usr.bin/xinstall/xinstall.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2012, 2013 SRI International
   5  * Copyright (c) 1987, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #ifndef lint
  34 static const char copyright[] =
  35 "@(#) Copyright (c) 1987, 1993\n\
  36         The Regents of the University of California.  All rights reserved.\n";
  37 #endif /* not lint */
  38
  39 #if 0
  40 #ifndef lint
  41 static char sccsid[] = "@(#)xinstall.c  8.1 (Berkeley) 7/21/93";
  42 #endif /* not lint */
  43 #endif
  44
  45 #include <sys/cdefs.h>
  46 __FBSDID("$FreeBSD$");
  47
  48 #include <sys/param.h>
  49 #include <sys/mman.h>
  50 #include <sys/mount.h>
  51 #include <sys/stat.h>
  52 #include <sys/time.h>
  53 #include <sys/wait.h>
  54
  55 #include <err.h>
  56 #include <errno.h>
  57 #include <fcntl.h>
  58 #include <grp.h>
  59 #include <libgen.h>
  60 #include <md5.h>
  61 #include <paths.h>
  62 #include <pwd.h>
  63 #include <ripemd.h>
  64 #include <sha.h>
  65 #include <sha256.h>
  66 #include <sha512.h>
  67 #include <spawn.h>
  68 #include <stdint.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <string.h>
  72 #include <sysexits.h>
  73 #include <unistd.h>
  74 #include <vis.h>
  75
  76 #include "mtree.h"
  77
  78 /*
  79  * We need to build xinstall during the bootstrap stage when building on a
  80  * non-FreeBSD system. Linux does not have the st_flags and st_birthtime
  81  * members in struct stat so we need to omit support for changing those fields.
  82  */
  83 #ifdef UF_SETTABLE
  84 #define HAVE_STRUCT_STAT_ST_FLAGS 1
  85 #else
  86 #define HAVE_STRUCT_STAT_ST_FLAGS 0
  87 #endif
  88
  89 #define MAX_CMP_SIZE    (16 * 1024 * 1024)
  90
  91 #define LN_ABSOLUTE     0x01
  92 #define LN_RELATIVE     0x02
  93 #define LN_HARD         0x04
  94 #define LN_SYMBOLIC     0x08
  95 #define LN_MIXED        0x10
  96
  97 #define DIRECTORY       0x01            /* Tell install it's a directory. */
  98 #define SETFLAGS        0x02            /* Tell install to set flags. */
  99 #define NOCHANGEBITS    (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
 100 #define BACKUP_SUFFIX   ".old"
 101
 102 typedef union {
 103         MD5_CTX         MD5;
 104         RIPEMD160_CTX   RIPEMD160;
 105         SHA1_CTX        SHA1;
 106         SHA256_CTX      SHA256;
 107         SHA512_CTX      SHA512;
 108 }       DIGEST_CTX;
 109
 110 static enum {
 111         DIGEST_NONE = 0,
 112         DIGEST_MD5,
 113         DIGEST_RIPEMD160,
 114         DIGEST_SHA1,
 115         DIGEST_SHA256,
 116         DIGEST_SHA512,
 117 } digesttype = DIGEST_NONE;
 118
 119 extern char **environ;
 120
 121 static gid_t gid;
 122 static uid_t uid;
 123 static int dobackup, docompare, dodir, dolink, dopreserve, dostrip, dounpriv,
 124     safecopy, verbose;
 125 static int haveopt_f, haveopt_g, haveopt_m, haveopt_o;
 126 static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
 127 static FILE *metafp;
 128 static const char *group, *owner;
 129 static const char *suffix = BACKUP_SUFFIX;
 130 static char *destdir, *digest, *fflags, *metafile, *tags;
 131
 132 static int      compare(int, const char *, size_t, int, const char *, size_t,
 133                     char **);
 134 static char     *copy(int, const char *, int, const char *, off_t);
 135 static int      create_newfile(const char *, int, struct stat *);
 136 static int      create_tempfile(const char *, char *, size_t);
 137 static char     *quiet_mktemp(char *template);
 138 static char     *digest_file(const char *);
 139 static void     digest_init(DIGEST_CTX *);
 140 static void     digest_update(DIGEST_CTX *, const char *, size_t);
 141 static char     *digest_end(DIGEST_CTX *, char *);
 142 static int      do_link(const char *, const char *, const struct stat *);
 143 static void     do_symlink(const char *, const char *, const struct stat *);
 144 static void     makelink(const char *, const char *, const struct stat *);
 145 static void     install(const char *, const char *, u_long, u_int);
 146 static void     install_dir(char *);
 147 static void     metadata_log(const char *, const char *, struct timespec *,
 148                     const char *, const char *, off_t);
 149 static int      parseid(const char *, id_t *);
 150 static void     strip(const char *);
 151 static int      trymmap(int);
 152 static void     usage(void);
 153
 154 int
 155 main(int argc, char *argv[])
 156 {
 157         struct stat from_sb, to_sb;
 158         mode_t *set;
 159         u_long fset;
 160         int ch, no_target;
 161         u_int iflags;
 162         char *p;
 163         const char *to_name;
 164
 165         fset = 0;
 166         iflags = 0;
 167         group = owner = NULL;
 168         while ((ch = getopt(argc, argv, "B:bCcD:df:g:h:l:M:m:N:o:pSsT:Uv")) !=
 169              -1)
 170                 switch((char)ch) {
 171                 case 'B':
 172                         suffix = optarg;
 173                         /* FALLTHROUGH */
 174                 case 'b':
 175                         dobackup = 1;
 176                         break;
 177                 case 'C':
 178                         docompare = 1;
 179                         break;
 180                 case 'c':
 181                         /* For backwards compatibility. */
 182                         break;
 183                 case 'D':
 184                         destdir = optarg;
 185                         break;
 186                 case 'd':
 187                         dodir = 1;
 188                         break;
 189                 case 'f':
 190                         haveopt_f = 1;
 191                         fflags = optarg;
 192                         break;
 193                 case 'g':
 194                         haveopt_g = 1;
 195                         group = optarg;
 196                         break;
 197                 case 'h':
 198                         digest = optarg;
 199                         break;
 200                 case 'l':
 201                         for (p = optarg; *p != '\0'; p++)
 202                                 switch (*p) {
 203                                 case 's':
 204                                         dolink &= ~(LN_HARD|LN_MIXED);
 205                                         dolink |= LN_SYMBOLIC;
 206                                         break;
 207                                 case 'h':
 208                                         dolink &= ~(LN_SYMBOLIC|LN_MIXED);
 209                                         dolink |= LN_HARD;
 210                                         break;
 211                                 case 'm':
 212                                         dolink &= ~(LN_SYMBOLIC|LN_HARD);
 213                                         dolink |= LN_MIXED;
 214                                         break;
 215                                 case 'a':
