1 /* $OpenBSD: swap.c,v 1.22 2008/12/07 02:56:06 canacar Exp $ */ 2 /* $NetBSD: swap.c,v 1.9 1998/12/26 07:05:08 marc Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 Matthew R. Green. All rights reserved. 6 * Copyright (c) 1980, 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. 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 34 #include <sys/cdefs.h> 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/conf.h> 38 #include <sys/ioctl.h> 39 #include <sys/stat.h> 40 #include <sys/swap.h> 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <errno.h> 46 #include <unistd.h> 47 48 #include "systat.h" 49 50 51 static long blocksize; 52 static int hlen, nswap, rnswap; 53 static struct swapent *swap_devices; 54 55 void print_sw(void); 56 int read_sw(void); 57 int select_sw(void); 58 static void showswap(int i); 59 static void showtotal(void); 60 61 62 field_def fields_sw[] = { 63 {"DISK", 6, 16, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0}, 64 {"BLOCKS", 5, 10, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0}, 65 {"USED", 5, 10, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0}, 66 {"", 40, 80, 1, FLD_ALIGN_BAR, -1, 0, 0, 100}, 67 }; 68 69 #define FIELD_ADDR(x) (&fields_sw[x]) 70 71 #define FLD_SW_NAME FIELD_ADDR(0) 72 #define FLD_SW_BLOCKS FIELD_ADDR(1) 73 #define FLD_SW_USED FIELD_ADDR(2) 74 #define FLD_SW_BAR FIELD_ADDR(3) 75 76 /* Define views */ 77 field_def *view_sw_0[] = { 78 FLD_SW_NAME, FLD_SW_BLOCKS, FLD_SW_USED, FLD_SW_BAR, NULL 79 }; 80 81 82 /* Define view managers */ 83 struct view_manager swap_mgr = { 84 "Swap", select_sw, read_sw, NULL, print_header, 85 print_sw, keyboard_callback, NULL, NULL 86 }; 87 88 field_view views_sw[] = { 89 {view_sw_0, "swap", '6', &swap_mgr}, 90 {NULL, NULL, 0, NULL} 91 }; 92 93 94 int 95 select_sw(void) 96 { 97 if (swap_devices == NULL || nswap == 0) 98 num_disp = 1; 99 else 100 num_disp = nswap; 101 if (nswap > 1) 102 num_disp++; 103 return (0); 104 } 105 106 int 107 read_sw(void) 108 { 109 num_disp = 1; 110 111 nswap = swapctl(SWAP_NSWAP, 0, 0); 112 113 if (nswap < 0) 114 error("error: %s", strerror(errno)); 115 if (nswap == 0) 116 return 0; 117 118 if (swap_devices) 119 (void)free(swap_devices); 120 121 swap_devices = (struct swapent *)calloc(nswap, sizeof(*swap_devices)); 122 if (swap_devices == NULL) 123 return 0; 124 125 rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap); 126 if (rnswap < 0 || nswap != rnswap) 127 return 0; 128 129 num_disp = nswap; 130 if (nswap > 1) 131 num_disp++; 132 133 return 0; 134 } 135 136 137 void 138 print_sw(void) 139 { 140 int n, count = 0; 141 142 if (swap_devices == NULL || nswap == 0) { 143 print_fld_str(FLD_SW_BAR, "No swap devices"); 144 return; 145 } 146 147 148 for (n = dispstart; n < num_disp; n++) { 149 if (n >= nswap) 150 showtotal(); 151 else 152 showswap(n); 153 count++; 154 if (maxprint > 0 && count >= maxprint) 155 break; 156 } 157 158 } 159 160 int 161 initswap(void) 162 { 163 field_view *v; 164 165 char *bs = getbsize(&hlen, &blocksize); 166 167 FLD_SW_BLOCKS->title = strdup(bs); 168 169 for (v = views_sw; v->name != NULL; v++) 170 add_view(v); 171 172 return(1); 173 } 174 175 176 static void 177 showswap(int i) 178 { 179 int d, used, xsize; 180 struct swapent *sep; 181 char *p; 182 183 d = blocksize / 512; 184 185 sep = &swap_devices[i]; 186 187 p = strrchr(sep->se_path, '/'); 188 p = p ? p+1 : sep->se_path; 189 190 print_fld_str(FLD_SW_NAME, p); 191 192 xsize = sep->se_nblks; 193 used = sep->se_inuse; 194 195 print_fld_uint(FLD_SW_BLOCKS, xsize / d); 196 print_fld_uint(FLD_SW_USED, used / d); 197 print_fld_bar(FLD_SW_BAR, 100 * used / xsize); 198 199 end_line(); 200 } 201 202 static void 203 showtotal(void) 204 { 205 struct swapent *sep; 206 int d, i, avail, used, xsize, mfree; 207 208 d = blocksize / 512; 209 mfree = avail = 0; 210 211 for (sep = swap_devices, i = 0; i < nswap; i++, sep++) { 212 xsize = sep->se_nblks; 213 used = sep->se_inuse; 214 avail += xsize; 215 mfree += xsize - used; 216 } 217 used = avail - mfree; 218 219 print_fld_str(FLD_SW_NAME, "Total"); 220 print_fld_uint(FLD_SW_BLOCKS, avail / d); 221 print_fld_uint(FLD_SW_USED, used / d); 222 print_fld_bar(FLD_SW_BAR, 100 * used / avail); 223 224 end_line(); 225 } 226