swapon.c revision 308886
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 32static 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 38static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93"; 39#endif /* not lint */ 40#endif 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: stable/10/sbin/swapon/swapon.c 308886 2016-11-20 13:44:27Z jilles $"); 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 67static void usage(void); 68static const char *swap_on_off(const char *, int, char *); 69static const char *swap_on_off_gbde(const char *, int); 70static const char *swap_on_off_geli(const char *, char *, int); 71static const char *swap_on_off_md(const char *, char *, int); 72static const char *swap_on_off_sfile(const char *, int); 73static void swaplist(int, int, int); 74static int run_cmd(int *, const char *, ...) __printflike(2, 3); 75 76static enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; 77 78static int qflag; 79 80int 81main(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 if (which_prog == SWAPOFF && 180 strstr(fsp->fs_mntops, "late") == NULL && 181 late != 0) 182 continue; 183 swfile = swap_on_off(fsp->fs_spec, 1, 184 fsp->fs_mntops); 185 if (swfile == NULL) { 186 ret = 1; 187 continue; 188 } 189 if (qflag == 0) { 190 printf("%s: %sing %s as swap device\n", 191 getprogname(), 192 (which_prog == SWAPOFF) ? 193 "remov" : "add", swfile); 194 } 195 } 196 } else if (*argv == NULL) 197 usage(); 198 for (; *argv; ++argv) { 199 swfile = swap_on_off(*argv, 0, NULL); 200 if (swfile == NULL) { 201 ret = 1; 202 continue; 203 } 204 if (orig_prog == SWAPCTL) { 205 printf("%s: %sing %s as swap device\n", 206 getprogname(), 207 (which_prog == SWAPOFF) ? "remov" : "add", 208 swfile); 209 } 210 } 211 } else { 212 if (lflag || sflag) 213 swaplist(lflag, sflag, hflag); 214 else 215 usage(); 216 } 217 exit(ret); 218} 219 220static const char * 221swap_on_off(const char *name, int doingall, char *mntops) 222{ 223 char base[PATH_MAX]; 224 225 /* Swap on vnode-backed md(4) device. */ 226 if (mntops != NULL && 227 (fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 || 228 fnmatch(MD_NAME "[0-9]*", name, 0) == 0 || 229 strncmp(_PATH_DEV MD_NAME, name, 230 sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 || 231 strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0)) 232 return (swap_on_off_md(name, mntops, doingall)); 233 234 basename_r(name, base); 235 236 /* Swap on encrypted device by GEOM_BDE. */ 237 if (fnmatch("*.bde", base, 0) == 0) 238 return (swap_on_off_gbde(name, doingall)); 239 240 /* Swap on encrypted device by GEOM_ELI. */ 241 if (fnmatch("*.eli", base, 0) == 0) 242 return (swap_on_off_geli(name, mntops, doingall)); 243 244 /* Swap on special file. */ 245 return (swap_on_off_sfile(name, doingall)); 246} 247 248/* Strip off .bde or .eli suffix from swap device name */ 249static char * 250swap_basename(const char *name) 251{ 252 char *dname, *p; 253 254 dname = strdup(name); 255 p = strrchr(dname, '.'); 256 /* assert(p != NULL); */ 257 *p = '\0'; 258 259 return (dname); 260} 261 262static const char * 263swap_on_off_gbde(const char *name, int doingall) 264{ 265 const char *ret; 266 char pass[64 * 2 + 1]; 267 unsigned char bpass[64]; 268 char *dname; 269 int i, error; 270 271 dname = swap_basename(name); 272 if (dname == NULL) 273 return (NULL); 274 275 if (which_prog == SWAPON) { 276 arc4random_buf(bpass, sizeof(bpass)); 277 for (i = 0; i < (int)sizeof(bpass); i++) 278 sprintf(&pass[2 * i], "%02x", bpass[i]); 279 pass[sizeof(pass) - 1] = '\0'; 280 281 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE, 282 dname, pass); 283 if (error) { 284 /* bde device found. Ignore it. */ 285 free(dname); 286 if (qflag == 0) 287 warnx("%s: Device already in use", name); 288 return (NULL); 289 } 290 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE, 291 dname, pass); 292 free(dname); 293 if (error) { 294 warnx("gbde (attach) error: %s", name); 295 return (NULL); 296 } 297 } 298 299 ret = swap_on_off_sfile(name, doingall); 300 301 if (which_prog == SWAPOFF) { 302 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname); 303 free(dname); 304 if (error) { 305 /* bde device not found. Ignore it. */ 306 if (qflag == 0) 307 warnx("%s: Device not found", name); 308 return (NULL); 309 } 310 } 311 312 return (ret); 313} 314 315/* Build geli(8) arguments from mntops */ 316static char * 317swap_on_geli_args(const char *mntops) 318{ 319 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 320 const char *aflag, *eflag, *lflag, *sflag; 321 char *p, *args, *token, *string, *ops; 322 int 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", 