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 kvm_t *kd; 62 63 static char *header; 64 static long blocksize; 65 static int dlen, odlen; 66 static int hlen; 67 static int ulen, oulen; 68 static int pagesize; 69 70 WINDOW * 71 openswap(void) 72 { 73 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 74 } 75 76 void 77 closeswap(WINDOW *w) 78 { 79 if (w == NULL) 80 return; 81 wclear(w); 82 wrefresh(w); 83 delwin(w); 84 } 85 86 /* 87 * The meat of all the swap stuff is stolen from pstat(8)'s 88 * swapmode(), which is based on a program called swapinfo written by 89 * Kevin Lahey <kml@rokkaku.atl.ga.us>. 90 */ 91 92 #define NSWAP 16 93 94 static struct kvm_swap kvmsw[NSWAP]; 95 static int kvnsw, okvnsw; 96 97 static void calclens(void); 98 99 #define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize)) 100 101 static void 102 calclens(void) 103 { 104 int i, n; 105 int len; 106 107 dlen = sizeof("Disk"); 108 for (i = 0; i < kvnsw; ++i) { 109 len = strlen(kvmsw[i].ksw_devname); 110 if (dlen < len) 111 dlen = len; 112 } 113 114 ulen = sizeof("Used"); 115 for (n = CONVERT(kvmsw[kvnsw].ksw_used), len = 2; n /= 10; ++len); 116 if (ulen < len) 117 ulen = len; 118 } 119 120 int 121 initswap(void) 122 { 123 static int once = 0; 124 125 if (once) 126 return (1); 127 128 header = getbsize(&hlen, &blocksize); 129 pagesize = getpagesize(); 130 131 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 132 error("systat: kvm_getswapinfo failed"); 133 return (0); 134 } 135 okvnsw = kvnsw; 136 137 calclens(); 138 odlen = dlen; 139 oulen = ulen; 140 141 once = 1; 142 143 dsinit(12); 144 145 return (1); 146 } 147 148 void 149 fetchswap(void) 150 { 151 okvnsw = kvnsw; 152 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 153 error("systat: kvm_getswapinfo failed"); 154 return; 155 } 156 157 odlen = dlen; 158 oulen = ulen; 159 calclens(); 160 161 struct devinfo *tmp_dinfo; 162 163 tmp_dinfo = last_dev.dinfo; 164 last_dev.dinfo = cur_dev.dinfo; 165 cur_dev.dinfo = tmp_dinfo; 166 167 last_dev.snap_time = cur_dev.snap_time; 168 dsgetinfo( &cur_dev ); 169 } 170 171 void 172 labelswap(void) 173 { 174 const char *name; 175 int i; 176 177 fetchswap(); 178 179 werase(wnd); 180 181 mvwprintw(wnd, 0, 0, "%*s%*s%*s %s", 182 -dlen, "Disk", hlen, header, ulen, "Used", 183 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 184 185 for (i = 0; i <= kvnsw; ++i) { 186 if (i == kvnsw) { 187 if (kvnsw == 1) 188 break; 189 name = "Total"; 190 } else 191 name = kvmsw[i].ksw_devname; 192 mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name); 193 } 194 dslabel(12, 0, 18); 195 } 196 197 void 198 showswap(void) 199 { 200 int count; 201 int i; 202 203 if (kvnsw != okvnsw || dlen != odlen || ulen != oulen) 204 labelswap(); 205 206 for (i = 0; i <= kvnsw; ++i) { 207 if (i == kvnsw) { 208 if (kvnsw == 1) 209 break; 210 } 211 212 if (kvmsw[i].ksw_total == 0) { 213 mvwprintw( 214 wnd, 215 i + 1, 216 dlen + hlen + ulen + 1, 217 "(swap not configured)" 218 ); 219 continue; 220 } 221 222 wmove(wnd, i + 1, dlen); 223 224 wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total)); 225 wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used)); 226 227 count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1; 228 229 waddch(wnd, ' '); 230 while (count--) 231 waddch(wnd, 'X'); 232 wclrtoeol(wnd); 233 } 234 dsshow(12, 0, 18, &cur_dev, &last_dev); 235 } 236