newfs.c revision 1.82
1 /* $NetBSD: newfs.c,v 1.82 2004/04/21 01:05:33 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1993, 1994 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 /* 33 * Copyright (c) 2002 Networks Associates Technology, Inc. 34 * All rights reserved. 35 * 36 * This software was developed for the FreeBSD Project by Marshall 37 * Kirk McKusick and Network Associates Laboratories, the Security 38 * Research Division of Network Associates, Inc. under DARPA/SPAWAR 39 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 40 * research program 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #include <sys/cdefs.h> 72 #ifndef lint 73 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1993, 1994\n\ 74 The Regents of the University of California. All rights reserved.\n"); 75 #endif /* not lint */ 76 77 #ifndef lint 78 #if 0 79 static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95"; 80 #else 81 __RCSID("$NetBSD: newfs.c,v 1.82 2004/04/21 01:05:33 christos Exp $"); 82 #endif 83 #endif /* not lint */ 84 85 /* 86 * newfs: friendly front end to mkfs 87 */ 88 #include <sys/param.h> 89 #include <sys/ioctl.h> 90 #include <sys/disklabel.h> 91 #include <sys/file.h> 92 #include <sys/mount.h> 93 #include <sys/sysctl.h> 94 #include <sys/wait.h> 95 96 #include <ufs/ufs/dir.h> 97 #include <ufs/ufs/dinode.h> 98 #include <ufs/ufs/ufsmount.h> 99 #include <ufs/ffs/fs.h> 100 101 #include <ctype.h> 102 #include <disktab.h> 103 #include <err.h> 104 #include <errno.h> 105 #include <grp.h> 106 #include <limits.h> 107 #include <paths.h> 108 #include <pwd.h> 109 #include <signal.h> 110 #include <stdint.h> 111 #include <stdio.h> 112 #include <stdlib.h> 113 #include <string.h> 114 #include <syslog.h> 115 #include <unistd.h> 116 #include <util.h> 117 118 #include "mntopts.h" 119 #include "dkcksum.h" 120 #include "extern.h" 121 122 struct mntopt mopts[] = { 123 MOPT_STDOPTS, 124 MOPT_ASYNC, 125 MOPT_UPDATE, 126 MOPT_GETARGS, 127 MOPT_NOATIME, 128 { NULL }, 129 }; 130 131 static struct disklabel *getdisklabel(char *, int); 132 static void rewritelabel(char *, int, struct disklabel *); 133 static gid_t mfs_group(const char *); 134 static uid_t mfs_user(const char *); 135 static int64_t strsuftoi64(const char *, const char *, int64_t, int64_t, int *); 136 static void usage(void); 137 int main(int, char *[]); 138 139 #define COMPAT /* allow non-labeled disks */ 140 141 /* 142 * The following two constants set the default block and fragment sizes. 143 * Both constants must be a power of 2 and meet the following constraints: 144 * MINBSIZE <= DESBLKSIZE <= MAXBSIZE 145 * sectorsize <= DESFRAGSIZE <= DESBLKSIZE 146 * DESBLKSIZE / DESFRAGSIZE <= 8 147 */ 148 /* 149 * For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults, 150 * otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use 151 * L_DFL_*. 