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. 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  * @(#)swap.c   8.3 (Berkeley) 4/29/95
  30  * $FreeBSD: src/usr.bin/systat/swap.c,v 1.12.2.2 2001/07/04 22:54:14 kris Exp $
  31  */
  32
  33 /*
  34  * swapinfo - based on a program of the same name by Kevin Lahey
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/conf.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/stat.h>
  41
  42 #include <kvm.h>
  43 #include <nlist.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47 #include <string.h>
  48 #include <err.h>
  49
  50 #include "systat.h"
  51 #include "extern.h"
  52
  53 void showspace(char *header, int hlen, long blocksize);
  54
  55 static long blocksize;
  56 static int hlen;
  57
  58 WINDOW *
  59 openswap(void)
  60 {
  61         return (subwin(stdscr, LINES-5-1, 0, 5, 0));
  62 }
  63
  64 void
  65 closeswap(WINDOW *w)
  66 {
  67         if (w == NULL)
  68                 return;
  69         wclear(w);
  70         wrefresh(w);
  71         delwin(w);
  72 }
  73
  74 /*
  75  * The meat of all the swap stuff is stolen from pstat(8)'s
  76  * swapmode(), which is based on a program called swapinfo written by
  77  * Kevin Lahey <kml@rokkaku.atl.ga.us>.
  78  */
  79
  80 int
  81 initswap(void)
  82 {
  83         char msgbuf[BUFSIZ];
  84         static int once = 0;
  85         struct kvm_swap dummy;
  86
  87         if (once)
  88                 return (1);
  89
  90         if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
  91                 snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
  92                 error("%s", msgbuf);
  93                 return (0);
  94         }
  95
  96         once = 1;
  97         return (1);
  98 }
  99
 100 static struct kvm_swap  kvmsw[16];
 101 static int kvnsw;
 102
 103 void
 104 fetchswap(void)
 105 {
 106         kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
 107 }
 108
 109 void
 110 labelswap(void)
 111 {
 112         char *header;
 113         int row, i;
 114
 115         fetchswap();
 116
 117         row = 0;
 118         wmove(wnd, row, 0); wclrtobot(wnd);
 119         header = getbsize(&hlen, &blocksize);
 120         mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
 121             "Disk", hlen, header, "Used",
 122             "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
 123
 124         for (i = 0; i < kvnsw; ++i) {
 125                 mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
 126         }
 127 }
 128
 129 void
 130 showswap(void)
 131 {
 132         int i;
 133         int pagesize = getpagesize();
 134
 135 #define CONVERT(v)      ((int)((quad_t)(v) * pagesize / blocksize))
 136
 137         for (i = 0; i <= kvnsw; ++i) {
 138                 int _col = 5;
 139                 int count;
 140
 141                 if (i == kvnsw) {
 142                         if (kvnsw == 1)
 143                                 break;
 144                         mvwprintw(
 145                             wnd,
 146                             i + 1,
 147                             0,
 148                             "%-5s",
 149                             "Total"
 150                         );
 151                 }
 152                 if (kvmsw[i].ksw_total == 0) {
 153                         mvwprintw(
 154                             wnd,
 155                             i + 1,
 156                             _col + 5,
 157                             "(swap not configured)"
 158                         );
 159                         continue;
 160                 }
 161
 162                 mvwprintw(
 163                     wnd,
 164                     i + 1,
 165                     _col,
 166                     "%*d",
 167                     hlen,
 168                     CONVERT(kvmsw[i].ksw_total)
 169                 );
 170                 _col += hlen;
 171
 172                 mvwprintw(
 173                     wnd,
 174                     i + 1,
 175                     _col,
 176                     "%9d  ",
 177                     CONVERT(kvmsw[i].ksw_used)
 178                 );
 179
 180                 count = (int)((double)kvmsw[i].ksw_used * 49.999 /
 181                     (double)kvmsw[i].ksw_total);
 182
 183                 while (count >= 0) {
 184                         waddch(wnd, 'X');
 185                         --count;
 186                 }
 187         }
 188 }