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, ch, doall; 87 int sflag, lflag, late, hflag; 88 const char *etc_fstab; 89 90 sflag = lflag = late = hflag = 0; 91 if ((ptr = strrchr(argv[0], '/')) == NULL) 92 ptr = argv[0]; 93 if (strstr(ptr, "swapon") != NULL) 94 which_prog = SWAPON; 95 else if (strstr(ptr, "swapoff") != NULL) 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 break; 110 case 'a': 111 if (which_prog == SWAPON || which_prog == SWAPOFF) 112 doall = 1; 113 else 114 which_prog = SWAPON; 115 break; 116 case 'd': 117 if (which_prog == SWAPCTL) 118 which_prog = SWAPOFF; 119 else 120 usage(); 121 break; 122 case 'g': 123 hflag = 'G'; 124 break; 125 case 'h': 126 hflag = 'H'; 127 break; 128 case 'k': 129 hflag = 'K'; 130 break; 131 case 'l': 132 lflag = 1; 133 break; 134 case 'L': 135 late = 1; 136 break; 137 case 'm': 138 hflag = 'M'; 139 break; 140 case 'q': 141 if (which_prog == SWAPON || which_prog == SWAPOFF) 142 qflag = 1; 143 break; 144 case 's': 145 sflag = 1; 146 break; 147 case 'U': 148 if (which_prog == SWAPCTL) { 149 doall = 1; 150 which_prog = SWAPOFF; 151 } else 152 usage(); 153 break; 154 case 'F': 155 etc_fstab = optarg; 156 break; 157 case '?': 158 default: 159 usage(); 160 } 161 } 162 argv += optind; 163 164 ret = 0; 165 swfile = NULL; 166 if (etc_fstab != NULL) 167 setfstab(etc_fstab); 168 if (which_prog == SWAPON || which_prog == SWAPOFF) { 169 if (doall) { 170 while ((fsp = getfsent()) != NULL) { 171 if (strcmp(fsp->fs_type, FSTAB_SW) != 0) 172 continue; 173 if (strstr(fsp->fs_mntops, "noauto") != NULL) 174 continue; 175 if (which_prog != SWAPOFF && 176 strstr(fsp->fs_mntops, "late") && 177 late == 0) 178 continue; 179 swfile = swap_on_off(fsp->fs_spec, 1, 180 fsp->fs_mntops); 181 if (swfile == NULL) { 182 ret = 1; 183 continue; 184 } 185 if (qflag == 0) { 186 printf("%s: %sing %s as swap device\n", 187 getprogname(), 188 (which_prog == SWAPOFF) ? 189 "remov" : "add", swfile); 190 } 191 } 192 } else if (*argv == NULL) 193 usage(); 194 for (; *argv; ++argv) { 195 swfile = swap_on_off(*argv, 0, NULL); 196 if (swfile == NULL) { 197 ret = 1; 198 continue; 199 } 200 if (orig_prog == SWAPCTL) { 201 printf("%s: %sing %s as swap device\n", 202 getprogname(), 203 (which_prog == SWAPOFF) ? "remov" : "add", 204 swfile); 205 } 206 } 207 } else { 208 if (lflag || sflag) 209 swaplist(lflag, sflag, hflag); 210 else 211 usage(); 212 } 213 exit(ret); 214 } 215 216 static const char * 217 swap_on_off(const char *name, int doingall, char *mntops) 218 { 219 char base[PATH_MAX]; 220 221 /* Swap on vnode-backed md(4) device. */ 222 if (mntops != NULL && 223 (fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 || 224 fnmatch(MD_NAME "[0-9]*", name, 0) == 0 || 225 strncmp(_PATH_DEV MD_NAME, name, 226 sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 || 227 strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0)) 228 return (swap_on_off_md(name, mntops, doingall)); 229 230 basename_r(name, base); 231 232 /* Swap on encrypted device by GEOM_BDE. */ 233 if (fnmatch("*.bde", base, 0) == 0) 234 return (swap_on_off_gbde(name, doingall)); 235 236 /* Swap on encrypted device by GEOM_ELI. */ 237 if (fnmatch("*.eli", base, 0) == 0) 238 return (swap_on_off_geli(name, mntops, doingall)); 239 240 /* Swap on special file. */ 241 return (swap_on_off_sfile(name, doingall)); 242 } 243 244 /* Strip off .bde or .eli suffix from swap device name */ 245 static char * 246 swap_basename(const char *name) 247 { 248 char *dname, *p; 249 250 dname = strdup(name); 251 p = strrchr(dname, '.'); 252 /* assert(p != NULL); */ 