1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if 0 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1980, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93"; 41 #endif /* not lint */ 42 #endif 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #include <sys/param.h> 47 #include <sys/types.h> 48 #include <sys/mdioctl.h> 49 #include <sys/stat.h> 50 #include <sys/sysctl.h> 51 #include <sys/wait.h> 52 #include <vm/vm_param.h> 53 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <fnmatch.h> 58 #include <fstab.h> 59 #include <libgen.h> 60 #include <libutil.h> 61 #include <limits.h> 62 #include <paths.h> 63 #include <stdarg.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 69 static void usage(void); 70 static const char *swap_on_off(const char *, int, char *); 71 static const char *swap_on_off_gbde(const char *, int); 72 static const char *swap_on_off_geli(const char *, char *, int); 73 static const char *swap_on_off_md(const char *, char *, int); 74 static const char *swap_on_off_sfile(const char *, int); 75 static void swaplist(int, int, int); 76 static int run_cmd(int *, const char *, ...) __printflike(2, 3); 77 78 static enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; 79 80 static int qflag; 81 82 int 83 main(int argc, char **argv) 84 { 85 struct fstab *fsp; 86 const char *swfile; 87 char *ptr; 88 int ret, ch, doall; 89 int sflag, lflag, late, hflag; 90 const char *etc_fstab; 91 92 sflag = lflag = late = hflag = 0; 93 if ((ptr = strrchr(argv[0], '/')) == NULL) 94 ptr = argv[0]; 95 if (strstr(ptr, "swapon") != NULL) 96 which_prog = SWAPON; 97 else if (strstr(ptr, "swapoff") != NULL) 98 which_prog = SWAPOFF; 99 orig_prog = which_prog; 100 101 doall = 0; 102 etc_fstab = NULL; 103 while ((ch = getopt(argc, argv, "AadghklLmqsUF:")) != -1) { 104 switch(ch) { 105 case 'A': 106 if (which_prog == SWAPCTL) { 107 doall = 1; 108 which_prog = SWAPON; 109 } else 110 usage(); 111 break; 112 case 'a': 113 if (which_prog == SWAPON || which_prog == SWAPOFF) 114 doall = 1; 115 else 116 which_prog = SWAPON; 117 break; 118 case 'd': 119 if (which_prog == SWAPCTL) 120 which_prog = SWAPOFF; 121 else 122 usage(); 123 break; 124 case 'g': 125 hflag = 'G'; 126 break; 127 case 'h': 128 hflag = 'H'; 129 break; 130 case 'k': 131 hflag = 'K'; 132 break; 133 case 'l': 134 lflag = 1; 135 break; 136 case 'L': 137 late = 1; 138 break; 139 case 'm': 140 hflag = 'M'; 141 break; 142 case 'q': 143 if (which_prog == SWAPON || which_prog == SWAPOFF) 144 qflag = 1; 145 break; 146 case 's': 147 sflag = 1; 148 break; 149 case 'U': 150 if (which_prog == SWAPCTL) { 151 doall = 1; 152 which_prog = SWAPOFF; 153 } else 154 usage(); 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) != 0) 174 continue; 175 if (strstr(fsp->fs_mntops, "noauto") != NULL) 176 continue; 177 if (which_prog != SWAPOFF && 178 strstr(fsp->fs_mntops, "late") && 179 late == 0) 180 continue; 181 if (which_prog == SWAPOFF && 182 strstr(fsp->fs_mntops, "late") == NULL && 183 late != 0) 184 continue; 185 swfile = swap_on_off(fsp->fs_spec, 1, 186 fsp->fs_mntops); 187 if (swfile == NULL) { 188 ret = 1; 189 continue; 190 } 191 if (qflag == 0) { 192 printf("%s: %sing %s as swap device\n", 193 getprogname(), 194 (which_prog == SWAPOFF) ? 