158
159void
160showswap(void)
161{
162	int	col, blk_div, i, avail, used, xsize, swp_free;
163	struct	swapent *sep;
164	char	*p;
165
166	blk_div = blocksize / 512;
167	swp_free = avail = 0;
168	for (sep = swap_devices, i = 0; i < nswap; i++, sep++) {
169		p = strrchr(sep->se_path, '/');
170		p = p ? p+1 : sep->se_path;
171
172		mvwprintw(wnd, i + 1, 0, "%-5s", p);
173
174		col = 5;
175		mvwprintw(wnd, i + 1, col, "%*d", hlen, sep->se_nblks / blk_div);
176
177		col += hlen;
178		xsize = sep->se_nblks;
179		used = sep->se_inuse;
180		avail += xsize;
181		swp_free += xsize - used;
182		mvwprintw(wnd, i + 1, col, "%9d  ", used / blk_div);
183		wclrtoeol(wnd);
184		whline(wnd, 'X', (100 * used / xsize + 1) / 2);
185	}
186	/* do total if necessary */
187	if (nswap > 1) {
188		used = avail - swp_free;
189		mvwprintw(wnd, i + 1, 0, "%-5s%*d%9d  ",
190		    "Total", hlen, avail / blk_div, used / blk_div);
191		wclrtoeol(wnd);
192		whline(wnd, 'X', (100 * used / avail + 1) / 2);
193	}
194}
195