usr.bin/xinstall/xinstall.c

   1 /*
   2  * Copyright (c) 2012, 2013 SRI International
   3  * Copyright (c) 1987, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 4. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #ifndef lint
  32 static const char copyright[] =
  33 "@(#) Copyright (c) 1987, 1993\n\
  34         The Regents of the University of California.  All rights reserved.\n";
  35 #endif /* not lint */
  36
  37 #if 0
  38 #ifndef lint
  39 static char sccsid[] = "@(#)xinstall.c  8.1 (Berkeley) 7/21/93";
  40 #endif /* not lint */
  41 #endif
  42
  43 #include <sys/cdefs.h>
  44 __FBSDID("$FreeBSD$");
  45
  46 #include <sys/param.h>
  47 #include <sys/mman.h>
  48 #include <sys/mount.h>
  49 #include <sys/stat.h>
  50 #include <sys/time.h>
  51 #include <sys/wait.h>
  52
  53 #include <err.h>
  54 #include <errno.h>
  55 #include <fcntl.h>
  56 #include <grp.h>
  57 #include <libgen.h>
  58 #include <md5.h>
  59 #include <paths.h>
  60 #include <pwd.h>
  61 #include <ripemd.h>
  62 #include <sha.h>
  63 #include <sha256.h>
  64 #include <sha512.h>
  65 #include <stdint.h>
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <sysexits.h>
  70 #include <unistd.h>
  71 #include <vis.h>
  72
  73 #include "mtree.h"
  74
  75 /* Bootstrap aid - this doesn't exist in most older releases */
  76 #ifndef MAP_FAILED
  77 #define MAP_FAILED ((void *)-1) /* from <sys/mman.h> */
  78 #endif
  79
  80 #define MAX_CMP_SIZE    (16 * 1024 * 1024)
  81
  82 #define LN_ABSOLUTE     0x01
  83 #define LN_RELATIVE     0x02
  84 #define LN_HARD         0x04
  85 #define LN_SYMBOLIC     0x08
  86 #define LN_MIXED        0x10
  87
  88 #define DIRECTORY       0x01            /* Tell install it's a directory. */
  89 #define SETFLAGS        0x02            /* Tell install to set flags. */
  90 #define NOCHANGEBITS    (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
  91 #define BACKUP_SUFFIX   ".old"
  92
  93 typedef union {
  94         MD5_CTX         MD5;
  95         RIPEMD160_CTX   RIPEMD160;
  96         SHA1_CTX        SHA1;
  97         SHA256_CTX      SHA256;
  98         SHA512_CTX      SHA512;
  99 }       DIGEST_CTX;
 100
 101 static enum {
 102         DIGEST_NONE = 0,
 103         DIGEST_MD5,
 104         DIGEST_RIPEMD160,
 105         DIGEST_SHA1,
 106         DIGEST_SHA256,
 107         DIGEST_SHA512,
 108 } digesttype = DIGEST_NONE;
 109
 110 static gid_t gid;
 111 static uid_t uid;
 112 static int dobackup, docompare, dodir, dolink, dopreserve, dostrip, dounpriv,
 113     safecopy, verbose;
 114 static int haveopt_f, haveopt_g, haveopt_m, haveopt_o;
 115 static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
 116 static FILE *metafp;
 117 static const char *group, *owner;
 118 static const char *suffix = BACKUP_SUFFIX;
 119 static char *destdir, *digest, *fflags, *metafile, *tags;
 120
 121 static int      compare(int, const char *, size_t, int, const char *, size_t,
 122                     char **);
 123 static char     *copy(int, const char *, int, const char *, off_t);
 124 static int      create_newfile(const char *, int, struct stat *);
 125 static int      create_tempfile(const char *, char *, size_t);
 126 static char     *quiet_mktemp(char *template);
 127 static char     *digest_file(const char *);
 128 static void     digest_init(DIGEST_CTX *);
 129 static void     digest_update(DIGEST_CTX *, const unsigned char *, size_t);
 130 static char     *digest_end(DIGEST_CTX *, char *);
 131 static int      do_link(const char *, const char *, const struct stat *);
 132 static void     do_symlink(const char *, const char *, const struct stat *);
 133 static void     makelink(const char *, const char *, const struct stat *);
 134 static void     install(const char *, const char *, u_long, u_int);
 135 static void     install_dir(char *);
 136 static void     metadata_log(const char *, const char *, struct timeval *,
 137                     const char *, const char *, off_t);
 138 static int      parseid(const char *, id_t *);
 139 static void     strip(const char *);
 140 static int      trymmap(int);
 141 static void     usage(void);
 142
 143 int
 144 main(int argc, char *argv[])
 145 {
 146         struct stat from_sb, to_sb;
 147         mode_t *set;
 148         u_long fset;
 149         int ch, no_target;
 150         u_int iflags;
 151         char *p;
 152         const char *to_name;
 153
 154         fset = 0;
 155         iflags = 0;
 156         group = owner = NULL;
 157         while ((ch = getopt(argc, argv, "B:bCcD:df:g:h:l:M:m:N:o:pSsT:Uv")) !=
 158              -1)
 159                 switch((char)ch) {
 160                 case 'B':
 161                         suffix = optarg;
 162                         /* FALLTHROUGH */
 163                 case 'b':
 164                         dobackup = 1;
 165                         break;
 166                 case 'C':
 167                         docompare = 1;
 168                         break;
 169                 case 'c':
 170                         /* For backwards compatibility. */
 171                         break;
 172                 case 'D':
 173                         destdir = optarg;
 174                         break;
 175                 case 'd':
 176                         dodir = 1;
 177                         break;
 178                 case 'f':
 179                         haveopt_f = 1;
 180                         fflags = optarg;
 181                         break;
 182                 case 'g':
 183                         haveopt_g = 1;
 184                         group = optarg;
 185                         break;
 186                 case 'h':
 187                         digest = optarg;
 188                         break;
 189                 case 'l':
 190                         for (p = optarg; *p != '\0'; p++)
 191                                 switch (*p) {
 192                                 case 's':
 193                                         dolink &= ~(LN_HARD|LN_MIXED);
 194                                         dolink |= LN_SYMBOLIC;
 195                                         break;
 196                                 case 'h':
 197                                         dolink &= ~(LN_SYMBOLIC|LN_MIXED);
 198                                         dolink |= LN_HARD;
 199                                         break;
 200                                 case 'm':
 201                                         dolink &= ~(LN_SYMBOLIC|LN_HARD);
 202                                         dolink |= LN_MIXED;
 203                                         break;
 204                                 case 'a':
 205                                         dolink &= ~LN_RELATIVE;
 206                                         dolink |= LN_ABSOLUTE;