195 "remov" : "add", swfile); 196 } 197 } 198 } else if (*argv == NULL) 199 usage(); 200 for (; *argv; ++argv) { 201 swfile = swap_on_off(*argv, 0, NULL); 202 if (swfile == NULL) { 203 ret = 1; 204 continue; 205 } 206 if (orig_prog == SWAPCTL) { 207 printf("%s: %sing %s as swap device\n", 208 getprogname(), 209 (which_prog == SWAPOFF) ? "remov" : "add", 210 swfile); 211 } 212 } 213 } else { 214 if (lflag || sflag) 215 swaplist(lflag, sflag, hflag); 216 else 217 usage(); 218 } 219 exit(ret); 220 } 221 222 static const char * 223 swap_on_off(const char *name, int doingall, char *mntops) 224 { 225 char *base, *basebuf; 226 227 /* Swap on vnode-backed md(4) device. */ 228 if (mntops != NULL && 229 (fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 || 230 fnmatch(MD_NAME "[0-9]*", name, 0) == 0 || 231 strncmp(_PATH_DEV MD_NAME, name, 232 sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 || 233 strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0)) 234 return (swap_on_off_md(name, mntops, doingall)); 235 236 basebuf = strdup(name); 237 base = basename(basebuf); 238 239 /* Swap on encrypted device by GEOM_BDE. */ 240 if (fnmatch("*.bde", base, 0) == 0) { 241 free(basebuf); 242 return (swap_on_off_gbde(name, doingall)); 243 } 244 245 /* Swap on encrypted device by GEOM_ELI. */ 246 if (fnmatch("*.eli", base, 0) == 0) { 247 free(basebuf); 248 return (swap_on_off_geli(name, mntops, doingall)); 249 } 250 251 /* Swap on special file. */ 252 free(basebuf); 253 return (swap_on_off_sfile(name, doingall)); 254 } 255 256 /* Strip off .bde or .eli suffix from swap device name */ 257 static char * 258 swap_basename(const char *name) 259 { 260 char *dname, *p; 261 262 dname = strdup(name); 263 p = strrchr(dname, '.'); 264 /* assert(p != NULL); */ 265 *p = '\0'; 266 267 return (dname); 268 } 269 270 static const char * 271 swap_on_off_gbde(const char *name, int doingall) 272 { 273 const char *ret; 274 char pass[64 * 2 + 1]; 275 unsigned char bpass[64]; 276 char *dname; 277 int i, error; 278 279 dname = swap_basename(name); 280 if (dname == NULL) 281 return (NULL); 282 283 if (which_prog == SWAPON) { 284 arc4random_buf(bpass, sizeof(bpass)); 285 for (i = 0; i < (int)sizeof(bpass); i++) 286 sprintf(&pass[2 * i], "%02x", bpass[i]); 287 pass[sizeof(pass) - 1] = '\0'; 288 289 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE, 290 dname, pass); 291 if (error) { 292 /* bde device found. Ignore it. */ 293 free(dname); 294 if (qflag == 0) 295 warnx("%s: Device already in use", name); 296 return (NULL); 297 } 298 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE, 299 dname, pass); 300 free(dname); 301 if (error) { 302 warnx("gbde (attach) error: %s", name); 303 return (NULL); 304 } 305 } 306 307 ret = swap_on_off_sfile(name, doingall); 308 309 if (which_prog == SWAPOFF) { 310 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname); 311 free(dname); 312 if (error) { 313 /* bde device not found. Ignore it. */ 314 if (qflag == 0) 315 warnx("%s: Device not found", name); 316 return (NULL); 317 } 318 } 319 320 return (ret); 321 } 322 323 /* Build geli(8) arguments from mntops */ 324 static char * 325 swap_on_geli_args(const char *mntops) 326 { 327 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str; 328 const char *aflag, *eflag, *lflag, *Tflag, *sflag; 329 char *p, *args, *token, *string, *ops; 330 int pagesize; 331 size_t pagesize_len; 332 u_long ul; 333 334 /* Use built-in defaults for geli(8). */ 335 aalgo = ealgo = keylen_str = ""; 336 aflag = eflag = lflag = Tflag = ""; 337 338 /* We will always specify sectorsize. */ 339 sflag = " -s "; 340 sectorsize_str = NULL; 341 342 if (mntops != NULL) { 343 string = ops = strdup(mntops); 344 345 while ((token = strsep(&string, ",")) != NULL) { 346 if ((p = strstr(token, "aalgo=")) == token) { 347 aalgo = p + sizeof("aalgo=") - 1; 348 aflag = " -a "; 349 } else if ((p = strstr(token, "ealgo=")) == token) { 350 ealgo = p + sizeof("ealgo=") - 1; 351 eflag = " -e "; 352 } else if ((p = strstr(token, "keylen=")) == token) { 353 keylen_str = p + sizeof("keylen=") - 1; 354 errno = 0; 355 ul = strtoul(keylen_str, &p, 10); 356 if (errno == 0) { 357 if (*p != '\0' || ul > INT_MAX) 358 errno = EINVAL; 359 } 360 if (errno) { 361 warn("Invalid keylen: %s", keylen_str); 362 free(ops); 363 return (NULL); 364 } 365 lflag = " -l "; 366 } else if ((p = strstr(token, "sectorsize=")) == token) { 367 sectorsize_str = p + sizeof("sectorsize=") - 1; 368 errno = 0; 369 ul = strtoul(sectorsize_str, &p, 10); 370 if (errno == 0) { 371 if (*p != '\0' || ul > INT_MAX) 372 errno = EINVAL; 373 } 374 if (errno) { 375 warn("Invalid sectorsize: %s", 376 sectorsize_str); 377 free(ops); 378 return (NULL); 379 } 380 } else if (strcmp(token, "notrim") == 0) { 381 Tflag = " -T "; 382 } else if (strcmp(token, "late") == 0) { 383 /* ignore known option */ 384 } else if (strcmp(token, "noauto") == 0) { 385 /* ignore known option */ 386 } else if (strcmp(token, "sw") != 0) { 387 warnx("Invalid option: %s", token); 388 free(ops); 389 return (NULL); 390 } 391 } 392 } else 393 ops = NULL; 394 395 /* 396 * If we do not have a sector size at this point, fill in 397 * pagesize as sector size. 398 */ 399 if (sectorsize_str == NULL) { 400 /* Use pagesize as default sectorsize. */ 401 pagesize = getpagesize(); 402 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1; 403 p = alloca(pagesize_len); 404 snprintf(p, pagesize_len, "%d", pagesize); 405 sectorsize_str = p; 406 } 407 408 (void)asprintf(&args, "%s%s%s%s%s%s%s%s%s -d", 409 aflag, aalgo, eflag, ealgo, lflag, keylen_str, Tflag, 410 sflag, sectorsize_str); 411 412 free(ops); 413 return (args); 414 } 415 416 static const char * 417 swap_on_off_geli(const char *name, char *mntops, int doingall) 418 { 419 struct stat sb; 420 char *dname, *args; 421 int error; 422 423 error = stat(name, &sb); 424 425 if (which_prog == SWAPON) do { 426 /* Skip if the .eli device already exists. */ 427 if (error == 0) 428 break; 429 430 args = swap_on_geli_args(mntops); 431 if (args == NULL) 432 return (NULL); 433 434 dname = swap_basename(name); 435 if (dname == NULL) { 436 free(args); 437 return (NULL); 438 } 439 440 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args, 441 dname); 442 443 free(dname); 444 free(args); 445 446 if (error) { 447 /* error occurred during creation. */ 448 if (qflag == 0) 449 warnx("%s: Invalid parameters", name); 450 return (NULL); 451 } 452 } while (0); 453 454 return (swap_on_off_sfile(name, doingall)); 455 } 456 457 static const char * 458 swap_on_off_md(const