 216                                         dolink &= ~LN_RELATIVE;
 217                                         dolink |= LN_ABSOLUTE;
 218                                         break;
 219                                 case 'r':
 220                                         dolink &= ~LN_ABSOLUTE;
 221                                         dolink |= LN_RELATIVE;
 222                                         break;
 223                                 default:
 224                                         errx(1, "%c: invalid link type", *p);
 225                                         /* NOTREACHED */
 226                                 }
 227                         break;
 228                 case 'M':
 229                         metafile = optarg;
 230                         break;
 231                 case 'm':
 232                         haveopt_m = 1;
 233                         if (!(set = setmode(optarg)))
 234                                 errx(EX_USAGE, "invalid file mode: %s",
 235                                      optarg);
 236                         mode = getmode(set, 0);
 237                         free(set);
 238                         break;
 239                 case 'N':
 240                         if (!setup_getid(optarg))
 241                                 err(EX_OSERR, "Unable to use user and group "
 242                                     "databases in `%s'", optarg);
 243                         break;
 244                 case 'o':
 245                         haveopt_o = 1;
 246                         owner = optarg;
 247                         break;
 248                 case 'p':
 249                         docompare = dopreserve = 1;
 250                         break;
 251                 case 'S':
 252                         safecopy = 1;
 253                         break;
 254                 case 's':
 255                         dostrip = 1;
 256                         break;
 257                 case 'T':
 258                         tags = optarg;
 259                         break;
 260                 case 'U':
 261                         dounpriv = 1;
 262                         break;
 263                 case 'v':
 264                         verbose = 1;
 265                         break;
 266                 case '?':
 267                 default:
 268                         usage();
 269                 }
 270         argc -= optind;
 271         argv += optind;
 272
 273         /* some options make no sense when creating directories */
 274         if (dostrip && dodir) {
 275                 warnx("-d and -s may not be specified together");
 276                 usage();
 277         }
 278
 279         if (getenv("DONTSTRIP") != NULL) {
 280                 warnx("DONTSTRIP set - will not strip installed binaries");
 281                 dostrip = 0;
 282         }
 283
 284         /* must have at least two arguments, except when creating directories */
 285         if (argc == 0 || (argc == 1 && !dodir))
 286                 usage();
 287
 288         if (digest != NULL) {
 289                 if (strcmp(digest, "none") == 0) {
 290                         digesttype = DIGEST_NONE;
 291                 } else if (strcmp(digest, "md5") == 0) {
 292                        digesttype = DIGEST_MD5;
 293                 } else if (strcmp(digest, "rmd160") == 0) {
 294                         digesttype = DIGEST_RIPEMD160;
 295                 } else if (strcmp(digest, "sha1") == 0) {
 296                         digesttype = DIGEST_SHA1;
 297                 } else if (strcmp(digest, "sha256") == 0) {
 298                         digesttype = DIGEST_SHA256;
 299                 } else if (strcmp(digest, "sha512") == 0) {
 300                         digesttype = DIGEST_SHA512;
 301                 } else {
 302                         warnx("unknown digest `%s'", digest);
 303                         usage();
 304                 }
 305         }
 306
 307         /* need to make a temp copy so we can compare stripped version */
 308         if (docompare && dostrip)
 309                 safecopy = 1;
 310
 311         /* get group and owner id's */
 312         if (group != NULL && !dounpriv) {
 313                 if (gid_from_group(group, &gid) == -1) {
 314                         id_t id;
 315                         if (!parseid(group, &id))
 316                                 errx(1, "unknown group %s", group);
 317                         gid = id;
 318                 }
 319         } else
 320                 gid = (gid_t)-1;
 321
 322         if (owner != NULL && !dounpriv) {
 323                 if (uid_from_user(owner, &uid) == -1) {
 324                         id_t id;
 325                         if (!parseid(owner, &id))
 326                                 errx(1, "unknown user %s", owner);
 327                         uid = id;
 328                 }
 329         } else
 330                 uid = (uid_t)-1;
 331
 332         if (fflags != NULL && !dounpriv) {
 333                 if (strtofflags(&fflags, &fset, NULL))
 334                         errx(EX_USAGE, "%s: invalid flag", fflags);
 335                 iflags |= SETFLAGS;
 336         }
 337
 338         if (metafile != NULL) {
 339                 if ((metafp = fopen(metafile, "a")) == NULL)
 340                         warn("open %s", metafile);
 341         } else
 342                 digesttype = DIGEST_NONE;
 343
 344         if (dodir) {
 345                 for (; *argv != NULL; ++argv)
 346                         install_dir(*argv);
 347                 exit(EX_OK);
 348                 /* NOTREACHED */
 349         }
 350
 351         to_name = argv[argc - 1];
 352         no_target = stat(to_name, &to_sb);
 353         if (!no_target && S_ISDIR(to_sb.st_mode)) {
 354                 if (dolink & LN_SYMBOLIC) {
 355                         if (lstat(to_name, &to_sb) != 0)
 356                                 err(EX_OSERR, "%s vanished", to_name);
 357                         if (S_ISLNK(to_sb.st_mode)) {
 358                                 if (argc != 2) {
 359                                         errno = ENOTDIR;
 360                                         err(EX_USAGE, "%s", to_name);
 361                                 }
 362                                 install(*argv, to_name, fset, iflags);
 363                                 exit(EX_OK);
 364                         }
 365                 }
 366                 for (; *argv != to_name; ++argv)
 367                         install(*argv, to_name, fset, iflags | DIRECTORY);
 368                 exit(EX_OK);
 369                 /* NOTREACHED */
 370         }
 371
 372         /* can't do file1 file2 directory/file */
 373         if (argc != 2) {
 374                 if (no_target)
 375                         warnx("target directory `%s' does not exist",