 207                                         break;
 208                                 case 'r':
 209                                         dolink &= ~LN_ABSOLUTE;
 210                                         dolink |= LN_RELATIVE;
 211                                         break;
 212                                 default:
 213                                         errx(1, "%c: invalid link type", *p);
 214                                         /* NOTREACHED */
 215                                 }
 216                         break;
 217                 case 'M':
 218                         metafile = optarg;
 219                         break;
 220                 case 'm':
 221                         haveopt_m = 1;
 222                         if (!(set = setmode(optarg)))
 223                                 errx(EX_USAGE, "invalid file mode: %s",
 224                                      optarg);
 225                         mode = getmode(set, 0);
 226                         free(set);
 227                         break;
 228                 case 'N':
 229                         if (!setup_getid(optarg))
 230                                 err(EX_OSERR, "Unable to use user and group "
 231                                     "databases in `%s'", optarg);
 232                         break;
 233                 case 'o':
 234                         haveopt_o = 1;
 235                         owner = optarg;
 236                         break;
 237                 case 'p':
 238                         docompare = dopreserve = 1;
 239                         break;
 240                 case 'S':
 241                         safecopy = 1;
 242                         break;
 243                 case 's':
 244                         dostrip = 1;
 245                         break;
 246                 case 'T':
 247                         tags = optarg;
 248                         break;
 249                 case 'U':
 250                         dounpriv = 1;
 251                         break;
 252                 case 'v':
 253                         verbose = 1;
 254                         break;
 255                 case '?':
 256                 default:
 257                         usage();
 258                 }
 259         argc -= optind;
 260         argv += optind;
 261
 262         /* some options make no sense when creating directories */
 263         if (dostrip && dodir) {
 264                 warnx("-d and -s may not be specified together");
 265                 usage();
 266         }
 267
 268         if (getenv("DONTSTRIP") != NULL) {
 269                 warnx("DONTSTRIP set - will not strip installed binaries");
 270                 dostrip = 0;
 271         }
 272
 273         /* must have at least two arguments, except when creating directories */
 274         if (argc == 0 || (argc == 1 && !dodir))
 275                 usage();
 276
 277         if (digest != NULL) {
 278                 if (strcmp(digest, "none") == 0) {
 279                         digesttype = DIGEST_NONE;
 280                 } else if (strcmp(digest, "md5") == 0) {
 281                        digesttype = DIGEST_MD5;
 282                 } else if (strcmp(digest, "rmd160") == 0) {
 283                         digesttype = DIGEST_RIPEMD160;
 284                 } else if (strcmp(digest, "sha1") == 0) {
 285                         digesttype = DIGEST_SHA1;
 286                 } else if (strcmp(digest, "sha256") == 0) {
 287                         digesttype = DIGEST_SHA256;
 288                 } else if (strcmp(digest, "sha512") == 0) {
 289                         digesttype = DIGEST_SHA512;
 290                 } else {
 291                         warnx("unknown digest `%s'", digest);
 292                         usage();
 293                 }
 294         }
 295
 296         /* need to make a temp copy so we can compare stripped version */
 297         if (docompare && dostrip)
 298                 safecopy = 1;
 299
 300         /* get group and owner id's */
 301         if (group != NULL && !dounpriv) {
 302                 if (gid_from_group(group, &gid) == -1) {
 303                         id_t id;
 304                         if (!parseid(group, &id))
 305                                 errx(1, "unknown group %s", group);
 306                         gid = id;
 307                 }
 308         } else
 309                 gid = (gid_t)-1;
 310
 311         if (owner != NULL && !dounpriv) {
 312                 if (uid_from_user(owner, &uid) == -1) {
 313                         id_t id;
 314                         if (!parseid(owner, &id))
 315                                 errx(1, "unknown user %s", owner);
 316                         uid = id;
 317                 }
 318         } else
 319                 uid = (uid_t)-1;
 320
 321         if (fflags != NULL && !dounpriv) {
 322                 if (strtofflags(&fflags, &fset, NULL))
 323                         errx(EX_USAGE, "%s: invalid flag", fflags);
 324                 iflags |= SETFLAGS;
 325         }
 326
 327         if (metafile != NULL) {
 328                 if ((metafp = fopen(metafile, "a")) == NULL)
 329                         warn("open %s", metafile);
 330         } else
 331                 digesttype = DIGEST_NONE;
 332
 333         if (dodir) {
 334                 for (; *argv != NULL; ++argv)
 335                         install_dir(*argv);
 336                 exit(EX_OK);
 337                 /* NOTREACHED */
 338         }
 339
 340         to_name = argv[argc - 1];
 341         no_target = stat(to_name, &to_sb);
 342         if (!no_target && S_ISDIR(to_sb.st_mode)) {
 343                 if (dolink & LN_SYMBOLIC) {
 344                         if (lstat(to_name, &to_sb) != 0)
 345                                 err(EX_OSERR, "%s vanished", to_name);
 346                         if (S_ISLNK(to_sb.st_mode)) {
 347                                 if (argc != 2) {
 348                                         errno = ENOTDIR;
 349                                         err(EX_USAGE, "%s", to_name);
 350                                 }
 351                                 install(*argv, to_name, fset, iflags);
 352                                 exit(EX_OK);
 353                         }
 354                 }
 355                 for (; *argv != to_name; ++argv)
 356                         install(*argv, to_name, fset, iflags | DIRECTORY);
 357                 exit(EX_OK);
 358                 /* NOTREACHED */
 359         }
 360
 361         /* can't do file1 file2 directory/file */
 362         if (argc != 2) {
 363                 if (no_target)
 364                         warnx("target directory `%s' does not exist",
 365                             argv[argc - 1]);