253 *p = '\0'; 254 255 return (dname); 256 } 257 258 static const char * 259 swap_on_off_gbde(const char *name, int doingall) 260 { 261 const char *ret; 262 char pass[64 * 2 + 1]; 263 unsigned char bpass[64]; 264 char *dname; 265 int i, error; 266 267 dname = swap_basename(name); 268 if (dname == NULL) 269 return (NULL); 270 271 if (which_prog == SWAPON) { 272 arc4random_buf(bpass, sizeof(bpass)); 273 for (i = 0; i < (int)sizeof(bpass); i++) 274 sprintf(&pass[2 * i], "%02x", bpass[i]); 275 pass[sizeof(pass) - 1] = '\0'; 276 277 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE, 278 dname, pass); 279 if (error) { 280 /* bde device found. Ignore it. */ 281 free(dname); 282 if (qflag == 0) 283 warnx("%s: Device already in use", name); 284 return (NULL); 285 } 286 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE, 287 dname, pass); 288 free(dname); 289 if (error) { 290 warnx("gbde (attach) error: %s", name); 291 return (NULL); 292 } 293 } 294 295 ret = swap_on_off_sfile(name, doingall); 296 297 if (which_prog == SWAPOFF) { 298 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname); 299 free(dname); 300 if (error) { 301 /* bde device not found. Ignore it. */ 302 if (qflag == 0) 303 warnx("%s: Device not found", name); 304 return (NULL); 305 } 306 } 307 308 return (ret); 309 } 310 311 /* Build geli(8) arguments from mntops */ 312 static char * 313 swap_on_geli_args(const char *mntops) 314 { 315 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 316 const char *aflag, *eflag, *lflag, *sflag; 317 char *p, *args, *token, *string, *ops; 318 int argsize, pagesize; 319 size_t pagesize_len; 320 u_long ul; 321 322 /* Use built-in defaults for geli(8). */ 323 aalgo = ealgo = keylen_str = ""; 324 aflag = eflag = lflag = ""; 325 326 /* We will always specify sectorsize. */ 327 sflag = " -s "; 328 sectorsize_str = NULL; 329 330 if (mntops != NULL) { 331 string = ops = strdup(mntops); 332 333 while ((token = strsep(&string, ",")) != NULL) { 334 if ((p = strstr(token, "aalgo=")) == token) { 335 aalgo = p + sizeof("aalgo=") - 1; 336 aflag = " -a "; 337 } else if ((p = strstr(token, "ealgo=")) == token) { 338 ealgo = p + sizeof("ealgo=") - 1; 339 eflag = " -e "; 340 } else if ((p = strstr(token, "keylen=")) == token) { 341 keylen_str = p + sizeof("keylen=") - 1; 342 errno = 0; 343 ul = strtoul(keylen_str, &p, 10); 344 if (errno == 0) { 345 if (*p != '\0' || ul > INT_MAX) 346 errno = EINVAL; 347 } 348 if (errno) { 349 warn("Invalid keylen: %s", keylen_str); 350 free(ops); 351 return (NULL); 352 } 353 lflag = " -l "; 354 } else if ((p = strstr(token, "sectorsize=")) == token) { 355 sectorsize_str = p + sizeof("sectorsize=") - 1; 356 errno = 0; 357 ul = strtoul(sectorsize_str, &p, 10); 358 if (errno == 0) { 359 if (*p != '\0' || ul > INT_MAX) 360 errno = EINVAL; 361 } 362 if (errno) { 363 warn("Invalid sectorsize: %s", 364 sectorsize_str); 365 free(ops); 366 return (NULL); 367 } 368 } else if (strcmp(token, "sw") != 0) { 369 warnx("Invalid option: %s", token); 370 free(ops); 371 return (NULL); 372 } 373 } 374 } else 375 ops = NULL; 376 377 /* 378 * If we do not have a sector size at this point, fill in 379 * pagesize as sector size. 380 */ 381 if (sectorsize_str == NULL) { 382 /* Use pagesize as default sectorsize. */ 383 pagesize = getpagesize(); 384 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 385 p = alloca(pagesize_len); 386 snprintf(p, pagesize_len, "%d", pagesize); 387 sectorsize_str = p; 388 } 389 390 argsize = asprintf(&args, "%s%s%s%s%s%s%s%s -d", 391 aflag, aalgo, eflag, ealgo, lflag, keylen_str, 