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 /* 176 * Forcibly enable "late" option when file= is 177 * specified. This is because mounting file 178 * systems with rw option is typically 179 * required to make the backing store ready. 180 */ 181 if (which_prog != SWAPOFF && 182 (strstr(fsp->fs_mntops, "late") != NULL || 183 strstr(fsp->fs_mntops, "file=") != NULL) && 184 late == 0) 185 continue; 186 swfile = swap_on_off(fsp->fs_spec, 1, 187 fsp->fs_mntops); 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[PATH_MAX]; 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 basename_r(name, base); 238 239 /* Swap on encrypted device by GEOM_BDE. */ 240 if (fnmatch("*.bde", base, 0) == 0) 241 return (swap_on_off_gbde(name, doingall)); 242 243 /* Swap on encrypted device by GEOM_ELI. */ 244 if (fnmatch("*.eli", base, 0) == 0) 245 return (swap_on_off_geli(name, mntops, doingall)); 246 247 /* Swap on special file. */ 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 static const char * 266 swap_on_off_gbde(const char *name, int doingall) 267 { 268 const char *ret; 269 char pass[64 * 2 + 1]; 270 unsigned char bpass[64]; 271 char *dname; 272 int i, error; 273 274 dname = swap_basename(name); 275 if (dname == NULL) 276 return (NULL); 277 278 if (which_prog == SWAPON) { 279 arc4random_buf(bpass, sizeof(bpass)); 280 for (i = 0; i < (int)sizeof(bpass); i++) 281 sprintf(&pass[2 * i], "%02x", bpass[i]); 282 pass[sizeof(pass) - 1] = '\0'; 283 284 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE, 285 dname, pass); 286 if (error) { 287 /* bde device found. Ignore it. */ 288 free(dname); 289 if (qflag == 0) 290 warnx("%s: Device already in use", name); 291 return (NULL); 292 } 293 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE, 294 dname, pass); 295 free(dname); 296 if (error) { 297 warnx("gbde (attach) error: %s", name); 298 return (NULL); 299 } 300 } 301 302 ret = swap_on_off_sfile(name, doingall); 303 304 if (which_prog == SWAPOFF) { 305 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname); 306 free(dname); 307 if (error) { 308 /* bde device not found. Ignore it. */ 309 if (qflag == 0) 310 warnx("%s: Device not found", name); 311 return (NULL); 312 } 313 } 314 315 return (ret); 316 } 317 318 /* Build geli(8) arguments from mntops */ 319 static char * 320 swap_on_geli_args(const char *mntops) 321 { 322 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 323 const char *aflag, *eflag, *lflag, *sflag; 324 char *p, *args, *token, *string, *ops; 325 int argsize, pagesize; 326 size_t pagesize_len; 327 u_long ul; 328 329 /* Use built-in defaults for geli(8). */ 330 aalgo = ealgo = keylen_str = ""; 331 aflag = eflag = lflag = ""; 332 333 /* We will always specify sectorsize. */ 334 sflag = " -s "; 335 sectorsize_str = NULL; 336 337 if (mntops != NULL) { 338 string = ops = strdup(mntops); 339 340 while ((token = strsep(&string, ",")) != NULL) { 341 if ((p = strstr(token, "aalgo=")) == token) { 342 aalgo = p + sizeof("aalgo=") - 1; 343 aflag = " -a "; 344 } else if ((p = strstr(token, "ealgo=")) == token) { 345 ealgo = p + sizeof("ealgo=") - 1; 346 eflag = " -e "; 347 } else if ((p = strstr(token, "keylen=")) == token) { 348 keylen_str = p + sizeof("keylen=") - 1; 349 errno = 0; 350 ul = strtoul(keylen_str, &p, 10); 351 if (errno == 0) { 352 if (*p != '\0' || ul > INT_MAX) 353 errno = EINVAL; 354 } 355 if (errno) { 356 warn("Invalid keylen: %s", keylen_str); 357 free(ops); 358 return (NULL); 359 } 360 lflag = " -l "; 361 } else if ((p = strstr(token, "sectorsize=")) == token) { 362 sectorsize_str = p + sizeof("sectorsize=") - 1; 363 errno = 0; 364 ul = strtoul(sectorsize_str, &p, 10); 365 if (errno == 0) { 366 if (*p != '\0' || ul > INT_MAX) 367 errno = EINVAL; 368 } 369 if (errno) { 370 warn("Invalid sectorsize: %s", 371 sectorsize_str); 