usr.bin/systat/swap.c

   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  * @(#)swap.c   8.3 (Berkeley) 4/29/95
  34  * $FreeBSD: src/usr.bin/systat/swap.c,v 1.12.2.2 2001/07/04 22:54:14 kris Exp $
  35  * $DragonFly: src/usr.bin/systat/swap.c,v 1.3 2003/10/04 20:36:51 hmp Exp $
  36  */
  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/conf.h>
  44 #include <sys/ioctl.h>
  45 #include <sys/stat.h>
  46
  47 #include <kvm.h>
  48 #include <nlist.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <unistd.h>
  52 #include <string.h>
  53 #include <err.h>
  54
  55 #include "systat.h"
  56 #include "extern.h"
  57
  58 extern char *getbsize(int *headerlenp, long *blocksizep);
  59 void showspace(char *header, int hlen, long blocksize);
  60
  61 kvm_t   *kd;
  62
  63 static long blocksize;
  64 static int hlen;
  65
  66 WINDOW *
  67 openswap(void)
  68 {
  69         return (subwin(stdscr, LINES-5-1, 0, 5, 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 int
  89 initswap(void)
  90 {
  91         int i;
  92         char msgbuf[BUFSIZ];
  93         char *cp;
  94         static int once = 0;
  95         u_long ptr;
  96         struct kvm_swap dummy;
  97
  98         if (once)
  99                 return (1);
 100
 101         if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
 102                 snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
 103                 error("%s", msgbuf);
 104                 return (0);
 105         }
 106
 107         once = 1;
 108         return (1);
 109 }
 110
 111 static struct kvm_swap  kvmsw[16];
 112 static int kvnsw;
 113
 114 void
 115 fetchswap(void)
 116 {
 117         kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
 118 }
 119
 120 void
 121 labelswap()
 122 {
 123         char *header, *p;
 124         int row, i;
 125
 126         fetchswap();
 127
 128         row = 0;
 129         wmove(wnd, row, 0); wclrtobot(wnd);
 130         header = getbsize(&hlen, &blocksize);
 131         mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
 132             "Disk", hlen, header, "Used",
 133             "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
 134
 135         for (i = 0; i < kvnsw; ++i) {
 136                 mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
 137         }
 138 }
 139
 140 void
 141 showswap(void)
 142 {
 143         int i;
 144         int pagesize = getpagesize();
 145
 146 #define CONVERT(v)      ((int)((quad_t)(v) * pagesize / blocksize))
 147
 148         for (i = 0; i <= kvnsw; ++i) {
 149                 int col = 5;
 150                 int count;
 151
 152                 if (i == kvnsw) {
 153                         if (kvnsw == 1)
 154                                 break;
 155                         mvwprintw(
 156                             wnd,
 157                             i + 1,
 158                             col,
 159                             "%-5s",
 160                             "Total"
 161                         );
 162                         col += 5;
 163                 }
 164                 if (kvmsw[i].ksw_total == 0) {
 165                         mvwprintw(
 166                             wnd,
 167                             i + 1,
 168                             col + 5,
 169                             "(swap not configured)"
 170                         );
 171                         continue;
 172                 }
 173
 174                 mvwprintw(
 175                     wnd,
 176                     i + 1,
 177                     col,
 178                     "%*d",
 179                     hlen,
 180                     CONVERT(kvmsw[i].ksw_total)
 181                 );
 182                 col += hlen;
 183
 184                 mvwprintw(
 185                     wnd,
 186                     i + 1,
 187                     col,
 188                     "%9d  ",
 189                     CONVERT(kvmsw[i].ksw_used)
 190                 );
 191
 192                 count = (int)((double)kvmsw[i].ksw_used * 49.999 /
 193                     (double)kvmsw[i].ksw_total);
 194
 195                 while (count >= 0) {
 196                         waddch(wnd, 'X');
 197                         --count;
 198                 }
 199         }
 200 }