392 sflag, sectorsize_str); 393 394 free(ops); 395 return (args); 396 } 397 398 static const char * 399 swap_on_off_geli(const char *name, char *mntops, int doingall) 400 { 401 struct stat sb; 402 char *dname, *args; 403 int error; 404 405 error = stat(name, &sb); 406 407 if (which_prog == SWAPON) do { 408 /* Skip if the .eli device already exists. */ 409 if (error == 0) 410 break; 411 412 args = swap_on_geli_args(mntops); 413 if (args == NULL) 414 return (NULL); 415 416 dname = swap_basename(name); 417 if (dname == NULL) { 418 free(args); 419 return (NULL); 420 } 421 422 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args, 423 dname); 424 425 free(dname); 426 free(args); 427 428 if (error) { 429 /* error occured during creation. */ 430 if (qflag == 0) 431 warnx("%s: Invalid parameters", name); 432 return (NULL); 433 } 434 } while (0); 435 436 return (swap_on_off_sfile(name, doingall)); 437 } 438 439 static const char * 440 swap_on_off_md(const char *name, char *mntops, int doingall) 441 { 442 FILE *sfd; 443 int fd, mdunit, error; 444 const char *ret; 445 static char mdpath[PATH_MAX], linebuf[PATH_MAX]; 446 char *p, *vnodefile; 447 size_t linelen; 448 u_long ul; 449 450 fd = -1; 451 sfd = NULL; 452 if (strlen(name) == (sizeof(MD_NAME) - 1)) 453 mdunit = -1; 454 else { 455 errno = 0; 456 ul = strtoul(name + 2, &p, 10); 457 if (errno == 0) { 458 if (*p != '\0' || ul > INT_MAX) 459 errno = EINVAL; 460 } 461 if (errno) { 462 warn("Bad device unit: %s", name); 463 return (NULL); 464 } 465 mdunit = (int)ul; 466 } 467 468 vnodefile = NULL; 469 if ((p = strstr(mntops, "file=")) != NULL) { 470 vnodefile = strdup(p + sizeof("file=") - 1); 471 p = strchr(vnodefile, ','); 472 if (p != NULL) 473 *p = '\0'; 474 } 475 if (vnodefile == NULL) { 476 warnx("file option not found for %s", name); 477 return (NULL); 478 } 479 480 if (which_prog == SWAPON) { 481 if (mdunit == -1) { 482 error = run_cmd(&fd, "%s -l -n -f %s", 483 _PATH_MDCONFIG, vnodefile); 484 if (error == 0) { 485 /* md device found. Ignore it. */ 486 close(fd); 487 if (!qflag) 488 warnx("%s: Device already in use", 489 vnodefile); 490 free(vnodefile); 491 return (NULL); 492 } 493 error = run_cmd(&fd, "%s -a -t vnode -n -f %s", 494 _PATH_MDCONFIG, vnodefile); 495 if (error) { 496 warnx("mdconfig (attach) error: file=%s", 497 vnodefile); 498 free(vnodefile); 499 return (NULL); 500 } 501 sfd = fdopen(fd, "r"); 502 if (sfd == NULL) { 503 warn("mdconfig (attach) fdopen error"); 504 ret = NULL; 505 goto err; 506 } 507 p = fgetln(sfd, &linelen); 508 if (p == NULL && 509 (linelen < 2 || linelen > sizeof(linebuf))) { 510 warn("mdconfig (attach) unexpected output"); 511 ret = NULL; 512 goto err; 513 } 514 strncpy(linebuf, p, linelen); 515 linebuf[linelen - 1] = '\0'; 516 errno = 0; 517 ul = strtoul(linebuf, &p, 10); 518 if (errno == 0) { 519 if (*p != '\0' || ul > INT_MAX) 520 errno = EINVAL; 521 } 522 if (errno) { 523 warn("mdconfig (attach) unexpected output: %s", 524 linebuf); 525 ret = NULL; 526 goto err; 527 } 528 mdunit = (int)ul; 529 } else { 530 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 531 _PATH_MDCONFIG, vnodefile, mdunit); 532 if (error == 0) { 533 /* md device found. Ignore it. */ 534 close(fd); 535 if (qflag == 0) 536 warnx("md%d on %s: Device already " 537 "in use", mdunit, vnodefile); 538 free(vnodefile); 539 return (NULL); 540 } 541 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s", 542 _PATH_MDCONFIG, mdunit, vnodefile); 543 if (error) { 544 warnx("mdconfig (attach) error: " 545 "md%d on file=%s", mdunit, vnodefile); 546 free(vnodefile); 547 