 376                             argv[argc - 1]);
 377                 else
 378                         warnx("target `%s' is not a directory",
 379                             argv[argc - 1]);
 380                 usage();
 381         }
 382
 383         if (!no_target && !dolink) {
 384                 if (stat(*argv, &from_sb))
 385                         err(EX_OSERR, "%s", *argv);
 386                 if (!S_ISREG(to_sb.st_mode)) {
 387                         errno = EFTYPE;
 388                         err(EX_OSERR, "%s", to_name);
 389                 }
 390                 if (to_sb.st_dev == from_sb.st_dev &&
 391                     to_sb.st_ino == from_sb.st_ino)
 392                         errx(EX_USAGE,
 393                             "%s and %s are the same file", *argv, to_name);
 394         }
 395         install(*argv, to_name, fset, iflags);
 396         exit(EX_OK);
 397         /* NOTREACHED */
 398 }
 399
 400 static char *
 401 digest_file(const char *name)
 402 {
 403
 404         switch (digesttype) {
 405         case DIGEST_MD5:
 406                 return (MD5File(name, NULL));
 407         case DIGEST_RIPEMD160:
 408                 return (RIPEMD160_File(name, NULL));
 409         case DIGEST_SHA1:
 410                 return (SHA1_File(name, NULL));
 411         case DIGEST_SHA256:
 412                 return (SHA256_File(name, NULL));
 413         case DIGEST_SHA512:
 414                 return (SHA512_File(name, NULL));
 415         default:
 416                 return (NULL);
 417         }
 418 }
 419
 420 static void
 421 digest_init(DIGEST_CTX *c)
 422 {
 423
 424         switch (digesttype) {
 425         case DIGEST_NONE:
 426                 break;
 427         case DIGEST_MD5:
 428                 MD5Init(&(c->MD5));
 429                 break;
 430         case DIGEST_RIPEMD160:
 431                 RIPEMD160_Init(&(c->RIPEMD160));
 432                 break;
 433         case DIGEST_SHA1:
 434                 SHA1_Init(&(c->SHA1));
 435                 break;
 436         case DIGEST_SHA256:
 437                 SHA256_Init(&(c->SHA256));
 438                 break;
 439         case DIGEST_SHA512:
 440                 SHA512_Init(&(c->SHA512));
 441                 break;
 442         }
 443 }
 444
 445 static void
 446 digest_update(DIGEST_CTX *c, const char *data, size_t len)
 447 {
 448
 449         switch (digesttype) {
 450         case DIGEST_NONE:
 451                 break;
 452         case DIGEST_MD5:
 453                 MD5Update(&(c->MD5), data, len);
 454                 break;
 455         case DIGEST_RIPEMD160:
 456                 RIPEMD160_Update(&(c->RIPEMD160), data, len);
 457                 break;
 458         case DIGEST_SHA1:
 459                 SHA1_Update(&(c->SHA1), data, len);
 460                 break;
 461         case DIGEST_SHA256:
 462                 SHA256_Update(&(c->SHA256), data, len);
 463                 break;
 464         case DIGEST_SHA512:
 465                 SHA512_Update(&(c->SHA512), data, len);
 466                 break;
 467         }
 468 }
 469
 470 static char *
 471 digest_end(DIGEST_CTX *c, char *buf)
 472 {
 473
 474         switch (digesttype) {
 475         case DIGEST_MD5:
 476                 return (MD5End(&(c->MD5), buf));
 477         case DIGEST_RIPEMD160:
 478                 return (RIPEMD160_End(&(c->RIPEMD160), buf));
 479         case DIGEST_SHA1:
 480                 return (SHA1_End(&(c->SHA1), buf));
 481         case DIGEST_SHA256:
 482                 return (SHA256_End(&(c->SHA256), buf));
 483         case DIGEST_SHA512:
 484                 return (SHA512_End(&(c->SHA512), buf));
 485         default:
 486                 return (NULL);
 487         }
 488 }
 489
 490 /*
 491  * parseid --
 492  *      parse uid or gid from arg into id, returning non-zero if successful
 493  */
 494 static int
 495 parseid(const char *name, id_t *id)
 496 {
 497         char    *ep;
 498         errno = 0;
 499         *id = (id_t)strtoul(name, &ep, 10);
 500         if (errno || *ep != '\0')
 501                 return (0);
 502         return (1);
 503 }
 504
 505 /*
 506  * quiet_mktemp --
 507  *      mktemp implementation used mkstemp to avoid mktemp warnings.  We
 508  *      really do need mktemp semantics here as we will be creating a link.
 509  */
 510 static char *
 511 quiet_mktemp(char *template)
 512 {
 513         int fd;
 514
 515         if ((fd = mkstemp(template)) == -1)
 516                 return (NULL);
 517         close (fd);
 518         if (unlink(template) == -1)
 519                 err(EX_OSERR, "unlink %s", template);
 520         return (template);
 521 }
 522
 523 /*
 524  * do_link --
 525  *      make a hard link, obeying dorename if set
 526  *      return -1 on failure
 527  */
 528 static int
 529 do_link(const char *from_name, const char *to_name,
 530     const struct stat *target_sb)
 531 {
 532         char tmpl[MAXPATHLEN];
 533         int ret;
 534
 535         if (safecopy && target_sb != NULL) {
 536                 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
 537                 /* This usage is safe. */
 538                 if (quiet_mktemp(tmpl) == NULL)
 539                         err(EX_OSERR, "%s: mktemp", tmpl);
 540                 ret = link(from_name, tmpl);
 541                 if (ret == 0) {
 542                         if (target_sb->st_mode & S_IFDIR && rmdir(to_name) ==
 543                             -1) {
 544                                 unlink(tmpl);
 545                                 err(EX_OSERR, "%s", to_name);
 546                         }
 547 #if HAVE_STRUCT_STAT_ST_FLAGS
 548                         if (target_sb->st_flags & NOCHANGEBITS)
 549                                 (void)chflags(to_name, target_sb->st_flags &
 550                                      ~NOCHANGEBITS);
 551 #endif
 552                         if (verbose)
 553                                 printf("install: link %s -> %s\n",
 554                                     from_name, to_name);
 555                         ret = rename(tmpl, to_name);
 556                         /*
 557                          * If rename has posix semantics, then the temporary
 558                          * file may still exist when from_name and to_name point
 559                          * to the same file, so unlink it unconditionally.
 560                          */
 561                         (void)unlink(tmpl);
 562                 }
 563                 return (ret);
 564         } else {
 565                 if (verbose)
 566                         printf("install: link %s -> %s\n",
 567                             from_name, to_name);
 568                 return (link(from_name, to_name));
 569         }
 570 }
 571
 572 /*
 573  * do_symlink --
 574  *      Make a symbolic link, obeying dorename if set. Exit on failure.
