1 /* $OpenBSD: swap.c,v 1.24 2012/12/05 23:20:26 deraadt 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/param.h> 35 #include <sys/buf.h> 36 #include <sys/conf.h> 37 #include <sys/ioctl.h> 38 #include <sys/stat.h> 39 #include <sys/swap.h> 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <errno.h> 45 #include <unistd.h> 46 47 #include "systat.h" 48 49 50 static long blocksize; 51 static int hlen, nswap, rnswap; 52 static struct swapent *swap_devices; 53 54 void print_sw(void); 55 int read_sw(void); 56 int select_sw(void); 57 static void showswap(int i); 58 static void showtotal(void); 59 60 61 field_def fields_sw[] = { 62 {"DISK", 6, 16, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0}, 63 {"BLOCKS", 5, 10, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0}, 64 {"USED", 5, 10, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0}, 65 {"", 40, 80, 1, FLD_ALIGN_BAR, -1, 0, 0, 100}, 66 }; 67 68 #define FLD_SW_NAME FIELD_ADDR(fields_sw,0) 69 #define FLD_SW_BLOCKS FIELD_ADDR(fields_sw,1) 70 #define FLD_SW_USED FIELD_ADDR(fields_sw,2) 71 #define FLD_SW_BAR FIELD_ADDR(fields_sw,3) 72 73 /* Define views */ 74 field_def *view_sw_0[] = { 75 FLD_SW_NAME, FLD_SW_BLOCKS, FLD_SW_USED, FLD_SW_BAR, NULL 76 }; 77 78 79 /* Define view managers */ 80 struct view_manager swap_mgr = { 81 "Swap", select_sw, read_sw, NULL, print_header, 82 print_sw, keyboard_callback, NULL, NULL 83 }; 84 85 field_view views_sw[] = { 86 {view_sw_0, "swap", '6', &swap_mgr}, 87 {NULL, NULL, 0, NULL} 88 }; 89 90 91 int 92 select_sw(void) 93 { 94 if (swap_devices == NULL || nswap == 0) 95 num_disp = 1; 96 else 97 num_disp = nswap; 98 if (nswap > 1) 99 num_disp++; 100 return (0); 101 } 102 103 int 104 read_sw(void) 105 { 106 num_disp = 1; 107 108 nswap = swapctl(SWAP_NSWAP, 0, 0); 109 110 if (nswap < 0) 111 error("error: %s", strerror(errno)); 112 if (nswap == 0) 113 return 0; 114 115 if (swap_devices) 116 (void)free(swap_devices); 117 118 swap_devices = (struct swapent *)calloc(nswap, sizeof(*swap_devices)); 119 if (swap_devices == NULL) 120 return 0; 121 122 rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap); 123 if (rnswap < 0 || nswap != rnswap) 124 return 0; 125 126 num_disp = nswap; 127 if (nswap > 1) 128 num_disp++; 129 130 return 0; 131 } 132 133 134 void 135 print_sw(void) 136 { 137 int n, count = 0; 138 139 if (swap_devices == NULL || nswap == 0) { 140 print_fld_str(FLD_SW_BAR, "No swap devices"); 141 return; 142 } 143 144 145 for (n = dispstart; n < num_disp; n++) { 146 if (n >= nswap) 147 showtotal(); 148 else 149 showswap(n); 150 count++; 151 if (maxprint > 0 && count >= maxprint) 152 break; 153 } 154 155 } 156 157 int 158 initswap(void) 159 { 160 field_view *v; 161 162 char *bs = getbsize(&hlen, &blocksize); 163 164 FLD_SW_BLOCKS->title = strdup(bs); 165 166 for (v = views_sw; v->name != NULL; v++) 167 add_view(v); 168 169 return(1); 170 } 171 172 173 static void 174 showswap(int i) 175 { 176 int d, used, xsize; 177 struct swapent *sep; 178 char *p; 179 180 d = blocksize / 512; 181 182 sep = &swap_devices[i]; 183 184 p = strrchr(sep->se_path, '/'); 185 p = p ? p+1 : sep->se_path; 186 187 print_fld_str(FLD_SW_NAME, p); 188 189 xsize = sep->se_nblks; 190 used = sep->se_inuse; 191 192 print_fld_uint(FLD_SW_BLOCKS, xsize / d); 193 print_fld_uint(FLD_SW_USED, used / d); 194 print_fld_bar(FLD_SW_BAR, 100 * used / xsize); 195 196 end_line(); 197 } 198 199 static void 200 showtotal(void) 201 { 202 struct swapent *sep; 203 int d, i, avail, used, xsize, mfree; 204 205 d = blocksize / 512; 206 mfree = avail = 0; 207 208 for (sep = swap_devices, i = 0; i < nswap; i++, sep++) { 209 xsize = sep->se_nblks; 210 used = sep->se_inuse; 211 avail += xsize; 212 mfree += xsize - used; 213 } 214 used = avail - mfree; 215 216 print_fld_str(FLD_SW_NAME, "Total"); 217 print_fld_uint(FLD_SW_BLOCKS, avail / d); 218 print_fld_uint(FLD_SW_USED, used / d); 219 print_fld_bar(FLD_SW_BAR, 100 * used / avail); 220 221 end_line(); 222 } 223