bin/cpdup/cpdup.c

   1 /*-
   2  * CPDUP.C
   3  *
   4  * CPDUP <options> source destination
   5  *
   6  * (c) Copyright 1997-1999 by Matthew Dillon and Dima Ruban.  Permission to
   7  *     use and distribute based on the FreeBSD copyright.  Supplied as-is,
   8  *     USE WITH EXTREME CAUTION.
   9  *
  10  * This program attempts to duplicate the source onto the destination as
  11  * exactly as possible, retaining modify times, flags, perms, uid, and gid.
  12  * It can duplicate devices, files (including hardlinks), softlinks,
  13  * directories, and so forth.  It is recursive by default!  The duplication
  14  * is inclusive of removal of files/directories on the destination that do
  15  * not exist on the source.  This program supports a per-directory exception
  16  * file called .cpignore, or a user-specified exception file.
  17  *
  18  * Safety features:
  19  *
  20  *      - does not cross partition boundries on source
  21  *      - asks for confirmation on deletions unless -i0 is specified
  22  *      - refuses to replace a destination directory with a source file
  23  *        unless -s0 is specified.
  24  *      - terminates on error
  25  *
  26  * Copying features:
  27  *
  28  *      - does not copy file if mtime, flags, perms, and size match unless
  29  *        forced
  30  *
  31  *      - copies to temporary and renames-over the original, allowing
  32  *        you to update live systems
  33  *
  34  *      - copies uid, gid, mtime, perms, flags, softlinks, devices, hardlinks,
  35  *        and recurses through directories.
  36  *
  37  *      - accesses a per-directory exclusion file, .cpignore, containing
  38  *        standard wildcarded ( ? / * style, NOT regex) exclusions.
  39  *
  40  *      - tries to play permissions and flags smart in regards to overwriting
  41  *        schg files and doing related stuff.
  42  *
  43  *      - Can do MD5 consistancy checks
  44  *
  45  *      - Is able to do incremental mirroring/backups via hardlinks from
  46  *        the 'previous' version (supplied with -H path).
  47  *
  48  * $DragonFly: src/bin/cpdup/cpdup.c,v 1.32 2008/11/11 04:36:00 dillon Exp $
  49  */
  50
  51 /*-
  52  * Example: cc -O cpdup.c -o cpdup -lmd
  53  *
  54  * ".MD5.CHECKSUMS" contains md5 checksumms for the current directory.
  55  * This file is stored on the source.
  56  */
  57
  58 #include "cpdup.h"
  59 #include "hclink.h"
  60 #include "hcproto.h"
  61
  62 #define HSIZE   8192
  63 #define HMASK   (HSIZE-1)
  64 #define HLSIZE  8192
  65 #define HLMASK  (HLSIZE - 1)
  66
  67 #define GETBUFSIZE      8192
  68 #define GETPATHSIZE     2048
  69 #define GETLINKSIZE     1024
  70 #define GETIOSIZE       65536
  71
  72 #ifndef _ST_FLAGS_PRESENT_
  73 #define st_flags        st_mode
  74 #endif
  75
  76 typedef struct Node {
  77     struct Node *no_Next;
  78     struct Node *no_HNext;
  79     struct stat *no_Stat;
  80     int  no_Value;
  81     char no_Name[4];
  82 } Node;
  83
  84 typedef struct List {
  85     Node        li_Node;
  86     Node        *li_Hash[HSIZE];
  87 } List;
  88
  89 struct hlink {
  90     ino_t ino;
  91     ino_t dino;
  92     int refs;
  93     struct hlink *next;
  94     struct hlink *prev;
  95     nlink_t nlinked;
  96     char name[];
  97 };
  98
  99 typedef struct copy_info {
 100         char *spath;
 101         char *dpath;
 102         dev_t sdevNo;
 103         dev_t ddevNo;
 104 } *copy_info_t;
 105
 106 static struct hlink *hltable[HLSIZE];
 107
 108 static void RemoveRecur(const char *dpath, dev_t devNo, struct stat *dstat);
 109 static void InitList(List *list);
 110 static void ResetList(List *list);
 111 static Node *IterateList(List *list, Node *node, int n);
 112 static int AddList(List *list, const char *name, int n, struct stat *st);
 113 static int CheckList(List *list, const char *path, const char *name);
 114 static int getbool(const char *str);
 115 static char *SplitRemote(char **pathp);
 116 static int ChgrpAllowed(gid_t g);
 117 static int OwnerMatch(struct stat *st1, struct stat *st2);
 118 #ifdef _ST_FLAGS_PRESENT_
 119 static int FlagsMatch(struct stat *st1, struct stat *st2);
 120 #else
 121 #define FlagsMatch(st1, st2)    1
 122 #endif
 123 static struct hlink *hltlookup(struct stat *);
 124 static struct hlink *hltadd(struct stat *, const char *);
 125 static char *checkHLPath(struct stat *st, const char *spath, const char *dpath);
 126 static int validate_check(const char *spath, const char *dpath);
 127 static int shash(const char *s);
 128 static void hltdelete(struct hlink *);
 129 static void hltsetdino(struct hlink *, ino_t);
 130 static int YesNo(const char *path);
 131 static int xrename(const char *src, const char *dst, u_long flags);
 132 static int xlink(const char *src, const char *dst, u_long flags);
 133 static int xremove(struct HostConf *host, const char *path);
 134 static int xrmdir(struct HostConf *host, const char *path);
 135 static int DoCopy(copy_info_t info, struct stat *stat1, int depth);
 136 static int ScanDir(List *list, struct HostConf *host, const char *path,
 137         int64_t *CountReadBytes, int n);
 138
 139 int AskConfirmation = 1;
 140 int SafetyOpt = 1;
 141 int ForceOpt;
 142 int DeviceOpt = 1;
 143 int VerboseOpt;
 144 int DirShowOpt;
 145 int NotForRealOpt;
 146 int QuietOpt;
 147 int NoRemoveOpt;
 148 int UseMD5Opt;
 149 int UseFSMIDOpt;
 150 int SummaryOpt;
 151 int CompressOpt;
 152 int SlaveOpt;
 153 int ReadOnlyOpt;
 154 int ValidateOpt;
 155 int ssh_argc;
 156 const char *ssh_argv[16];
 157 int DstRootPrivs;
 158
 159 const char *UseCpFile;
 160 const char *MD5CacheFile;
 161 const char *FSMIDCacheFile;
 162 const char *UseHLPath;
 163
 164 static int DstBaseLen;
 165 static int HardLinkCount;
 166 static int GroupCount;
 167 static gid_t *GroupList;
 168
 169 int64_t CountSourceBytes;
 170 int64_t CountSourceItems;
 171 int64_t CountCopiedItems;
 172 int64_t CountSourceReadBytes;
 173 int64_t CountTargetReadBytes;
 174 int64_t CountWriteBytes;
 175 int64_t CountRemovedItems;
 176 int64_t CountLinkedItems;
 177
 178 static struct HostConf SrcHost;
 179 static struct HostConf DstHost;
 180
 181 int
 182 main(int ac, char **av)
 183 {
 184     int i;
 185     int opt;
 186     char *src = NULL;
 187     char *dst = NULL;
 188     char *ptr;
 189     struct timeval start;
 190     struct copy_info info;
 191
 192     signal(SIGPIPE, SIG_IGN);
 193
 194     gettimeofday(&start, NULL);
 195     opterr = 0;
 196     while ((opt = getopt(ac, av, ":CdnF:fH:Ii:j:K:klM:mopqRSs:uVvX:x")) != -1) {
 197         switch (opt) {
 198         /* TODO: sort the branches */
 199         case 'C':
 200             CompressOpt = 1;
 201             break;
 202         case 'v':
 203             ++VerboseOpt;
 204             break;
 205         case 'd':
 206             DirShowOpt = 1;
 207             break;
 208         case 'n':
 209             NotForRealOpt = 1;
 210             break;
 211         case 'l':
 212             setlinebuf(stdout);
 213             setlinebuf(stderr);
 214             break;
 215         case 'V':
 216             ++ValidateOpt;
 217             break;
 218         case 'I':
 219             SummaryOpt = 1;
 220             break;
 221         case 'o':
 222             NoRemoveOpt = 1;
 223             break;
 224         case 'x':
 225             UseCpFile = ".cpignore";
 226             break;
 227         case 'X':