char *name, char *mntops, int doingall) 459 { 460 FILE *sfd; 461 int fd, mdunit, error; 462 const char *ret; 463 static char mdpath[PATH_MAX], linebuf[PATH_MAX]; 464 char *p, *vnodefile; 465 size_t linelen; 466 u_long ul; 467 468 fd = -1; 469 sfd = NULL; 470 if (strlen(name) == (sizeof(MD_NAME) - 1)) 471 mdunit = -1; 472 else { 473 errno = 0; 474 ul = strtoul(name + 2, &p, 10); 475 if (errno == 0) { 476 if (*p != '\0' || ul > INT_MAX) 477 errno = EINVAL; 478 } 479 if (errno) { 480 warn("Bad device unit: %s", name); 481 return (NULL); 482 } 483 mdunit = (int)ul; 484 } 485 486 vnodefile = NULL; 487 if ((p = strstr(mntops, "file=")) != NULL) { 488 vnodefile = strdup(p + sizeof("file=") - 1); 489 p = strchr(vnodefile, ','); 490 if (p != NULL) 491 *p = '\0'; 492 } 493 if (vnodefile == NULL) { 494 warnx("file option not found for %s", name); 495 return (NULL); 496 } 497 498 if (which_prog == SWAPON) { 499 if (mdunit == -1) { 500 error = run_cmd(&fd, "%s -l -n -f %s", 501 _PATH_MDCONFIG, vnodefile); 502 if (error == 0) { 503 /* md device found. Ignore it. */ 504 close(fd); 505 if (!qflag) 506 warnx("%s: Device already in use", 507 vnodefile); 508 free(vnodefile); 509 return (NULL); 510 } 511 error = run_cmd(&fd, "%s -a -t vnode -n -f %s", 512 _PATH_MDCONFIG, vnodefile); 513 if (error) { 514 warnx("mdconfig (attach) error: file=%s", 515 vnodefile); 516 free(vnodefile); 517 return (NULL); 518 } 519 sfd = fdopen(fd, "r"); 520 if (sfd == NULL) { 521 warn("mdconfig (attach) fdopen error"); 522 ret = NULL; 523 goto err; 524 } 525 p = fgetln(sfd, &linelen); 526 if (p == NULL && 527 (linelen < 2 || linelen > sizeof(linebuf))) { 528 warn("mdconfig (attach) unexpected output"); 529 ret = NULL; 530 goto err; 531 } 532 strncpy(linebuf, p, linelen); 533 linebuf[linelen - 1] = '\0'; 534 errno = 0; 535 ul = strtoul(linebuf, &p, 10); 536 if (errno == 0) { 537 if (*p != '\0' || ul > INT_MAX) 538 errno = EINVAL; 539 } 540 if (errno) { 541 warn("mdconfig (attach) unexpected output: %s", 542 linebuf); 543 ret = NULL; 544 goto err; 545 } 546 mdunit = (int)ul; 547 } else { 548 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 549 _PATH_MDCONFIG, vnodefile, mdunit); 550 if (error == 0) { 551 /* md device found. Ignore it. */ 552 close(fd); 553 if (qflag == 0) 554 warnx("md%d on %s: Device already " 555 "in use", mdunit, vnodefile); 556 free(vnodefile); 557 return (NULL); 558 } 559 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s", 560 _PATH_MDCONFIG, mdunit, vnodefile); 561 if (error) { 562 warnx("mdconfig (attach) error: " 563 "md%d on file=%s", mdunit, vnodefile); 564 free(vnodefile); 565 return (NULL); 566 } 567 } 568 } else /* SWAPOFF */ { 569 if (mdunit == -1) { 570 error = run_cmd(&fd, "%s -l -n -f %s", 571 _PATH_MDCONFIG, vnodefile); 572 if (error) { 573 /* md device not found. Ignore it. */ 574 close(fd); 575 if (!qflag) 576 warnx("md on %s: Device not found", 577 vnodefile); 578 free(vnodefile); 579 return (NULL); 580 } 581 sfd = fdopen(fd, "r"); 582 if (sfd == NULL) { 583 warn("mdconfig (list) fdopen error"); 584 ret = NULL; 585 goto err; 586 } 587 p = fgetln(sfd, &linelen); 588 if (p == NULL && 589 (linelen < 2 || linelen > sizeof(linebuf) - 1)) { 590 warn("mdconfig (list) unexpected output"); 591 ret = NULL; 