1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/disk.h> 34 #include <sys/disklabel.h> 35 #include <sys/mdioctl.h> 36 #include <sys/stat.h> 37 #include <sys/sysctl.h> 38 #include <sys/wait.h> 39 #include <vm/vm_param.h> 40 #include <vm/swap_pager.h> 41 42 #include <err.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <fnmatch.h> 46 #include <fstab.h> 47 #include <libgen.h> 48 #include <libutil.h> 49 #include <limits.h> 50 #include <paths.h> 51 #include <stdarg.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 static void usage(void) __dead2; 58 static const char *swap_on_off(const char *, int, char *); 59 static const char *swap_on_off_geli(const char *, char *, int); 60 static const char *swap_on_off_md(const char *, char *, int); 61 static const char *swap_on_off_sfile(const char *, int); 62 static void swaplist(int, int, int); 63 static int run_cmd(int *, const char *, ...) __printflike(2, 3); 64 65 static enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; 66 67 static int Eflag, fflag, qflag; 68 69 int 70 main(int argc, char **argv) 71 { 72 struct fstab *fsp; 73 const char *swfile; 74 char *ptr; 75 int ret, ch, doall; 76 int sflag, lflag, late, hflag; 77 const char *etc_fstab; 78 79 sflag = lflag = late = hflag = 0; 80 if ((ptr = strrchr(argv[0], '/')) == NULL) 81 ptr = argv[0]; 82 if (strstr(ptr, "swapon") != NULL) 83 which_prog = SWAPON; 84 else if (strstr(ptr, "swapoff") != NULL) 85 which_prog = SWAPOFF; 86 orig_prog = which_prog; 87 88 doall = 0; 89 etc_fstab = NULL; 90 while ((ch = getopt(argc, argv, "AadEfghklLmqsUF:")) != -1) { 91 switch(ch) { 92 case 'A': 93 if (which_prog == SWAPCTL) { 94 doall = 1; 95 which_prog = SWAPON; 96 } else 97 usage(); 98 break; 99 case 'a': 100 if (which_prog == SWAPON || which_prog == SWAPOFF) 101 doall = 1; 102 else 103 which_prog = SWAPON; 104 break; 105 case 'd': 106 if (which_prog == SWAPCTL) 107 which_prog = SWAPOFF; 108 else 109 usage(); 110 break; 111 case 'E': 112 if (which_prog == SWAPON) 113 Eflag = 2; 114 else 115 usage(); 116 break; 117 case 'f': 118 if (which_prog == SWAPOFF) 119 fflag = 1; 120 else 121 usage(); 122 break; 123 case 'g': 124 hflag = 'G'; 125 break; 126 case 'h': 127 hflag = 'H'; 128 break; 129 case 'k': 130 hflag = 'K'; 131 break; 132 case 'l': 133 lflag = 1; 134 break; 135 case 'L': 136 late = 1; 137 break; 138 case 'm': 139 hflag = 'M'; 140 break; 141 case 'q': 142 if (which_prog == SWAPON || which_prog == SWAPOFF) 143 qflag = 1; 144 break; 145 case 's': 146 sflag = 1; 147 break; 148 case 'U': 149 if (which_prog == SWAPCTL) { 150 doall = 1; 151 which_prog = SWAPOFF; 152 } else 153 usage(); 154 break; 155 case 'F': 156 etc_fstab = optarg; 157 break; 158 case '?': 159 default: 160 usage(); 161 } 162 } 163 argv += optind; 164 165 ret = 0; 166 swfile = NULL; 167 if (etc_fstab != NULL) 168 setfstab(etc_fstab); 169 if (which_prog == SWAPON || which_prog == SWAPOFF) { 170 if (doall) { 171 while ((fsp = getfsent()) != NULL) { 172 if (strcmp(fsp->fs_type, FSTAB_SW) != 0) 173 continue; 174 if (strstr(fsp->fs_mntops, "noauto") != NULL) 175 continue; 176 if (which_prog != SWAPOFF && 177 strstr(fsp->fs_mntops, "late") && 178 late == 0) 179 continue; 180 if (which_prog == SWAPOFF && 181 strstr(fsp->fs_mntops, "late") == NULL && 182 late != 0) 183 continue; 184 Eflag |= (strstr(fsp->fs_mntops, "trimonce") != NULL); 185 swfile = swap_on_off(fsp->fs_spec, 1, 186 fsp->fs_mntops); 187 Eflag &= ~1; 188 if (swfile == NULL) { 189 ret = 1; 190 continue; 191 } 192 if (qflag == 0) { 193 printf("%s: %sing %s as swap device\n", 194 getprogname(), 195 (which_prog == SWAPOFF) ? 