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 * 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 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifdef lint 37 static const char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95"; 38 #endif 39 40 /* 41 * swapinfo - based on a program of the same name by Kevin Lahey 42 */ 43 44 #include <sys/param.h> 45 #include <sys/ioctl.h> 46 #include <sys/stat.h> 47 48 #include <kvm.h> 49 #include <nlist.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include <string.h> 54 #include <err.h> 55 56 #include "systat.h" 57 #include "extern.h" 58 59 kvm_t *kd; 60 61 static char *header; 62 static long blocksize; 63 static int dlen, odlen; 64 static int hlen; 65 static int ulen, oulen; 66 static int pagesize; 67 68 WINDOW * 69 openswap(void) 70 { 71 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 72 } 73 74 void 75 closeswap(WINDOW *w) 76 { 77 if (w == NULL) 78 return; 79 wclear(w); 80 wrefresh(w); 81 delwin(w); 82 } 83 84 /* 85 * The meat of all the swap stuff is stolen from pstat(8)'s 86 * swapmode(), which is based on a program called swapinfo written by 87 * Kevin Lahey <kml@rokkaku.atl.ga.us>. 88 */ 89 90 #define NSWAP 16 91 92 static struct kvm_swap kvmsw[NSWAP]; 93 static int kvnsw, okvnsw; 94 95 static void calclens(void); 96 97 #define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize)) 98 99 static void 100 calclens(void) 101 { 102 int i, n; 103 int len; 104 105 dlen = sizeof("Disk"); 106 for (i = 0; i < kvnsw; ++i) { 107 len = strlen(kvmsw[i].ksw_devname); 108 if (dlen < len) 109 dlen = len; 110 } 111 112 ulen = sizeof("Used"); 113 for (n = CONVERT(kvmsw[kvnsw].ksw_used), len = 2; n /= 10; ++len); 114 if (ulen < len) 115 ulen = len; 116 } 117 118 int 119 initswap(void) 120 { 121 static int once = 0; 122 123 if (once) 124 return (1); 125 126 header = getbsize(&hlen, &blocksize); 127 pagesize = getpagesize(); 128 129 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 130 error("systat: kvm_getswapinfo failed"); 131 return (0); 132 } 133 okvnsw = kvnsw; 134 135 calclens(); 136 odlen = dlen; 137 oulen = ulen; 138 139 once = 1; 140 return (1); 141 } 142 143 void 144 fetchswap(void) 145 { 146 147 okvnsw = kvnsw; 148 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 149 error("systat: kvm_getswapinfo failed"); 150 return; 151 } 152 153 odlen = dlen; 154 oulen = ulen; 155 calclens(); 156 } 157 158 void 159 labelswap(void) 160 { 161 const char *name; 162 int i; 163 164 fetchswap(); 165 166 werase(wnd); 167 168 mvwprintw(wnd, 0, 0, "%*s%*s%*s %s", 169 -dlen, "Disk", hlen, header, ulen, "Used", 170 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 171 172 for (i = 0; i <= kvnsw; ++i) { 173 if (i == kvnsw) { 174 if (kvnsw == 1) 175 break; 176 name = "Total"; 177 } else 178 name = kvmsw[i].ksw_devname; 179 mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name); 180 } 181 } 182 183 void 184 showswap(void) 185 { 186 int count; 187 int i; 188 189 if (kvnsw != okvnsw || dlen != odlen || ulen != oulen) 190 labelswap(); 191 192 for (i = 0; i <= kvnsw; ++i) { 193 if (i == kvnsw) { 194 if (kvnsw == 1) 195 break; 196 } 197 198 if (kvmsw[i].ksw_total == 0) { 199 mvwprintw( 200 wnd, 201 i + 1, 202 dlen + hlen + ulen + 1, 203 "(swap not configured)" 204 ); 205 continue; 206 } 207 208 wmove(wnd, i + 1, dlen); 209 210 wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total)); 211 wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used)); 212 213 count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1; 214 215 waddch(wnd, ' '); 216 while (count--) 217 waddch(wnd, 'X'); 218 wclrtoeol(wnd); 219 } 220 } 221