 366                 else
 367                         warnx("target `%s' is not a directory",
 368                             argv[argc - 1]);
 369                 usage();
 370         }
 371
 372         if (!no_target && !dolink) {
 373                 if (stat(*argv, &from_sb))
 374                         err(EX_OSERR, "%s", *argv);
 375                 if (!S_ISREG(to_sb.st_mode)) {
 376                         errno = EFTYPE;
 377                         err(EX_OSERR, "%s", to_name);
 378                 }
 379                 if (to_sb.st_dev == from_sb.st_dev &&
 380                     to_sb.st_ino == from_sb.st_ino)
 381                         errx(EX_USAGE,
 382                             "%s and %s are the same file", *argv, to_name);
 383         }
 384         install(*argv, to_name, fset, iflags);
 385         exit(EX_OK);
 386         /* NOTREACHED */
 387 }
 388
 389 static char *
 390 digest_file(const char *name)
 391 {
 392
 393         switch (digesttype) {
 394         case DIGEST_MD5:
 395                 return (MD5File(name, NULL));
 396         case DIGEST_RIPEMD160:
 397                 return (RIPEMD160_File(name, NULL));
 398         case DIGEST_SHA1:
 399                 return (SHA1_File(name, NULL));
 400         case DIGEST_SHA256:
 401                 return (SHA256_File(name, NULL));
 402         case DIGEST_SHA512:
 403                 return (SHA512_File(name, NULL));
 404         default:
 405                 return (NULL);
 406         }
 407 }
 408
 409 static void
 410 digest_init(DIGEST_CTX *c)
 411 {
 412
 413         switch (digesttype) {
 414         case DIGEST_NONE:
 415                 break;
 416         case DIGEST_MD5:
 417                 MD5Init(&(c->MD5));
 418                 break;
 419         case DIGEST_RIPEMD160:
 420                 RIPEMD160_Init(&(c->RIPEMD160));
 421                 break;
 422         case DIGEST_SHA1:
 423                 SHA1_Init(&(c->SHA1));
 424                 break;
 425         case DIGEST_SHA256:
 426                 SHA256_Init(&(c->SHA256));
 427                 break;
 428         case DIGEST_SHA512:
 429                 SHA512_Init(&(c->SHA512));
 430                 break;
 431         }
 432 }
 433
 434 static void
 435 digest_update(DIGEST_CTX *c, const unsigned char *data, size_t len)
 436 {
 437
 438         switch (digesttype) {
 439         case DIGEST_NONE:
 440                 break;
 441         case DIGEST_MD5:
 442                 MD5Update(&(c->MD5), data, len);
 443                 break;
 444         case DIGEST_RIPEMD160:
 445                 RIPEMD160_Update(&(c->RIPEMD160), data, len);
 446                 break;
 447         case DIGEST_SHA1:
 448                 SHA1_Update(&(c->SHA1), data, len);
 449                 break;
 450         case DIGEST_SHA256:
 451                 SHA256_Update(&(c->SHA256), data, len);
 452                 break;
 453         case DIGEST_SHA512:
 454                 SHA512_Update(&(c->SHA512), data, len);
 455                 break;
 456         }
 457 }
 458
 459 static char *
 460 digest_end(DIGEST_CTX *c, char *buf)
 461 {
 462
 463         switch (digesttype) {
 464         case DIGEST_MD5:
 465                 return (MD5End(&(c->MD5), buf));
 466         case DIGEST_RIPEMD160:
 467                 return (RIPEMD160_End(&(c->RIPEMD160), buf));
 468         case DIGEST_SHA1:
 469                 return (SHA1_End(&(c->SHA1), buf));
 470         case DIGEST_SHA256:
 471                 return (SHA256_End(&(c->SHA256), buf));
 472         case DIGEST_SHA512:
 473                 return (SHA512_End(&(c->SHA512), buf));
 474         default:
 475                 return (NULL);
 476         }
 477 }
 478
 479 /*
 480  * parseid --
 481  *      parse uid or gid from arg into id, returning non-zero if successful
 482  */
 483 static int
 484 parseid(const char *name, id_t *id)
 485 {
 486         char    *ep;
 487         errno = 0;
 488         *id = (id_t)strtoul(name, &ep, 10);
 489         if (errno || *ep != '\0')
 490                 return (0);
 491         return (1);
 492 }
 493
 494 /*
 495  * quiet_mktemp --
 496  *      mktemp implementation used mkstemp to avoid mktemp warnings.  We
 497  *      really do need mktemp semantics here as we will be creating a link.
 498  */
 499 static char *
 500 quiet_mktemp(char *template)
 501 {
 502         int fd;
 503
 504         if ((fd = mkstemp(template)) == -1)
 505                 return (NULL);
 506         close (fd);
 507         if (unlink(template) == -1)
 508                 err(EX_OSERR, "unlink %s", template);
 509         return (template);
 510 }
 511
 512 /*
 513  * do_link --
 514  *      make a hard link, obeying dorename if set
 515  *      return -1 on failure
 516  */
 517 static int
 518 do_link(const char *from_name, const char *to_name,
 519     const struct stat *target_sb)
 520 {
 521         char tmpl[MAXPATHLEN];
 522         int ret;
 523
 524         if (safecopy && target_sb != NULL) {
 525                 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
 526                 /* This usage is safe. */
 527                 if (quiet_mktemp(tmpl) == NULL)
 528                         err(EX_OSERR, "%s: mktemp", tmpl);
 529                 ret = link(from_name, tmpl);
 530                 if (ret == 0) {
 531                         if (target_sb->st_mode & S_IFDIR && rmdir(to_name) ==
 532                             -1) {
 533                                 unlink(tmpl);
 534                                 err(EX_OSERR, "%s", to_name);
 535                         }
 536                         if (target_sb->st_flags & NOCHANGEBITS)
 537                                 (void)chflags(to_name, target_sb->st_flags &
 538                                      ~NOCHANGEBITS);
 539                         if (verbose)
 540                                 printf("install: link %s -> %s\n",
 541                                     from_name, to_name);
 542                         ret = rename(tmpl, to_name);
 543                         /*
 544                          * If rename has posix semantics, then the temporary
 545                          * file may still exist when from_name and to_name point
 546                          * to the same file, so unlink it unconditionally.
 547                          */
 548                         (void)unlink(tmpl);
 549                 }
 550                 return (ret);
 551         } else {
 552                 if (verbose)
 553                         printf("install: link %s -> %s\n",
 554                             from_name, to_name);
 555                 return (link(from_name, to_name));
 556         }
 557 }
 558
 559 /*
 560  * do_symlink --
 561  *      Make a symbolic link, obeying dorename if set. Exit on failure.