196 "remov" : "add", swfile); 197 } 198 } 199 } else if (*argv == NULL) 200 usage(); 201 for (; *argv; ++argv) { 202 swfile = swap_on_off(*argv, 0, NULL); 203 if (swfile == NULL) { 204 ret = 1; 205 continue; 206 } 207 if (orig_prog == SWAPCTL) { 208 printf("%s: %sing %s as swap device\n", 209 getprogname(), 210 (which_prog == SWAPOFF) ? "remov" : "add", 211 swfile); 212 } 213 } 214 } else { 215 if (lflag || sflag) 216 swaplist(lflag, sflag, hflag); 217 else 218 usage(); 219 } 220 exit(ret); 221 } 222 223 static const char * 224 swap_on_off(const char *name, int doingall, char *mntops) 225 { 226 char *base, *basebuf; 227 228 /* Swap on vnode-backed md(4) device. */ 229 if (mntops != NULL && 230 (fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 || 231 fnmatch(MD_NAME "[0-9]*", name, 0) == 0 || 232 strncmp(_PATH_DEV MD_NAME, name, 233 sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 || 234 strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0)) 235 return (swap_on_off_md(name, mntops, doingall)); 236 237 basebuf = strdup(name); 238 base = basename(basebuf); 239 240 /* Swap on encrypted device by GEOM_ELI. */ 241 if (fnmatch("*.eli", base, 0) == 0) { 242 free(basebuf); 243 return (swap_on_off_geli(name, mntops, doingall)); 244 } 245 246 /* Swap on special file. */ 247 free(basebuf); 248 return (swap_on_off_sfile(name, doingall)); 249 } 250 251 /* Strip off .bde or .eli suffix from swap device name */ 252 static char * 253 swap_basename(const char *name) 254 { 255 char *dname, *p; 256 257 dname = strdup(name); 258 p = strrchr(dname, '.'); 259 /* assert(p != NULL); */ 260 *p = '\0'; 261 262 return (dname); 263 } 264 265 /* Build geli(8) arguments from mntops */ 266 static char * 267 swap_on_geli_args(const char *mntops) 268 { 269 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 270 const char *aflag, *eflag, *lflag, *Tflag, *sflag; 271 char *p, *args, *token, *string, *ops; 272 int pagesize; 273 size_t pagesize_len; 274 u_long ul; 275 276 /* Use built-in defaults for geli(8). */ 277 aalgo = ealgo = keylen_str = ""; 278 aflag = eflag = lflag = Tflag = ""; 279 280 /* We will always specify sectorsize. */ 281 sflag = " -s "; 282 sectorsize_str = NULL; 283 284 if (mntops != NULL) { 285 string = ops = strdup(mntops); 286 287 while ((token = strsep(&string, ",")) != NULL) { 288 if ((p = strstr(token, "aalgo=")) == token) { 289 aalgo = p + sizeof("aalgo=") - 1; 290 aflag = " -a "; 291 } else if ((p = strstr(token, "ealgo=")) == token) { 292 ealgo = p + sizeof("ealgo=") - 1; 293 eflag = " -e "; 294 } else if ((p = strstr(token, "keylen=")) == token) { 295 keylen_str = p + sizeof("keylen=") - 1; 296 errno = 0; 297 ul = strtoul(keylen_str, &p, 10); 298 if (errno == 0) { 299 if (*p != '\0' || ul > INT_MAX) 300 errno = EINVAL; 301 } 302 if (errno) { 303 warn("Invalid keylen: %s", keylen_str); 304 free(ops); 305 return (NULL); 306 } 307 lflag = " -l "; 308 } else if ((p = strstr(token, "sectorsize=")) == token) { 309 sectorsize_str = p + sizeof("sectorsize=") - 1; 310 errno = 0; 311 ul = strtoul(sectorsize_str, &p, 10); 312 if (errno == 0) { 313 if (*p != '\0' || ul > INT_MAX) 314 errno = EINVAL; 315 } 316 if (errno) { 317 warn("Invalid sectorsize: %s", 318 sectorsize_str); 319 free(ops); 320 return (NULL); 321 } 322 } else if (strcmp(token, "notrim") == 0) { 323 if (Eflag) { 324 warn("Options \"notrim\" and " 325 "\"trimonce\" conflict"); 326 free(ops); 327 return (NULL); 328 } 329 Tflag = " -T "; 330 } else if (strcmp(token, "late") == 0) { 331 /* ignore known option */ 332 } else if (strcmp(token, "noauto") == 0) { 333 /* ignore known option */ 334 } else if (strcmp(token, "sw") == 0) { 335 /* ignore known option */ 336 } else if (strcmp(token, "trimonce") == 0) { 337 /* ignore known option */ 338 } else { 339 warnx("Invalid option: %s", token); 340 free(ops); 341 return (NULL); 342 } 343 } 344 } else 345 ops = NULL; 346 347 /* 348 * If we do not have a sector size at this point, fill in 349 * pagesize as sector size. 350 */ 351 if (sectorsize_str == NULL) { 352 /* Use pagesize as default sectorsize. */ 353 pagesize = getpagesize(); 354 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 355 p = alloca(pagesize_len); 356 snprintf(p, pagesize_len, "%d", pagesize); 357 sectorsize_str = p; 358 } 359 360 (void)asprintf(&args, "%s%s%s%s%s%s%s%s%s -d", 361 aflag, aalgo, eflag, ealgo, lflag, keylen_str, Tflag, 362 sflag, sectorsize_str); 363 364 free(ops); 365 return (args); 366 } 367 368 static const char * 369 swap_on_off_geli(const char *name, char *mntops, int doingall) 370 { 371 struct stat sb; 372 char *dname, *args; 373 int error; 374 375 error = stat(name, &sb); 376 377 if (which_prog == SWAPON) do { 378 /* Skip if the .eli device already exists. */ 379 if (error == 0) 380 break; 381 382 args = swap_on_geli_args(mntops); 383 if (args == NULL) 384 return (NULL); 385 386 dname = swap_basename(name); 387 if (dname == NULL) { 388 free(args); 389 return (NULL); 390 } 391 392 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args, 393 dname); 394 395 free(dname); 396 free(args); 397 398 if (error) { 399 /* error occurred during creation. */ 400 if (qflag == 0) 401 warnx("%s: Invalid parameters", name); 402 return (NULL); 403 } 404 } while (0); 405 406 return (swap_on_off_sfile(name, doingall)); 407 } 408 409 static const char * 410 swap_on_off_md(const char *name, char *mntops, int doingall) 411 { 412 FILE *sfd; 413 int fd, mdunit, error; 414 const char *ret; 415 static char mdpath[PATH_MAX], linebuf[PATH_MAX]; 416 char *p, *vnodefile; 417 size_t linelen; 418 u_long ul; 419 420 fd = -1; 421 sfd = NULL; 422 if (strlen(name) == (sizeof(MD_NAME) - 1)) 423 mdunit = -1; 424 else { 425 errno = 0; 426 ul = strtoul(name + 2, &p, 10); 427 if (errno == 0) { 428 if (*p != '\0' || ul > INT_MAX) 429 errno = EINVAL; 430 } 431 if (errno) { 432 warn("Bad device unit: %s", name); 433 return (NULL); 434 } 435 mdunit = (int)ul; 436 } 437 438 vnodefile = NULL; 439 if ((p = strstr(mntops, "file=")) != NULL) { 440 vnodefile = strdup(p + sizeof("file=") - 1); 441 p = strchr(vnodefile, ','); 442 if (p != NULL) 443 *p = '\0'; 444 } 445 if (vnodefile == NULL) { 446 warnx("file option not found for %s", name); 447 return (NULL); 448 } 449 450 if (which_prog == SWAPON) { 451 if (mdunit == -1) { 452 error = run_cmd(&fd, "%s -l -n -f %s", 453 _PATH_MDCONFIG, vnodefile); 454 if (error == 0) { 455 /* md device found. Ignore it. */ 456 