 228             UseCpFile = optarg;
 229             break;
 230         case 'H':
 231             UseHLPath = optarg;
 232             break;
 233         case 'F':
 234             if (ssh_argc >= 16)
 235                 fatal("too many -F options");
 236             ssh_argv[ssh_argc++] = optarg;
 237             break;
 238         case 'S':
 239             SlaveOpt = 1;
 240             break;
 241         case 'R':
 242             ReadOnlyOpt = 1;
 243             break;
 244         case 'f':
 245             ForceOpt = 1;
 246             break;
 247         case 'i':
 248             AskConfirmation = getbool(optarg);
 249             break;
 250         case 'j':
 251             DeviceOpt = getbool(optarg);
 252             break;
 253         case 's':
 254             SafetyOpt = getbool(optarg);
 255             break;
 256         case 'q':
 257             QuietOpt = 1;
 258             break;
 259         case 'k':
 260             UseFSMIDOpt = 1;
 261             FSMIDCacheFile = ".FSMID.CHECK";
 262             break;
 263         case 'K':
 264             UseFSMIDOpt = 1;
 265             FSMIDCacheFile = optarg;
 266             break;
 267         case 'M':
 268             UseMD5Opt = 1;
 269             MD5CacheFile = optarg;
 270             break;
 271         case 'm':
 272             UseMD5Opt = 1;
 273             MD5CacheFile = ".MD5.CHECKSUMS";
 274             break;
 275         case 'u':
 276             setvbuf(stdout, NULL, _IOLBF, 0);
 277             break;
 278         case ':':
 279             fatal("missing argument for option: -%c\n", optopt);
 280             /* not reached */
 281             break;
 282         case '?':
 283             fatal("illegal option: -%c\n", optopt);
 284             /* not reached */
 285             break;
 286         default:
 287             fatal(NULL);
 288             /* not reached */
 289             break;
 290         }
 291     }
 292     ac -= optind;
 293     av += optind;
 294     if (ac > 0)
 295         src = av[0];
 296     if (ac > 1)
 297         dst = av[1];
 298     if (ac > 2)
 299         fatal("too many arguments");
 300
 301     /*
 302      * If we are told to go into slave mode, run the HC protocol
 303      */
 304     if (SlaveOpt) {
 305         DstRootPrivs = (geteuid() == 0);
 306         hc_slave(0, 1);
 307         exit(0);
 308     }
 309
 310     /*
 311      * Extract the source and/or/neither target [user@]host and
 312      * make any required connections.
 313      */
 314     if (src && (ptr = SplitRemote(&src)) != NULL) {
 315         SrcHost.host = src;
 316         src = ptr;
 317         if (UseMD5Opt)
 318             fatal("The MD5 options are not currently supported for remote sources");
 319         if (hc_connect(&SrcHost, ReadOnlyOpt) < 0)
 320             exit(1);
 321     } else if (ReadOnlyOpt)
 322         fatal("The -R option is only supported for remote sources");
 323
 324     if (dst && (ptr = SplitRemote(&dst)) != NULL) {
 325         DstHost.host = dst;
 326         dst = ptr;
 327         if (UseFSMIDOpt)
 328             fatal("The FSMID options are not currently supported for remote targets");
 329         if (hc_connect(&DstHost, 0) < 0)
 330             exit(1);
 331     }
 332
 333     /*
 334      * dst may be NULL only if -m option is specified,
 335      * which forces an update of the MD5 checksums
 336      */
 337     if (dst == NULL && UseMD5Opt == 0) {
 338         fatal(NULL);
 339         /* not reached */
 340     }
 341
 342     if (dst) {
 343         DstRootPrivs = (hc_geteuid(&DstHost) == 0);
 344         if (!DstRootPrivs)
 345             GroupCount = hc_getgroups(&DstHost, &GroupList);
 346     }
 347 #if 0
 348     /* XXXX DEBUG */
 349     fprintf(stderr, "DstRootPrivs == %s\n", DstRootPrivs ? "true" : "false");
 350     fprintf(stderr, "GroupCount == %d\n", GroupCount);
 351     for (i = 0; i < GroupCount; i++)
 352         fprintf(stderr, "Group[%d] == %d\n", i, GroupList[i]);
 353 #endif
 354
 355     bzero(&info, sizeof(info));
 356     if (dst) {
 357         DstBaseLen = strlen(dst);
 358         info.spath = src;
 359         info.dpath = dst;
 360         info.sdevNo = (dev_t)-1;
 361         info.ddevNo = (dev_t)-1;
 362         i = DoCopy(&info, NULL, -1);
 363     } else {
 364         info.spath = src;
 365         info.dpath = NULL;
 366         info.sdevNo = (dev_t)-1;
 367         info.ddevNo = (dev_t)-1;
 368         i = DoCopy(&info, NULL, -1);
 369     }
 370 #ifndef NOMD5
 371     md5_flush();
 372 #endif
 373     fsmid_flush();
 374
 375     if (SummaryOpt && i == 0) {
 376         double duration;
 377         struct timeval end;
 378
 379         gettimeofday(&end, NULL);
 380 #if 0
 381         /* don't count stat's in our byte statistics */
 382         CountSourceBytes += sizeof(struct stat) * CountSourceItems;
 383         CountSourceReadBytes += sizeof(struct stat) * CountSourceItems;
 384         CountWriteBytes +=  sizeof(struct stat) * CountCopiedItems;
 385         CountWriteBytes +=  sizeof(struct stat) * CountRemovedItems;
 386 #endif
 387
 388         duration = (end.tv_sec - start.tv_sec);
 389         duration += (double)(end.tv_usec - start.tv_usec) / 1000000.0;
 390         if (duration == 0.0)
 391                 duration = 1.0;
 392         logstd("cpdup completed successfully\n");
 393         logstd("%lld bytes source, %lld src bytes read, %lld tgt bytes read\n"
 394                "%lld bytes written (%.1fX speedup)\n",
 395             (long long)CountSourceBytes,
 396             (long long)CountSourceReadBytes,
 397             (long long)CountTargetReadBytes,
 398             (long long)CountWriteBytes,
 399             ((double)CountSourceBytes * 2.0) / ((double)(CountSourceReadBytes + CountTargetReadBytes + CountWriteBytes)));
 400         logstd("%lld source items, %lld items copied, %lld items linked, "
 401                "%lld things deleted\n",
 402             (long long)CountSourceItems,
 403             (long long)CountCopiedItems,
 404             (long long)CountLinkedItems,
 405             (long long)CountRemovedItems);
 406         logstd("%.1f seconds %5d Kbytes/sec synced %5d Kbytes/sec scanned\n",
 407             duration,
 408             (int)((CountSourceReadBytes + CountTargetReadBytes + CountWriteBytes) / duration  / 1024.0),
 409             (int)(CountSourceBytes / duration / 1024.0));
 410     }
 411     exit((i == 0) ? 0 : 1);
 412 }
 413
 414 static int
 415 getbool(const char *str)
 416 {
 417     if (strcmp(str, "0") == 0)
 418         return (0);
 419     if (strcmp(str, "1") == 0)
 420         return (1);
 421     fatal("option requires boolean argument (0 or 1): -%c\n", optopt);
 422     /* not reached */
 423     return (0);
 424 }
 425
 426 /*
 427  * Check if path specifies a remote path, using the same syntax as scp(1),
 428  * i.e. a path is considered remote if the first colon is not preceded by
 429  * a slash, so e.g. "./foo:bar" is considered local.
 430  * If a remote path is detected, the colon is replaced with a null byte,
 431  * and the return value is a pointer to the next character.
 432  * Otherwise NULL is returned.
 433  *
 434  * A path prefix of localhost is the same as a locally specified file or
 435  * directory path, but prevents any further interpretation of the path
 436  * as being a remote hostname (for paths that have colons in them).