592 goto err; 593 } 594 strncpy(linebuf, p, linelen); 595 linebuf[linelen - 1] = '\0'; 596 p = strchr(linebuf, ' '); 597 if (p != NULL) 598 *p = '\0'; 599 errno = 0; 600 ul = strtoul(linebuf, &p, 10); 601 if (errno == 0) { 602 if (*p != '\0' || ul > INT_MAX) 603 errno = EINVAL; 604 } 605 if (errno) { 606 warn("mdconfig (list) unexpected output: %s", 607 linebuf); 608 ret = NULL; 609 goto err; 610 } 611 mdunit = (int)ul; 612 } else { 613 error = run_cmd(&fd, "%s -l -n -f %s -u %d", 614 _PATH_MDCONFIG, vnodefile, mdunit); 615 if (error) { 616 /* md device not found. Ignore it. */ 617 close(fd); 618 if (!qflag) 619 warnx("md%d on %s: Device not found", 620 mdunit, vnodefile); 621 free(vnodefile); 622 return (NULL); 623 } 624 } 625 } 626 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV, 627 MD_NAME, mdunit); 628 mdpath[sizeof(mdpath) - 1] = '\0'; 629 ret = swap_on_off_sfile(mdpath, doingall); 630 631 if (which_prog == SWAPOFF) { 632 if (ret != NULL) { 633 error = run_cmd(NULL, "%s -d -u %d", 634 _PATH_MDCONFIG, mdunit); 635 if (error) 636 warn("mdconfig (detach) detach failed: %s%s%d", 637 _PATH_DEV, MD_NAME, mdunit); 638 } 639 } 640 err: 641 if (sfd != NULL) 642 fclose(sfd); 643 if (fd != -1) 644 close(fd); 645 free(vnodefile); 646 return (ret); 647 } 648 649 static int 650 run_cmd(int *ofd, const char *cmdline, ...) 651 { 652 va_list ap; 653 char **argv, **argvp, *cmd, *p; 654 int argc, pid, status, rv; 655 int pfd[2], nfd, dup2dn; 656 657 va_start(ap, cmdline); 658 rv = vasprintf(&cmd, cmdline, ap); 659 if (rv == -1) { 660 warn("%s", __func__); 661 va_end(ap); 662 return (rv); 663 } 664 va_end(ap); 665 666 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++) 667 argc++; 668 argv = (char **)malloc(sizeof(*argv) * (argc + 1)); 669 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;) 670 if (**argvp != '\0' && (++argvp > &argv[argc])) { 671 *argvp = NULL; 672 break; 673 } 674 /* The argv array ends up NULL-terminated here. */ 675 #if 0 676 { 677 int i; 678 679 fprintf(stderr, "DEBUG: running:"); 680 /* Should be equivalent to 'cmd' (before strsep, of course). */ 681 for (i = 0; argv[i] != NULL; i++) 682 fprintf(stderr, " %s", argv[i]); 683 fprintf(stderr, "\n"); 684 } 685 #endif 686 dup2dn = 1; 687 if (ofd != NULL) { 688 if (pipe(&pfd[0]) == -1) { 689 warn("%s: pipe", __func__); 690 return (-1); 691 } 692 *ofd = pfd[0]; 693 dup2dn = 0; 694 } 695 pid = fork(); 696 switch (pid) { 697 case 0: 698 /* Child process. */ 699 if (ofd != NULL) 700 if (dup2(pfd[1], STDOUT_FILENO) < 0) 701 err(1, "dup2 in %s", __func__); 702 nfd = open(_PATH_DEVNULL, O_RDWR); 703 if (nfd == -1) 704 err(1, "%s: open %s", __func__, _PATH_DEVNULL); 705 if (dup2(nfd, STDIN_FILENO) < 0) 706 err(1, "%s: dup2", __func__); 707 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0) 708 err(1, "%s: dup2", __func__); 709 if (dup2(nfd, STDERR_FILENO) < 0) 710 err(1, "%s: dup2", __func__); 711 execv(argv[0], argv); 712 warn("exec: %s", argv[0]); 713 _exit(-1); 714 case -1: 715 err(1, "%s: fork", __func__); 716 } 717 free(cmd); 718 free(argv); 719 while (waitpid(pid, &status, 0) != pid) 720 ; 721 return (WEXITSTATUS(status)); 722 } 723 724 static const char * 725 swap_on_off_sfile(const char *name, int doingall) 726 { 727 int error; 728 