close(fd); 457 if (!qflag) 458 warnx("%s: Device already in use", 459 vnodefile); 460 free(vnodefile); 461 return (NULL); 462 } 463 error = run_cmd(&fd, "%s -a -t vnode -n -f %s", 464 _PATH_MDCONFIG, vnodefile); 465 if (error) { 466 warnx("mdconfig (attach) error: file=%s", 467 vnodefile); 468 free(vnodefile); 469 return (NULL); 470 } 471 sfd = fdopen(fd, "r"); 472 if (sfd == NULL) { 473 warn("mdconfig (attach) fdopen error"); 474 ret = NULL; 475 goto err; 476 } 477 p = fgetln(sfd, &linelen); 478 if (p == NULL || 479 (linelen < 2 || linelen > sizeof(linebuf))) { 480 warn("mdconfig (attach) unexpected output"); 481 ret = NULL; 482 goto err; 483 } 484 strlcpy(linebuf, p, linelen); 485 errno = 0; 486 ul = strtoul(linebuf, &p, 10); 487 if (errno == 0) { 488 if (*p != '\0' || ul > INT_MAX) 489 errno = EINVAL; 490 } 491 if (errno) { 492 warn("mdconfig (attach) unexpected output: %s", 493 linebuf); 494 ret = NULL; 495 goto err; 496 } 497 mdunit = (int)ul; 498 } else { 499 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 500 _PATH_MDCONFIG, vnodefile, mdunit); 501 if (error == 0) { 502 /* md device found. Ignore it. */ 503 close(fd); 504 if (qflag == 0) 505 warnx("md%d on %s: Device already " 506 "in use", mdunit, vnodefile); 507 free(vnodefile); 508 return (NULL); 509 } 510 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s", 511 _PATH_MDCONFIG, mdunit, vnodefile); 512 if (error) { 513 warnx("mdconfig (attach) error: " 514 "md%d on file=%s", mdunit, vnodefile); 515 free(vnodefile); 516 return (NULL); 517 } 518 } 519 } else /* SWAPOFF */ { 520 if (mdunit == -1) { 521 error = run_cmd(&fd, "%s -l -n -f %s", 522 _PATH_MDCONFIG, vnodefile); 523 if (error) { 524 /* md device not found. Ignore it. */ 525 close(fd); 526 if (!qflag) 527 warnx("md on %s: Device not found", 528 vnodefile); 529 free(vnodefile); 530 return (NULL); 531 } 532 sfd = fdopen(fd, "r"); 533 if (sfd == NULL) { 534 warn("mdconfig (list) fdopen error"); 535 ret = NULL; 536 goto err; 537 } 538 p = fgetln(sfd, &linelen); 539 if (p == NULL || 540 (linelen < 2 || linelen > sizeof(linebuf))) { 541 warn("mdconfig (list) unexpected output"); 542 ret = NULL; 543 goto err; 544 } 545 strlcpy(linebuf, p, linelen); 546 p = strchr(linebuf, ' '); 547 if (p != NULL) 548 *p = '\0'; 549 errno = 0; 550 ul = strtoul(linebuf, &p, 10); 551 if (errno == 0) { 552 if (*p != '\0' || ul > INT_MAX) 553 errno = EINVAL; 554 } 555 if (errno) { 556 warn("mdconfig (list) unexpected output: %s", 557 linebuf); 558 ret = NULL; 559 goto err; 560 } 561 mdunit = (int)ul; 562 } else { 563 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 564 _PATH_MDCONFIG, vnodefile, mdunit); 565 if (error) { 566 /* md device not found. Ignore it. */ 567 close(fd); 568 if (!qflag) 569 warnx("md%d on %s: Device not found", 570 mdunit, vnodefile); 571 free(vnodefile); 572 return (NULL); 573 } 574 } 575 } 576 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV, 577 MD_NAME, mdunit); 578 mdpath[sizeof(mdpath) - 1] = '\0'; 579 ret = swap_on_off_sfile(mdpath, doingall); 580 581 if (which_prog == SWAPOFF) { 582 if (ret != NULL) { 583 error = run_cmd(NULL, "%s -d -u %d", 584 _PATH_MDCONFIG, mdunit); 585 if (error) 586 warn("mdconfig (detach) detach failed: %s%s%d", 587 _PATH_DEV, MD_NAME, mdunit); 588 } 589 } 590 err: 591 if (sfd != NULL) 592 fclose(sfd); 593 if (fd != -1) 594 close(fd); 595 free(vnodefile); 596 return (ret); 597 } 598 599 static int 600 run_cmd(int *ofd, const char *cmdline, ...) 