 437  */
 438 static char *
 439 SplitRemote(char **pathp)
 440 {
 441     int cindex;
 442     char *path = *pathp;
 443
 444     if (path[(cindex = strcspn(path, ":/"))] == ':') {
 445         path[cindex++] = 0;
 446         if (strcmp(path, "localhost") != 0)
 447                 return (path + cindex);
 448         *pathp = path + cindex;
 449     }
 450     return (NULL);
 451 }
 452
 453 /*
 454  * Check if group g is in our GroupList.
 455  *
 456  * Typically the number of groups a user belongs to isn't large
 457  * enough to warrant more effort than a simple linear search.
 458  * However, we perform an optimization by moving a group to the
 459  * top of the list when we have a hit.  This assumes that there
 460  * isn't much variance in the gids of files that a non-root user
 461  * copies.  So most of the time the search will terminate on the
 462  * first element of the list.
 463  */
 464 static int
 465 ChgrpAllowed(gid_t g)
 466 {
 467     int i;
 468
 469     for (i = 0; i < GroupCount; i++)
 470         if (GroupList[i] == g) {
 471             if (i > 0) {
 472                 /* Optimize: Move g to the front of the list. */
 473                 for (; i > 0; i--)
 474                     GroupList[i] = GroupList[i - 1];
 475                 GroupList[0] = g;
 476             }
 477             return (1);
 478         }
 479     return (0);
 480 }
 481
 482 /*
 483  * The following two functions return true if the ownership (UID + GID)
 484  * or the flags of two files match, respectively.
 485  *
 486  * Only perform weak checking if we don't have sufficient privileges on
 487  * the target machine, so we don't waste transfers with things that are
 488  * bound to fail anyway.
 489  */
 490 static int
 491 OwnerMatch(struct stat *st1, struct stat *st2)
 492 {
 493     if (DstRootPrivs)
 494         /* Both UID and GID must match. */
 495         return (st1->st_uid == st2->st_uid && st1->st_gid == st2->st_gid);
 496     else
 497         /* Ignore UID, and also ignore GID if we can't chgrp to that group. */
 498         return (st1->st_gid == st2->st_gid || !ChgrpAllowed(st1->st_gid));
 499 }
 500
 501 #ifdef _ST_FLAGS_PRESENT_
 502 static int
 503 FlagsMatch(struct stat *st1, struct stat *st2)
 504 {
 505 /*
 506  * Ignore UF_ARCHIVE.  It gets set automatically by the filesystem, for
 507  * filesystems that support it.  If the destination filesystem supports it, but
 508  * it's cleared on the source file, then multiple invocations of cpdup would
 509  * all try to copy the file because the flags wouldn't match.
 510  *
 511  * When unpriveleged, ignore flags we can't set
 512  */
 513     u_long ignored = DstRootPrivs ? 0 : SF_SETTABLE;
 514
 515 #ifdef UF_ARCHIVE
 516     ignored |= UF_ARCHIVE;
 517 #endif
 518     return (((st1->st_flags ^ st2->st_flags) & ~ignored) == 0);
 519 }
 520 #endif
 521
 522
 523 static struct hlink *
 524 hltlookup(struct stat *stp)
 525 {
 526     struct hlink *hl;
 527     int n;
 528
 529     n = stp->st_ino & HLMASK;
 530
 531     for (hl = hltable[n]; hl; hl = hl->next) {
 532         if (hl->ino == stp->st_ino) {
 533             ++hl->refs;
 534             return hl;
 535         }
 536     }
 537
 538     return NULL;
 539 }
 540
 541 static struct hlink *
 542 hltadd(struct stat *stp, const char *path)
 543 {
 544     struct hlink *new;
 545     int plen = strlen(path);
 546     int n;
 547
 548     new = malloc(offsetof(struct hlink, name[plen + 1]));
 549     if (new == NULL)
 550         fatal("out of memory");
 551     ++HardLinkCount;
 552
 553     /* initialize and link the new element into the table */
 554     new->ino = stp->st_ino;
 555     new->dino = (ino_t)-1;
 556     new->refs = 1;
 557     bcopy(path, new->name, plen + 1);
 558     new->nlinked = 1;
 559     new->prev = NULL;
 560     n = stp->st_ino & HLMASK;
 561     new->next = hltable[n];
 562     if (hltable[n])
 563         hltable[n]->prev = new;
 564     hltable[n] = new;
 565
 566     return new;
 567 }
 568
 569 static void
 570 hltsetdino(struct hlink *hl, ino_t inum)
 571 {
 572     hl->dino = inum;
 573 }
 574
 575 static void
 576 hltdelete(struct hlink *hl)
 577 {
 578     assert(hl->refs == 1);
 579     --hl->refs;
 580     if (hl->prev) {
 581         if (hl->next)
 582             hl->next->prev = hl->prev;
 583         hl->prev->next = hl->next;
 584     } else {
 585         if (hl->next)
 586             hl->next->prev = NULL;
 587
 588         hltable[hl->ino & HLMASK] = hl->next;
 589     }
 590     --HardLinkCount;
 591     free(hl);
 592 }
 593
 594 static void
 595 hltrels(struct hlink *hl)
 596 {
 597     assert(hl->refs == 1);
 598     --hl->refs;
 599 }
 600
 601 /*
 602  * If UseHLPath is defined check to see if the file in question is
 603  * the same as the source file, and if it is return a pointer to the
 604  * -H path based file for hardlinking.  Else return NULL.
 605  */
 606 static char *
 607 checkHLPath(struct stat *st1, const char *spath, const char *dpath)
 608 {
 609     struct stat sthl;
 610     char *hpath;
 611     int error;
 612
 613     asprintf(&hpath, "%s%s", UseHLPath, dpath + DstBaseLen);
 614
 615     /*
 616      * stat info matches ?
 617      */
 618     if (hc_stat(&DstHost, hpath, &sthl) < 0 ||
 619         st1->st_size != sthl.st_size ||
 620         st1->st_mtime != sthl.st_mtime ||
 621         !OwnerMatch(st1, &sthl) ||
 622         !FlagsMatch(st1, &sthl)
 623     ) {
 624         free(hpath);
 625         return(NULL);
 626     }
 627
 628     /*
 629      * If ForceOpt or ValidateOpt is set we have to compare the files
 630      */
 631     if (ForceOpt || ValidateOpt) {
 632         error = validate_check(spath, hpath);
 633         if (error) {
 634             free(hpath);
 635             hpath = NULL;
 636         }
 637     }
 638     return(hpath);
 639 }
 640
 641 /*
 642  * Return 0 if the contents of the file <spath> matches the contents of
 643  * the file <dpath>.