729 if (which_prog == SWAPON) 730 error = swapon(name); 731 else /* SWAPOFF */ 732 error = swapoff(name); 733 734 if (error == -1) { 735 switch (errno) { 736 case EBUSY: 737 if (doingall == 0) 738 warnx("%s: Device already in use", name); 739 break; 740 case EINVAL: 741 if (which_prog == SWAPON) 742 warnx("%s: NSWAPDEV limit reached", name); 743 else if (doingall == 0) 744 warn("%s", name); 745 break; 746 default: 747 warn("%s", name); 748 break; 749 } 750 return (NULL); 751 } 752 return (name); 753 } 754 755 static void 756 usage(void) 757 { 758 759 fprintf(stderr, "usage: %s ", getprogname()); 760 switch(orig_prog) { 761 case SWAPON: 762 case SWAPOFF: 763 fprintf(stderr, "[-F fstab] -aLq | file ...\n"); 764 break; 765 case SWAPCTL: 766 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n"); 767 break; 768 } 769 exit(1); 770 } 771 772 static void 773 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 774 long blocksize) 775 { 776 char tmp[16]; 777 778 if (hflag == 'H') { 779 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 780 HN_B | HN_NOSPACE | HN_DECIMAL); 781 snprintf(buf, bufsize, "%*s", hlen, tmp); 782 } else 783 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 784 } 785 786 static void 787 swaplist(int lflag, int sflag, int hflag) 788 { 789 size_t mibsize, size; 790 struct xswdev xsw; 791 int hlen, mib[16], n, pagesize; 792 long blocksize; 793 long long total = 0; 794 long long used = 0; 795 long long tmp_total; 796 long long tmp_used; 797 char buf[32]; 798 799 pagesize = getpagesize(); 800 switch(hflag) { 801 case 'G': 802 blocksize = 1024 * 1024 * 1024; 803 strlcpy(buf, "1GB-blocks", sizeof(buf)); 804 hlen = 10; 805 break; 806 case 'H': 807 blocksize = -1; 808 strlcpy(buf, "Bytes", sizeof(buf)); 809 hlen = 10; 810 break; 811 case 'K': 812 blocksize = 1024; 813 strlcpy(buf, "1kB-blocks", sizeof(buf)); 814 hlen = 10; 815 break; 816 case 'M': 817 blocksize = 1024 * 1024; 818 strlcpy(buf, "1MB-blocks", sizeof(buf)); 819 hlen = 10; 820 break; 821 default: 822 getbsize(&hlen, &blocksize); 823 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 824 break; 825 } 826 827 mibsize = nitems(mib); 828 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1) 829 err(1, "sysctlnametomib()"); 830 831 if (lflag) { 832 printf("%-13s %*s %*s\n", 833 "Device:", 834 hlen, buf, 835 hlen, "Used:"); 836 } 837 838 for (n = 0; ; ++n) { 839 mib[mibsize] = n; 840 size = sizeof xsw; 841 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1) 842 break; 843 if (xsw.xsw_version != XSWDEV_VERSION) 844 errx(1, "xswdev version mismatch"); 845 846 tmp_total = (long long)xsw.xsw_nblks * pagesize; 847 tmp_used = (long long)xsw.xsw_used * pagesize; 848 total += tmp_total; 849 used += tmp_used; 850 if (lflag) { 851 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 852 blocksize); 853 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR), 854 buf); 855 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 856 blocksize); 857 printf("%s\n", buf); 858 } 859 } 860 if (errno != ENOENT) 861 err(1, "sysctl()"); 862 863 if (sflag) { 864 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 865 printf("Total: %s ", buf); 866 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 867 printf("%s\n", buf); 868 } 869 } 870 871