 562  */
 563 static void
 564 do_symlink(const char *from_name, const char *to_name,
 565     const struct stat *target_sb)
 566 {
 567         char tmpl[MAXPATHLEN];
 568
 569         if (safecopy && target_sb != NULL) {
 570                 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
 571                 /* This usage is safe. */
 572                 if (quiet_mktemp(tmpl) == NULL)
 573                         err(EX_OSERR, "%s: mktemp", tmpl);
 574
 575                 if (symlink(from_name, tmpl) == -1)
 576                         err(EX_OSERR, "symlink %s -> %s", from_name, tmpl);
 577
 578                 if (target_sb->st_mode & S_IFDIR && rmdir(to_name) == -1) {
 579                         (void)unlink(tmpl);
 580                         err(EX_OSERR, "%s", to_name);
 581                 }
 582                 if (target_sb->st_flags & NOCHANGEBITS)
 583                         (void)chflags(to_name, target_sb->st_flags &
 584                              ~NOCHANGEBITS);
 585                 if (verbose)
 586                         printf("install: symlink %s -> %s\n",
 587                             from_name, to_name);
 588                 if (rename(tmpl, to_name) == -1) {
 589                         /* Remove temporary link before exiting. */
 590                         (void)unlink(tmpl);
 591                         err(EX_OSERR, "%s: rename", to_name);
 592                 }
 593         } else {
 594                 if (verbose)
 595                         printf("install: symlink %s -> %s\n",
 596                             from_name, to_name);
 597                 if (symlink(from_name, to_name) == -1)
 598                         err(EX_OSERR, "symlink %s -> %s", from_name, to_name);
 599         }
 600 }
 601
 602 /*
 603  * makelink --
 604  *      make a link from source to destination
 605  */
 606 static void
 607 makelink(const char *from_name, const char *to_name,
 608     const struct stat *target_sb)
 609 {
 610         char    src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN];
 611         struct stat     to_sb;
 612
 613         /* Try hard links first. */
 614         if (dolink & (LN_HARD|LN_MIXED)) {
 615                 if (do_link(from_name, to_name, target_sb) == -1) {
 616                         if ((dolink & LN_HARD) || errno != EXDEV)
 617                                 err(EX_OSERR, "link %s -> %s", from_name, to_name);
 618                 } else {
 619                         if (stat(to_name, &to_sb))
 620                                 err(EX_OSERR, "%s: stat", to_name);
 621                         if (S_ISREG(to_sb.st_mode)) {
 622                                 /*
 623                                  * XXX: hard links to anything other than
 624                                  * plain files are not metalogged
 625                                  */
 626                                 int omode;
 627                                 const char *oowner, *ogroup;
 628                                 char *offlags;
 629                                 char *dres;
 630
 631                                 /*
 632                                  * XXX: use underlying perms, unless
 633                                  * overridden on command line.
 634                                  */
 635                                 omode = mode;
 636                                 if (!haveopt_m)
 637                                         mode = (to_sb.st_mode & 0777);
 638                                 oowner = owner;
 639                                 if (!haveopt_o)
 640                                         owner = NULL;
 641                                 ogroup = group;
 642                                 if (!haveopt_g)
 643                                         group = NULL;
 644                                 offlags = fflags;
 645                                 if (!haveopt_f)
 646                                         fflags = NULL;
 647                                 dres = digest_file(from_name);
 648                                 metadata_log(to_name, "file", NULL, NULL,
 649                                     dres, to_sb.st_size);
 650                                 free(dres);
 651                                 mode = omode;
 652                                 owner = oowner;
 653                                 group = ogroup;
 654                                 fflags = offlags;
 655                         }
 656                         return;
 657                 }
 658         }
 659
 660         /* Symbolic links. */
 661         if (dolink & LN_ABSOLUTE) {
 662                 /* Convert source path to absolute. */
 663                 if (realpath(from_name, src) == NULL)
 664                         err(EX_OSERR, "%s: realpath", from_name);
 665                 do_symlink(src, to_name, target_sb);
 666                 /* XXX: src may point outside of destdir */
 667                 metadata_log(to_name, "link", NULL, src, NULL, 0);
 668                 return;
 669         }
 670
 671         if (dolink & LN_RELATIVE) {
 672                 char *cp, *d, *s;
 673
 674                 /* Resolve pathnames. */
 675                 if (realpath(from_name, src) == NULL)
 676                         err(EX_OSERR, "%s: realpath", from_name);
 677
 678                 /*
 679                  * The last component of to_name may be a symlink,
 680                  * so use realpath to resolve only the directory.
 681                  */
 682                 cp = dirname(to_name);
 683                 if (realpath(cp, dst) == NULL)
 684                         err(EX_OSERR, "%s: realpath", cp);
 685                 /* .. and add the last component. */
 686                 if (strcmp(dst, "/") != 0) {
 687                         if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst))
 688                                 errx(1, "resolved pathname too long");
 689                 }
 690                 cp = basename(to_name);
 691                 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst))
 692                         errx(1, "resolved pathname too long");
 693
 694                 /* Trim common path components. */
 695                 for (s = src, d = dst; *s == *d; s++, d++)
 696                         continue;
 697                 while (*s != '/')
 698                         s--, d--;
 699
 700                 /* Count the number of directories we need to backtrack. */
 701                 for (++d, lnk[0] = '\0'; *d; d++)
 702                         if (*d == '/')
 703                                 (void)strlcat(lnk, "../", sizeof(lnk));
 704
 705                 (void)strlcat(lnk, ++s, sizeof(lnk));
 706
 707                 do_symlink(lnk, to_name, target_sb);
 708                 /* XXX: Link may point outside of destdir. */
 709                 metadata_log(to_name, "link", NULL, lnk, NULL, 0);
 710                 return;
 711         }
 712
 713         /*
 714          * If absolute or relative was not specified, try the names the
 715          * user provided.