601 { 602 va_list ap; 603 char **argv, **argvp, *cmd, *p; 604 int argc, pid, status, rv; 605 int pfd[2], nfd, dup2dn; 606 607 va_start(ap, cmdline); 608 rv = vasprintf(&cmd, cmdline, ap); 609 if (rv == -1) { 610 warn("%s", __func__); 611 va_end(ap); 612 return (rv); 613 } 614 va_end(ap); 615 616 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 617 argc++; 618 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 619 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 620 if (**argvp != '\0' && (++argvp > &argv[argc])) { 621 *argvp = NULL; 622 break; 623 } 624 /* The argv array ends up NULL-terminated here. */ 625 #if 0 626 { 627 int i; 628 629 fprintf(stderr, "DEBUG: running:"); 630 /* Should be equivalent to 'cmd' (before strsep, of course). */ 631 for (i = 0; argv[i] != NULL; i++) 632 fprintf(stderr, " %s", argv[i]); 633 fprintf(stderr, "\n"); 634 } 635 #endif 636 dup2dn = 1; 637 if (ofd != NULL) { 638 if (pipe(&pfd[0]) == -1) { 639 warn("%s: pipe", __func__); 640 return (-1); 641 } 642 *ofd = pfd[0]; 643 dup2dn = 0; 644 } 645 pid = fork(); 646 switch (pid) { 647 case 0: 648 /* Child process. */ 649 if (ofd != NULL) 650 if (dup2(pfd[1], STDOUT_FILENO) < 0) 651 err(1, "dup2 in %s", __func__); 652 nfd = open(_PATH_DEVNULL, O_RDWR); 653 if (nfd == -1) 654 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 655 if (dup2(nfd, STDIN_FILENO) < 0) 656 err(1, "%s: dup2", __func__); 657 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 658 err(1, "%s: dup2", __func__); 659 if (dup2(nfd, STDERR_FILENO) < 0) 660 err(1, "%s: dup2", __func__); 661 execv(argv[0], argv); 662 warn("exec: %s", argv[0]); 663 _exit(-1); 664 case -1: 665 err(1, "%s: fork", __func__); 666 } 667 free(cmd); 668 free(argv); 669 while (waitpid(pid, &status, 0) != pid) 670 ; 671 return (WEXITSTATUS(status)); 672 } 673 674 static int 675 swapon_trim(const char *name) 676 { 677 struct stat sb; 678 off_t ioarg[2], sz; 679 int error, fd; 680 681 /* Open a descriptor to create a consumer of the device. */ 682 fd = open(name, O_WRONLY); 683 if (fd < 0) 684 errx(1, "Cannot open %s", name); 685 /* Find the device size. */ 686 if (fstat(fd, &sb) < 0) 687 errx(1, "Cannot stat %s", name); 688 if (S_ISREG(sb.st_mode)) 689 sz = sb.st_size; 690 else if (S_ISCHR(sb.st_mode)) { 691 if (ioctl(fd, DIOCGMEDIASIZE, &sz) != 0) 692 err(1, "ioctl(DIOCGMEDIASIZE)"); 693 } else 694 errx(1, "%s has an invalid file type", name); 695 /* Trim the device. */ 696 ioarg[0] = BBSIZE; 697 ioarg[1] = sz - BBSIZE; 698 if (ioctl(fd, DIOCGDELETE, ioarg) != 0) 699 warn("ioctl(DIOCGDELETE)"); 700 701 /* Start using the device for swapping, creating a second consumer. */ 702 error = swapon(name); 703 704 /* 705 * Do not close the device until the swap pager has attempted to create 706 * another consumer. For GELI devices created with the 'detach -l' 707 * option, removing the last consumer causes the device to be detached 708 * - that is, to disappear. This ordering ensures that the device will 709 * not be detached until swapoff is called. 