 644  */
 645 static int
 646 validate_check(const char *spath, const char *dpath)
 647 {
 648     int error;
 649     int fd1;
 650     int fd2;
 651
 652     fd1 = hc_open(&SrcHost, spath, O_RDONLY, 0);
 653     fd2 = hc_open(&DstHost, dpath, O_RDONLY, 0);
 654     error = -1;
 655
 656     if (fd1 >= 0 && fd2 >= 0) {
 657         int n;
 658         int x;
 659         char *iobuf1 = malloc(GETIOSIZE);
 660         char *iobuf2 = malloc(GETIOSIZE);
 661
 662         while ((n = hc_read(&SrcHost, fd1, iobuf1, GETIOSIZE)) > 0) {
 663             CountSourceReadBytes += n;
 664             x = hc_read(&DstHost, fd2, iobuf2, GETIOSIZE);
 665             if (x > 0)
 666                     CountTargetReadBytes += x;
 667             if (x != n)
 668                 break;
 669             if (bcmp(iobuf1, iobuf2, n) != 0)
 670                 break;
 671         }
 672         free(iobuf1);
 673         free(iobuf2);
 674         if (n == 0)
 675             error = 0;
 676     }
 677     if (fd1 >= 0)
 678         hc_close(&SrcHost, fd1);
 679     if (fd2 >= 0)
 680         hc_close(&DstHost, fd2);
 681     return (error);
 682 }
 683
 684 int
 685 DoCopy(copy_info_t info, struct stat *stat1, int depth)
 686 {
 687     const char *spath = info->spath;
 688     const char *dpath = info->dpath;
 689     dev_t sdevNo = info->sdevNo;
 690     dev_t ddevNo = info->ddevNo;
 691     struct stat st1;
 692     struct stat st2;
 693     unsigned long st2_flags;
 694     int r, mres, fres, st2Valid;
 695     struct hlink *hln;
 696     uint64_t size;
 697
 698     r = mres = fres = st2Valid = 0;
 699     st2_flags = 0;
 700     size = 0;
 701     hln = NULL;
 702
 703     if (stat1 == NULL) {
 704         if (hc_lstat(&SrcHost, spath, &st1) != 0) {
 705             r = 1;
 706             goto done;
 707         }
 708         stat1 = &st1;
 709     }
 710 #ifdef SF_SNAPSHOT
 711     /* skip snapshot files because they're sparse and _huge_ */
 712     if (stat1->st_flags & SF_SNAPSHOT)
 713        return(0);
 714 #endif
 715     st2.st_mode = 0;    /* in case lstat fails */
 716     st2.st_flags = 0;   /* in case lstat fails */
 717     if (dpath && hc_lstat(&DstHost, dpath, &st2) == 0) {
 718         st2Valid = 1;
 719 #ifdef _ST_FLAGS_PRESENT_
 720         st2_flags = st2.st_flags;
 721 #endif
 722     }
 723
 724     if (S_ISREG(stat1->st_mode))
 725         size = stat1->st_size;
 726
 727     /*
 728      * Handle hardlinks
 729      */
 730
 731     if (S_ISREG(stat1->st_mode) && stat1->st_nlink > 1 && dpath) {
 732         if ((hln = hltlookup(stat1)) != NULL) {
 733             hln->nlinked++;
 734
 735             if (st2Valid) {
 736                 if (st2.st_ino == hln->dino) {
 737                     /*
 738                      * hard link is already correct, nothing to do
 739                      */
 740                     if (VerboseOpt >= 3)
 741                         logstd("%-32s nochange\n", (dpath) ? dpath : spath);
 742                     if (hln->nlinked == stat1->st_nlink) {
 743                         hltdelete(hln);
 744                         hln = NULL;
 745                     }
 746                     CountSourceItems++;
 747                     r = 0;
 748                     goto done;
 749                 } else {
 750                     /*
 751                      * hard link is not correct, attempt to unlink it
 752                      */
 753                     if (xremove(&DstHost, dpath) < 0) {
 754                         logerr("%-32s hardlink: unable to unlink: %s\n",
 755                             ((dpath) ? dpath : spath), strerror(errno));
 756                         hltdelete(hln);
 757                         hln = NULL;
 758                         ++r;
 759                         goto done;
 760                     }
 761                 }
 762             }
 763
 764             if (xlink(hln->name, dpath, stat1->st_flags) < 0) {
 765                 int tryrelink = (errno == EMLINK);
 766                 logerr("%-32s hardlink: unable to link to %s: %s\n",
 767                     (dpath ? dpath : spath), hln->name, strerror(errno)
 768                 );
 769                 hltdelete(hln);
 770                 hln = NULL;
 771                 if (tryrelink) {
 772                     logerr("%-20s hardlink: will attempt to copy normally\n",
 773                         (dpath ? dpath : spath));
 774                     goto relink;
 775                 }
 776                 ++r;
 777             } else {
 778                 if (hln->nlinked == stat1->st_nlink) {
 779                     hltdelete(hln);
 780                     hln = NULL;
 781                 }
 782                 if (r == 0) {
 783                     if (VerboseOpt) {
 784                         logstd("%-32s hardlink: %s\n",
 785                             (dpath ? dpath : spath),
 786                             (st2Valid ? "relinked" : "linked")
 787                         );
 788                     }
 789                     CountSourceItems++;
 790                     CountCopiedItems++;
 791                     r = 0;
 792                     goto done;
 793                 }
 794             }
 795         } else {
 796             /*
 797              * first instance of hardlink must be copied normally
 798              */
 799 relink:
 800             hln = hltadd(stat1, dpath);
 801         }
 802     }
 803
 804     /*
 805      * Do we need to copy the file/dir/link/whatever?  Early termination
 806      * if we do not.  Always redo links.  Directories are always traversed
 807      * except when the FSMID options are used.
 808      *
 809      * NOTE: st2Valid is true only if dpath != NULL *and* dpath stats good.
 810      */
 811
 812     if (
 813         st2Valid
 814         && stat1->st_mode == st2.st_mode
 815         && FlagsMatch(stat1, &st2)
 816     ) {
 817         if (S_ISLNK(stat1->st_mode) || S_ISDIR(stat1->st_mode)) {
 818             /*
 819              * If FSMID tracking is turned on we can avoid recursing through
 820              * an entire directory subtree if the FSMID matches.
 821              */
 822 #ifdef _ST_FSMID_PRESENT_
 823             if (ForceOpt == 0 &&
 824                 (UseFSMIDOpt && (fres = fsmid_check(stat1->st_fsmid, dpath)) == 0)
 825             ) {
 826                 if (VerboseOpt >= 3) {
 827                     if (UseFSMIDOpt) /* always true!?! */
 828                         logstd("%-32s fsmid-nochange\n", (dpath ? dpath : spath));
 829                     else
 830                         logstd("%-32s nochange\n", (dpath ? dpath : spath));
 831                 }
 832                 r = 0;
 833                 goto done;
 834             }
 835 #endif
 836         } else {
 837             if (ForceOpt == 0 &&
 838                 stat1->st_size == st2.st_size &&
 839                 (ValidateOpt == 2 || stat1->st_mtime == st2.st_mtime) &&
 840                 OwnerMatch(stat1, &st2)
 841 #ifndef NOMD5
 842                 && (UseMD5Opt == 0 || !S_ISREG(stat1->st_mode) ||
 843                     (mres = md5_check(spath, dpath)) == 0)
 844 #endif
 845 #ifdef _ST_FSMID_PRESENT_
 846                 && (UseFSMIDOpt == 0 ||
 847                     (fres = fsmid_check(stat1->st_fsmid, dpath)) == 0)
 848 #endif
 849                 && (ValidateOpt == 0 || !S_ISREG(stat1->st_mode) ||
 850                     validate_check(spath, dpath) == 0)
 851             ) {
 852                 /*
 853                  * The files are identical, but if we are running as
 854                  * root we might need to adjust ownership/group/flags.
 855                  */
 856                 int changedown = 0;
 857                 int changedflags = 0;
 858
 859                 if (hln)
 860                     hltsetdino(hln, st2.st_ino);
 861
 862                 if (!OwnerMatch(stat1, &st2)) {
 863                     hc_chown(&DstHost, dpath, stat1->st_uid, stat1->st_gid);
 864                     changedown = 1;
 865                 }
 866 #ifdef _ST_FLAGS_PRESENT_
 867                 if (!FlagsMatch(stat1, &st2)) {
 868                     hc_chflags(&DstHost, dpath, stat1->st_flags);
 869                     changedflags = 1;
 870                 }
 871 #endif
 872                 if (VerboseOpt >= 3) {
 873 #ifndef NOMD5
 874                     if (UseMD5Opt) {
 875                         logstd("%-32s md5-nochange",
 876                                 (dpath ? dpath : spath));
 877                     } else
 878 #endif
 879                     if (UseFSMIDOpt) {
 880                         logstd("%-32s fsmid-nochange",
 881                                 (dpath ? dpath : spath));
 882                     } else if (ValidateOpt) {
 883                         logstd("%-32s nochange (contents validated)",
 884                                 (dpath ? dpath : spath));
 885                     } else {
 886                         logstd("%-32s nochange", (dpath ? dpath : spath));
 887                     }
 888                     if (changedown)
 889                         logstd(" (uid/gid differ)");
 890                     if (changedflags)
 891                         logstd(" (flags differ)");
 892                     logstd("\n");
 893                 }
 894                 CountSourceBytes += size;
 895                 CountSourceItems++;
 896                 r = 0;
 897                 goto done;
 898             }
 899         }
 900     }
 901     if (st2Valid && !S_ISDIR(stat1->st_mode) && S_ISDIR(st2.st_mode)) {
 902         if (SafetyOpt) {
 903             logerr("%-32s SAFETY - refusing to copy file over directory\n",
 904                 (dpath ? dpath : spath)
 905             );
 906             ++r;                /* XXX */
 907             r = 0;
 908             goto done;          /* continue with the cpdup anyway */
 909         }
 910         if (QuietOpt == 0 || AskConfirmation) {
 911             logstd("%-32s WARNING: non-directory source will blow away\n"
 912                    "%-32s preexisting dest directory, continuing anyway!\n",
 913                    ((dpath) ? dpath : spath), "");
 914         }
 915         if (dpath)
 916             RemoveRecur(dpath, ddevNo, &st2);
 917         st2Valid = 0;
 918     }
 919
 920     /*
 921      * The various comparisons failed, copy it.