return (NULL); 548 } 549 } 550 } else /* SWAPOFF */ { 551 if (mdunit == -1) { 552 error = run_cmd(&fd, "%s -l -n -f %s", 553 _PATH_MDCONFIG, vnodefile); 554 if (error) { 555 /* md device not found. Ignore it. */ 556 close(fd); 557 if (!qflag) 558 warnx("md on %s: Device not found", 559 vnodefile); 560 free(vnodefile); 561 return (NULL); 562 } 563 sfd = fdopen(fd, "r"); 564 if (sfd == NULL) { 565 warn("mdconfig (list) fdopen error"); 566 ret = NULL; 567 goto err; 568 } 569 p = fgetln(sfd, &linelen); 570 if (p == NULL && 571 (linelen < 2 || linelen > sizeof(linebuf) - 1)) { 572 warn("mdconfig (list) unexpected output"); 573 ret = NULL; 574 goto err; 575 } 576 strncpy(linebuf, p, linelen); 577 linebuf[linelen - 1] = '\0'; 578 p = strchr(linebuf, ' '); 579 if (p != NULL) 580 *p = '\0'; 581 errno = 0; 582 ul = strtoul(linebuf, &p, 10); 583 if (errno == 0) { 584 if (*p != '\0' || ul > INT_MAX) 585 errno = EINVAL; 586 } 587 if (errno) { 588 warn("mdconfig (list) unexpected output: %s", 589 linebuf); 590 ret = NULL; 591 goto err; 592 } 593 mdunit = (int)ul; 594 } else { 595 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 596 _PATH_MDCONFIG, vnodefile, mdunit); 597 if (error) { 598 /* md device not found. Ignore it. */ 599 close(fd); 600 if (!qflag) 601 warnx("md%d on %s: Device not found", 602 mdunit, vnodefile); 603 free(vnodefile); 604 return (NULL); 605 } 606 } 607 } 608 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV, 609 MD_NAME, mdunit); 610 mdpath[sizeof(mdpath) - 1] = '\0'; 611 ret = swap_on_off_sfile(mdpath, doingall); 612 613 if (which_prog == SWAPOFF) { 614 if (ret != NULL) { 615 error = run_cmd(NULL, "%s -d -u %d", 616 _PATH_MDCONFIG, mdunit); 617 if (error) 618 warn("mdconfig (detach) detach failed: %s%s%d", 619 _PATH_DEV, MD_NAME, mdunit); 620 } 621 } 622 err: 623 if (sfd != NULL) 624 fclose(sfd); 625 if (fd != -1) 626 close(fd); 627 free(vnodefile); 628 return (ret); 629 } 630 631 static int 632 run_cmd(int *ofd, const char *cmdline, ...) 633 { 634 va_list ap; 635 char **argv, **argvp, *cmd, *p; 636 int argc, pid, status, rv; 637 int pfd[2], nfd, dup2dn; 638 639 va_start(ap, cmdline); 640 rv = vasprintf(&cmd, cmdline, ap); 641 if (rv == -1) { 642 warn("%s", __func__); 643 return (rv); 644 } 645 va_end(ap); 646 647 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 648 argc++; 649 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 650 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 651 if (**argvp != '\0' && (++argvp > &argv[argc])) { 652 *argvp = NULL; 653 break; 654 } 655 /* The argv array ends up NULL-terminated here. */ 656 #if 0 657 { 658 int i; 659 660 fprintf(stderr, "DEBUG: running:"); 661 /* Should be equivalent to 'cmd' (before strsep, of course). */ 662 for (i = 0; argv[i] != NULL; i++) 663 fprintf(stderr, " %s", argv[i]); 664 fprintf(stderr, "\n"); 665 } 666 #endif 667 dup2dn = 1; 668 if (ofd != NULL) { 669 if (pipe(&pfd[0]) == -1) { 670 warn("%s: pipe", __func__); 671 return (-1); 672 } 673 *ofd = pfd[0]; 674 dup2dn = 0; 675 } 676 pid = fork(); 677 switch (pid) { 678 case 0: 679 /* Child process. */ 680 if (ofd != NULL) 681 if (dup2(pfd[1], STDOUT_FILENO) < 0) 682 err(1, "dup2 in %s", __func__); 683 nfd = open(_PATH_DEVNULL, O_RDWR); 684 if (nfd == -1) 685 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 686 if (dup2(nfd, STDIN_FILENO) < 0) 687 err(1, "%s: dup2", __func__); 688 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 689 err(1, "%s: dup2", __func__); 690 if (dup2(nfd, STDERR_FILENO) < 0) 691 err(1, "%s: dup2", __func__); 692 execv(argv[0], argv); 693 