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 * 3. 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 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 } 219 220 static const char * 221 swap_on_off(const char *name, int doingall, char *mntops) 222 { 223 char *base, *basebuf; 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 basebuf = strdup(name); 235 base = basename(basebuf); 236 237 /* Swap on encrypted device by GEOM_BDE. */ 238 if (fnmatch("*.bde", base, 0) == 0) { 239 free(basebuf); 240 return (swap_on_off_gbde(name, doingall)); 241 } 242 243 /* Swap on encrypted device by GEOM_ELI. */ 244 if (fnmatch("*.eli", base, 0) == 0) { 245 free(basebuf); 246 return (swap_on_off_geli(name, mntops, doingall)); 247 } 248 249 /* Swap on special file. */ 250 free(basebuf); 251 return (swap_on_off_sfile(name, doingall)); 252 } 253 254 /* Strip off .bde or .eli suffix from swap device name */ 255 static char * 256 swap_basename(const char *name) 257 { 258 char *dname, *p; 259 260 dname = strdup(name); 261 p = strrchr(dname, '.'); 262 /* assert(p != NULL); */ 263 *p = '\0'; 264 265 return (dname); 266 } 267 268 static const char * 269 swap_on_off_gbde(const char *name, int doingall) 270 { 271 const char *ret; 272 char pass[64 * 2 + 1]; 273 unsigned char bpass[64]; 274 char *dname; 275 int i, error; 276 277 dname = swap_basename(name); 278 if (dname == NULL) 279 return (NULL); 280 281 if (which_prog == SWAPON) { 282 arc4random_buf(bpass, sizeof(bpass)); 283 for (i = 0; i < (int)sizeof(bpass); i++) 284 sprintf(&pass[2 * i], "%02x", bpass[i]); 285 pass[sizeof(pass) - 1] = '\0'; 286 287 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE, 288 dname, pass); 289 if (error) { 290 /* bde device found. Ignore it. */ 291 free(dname); 292 if (qflag == 0) 293 warnx("%s: Device already in use", name); 294 return (NULL); 295 } 296 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE, 297 dname, pass); 298 free(dname); 299 if (error) { 300 warnx("gbde (attach) error: %s", name); 301 return (NULL); 302 } 303 } 304 305 ret = swap_on_off_sfile(name, doingall); 306 307 if (which_prog == SWAPOFF) { 308 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname); 309 free(dname); 310 if (error) { 311 /* bde device not found. Ignore it. */ 312 if (qflag == 0) 313 warnx("%s: Device not found", name); 314 return (NULL); 315 } 316 } 317 318 return (ret); 319 } 320 321 /* Build geli(8) arguments from mntops */ 322 static char * 323 swap_on_geli_args(const char *mntops) 324 { 325 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 326 const char *aflag, *eflag, *lflag, *Tflag, *sflag; 327 char *p, *args, *token, *string, *ops; 328 int pagesize; 329 size_t pagesize_len; 330 u_long ul; 331 332 /* Use built-in defaults for geli(8). */ 333 aalgo = ealgo = keylen_str = ""; 334 aflag = eflag = lflag = Tflag = ""; 335 336 /* We will always specify sectorsize. */ 337 sflag = " -s "; 338 sectorsize_str = NULL; 339 340 if (mntops != NULL) { 341 string = ops = strdup(mntops); 342 343 while ((token = strsep(&string, ",")) != NULL) { 344 if ((p = strstr(token, "aalgo=")) == token) { 345 aalgo = p + sizeof("aalgo=") - 1; 346 aflag = " -a "; 347 } else if ((p = strstr(token, "ealgo=")) == token) { 348 ealgo = p + sizeof("ealgo=") - 1; 349 eflag = " -e "; 350 } else if ((p = strstr(token, "keylen=")) == token) { 351 keylen_str = p + sizeof("keylen=") - 1; 352 errno = 0; 353 ul = strtoul(keylen_str, &p, 10); 354 if (errno == 0) { 355 if (*p != '\0' || ul > INT_MAX) 356 errno = EINVAL; 357 } 358 if (errno) { 359 warn("Invalid keylen: %s", keylen_str); 360 free(ops); 361 return (NULL); 362 } 363 lflag = " -l "; 364 } else if ((p = strstr(token, "sectorsize=")) == token) { 365 sectorsize_str = p + sizeof("sectorsize=") - 1; 366 errno = 0; 367 ul = strtoul(sectorsize_str, &p, 10); 368 if (errno == 0) { 369 if (*p != '\0' || ul > INT_MAX) 