372 free(ops); 373 return (NULL); 374 } 375 } else if (strcmp(token, "sw") != 0) { 376 warnx("Invalid option: %s", token); 377 free(ops); 378 return (NULL); 379 } 380 } 381 } else 382 ops = NULL; 383 384 /* 385 * If we do not have a sector size at this point, fill in 386 * pagesize as sector size. 387 */ 388 if (sectorsize_str == NULL) { 389 /* Use pagesize as default sectorsize. */ 390 pagesize = getpagesize(); 391 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 392 p = alloca(pagesize_len); 393 snprintf(p, pagesize_len, "%d", pagesize); 394 sectorsize_str = p; 395 } 396 397 argsize = asprintf(&args, "%s%s%s%s%s%s%s%s -d", 398 aflag, aalgo, eflag, ealgo, lflag, keylen_str, 399 sflag, sectorsize_str); 400 401 free(ops); 402 return (args); 403 } 404 405 static const char * 406 swap_on_off_geli(const char *name, char *mntops, int doingall) 407 { 408 struct stat sb; 409 char *dname, *args; 410 int error; 411 412 error = stat(name, &sb); 413 414 if (which_prog == SWAPON) do { 415 /* Skip if the .eli device already exists. */ 416 if (error == 0) 417 break; 418 419 args = swap_on_geli_args(mntops); 420 if (args == NULL) 421 return (NULL); 422 423 dname = swap_basename(name); 424 if (dname == NULL) { 425 free(args); 426 return (NULL); 427 } 428 429 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args, 430 dname); 431 432 free(dname); 433 free(args); 434 435 if (error) { 436 /* error occured during creation. */ 437 if (qflag == 0) 438 warnx("%s: Invalid parameters", name); 439 return (NULL); 440 } 441 } while (0); 442 443 return (swap_on_off_sfile(name, doingall)); 444 } 445 446 static const char * 447 swap_on_off_md(const char *name, char *mntops, int doingall) 448 { 449 FILE *sfd; 450 int fd, mdunit, error; 451 const char *ret; 452 static char mdpath[PATH_MAX], linebuf[PATH_MAX]; 453 char *p, *vnodefile; 454 size_t linelen; 455 u_long ul; 456 457 fd = -1; 458 sfd = NULL; 459 if (strlen(name) == (sizeof(MD_NAME) - 1)) 460 mdunit = -1; 461 else { 462 errno = 0; 463 ul = strtoul(name + 2, &p, 10); 464 if (errno == 0) { 465 if (*p != '\0' || ul > INT_MAX) 466 errno = EINVAL; 467 } 468 if (errno) { 469 warn("Bad device unit: %s", name); 470 return (NULL); 471 } 472 mdunit = (int)ul; 473 } 474 475 vnodefile = NULL; 476 if ((p = strstr(mntops, "file=")) != NULL) { 477 vnodefile = strdup(p + sizeof("file=") - 1); 478 p = strchr(vnodefile, ','); 479 if (p != NULL) 480 *p = '\0'; 481 } 482 if (vnodefile == NULL) { 483 warnx("file option not found for %s", name); 484 return (NULL); 485 } 486 487 if (which_prog == SWAPON) { 488 if (mdunit == -1) { 489 error = run_cmd(&fd, "%s -l -n -f %s", 490 _PATH_MDCONFIG, vnodefile); 491 if (error == 0) { 492 /* md device found. Ignore it. */ 493 close(fd); 494 if (!qflag) 495 warnx("%s: Device already in use", 496 vnodefile); 497 free(vnodefile); 498 return (NULL); 499 } 500 error = run_cmd(&fd, "%s -a -t vnode -n -f %s", 501 _PATH_MDCONFIG, vnodefile); 502 if (error) { 503 warnx("mdconfig (attach) error: file=%s", 504 vnodefile); 505 free(vnodefile); 506 return (NULL); 507 } 508 sfd = fdopen(fd, "r"); 509 if (sfd == NULL) { 510 warn("mdconfig (attach) fdopen error"); 511 ret = NULL; 512 goto err; 513 } 514 p = fgetln(sfd, &linelen); 515 if (p == NULL && 516 (linelen < 2 || linelen > sizeof(linebuf))) { 517 warn("mdconfig (attach) unexpected output"); 518 ret = NULL; 519 goto err; 520 } 521 strncpy(linebuf, p, linelen); 522 linebuf[linelen - 1] = '\0'; 523 errno = 0; 524 ul = strtoul(linebuf, &p, 10); 525 if (errno == 0) { 526 if (*p != '\0' || ul > INT_MAX) 527 errno = EINVAL; 528 } 529 if (errno) { 530 warn("mdconfig (attach) unexpected output: %s", 531 linebuf); 532 ret = NULL; 533 goto err; 534 } 535 mdunit = (int)ul; 536 } else { 537 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 538 _PATH_MDCONFIG, vnodefile, mdunit); 539 if (error == 0) { 540 /* md device found. Ignore it. */ 541 close(fd); 542 if (qflag == 0) 543 warnx("md%d on %s: Device already " 544 "in use", mdunit, vnodefile); 545 free(vnodefile); 546 return (NULL); 547 } 548 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s", 549 _PATH_MDCONFIG, mdunit, vnodefile); 550 if (error) { 551 warnx("mdconfig (attach) error: " 552 "md%d on file=%s", mdunit, vnodefile); 553 free(vnodefile); 554 return (NULL); 555 } 556 } 557 } else /* SWAPOFF */ { 558 if (mdunit == -1) { 559 error = run_cmd(&fd, "%s -l -n -f %s", 560 _PATH_MDCONFIG, vnodefile); 561 if (error) { 562 /* md device not found. Ignore it. */ 563 close(fd); 564 if (!qflag) 565 warnx("md on %s: Device not found", 566 vnodefile); 567 free(vnodefile); 568 return (NULL); 569 } 570 sfd = fdopen(fd, "r"); 571 if (sfd == NULL) { 572 warn("mdconfig (list) fdopen error"); 573 ret = NULL; 574 goto err; 575 } 576 p = fgetln(sfd, &linelen); 577 if (p == NULL && 578 (linelen < 2 || linelen > sizeof(linebuf) - 1)) { 579 warn("mdconfig (list) unexpected output"); 580 ret = NULL; 581 goto err; 582 } 583 strncpy(linebuf, p, linelen); 584 linebuf[linelen - 1] = '\0'; 585 p = strchr(linebuf, ' '); 586 if (p != NULL) 587 *p = '\0'; 588 errno = 0; 589 ul = strtoul(linebuf, &p, 10); 590 if (errno == 0) { 591 if (*p != '\0' || ul > INT_MAX) 592 errno = EINVAL; 593 } 594 if (errno) { 595 warn("mdconfig (list) unexpected output: %s", 596 linebuf); 597 ret = NULL; 598 goto err; 599 } 600 mdunit = (int)ul; 601 } else { 602 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 603 _PATH_MDCONFIG, vnodefile, mdunit); 604 if (error) { 605 /* md device not found. Ignore it. */ 606 close(fd); 607 if (!qflag) 608 warnx("md%d on %s: Device not found", 609 mdunit, vnodefile); 610 free(vnodefile); 611 return (NULL); 612 } 613 } 614 } 615 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV, 616 MD_NAME, mdunit); 617 mdpath[sizeof(mdpath) - 1] = '\0'; 618 ret = swap_on_off_sfile(mdpath, doingall); 619 620 if (which_prog == SWAPOFF) { 621 if (ret != NULL) { 622 error = run_cmd(NULL, "%s -d -u %d", 623 _PATH_MDCONFIG, mdunit); 624 if (error) 625 warn("mdconfig (detach) detach failed: %s%s%d", 626 _PATH_DEV, MD_NAME, mdunit); 627 } 628 } 629 err: 630 if (sfd != NULL) 631 fclose(sfd); 632 if (fd != -1) 633 close(fd); 634 free(vnodefile); 635 return (ret); 636 } 637 638 static int 639 run_cmd(int *ofd, const char *cmdline, ...) 640 { 641 va_list ap; 642 char **argv, **argvp, *cmd, *p; 643 int argc, pid, status, rv; 644 int pfd[2], nfd, dup2dn; 645 646 va_start(ap, cmdline); 647 rv = vasprintf(&cmd, cmdline, ap); 648 if (rv == -1) { 649 warn("%s", __func__); 650 return (rv); 651 } 652 va_end(ap); 653 654 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 655 argc++; 656 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 657 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 658 if (**argvp != '\0' && (++argvp > &argv[argc])) { 659 *argvp = NULL; 660 break; 661 } 662 /* The argv array ends up NULL-terminated here. */ 663 #if 0 664 { 665 int i; 666 667 fprintf(stderr, "DEBUG: running:"); 668 /* Should be equivalent to 'cmd' (before strsep, of course). */ 669 for (i = 0; argv[i] != NULL; i++) 670 fprintf(stderr, " %s", argv[i]); 671 fprintf(stderr, "\n"); 672 } 673 #endif 674 dup2dn = 1; 675 if (ofd != NULL) { 676 if (pipe(&pfd[0]) == -1) { 677 warn("%s: pipe", __func__); 678 return (-1); 679 } 680 *ofd = pfd[0]; 681 dup2dn = 0; 682 } 683 pid = fork(); 684 switch (pid) { 685 case 0: 686 /* Child process. */ 687 if (ofd != NULL) 688 if (dup2(pfd[1], STDOUT_FILENO) < 0) 689 err(1, "dup2 in %s", __func__); 690 nfd = open(_PATH_DEVNULL, O_RDWR); 691 if (nfd == -1) 692 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 693 if (dup2(nfd, STDIN_FILENO) < 