 922      */
 923     if (S_ISDIR(stat1->st_mode)) {
 924         int skipdir = 0;
 925
 926         if (fres < 0)
 927             logerr("%-32s/ fsmid-CHECK-FAILED\n", (dpath) ? dpath : spath);
 928
 929         if (dpath) {
 930             if (!st2Valid || S_ISDIR(st2.st_mode) == 0) {
 931                 if (st2Valid)
 932                     xremove(&DstHost, dpath);
 933                 if (hc_mkdir(&DstHost, dpath, stat1->st_mode | 0700) != 0) {
 934                     logerr("%s: mkdir failed: %s\n",
 935                         (dpath ? dpath : spath), strerror(errno));
 936                     r = 1;
 937                     skipdir = 1;
 938                 }
 939                 if (hc_lstat(&DstHost, dpath, &st2) != 0) {
 940                     if (NotForRealOpt == 0)
 941                             logerr("%s: lstat of newly made dir failed: %s\n",
 942                                    (dpath ? dpath : spath), strerror(errno));
 943                     st2Valid = 0;
 944                     r = 1;
 945                     skipdir = 1;
 946                 }
 947                 else {
 948                     st2Valid = 1;
 949                     if (!OwnerMatch(stat1, &st2) &&
 950                         hc_chown(&DstHost, dpath, stat1->st_uid, stat1->st_gid) != 0
 951                     ) {
 952                         logerr("%s: chown of newly made dir failed: %s\n",
 953                             (dpath ? dpath : spath), strerror(errno));
 954                         r = 1;
 955                         /* Note that we should not set skipdir = 1 here. */
 956                     }
 957                 }
 958                 if (VerboseOpt)
 959                     logstd("%-32s mkdir-ok\n", (dpath ? dpath : spath));
 960                 CountCopiedItems++;
 961             } else {
 962                 /*
 963                  * Directory must be scanable by root for cpdup to
 964                  * work.  We'll fix it later if the directory isn't
 965                  * supposed to be readable ( which is why we fixup
 966                  * st2.st_mode to match what we did ).
 967                  */
 968                 if ((st2.st_mode & 0700) != 0700) {
 969                     hc_chmod(&DstHost, dpath, st2.st_mode | 0700);
 970                     st2.st_mode |= 0700;
 971                 }
 972                 if (VerboseOpt >= 2)
 973                     logstd("%s\n", dpath ? dpath : spath);
 974             }
 975         }
 976
 977         /*
 978          * When copying a directory, stop if the source crosses a mount
 979          * point.
 980          */
 981         if (sdevNo != (dev_t)-1 && stat1->st_dev != sdevNo)
 982             skipdir = 1;
 983         else
 984             sdevNo = stat1->st_dev;
 985
 986         /*
 987          * When copying a directory, stop if the destination crosses
 988          * a mount point.
 989          *
 990          * The target directory will have been created and stat'd
 991          * for st2 if it did not previously exist.   st2Valid is left
 992          * as a flag.  If the stat failed st2 will still only have its
 993          * default initialization.
 994          *
 995          * So we simply assume here that the directory is within the
 996          * current target mount if we had to create it (aka st2Valid is 0)
 997          * and we leave ddevNo alone.
 998          */
 999         if (st2Valid) {
1000             if (ddevNo != (dev_t)-1 && st2.st_dev != ddevNo)
1001                 skipdir = 1;
1002             else
1003                 ddevNo = st2.st_dev;
1004         }
1005
1006         if (!skipdir) {
1007             List *list = malloc(sizeof(List));
1008             Node *node;
1009
1010             if (DirShowOpt)
1011                 logstd("Scanning %s ...\n", spath);
1012             InitList(list);
1013             if (ScanDir(list, &SrcHost, spath, &CountSourceReadBytes, 0) == 0) {
1014                 node = NULL;
1015                 while ((node = IterateList(list, node, 0)) != NULL) {
1016                     char *nspath;
1017                     char *ndpath = NULL;
1018
1019                     nspath = mprintf("%s/%s", spath, node->no_Name);
1020                     if (dpath)
1021                         ndpath = mprintf("%s/%s", dpath, node->no_Name);
1022
1023                     info->spath = nspath;
1024                     info->dpath = ndpath;
1025                     info->sdevNo = sdevNo;
1026                     info->ddevNo = ddevNo;
1027                     if (depth < 0)
1028                         r += DoCopy(info, node->no_Stat, depth);
1029                     else
1030                         r += DoCopy(info, node->no_Stat, depth + 1);
1031                     free(nspath);
1032                     if (ndpath)
1033                         free(ndpath);
1034                     info->spath = NULL;
1035                     info->dpath = NULL;
1036                 }
1037
1038                 /*
1039                  * Remove files/directories from destination that do not appear
1040                  * in the source.
1041                  */
1042                 if (dpath && ScanDir(list, &DstHost, dpath,
1043                                      &CountTargetReadBytes, 3) == 0) {
1044                     node = NULL;
1045                     while ((node = IterateList(list, node, 3)) != NULL) {
1046                         /*
1047                          * If object does not exist in source or .cpignore
1048                          * then recursively remove it.
1049                          */
1050                         char *ndpath;
1051
1052                         ndpath = mprintf("%s/%s", dpath, node->no_Name);
1053                         RemoveRecur(ndpath, ddevNo, node->no_Stat);
1054                         free(ndpath);
1055                     }
1056                 }
1057             }
1058             ResetList(list);
1059             free(list);
1060         }
1061
1062         if (dpath && st2Valid) {
1063             struct timeval tv[2];
1064
1065             if (ForceOpt || !OwnerMatch(stat1, &st2))
1066                 hc_chown(&DstHost, dpath, stat1->st_uid, stat1->st_gid);
1067             if (stat1->st_mode != st2.st_mode)
1068                 hc_chmod(&DstHost, dpath, stat1->st_mode);
1069 #ifdef _ST_FLAGS_PRESENT_
1070             if (!FlagsMatch(stat1, &st2))
1071                 hc_chflags(&DstHost, dpath, stat1->st_flags);
1072 #endif
1073             if (ForceOpt || stat1->st_mtime != st2.st_mtime) {
1074                 bzero(tv, sizeof(tv));
1075                 tv[0].tv_sec = stat1->st_mtime;
1076                 tv[1].tv_sec = stat1->st_mtime;
1077                 hc_utimes(&DstHost, dpath, tv);
1078             }
1079         }
1080     } else if (dpath == NULL) {
1081         /*
1082          * If dpath is NULL, we are just updating the MD5
1083          */
1084 #ifndef NOMD5
1085         if (UseMD5Opt && S_ISREG(stat1->st_mode)) {
1086             mres = md5_check(spath, NULL);
1087
1088             if (VerboseOpt > 1) {
1089                 if (mres < 0)
1090                     logstd("%-32s md5-update\n", (dpath) ? dpath : spath);
1091                 else
1092                     logstd("%-32s md5-ok\n", (dpath) ? dpath : spath);
1093             } else if (!QuietOpt && mres < 0) {
1094                 logstd("%-32s md5-update\n", (dpath) ? dpath : spath);
1095             }
1096         }
1097 #endif
1098     } else if (S_ISREG(stat1->st_mode)) {
1099         char *path;
1100         char *hpath;
1101         int fd1;
1102         int fd2;
1103
1104         if (st2Valid)
1105                 path = mprintf("%s.tmp%d", dpath, (int)getpid());
1106         else
1107                 path = mprintf("%s", dpath);
1108
1109         /*
1110          * Handle check failure message.
