usr.bin/systat/swap.c

   1 /*      $NetBSD: swap.c,v 1.19 2006/03/18 11:02:48 dsl Exp $    */
   2
   3 /*
   4  * Copyright (c) 1997 Matthew R. Green.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 /*-
  30  * Copyright (c) 1980, 1992, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #include <sys/cdefs.h>
  59 #ifndef lint
  60 #if 0
  61 static char sccsid[] = "@(#)swap.c      8.3 (Berkeley) 4/29/95";
  62 #endif
  63 __RCSID("$NetBSD: swap.c,v 1.19 2006/03/18 11:02:48 dsl Exp $");
  64 #endif /* not lint */
  65
  66 #include <sys/param.h>
  67 #include <sys/swap.h>
  68
  69 #include <errno.h>
  70 #include <stdio.h>
  71 #include <stdlib.h>
  72 #include <string.h>
  73 #include <unistd.h>
  74
  75 #include "systat.h"
  76 #include "extern.h"
  77
  78 void showspace(char *header, int hlen, long blocksize);
  79
  80 static  long blocksize;
  81 static  int hlen, nswap, rnswap;
  82 static  int first = 1;
  83 static  struct swapent *swap_devices;
  84
  85 WINDOW *
  86 openswap(void)
  87 {
  88
  89         return (subwin(stdscr, -1, 0, 5, 0));
  90 }
  91
  92 void
  93 closeswap(WINDOW *w)
  94 {
  95
  96         if (w == NULL)
  97                 return;
  98         wclear(w);
  99         wrefresh(w);
 100         delwin(w);
 101 }
 102
 103 /* do nothing */
 104 int
 105 initswap(void)
 106 {
 107
 108         return (1);
 109 }
 110
 111 void
 112 fetchswap(void)
 113 {
 114         int     update_label = 0;
 115
 116         first = 0;
 117         nswap = swapctl(SWAP_NSWAP, 0, 0);
 118         if (nswap < 0)
 119                 error("error: %s", strerror(errno));
 120         if (nswap == 0)
 121                 return;
 122         update_label = (nswap != rnswap);
 123
 124         if (swap_devices)
 125                 (void)free(swap_devices);
 126         if ((swap_devices = malloc(nswap * sizeof(*swap_devices))) == NULL) {
 127                 error("malloc failed");
 128                 die(0);
 129         }
 130
 131         if ((rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap)) != nswap) {
 132                 error("swapctl failed");
 133                 die(0);
 134         }
 135
 136         if (update_label)
 137                 labelswap();
 138 }
 139
 140 void
 141 labelswap(void)
 142 {
 143         char    *header;
 144         int     row;
 145
 146         row = 0;
 147         wmove(wnd, row, 0);
 148         wclrtobot(wnd);
 149         if (first)
 150                 fetchswap();
 151         if (nswap == 0) {
 152                 mvwprintw(wnd, row++, 0, "No swap");
 153                 return;
 154         }
 155         header = getbsize(&hlen, &blocksize);
 156         mvwprintw(wnd, row++, 0, "%-5s%*s%9s  %55s",
 157             "Disk", hlen, header, "Used",
 158             "/0%  /10% /20% /30% /40% /50% /60% /70% /80% /90% /100%");
 159 }
 160
 161 void
 162 showswap(void)
 163 {
 164         int     col, blk_div, i, avail, used, xsize, swp_free;
 165         struct  swapent *sep;
 166         char    *p;
 167
 168         blk_div = blocksize / 512;
 169         swp_free = avail = 0;
 170         for (sep = swap_devices, i = 0; i < nswap; i++, sep++) {
 171                 p = strrchr(sep->se_path, '/');
 172                 p = p ? p+1 : sep->se_path;
 173
 174                 mvwprintw(wnd, i + 1, 0, "%-5s", p);
 175
 176                 col = 5;
 177                 mvwprintw(wnd, i + 1, col, "%*d", hlen, sep->se_nblks / blk_div);
 178
 179                 col += hlen;
 180                 xsize = sep->se_nblks;
 181                 used = sep->se_inuse;
 182                 avail += xsize;
 183                 swp_free += xsize - used;
 184                 mvwprintw(wnd, i + 1, col, "%9d  ", used / blk_div);
 185                 wclrtoeol(wnd);
 186                 whline(wnd, 'X', (100 * used / xsize + 1) / 2);
 187         }
 188         /* do total if necessary */
 189         if (nswap > 1) {
 190                 used = avail - swp_free;
 191                 mvwprintw(wnd, i + 1, 0, "%-5s%*d%9d  ",
 192                     "Total", hlen, avail / blk_div, used / blk_div);
 193                 wclrtoeol(wnd);
 194                 whline(wnd, 'X', (100 * used / avail + 1) / 2);
 195         }
 196 }