0) 694 err(1, "%s: dup2", __func__); 695 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 696 err(1, "%s: dup2", __func__); 697 if (dup2(nfd, STDERR_FILENO) < 0) 698 err(1, "%s: dup2", __func__); 699 execv(argv[0], argv); 700 warn("exec: %s", argv[0]); 701 _exit(-1); 702 case -1: 703 err(1, "%s: fork", __func__); 704 } 705 free(cmd); 706 free(argv); 707 while (waitpid(pid, &status, 0) != pid) 708 ; 709 return (WEXITSTATUS(status)); 710 } 711 712 static const char * 713 swap_on_off_sfile(const char *name, int doingall) 714 { 715 int error; 716 717 if (which_prog == SWAPON) 718 error = swapon(name); 719 else /* SWAPOFF */ 720 error = swapoff(name); 721 722 if (error == -1) { 723 switch (errno) { 724 case EBUSY: 725 if (doingall == 0) 726 warnx("%s: Device already in use", name); 727 break; 728 case EINVAL: 729 if (which_prog == SWAPON) 730 warnx("%s: NSWAPDEV limit reached", name); 731 else if (doingall == 0) 732 warn("%s", name); 733 break; 734 default: 735 warn("%s", name); 736 break; 737 } 738 return (NULL); 739 } 740 return (name); 741 } 742 743 static void 744 usage(void) 745 { 746 747 fprintf(stderr, "usage: %s ", getprogname()); 748 switch(orig_prog) { 749 case SWAPON: 750 case SWAPOFF: 751 fprintf(stderr, "[-F fstab] -aLq | file ...\n"); 752 break; 753 case SWAPCTL: 754 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 755 break; 756 } 757 exit(1); 758 } 759 760 static void 761 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 762 long blocksize) 763 { 764 char tmp[16]; 765 766 if (hflag == 'H') { 767 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 768 HN_B | HN_NOSPACE | HN_DECIMAL); 769 snprintf(buf, bufsize, "%*s", hlen, tmp); 770 } else 771 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 772 } 773 774 static void 775 swaplist(int lflag, int sflag, int hflag) 776 { 777 size_t mibsize, size; 778 struct xswdev xsw; 779 int hlen, mib[16], n, pagesize; 780 long blocksize; 781 long long total = 0; 782 long long used = 0; 783 long long tmp_total; 784 long long tmp_used; 785 char buf[32]; 786 787 pagesize = getpagesize(); 788 switch(hflag) { 789 case 'G': 790 blocksize = 1024 * 1024 * 1024; 791 strlcpy(buf, "1GB-blocks", sizeof(buf)); 792 hlen = 10; 793 break; 794 case 'H': 795 blocksize = -1; 796 strlcpy(buf, "Bytes", sizeof(buf)); 797 hlen = 10; 798 break; 799 case 'K': 800 blocksize = 1024; 801 strlcpy(buf, "1kB-blocks", sizeof(buf)); 802 hlen = 10; 803 break; 804 case 'M': 805 blocksize = 1024 * 1024; 806 strlcpy(buf, "1MB-blocks", sizeof(buf)); 807 hlen = 10; 808 break; 809 default: 810 getbsize(&hlen, &blocksize); 811 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 812 break; 813 } 814 815 mibsize = nitems(mib); 816 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 817 err(1, "sysctlnametomib()"); 818 819 if (lflag) { 820 printf("%-13s %*s %*s\n", 821 "Device:", 822 hlen, buf, 823 hlen, "Used:"); 824 } 825 826 for (n = 0; ; ++n) { 827 mib[mibsize] = n; 828 size = sizeof xsw; 829 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1) 830 break; 831 if (xsw.xsw_version != XSWDEV_VERSION) 832 errx(1, "xswdev version mismatch"); 833 834 tmp_total = (long long)xsw.xsw_nblks * pagesize; 835 tmp_used = (long long)xsw.xsw_used * pagesize; 836 total += tmp_total; 837 used += tmp_used; 838 if (lflag) { 839 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 840 blocksize); 841 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR), 842 buf); 843 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 844 blocksize); 845 printf("%s\n", buf); 846 } 847 } 848 if (errno != ENOENT) 849 err(1, "sysctl()"); 850 851 if (sflag) { 852 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 853 printf("Total: %s ", buf); 854 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 855 printf("%s\n", buf); 856 } 857 } 858 859