 575  */
 576 static void
 577 do_symlink(const char *from_name, const char *to_name,
 578     const struct stat *target_sb)
 579 {
 580         char tmpl[MAXPATHLEN];
 581
 582         if (safecopy && target_sb != NULL) {
 583                 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name);
 584                 /* This usage is safe. */
 585                 if (quiet_mktemp(tmpl) == NULL)
 586                         err(EX_OSERR, "%s: mktemp", tmpl);
 587
 588                 if (symlink(from_name, tmpl) == -1)
 589                         err(EX_OSERR, "symlink %s -> %s", from_name, tmpl);
 590
 591                 if (target_sb->st_mode & S_IFDIR && rmdir(to_name) == -1) {
 592                         (void)unlink(tmpl);
 593                         err(EX_OSERR, "%s", to_name);
 594                 }
 595 #if HAVE_STRUCT_STAT_ST_FLAGS
 596                 if (target_sb->st_flags & NOCHANGEBITS)
 597                         (void)chflags(to_name, target_sb->st_flags &
 598                              ~NOCHANGEBITS);
 599 #endif
 600                 if (verbose)
 601                         printf("install: symlink %s -> %s\n",
 602                             from_name, to_name);
 603                 if (rename(tmpl, to_name) == -1) {
 604                         /* Remove temporary link before exiting. */
 605                         (void)unlink(tmpl);
 606                         err(EX_OSERR, "%s: rename", to_name);
 607                 }
 608         } else {
 609                 if (verbose)
 610                         printf("install: symlink %s -> %s\n",
 611                             from_name, to_name);
 612                 if (symlink(from_name, to_name) == -1)
 613                         err(EX_OSERR, "symlink %s -> %s", from_name, to_name);
 614         }
 615 }
 616
 617 /*
 618  * makelink --
 619  *      make a link from source to destination
 620  */
 621 static void
 622 makelink(const char *from_name, const char *to_name,
 623     const struct stat *target_sb)
 624 {
 625         char    src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN];
 626         struct stat     to_sb;
 627
 628         /* Try hard links first. */
 629         if (dolink & (LN_HARD|LN_MIXED)) {
 630                 if (do_link(from_name, to_name, target_sb) == -1) {
 631                         if ((dolink & LN_HARD) || errno != EXDEV)
 632                                 err(EX_OSERR, "link %s -> %s", from_name, to_name);
 633                 } else {
 634                         if (stat(to_name, &to_sb))
 635                                 err(EX_OSERR, "%s: stat", to_name);
 636                         if (S_ISREG(to_sb.st_mode)) {
 637                                 /*
 638                                  * XXX: hard links to anything other than
 639                                  * plain files are not metalogged
 640                                  */
 641                                 int omode;
 642                                 const char *oowner, *ogroup;
 643                                 char *offlags;
 644                                 char *dres;
 645
 646                                 /*
 647                                  * XXX: use underlying perms, unless
 648                                  * overridden on command line.
 649                                  */
 650                                 omode = mode;
 651                                 if (!haveopt_m)
 652                                         mode = (to_sb.st_mode & 0777);
 653                                 oowner = owner;
 654                                 if (!haveopt_o)
 655                                         owner = NULL;
 656                                 ogroup = group;
 657                                 if (!haveopt_g)
 658                                         group = NULL;
 659                                 offlags = fflags;
 660                                 if (!haveopt_f)
 661                                         fflags = NULL;
 662                                 dres = digest_file(from_name);
 663                                 metadata_log(to_name, "file", NULL, NULL,
 664                                     dres, to_sb.st_size);
 665                                 free(dres);
 666                                 mode = omode;
 667                                 owner = oowner;
 668                                 group = ogroup;
 669                                 fflags = offlags;
 670                         }
 671                         return;
 672                 }
 673         }
 674
 675         /* Symbolic links. */
 676         if (dolink & LN_ABSOLUTE) {
 677                 /* Convert source path to absolute. */
 678                 if (realpath(from_name, src) == NULL)
 679                         err(EX_OSERR, "%s: realpath", from_name);
 680                 do_symlink(src, to_name, target_sb);
 681                 /* XXX: src may point outside of destdir */
 682                 metadata_log(to_name, "link", NULL, src, NULL, 0);
 683                 return;
 684         }
 685
 686         if (dolink & LN_RELATIVE) {
 687                 char *to_name_copy, *cp, *d, *ld, *ls, *s;
 688
 689                 if (*from_name != '/') {
 690                         /* this is already a relative link */
 691                         do_symlink(from_name, to_name, target_sb);
 692                         /* XXX: from_name may point outside of destdir. */
 693                         metadata_log(to_name, "link", NULL, from_name, NULL, 0);
 694                         return;
 695                 }
 696
 697                 /* Resolve pathnames. */
 698                 if (realpath(from_name, src) == NULL)
 699                         err(EX_OSERR, "%s: realpath", from_name);
 700
 701                 /*
 702                  * The last component of to_name may be a symlink,
 703                  * so use realpath to resolve only the directory.
 704                  */
 705                 to_name_copy = strdup(to_name);
 706                 if (to_name_copy == NULL)
 707                         err(EX_OSERR, "%s: strdup", to_name);
 708                 cp = dirname(to_name_copy);
 709                 if (realpath(cp, dst) == NULL)
 710                         err(EX_OSERR, "%s: realpath", cp);
 711                 /* .. and add the last component. */
 712                 if (strcmp(dst, "/") != 0) {
 713                         if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst))
 714                                 errx(1, "resolved pathname too long");
 715                 }
 716                 strcpy(to_name_copy, to_name);
 717                 cp = basename(to_name_copy);
 718                 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst))
 719                         errx(1, "resolved pathname too long");
 720                 free(to_name_copy);
 721
 722                 /* Trim common path components. */
 723                 ls = ld = NULL;
 724                 for (s = src, d = dst; *s == *d; ls = s, ld = d, s++, d++)
 725                         continue;
 726                 /*
 727                  * If we didn't end after a directory separator, then we've
 728                  * falsely matched the last component.  For example, if one
 729                  * invoked install -lrs /lib/foo.so /libexec/ then the source
 730                  * would terminate just after the separator while the
 731                  * destination would terminate in the middle of 'libexec',
 732                  * leading to a full directory getting falsely eaten.
 733                  */
 734                 if ((ls != NULL && *ls != '/') || (ld != NULL && *ld != '/'))
 735                         s--, d--;
 736                 while (*s != '/')
 737                         s--, d--;
 738
 739                 /* Count the number of directories we need to backtrack. */
 740                 for (++d, lnk[0] = '\0'; *d; d++)
 741                         if (*d == '/')
 742                                 (void)strlcat(lnk, "../", sizeof(lnk));
 743
 744                 (void)strlcat(lnk, ++s, sizeof(lnk));
 745
 746                 do_symlink(lnk, to_name, target_sb);
 747                 /* XXX: Link may point outside of destdir. */
 748                 metadata_log(to_name, "link", NULL, lnk, NULL, 0);
 749                 return;
 750         }
 751
 752         /*
 753          * If absolute or relative was not specified, try the names the
 754          * user provided.