368 sectorsize_str); 369 free(ops); 370 return (NULL); 371 } 372 } else if (strcmp(token, "sw") != 0) { 373 warnx("Invalid option: %s", token); 374 free(ops); 375 return (NULL); 376 } 377 } 378 } else 379 ops = NULL; 380 381 /* 382 * If we do not have a sector size at this point, fill in 383 * pagesize as sector size. 384 */ 385 if (sectorsize_str == NULL) { 386 /* Use pagesize as default sectorsize. */ 387 pagesize = getpagesize(); 388 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 389 p = alloca(pagesize_len); 390 snprintf(p, pagesize_len, "%d", pagesize); 391 sectorsize_str = p; 392 } 393 394 (void)asprintf(&args, "%s%s%s%s%s%s%s%s -d", 395 aflag, aalgo, eflag, ealgo, lflag, keylen_str, 396 sflag, sectorsize_str); 397 398 free(ops); 399 return (args); 400} 401 402static const char * 403swap_on_off_geli(const char *name, char *mntops, int doingall) 404{ 405 struct stat sb; 406 char *dname, *args; 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 == 0) 435 warnx("%s: Invalid parameters", name); 436 return (NULL); 437 } 438 } while (0); 439 440 return (swap_on_off_sfile(name, doingall)); 441} 442 443static const char * 444swap_on_off_md(const char *name, char *mntops, int doingall) 445{ 446 FILE *sfd; 447 int fd, mdunit, error; 448 const char *ret; 449 static 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 == 0) 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 } 626err: 627 if (sfd != NULL) 628 fclose(sfd); 629 if (fd != -1) 630 close(fd); 631 free(vnodefile); 632 return (ret); 633} 634 635static int 636run_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 va_end(ap); 648 return (rv); 649 } 650 va_end(ap); 651 652 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 653 argc++; 654 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 655 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 656 if (**argvp != '\0' && (++argvp > &argv[argc])) { 657 *argvp = NULL; 658 break; 659 } 660 /* The argv array ends up NULL-terminated here. */ 661#if 0 662 { 663 int i; 664 665 fprintf(stderr, "DEBUG: running:"); 666 /* Should be equivalent to 'cmd' (before strsep, of course). */ 667 for (i = 0; argv[i] != NULL; i++) 668 fprintf(stderr, " %s", argv[i]); 669 fprintf(stderr, "\n"); 670 } 671#endif 672 dup2dn = 1; 673 if (ofd != NULL) { 674 if (pipe(&pfd[0]) == -1) { 675 warn("%s: pipe", __func__); 676 return (-1); 677 } 678 *ofd = pfd[0]; 679 dup2dn = 0; 680 } 681 pid = fork(); 682 switch (pid) { 683 case 0: 684 /* Child process. */ 685 if (ofd != NULL) 686 if (dup2(pfd[1], STDOUT_FILENO) < 0) 687 err(1, "dup2 in %s", __func__); 688 nfd = open(_PATH_DEVNULL, O_RDWR); 689 if (nfd == -1) 690 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 691 if (dup2(nfd, STDIN_FILENO) < 0) 692 err(1, "%s: dup2", __func__); 693 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 694 err(1, "%s: dup2", __func__); 695 if (dup2(nfd, STDERR_FILENO) < 0) 696 err(1, "%s: dup2", __func__); 697 execv(argv[0], argv); 698 warn("exec: %s", argv[0]); 699 _exit(-1); 700 case -1: 701 err(1, "%s: fork", __func__); 702 } 703 free(cmd); 704 free(argv); 705 while (waitpid(pid, &status, 0) != pid) 706 ; 707 return (WEXITSTATUS(status)); 708} 709 710static const char * 711swap_on_off_sfile(const char *name, int doingall) 712{ 713 int error; 714 715 if (which_prog == SWAPON) 716 error = swapon(name); 717 else /* SWAPOFF */ 718 error = swapoff(name); 719 720 if (error == -1) { 721 switch (errno) { 722 case EBUSY: 723 if (doingall == 0) 724 warnx("%s: Device already in use", name); 725 break; 726 case EINVAL: 727 if (which_prog == SWAPON) 728 warnx("%s: NSWAPDEV limit reached", name); 729 else if (doingall == 0) 730 warn("%s", name); 731 break; 732 default: 733 warn("%s", name); 734 break; 735 } 736 return (NULL); 737 } 738 return (name); 739} 740 741static void 742usage(void) 743{ 744 745 fprintf(stderr, "usage: %s ", getprogname()); 746 switch(orig_prog) { 747 case SWAPON: 748 case SWAPOFF: 749 fprintf(stderr, "[-F fstab] -aLq | file ...\n"); 750 break; 751 case SWAPCTL: 752 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 753 break; 754 } 755 exit(1); 756} 757 758static void 759sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 760 long blocksize) 761{ 762 char tmp[16]; 763 764 if (hflag == 'H') { 765 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 766 HN_B | HN_NOSPACE | HN_DECIMAL); 767 snprintf(buf, bufsize, "%*s", hlen, tmp); 768 } else 769 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 770} 771 772static void 773swaplist(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 = nitems(mib); 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