152 */ 153 #define SMALL_FSSIZE (20*1024*2) 154 #define S_DFL_FRAGSIZE 512 155 #define MEDIUM_FSSIZE (1000*1024*2) 156 #define M_DFL_FRAGSIZE 1024 157 #define L_DFL_FRAGSIZE 2048 158 #define DFL_FRAG_BLK 8 159 160 /* Apple requires the fragment size to be at least APPLEUFS_DIRBLKSIZ 161 * but the block size cannot be larger than Darwin's PAGE_SIZE. See 162 * the mount check in Darwin's ffs_mountfs for an explanation. 163 */ 164 #define APPLEUFS_DFL_FRAGSIZE APPLEUFS_DIRBLKSIZ /* 1024 */ 165 #define APPLEUFS_DFL_BLKSIZE 4096 /* default Darwin PAGE_SIZE */ 166 167 /* 168 * Default sector size. 169 */ 170 #define DFL_SECSIZE 512 171 172 /* 173 * MAXBLKPG determines the maximum number of data blocks which are 174 * placed in a single cylinder group. The default is one indirect 175 * block worth of data blocks. 176 */ 177 #define MAXBLKPG_UFS1(bsize) ((bsize) / sizeof(int32_t)) 178 #define MAXBLKPG_UFS2(bsize) ((bsize) / sizeof(int64_t)) 179 180 /* 181 * Each file system has a number of inodes statically allocated. 182 * We allocate one inode slot per NFPI fragments, expecting this 183 * to be far more than we will ever need. 184 */ 185 #define NFPI 4 186 187 188 int mfs; /* run as the memory based filesystem */ 189 int Nflag; /* run without writing file system */ 190 int Oflag = 1; /* format as an 4.3BSD file system */ 191 int64_t fssize; /* file system size */ 192 int sectorsize; /* bytes/sector */ 193 int fsize = 0; /* fragment size */ 194 int bsize = 0; /* block size */ 195 int maxbsize = 0; /* maximum clustering */ 196 int minfree = MINFREE; /* free space threshold */ 197 int opt = DEFAULTOPT; /* optimization preference (space or time) */ 198 int density; /* number of bytes per inode */ 199 int num_inodes; /* number of inoder (overrides density) */ 200 int maxcontig = 0; /* max contiguous blocks to allocate */ 201 int maxbpg; /* maximum blocks per file in a cyl group */ 202 int avgfilesize = AVFILESIZ;/* expected average file size */ 203 int avgfpdir = AFPDIR; /* expected number of files per directory */ 204 int mntflags = MNT_ASYNC; /* flags to be passed to mount */ 205 u_long memleft; /* virtual memory available */ 206 caddr_t membase; /* start address of memory based filesystem */ 207 int needswap; /* Filesystem not in native byte order */ 208 #ifdef COMPAT 209 char *disktype; 210 int unlabeled; 211 #endif 212 char *appleufs_volname = 0; /* Apple UFS volume name */ 213 int isappleufs = 0; 214 215 char device[MAXPATHLEN]; 216 217 int 218 main(int argc, char *argv[]) 219 { 220 struct partition *pp = NULL; 221 struct disklabel *lp = NULL; 222 struct partition oldpartition; 223 struct statvfs *mp; 224 struct stat sb; 225 int ch, fsi, fso, len, n, Fflag, Iflag, Zflag; 226 uint ptn = 0; /* gcc -Wuninitialised */ 227 char *cp, *s1, *s2, *special; 228 const char *opstring; 229 int byte_sized = 0; 230 #ifdef MFS 231 struct mfs_args args; 232 char mountfromname[100]; 233 pid_t pid, res; 234 struct statvfs sf; 235 int status; 236 #endif 237 mode_t mfsmode = 01777; /* default mode for a /tmp-type directory */ 238 uid_t mfsuid = 0; /* user root */ 239 gid_t mfsgid = 0; /* group wheel */ 240 241 cp = NULL; 242 fsi = fso = -1; 243 Fflag = Iflag = Zflag = 0; 244 if (strstr(getprogname(), "mfs")) { 245 mfs = 1; 246 } else { 247 /* Undocumented, for ease of testing */ 248 if (argv[1] != NULL && !strcmp(argv[1], "-mfs")) { 249 argv++; 250 argc--; 251 mfs = 1; 252 } 253 } 254 255 opstring = mfs ? 