370 errno = EINVAL; 371 } 372 if (errno) { 373 warn("Invalid sectorsize: %s", 374 sectorsize_str); 375 free(ops); 376 return (NULL); 377 } 378 } else if ((p = strstr(token, "notrim")) == token) { 379 Tflag = " -T "; 380 } else if (strcmp(token, "sw") != 0) { 381 warnx("Invalid option: %s", token); 382 free(ops); 383 return (NULL); 384 } 385 } 386 } else 387 ops = NULL; 388 389 /* 390 * If we do not have a sector size at this point, fill in 391 * pagesize as sector size. 392 */ 393 if (sectorsize_str == NULL) { 394 /* Use pagesize as default sectorsize. */ 395 pagesize = getpagesize(); 396 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 397 p = alloca(pagesize_len); 398 snprintf(p, pagesize_len, "%d", pagesize); 399 sectorsize_str = p; 400 } 401 402 (void)asprintf(&args, "%s%s%s%s%s%s%s%s%s -d", 403 aflag, aalgo, eflag, ealgo, lflag, keylen_str, Tflag, 404 sflag, sectorsize_str); 405 406 free(ops); 407 return (args); 408 } 409 410 static const char * 411 swap_on_off_geli(const char *name, char *mntops, int doingall) 412 { 413 struct stat sb; 414 char *dname, *args; 415 int error; 416 417 error = stat(name, &sb); 418 419 if (which_prog == SWAPON) do { 420 /* Skip if the .eli device already exists. */ 421 if (error == 0) 422 break; 423 424 args = swap_on_geli_args(mntops); 425 if (args == NULL) 426 return (NULL); 427 428 dname = swap_basename(name); 429 if (dname == NULL) { 430 free(args); 431 return (NULL); 432 } 433 434 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args, 435 dname); 436 437 free(dname); 438 free(args); 439 440 if (error) { 441 /* error occurred during creation. */ 442 if (qflag == 0) 443 warnx("%s: Invalid parameters", name); 444 return (NULL); 445 } 446 } while (0); 447 448 return (swap_on_off_sfile(name, doingall)); 449 } 450 451 static const char * 452 swap_on_off_md(const char *name, char *mntops, int doingall) 453 { 454 FILE *sfd; 455 int fd, mdunit, error; 456 const char *ret; 457 static char mdpath[PATH_MAX], linebuf[PATH_MAX]; 458 char *p, *vnodefile; 459 size_t linelen; 460 u_long ul; 461 462 fd = -1; 463 sfd = NULL; 464 if (strlen(name) == (sizeof(MD_NAME) - 1)) 465 mdunit = -1; 466 else { 467 errno = 0; 468 ul = strtoul(name + 2, &p, 10); 469 if (errno == 0) { 470 if (*p != '\0' || ul > INT_MAX) 471 errno = EINVAL; 472 } 473 if (errno) { 474 warn("Bad device unit: %s", name); 475 return (NULL); 476 } 477 mdunit = (int)ul; 478 } 479 480 vnodefile = NULL; 481 if ((p = strstr(mntops, "file=")) != NULL) { 482 vnodefile = strdup(p + sizeof("file=") - 1); 483 p = strchr(vnodefile, ','); 484 if (p != NULL) 485 *p = '\0'; 486 } 487 if (vnodefile == NULL) { 488 warnx("file option not found for %s", name); 489 return (NULL); 490 } 491 492 if (which_prog == SWAPON) { 493 if (mdunit == -1) { 494 error = run_cmd(&fd, "%s -l -n -f %s", 495 _PATH_MDCONFIG, vnodefile); 496 if (error == 0) { 497 /* md device found. Ignore it. */ 498 close(fd); 499 if (!qflag) 500 warnx("%s: Device already in use", 501 vnodefile); 502 free(vnodefile); 503 return (NULL); 504 } 505 error = run_cmd(&fd, "%s -a -t vnode -n -f %s", 506 _PATH_MDCONFIG, vnodefile); 507 if (error) { 508 warnx("mdconfig (attach) error: file=%s", 509 vnodefile); 510 free(vnodefile); 511 return (NULL); 512 } 513 sfd = fdopen(fd, "r"); 514 if (sfd == NULL) { 515 warn("mdconfig (attach) fdopen error"); 516 ret = NULL; 517 goto err; 518 } 519 p = fgetln(sfd, &linelen); 520 if (p == NULL && 521 (linelen < 2 || linelen > sizeof(linebuf))) { 522 warn("mdconfig (attach) unexpected output"); 523 ret = NULL; 524 goto err; 525 } 526 strncpy(linebuf, p, linelen); 527 linebuf[linelen - 1] = '\0'; 528 errno = 0; 529 ul = strtoul(linebuf, &p, 10); 530 if (errno == 0) { 531 if (*p != '\0' || ul > INT_MAX) 532 errno = EINVAL; 533 } 534 if (errno) { 535 warn("mdconfig (attach) unexpected output: %s", 536 linebuf); 537 ret = NULL; 538 goto err; 