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 * 67 openswap(void) 68 { 69 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 70 } 71 72 void 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 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 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 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 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 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