 755          */
 756         do_symlink(from_name, to_name, target_sb);
 757         /* XXX: from_name may point outside of destdir. */
 758         metadata_log(to_name, "link", NULL, from_name, NULL, 0);
 759 }
 760
 761 /*
 762  * install --
 763  *      build a path name and install the file
 764  */
 765 static void
 766 install(const char *from_name, const char *to_name, u_long fset, u_int flags)
 767 {
 768         struct stat from_sb, temp_sb, to_sb;
 769         struct timespec tsb[2];
 770         int devnull, files_match, from_fd, serrno, target;
 771         int tempcopy, temp_fd, to_fd;
 772         char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
 773         char *digestresult;
 774
 775         files_match = 0;
 776         from_fd = -1;
 777         to_fd = -1;
 778
 779         /* If try to install NULL file to a directory, fails. */
 780         if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
 781                 if (!dolink) {
 782                         if (stat(from_name, &from_sb))
 783                                 err(EX_OSERR, "%s", from_name);
 784                         if (!S_ISREG(from_sb.st_mode)) {
 785                                 errno = EFTYPE;
 786                                 err(EX_OSERR, "%s", from_name);
 787                         }
 788                 }
 789                 /* Build the target path. */
 790                 if (flags & DIRECTORY) {
 791                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s%s",
 792                             to_name,
 793                             to_name[strlen(to_name) - 1] == '/' ? "" : "/",
 794                             (p = strrchr(from_name, '/')) ? ++p : from_name);
 795                         to_name = pathbuf;
 796                 }
 797                 devnull = 0;
 798         } else {
 799                 devnull = 1;
 800         }
 801
 802         target = (lstat(to_name, &to_sb) == 0);
 803
 804         if (dolink) {
 805                 if (target && !safecopy) {
 806                         if (to_sb.st_mode & S_IFDIR && rmdir(to_name) == -1)
 807                                 err(EX_OSERR, "%s", to_name);
 808 #if HAVE_STRUCT_STAT_ST_FLAGS
 809                         if (to_sb.st_flags & NOCHANGEBITS)
 810                                 (void)chflags(to_name,
 811                                     to_sb.st_flags & ~NOCHANGEBITS);
 812 #endif
 813                         unlink(to_name);
 814                 }
 815                 makelink(from_name, to_name, target ? &to_sb : NULL);
 816                 return;
 817         }
 818
 819         if (target && !S_ISREG(to_sb.st_mode) && !S_ISLNK(to_sb.st_mode)) {
 820                 errno = EFTYPE;
 821                 warn("%s", to_name);
 822                 return;
 823         }
 824
 825         /* Only copy safe if the target exists. */
 826         tempcopy = safecopy && target;
 827
 828         if (!devnull && (from_fd = open(from_name, O_RDONLY, 0)) < 0)
 829                 err(EX_OSERR, "%s", from_name);
 830
 831         /* If we don't strip, we can compare first. */
 832         if (docompare && !dostrip && target && S_ISREG(to_sb.st_mode)) {
 833                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
 834                         err(EX_OSERR, "%s", to_name);
 835                 if (devnull)
 836                         files_match = to_sb.st_size == 0;
 837                 else
 838                         files_match = !(compare(from_fd, from_name,
 839                             (size_t)from_sb.st_size, to_fd,
 840                             to_name, (size_t)to_sb.st_size, &digestresult));
 841
 842                 /* Close "to" file unless we match. */
 843                 if (!files_match)
 844                         (void)close(to_fd);
 845         }
 846
 847         if (!files_match) {
 848                 if (tempcopy) {
 849                         to_fd = create_tempfile(to_name, tempfile,
 850                             sizeof(tempfile));
 851                         if (to_fd < 0)
 852                                 err(EX_OSERR, "%s", tempfile);
 853                 } else {
 854                         if ((to_fd = create_newfile(to_name, target,
 855                             &to_sb)) < 0)
 856                                 err(EX_OSERR, "%s", to_name);
 857                         if (verbose)
 858                                 (void)printf("install: %s -> %s\n",
 859                                     from_name, to_name);
 860                 }
 861                 if (!devnull)
 862                         digestresult = copy(from_fd, from_name, to_fd,
 863                              tempcopy ? tempfile : to_name, from_sb.st_size);
 864                 else
 865                         digestresult = NULL;
 866         }
 867
 868         if (dostrip) {
 869                 strip(tempcopy ? tempfile : to_name);
 870
 871                 /*
 872                  * Re-open our fd on the target, in case we used a strip
 873                  * that does not work in-place -- like GNU binutils strip.
 874                  */
 875                 close(to_fd);
 876                 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0);
 877                 if (to_fd < 0)
 878                         err(EX_OSERR, "stripping %s", to_name);
 879         }
 880
 881         /*
 882          * Compare the stripped temp file with the target.
 883          */
 884         if (docompare && dostrip && target && S_ISREG(to_sb.st_mode)) {
 885                 temp_fd = to_fd;
 886
 887                 /* Re-open to_fd using the real target name. */
 888                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
 889                         err(EX_OSERR, "%s", to_name);
 890
 891                 if (fstat(temp_fd, &temp_sb)) {
 892                         serrno = errno;
 893                         (void)unlink(tempfile);
 894                         errno = serrno;
 895                         err(EX_OSERR, "%s", tempfile);
 896                 }
 897
 898                 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd,
 899                             to_name, (size_t)to_sb.st_size, &digestresult)
 900                             == 0) {
 901                         /*
 902                          * If target has more than one link we need to
 903                          * replace it in order to snap the extra links.
 904                          * Need to preserve target file times, though.
 905                          */
 906                         if (to_sb.st_nlink != 1) {
 907                                 tsb[0] = to_sb.st_atim;
 908                                 tsb[1] = to_sb.st_mtim;
 909                                 (void)utimensat(AT_FDCWD, tempfile, tsb, 0);
 910                         } else {
 911                                 files_match = 1;
 912                                 (void)unlink(tempfile);
 913                         }
 914                         (void) close(temp_fd);
 915                 }
 916         } else if (dostrip)
 917                 digestresult = digest_file(tempfile);
 918
 919         /*
 920          * Move the new file into place if doing a safe copy
 921          * and the files are different (or just not compared).
 922          */
 923         if (tempcopy && !files_match) {
 924 #if HAVE_STRUCT_STAT_ST_FLAGS
 925                 /* Try to turn off the immutable bits. */
 926                 if (to_sb.st_flags & NOCHANGEBITS)
 927                         (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS);
 928 #endif
 929                 if (dobackup) {
 930                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name,
 931                             suffix) != strlen(to_name) + strlen(suffix)) {
 932                                 unlink(tempfile);
 933                                 errx(EX_OSERR, "%s: backup filename too long",
 934                                     to_name);
 935                         }
 936                         if (verbose)
 937                                 (void)printf("install: %s -> %s\n", to_name, backup);
 938                         if (unlink(backup) < 0 && errno != ENOENT) {
 939                                 serrno = errno;
 940 #if HAVE_STRUCT_STAT_ST_FLAGS
 941                                 if (to_sb.st_flags & NOCHANGEBITS)
 942                                         (void)chflags(to_name, to_sb.st_flags);
 943 #endif
 944                                 unlink(tempfile);
 945                                 errno = serrno;
 946                                 err(EX_OSERR, "unlink: %s", backup);
 947                         }
 948                         if (link(to_name, backup) < 0) {
 949                                 serrno = errno;
 950                                 unlink(tempfile);
 951 #if HAVE_STRUCT_STAT_ST_FLAGS
 952                                 if (to_sb.st_flags & NOCHANGEBITS)
 953                                         (void)chflags(to_name, to_sb.st_flags);
 954 #endif
 955                                 errno = serrno;
 956                                 err(EX_OSERR, "link: %s to %s", to_name,
 957                                      backup);
 958                         }
 959                 }
 960                 if (verbose)
 961                         (void)printf("install: %s -> %s\n", from_name, to_name);
 962                 if (rename(tempfile, to_name) < 0) {
 963                         serrno = errno;
 964                         unlink(tempfile);
 965                         errno = serrno;
 966                         err(EX_OSERR, "rename: %s to %s",
 967                             tempfile, to_name);
 968                 }
 969
 970                 /* Re-open to_fd so we aren't hosed by the rename(2). */
 971                 (void) close(to_fd);
 972                 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0)
 973                         err(EX_OSERR, "%s", to_name);
 974         }
 975
 976         /*
 977          * Preserve the timestamp of the source file if necessary.