 716          */
 717         do_symlink(from_name, to_name, target_sb);
 718         /* XXX: from_name may point outside of destdir. */
 719         metadata_log(to_name, "link", NULL, from_name, NULL, 0);
 720 }
 721
 722 /*
 723  * install --
 724  *      build a path name and install the file
 725  */
 726 static void
 727 install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 728 {
 729         struct stat from_sb, temp_sb, to_sb;
 730         struct timeval tvb[2];
 731         int devnull, files_match, from_fd, serrno, target;
 732         int tempcopy, temp_fd, to_fd;
 733         char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
 734         char *digestresult;
 735
 736         files_match = 0;
 737         from_fd = -1;
 738         to_fd = -1;
 739
 740         /* If try to install NULL file to a directory, fails. */
 741         if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
 742                 if (!dolink) {
 743                         if (stat(from_name, &from_sb))
 744                                 err(EX_OSERR, "%s", from_name);
 745                         if (!S_ISREG(from_sb.st_mode)) {
 746                                 errno = EFTYPE;
 747                                 err(EX_OSERR, "%s", from_name);
 748                         }
 749                 }
 750                 /* Build the target path. */
 751                 if (flags & DIRECTORY) {
 752                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
 753                             to_name,
 754                             (p = strrchr(from_name, '/')) ? ++p : from_name);
 755                         to_name = pathbuf;
 756                 }
 757                 devnull = 0;
 758         } else {
 759                 devnull = 1;
 760         }
 761
 762         target = (lstat(to_name, &to_sb) == 0);
 763
 764         if (dolink) {
 765                 if (target && !safecopy) {
 766                         if (to_sb.st_mode & S_IFDIR && rmdir(to_name) == -1)
 767                                 err(EX_OSERR, "%s", to_name);
 768                         if (to_sb.st_flags & NOCHANGEBITS)
 769                                 (void)chflags(to_name,
 770                                     to_sb.st_flags & ~NOCHANGEBITS);
 771                         unlink(to_name);
 772                 }
 773                 makelink(from_name, to_name, target ? &to_sb : NULL);
 774                 return;
 775         }
 776
 777         if (target && !S_ISREG(to_sb.st_mode) && !S_ISLNK(to_sb.st_mode)) {
 778                 errno = EFTYPE;
 779                 warn("%s", to_name);
 780                 return;
 781         }
 782
 783         /* Only copy safe if the target exists. */
 784         tempcopy = safecopy && target;
 785
 786         if (!devnull && (from_fd = open(from_name, O_RDONLY, 0)) < 0)
 787                 err(EX_OSERR, "%s", from_name);
 788
 789         /* If we don't strip, we can compare first. */
 790         if (docompare && !dostrip && target && S_ISREG(to_sb.st_mode)) {
 791                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
 792                         err(EX_OSERR, "%s", to_name);
 793                 if (devnull)
 794                         files_match = to_sb.st_size == 0;
 795                 else
 796                         files_match = !(compare(from_fd, from_name,
 797                             (size_t)from_sb.st_size, to_fd,
 798                             to_name, (size_t)to_sb.st_size, &digestresult));
 799
 800                 /* Close "to" file unless we match. */
 801                 if (!files_match)
 802                         (void)close(to_fd);
 803         }
 804
 805         if (!files_match) {
 806                 if (tempcopy) {
 807                         to_fd = create_tempfile(to_name, tempfile,
 808                             sizeof(tempfile));
 809                         if (to_fd < 0)
 810                                 err(EX_OSERR, "%s", tempfile);
 811                 } else {
 812                         if ((to_fd = create_newfile(to_name, target,
 813                             &to_sb)) < 0)
 814                                 err(EX_OSERR, "%s", to_name);
 815                         if (verbose)
 816                                 (void)printf("install: %s -> %s\n",
 817                                     from_name, to_name);
 818                 }
 819                 if (!devnull)
 820                         digestresult = copy(from_fd, from_name, to_fd,
 821                              tempcopy ? tempfile : to_name, from_sb.st_size);
 822                 else
 823                         digestresult = NULL;
 824         }
 825
 826         if (dostrip) {
 827                 strip(tempcopy ? tempfile : to_name);
 828
 829                 /*
 830                  * Re-open our fd on the target, in case we used a strip
 831                  * that does not work in-place -- like GNU binutils strip.
 832                  */
 833                 close(to_fd);
 834                 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0);
 835                 if (to_fd < 0)
 836                         err(EX_OSERR, "stripping %s", to_name);
 837         }
 838
 839         /*
 840          * Compare the stripped temp file with the target.
 841          */
 842         if (docompare && dostrip && target && S_ISREG(to_sb.st_mode)) {
 843                 temp_fd = to_fd;
 844
 845                 /* Re-open to_fd using the real target name. */
 846                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
 847                         err(EX_OSERR, "%s", to_name);
 848
 849                 if (fstat(temp_fd, &temp_sb)) {
 850                         serrno = errno;
 851                         (void)unlink(tempfile);
 852                         errno = serrno;
 853                         err(EX_OSERR, "%s", tempfile);
 854                 }
 855
 856                 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
 857                             to_name, (size_t)to_sb.st_size, &digestresult)
 858                             == 0) {
 859                         /*
 860                          * If target has more than one link we need to
 861                          * replace it in order to snap the extra links.
 862                          * Need to preserve target file times, though.
 863                          */
 864                         if (to_sb.st_nlink != 1) {
 865                                 tvb[0].tv_sec = to_sb.st_atime;
 866                                 tvb[0].tv_usec = 0;
 867                                 tvb[1].tv_sec = to_sb.st_mtime;
 868                                 tvb[1].tv_usec = 0;
 869                                 (void)utimes(tempfile, tvb);
 870                         } else {
 871                                 files_match = 1;
 872                                 (void)unlink(tempfile);
 873                         }
 874                         (void) close(temp_fd);
 875                 }
 876         } else if (dostrip)
 877                 digestresult = digest_file(tempfile);
 878
 879         /*
 880          * Move the new file into place if doing a safe copy
 881          * and the files are different (or just not compared).
