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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if 0 31 #ifndef lint 32 static const char copyright[] = 33 "@(#) Copyright (c) 1980, 1993\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35 #endif /* not lint */ 36 37 #ifndef lint 38 static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93"; 39 #endif /* not lint */ 40 #endif 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/types.h> 46 #include <sys/mdioctl.h> 47 #include <sys/stat.h> 48 #include <sys/sysctl.h> 49 #include <sys/wait.h> 50 #include <vm/vm_param.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <fnmatch.h> 56 #include <fstab.h> 57 #include <libgen.h> 58 #include <libutil.h> 59 #include <limits.h> 60 #include <paths.h> 61 #include <stdarg.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 static void usage(void); 68 static const char *swap_on_off(const char *, int, char *); 69 static const char *swap_on_off_gbde(const char *, int); 70 static const char *swap_on_off_geli(const char *, char *, int); 71 static const char *swap_on_off_md(const char *, char *, int); 72 static const char *swap_on_off_sfile(const char *, int); 73 static void swaplist(int, int, int); 74 static int run_cmd(int *, const char *, ...) __printflike(2, 3); 75 76 static enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; 77 78 static int qflag; 79 80 int 81 main(int argc, char **argv) 82 { 83 struct fstab *fsp; 84 const char *swfile; 85 char *ptr; 86 int ret; 87 int ch, doall; 88 int sflag = 0, lflag = 0, late = 0, hflag = 0; 89 const char *etc_fstab; 90 91 if ((ptr = strrchr(argv[0], '/')) == NULL) 92 ptr = argv[0]; 93 if (strstr(ptr, "swapon")) 94 which_prog = SWAPON; 95 else if (strstr(ptr, "swapoff")) 96 which_prog = SWAPOFF; 97 orig_prog = which_prog; 98 99 doall = 0; 100 etc_fstab = NULL; 101 while ((ch = getopt(argc, argv, "AadghklLmqsUF:")) != -1) { 102 switch(ch) { 103 case 'A': 104 if (which_prog == SWAPCTL) { 105 doall = 1; 106 which_prog = SWAPON; 107 } else { 108 usage(); 109 } 110 break; 111 case 'a': 112 if (which_prog == SWAPON || which_prog == SWAPOFF) 113 doall = 1; 114 else 115 which_prog = SWAPON; 116 break; 117 case 'd': 118 if (which_prog == SWAPCTL) 119 which_prog = SWAPOFF; 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 } 155 break; 156 case 'F': 157 etc_fstab = optarg; 158 break; 159 case '?': 160 default: 161 usage(); 162 } 163 } 164 argv += optind; 165 166 ret = 0; 167 swfile = NULL; 168 if (etc_fstab != NULL) 169 setfstab(etc_fstab); 170 if (which_prog == SWAPON || which_prog == SWAPOFF) { 171 if (doall) { 172 while ((fsp = getfsent()) != NULL) { 173 if (strcmp(fsp->fs_type, FSTAB_SW)) 174 continue; 175 if (strstr(fsp->fs_mntops, "noauto")) 176 continue; 177 if (which_prog != SWAPOFF && 178 strstr(fsp->fs_mntops, "late") && 179 !late) 180 continue; 181 swfile = swap_on_off(fsp->fs_spec, 1, 182 fsp->fs_mntops); 183 if (swfile == NULL) { 184 ret = 1; 185 continue; 186 } 187 if (!qflag) { 188 printf("%s: %sing %s as swap device\n", 189 getprogname(), 190 (which_prog == SWAPOFF) ? 191 "remov" : "add", swfile); 192 } 193 } 194 } 195 else if (!