 978          */
 979         if (dopreserve && !files_match && !devnull) {
 980                 tsb[0] = from_sb.st_atim;
 981                 tsb[1] = from_sb.st_mtim;
 982                 (void)utimensat(AT_FDCWD, to_name, tsb, 0);
 983         }
 984
 985         if (fstat(to_fd, &to_sb) == -1) {
 986                 serrno = errno;
 987                 (void)unlink(to_name);
 988                 errno = serrno;
 989                 err(EX_OSERR, "%s", to_name);
 990         }
 991
 992         /*
 993          * Set owner, group, mode for target; do the chown first,
 994          * chown may lose the setuid bits.
 995          */
 996         if (!dounpriv && ((gid != (gid_t)-1 && gid != to_sb.st_gid) ||
 997             (uid != (uid_t)-1 && uid != to_sb.st_uid) ||
 998             (mode != (to_sb.st_mode & ALLPERMS)))) {
 999 #if HAVE_STRUCT_STAT_ST_FLAGS
1000                 /* Try to turn off the immutable bits. */
1001                 if (to_sb.st_flags & NOCHANGEBITS)
1002                         (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS);
1003 #endif
1004         }
1005
1006         if (!dounpriv &
1007             (gid != (gid_t)-1 && gid != to_sb.st_gid) ||
1008             (uid != (uid_t)-1 && uid != to_sb.st_uid))
1009                 if (fchown(to_fd, uid, gid) == -1) {
1010                         serrno = errno;
1011                         (void)unlink(to_name);
1012                         errno = serrno;
1013                         err(EX_OSERR,"%s: chown/chgrp", to_name);
1014                 }
1015
1016         if (mode != (to_sb.st_mode & ALLPERMS)) {
1017                 if (fchmod(to_fd,
1018                      dounpriv ? mode & (S_IRWXU|S_IRWXG|S_IRWXO) : mode)) {
1019                         serrno = errno;
1020                         (void)unlink(to_name);
1021                         errno = serrno;
1022                         err(EX_OSERR, "%s: chmod", to_name);
1023                 }
1024         }
1025 #if HAVE_STRUCT_STAT_ST_FLAGS
1026         /*
1027          * If provided a set of flags, set them, otherwise, preserve the
1028          * flags, except for the dump flag.
1029          * NFS does not support flags.  Ignore EOPNOTSUPP flags if we're just
1030          * trying to turn off UF_NODUMP.  If we're trying to set real flags,
1031          * then warn if the fs doesn't support it, otherwise fail.
1032          */
1033         if (!dounpriv & !devnull && (flags & SETFLAGS ||
1034             (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) &&
1035             fchflags(to_fd,
1036             flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
1037                 if (flags & SETFLAGS) {
1038                         if (errno == EOPNOTSUPP)
1039                                 warn("%s: chflags", to_name);
1040                         else {
1041                                 serrno = errno;
1042                                 (void)unlink(to_name);
1043                                 errno = serrno;
1044                                 err(EX_OSERR, "%s: chflags", to_name);
1045                         }
1046                 }
1047         }
1048 #endif
1049
1050         (void)close(to_fd);
1051         if (!devnull)
1052                 (void)close(from_fd);
1053
1054         metadata_log(to_name, "file", tsb, NULL, digestresult, to_sb.st_size);
1055         free(digestresult);
1056 }
1057
1058 /*
1059  * compare --
1060  *      compare two files; non-zero means files differ
1061  */
1062 static int
1063 compare(int from_fd, const char *from_name __unused, size_t from_len,
1064         int to_fd, const char *to_name __unused, size_t to_len,
1065         char **dresp)
1066 {
1067         char *p, *q;
1068         int rv;
1069         int done_compare;
1070         DIGEST_CTX ctx;
1071
1072         rv = 0;
1073         if (from_len != to_len)
1074                 return 1;
1075
1076         if (from_len <= MAX_CMP_SIZE) {
1077                 if (dresp != NULL)
1078                         digest_init(&ctx);
1079                 done_compare = 0;
1080                 if (trymmap(from_fd) && trymmap(to_fd)) {
1081                         p = mmap(NULL, from_len, PROT_READ, MAP_SHARED,
1082                             from_fd, (off_t)0);
1083                         if (p == MAP_FAILED)
1084                                 goto out;
1085                         q = mmap(NULL, from_len, PROT_READ, MAP_SHARED,
1086                             to_fd, (off_t)0);
1087                         if (q == MAP_FAILED) {
1088                                 munmap(p, from_len);
1089                                 goto out;
1090                         }
1091
1092                         rv = memcmp(p, q, from_len);
1093                         if (dresp != NULL)
1094                                 digest_update(&ctx, p, from_len);
1095                         munmap(p, from_len);
1096                         munmap(q, from_len);
1097                         done_compare = 1;
1098                 }
1099         out:
1100                 if (!done_compare) {
1101                         char buf1[MAXBSIZE];
1102                         char buf2[MAXBSIZE];
1103                         int n1, n2;
1104
1105                         rv = 0;
1106                         lseek(from_fd, 0, SEEK_SET);
1107                         lseek(to_fd, 0, SEEK_SET);
1108                         while (rv == 0) {
1109                                 n1 = read(from_fd, buf1, sizeof(buf1));
1110                                 if (n1 == 0)
1111                                         break;          /* EOF */
1112                                 else if (n1 > 0) {
1113                                         n2 = read(to_fd, buf2, n1);
1114                                         if (n2 == n1)
1115                                                 rv = memcmp(buf1, buf2, n1);
1116                                         else
1117                                                 rv = 1; /* out of sync */
1118                                 } else
1119                                         rv = 1;         /* read failure */
1120                                 digest_update(&ctx, buf1, n1);
1121                         }
1122                         lseek(from_fd, 0, SEEK_SET);
1123                         lseek(to_fd, 0, SEEK_SET);
1124                 }
1125         } else
1126                 rv = 1; /* don't bother in this case */
1127
1128         if (dresp != NULL) {
1129                 if (rv == 0)
1130                         *dresp = digest_end(&ctx, NULL);
1131                 else
1132                         (void)digest_end(&ctx, NULL);
1133         }
1134
1135         return rv;
1136 }
1137
1138 /*
1139  * create_tempfile --
1140  *      create a temporary file based on path and open it
1141  */
1142 static int
1143 create_tempfile(const char *path, char *temp, size_t tsize)
1144 {
1145         char *p;
1146
1147         (void)strncpy(temp, path, tsize);
1148         temp[tsize - 1] = '\0';
1149         if ((p = strrchr(temp, '/')) != NULL)
1150                 p++;
1151         else
1152                 p = temp;
1153         (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p);
1154         temp[tsize - 1] = '\0';
1155         return (mkstemp(temp));
1156 }
1157
1158 /*
1159  * create_newfile --
1160  *      create a new file, overwriting an existing one if necessary
1161  */
1162 static int
1163 create_newfile(const char *path, int target, struct stat *sbp)
1164 {
1165         char backup[MAXPATHLEN];
1166         int saved_errno = 0;
1167         int newfd;
1168
1169         if (target) {
1170                 /*
1171                  * Unlink now... avoid ETXTBSY errors later.  Try to turn
1172                  * off the append/immutable bits -- if we fail, go ahead,
1173                  * it might work.
