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(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 return (1); 143 } 144 145 void 146 fetchswap(void) 147 { 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 } 159 160 void 161 labelswap(void) 162 { 163 const char *name; 164 int i; 165 166 fetchswap(); 167 168 werase(wnd); 169 170 mvwprintw(wnd, 0, 0, "%*s%*s%*s %s", 171 -dlen, "Disk", hlen, header, ulen, "Used", 172 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 173 174 for (i = 0; i <= kvnsw; ++i) { 175 if (i == kvnsw) { 176 if (kvnsw == 1) 177 break; 178 name = "Total"; 179 } else 180 name = kvmsw[i].ksw_devname; 181 mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name); 182 } 183 } 184 185 void 186 showswap(void) 187 { 188 int count; 189 int i; 190 191 if (kvnsw != okvnsw || dlen != odlen || ulen != oulen) 192 labelswap(); 193 194 for (i = 0; i <= kvnsw; ++i) { 195 if (i == kvnsw) { 196 if (kvnsw == 1) 197 break; 198 } 199 200 if (kvmsw[i].ksw_total == 0) { 201 mvwprintw( 202 wnd, 203 i + 1, 204 dlen + hlen + ulen + 1, 205 "(swap not configured)" 206 ); 207 continue; 208 } 209 210 wmove(wnd, i + 1, dlen); 211 212 wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total)); 213 wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used)); 214 215 count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1; 216 217 waddch(wnd, ' '); 218 while (count--) 219 waddch(wnd, 'X'); 220 wclrtoeol(wnd); 221 } 222 } 223