1111          */
1112 #ifndef NOMD5
1113         if (mres < 0)
1114             logerr("%-32s md5-CHECK-FAILED\n", (dpath) ? dpath : spath);
1115         else
1116 #endif
1117         if (fres < 0)
1118             logerr("%-32s fsmid-CHECK-FAILED\n", (dpath) ? dpath : spath);
1119
1120         /*
1121          * Not quite ready to do the copy yet.  If UseHLPath is defined,
1122          * see if we can hardlink instead.
1123          *
1124          * If we can hardlink, and the target exists, we have to remove it
1125          * first or the hardlink will fail.  This can occur in a number of
1126          * situations but most typically when the '-f -H' combination is
1127          * used.
1128          */
1129         if (UseHLPath && (hpath = checkHLPath(stat1, spath, dpath)) != NULL) {
1130                 if (st2Valid)
1131                         xremove(&DstHost, dpath);
1132                 if (hc_link(&DstHost, hpath, dpath) == 0) {
1133                         ++CountLinkedItems;
1134                         if (VerboseOpt) {
1135                             logstd("%-32s hardlinked(-H)\n",
1136                                    (dpath ? dpath : spath));
1137                         }
1138                         free(hpath);
1139                         goto skip_copy;
1140                 }
1141                 /*
1142                  * Shucks, we may have hit a filesystem hard linking limit,
1143                  * we have to copy instead.
1144                  */
1145                 free(hpath);
1146         }
1147
1148         if ((fd1 = hc_open(&SrcHost, spath, O_RDONLY, 0)) >= 0) {
1149             if ((fd2 = hc_open(&DstHost, path, O_WRONLY|O_CREAT|O_EXCL, 0600)) < 0) {
1150                 /*
1151                  * There could be a .tmp file from a previously interrupted
1152                  * run, delete and retry.  Fail if we still can't get at it.
1153                  */
1154 #ifdef _ST_FLAGS_PRESENT_
1155                 hc_chflags(&DstHost, path, 0);
1156 #endif
1157                 hc_remove(&DstHost, path);
1158                 fd2 = hc_open(&DstHost, path, O_WRONLY|O_CREAT|O_EXCL|O_TRUNC, 0600);
1159             }
1160             if (fd2 >= 0) {
1161                 const char *op;
1162                 char *iobuf1 = malloc(GETIOSIZE);
1163                 int n;
1164
1165                 /*
1166                  * Matt: What about holes?
1167                  */
1168                 op = "read";
1169                 while ((n = hc_read(&SrcHost, fd1, iobuf1, GETIOSIZE)) > 0) {
1170                     op = "write";
1171                     if (hc_write(&DstHost, fd2, iobuf1, n) != n)
1172                         break;
1173                     op = "read";
1174                 }
1175                 hc_close(&DstHost, fd2);
1176                 if (n == 0) {
1177                     struct timeval tv[2];
1178
1179                     bzero(tv, sizeof(tv));
1180                     tv[0].tv_sec = stat1->st_mtime;
1181                     tv[1].tv_sec = stat1->st_mtime;
1182
1183                     if (DstRootPrivs || ChgrpAllowed(stat1->st_gid))
1184                         hc_chown(&DstHost, path, stat1->st_uid, stat1->st_gid);
1185                     hc_chmod(&DstHost, path, stat1->st_mode);
1186 #ifdef _ST_FLAGS_PRESENT_
1187                     if (stat1->st_flags & (UF_IMMUTABLE|SF_IMMUTABLE))
1188                         hc_utimes(&DstHost, path, tv);
1189 #else
1190                     hc_utimes(&DstHost, path, tv);
1191 #endif
1192                     if (st2Valid && xrename(path, dpath, st2_flags) != 0) {
1193                         logerr("%-32s rename-after-copy failed: %s\n",
1194                             (dpath ? dpath : spath), strerror(errno)
1195                         );
1196                         ++r;
1197                     } else {
1198                         if (VerboseOpt)
1199                             logstd("%-32s copy-ok\n", (dpath ? dpath : spath));
1200 #ifdef _ST_FLAGS_PRESENT_
1201                         if (DstRootPrivs ? stat1->st_flags : stat1->st_flags & UF_SETTABLE)
1202                             hc_chflags(&DstHost, dpath, stat1->st_flags);
1203 #endif
1204                     }
1205 #ifdef _ST_FLAGS_PRESENT_
1206                     if ((stat1->st_flags & (UF_IMMUTABLE|SF_IMMUTABLE)) == 0)
1207                         hc_utimes(&DstHost, dpath, tv);
1208 #endif
1209                     CountSourceReadBytes += size;
1210                     CountWriteBytes += size;
1211                     CountSourceBytes += size;
1212                     CountSourceItems++;
1213                     CountCopiedItems++;
1214                 } else {
1215                     logerr("%-32s %s failed: %s\n",
1216                         (dpath ? dpath : spath), op, strerror(errno)
1217                     );
1218                     hc_remove(&DstHost, path);
1219                     ++r;
1220                 }
1221                 free(iobuf1);
1222             } else {
1223                 logerr("%-32s create (uid %d, euid %d) failed: %s\n",
1224                     (dpath ? dpath : spath), getuid(), geteuid(),
1225                     strerror(errno)
1226                 );
1227                 ++r;
1228             }
1229             hc_close(&SrcHost, fd1);
1230         } else {
1231             logerr("%-32s copy: open failed: %s\n",
1232                 (dpath ? dpath : spath),
1233                 strerror(errno)
1234             );
1235             ++r;
1236         }
1237 skip_copy:
1238         free(path);
1239
1240         if (hln) {
1241             if (!r && hc_stat(&DstHost, dpath, &st2) == 0) {
1242                 hltsetdino(hln, st2.st_ino);
1243             } else {
1244                 hltdelete(hln);
1245                 hln = NULL;
1246             }
1247         }
1248     } else if (S_ISLNK(stat1->st_mode)) {
1249         char *link1 = malloc(GETLINKSIZE);
1250         char *link2 = malloc(GETLINKSIZE);
1251         char *path;
1252         int n1;
1253         int n2;
1254
1255         n1 = hc_readlink(&SrcHost, spath, link1, GETLINKSIZE - 1);
1256         if (st2Valid) {
1257                 path = mprintf("%s.tmp%d", dpath, (int)getpid());
1258                 n2 = hc_readlink(&DstHost, dpath, link2, GETLINKSIZE - 1);
1259         } else {
1260                 path = mprintf("%s", dpath);
1261                 n2 = -1;
1262         }
1263         if (n1 >= 0) {
1264             if (ForceOpt || n1 != n2 || bcmp(link1, link2, n1) != 0) {
1265                 hc_umask(&DstHost, ~stat1->st_mode);
1266                 xremove(&DstHost, path);
1267                 link1[n1] = 0;
1268                 if (hc_symlink(&DstHost, link1, path) < 0) {
1269                       logerr("%-32s symlink (%s->%s) failed: %s\n",
1270                           (dpath ? dpath : spath), link1, path,
1271                           strerror(errno)
1272                       );
1273                       ++r;
1274                 } else {
1275                     if (DstRootPrivs || ChgrpAllowed(stat1->st_gid))
1276                         hc_lchown(&DstHost, path, stat1->st_uid, stat1->st_gid);
1277                     /*
1278                      * there is no lchmod() or lchflags(), we
1279                      * cannot chmod or chflags a softlink.