1174                  */
1175 #if HAVE_STRUCT_STAT_ST_FLAGS
1176                 if (sbp->st_flags & NOCHANGEBITS)
1177                         (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS);
1178 #endif
1179
1180                 if (dobackup) {
1181                         if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s",
1182                             path, suffix) != strlen(path) + strlen(suffix)) {
1183                                 saved_errno = errno;
1184 #if HAVE_STRUCT_STAT_ST_FLAGS
1185                                 if (sbp->st_flags & NOCHANGEBITS)
1186                                         (void)chflags(path, sbp->st_flags);
1187 #endif
1188                                 errno = saved_errno;
1189                                 errx(EX_OSERR, "%s: backup filename too long",
1190                                     path);
1191                         }
1192                         (void)snprintf(backup, MAXPATHLEN, "%s%s",
1193                             path, suffix);
1194                         if (verbose)
1195                                 (void)printf("install: %s -> %s\n",
1196                                     path, backup);
1197                         if (rename(path, backup) < 0) {
1198                                 saved_errno = errno;
1199 #if HAVE_STRUCT_STAT_ST_FLAGS
1200                                 if (sbp->st_flags & NOCHANGEBITS)
1201                                         (void)chflags(path, sbp->st_flags);
1202 #endif
1203                                 errno = saved_errno;
1204                                 err(EX_OSERR, "rename: %s to %s", path, backup);
1205                         }
1206                 } else
1207                         if (unlink(path) < 0)
1208                                 saved_errno = errno;
1209         }
1210
1211         newfd = open(path, O_CREAT | O_RDWR | O_TRUNC, S_IRUSR | S_IWUSR);
1212         if (newfd < 0 && saved_errno != 0)
1213                 errno = saved_errno;
1214         return newfd;
1215 }
1216
1217 /*
1218  * copy --
1219  *      copy from one file to another
1220  */
1221 static char *
1222 copy(int from_fd, const char *from_name, int to_fd, const char *to_name,
1223     off_t size)
1224 {
1225         int nr, nw;
1226         int serrno;
1227         char *p;
1228         char buf[MAXBSIZE];
1229         int done_copy;
1230         DIGEST_CTX ctx;
1231
1232         /* Rewind file descriptors. */
1233         if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1234                 err(EX_OSERR, "lseek: %s", from_name);
1235         if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1236                 err(EX_OSERR, "lseek: %s", to_name);
1237
1238         digest_init(&ctx);
1239
1240         /*
1241          * Mmap and write if less than 8M (the limit is so we don't totally
1242          * trash memory on big files.  This is really a minor hack, but it
1243          * wins some CPU back.
1244          */
1245         done_copy = 0;
1246         if (size <= 8 * 1048576 && trymmap(from_fd) &&
1247             (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED,
1248                     from_fd, (off_t)0)) != MAP_FAILED) {
1249                 nw = write(to_fd, p, size);
1250                 if (nw != size) {
1251                         serrno = errno;
1252                         (void)unlink(to_name);
1253                         if (nw >= 0) {
1254                                 errx(EX_OSERR,
1255      "short write to %s: %jd bytes written, %jd bytes asked to write",
1256                                     to_name, (uintmax_t)nw, (uintmax_t)size);
1257                         } else {
1258                                 errno = serrno;
1259                                 err(EX_OSERR, "%s", to_name);
1260                         }
1261                 }
1262                 digest_update(&ctx, p, size);
1263                 (void)munmap(p, size);
1264                 done_copy = 1;
1265         }
1266         if (!done_copy) {
1267                 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) {
1268                         if ((nw = write(to_fd, buf, nr)) != nr) {
1269                                 serrno = errno;
1270                                 (void)unlink(to_name);
1271                                 if (nw >= 0) {
1272                                         errx(EX_OSERR,
1273      "short write to %s: %jd bytes written, %jd bytes asked to write",
1274                                             to_name, (uintmax_t)nw,
1275                                             (uintmax_t)size);
1276                                 } else {
1277                                         errno = serrno;
1278                                         err(EX_OSERR, "%s", to_name);
1279                                 }
1280                         }
1281                         digest_update(&ctx, buf, nr);
1282                 }
1283                 if (nr != 0) {
1284                         serrno = errno;
1285                         (void)unlink(to_name);
1286                         errno = serrno;
1287                         err(EX_OSERR, "%s", from_name);
1288                 }
1289         }
1290         if (safecopy && fsync(to_fd) == -1) {
1291                 serrno = errno;
1292                 (void)unlink(to_name);
1293                 errno = serrno;
1294                 err(EX_OSERR, "fsync failed for %s", to_name);
1295         }
1296         return (digest_end(&ctx, NULL));
1297 }
1298
1299 /*
1300  * strip --
1301  *      use strip(1) to strip the target file
1302  */
1303 static void
1304 strip(const char *to_name)
1305 {
1306         const char *stripbin;
1307         const char *args[3];
1308         pid_t pid;
1309         int error, status;
1310
1311         stripbin = getenv("STRIPBIN");
1312         if (stripbin == NULL)
1313                 stripbin = "strip";
1314         args[0] = stripbin;
1315         args[1] = to_name;
1316         args[2] = NULL;
1317         error = posix_spawnp(&pid, stripbin, NULL, NULL,
1318             __DECONST(char **, args), environ);
1319         if (error != 0) {
1320                 (void)unlink(to_name);
1321                 errc(error == EAGAIN || error == EPROCLIM || error == ENOMEM ?
