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 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 #include <sys/cdefs.h> 34 35 __FBSDID("$FreeBSD$"); 36 37 #ifdef lint 38 static const char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95"; 39 #endif 40 41 /* 42 * swapinfo - based on a program of the same name by Kevin Lahey 43 */ 44 45 #include <sys/param.h> 46 #include <sys/ioctl.h> 47 #include <sys/stat.h> 48 49 #include <kvm.h> 50 #include <nlist.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <unistd.h> 54 #include <string.h> 55 #include <err.h> 56 57 #include "systat.h" 58 #include "extern.h" 59 #include "devs.h" 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; 140 141 dsinit(12); 142 143 return (1); 144 } 145 146 void 147 fetchswap(void) 148 { 149 okvnsw = kvnsw; 150 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 151 error("systat: kvm_getswapinfo failed"); 152 return; 153 } 154 155 odlen = dlen; 156 oulen = ulen; 157 calclens(); 158 159 struct devinfo *tmp_dinfo; 160 161 tmp_dinfo = last_dev.dinfo; 162 last_dev.dinfo = cur_dev.dinfo; 163 cur_dev.dinfo = tmp_dinfo; 164 165 last_dev.snap_time = cur_dev.snap_time; 166 dsgetinfo( &cur_dev ); 167 } 168 169 void 170 labelswap(void) 171 { 172 const char *name; 173 int i; 174 175 fetchswap(); 176 177 werase(wnd); 178 179 mvwprintw(wnd, 0, 0, "%*s%*s%*s %s", 180 -dlen, "Disk", hlen, header, ulen, "Used", 181 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 182 183 for (i = 0; i <= kvnsw; ++i) { 184 if (i == kvnsw) { 185 if (kvnsw == 1) 186 break; 187 name = "Total"; 188 } else 189 name = kvmsw[i].ksw_devname; 190 mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name); 191 } 192 dslabel(12, 0, 18); 193 } 194 195 void 196 showswap(void) 197 { 198 int count; 199 int i; 200 201 if (kvnsw != okvnsw || dlen != odlen || ulen != oulen) 202 labelswap(); 203 204 for (i = 0; i <= kvnsw; ++i) { 205 if (i == kvnsw) { 206 if (kvnsw == 1) 207 break; 208 } 209 210 if (kvmsw[i].ksw_total == 0) { 211 mvwprintw( 212 wnd, 213 i + 1, 214 dlen + hlen + ulen + 1, 215 "(swap not configured)" 216 ); 217 continue; 218 } 219 220 wmove(wnd, i + 1, dlen); 221 222 wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total)); 223 wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used)); 224 225 count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1; 226 227 waddch(wnd, ' '); 228 while (count--) 229 waddch(wnd, 'X'); 230 wclrtoeol(wnd); 231 } 232 dsshow(12, 0, 18, &cur_dev, &last_dev); 233 } 234