539 } 540 mdunit = (int)ul; 541 } else { 542 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 543 _PATH_MDCONFIG, vnodefile, mdunit); 544 if (error == 0) { 545 /* md device found. Ignore it. */ 546 close(fd); 547 if (qflag == 0) 548 warnx("md%d on %s: Device already " 549 "in use", mdunit, vnodefile); 550 free(vnodefile); 551 return (NULL); 552 } 553 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s", 554 _PATH_MDCONFIG, mdunit, vnodefile); 555 if (error) { 556 warnx("mdconfig (attach) error: " 557 "md%d on file=%s", mdunit, vnodefile); 558 free(vnodefile); 559 return (NULL); 560 } 561 } 562 } else /* SWAPOFF */ { 563 if (mdunit == -1) { 564 error = run_cmd(&fd, "%s -l -n -f %s", 565 _PATH_MDCONFIG, vnodefile); 566 if (error) { 567 /* md device not found. Ignore it. */ 568 close(fd); 569 if (!qflag) 570 warnx("md on %s: Device not found", 571 vnodefile); 572 free(vnodefile); 573 return (NULL); 574 } 575 sfd = fdopen(fd, "r"); 576 if (sfd == NULL) { 577 warn("mdconfig (list) fdopen error"); 578 ret = NULL; 579 goto err; 580 } 581 p = fgetln(sfd, &linelen); 582 if (p == NULL && 583 (linelen < 2 || linelen > sizeof(linebuf) - 1)) { 584 warn("mdconfig (list) unexpected output"); 585 ret = NULL; 586 goto err; 587 } 588 strncpy(linebuf, p, linelen); 589 linebuf[linelen - 1] = '\0'; 590 p = strchr(linebuf, ' '); 591 if (p != NULL) 592 *p = '\0'; 593 errno = 0; 594 ul = strtoul(linebuf, &p, 10); 595 if (errno == 0) { 596 if (*p != '\0' || ul > INT_MAX) 597 errno = EINVAL; 598 } 599 if (errno) { 600 warn("mdconfig (list) unexpected output: %s", 601 linebuf); 602 ret = NULL; 603 goto err; 604 } 605 mdunit = (int)ul; 606 } else { 607 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 608 _PATH_MDCONFIG, vnodefile, mdunit); 609 if (error) { 610 /* md device not found. Ignore it. */ 611 close(fd); 612 if (!qflag) 613 warnx("md%d on %s: Device not found", 614 mdunit, vnodefile); 615 free(vnodefile); 616 return (NULL); 617 } 618 } 619 } 620 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV, 621 MD_NAME, mdunit); 622 mdpath[sizeof(mdpath) - 1] = '\0'; 623 ret = swap_on_off_sfile(mdpath, doingall); 624 625 if (which_prog == SWAPOFF) { 626 if (ret != NULL) { 627 error = run_cmd(NULL, "%s -d -u %d", 628 _PATH_MDCONFIG, mdunit); 629 if (error) 630 warn("mdconfig (detach) detach failed: %s%s%d", 631 _PATH_DEV, MD_NAME, mdunit); 632 } 633 } 634 err: 635 if (sfd != NULL) 636 fclose(sfd); 637 if (fd != -1) 638 close(fd); 639 free(vnodefile); 640 return (ret); 641 } 642 643 static int 644 run_cmd(int *ofd, const char *cmdline, ...) 645 { 646 va_list ap; 647 char **argv, **argvp, *cmd, *p; 648 int argc, pid, status, rv; 649 int pfd[2], nfd, dup2dn; 650 651 va_start(ap, cmdline); 652 rv = vasprintf(&cmd, cmdline, ap); 653 if (rv == -1) { 654 warn("%s", __func__); 655 va_end(ap); 656 return (rv); 657 } 658 va_end(ap); 659 660 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 661 argc++; 662 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 663 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 664 if (**argvp != '\0' && (++argvp > &argv[argc])) { 665 *argvp = NULL; 666 break; 667 } 668 /* The argv array ends up NULL-terminated here. */ 669 #if 0 670 { 671 int i; 672 673 fprintf(stderr, "DEBUG: running:"); 674 /* Should be equivalent to 'cmd' (before strsep, of course). */ 675 for (i = 0; argv[i] != NULL; i++) 676 fprintf(stderr, " %s", argv[i]); 677 fprintf(stderr, "\n"); 678 } 679 #endif 680 dup2dn = 1; 681 if (ofd != NULL) { 682 if (pipe(&pfd[0]) == -1) { 683 warn("%s: pipe", __func__); 684 return (-1); 685 } 686 *ofd = pfd[0]; 687 dup2dn = 0; 688 } 689 pid = fork(); 690 switch (pid) { 691 case 0: 692 /* Child process. */ 693 if (ofd != NULL) 694 if (dup2(pfd[1], STDOUT_FILENO) < 0) 695 err(1, "dup2 in %s", __func__); 696 nfd = open(_PATH_DEVNULL, O_RDWR); 697 if (nfd == -1) 698 