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 1.5 2008/11/10 04:59:45 swildner 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 void showspace(char *header, int hlen, long blocksize);
  59
  60 kvm_t   *kd;
  61
  62 static long blocksize;
  63 static int hlen;
  64
  65 WINDOW *
  66 openswap(void)
  67 {
  68         return (subwin(stdscr, LINES-5-1, 0, 5, 0));
  69 }
  70
  71 void
  72 closeswap(WINDOW *w)
  73 {
  74         if (w == NULL)
  75                 return;
  76         wclear(w);
  77         wrefresh(w);
  78         delwin(w);
  79 }
  80
  81 /*
  82  * The meat of all the swap stuff is stolen from pstat(8)'s
  83  * swapmode(), which is based on a program called swapinfo written by
  84  * Kevin Lahey <kml@rokkaku.atl.ga.us>.
  85  */
  86
  87 int
  88 initswap(void)
  89 {
  90         char msgbuf[BUFSIZ];
  91         static int once = 0;
  92         struct kvm_swap dummy;
  93
  94         if (once)
  95                 return (1);
  96
  97         if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
  98                 snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
  99                 error("%s", msgbuf);
 100                 return (0);
 101         }
 102
 103         once = 1;
 104         return (1);
 105 }
 106
 107 static struct kvm_swap  kvmsw[16];
 108 static int kvnsw;
 109
 110 void
 111 fetchswap(void)
 112 {
 113         kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
 114 }
 115
 116 void
 117 labelswap(void)
 118 {
 119         char *header;
 120         int row, i;
 121
 122         fetchswap();
 123
 124         row = 0;
 125         wmove(wnd, row, 0); wclrtobot(wnd);
 126         header = getbsize(&hlen, &blocksize);
 127         mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
 128             "Disk", hlen, header, "Used",
 129             "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
 130
 131         for (i = 0; i < kvnsw; ++i) {
 132                 mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
 133         }
 134 }
 135
 136 void
 137 showswap(void)
 138 {
 139         int i;
 140         int pagesize = getpagesize();
 141
 142 #define CONVERT(v)      ((int)((quad_t)(v) * pagesize / blocksize))
 143
 144         for (i = 0; i <= kvnsw; ++i) {
 145                 int _col = 5;
 146                 int count;
 147
 148                 if (i == kvnsw) {
 149                         if (kvnsw == 1)
 150                                 break;
 151                         mvwprintw(
 152                             wnd,
 153                             i + 1,
 154                             _col,
 155                             "%-5s",
 156                             "Total"
 157                         );
 158                         _col += 5;
 159                 }
 160                 if (kvmsw[i].ksw_total == 0) {
 161                         mvwprintw(
 162                             wnd,
 163                             i + 1,
 164                             _col + 5,
 165                             "(swap not configured)"
 166                         );
 167                         continue;
 168                 }
 169
 170                 mvwprintw(
 171                     wnd,
 172                     i + 1,
 173                     _col,
 174                     "%*d",
 175                     hlen,
 176                     CONVERT(kvmsw[i].ksw_total)
 177                 );
 178                 _col += hlen;
 179
 180                 mvwprintw(
 181                     wnd,
 182                     i + 1,
 183                     _col,
 184                     "%9d  ",
 185                     CONVERT(kvmsw[i].ksw_used)
 186                 );
 187
 188                 count = (int)((double)kvmsw[i].ksw_used * 49.999 /
 189                     (double)kvmsw[i].ksw_total);
 190
 191                 while (count >= 0) {
 192                         waddch(wnd, 'X');
 193                         --count;
 194                 }
 195         }
 196 }