*argv) 196 usage(); 197 for (; *argv; ++argv) { 198 swfile = swap_on_off(*argv, 0, NULL); 199 if (swfile == NULL) { 200 ret = 1; 201 continue; 202 } 203 if (orig_prog == SWAPCTL) { 204 printf("%s: %sing %s as swap device\n", 205 getprogname(), 206 (which_prog == SWAPOFF) ? "remov" : "add", 207 swfile); 208 } 209 } 210 } else { 211 if (lflag || sflag) 212 swaplist(lflag, sflag, hflag); 213 else 214 usage(); 215 } 216 exit(ret); 217 } 218 219 static const char * 220 swap_on_off(const char *name, int doingall, char *mntops) 221 { 222 char base[PATH_MAX]; 223 224 /* Swap on vnode-backed md(4) device. */ 225 if (mntops != NULL && 226 (fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 || 227 fnmatch(MD_NAME "[0-9]*", name, 0) == 0 || 228 strncmp(_PATH_DEV MD_NAME, name, 229 sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 || 230 strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0)) 231 return (swap_on_off_md(name, mntops, doingall)); 232 233 basename_r(name, base); 234 235 /* Swap on encrypted device by GEOM_BDE. */ 236 if (fnmatch("*.bde", base, 0) == 0) 237 return (swap_on_off_gbde(name, doingall)); 238 239 /* Swap on encrypted device by GEOM_ELI. */ 240 if (fnmatch("*.eli", base, 0) == 0) 241 return (swap_on_off_geli(name, mntops, doingall)); 242 243 /* Swap on special file. */ 244 return (swap_on_off_sfile(name, doingall)); 245 } 246 247 /* Strip off .bde or .eli suffix from swap device name */ 248 static char * 249 swap_basename(const char *name) 250 { 251 char *dname, *p; 252 253 dname = strdup(name); 254 p = strrchr(dname, '.'); 255 /* assert(p != NULL); */ 256 *p = '\0'; 257 258 return (dname); 259 } 260 261 static const char * 262 swap_on_off_gbde(const char *name, int doingall) 263 { 264 const char *ret; 265 char pass[64 * 2 + 1], bpass[64]; 266 char *dname; 267 int i, error; 268 269 dname = swap_basename(name); 270 if (dname == NULL) 271 return (NULL); 272 273 if (which_prog == SWAPON) { 274 arc4random_buf(bpass, sizeof(bpass)); 275 for (i = 0; i < (int)sizeof(bpass); i++) 276 sprintf(&pass[2 * i], "%02x", bpass[i]); 277 pass[sizeof(pass) - 1] = '\0'; 278 279 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE, 280 dname, pass); 281 if (error) { 282 /* bde device found. Ignore it. */ 283 free(dname); 284 if (!qflag) 285 warnx("%s: Device already in use", name); 286 return (NULL); 287 } 288 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE, 289 dname, pass); 290 free(dname); 291 if (error) { 292 warnx("gbde (attach) error: %s", name); 293 return (NULL); 294 } 295 } 296 297 ret = swap_on_off_sfile(name, doingall); 298 299 if (which_prog == SWAPOFF) { 300 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname); 301 free(dname); 302 if (error) { 303 /* bde device not found. Ignore it. */ 304 if (!qflag) 305 warnx("%s: Device not found", name); 306 return (NULL); 307 } 308 } 309 310 return (ret); 311 } 312 313 /* Build geli(8) arguments from mntops */ 314 static char * 315 swap_on_geli_args(const char *mntops) 316 { 317 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 318 const char *aflag, *eflag, *lflag, *sflag; 319 char *p; 320 char *args; 321 char *token, *string, *ops; 322 int argsize, pagesize; 323 size_t