256 "NT:a:b:c:d:e:f:g:h:i:m:n:o:p:s:u:" : 257 "B:FINO:S:T:Za:b:c:d:e:f:g:h:i:l:m:n:o:p:r:s:u:v:"; 258 while ((ch = getopt(argc, argv, opstring)) != -1) 259 switch (ch) { 260 case 'B': 261 if (strcmp(optarg, "be") == 0) { 262 #if BYTE_ORDER == LITTLE_ENDIAN 263 needswap = 1; 264 #endif 265 } else if (strcmp(optarg, "le") == 0) { 266 #if BYTE_ORDER == BIG_ENDIAN 267 needswap = 1; 268 #endif 269 } else 270 usage(); 271 break; 272 case 'F': 273 Fflag = 1; 274 break; 275 case 'I': 276 Iflag = 1; 277 break; 278 case 'N': 279 Nflag = 1; 280 break; 281 case 'O': 282 Oflag = strsuftoi64("format", optarg, 0, 2, NULL); 283 break; 284 case 'S': 285 sectorsize = strsuftoi64("sector size", 286 optarg, 1, INT_MAX, NULL); 287 break; 288 #ifdef COMPAT 289 case 'T': 290 disktype = optarg; 291 break; 292 #endif 293 case 'Z': 294 Zflag = 1; 295 break; 296 case 'a': 297 maxcontig = strsuftoi64("maximum contiguous blocks", 298 optarg, 1, INT_MAX, NULL); 299 break; 300 case 'b': 301 bsize = strsuftoi64("block size", 302 optarg, MINBSIZE, MAXBSIZE, NULL); 303 break; 304 case 'c': /* was cylinders per group... */ 305 break; 306 case 'd': 307 maxbsize = strsuftoi64("maximum extent size", 308 optarg, 0, INT_MAX, NULL); 309 break; 310 case 'e': 311 maxbpg = strsuftoi64( 312 "blocks per file in a cylinder group", 313 optarg, 1, INT_MAX, NULL); 314 break; 315 case 'f': 316 fsize = strsuftoi64("fragment size", 317 optarg, 1, MAXBSIZE, NULL); 318 break; 319 case 'g': 320 if (mfs) 321 mfsgid = mfs_group(optarg); 322 else { 323 avgfilesize = strsuftoi64("average file size", 324 optarg, 1, INT_MAX, NULL); 325 } 326 break; 327 case 'h': 328 avgfpdir = strsuftoi64("expected files per directory", 329 optarg, 1, INT_MAX, NULL); 330 break; 331 case 'i': 332 density = strsuftoi64("bytes per inode", 333 optarg, 1, INT_MAX, NULL); 334 break; 335 case 'm': 336 minfree = strsuftoi64("free space %", 337 optarg, 0, 99, NULL); 338 break; 339 case 'n': 340 num_inodes = strsuftoi64("number of inodes", 341 optarg, 1, INT_MAX, NULL); 342 break; 343 case 'o': 344 if (mfs) 345 getmntopts(optarg, mopts, &mntflags, 0); 346 else { 347 if (strcmp(optarg, "space") == 0) 348 opt = FS_OPTSPACE; 349 else if (strcmp(optarg, "time") == 0) 350 opt = FS_OPTTIME; 351 else 352 errx(1, "%s %s", 353 "unknown optimization preference: ", 354 "use `space' or `time'."); 355 } 356 break; 357 case 'p': 358 if (mfs) { 359 if ((mfsmode = strtol(optarg, NULL, 8)) <= 0) 360 errx(1, "bad mode `%s'", optarg); 361 } else 362 errx(1, "unknown option 'p'"); 363 break; 364 case 's': 365 fssize = strsuftoi64("file system size", 366 optarg, INT64_MIN, INT64_MAX, &byte_sized); 367 break; 368 case 'u': 369 if (mfs) 370 mfsuid = mfs_user(optarg); 371 else 372 errx(1, "deprecated option 'u'"); 373 break; 374 case 'v': 375 appleufs_volname = optarg; 376 if (strchr(appleufs_volname, ':') || strchr(appleufs_volname, '/')) 377 errx(1,"Apple UFS volume name cannot contain ':' or '/'"); 378 if (appleufs_volname[0] == '\0') 379 errx(1,"Apple UFS volume name cannot be zero length"); 380 isappleufs = 1; 381 break; 382 case '?': 383 default: 384 usage(); 385 } 386 argc -= optind; 387 argv += optind; 388 389 #ifdef MFS 390 /* This is enough to get through the correct kernel code paths */ 391 memset(&args, 0, sizeof args); 392 args.fspec = mountfromname; 393 if (mntflags & (MNT_GETARGS | MNT_UPDATE)) { 394 if (mount(MOUNT_MFS, argv[1], mntflags, &args) < 0) 395 err(1, "mount `%s' failed", argv[1]); 396 if (mntflags & MNT_GETARGS) 397 printf("base=%p, size=%ld\n", args.base, args.size); 398 exit(0); 399 } 400 #endif 401 402 if (argc != 2 && (mfs || argc != 1)) 403 usage(); 404 405 memset(&oldpartition, 0, sizeof oldpartition); 406 memset(&sb, 0, sizeof sb); 407 special = argv[0]; 408 if (Fflag || mfs) { 409 /* 410 * It's a file system image or an MFS, 411 * no label, use fixed default for sectorsize. 412 */ 413 if (sectorsize == 0) 414 sectorsize = DFL_SECSIZE; 415 416 if (mfs) { 417 /* Default filesystem size to that of supplied device */ 418 if (fssize == 0) 419 stat(special, &sb); 420 } else { 421 /* creating image in a regular file */ 422 int fl; 423 if (Nflag) 424 fl = O_RDONLY; 425 else { 426 if (fssize > 0) 427 fl = O_RDWR | O_CREAT; 428 else 429 fl = O_RDWR; 430 } 431 fsi = open(special, fl, 0777); 432 if (fsi == -1) 433 err(1, "can't open file %s", special); 434 if (fstat(fsi, &sb) == -1) 435 err(1, "can't fstat opened %s", special); 436 if (!Nflag) 437 fso = fsi; 438 } 439 } else { /* !Fflag && !mfs */ 440 fsi = opendisk(special, O_RDONLY, device, sizeof(device), 0); 441 special = device; 442 if (fsi < 0 || fstat(fsi, &sb) == -1) 443 err(1, "%s: open for read", special); 444 445 if (!Nflag) { 446 fso = open(special, O_WRONLY, 0); 447 if (fso < 0) 448 err(1, "%s: open for write", special); 449 450 /* Bail if target special is mounted */ 451 n = getmntinfo(&mp, MNT_NOWAIT); 452 if (n == 0) 453 err(1, "%s: getmntinfo", special); 454 455 len = sizeof(_PATH_DEV) - 1; 456 s1 = special; 457 if (strncmp(_PATH_DEV, s1, len) == 0) 458 s1 += len; 459 460 while (--n >= 0) { 461 s2 = mp->f_mntfromname; 462 if (strncmp(_PATH_DEV, s2, len) == 0) { 463 s2 += len - 1; 464 *s2 = 'r'; 465 } 466 if (strcmp(s1, s2) == 0 || 467 strcmp(s1, &s2[1]) == 0) 468 errx(1, "%s is mounted on %s", 469 special, mp->f_mntonname); 470 ++mp; 471 } 472 } 473 474 #ifdef COMPAT 475 if (disktype == NULL) 476 disktype = argv[1]; 477 #endif 478 lp = getdisklabel(special, fsi); 479 if (sectorsize == 0) { 480 sectorsize = lp->d_secsize; 