 882          */
 883         if (tempcopy && !files_match) {
 884                 /* Try to turn off the immutable bits. */
 885                 if (to_sb.st_flags & NOCHANGEBITS)
 886                         (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
 887                 if (dobackup) {
 888                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
 889                             suffix) != strlen(to_name) + strlen(suffix)) {
 890                                 unlink(tempfile);
 891                                 errx(EX_OSERR, "%s: backup filename too long",
 892                                     to_name);
 893                         }
 894                         if (verbose)
 895                                 (void)printf("install: %s -> %s\n", to_name, backup);
 896                         if (unlink(backup) < 0 && errno != ENOENT) {
 897                                 serrno = errno;
 898                                 if (to_sb.st_flags & NOCHANGEBITS)
 899                                         (void)chflags(to_name, to_sb.st_flags);
 900                                 unlink(tempfile);
 901                                 errno = serrno;
 902                                 err(EX_OSERR, "unlink: %s", backup);
 903                         }
 904                         if (link(to_name, backup) < 0) {
 905                                 serrno = errno;
 906                                 unlink(tempfile);
 907                                 if (to_sb.st_flags & NOCHANGEBITS)
 908                                         (void)chflags(to_name, to_sb.st_flags);
 909                                 errno = serrno;
 910                                 err(EX_OSERR, "link: %s to %s", to_name,
 911                                      backup);
 912                         }
 913                 }
 914                 if (verbose)
 915                         (void)printf("install: %s -> %s\n", from_name, to_name);
 916                 if (rename(tempfile, to_name) < 0) {
 917                         serrno = errno;
 918                         unlink(tempfile);
 919                         errno = serrno;
 920                         err(EX_OSERR, "rename: %s to %s",
 921                             tempfile, to_name);
 922                 }
 923
 924                 /* Re-open to_fd so we aren't hosed by the rename(2). */
 925                 (void) close(to_fd);
 926                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
 927                         err(EX_OSERR, "%s", to_name);
 928         }
 929
 930         /*
 931          * Preserve the timestamp of the source file if necessary.
 932          */
 933         if (dopreserve && !files_match && !devnull) {
 934                 tvb[0].tv_sec = from_sb.st_atime;
 935                 tvb[0].tv_usec = 0;
 936                 tvb[1].tv_sec = from_sb.st_mtime;
 937                 tvb[1].tv_usec = 0;
 938                 (void)utimes(to_name, tvb);
 939         }
 940
 941         if (fstat(to_fd, &to_sb) == -1) {
 942                 serrno = errno;
 943                 (void)unlink(to_name);
 944                 errno = serrno;
 945                 err(EX_OSERR, "%s", to_name);
 946         }
 947
 948         /*
 949          * Set owner, group, mode for target; do the chown first,
 950          * chown may lose the setuid bits.
 951          */
 952         if (!dounpriv && ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
 953             (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
 954             (mode != (to_sb.st_mode & ALLPERMS)))) {
 955                 /* Try to turn off the immutable bits. */
 956                 if (to_sb.st_flags & NOCHANGEBITS)
 957                         (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
 958         }
 959
 960         if (!dounpriv &
 961             (gid != (gid_t)-1 && gid != to_sb.st_gid) ||
 962             (uid != (uid_t)-1 && uid != to_sb.st_uid))
 963                 if (fchown(to_fd, uid, gid) == -1) {
 964                         serrno = errno;
 965                         (void)unlink(to_name);
 966                         errno = serrno;
 967                         err(EX_OSERR,"%s: chown/chgrp", to_name);
 968                 }
 969
 970         if (mode != (to_sb.st_mode & ALLPERMS)) {
 971                 if (fchmod(to_fd,
 972                      dounpriv ? mode & (S_IRWXU|S_IRWXG|S_IRWXO) : mode)) {
 973                         serrno = errno;
 974                         (void)unlink(to_name);
 975                         errno = serrno;
 976                         err(EX_OSERR, "%s: chmod", to_name);
 977                 }
 978         }
 979
 980         /*
 981          * If provided a set of flags, set them, otherwise, preserve the
 982          * flags, except for the dump flag.
 983          * NFS does not support flags.  Ignore EOPNOTSUPP flags if we're just
 984          * trying to turn off UF_NODUMP.  If we're trying to set real flags,
 985          * then warn if the fs doesn't support it, otherwise fail.
 986          */
 987         if (!dounpriv & !devnull && (flags & SETFLAGS ||
 988             (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
 989             fchflags(to_fd,
 990             flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
 991                 if (flags & SETFLAGS) {
 992                         if (errno == EOPNOTSUPP)
 993                                 warn("%s: chflags", to_name);
 994                         else {
 995                                 serrno = errno;
 996                                 (void)unlink(to_name);
 997                                 errno = serrno;
 998                                 err(EX_OSERR, "%s: chflags", to_name);
 999                         }
1000                 }
1001         }
1002
1003         (void)close(to_fd);
1004         if (!devnull)
1005                 (void)close(from_fd);
1006
1007         metadata_log(to_name, "file", tvb, NULL, digestresult, to_sb.st_size);
1008         free(digestresult);
1009 }
1010
1011 /*
1012  * compare --
1013  *      compare two files; non-zero means files differ
1014  */
1015 static int
1016 compare(int from_fd, const char *from_name __unused, size_t from_len,
1017         int to_fd, const char *to_name __unused, size_t to_len,
1018         char **dresp)
1019 {
1020         char *p, *q;
1021         int rv;
1022         int done_compare;
1023         DIGEST_CTX ctx;
1024
1025         rv = 0;
1026         if (from_len != to_len)
1027                 return 1;
1028
1029         if (from_len <= MAX_CMP_SIZE) {
1030                 if (dresp != NULL)
1031                         digest_init(&ctx);
1032                 done_compare = 0;
1033                 if (trymmap(from_fd) && trymmap(to_fd)) {
1034                         p = mmap(NULL, from_len, PROT_READ, MAP_SHARED,
1035                             from_fd, (off_t)0);
1036                         if (p == (char *)MAP_FAILED)
1037                                 goto out;
1038                         q = mmap(NULL, from_len, PROT_READ, MAP_SHARED,
1039                             to_fd, (off_t)0);
1040                         if (q == (char *)MAP_FAILED) {
1041                                 munmap(p, from_len);
1042                                 goto out;
1043                         }
1044
1045                         rv = memcmp(p, q, from_len);
1046                         if (dresp != NULL)
1047                                 digest_update(&ctx, p, from_len);
1048                         munmap(p, from_len);
1049                         munmap(q, from_len);
1050                         done_compare = 1;
1051                 }
1052         out:
1053                 if (!done_compare) {
1054                         char buf1[MAXBSIZE];
1055                         char buf2[MAXBSIZE];
1056                         int n1, n2;
1057
1058                         rv = 0;
1059                         lseek(from_fd, 0, SEEK_SET);
1060                         lseek(to_fd, 0, SEEK_SET);
1061                         while (rv == 0) {
1062                                 n1 = read(from_fd, buf1, sizeof(buf1));
1063                                 if (n1 == 0)
1064                                         break;          /* EOF */
1065                                 else if (n1 > 0) {
1066                                         n2 = read(to_fd, buf2, n1);
1067                                         if (n2 == n1)
1068                                                 rv = memcmp(buf1, buf2, n1);
1069                                         else
1070                                                 rv = 1; /* out of sync */
1071                                 } else
1072                                         rv = 1;         /* read failure */
1073                                 digest_update(&ctx, buf1, n1);
1074                         }
1075                         lseek(from_fd, 0, SEEK_SET);
1076                         lseek(to_fd, 0, SEEK_SET);
1077                 }
1078         } else
1079                 rv = 1; /* don't bother in this case */
1080
1081         if (dresp != NULL) {
1082                 if (rv == 0)
1083                         *dresp = digest_end(&ctx, NULL);
1084                 else
1085                         (void)digest_end(&ctx, NULL);
1086         }
1087
1088         return rv;
1089 }
1090
1091 /*
1092  * create_tempfile --
1093  *      create a temporary file based on path and open it
1094  */
1095 static int
1096 create_tempfile(const char *path, char *temp, size_t tsize)
1097 {
1098         char *p;
1099
1100         (void)strncpy(temp, path, tsize);
1101         temp[tsize - 1] = '\0';
1102         if ((p = strrchr(temp, '/')) != NULL)
1103                 p++;
1104         else
1105                 p = temp;
1106         (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
1107         temp[tsize - 1] = '\0';
1108         return (mkstemp(temp));
1109 }
1110
1111 /*
1112  * create_newfile --
1113  *      create a new file, overwriting an existing one if necessary
1114  */
1115 static int
1116 create_newfile(const char *path, int target, struct stat *sbp)
1117 {
1118         char backup[MAXPATHLEN];
1119         int saved_errno = 0;
1120         int newfd;
1121
1122         if (target) {
1123                 /*
1124                  * Unlink now... avoid ETXTBSY errors later.  Try to turn
1125                  * off the append/immutable bits -- if we fail, go ahead,
1126                  * it might work.
