1 /* $NetBSD: swap.c,v 1.17 2003/10/13 14:22:20 agc 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95"; 37 #endif 38 __RCSID("$NetBSD: swap.c,v 1.17 2003/10/13 14:22:20 agc Exp $"); 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/swap.h> 43 44 #include <errno.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.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, nswap, rnswap; 57 static int first = 1; 58 static struct swapent *swap_devices; 59 60 WINDOW * 61 openswap(void) 62 { 63 64 return (subwin(stdscr, -1, 0, 5, 0)); 65 } 66 67 void 68 closeswap(WINDOW *w) 69 { 70 71 if (w == NULL) 72 return; 73 wclear(w); 74 wrefresh(w); 75 delwin(w); 76 } 77 78 /* do nothing */ 79 int 80 initswap(void) 81 { 82 83 return (1); 84 } 85 86 void 87 fetchswap(void) 88 { 89 int update_label = 0; 90 91 first = 0; 92 nswap = swapctl(SWAP_NSWAP, 0, 0); 93 if (nswap < 0) 94 error("error: %s", strerror(errno)); 95 if (nswap == 0) 96 return; 97 update_label = (nswap != rnswap); 98 99 if (swap_devices) 100 (void)free(swap_devices); 101 if ((swap_devices = malloc(nswap * sizeof(*swap_devices))) == NULL) { 102 error("malloc failed"); 103 die(0); 104 } 105 106 if ((rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap)) != nswap) { 107 error("swapctl failed"); 108 die(0); 109 } 110 111 if (update_label) 112 labelswap(); 113 } 114 115 void 116 labelswap(void) 117 { 118 char *header; 119 int row; 120 121 row = 0; 122 wmove(wnd, row, 0); 123 wclrtobot(wnd); 124 if (first) 125 fetchswap(); 126 if (nswap == 0) { 127 mvwprintw(wnd, row++, 0, "No swap"); 128 return; 129 } 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 } 135 136 void 137 showswap(void) 138 { 139 int col, div, i, avail, used, xsize, free; 140 struct swapent *sep; 141 char *p; 142 143 div = blocksize / 512; 144 free = avail = 0; 145 for (sep = swap_devices, i = 0; i < nswap; i++, sep++) { 146 if (sep == NULL) 147 continue; 148 149 p = strrchr(sep->se_path, '/'); 150 p = p ? p+1 : sep->se_path; 151 152 mvwprintw(wnd, i + 1, 0, "%-5s", p); 153 154 col = 5; 155 mvwprintw(wnd, i + 1, col, "%*d", hlen, sep->se_nblks / div); 156 157 col += hlen; 158 xsize = sep->se_nblks; 159 used = sep->se_inuse; 160 avail += xsize; 161 free += xsize - used; 162 mvwprintw(wnd, i + 1, col, "%9d ", used / div); 163 wclrtoeol(wnd); 164 whline(wnd, 'X', (100 * used / xsize + 1) / 2); 165 } 166 /* do total if necessary */ 167 if (nswap > 1) { 168 used = avail - free; 169 mvwprintw(wnd, i + 1, 0, "%-5s%*d%9d ", 170 "Total", hlen, avail / div, used / div); 171 wclrtoeol(wnd); 172 whline(wnd, 'X', (100 * used / avail + 1) / 2); 173 } 174 } 175