1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/stat.h> 49 #include <sys/param.h> 50 #include <sys/user.h> 51 #include <sys/sysctl.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <fstab.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 #include <fcntl.h> 61 62 static void usage(void); 63 static int swap_on_off(char *name, int ignoreebusy); 64 static void swaplist(int, int, int); 65 66 enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; 67 68 int 69 main(int argc, char **argv) 70 { 71 struct fstab *fsp; 72 char *ptr; 73 int stat; 74 int ch, doall; 75 int sflag = 0, lflag = 0, hflag = 0; 76 77 if ((ptr = strrchr(argv[0], '/')) == NULL) 78 ptr = argv[0]; 79 if (strstr(ptr, "swapon")) 80 which_prog = SWAPON; 81 else if (strstr(ptr, "swapoff")) 82 which_prog = SWAPOFF; 83 orig_prog = which_prog; 84 85 doall = 0; 86 while ((ch = getopt(argc, argv, "AadlhksU")) != -1) { 87 switch(ch) { 88 case 'A': 89 if (which_prog == SWAPCTL) { 90 doall = 1; 91 which_prog = SWAPON; 92 } else { 93 usage(); 94 } 95 break; 96 case 'a': 97 if (which_prog == SWAPON || which_prog == SWAPOFF) 98 doall = 1; 99 else 100 which_prog = SWAPON; 101 break; 102 case 'd': 103 if (which_prog == SWAPCTL) 104 which_prog = SWAPOFF; 105 else 106 usage(); 107 break; 108 case 's': 109 sflag = 1; 110 break; 111 case 'l': 112 lflag = 1; 113 break; 114 case 'h': 115 hflag = 'M'; 116 break; 117 case 'k': 118 hflag = 'K'; 119 break; 120 case 'U': 121 if (which_prog == SWAPCTL) { 122 doall = 1; 123 which_prog = SWAPOFF; 124 } else { 125 usage(); 126 } 127 break; 128 case '?': 129 default: 130 usage(); 131 } 132 } 133 argv += optind; 134 135 stat = 0; 136 if (which_prog == SWAPON || which_prog == SWAPOFF) { 137 if (doall) { 138 while ((fsp = getfsent()) != NULL) { 139 if (strcmp(fsp->fs_type, FSTAB_SW)) 140 continue; 141 if (strstr(fsp->fs_mntops, "noauto")) 142 continue; 143 if (swap_on_off(fsp->fs_spec, 0)) { 144 stat = 1; 145 } else { 146 printf("%s: %sing %s as swap device\n", 147 getprogname(), which_prog == SWAPOFF ? "remov" : "add", 148 fsp->fs_spec); 149 } 150 } 151 } 152 else if (!*argv) 153 usage(); 154 for (; *argv; ++argv) { 155 if (swap_on_off(*argv, 0)) { 156 stat = 1; 157 } else if (orig_prog == SWAPCTL) { 158 printf("%s: %sing %s as swap device\n", 159 getprogname(), which_prog == SWAPOFF ? "remov" : "add", 160 *argv); 161 } 162 } 163 } else { 164 if (lflag || sflag) 165 swaplist(lflag, sflag, hflag); 166 else 167 usage(); 168 } 169 exit(stat); 170 } 171 172 static int 173 swap_on_off(char *name, int ignoreebusy) 174 { 175 if ((which_prog == SWAPOFF ? swapoff(name) : swapon(name)) == -1) { 176 switch (errno) { 177 case EBUSY: 178 if (!ignoreebusy) 179 warnx("%s: device already in use", name); 180 break; 181 default: 182 warn("%s", name); 183 break; 184 } 185 return(1); 186 } 187 return(0); 188 } 189 190 static void 191 usage(void) 192 { 193 fprintf(stderr, "usage: %s ", getprogname()); 194 switch(orig_prog) { 195 case SWAPOFF: 196 fprintf(stderr, "[-a] [special_file ...]\n"); 197 break; 198 case SWAPON: 199 fprintf(stderr, "[-a] [special_file ...]\n"); 200 break; 201 case SWAPCTL: 202 fprintf(stderr, "[-lshAU] [-a/-d special_file ...]\n"); 203 break; 204 } 205 exit(1); 206 } 207 208 static void 209 swaplist(int lflag, int sflag, int hflag) 210 { 211 size_t mibsize, size; 212 struct xswdev xsw; 213 int hlen, mib[16], n, pagesize; 214 long blocksize; 215 long long total = 0; 216 long long used = 0; 217 long long tmp_total; 218 long long tmp_used; 219 220 pagesize = getpagesize(); 221 switch(hflag) { 222 case 'K': 223 blocksize = 1024; 224 hlen = 10; 225 break; 226 case 'M': 227 blocksize = 1024 * 1024; 228 hlen = 10; 229 break; 230 default: 231 getbsize(&hlen, &blocksize); 232 break; 233 } 234 235 mibsize = sizeof mib / sizeof mib[0]; 236 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 237 err(1, "sysctlnametomib()"); 238 239 if (lflag) { 240 char buf[32]; 241 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 242 printf("%-13s %*s %*s\n", 243 "Device:", 244 hlen, buf, 245 hlen, "Used:"); 246 } 247 248 for (n = 0; ; ++n) { 249 mib[mibsize] = n; 250 size = sizeof xsw; 251 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, NULL) == -1) 252 break; 253 if (xsw.xsw_version != XSWDEV_VERSION) 254 errx(1, "xswdev version mismatch"); 255 256 tmp_total = (long long)xsw.xsw_nblks * pagesize / blocksize; 257 tmp_used = (long long)xsw.xsw_used * pagesize / blocksize; 258 total += tmp_total; 259 used += tmp_used; 260 if (lflag) { 261 printf("/dev/%-8s %*lld %*lld\n", 262 devname(xsw.xsw_dev, S_IFCHR), 263 hlen, tmp_total, 264 hlen, tmp_used); 265 } 266 } 267 if (errno != ENOENT) 268 err(1, "sysctl()"); 269 270 if (sflag) { 271 printf("Total: %*lld %*lld\n", 272 hlen, total, 273 hlen, used); 274 } 275 } 276 277