481 if (sectorsize <= 0) 482 errx(1, "no default sector size"); 483 } 484 485 ptn = strchr(special, '\0')[-1] - 'a'; 486 if (ptn < lp->d_npartitions && ptn == DISKPART(sb.st_rdev)) { 487 /* Assume partition really does match the label */ 488 pp = &lp->d_partitions[ptn]; 489 oldpartition = *pp; 490 if (pp->p_size == 0) 491 errx(1, "`%c' partition is unavailable", 492 'a' + ptn); 493 if (pp->p_fstype == FS_APPLEUFS) 494 isappleufs = 1; 495 if (!Iflag) { 496 if (isappleufs) { 497 if (pp->p_fstype != FS_APPLEUFS) 498 errx(1, "`%c' partition type is not `Apple UFS'", 'a' + ptn); 499 } else { 500 if (pp->p_fstype != FS_BSDFFS) 501 errx(1, "`%c' partition type is not `4.2BSD'", 'a' + ptn); 502 } 503 } 504 } 505 } /* !Fflag && !mfs */ 506 507 if (byte_sized) 508 fssize /= sectorsize; 509 if (fssize <= 0) { 510 if (sb.st_size != 0) 511 fssize += sb.st_size / sectorsize; 512 else 513 fssize += oldpartition.p_size; 514 if (fssize <= 0) 515 errx(1, "Unable to determine file system size"); 516 } 517 518 if (pp != NULL && fssize > pp->p_size) 519 errx(1, "maximum file system size on `%s' is %d sectors", 520 special, pp->p_size); 521 522 /* XXXLUKEM: only ftruncate() regular files ? (dsl: or at all?) */ 523 if (Fflag && fso != -1 524 && ftruncate(fso, (off_t)fssize * sectorsize) == -1) 525 err(1, "can't ftruncate %s to %" PRId64, special, fssize); 526 527 if (Zflag && fso != -1) { /* pre-zero (and de-sparce) the file */ 528 char *buf; 529 int bufsize, i; 530 off_t bufrem; 531 struct statvfs sfs; 532 533 if (fstatvfs(fso, &sfs) == -1) { 534 warn("can't fstatvfs `%s'", special); 535 bufsize = 8192; 536 } else 537 bufsize = sfs.f_iosize; 538 539 if ((buf = calloc(1, bufsize)) == NULL) 540 err(1, "can't malloc buffer of %d", 541 bufsize); 542 bufrem = fssize * sectorsize; 543 printf( 544 "Creating file system image in `%s', size %lld bytes, in %d byte chunks.\n", 545 special, (long long)bufrem, bufsize); 546 while (bufrem > 0) { 547 i = write(fso, buf, MIN(bufsize, bufrem)); 548 if (i == -1) 549 err(1, "writing image"); 550 bufrem -= i; 551 } 552 free(buf); 553 } 554 555 /* Sort out fragment and block sizes */ 556 if (fsize == 0) { 557 fsize = bsize / DFL_FRAG_BLK; 558 if (fsize == 0) 559 fsize = oldpartition.p_fsize; 560 if (fsize <= 0) { 561 if (isappleufs) { 562 fsize = APPLEUFS_DFL_FRAGSIZE; 563 } else { 564 if (fssize < SMALL_FSSIZE) 565 fsize = S_DFL_FRAGSIZE; 566 else if (fssize < MEDIUM_FSSIZE) 567 fsize = M_DFL_FRAGSIZE; 568 else 569 fsize = L_DFL_FRAGSIZE; 570 if (fsize < sectorsize) 571 fsize = sectorsize; 572 } 573 } 574 } 575 if (bsize == 0) { 576 bsize = oldpartition.p_frag * oldpartition.p_fsize; 577 if (bsize <= 0) { 578 if (isappleufs) 579 bsize = APPLEUFS_DFL_BLKSIZE; 580 else 581 bsize = DFL_FRAG_BLK * fsize; 582 } 583 } 584 585 if (isappleufs && (fsize < APPLEUFS_DFL_FRAGSIZE)) { 586 warnx("Warning: chosen fsize of %d is less than Apple UFS minimum of %d", 587 fsize, APPLEUFS_DFL_FRAGSIZE); 588 } 