1127                  */
1128                 if (sbp->st_flags & NOCHANGEBITS)
1129                         (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
1130
1131                 if (dobackup) {
1132                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
1133                             path, suffix) != strlen(path) + strlen(suffix)) {
1134                                 saved_errno = errno;
1135                                 if (sbp->st_flags & NOCHANGEBITS)
1136                                         (void)chflags(path, sbp->st_flags);
1137                                 errno = saved_errno;
1138                                 errx(EX_OSERR, "%s: backup filename too long",
1139                                     path);
1140                         }
1141                         (void)snprintf(backup, MAXPATHLEN, "%s%s",
1142                             path, suffix);
1143                         if (verbose)
1144                                 (void)printf("install: %s -> %s\n",
1145                                     path, backup);
1146                         if (rename(path, backup) < 0) {
1147                                 saved_errno = errno;
1148                                 if (sbp->st_flags & NOCHANGEBITS)
1149                                         (void)chflags(path, sbp->st_flags);
1150                                 errno = saved_errno;
1151                                 err(EX_OSERR, "rename: %s to %s", path, backup);
1152                         }
1153                 } else
1154                         if (unlink(path) < 0)
1155                                 saved_errno = errno;
1156         }
1157
1158         newfd = open(path, O_CREAT | O_RDWR | O_TRUNC, S_IRUSR | S_IWUSR);
1159         if (newfd < 0 && saved_errno != 0)
1160                 errno = saved_errno;
1161         return newfd;
1162 }
1163
1164 /*
1165  * copy --
1166  *      copy from one file to another
1167  */
1168 static char *
1169 copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
1170     off_t size)
1171 {
1172         int nr, nw;
1173         int serrno;
1174         char *p, buf[MAXBSIZE];
1175         int done_copy;
1176         DIGEST_CTX ctx;
1177
1178         /* Rewind file descriptors. */
1179         if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1180                 err(EX_OSERR, "lseek: %s", from_name);
1181         if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1182                 err(EX_OSERR, "lseek: %s", to_name);
1183
1184         digest_init(&ctx);
1185
1186         /*
1187          * Mmap and write if less than 8M (the limit is so we don't totally
1188          * trash memory on big files.  This is really a minor hack, but it
1189          * wins some CPU back.
1190          */
1191         done_copy = 0;
1192         if (size <= 8 * 1048576 && trymmap(from_fd) &&
1193             (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
1194                     from_fd, (off_t)0)) != (char *)MAP_FAILED) {
1195                 nw = write(to_fd, p, size);
1196                 if (nw != size) {
1197                         serrno = errno;
1198                         (void)unlink(to_name);
1199                         if (nw >= 0) {
1200                                 errx(EX_OSERR,
1201      "short write to %s: %jd bytes written, %jd bytes asked to write",
1202                                     to_name, (uintmax_t)nw, (uintmax_t)size);
1203                         } else {
1204                                 errno = serrno;
1205                                 err(EX_OSERR, "%s", to_name);
1206                         }
1207                 }
1208                 digest_update(&ctx, p, size);
1209                 (void)munmap(p, size);
1210                 done_copy = 1;
1211         }
1212         if (!done_copy) {
1213                 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) {
1214                         if ((nw = write(to_fd, buf, nr)) != nr) {
1215                                 serrno = errno;
1216                                 (void)unlink(to_name);
1217                                 if (nw >= 0) {
1218                                         errx(EX_OSERR,
1219      "short write to %s: %jd bytes written, %jd bytes asked to write",
1220                                             to_name, (uintmax_t)nw,
1221                                             (uintmax_t)size);
1222                                 } else {
1223                                         errno = serrno;
1224                                         err(EX_OSERR, "%s", to_name);
1225                                 }
1226                         }
1227                         digest_update(&ctx, buf, nr);
1228                 }
1229                 if (nr != 0) {
1230                         serrno = errno;
1231                         (void)unlink(to_name);
1232                         errno = serrno;
1233                         err(EX_OSERR, "%s", from_name);
1234                 }
1235         }
1236         return (digest_end(&ctx, NULL));
1237 }
1238
1239 /*
1240  * strip --
1241  *      use strip(1) to strip the target file
1242  */
1243 static void
1244 strip(const char *to_name)
1245 {
1246         const char *stripbin;
1247         int serrno, status;
1248
1249         switch (fork()) {
1250         case -1:
1251                 serrno = errno;
1252                 (void)unlink(to_name);
1253                 errno = serrno;
1254                 err(EX_TEMPFAIL, "fork");
1255         case 0:
1256                 stripbin = getenv("STRIPBIN");
1257                 if (stripbin == NULL)
1258                         stripbin = "strip";
1259                 execlp(stripbin, stripbin, to_name, (char *)NULL);
1260                 err(EX_OSERR, "exec(%s)", stripbin);
1261         default:
1262                 if (wait(&status) == -1 || status) {
1263                         serrno = errno;
1264                         (void)unlink(to_name);
1265                         errc(EX_SOFTWARE, serrno, "wait");
1266                         /* NOTREACHED */
1267                 }
1268         }
1269 }
1270
1271 /*
1272  * install_dir --
1273  *      build directory hierarchy
