swap.c revision 1.8
1 /* $NetBSD: swap.c,v 1.8 1997/07/21 07:03:15 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 Matthew R. Green. All rights reserved. 5 * Copyright (c) 1980, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95"; 41 #endif 42 __RCSID("$NetBSD: swap.c,v 1.8 1997/07/21 07:03:15 mrg Exp $"); 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/buf.h> 47 #include <sys/conf.h> 48 #include <sys/ioctl.h> 49 #include <sys/stat.h> 50 51 #include <vm/vm_swap.h> 52 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <errno.h> 57 #include <unistd.h> 58 59 #include "systat.h" 60 #include "extern.h" 61 62 void showspace __P((char *header, int hlen, long blocksize)); 63 64 static long blocksize; 65 static int hlen, nswap, rnswap; 66 static int first = 1; 67 static struct swapent *swap_devices; 68 69 WINDOW * 70 openswap() 71 { 72 73 return (subwin(stdscr, LINES-5-1, 0, 5, 0)); 74 } 75 76 void 77 closeswap(w) 78 WINDOW *w; 79 { 80 81 if (w == NULL) 82 return; 83 wclear(w); 84 wrefresh(w); 85 delwin(w); 86 } 87 88 /* do nothing */ 89 int 90 initswap() 91 { 92 93 return (1); 94 } 95 96 void 97 fetchswap() 98 { 99 int update_label = 0; 100 101 first = 0; 102 nswap = swapctl(SWAP_NSWAP, 0, 0); 103 if (nswap < 0) 104 error("error: %s", strerror(errno)); 105 if (nswap == 0) 106 return; 107 update_label = (nswap != rnswap); 108 109 if (swap_devices) 110 (void)free(swap_devices); 111 swap_devices = (struct swapent *)malloc(nswap * sizeof(*swap_devices)); 112 if (swap_devices == NULL) 113 /* XXX */ ; /* XXX systat doesn't do errors! */ 114 115 rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap); 116 if (nswap < 0) 117 /* XXX */ ; /* XXX systat doesn't do errors! */ 118 if (nswap != rnswap) 119 /* XXX */ ; /* XXX systat doesn't do errors! */ 120 if (update_label) 121 labelswap(); 122 } 123 124 void 125 labelswap() 126 { 127 struct swapent *sep; 128 char *header, *p; 129 int row, i; 130 131 row = 0; 132 wmove(wnd, row, 0); 133 wclrtobot(wnd); 134 if (first) 135 fetchswap(); 136 if (nswap == 0) { 137 mvwprintw(wnd, row++, 0, "No swap"); 138 return; 139 } 140 header = getbsize(&hlen, &blocksize); 141 mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s", 142 "Disk", hlen, header, "Used", 143 "/0% /10% /20% /30% /40% /50% /60% /70% /80% /90% /100%"); 144 for (sep = swap_devices, i = 0; i < nswap; i++, sep++) { 145 if (sep == NULL) 146 continue; 147 p = sep ? devname(sep->se_dev, S_IFBLK) : "swfl"; 148 mvwprintw(wnd, i + 1, 0, "%-5s", p ? p : "??"); 149 } 150 } 151 152 void 153 showswap() { 154 int col, div, i, j, avail, used, xsize, free; 155 struct swapent *sep; 156 157 div = blocksize / 512; 158 free = avail = 0; 159 for (sep = swap_devices, i = 0; i < nswap; i++, sep++) { 160 if (sep == NULL) 161 continue; 162 col = 5; 163 mvwprintw(wnd, i + 1, col, "%*d", hlen, sep->se_nblks / div); 164 165 col += hlen; 166 xsize = sep->se_nblks; 167 used = sep->se_inuse; 168 avail += xsize; 169 free += xsize - used; 170 mvwprintw(wnd, i + 1, col, "%9d ", used / div); 171 for (j = (100 * used / xsize + 1) / 2; j > 0; j--) 172 waddch(wnd, 'X'); 173 wclrtoeol(wnd); 174 } 175 /* do total if necessary */ 176 if (nswap > 1) { 177 used = avail - free; 178 mvwprintw(wnd, i + 1, 0, "%-5s%*d%9d ", 179 "Total", hlen, avail / div, used / div); 180 for (j = (100 * used / avail + 1) / 2; j > 0; j--) 181 waddch(wnd, 'X'); 182 wclrtoeol(wnd); 183 } 184 } 185
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