warn("exec: %s", argv[0]); 694 _exit(-1); 695 case -1: 696 err(1, "%s: fork", __func__); 697 } 698 free(cmd); 699 free(argv); 700 while (waitpid(pid, &status, 0) != pid) 701 ; 702 return (WEXITSTATUS(status)); 703 } 704 705 static const char * 706 swap_on_off_sfile(const char *name, int doingall) 707 { 708 int error; 709 710 if (which_prog == SWAPON) 711 error = swapon(name); 712 else /* SWAPOFF */ 713 error = swapoff(name); 714 715 if (error == -1) { 716 switch (errno) { 717 case EBUSY: 718 if (doingall == 0) 719 warnx("%s: Device already in use", name); 720 break; 721 case EINVAL: 722 if (which_prog == SWAPON) 723 warnx("%s: NSWAPDEV limit reached", name); 724 else if (doingall == 0) 725 warn("%s", name); 726 break; 727 default: 728 warn("%s", name); 729 break; 730 } 731 return (NULL); 732 } 733 return (name); 734 } 735 736 static void 737 usage(void) 738 { 739 740 fprintf(stderr, "usage: %s ", getprogname()); 741 switch(orig_prog) { 742 case SWAPON: 743 case SWAPOFF: 744 fprintf(stderr, "[-F fstab] -aLq | file ...\n"); 745 break; 746 case SWAPCTL: 747 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 748 break; 749 } 750 exit(1); 751 } 752 753 static void 754 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 755 long blocksize) 756 { 757 char tmp[16]; 758 759 if (hflag == 'H') { 760 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 761 HN_B | HN_NOSPACE | HN_DECIMAL); 762 snprintf(buf, bufsize, "%*s", hlen, tmp); 763 } else 764 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 765 } 766 767 static void 768 swaplist(int lflag, int sflag, int hflag) 769 { 770 size_t mibsize, size; 771 struct xswdev xsw; 772 int hlen, mib[16], n, pagesize; 773 long blocksize; 774 long long total = 0; 775 long long used = 0; 776 long long tmp_total; 777 long long tmp_used; 778 char buf[32]; 779 780 pagesize = getpagesize(); 781 switch(hflag) { 782 case 'G': 783 blocksize = 1024 * 1024 * 1024; 784 strlcpy(buf, "1GB-blocks", sizeof(buf)); 785 hlen = 10; 786 break; 787 case 'H': 788 blocksize = -1; 789 strlcpy(buf, "Bytes", sizeof(buf)); 790 hlen = 10; 791 break; 792 case 'K': 793 blocksize = 1024; 794 strlcpy(buf, "1kB-blocks", sizeof(buf)); 795 hlen = 10; 796 break; 797 case 'M': 798 blocksize = 1024 * 1024; 799 strlcpy(buf, "1MB-blocks", sizeof(buf)); 800 hlen = 10; 801 break; 802 default: 803 getbsize(&hlen, &blocksize); 804 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 805 break; 806 } 807 808 mibsize = nitems(mib); 809 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 810 err(1, "sysctlnametomib()"); 811 812 if (lflag) { 813 printf("%-13s %*s %*s\n", 814 "Device:", 815 hlen, buf, 816 hlen, "Used:"); 817 } 818 819 for (n = 0; ; ++n) { 820 mib[mibsize] = n; 821 size = sizeof xsw; 822 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1) 823 break; 824 if (xsw.xsw_version != XSWDEV_VERSION) 825 errx(1, "xswdev version mismatch"); 826 827 tmp_total = (long long)xsw.xsw_nblks * pagesize; 828 tmp_used = (long long)xsw.xsw_used * pagesize; 829 total += tmp_total; 830 used += tmp_used; 831 if (lflag) { 832 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 833 blocksize); 834 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR), 835 buf); 836 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 837 blocksize); 838 printf("%s\n", buf); 839 } 840 } 841 if (errno != ENOENT) 842 err(1, "sysctl()"); 843 844 if (sflag) { 845 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 846 printf("Total: %s ", buf); 847 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 848 printf("%s\n", buf); 849 } 850 } 851 852