1274  */
1275 static void
1276 install_dir(char *path)
1277 {
1278         char *p;
1279         struct stat sb;
1280         int ch;
1281
1282         for (p = path;; ++p)
1283                 if (!*p || (p != path && *p  == '/')) {
1284                         ch = *p;
1285                         *p = '\0';
1286                         if (stat(path, &sb)) {
1287                                 if (errno != ENOENT || mkdir(path, 0755) < 0) {
1288                                         err(EX_OSERR, "mkdir %s", path);
1289                                         /* NOTREACHED */
1290                                 } else if (verbose)
1291                                         (void)printf("install: mkdir %s\n",
1292                                                      path);
1293                         } else if (!S_ISDIR(sb.st_mode))
1294                                 errx(EX_OSERR, "%s exists but is not a directory", path);
1295                         if (!(*p = ch))
1296                                 break;
1297                 }
1298
1299         if (!dounpriv) {
1300                 if ((gid != (gid_t)-1 || uid != (uid_t)-1) &&
1301                     chown(path, uid, gid))
1302                         warn("chown %u:%u %s", uid, gid, path);
1303                 /* XXXBED: should we do the chmod in the dounpriv case? */
1304                 if (chmod(path, mode))
1305                         warn("chmod %o %s", mode, path);
1306         }
1307         metadata_log(path, "dir", NULL, NULL, NULL, 0);
1308 }
1309
1310 /*
1311  * metadata_log --
1312  *      if metafp is not NULL, output mtree(8) full path name and settings to
1313  *      metafp, to allow permissions to be set correctly by other tools,
1314  *      or to allow integrity checks to be performed.
1315  */
1316 static void
1317 metadata_log(const char *path, const char *type, struct timeval *tv,
1318         const char *slink, const char *digestresult, off_t size)
1319 {
1320         static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' };
1321         const char *p;
1322         char *buf;
1323         size_t destlen;
1324         struct flock metalog_lock;
1325
1326         if (!metafp)
1327                 return;
1328         /* Buffer for strsvis(3). */
1329         buf = (char *)malloc(4 * strlen(path) + 1);
1330         if (buf == NULL) {
1331                 warnx("%s", strerror(ENOMEM));
1332                 return;
1333         }
1334
1335         /* Lock log file. */
1336         metalog_lock.l_start = 0;
1337         metalog_lock.l_len = 0;
1338         metalog_lock.l_whence = SEEK_SET;
1339         metalog_lock.l_type = F_WRLCK;
1340         if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) {
1341                 warn("can't lock %s", metafile);
1342                 free(buf);
1343                 return;
1344         }
1345
1346         /* Remove destdir. */
1347         p = path;
1348         if (destdir) {
1349                 destlen = strlen(destdir);
1350                 if (strncmp(p, destdir, destlen) == 0 &&
1351                     (p[destlen] == '/' || p[destlen] == '\0'))
1352                         p += destlen;
1353         }
1354         while (*p && *p == '/')
1355                 p++;
1356         strsvis(buf, p, VIS_OCTAL, extra);
1357         p = buf;
1358         /* Print details. */
1359         fprintf(metafp, ".%s%s type=%s", *p ? "/" : "", p, type);
1360         if (owner)
1361                 fprintf(metafp, " uname=%s", owner);
1362         if (group)
1363                 fprintf(metafp, " gname=%s", group);
1364         fprintf(metafp, " mode=%#o", mode);
1365         if (slink) {
1366                 strsvis(buf, slink, VIS_CSTYLE, extra); /* encode link */
1367                 fprintf(metafp, " link=%s", buf);
1368         }
1369         if (*type == 'f') /* type=file */
1370                 fprintf(metafp, " size=%lld", (long long)size);
1371         if (tv != NULL && dopreserve)
1372                 fprintf(metafp, " time=%lld.%ld",
1373                         (long long)tv[1].tv_sec, (long)tv[1].tv_usec);
1374         if (digestresult && digest)
1375                 fprintf(metafp, " %s=%s", digest, digestresult);
1376         if (fflags)
1377                 fprintf(metafp, " flags=%s", fflags);
1378         if (tags)
1379                 fprintf(metafp, " tags=%s", tags);
1380         fputc('\n', metafp);
1381         /* Flush line. */
1382         fflush(metafp);
1383
1384         /* Unlock log file. */
1385         metalog_lock.l_type = F_UNLCK;
1386         if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1)
1387                 warn("can't unlock %s", metafile);
1388         free(buf);
1389 }
1390
1391 /*
1392  * usage --
1393  *      print a usage message and die
1394  */
1395 static void
1396 usage(void)
1397 {
1398         (void)fprintf(stderr,
1399 "usage: install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n"
1400 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1401 "               [-B suffix] [-l linkflags] [-N dbdir]\n"
1402 "               file1 file2\n"
1403 "       install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n"
1404 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1405 "               [-B suffix] [-l linkflags] [-N dbdir]\n"
1406 "               file1 ... fileN directory\n"
1407 "       install -dU [-vU] [-g group] [-m mode] [-N dbdir] [-o owner]\n"
1408 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1409 "               directory ...\n");
1410         exit(EX_USAGE);
1411         /* NOTREACHED */
1412 }
1413
1414 /*
1415  * trymmap --
1416  *      return true (1) if mmap should be tried, false (0) if not.
1417  */
1418 static int
1419 trymmap(int fd)
1420 {
1421 /*
1422  * The ifdef is for bootstrapping - f_fstypename doesn't exist in
1423  * pre-Lite2-merge systems.
1424  */
1425 #ifdef MFSNAMELEN
1426         struct statfs stfs;
1427
1428         if (fstatfs(fd, &stfs) != 0)
1429                 return (0);
1430         if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
1431             strcmp(stfs.f_fstypename, "cd9660") == 0)
1432                 return (1);
1433 #endif
1434         return (0);
1435 }