1322                     EX_TEMPFAIL : EX_OSERR, error, "spawn %s", stripbin);
1323         }
1324         if (waitpid(pid, &status, 0) == -1) {
1325                 error = errno;
1326                 (void)unlink(to_name);
1327                 errc(EX_SOFTWARE, error, "wait");
1328                 /* NOTREACHED */
1329         }
1330         if (status != 0) {
1331                 (void)unlink(to_name);
1332                 errx(EX_SOFTWARE, "strip command %s failed on %s",
1333                     stripbin, to_name);
1334         }
1335 }
1336
1337 /*
1338  * install_dir --
1339  *      build directory hierarchy
1340  */
1341 static void
1342 install_dir(char *path)
1343 {
1344         char *p;
1345         struct stat sb;
1346         int ch, tried_mkdir;
1347
1348         for (p = path;; ++p)
1349                 if (!*p || (p != path && *p  == '/')) {
1350                         tried_mkdir = 0;
1351                         ch = *p;
1352                         *p = '\0';
1353 again:
1354                         if (stat(path, &sb) < 0) {
1355                                 if (errno != ENOENT || tried_mkdir)
1356                                         err(EX_OSERR, "stat %s", path);
1357                                 if (mkdir(path, 0755) < 0) {
1358                                         tried_mkdir = 1;
1359                                         if (errno == EEXIST)
1360                                                 goto again;
1361                                         err(EX_OSERR, "mkdir %s", path);
1362                                 }
1363                                 if (verbose)
1364                                         (void)printf("install: mkdir %s\n",
1365                                             path);
1366                         } else if (!S_ISDIR(sb.st_mode))
1367                                 errx(EX_OSERR, "%s exists but is not a directory", path);
1368                         if (!(*p = ch))
1369                                 break;
1370                 }
1371
1372         if (!dounpriv) {
1373                 if ((gid != (gid_t)-1 || uid != (uid_t)-1) &&
1374                     chown(path, uid, gid))
1375                         warn("chown %u:%u %s", uid, gid, path);
1376                 /* XXXBED: should we do the chmod in the dounpriv case? */
1377                 if (chmod(path, mode))
1378                         warn("chmod %o %s", mode, path);
1379         }
1380         metadata_log(path, "dir", NULL, NULL, NULL, 0);
1381 }
1382
1383 /*
1384  * metadata_log --
1385  *      if metafp is not NULL, output mtree(8) full path name and settings to
1386  *      metafp, to allow permissions to be set correctly by other tools,
1387  *      or to allow integrity checks to be performed.
1388  */
1389 static void
1390 metadata_log(const char *path, const char *type, struct timespec *ts,
1391         const char *slink, const char *digestresult, off_t size)
1392 {
1393         static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' };
1394         const char *p;
1395         char *buf;
1396         size_t destlen;
1397         struct flock metalog_lock;
1398
1399         if (!metafp)
1400                 return;
1401         /* Buffer for strsvis(3). */
1402         buf = (char *)malloc(4 * strlen(path) + 1);
1403         if (buf == NULL) {
1404                 warnx("%s", strerror(ENOMEM));
1405                 return;
1406         }
1407
1408         /* Lock log file. */
1409         metalog_lock.l_start = 0;
1410         metalog_lock.l_len = 0;
1411         metalog_lock.l_whence = SEEK_SET;
1412         metalog_lock.l_type = F_WRLCK;
1413         if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) {
1414                 warn("can't lock %s", metafile);
1415                 free(buf);
1416                 return;
1417         }
1418
1419         /* Remove destdir. */
1420         p = path;
1421         if (destdir) {
1422                 destlen = strlen(destdir);
1423                 if (strncmp(p, destdir, destlen) == 0 &&
1424                     (p[destlen] == '/' || p[destlen] == '\0'))
1425                         p += destlen;
1426         }
1427         while (*p && *p == '/')
1428                 p++;
1429         strsvis(buf, p, VIS_OCTAL, extra);
1430         p = buf;
1431         /* Print details. */
1432         fprintf(metafp, ".%s%s type=%s", *p ? "/" : "", p, type);
1433         if (owner)
1434                 fprintf(metafp, " uname=%s", owner);
1435         if (group)
1436                 fprintf(metafp, " gname=%s", group);
1437         fprintf(metafp, " mode=%#o", mode);
1438         if (slink) {
1439                 strsvis(buf, slink, VIS_CSTYLE, extra); /* encode link */
1440                 fprintf(metafp, " link=%s", buf);
1441         }
1442         if (*type == 'f') /* type=file */
1443                 fprintf(metafp, " size=%lld", (long long)size);
1444         if (ts != NULL && dopreserve)
1445                 fprintf(metafp, " time=%lld.%09ld",
1446                         (long long)ts[1].tv_sec, ts[1].tv_nsec);
1447         if (digestresult && digest)
1448                 fprintf(metafp, " %s=%s", digest, digestresult);
1449         if (fflags)
1450                 fprintf(metafp, " flags=%s", fflags);
1451         if (tags)
1452                 fprintf(metafp, " tags=%s", tags);
1453         fputc('\n', metafp);
1454         /* Flush line. */
1455         fflush(metafp);
1456
1457         /* Unlock log file. */
1458         metalog_lock.l_type = F_UNLCK;
1459         if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1)
1460                 warn("can't unlock %s", metafile);
1461         free(buf);
1462 }
1463
1464 /*
1465  * usage --
1466  *      print a usage message and die
1467  */
1468 static void
1469 usage(void)
1470 {
1471         (void)fprintf(stderr,
1472 "usage: install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n"
1473 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1474 "               [-B suffix] [-l linkflags] [-N dbdir]\n"
1475 "               file1 file2\n"
1476 "       install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n"
1477 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1478 "               [-B suffix] [-l linkflags] [-N dbdir]\n"
1479 "               file1 ... fileN directory\n"
1480 "       install -dU [-vU] [-g group] [-m mode] [-N dbdir] [-o owner]\n"
1481 "               [-M log] [-D dest] [-h hash] [-T tags]\n"
1482 "               directory ...\n");
1483         exit(EX_USAGE);
1484         /* NOTREACHED */
1485 }
1486
1487 /*
1488  * trymmap --
1489  *      return true (1) if mmap should be tried, false (0) if not.
1490  */
1491 static int
1492 trymmap(int fd)
1493 {
1494 /*
1495  * The ifdef is for bootstrapping - f_fstypename doesn't exist in
1496  * pre-Lite2-merge systems.
1497  */
1498 #ifdef MFSNAMELEN
1499         struct statfs stfs;
1500
1501         if (fstatfs(fd, &stfs) != 0)
1502                 return (0);
1503         if (strcmp(stfs.f_fstypename, "ufs") == 0 ||
1504             strcmp(stfs.f_fstypename, "cd9660") == 0)
1505                 return (1);
1506 #endif
1507         return (0);
1508 }