1280                      */
1281                     if (st2Valid && xrename(path, dpath, st2_flags) != 0) {
1282                         logerr("%-32s rename softlink (%s->%s) failed: %s\n",
1283                             (dpath ? dpath : spath),
1284                             path, dpath, strerror(errno));
1285                     } else if (VerboseOpt) {
1286                         logstd("%-32s softlink-ok\n", (dpath ? dpath : spath));
1287                     }
1288                     hc_umask(&DstHost, 000);
1289                     CountWriteBytes += n1;
1290                     CountCopiedItems++;
1291                 }
1292             } else {
1293                 if (VerboseOpt >= 3)
1294                     logstd("%-32s nochange", (dpath ? dpath : spath));
1295                 if (!OwnerMatch(stat1, &st2)) {
1296                     hc_lchown(&DstHost, dpath, stat1->st_uid, stat1->st_gid);
1297                     if (VerboseOpt >= 3)
1298                         logstd(" (uid/gid differ)");
1299                 }
1300                 if (VerboseOpt >= 3)
1301                     logstd("\n");
1302             }
1303             CountSourceBytes += n1;
1304             CountSourceReadBytes += n1;
1305             if (n2 > 0)
1306                 CountTargetReadBytes += n2;
1307             CountSourceItems++;
1308         } else {
1309             r = 1;
1310             logerr("%-32s softlink-failed\n", (dpath ? dpath : spath));
1311         }
1312         free(link1);
1313         free(link2);
1314         free(path);
1315     } else if ((S_ISCHR(stat1->st_mode) || S_ISBLK(stat1->st_mode)) && DeviceOpt) {
1316         char *path = NULL;
1317
1318         if (ForceOpt ||
1319             st2Valid == 0 ||
1320             stat1->st_mode != st2.st_mode ||
1321             stat1->st_rdev != st2.st_rdev ||
1322             !OwnerMatch(stat1, &st2)
1323         ) {
1324             if (st2Valid) {
1325                 path = mprintf("%s.tmp%d", dpath, (int)getpid());
1326                 xremove(&DstHost, path);
1327             } else {
1328                 path = mprintf("%s", dpath);
1329             }
1330
1331             if (hc_mknod(&DstHost, path, stat1->st_mode, stat1->st_rdev) == 0) {
1332                 hc_chmod(&DstHost, path, stat1->st_mode);
1333                 hc_chown(&DstHost, path, stat1->st_uid, stat1->st_gid);
1334                 if (st2Valid)
1335                         xremove(&DstHost, dpath);
1336                 if (st2Valid && xrename(path, dpath, st2_flags) != 0) {
1337                     logerr("%-32s dev-rename-after-create failed: %s\n",
1338                         (dpath ? dpath : spath),
1339                         strerror(errno)
1340                     );
1341                 } else if (VerboseOpt) {
1342                     logstd("%-32s dev-ok\n", (dpath ? dpath : spath));
1343                 }
1344                 CountCopiedItems++;
1345             } else {
1346                 r = 1;
1347                 logerr("%-32s dev failed: %s\n",
1348                     (dpath ? dpath : spath), strerror(errno)
1349                 );
1350             }
1351         } else {
1352             if (VerboseOpt >= 3)
1353                 logstd("%-32s nochange\n", (dpath ? dpath : spath));
1354         }
1355         if (path)
1356                 free(path);
1357         CountSourceItems++;
1358     }
1359 done:
1360     if (hln) {
1361         if (hln->dino == (ino_t)-1) {
1362             hltdelete(hln);
1363             /*hln = NULL; unneeded */
1364         } else {
1365             hltrels(hln);
1366         }
1367     }
1368     return (r);
1369 }
1370
1371 int
1372 ScanDir(List *list, struct HostConf *host, const char *path,
1373         int64_t *CountReadBytes, int n)
1374 {
1375     DIR *dir;
1376     struct HostConf *cphost;
1377     struct HCDirEntry *den;
1378     struct stat *statptr;
1379
1380     if (n == 0) {
1381         /*
1382          * scan .cpignore file for files/directories to ignore
1383          * (only in the source directory, i.e. if n == 0).
1384          */
1385         if (UseCpFile) {
1386             int fd;
1387             int nread;
1388             int bufused;
1389             char *buf = malloc(GETBUFSIZE);
1390             char *nl, *next;
1391             char *fpath;
1392
1393             if (UseCpFile[0] == '/') {
1394                 fpath = mprintf("%s", UseCpFile);
1395                 cphost = NULL;
1396             } else {
1397                 fpath = mprintf("%s/%s", path, UseCpFile);
1398                 AddList(list, strrchr(fpath, '/') + 1, 1, NULL);
1399                 cphost = host;
1400             }
1401             fd = hc_open(cphost, fpath, O_RDONLY, 0);
1402             if (fd >= 0) {
1403                 bufused = 0;
1404                 while ((nread = hc_read(cphost, fd, buf + bufused,
1405                         GETBUFSIZE - bufused - 1)) > 0) {
1406                     *CountReadBytes += nread;
1407                     bufused += nread;
1408                     buf[bufused] = 0;
1409                     for (next = buf; (nl = strchr(next, '\n')); next = nl+1) {
1410                         *nl = 0;
1411                         AddList(list, next, 1, NULL);
1412                     }
1413                     bufused = strlen(next);
1414                     if (bufused)
1415                         bcopy(next, buf, bufused);
1416                 }
1417                 if (bufused) {
1418                     /* last line has no trailing newline */
1419                     buf[bufused] = 0;
1420                     AddList(list, buf, 1, NULL);
1421                 }
1422                 hc_close(cphost, fd);
1423             }
1424             free(fpath);
1425             free(buf);
1426         }
1427
1428         /*
1429          * Automatically exclude MD5CacheFile that we create on the
1430          * source from the copy to the destination.
1431          *
1432          * Automatically exclude a FSMIDCacheFile on the source that
1433          * would otherwise overwrite the one we maintain on the target.
1434          */
1435         if (UseMD5Opt)
1436             AddList(list, MD5CacheFile, 1, NULL);
1437         if (UseFSMIDOpt)
1438             AddList(list, FSMIDCacheFile, 1, NULL);
1439     }
1440
1441     if ((dir = hc_opendir(host, path)) == NULL)
1442         return (1);
1443     while ((den = hc_readdir(host, dir, &statptr)) != NULL) {
1444         /*
1445          * ignore . and ..