710 */ 711 close(fd); 712 return (error); 713 } 714 715 static const char * 716 swap_on_off_sfile(const char *name, int doingall) 717 { 718 int error; 719 720 if (which_prog == SWAPON) 721 error = Eflag ? swapon_trim(name) : swapon(name); 722 else /* SWAPOFF */ 723 error = swapoff(name, fflag ? SWAPOFF_FORCE : 0); 724 725 if (error == -1) { 726 switch (errno) { 727 case EBUSY: 728 if (doingall == 0) 729 warnx("%s: Device already in use", name); 730 break; 731 case EINVAL: 732 if (which_prog == SWAPON) 733 warnx("%s: NSWAPDEV limit reached", name); 734 else if (doingall == 0) 735 warn("%s", name); 736 break; 737 default: 738 warn("%s", name); 739 break; 740 } 741 return (NULL); 742 } 743 return (name); 744 } 745 746 static void 747 usage(void) 748 { 749 750 fprintf(stderr, "usage: %s ", getprogname()); 751 switch(orig_prog) { 752 case SWAPON: 753 fprintf(stderr, "[-F fstab] -aLq | [-E] file ...\n"); 754 break; 755 case SWAPOFF: 756 fprintf(stderr, "[-F fstab] -afLq | file ...\n"); 757 break; 758 case SWAPCTL: 759 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 760 break; 761 } 762 exit(1); 763 } 764 765 static void 766 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 767 long blocksize) 768 { 769 char tmp[16]; 770 771 if (hflag == 'H') { 772 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 773 HN_B | HN_NOSPACE | HN_DECIMAL); 774 snprintf(buf, bufsize, "%*s", hlen, tmp); 775 } else 776 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 777 } 778 779 static void 780 swaplist(int lflag, int sflag, int hflag) 781 { 782 size_t mibsize, size; 783 struct xswdev xsw; 784 int hlen, mib[16], n, pagesize; 785 long blocksize; 786 long long total = 0; 787 long long used = 0; 788 long long tmp_total; 789 long long tmp_used; 790 char buf[32]; 791 792 pagesize = getpagesize(); 793 switch(hflag) { 794 case 'G': 795 blocksize = 1024 * 1024 * 1024; 796 strlcpy(buf, "1GB-blocks", sizeof(buf)); 797 hlen = 10; 798 break; 799 case 'H': 800 blocksize = -1; 801 strlcpy(buf, "Bytes", sizeof(buf)); 802 hlen = 10; 803 break; 804 case 'K': 805 blocksize = 1024; 806 strlcpy(buf, "1kB-blocks", sizeof(buf)); 807 hlen = 10; 808 break; 809 case 'M': 810 blocksize = 1024 * 1024; 811 strlcpy(buf, "1MB-blocks", sizeof(buf)); 812 hlen = 10; 813 break; 814 default: 815 getbsize(&hlen, &blocksize); 816 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 817 break; 818 } 819 820 mibsize = nitems(mib); 821 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 822 err(1, "sysctlnametomib()"); 823 824 if (lflag) { 825 printf("%-13s %*s %*s\n", 826 "Device:", 827 hlen, buf, 828 hlen, "Used:"); 829 } 830 831 for (n = 0; ; ++n) { 832 mib[mibsize] = n; 833 size = sizeof xsw; 834 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1) 835 break; 836 if (xsw.xsw_version != XSWDEV_VERSION) 837 errx(1, "xswdev version mismatch"); 838 839 tmp_total = (long long)xsw.xsw_nblks * pagesize; 840 tmp_used = (long long)xsw.xsw_used * pagesize; 841 total += tmp_total; 842 used += tmp_used; 843 if (lflag) { 844 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 845 blocksize); 846 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR), 847 buf); 848 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 849 blocksize); 850 printf("%s\n", buf); 851 } 852 } 853 if (errno != ENOENT) 854 err(1, "sysctl()"); 855 856 if (sflag) { 857 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 858 printf("Total: %s ", buf); 859 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 860 printf("%s\n", buf); 861 } 862 } 863 864