pagesize_len; 324 u_long ul; 325 326 /* Use built-in defaults for geli(8) */ 327 aalgo = ealgo = keylen_str = ""; 328 aflag = eflag = lflag = ""; 329 330 /* We will always specify sectorsize */ 331 sflag = " -s "; 332 sectorsize_str = NULL; 333 334 if (mntops != NULL) { 335 string = ops = strdup(mntops); 336 337 while ((token = strsep(&string, ",")) != NULL) { 338 if ((p = strstr(token, "aalgo=")) == token) { 339 aalgo = p + sizeof("aalgo=") - 1; 340 aflag = " -a "; 341 } else if ((p = strstr(token, "ealgo=")) == token) { 342 ealgo = p + sizeof("ealgo=") - 1; 343 eflag = " -e "; 344 } else if ((p = strstr(token, "keylen=")) == token) { 345 keylen_str = p + sizeof("keylen=") - 1; 346 errno = 0; 347 ul = strtoul(keylen_str, &p, 10); 348 if (errno == 0) { 349 if (*p != '\0' || ul > INT_MAX) 350 errno = EINVAL; 351 } 352 if (errno) { 353 warn("Invalid keylen: %s", keylen_str); 354 free(ops); 355 return (NULL); 356 } 357 lflag = " -l "; 358 } else if ((p = strstr(token, "sectorsize=")) == token) { 359 sectorsize_str = p + sizeof("sectorsize=") - 1; 360 errno = 0; 361 ul = strtoul(sectorsize_str, &p, 10); 362 if (errno == 0) { 363 if (*p != '\0' || ul > INT_MAX) 364 errno = EINVAL; 365 } 366 if (errno) { 367 warn("Invalid sectorsize: %s", sectorsize_str); 368 free(ops); 369 return (NULL); 370 } 371 } else if (strcmp(token, "sw") != 0) { 372 warnx("Invalid option: %s", token); 373 free(ops); 374 return (NULL); 375 } 376 } 377 } else 378 ops = NULL; 379 380 /* 381 * If we do not have a sector size at this point, fill in 382 * pagesize as sector size. 383 */ 384 if (sectorsize_str == NULL) { 385 /* Use pagesize as default sectorsize */ 386 pagesize = getpagesize(); 387 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 388 p = alloca(pagesize_len); 389 snprintf(p, pagesize_len, "%d", pagesize); 390 sectorsize_str = p; 391 } 392 393 argsize = asprintf(&args, "%s%s%s%s%s%s%s%s -d", 394 aflag, aalgo, eflag, ealgo, lflag, keylen_str, 395 sflag, sectorsize_str); 396 397 free(ops); 398 return (args); 399 } 400 401 static const char * 402 swap_on_off_geli(const char *name, char *mntops, int doingall) 403 { 404 char *dname; 405 char *args; 406 struct stat sb; 407 int error; 408 409 error = stat(name, &sb); 410 411 if (which_prog == SWAPON) do { 412 /* Skip if the .eli device already exists */ 413 if (error == 0) 414 break; 415 416 args = swap_on_geli_args(mntops); 417 if (args == NULL) 418 return (NULL); 419 420 dname = swap_basename(name); 421 if (dname == NULL) { 422 free(args); 423 return (NULL); 424 } 425 426 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args, 427 dname); 428 429 free(dname); 430 free(args); 431 432 if (error) { 433 /* error occured during creation */ 434 if (!qflag) 435 warnx("%s: Invalid parameters", name); 436 return (NULL); 437 } 438 } while (0); 439 440 return (swap_on_off_sfile(name, doingall)); 441 } 442 443 static const char * 444 swap_on_off_md(const char *name, char *mntops, int doingall) 445 { 446 FILE *sfd; 447 int fd, mdunit, error; 448 const char *ret; 449 char mdpath[PATH_MAX], linebuf[PATH_MAX]; 450 char *p, *vnodefile; 451 size_t linelen; 452 u_long ul; 453 454 fd = -1; 455 sfd = NULL; 456 if (strlen(name) == (sizeof(MD_NAME) - 1)) 457 mdunit = -1; 458 else { 459 errno = 0; 460 ul = strtoul(name + 2, &p, 10); 461 if (errno == 0) { 462 if (*p != '\0' || ul > INT_MAX) 463 errno = EINVAL; 464 } 465 if (errno) { 466 warn("Bad device unit: %s", name); 467 return (NULL); 468 } 469 mdunit = (int)ul; 470 } 471 472 vnodefile = NULL; 473 if ((p = strstr(mntops, "file=")) != NULL) { 474 vnodefile = strdup(p + sizeof("file=") - 1); 475 p = strchr(vnodefile, ','); 476 if (p != NULL) 477 *p = '\0'; 478 } 479 if (vnodefile == NULL) { 480 warnx("file option not found for %s", name); 481 return (NULL); 482 } 483 484 if (which_prog == SWAPON) { 485 if (mdunit == -1) { 486 error = run_cmd(&fd, "%s -l -n -f %s", 487 _PATH_MDCONFIG, vnodefile); 488 if (error == 0) { 489 /* md device found. Ignore it. */ 490 close(fd); 491 if (!qflag) 492 warnx("%s: Device already in use", 493 vnodefile); 494 free(vnodefile); 495 return (NULL); 496 } 497 error = run_cmd(&fd, "%s -a -t vnode -n -f %s", 498 _PATH_MDCONFIG, vnodefile); 499 if (error) { 500 warnx("mdconfig (attach) error: file=%s", 501 vnodefile); 502 free(vnodefile); 503 return (NULL); 504 } 505 sfd = fdopen(fd, "r"); 506 if (sfd == NULL) { 507 warn("mdconfig (attach) fdopen error"); 508 ret = NULL; 509 goto err; 510 } 511 p = fgetln(sfd, &linelen); 512 if (p == NULL && 513 (linelen < 2 || linelen > sizeof(linebuf))) { 514 warn("mdconfig (attach) unexpected output"); 515 ret = NULL; 516 goto err; 517 } 518 strncpy(linebuf, p, linelen); 519 linebuf[linelen - 1] = '\0'; 520 errno = 0; 521 ul = strtoul(linebuf, &p, 10); 522 if (errno == 0) { 523 if (*p != '\0' || ul > INT_MAX) 524 errno = EINVAL; 525 } 526 if (errno) { 527 warn("mdconfig (attach) unexpected output: %s", 528 linebuf); 529 ret = NULL; 530 goto err; 531 } 532 mdunit = (int)ul; 533 } else { 534 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 535 _PATH_MDCONFIG, vnodefile, mdunit); 536 if (error == 0) { 537 /* md device found. Ignore it. */ 538 close(fd); 539 if (!qflag) 540 warnx("md%d on %s: Device already " 541 "in use", mdunit, vnodefile); 542 free(vnodefile); 543 return (NULL); 544 } 545 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s", 546 _PATH_MDCONFIG, mdunit, vnodefile); 547 if (error) { 548 warnx("mdconfig (attach) error: " 549 "md%d on file=%s", mdunit, vnodefile); 550 free(vnodefile); 551 return (NULL); 552 } 553 } 554 } else /* SWAPOFF */ { 555 if (mdunit == -1) { 556 error = run_cmd(&fd, "%s -l -n -f %s", 557 _PATH_MDCONFIG, vnodefile); 558 if (error) { 559 /* md device not found. Ignore it. */ 560 close(fd); 561 if (!qflag) 562 warnx("md on %s: Device not found", 563 vnodefile); 564 free(vnodefile); 565 return (NULL); 566 } 567 sfd = fdopen(fd, "r"); 568 if (sfd == NULL) { 569 warn("mdconfig (list) fdopen error"); 570 ret = NULL; 571 goto err; 572 } 573 p = fgetln(sfd, &linelen); 574 if (p == NULL && 575 (linelen < 2 || linelen > sizeof(linebuf) - 1)) { 576 warn("mdconfig (list) unexpected output"); 577 ret = NULL; 578 goto err; 579 } 580 strncpy(linebuf, p, linelen); 581 linebuf[linelen - 1] = '\0'; 582 p = strchr(linebuf, ' '); 583 if (p != NULL) 584 *p = '\0'; 585 errno = 0; 586 ul = strtoul(linebuf, &p, 10); 587 if (errno == 0) { 588 if (*p != '\0' || ul > INT_MAX) 589 errno = EINVAL; 590 } 591 if (errno) { 592 warn("mdconfig (list) unexpected output: %s", 593 linebuf); 594 ret = NULL; 595 goto err; 596 } 597 mdunit = (int)ul; 598 } else { 599 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 600 _PATH_MDCONFIG, vnodefile, mdunit); 601 if (error) { 602 /* md device not found. Ignore it. */ 603 close(fd); 604 if (!qflag) 605 warnx("md%d on %s: Device not found", 606 mdunit, vnodefile); 607 free(vnodefile); 608 return (NULL); 609 } 610 } 611 } 612 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV, 613 MD_NAME, mdunit); 614 mdpath[sizeof(mdpath) - 1] = '\0'; 615 ret = swap_on_off_sfile(mdpath, doingall); 616 617 if (which_prog == SWAPOFF) { 618 if (ret != NULL) { 619 error = run_cmd(NULL, "%s -d -u %d", 620 _PATH_MDCONFIG, mdunit); 621 if (error) 622 warn("mdconfig (detach) detach failed: %s%s%d", 623 _PATH_DEV, MD_NAME, mdunit); 624 } 625 } 626 err: 627 if (sfd != NULL) 628 fclose(sfd); 629 if (fd != -1) 630 close(fd); 631 free(vnodefile); 632 return (ret); 633 } 634 635 static int 636 run_cmd(int *ofd, const char *cmdline, ...) 637 { 638 va_list ap; 639 char **argv, **argvp, *cmd, *p; 640 int argc, pid, status, rv; 641 int pfd[2], nfd, dup2dn; 642 643 va_start(ap, cmdline); 644 rv = vasprintf(&cmd, cmdline, ap); 645 if (rv == -1) { 646 warn("%s", __func__); 647 return (rv); 648 } 649 va_end(ap); 650 651 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 652 argc++; 653 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 654 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 655 if (**argvp != '\0' && (++argvp > &argv[argc])) { 656 *argvp = NULL; 657 break; 658 } 659 /* The argv array ends up NULL-terminated here. */ 660 #if 0 661 { 662 int i; 663 664 fprintf(stderr, "DEBUG: running:"); 665 /* Should be equivalent to 'cmd' (before strsep, of course). */ 666 for (i = 0; argv[i] != NULL; i++) 667 fprintf(stderr, " %s", argv[i]); 668 fprintf(stderr, "\n"); 669 } 670 #endif 671 dup2dn = 1; 672 if (ofd != NULL) { 673 if (pipe(&pfd[0]) == -1) { 674 warn("%s: pipe", __func__); 675 return (-1); 676 } 677 *ofd = pfd[0]; 678 dup2dn = 0; 679 } 680 pid = fork(); 681 switch (pid) { 682 case 0: 683 /* Child process. */ 684 if (ofd != NULL) 685 if (dup2(pfd[1], STDOUT_FILENO) < 0) 686 err(1, "dup2 in %s", __func__); 687 nfd = open(_PATH_DEVNULL, O_RDWR); 688 if (nfd == -1) 689 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 690 if (dup2(nfd, STDIN_FILENO) < 0) 691 err(1, "%s: dup2", __func__); 692 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 693 err(1, "%s: dup2", __func__); 694 if (dup2(nfd, STDERR_FILENO) < 0) 695 err(1, "%s: dup2", __func__); 696 execv(argv[0], argv); 697 warn("exec: %s", argv[0]); 698 _exit(-1); 699 case -1: 700 err(1, "%s: fork", __func__); 701 } 702 free(cmd); 703 free(argv); 704 while (waitpid(pid, &status, 0) != pid) 705 ; 706 return (WEXITSTATUS(status)); 707 } 708 709 static const char * 710 swap_on_off_sfile(const char *name, int doingall) 711 { 712 int error; 713 714 if (which_prog == SWAPON) 715 error = swapon(name); 716 else /* SWAPOFF */ 717 error = swapoff(name); 