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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifdef lint 39 static const char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95"; 40 #endif 41 42 /* 43 * swapinfo - based on a program of the same name by Kevin Lahey 44 */ 45 46 #include <sys/param.h> 47 #include <sys/ioctl.h> 48 #include <sys/stat.h> 49 50 #include <kvm.h> 51 #include <nlist.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 #include <string.h> 56 #include <err.h> 57 58 #include "systat.h" 59 #include "extern.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() 72 { 73 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0)); 74 } 75 76 void 77 closeswap(w) 78 WINDOW *w; 79 { 80 if (w == NULL) 81 return; 82 wclear(w); 83 wrefresh(w); 84 delwin(w); 85 } 86 87 /* 88 * The meat of all the swap stuff is stolen from pstat(8)'s 89 * swapmode(), which is based on a program called swapinfo written by 90 * Kevin Lahey <kml@rokkaku.atl.ga.us>. 91 */ 92 93 #define NSWAP 16 94 95 static struct kvm_swap kvmsw[NSWAP]; 96 static int kvnsw, okvnsw; 97 98 static void calclens(void); 99 100 #define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize)) 101 102 static void 103 calclens() 104 { 105 int i, n; 106 int len; 107 108 dlen = sizeof("Disk"); 109 for (i = 0; i < kvnsw; ++i) { 110 len = strlen(kvmsw[i].ksw_devname); 111 if (dlen < len) 112 dlen = len; 113 } 114 115 ulen = sizeof("Used"); 116 for (n = CONVERT(kvmsw[kvnsw].ksw_used), len = 2; n /= 10; ++len); 117 if (ulen < len) 118 ulen = len; 119 } 120 121 int 122 initswap() 123 { 124 static int once = 0; 125 126 if (once) 127 return (1); 128 129 header = getbsize(&hlen, &blocksize); 130 pagesize = getpagesize(); 131 132 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 133 error("systat: kvm_getswapinfo failed"); 134 return (0); 135 } 136 okvnsw = kvnsw; 137 138 calclens(); 139 odlen = dlen; 140 oulen = ulen; 141 142 once = 1; 143 return (1); 144 } 145 146 void 147 fetchswap() 148 { 149 150 okvnsw = kvnsw; 151 if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) { 152 error("systat: kvm_getswapinfo failed"); 153 return; 154 } 155 156 odlen = dlen; 157 oulen = ulen; 158 calclens(); 159 } 160 161 void 162 labelswap() 163 { 164 const char *name; 165 int i; 166 167 fetchswap(); 168 169 werase(wnd); 170 171 mvwprintw(wnd, 0, 0, "%*s%*s%*s %s", 172 -dlen, "Disk", hlen, header, ulen, "Used", 173 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 174 175 for (i = 0; i <= kvnsw; ++i) { 176 if (i == kvnsw) { 177 if (kvnsw == 1) 178 break; 179 name = "Total"; 180 } else 181 name = kvmsw[i].ksw_devname; 182 mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name); 183 } 184 } 185 186 void 187 showswap() 188 { 189 int count; 190 int i; 191 192 if (kvnsw != okvnsw || dlen != odlen || ulen != oulen) 193 labelswap(); 194 195 for (i = 0; i <= kvnsw; ++i) { 196 if (i == kvnsw) { 197 if (kvnsw == 1) 198 break; 199 } 200 201 if (kvmsw[i].ksw_total == 0) { 202 mvwprintw( 203 wnd, 204 i + 1, 205 dlen + hlen + ulen + 1, 206 "(swap not configured)" 207 ); 208 continue; 209 } 210 211 wmove(wnd, i + 1, dlen); 212 213 wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total)); 214 wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used)); 215 216 count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1; 217 218 waddch(wnd, ' '); 219 while (count--) 220 waddch(wnd, 'X'); 221 wclrtoeol(wnd); 222 } 223 } 224