589 if (isappleufs && (bsize > APPLEUFS_DFL_BLKSIZE)) { 590 warnx("Warning: chosen bsize of %d is greater than Apple UFS maximum of %d", 591 bsize, APPLEUFS_DFL_BLKSIZE); 592 } 593 594 /* 595 * Maxcontig sets the default for the maximum number of blocks 596 * that may be allocated sequentially. With filesystem clustering 597 * it is possible to allocate contiguous blocks up to the maximum 598 * transfer size permitted by the controller or buffering. 599 */ 600 if (maxcontig == 0) 601 maxcontig = MAX(1, MIN(MAXPHYS, MAXBSIZE) / bsize); 602 if (density == 0) 603 density = NFPI * fsize; 604 if (minfree < MINFREE && opt != FS_OPTSPACE) { 605 warnx("%s %s %d%%", "Warning: changing optimization to space", 606 "because minfree is less than", MINFREE); 607 opt = FS_OPTSPACE; 608 } 609 if (maxbpg == 0) { 610 if (Oflag <= 1) 611 maxbpg = MAXBLKPG_UFS1(bsize); 612 else 613 maxbpg = MAXBLKPG_UFS2(bsize); 614 } 615 mkfs(pp, special, fsi, fso, mfsmode, mfsuid, mfsgid); 616 if (!Nflag && pp != NULL 617 && memcmp(pp, &oldpartition, sizeof(oldpartition))) 618 rewritelabel(special, fso, lp); 619 if (fsi != -1 && fsi != fso) 620 close(fsi); 621 if (fso != -1) 622 close(fso); 623 #ifdef MFS 624 if (mfs) { 625 626 switch (pid = fork()) { 627 case -1: 628 perror("mfs"); 629 exit(10); 630 case 0: 631 (void)snprintf(mountfromname, sizeof(mountfromname), 632 "mfs:%d", getpid()); 633 break; 634 default: 635 (void)snprintf(mountfromname, sizeof(mountfromname), 636 "mfs:%d", pid); 637 for (;;) { 638 /* 639 * spin until the mount succeeds 640 * or the child exits 641 */ 642 usleep(1); 643 644 /* 645 * XXX Here is a race condition: another process 646 * can mount a filesystem which hides our 647 * ramdisk before we see the success. 648 */ 649 if (statvfs(argv[1], &sf) < 0) 650 err(88, "statvfs %s", argv[1]); 651 if (!strcmp(sf.f_mntfromname, mountfromname) && 652 !strncmp(sf.f_mntonname, argv[1], 653 MNAMELEN) && 654 !strcmp(sf.f_fstypename, "mfs")) 655 exit(0); 656 657 res = waitpid(pid, &status, WNOHANG); 658 if (res == -1) 659 err(11, "waitpid"); 660 if (res != pid) 661 continue; 662 if (WIFEXITED(status)) { 663 if (WEXITSTATUS(status) == 0) 664 exit(0); 665 errx(1, "%s: mount: %s", argv[1], 666 strerror(WEXITSTATUS(status))); 667 } else 668 errx(11, "abnormal termination"); 669 } 670 /* NOTREACHED */ 671 } 672 673 (void) setsid(); 674 (void) close(0); 675 (void) close(1); 676 (void) close(2); 677 (void) chdir("/"); 678 679 args.export.ex_root = -2; 680 if (mntflags & MNT_RDONLY) 681 args.export.ex_flags = MNT_EXRDONLY; 682 else 683 args.export.ex_flags = 0; 684 args.base = membase; 685 args.size = fssize * sectorsize; 686 if (mount(MOUNT_MFS, argv[1], mntflags, &args) < 0) 687 exit(errno); /* parent prints message */ 688 } 689 #endif 690 exit(0); 691 } 692 693 #ifdef COMPAT 694 const char lmsg[] = "%s: can't read disk label; disk type must be specified"; 695 #else 696 const char lmsg[] = "%s: can't read disk label"; 697 #endif 698 699 static struct disklabel * 700 getdisklabel(char *s, int fd) 701 { 702 static struct disklabel lab; 703 704 #ifdef COMPAT 705 if (disktype) { 706 struct disklabel *lp; 707 708 unlabeled++; 709 lp = getdiskbyname(disktype); 710 if (lp == NULL) 711 errx(1, "%s: unknown disk type", disktype); 712 return (lp); 713 } 714 #endif 715 if (ioctl(fd, DIOCGDINFO, &lab) < 0) { 716 warn("ioctl (GDINFO)"); 717 errx(1, lmsg, s); 718 } 719 return (&lab); 720 } 721 722 static void 723 rewritelabel(char *s, int fd, struct disklabel *lp) 724 { 725 #ifdef COMPAT 726 if (unlabeled) 727 return; 728 #endif 729 lp->d_checksum = 0; 730 lp->d_checksum = dkcksum(lp); 731 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 732 if (errno == ESRCH) 733 return; 734 warn("ioctl (WDINFO)"); 735 errx(1, "%s: can't rewrite disk label", s); 736 } 737 #if __vax__ 738 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 739 int i; 740 int cfd; 741 daddr_t alt; 742 off_t loff; 743 char specname[64]; 744 char blk[1024]; 745 char *cp; 746 747 /* 748 * Make name for 'c' partition. 749 */ 750 strlcpy(specname, s, sizeof(specname)); 751 cp = specname + strlen(specname) - 1; 752 if (!isdigit(*cp)) 753 *cp = 'c'; 754 cfd = open(specname, O_WRONLY); 755 if (cfd < 0) 756 err(1, "%s: open", specname); 757 if ((loff = getlabeloffset()) < 0) 758 err(1, "getlabeloffset()"); 759 memset(blk, 0, sizeof(blk)); 760 *(struct disklabel *)(blk + loff) = *lp; 761 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 762 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 763 off_t offset; 764 765 offset = alt + i; 766 offset *= lp->d_secsize; 767 if (lseek(cfd, offset, SEEK_SET) == -1) 768 err(1, "lseek to badsector area: "); 769 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 770 warn("alternate label %d write", i/2); 771 } 772 close(cfd); 773 } 774 #endif 775 } 776 777 static gid_t 778 mfs_group(const char *gname) 779 { 780 struct group *gp; 781 782 if (!(gp = getgrnam(gname)) && !isdigit((unsigned char)*gname)) 783 errx(1, "unknown gname %s", gname); 784 return gp ? gp->gr_gid : atoi(gname); 785 } 786 787 static uid_t 788 mfs_user(const char *uname) 789 { 790 struct passwd *pp; 791 792 if (!(pp = getpwnam(uname)) && !isdigit((unsigned char)*uname)) 793 errx(1, "unknown user %s", uname); 794 return pp ? pp->pw_uid : atoi(uname); 795 } 796 797 static int64_t 798 strsuftoi64(const char *desc, const char *arg, int64_t min, int64_t max, int *num_suffix) 799 { 800 int64_t result, r1; 801 int shift = 0; 802 char *ep; 803 804 errno = 0; 805 r1 = strtoll(arg, &ep, 10); 806 if (ep[0] != '\0' && ep[1] != '\0') 807 errx(1, "%s `%s' is not a valid number.", desc, arg); 808 switch (ep[0]) { 809 case '\0': 810 case 's': case 'S': 811 if (num_suffix != NULL) 812 *num_suffix = 0; 813 break; 814 case 'g': case 'G': 815 shift += 10; 816 /* FALLTHROUGH */ 817 case 'm': case 'M': 818 shift += 10; 819 /* FALLTHROUGH */ 820 case 'k': case 'K': 821 shift += 10; 822 /* FALLTHROUGH */ 823 case 'b': case 'B': 824 if (num_suffix != NULL) 825 *num_suffix = 1; 826 break; 827 default: 828 errx(1, "`%s' is not a valid suffix for %s.", ep, desc); 829 } 830 result = r1 << shift; 831 if (errno == ERANGE || result >> shift != r1) 832 errx(1, "%s `%s' is too large to convert.", desc, arg); 833 if (result < min) 834 errx(1, "%s `%s' (%" PRId64 ") is less than the minimum (%" PRId64 ").", 835 desc, arg, result, min); 836 if (result > max) 837 errx(1, "%s `%s' (%" PRId64 ") is greater than the maximum (%" PRId64 ").", 838 desc, arg, result, max); 839 return result; 840 } 841 842 #define NEWFS 1 843 #define MFS_MOUNT 2 844 #define BOTH NEWFS | MFS_MOUNT 845 846 struct help_strings { 847 int flags; 848 const char *str; 849 } const help_strings[] = { 850 { NEWFS, "-B byteorder\tbyte order (`be' or `le')" }, 851 { NEWFS, "-F \t\tcreate file system image in regular file" }, 852 { NEWFS, "-I \t\tdo not check that the file system type is '4.2BSD'" }, 853 { BOTH, "-N \t\tdo not create file system, just print out " 854 "parameters" }, 855 { NEWFS, "-O N\t\tfilesystem format: 0 ==> 4.3BSD, 1 ==> FFS, 2 ==> UFS2" }, 856 { NEWFS, "-S secsize\tsector size" }, 857 #ifdef COMPAT 858 { NEWFS, "-T disktype\tdisk type" }, 859 #endif 860 { NEWFS, "-Z \t\tpre-zero the image file" }, 861 { BOTH, "-a maxcontig\tmaximum contiguous blocks" }, 862 { BOTH, "-b bsize\tblock size" }, 863 { BOTH, "-c blocks\tblocks per cylinder group" }, 864 { BOTH, "-d maxbsize\tmaximum extent size" }, 865 { BOTH, "-e maxbpg\tmaximum blocks per file in a cylinder group" 866 }, 867 { BOTH, "-f fsize\tfrag size" }, 868 { NEWFS, "-g avgfilesize\taverage file size" }, 869 { MFS_MOUNT, "-g groupname\tgroup name of mount point" }, 870 { BOTH, "-h avgfpdir\taverage files per directory" }, 871 { BOTH, "-i density\tnumber of bytes per inode" }, 872 { BOTH, "-m minfree\tminimum free space %%" }, 873 { BOTH, "-n inodes\tnumber of inodes (overrides -i density)" }, 874 { BOTH, "-o optim\toptimization preference (`space' or `time')" 875 }, 876 { MFS_MOUNT, "-p perm\t\tpermissions (in octal)" }, 877 { BOTH, "-s fssize\tfile system size (sectors)" }, 878 { MFS_MOUNT, "-u username\tuser name of mount point" }, 879 { NEWFS, "-v volname\tApple UFS volume name" }, 880 { 0, NULL } 881 }; 882 883 static void 884 usage(void) 885 { 886 int match; 887 const struct help_strings *hs; 888 889 if (mfs) { 890 fprintf(stderr, 891 "usage: %s [ fsoptions ] special-device mount-point\n", 892 getprogname()); 893 } else 894 fprintf(stderr, 895 "usage: %s [ fsoptions ] special-device%s\n", 896 getprogname(), 897 #ifdef COMPAT 898 " [disk-type]"); 899 #else 900 ""); 901 #endif 902 fprintf(stderr, "where fsoptions are:\n"); 903 904 match = mfs ? MFS_MOUNT : NEWFS; 905 for (hs = help_strings; hs->flags != 0; hs++) 906 if (hs->flags & match) 907 fprintf(stderr, "\t%s\n", hs->str); 908 exit(1); 909 } 910
Indexes created Mon Sep 29 21:09:56 GMT 2025