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 699 if (dup2(nfd, STDIN_FILENO) < 0) 700 err(1, "%s: dup2", __func__); 701 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 702 err(1, "%s: dup2", __func__); 703 if (dup2(nfd, STDERR_FILENO) < 0) 704 err(1, "%s: dup2", __func__); 705 execv(argv[0], argv); 706 warn("exec: %s", argv[0]); 707 _exit(-1); 708 case -1: 709 err(1, "%s: fork", __func__); 710 } 711 free(cmd); 712 free(argv); 713 while (waitpid(pid, &status, 0) != pid) 714 ; 715 return (WEXITSTATUS(status)); 716 } 717 718 static const char * 719 swap_on_off_sfile(const char *name, int doingall) 720 { 721 int error; 722 723 if (which_prog == SWAPON) 724 error = swapon(name); 725 else /* SWAPOFF */ 726 error = swapoff(name); 727 728 if (error == -1) { 729 switch (errno) { 730 case EBUSY: 731 if (doingall == 0) 732 warnx("%s: Device already in use", name); 733 break; 734 case EINVAL: 735 if (which_prog == SWAPON) 736 warnx("%s: NSWAPDEV limit reached", name); 737 else if (doingall == 0) 738 warn("%s", name); 739 break; 740 default: 741 warn("%s", name); 742 break; 743 } 744 return (NULL); 745 } 746 return (name); 747 } 748 749 static void 750 usage(void) 751 { 752 753 fprintf(stderr, "usage: %s ", getprogname()); 754 switch(orig_prog) { 755 case SWAPON: 756 case SWAPOFF: 757 fprintf(stderr, "[-F fstab] -aLq | file ...\n"); 758 break; 759 case SWAPCTL: 760 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 761 break; 762 } 763 exit(1); 764 } 765 766 static void 767 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 768 long blocksize) 769 { 770 char tmp[16]; 771 772 if (hflag == 'H') { 773 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 774 HN_B | HN_NOSPACE | HN_DECIMAL); 775 snprintf(buf, bufsize, "%*s", hlen, tmp); 776 } else 777 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 778 } 779 780 static void 781 swaplist(int lflag, int sflag, int hflag) 782 { 783 size_t mibsize, size; 784 struct xswdev xsw; 785 int hlen, mib[16], n, pagesize; 786 long blocksize; 787 long long total = 0; 788 long long used = 0; 789 long long tmp_total; 790 long long tmp_used; 791 char buf[32]; 792 793 pagesize = getpagesize(); 794 switch(hflag) { 795 case 'G': 796 blocksize = 1024 * 1024 * 1024; 797 strlcpy(buf, "1GB-blocks", sizeof(buf)); 798 hlen = 10; 799 break; 800 case 'H': 801 blocksize = -1; 802 strlcpy(buf, "Bytes", sizeof(buf)); 803 hlen = 10; 804 break; 805 case 'K': 806 blocksize = 1024; 807 strlcpy(buf, "1kB-blocks", sizeof(buf)); 808 hlen = 10; 809 break; 810 case 'M': 811 blocksize = 1024 * 1024; 812 strlcpy(buf, "1MB-blocks", sizeof(buf)); 813 hlen = 10; 814 break; 815 default: 816 getbsize(&hlen, &blocksize); 817 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 818 break; 819 } 820 821 mibsize = nitems(mib); 822 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 823 err(1, "sysctlnametomib()"); 824 825 if (lflag) { 826 printf("%-13s %*s %*s\n", 827 "Device:", 828 hlen, buf, 829 hlen, "Used:"); 830 } 831 832 for (n = 0; ; ++n) { 833 mib[mibsize] = n; 834 size = sizeof xsw; 835 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1) 836 break; 837 if (xsw.xsw_version != XSWDEV_VERSION) 838 errx(1, "xswdev version mismatch"); 839 840 tmp_total = (long long)xsw.xsw_nblks * pagesize; 841 tmp_used = (long long)xsw.xsw_used * pagesize; 842 total += tmp_total; 843 used += tmp_used; 844 if (lflag) { 845 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 846 blocksize); 847 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR), 848 buf); 849 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 850 blocksize); 851 printf("%s\n", buf); 852 } 853 } 854 if (errno != ENOENT) 855 err(1, "sysctl()"); 856 857 if (sflag) { 858 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 859 printf("Total: %s ", buf); 860 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 861 printf("%s\n", buf); 862 } 863 } 864 865