718 719 if (error == -1) { 720 switch (errno) { 721 case EBUSY: 722 if (!doingall) 723 warnx("%s: Device already in use", name); 724 break; 725 case EINVAL: 726 if (which_prog == SWAPON) 727 warnx("%s: NSWAPDEV limit reached", name); 728 else if (!doingall) 729 warn("%s", name); 730 break; 731 default: 732 warn("%s", name); 733 break; 734 } 735 return (NULL); 736 } 737 return (name); 738 } 739 740 static void 741 usage(void) 742 { 743 fprintf(stderr, "usage: %s ", getprogname()); 744 switch(orig_prog) { 745 case SWAPON: 746 case SWAPOFF: 747 fprintf(stderr, "[-F fstab] -aLq | file ...\n"); 748 break; 749 case SWAPCTL: 750 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 751 break; 752 } 753 exit(1); 754 } 755 756 static void 757 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 758 long blocksize) 759 { 760 761 if (hflag == 'H') { 762 char tmp[16]; 763 764 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 765 HN_B | HN_NOSPACE | HN_DECIMAL); 766 snprintf(buf, bufsize, "%*s", hlen, tmp); 767 } else { 768 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 769 } 770 } 771 772 static void 773 swaplist(int lflag, int sflag, int hflag) 774 { 775 size_t mibsize, size; 776 struct xswdev xsw; 777 int hlen, mib[16], n, pagesize; 778 long blocksize; 779 long long total = 0; 780 long long used = 0; 781 long long tmp_total; 782 long long tmp_used; 783 char buf[32]; 784 785 pagesize = getpagesize(); 786 switch(hflag) { 787 case 'G': 788 blocksize = 1024 * 1024 * 1024; 789 strlcpy(buf, "1GB-blocks", sizeof(buf)); 790 hlen = 10; 791 break; 792 case 'H': 793 blocksize = -1; 794 strlcpy(buf, "Bytes", sizeof(buf)); 795 hlen = 10; 796 break; 797 case 'K': 798 blocksize = 1024; 799 strlcpy(buf, "1kB-blocks", sizeof(buf)); 800 hlen = 10; 801 break; 802 case 'M': 803 blocksize = 1024 * 1024; 804 strlcpy(buf, "1MB-blocks", sizeof(buf)); 805 hlen = 10; 806 break; 807 default: 808 getbsize(&hlen, &blocksize); 809 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 810 break; 811 } 812 813 mibsize = sizeof mib / sizeof mib[0]; 814 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 815 err(1, "sysctlnametomib()"); 816 817 if (lflag) { 818 printf("%-13s %*s %*s\n", 819 "Device:", 820 hlen, buf, 821 hlen, "Used:"); 822 } 823 824 for (n = 0; ; ++n) { 825 mib[mibsize] = n; 826 size = sizeof xsw; 827 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1) 828 break; 829 if (xsw.xsw_version != XSWDEV_VERSION) 830 errx(1, "xswdev version mismatch"); 831 832 tmp_total = (long long)xsw.xsw_nblks * pagesize; 833 tmp_used = (long long)xsw.xsw_used * pagesize; 834 total += tmp_total; 835 used += tmp_used; 836 if (lflag) { 837 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 838 blocksize); 839 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR), 840 buf); 841 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 842 blocksize); 843 printf("%s\n", buf); 844 } 845 } 846 if (errno != ENOENT) 847 err(1, "sysctl()"); 848 849 if (sflag) { 850 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 851 printf("Total: %s ", buf); 852 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 853 printf("%s\n", buf); 854 } 855 } 856 857