1446          */
1447         if (strcmp(den->d_name, ".") != 0 && strcmp(den->d_name, "..") != 0) {
1448              if (UseCpFile && UseCpFile[0] == '/') {
1449                  if (CheckList(list, path, den->d_name) == 0)
1450                         continue;
1451              }
1452              AddList(list, den->d_name, n, statptr);
1453         }
1454     }
1455     hc_closedir(host, dir);
1456
1457     return (0);
1458 }
1459
1460 /*
1461  * RemoveRecur()
1462  */
1463
1464 static void
1465 RemoveRecur(const char *dpath, dev_t devNo, struct stat *dstat)
1466 {
1467     struct stat st;
1468
1469     if (dstat == NULL) {
1470         if (hc_lstat(&DstHost, dpath, &st) == 0)
1471             dstat = &st;
1472     }
1473     if (dstat != NULL) {
1474         if (devNo == (dev_t)-1)
1475             devNo = dstat->st_dev;
1476         if (dstat->st_dev == devNo) {
1477             if (S_ISDIR(dstat->st_mode)) {
1478                 DIR *dir;
1479
1480                 if ((dir = hc_opendir(&DstHost, dpath)) != NULL) {
1481                     List *list = malloc(sizeof(List));
1482                     Node *node = NULL;
1483                     struct HCDirEntry *den;
1484
1485                     InitList(list);
1486                     while ((den = hc_readdir(&DstHost, dir, &dstat)) != NULL) {
1487                         if (strcmp(den->d_name, ".") == 0)
1488                             continue;
1489                         if (strcmp(den->d_name, "..") == 0)
1490                             continue;
1491                         AddList(list, den->d_name, 3, dstat);
1492                     }
1493                     hc_closedir(&DstHost, dir);
1494                     while ((node = IterateList(list, node, 3)) != NULL) {
1495                         char *ndpath;
1496
1497                         ndpath = mprintf("%s/%s", dpath, node->no_Name);
1498                         RemoveRecur(ndpath, devNo, node->no_Stat);
1499                         free(ndpath);
1500                     }
1501                     ResetList(list);
1502                     free(list);
1503                 }
1504                 if (AskConfirmation && NoRemoveOpt == 0) {
1505                     if (YesNo(dpath)) {
1506                         if (xrmdir(&DstHost, dpath) < 0) {
1507                             logerr("%-32s rmdir failed: %s\n",
1508                                 dpath, strerror(errno)
1509                             );
1510                         }
1511                         CountRemovedItems++;
1512                     }
1513                 } else {
1514                     if (NoRemoveOpt) {
1515                         if (VerboseOpt)
1516                             logstd("%-32s not-removed\n", dpath);
1517                     } else if (xrmdir(&DstHost, dpath) == 0) {
1518                         if (VerboseOpt)
1519                             logstd("%-32s rmdir-ok\n", dpath);
1520                         CountRemovedItems++;
1521                     } else {
1522                         logerr("%-32s rmdir failed: %s\n",
1523                             dpath, strerror(errno)
1524                         );
1525                     }
1526                 }
1527             } else {
1528                 if (AskConfirmation && NoRemoveOpt == 0) {
1529                     if (YesNo(dpath)) {
1530                         if (xremove(&DstHost, dpath) < 0) {
1531                             logerr("%-32s remove failed: %s\n",
1532                                 dpath, strerror(errno)
1533                             );
1534                         }
1535                         CountRemovedItems++;
1536                     }
1537                 } else {
1538                     if (NoRemoveOpt) {
1539                         if (VerboseOpt)
1540                             logstd("%-32s not-removed\n", dpath);
1541                     } else if (xremove(&DstHost, dpath) == 0) {
1542                         if (VerboseOpt)
1543                             logstd("%-32s remove-ok\n", dpath);
1544                         CountRemovedItems++;
1545                     } else {
1546                         logerr("%-32s remove failed: %s\n",
1547                             dpath, strerror(errno)
1548                         );
1549                     }
1550                 }
1551             }
1552         }
1553     }
1554 }
1555
1556 static void
1557 InitList(List *list)
1558 {
1559     bzero(list, sizeof(List));
1560     list->li_Node.no_Next = &list->li_Node;
1561 }
1562
1563 static void
1564 ResetList(List *list)
1565 {
1566     Node *node;
1567
1568     while ((node = list->li_Node.no_Next) != &list->li_Node) {
1569         list->li_Node.no_Next = node->no_Next;
1570         if (node->no_Stat != NULL)
1571             free(node->no_Stat);
1572         free(node);
1573     }
1574     InitList(list);
1575 }
1576
1577 static Node *
1578 IterateList(List *list, Node *node, int n)
1579 {
1580     if (node == NULL)
1581         node = list->li_Node.no_Next;
1582     else
1583         node = node->no_Next;
1584     while (node->no_Value != n && node != &list->li_Node)
1585         node = node->no_Next;
1586     return (node == &list->li_Node ? NULL : node);
1587 }
1588
1589 static int
1590 AddList(List *list, const char *name, int n, struct stat *st)
1591 {
1592     Node *node;
1593     int hv;
1594
1595     /*
1596      * Scan against wildcards.  Only a node value of 1 can be a wildcard
1597      * ( usually scanned from .cpignore )
1598      */
1599     for (node = list->li_Hash[0]; node; node = node->no_HNext) {
1600         if (strcmp(name, node->no_Name) == 0 ||
1601             (n != 1 && node->no_Value == 1 &&
1602             fnmatch(node->no_Name, name, 0) == 0)
1603         ) {
1604             return(node->no_Value);
1605         }
1606     }
1607
1608     /*
1609      * Look for exact match
1610      */
1611
1612     hv = shash(name);
1613     for (node = list->li_Hash[hv]; node; node = node->no_HNext) {
1614         if (strcmp(name, node->no_Name) == 0) {
1615             return(node->no_Value);
1616         }
1617     }
1618     node = malloc(sizeof(Node) + strlen(name) + 1);
1619     if (node == NULL)
1620         fatal("out of memory");
1621
1622     node->no_Next = list->li_Node.no_Next;
1623     list->li_Node.no_Next = node;
1624
1625     node->no_HNext = list->li_Hash[hv];
1626     list->li_Hash[hv] = node;
1627
1628     strcpy(node->no_Name, name);
1629     node->no_Value = n;
1630     node->no_Stat = st;
1631
1632     return(n);
1633 }
1634
1635 /*
1636  * Match against n=1 (cpignore) entries
1637  *
1638  * Returns 0 on match, non-zero if no match
1639  */
1640 static int
1641 CheckList(List *list, const char *path, const char *name)
1642 {
1643     char *fpath = NULL;
1644     Node *node;
1645     int hv;
1646
1647     asprintf(&fpath, "%s/%s", path, name);
1648
1649     /*
1650      * Scan against wildcards.  Only a node value of 1 can be a wildcard
1651      * ( usually scanned from .cpignore )
1652      */
1653     for (node = list->li_Hash[0]; node; node = node->no_HNext) {
1654         if (node->no_Value != 1)
1655                 continue;
1656         if (fnmatch(node->no_Name, fpath, 0) == 0) {
1657                 free(fpath);
1658                 return 0;
1659         }
1660     }
1661
1662     /*
1663      * Look for exact match
1664      */
1665     hv = shash(fpath);
1666     for (node = list->li_Hash[hv]; node; node = node->no_HNext) {
1667         if (node->no_Value != 1)
1668                 continue;
1669         if (strcmp(fpath, node->no_Name) == 0) {
1670                 free(fpath);
1671                 return 0;
1672         }
1673     }
1674
1675     free(fpath);
1676     return 1;
1677 }
1678
1679 static int
1680 shash(const char *s)
1681 {
1682     int hv;
1683
1684     hv = 0xA4FB3255;
1685
1686     while (*s) {
1687         if (*s == '*' || *s == '?' ||
1688             *s == '{' || *s == '}' ||
1689             *s == '[' || *s == ']' ||
1690             *s == '|'
1691         ) {
1692             return(0);
1693         }
1694         hv = (hv << 5) ^ *s ^ (hv >> 23);
1695         ++s;
1696     }
1697     return(((hv >> 16) ^ hv) & HMASK);
1698 }
1699
1700 static int
1701 YesNo(const char *path)
1702 {
1703     int ch, first;
1704
1705     fprintf(stderr, "remove %s (Yes/No) [No]? ", path);
1706     fflush(stderr);
1707
1708     first = ch = getchar();
1709     while (ch != '\n' && ch != EOF)
1710         ch = getchar();
1711     return ((first == 'y' || first == 'Y'));
1712 }
1713
1714 /*
1715  * xrename() - rename with override
1716  *
1717  *      If the rename fails, attempt to override st_flags on the
1718  *      destination and rename again.  If that fails too, try to
1719  *      set the flags back the way they were and give up.
1720  */
1721
1722 static int
1723 xrename(const char *src, const char *dst, u_long flags)
1724 {
1725     int r;
1726
1727     if ((r = hc_rename(&DstHost, src, dst)) < 0) {
1728 #ifdef _ST_FLAGS_PRESENT_
1729         hc_chflags(&DstHost, dst, 0);
1730         if ((r = hc_rename(&DstHost, src, dst)) < 0)
1731                 hc_chflags(&DstHost, dst, flags);
1732 #endif
1733     }
1734     return(r);
1735 }
1736
1737 static int
1738 xlink(const char *src, const char *dst, u_long flags)
1739 {
1740     int r;
1741 #ifdef _ST_FLAGS_PRESENT_
1742     int e;
1743 #endif
1744
1745     if ((r = hc_link(&DstHost, src, dst)) < 0) {
1746 #ifdef _ST_FLAGS_PRESENT_
1747         hc_chflags(&DstHost, src, 0);
1748         r = hc_link(&DstHost, src, dst);
1749         e = errno;
1750         hc_chflags(&DstHost, src, flags);
1751         errno = e;
1752 #endif
1753     }
1754     if (r == 0)
1755             ++CountLinkedItems;
1756     return(r);
1757 }
1758
1759 static int
1760 xremove(struct HostConf *host, const char *path)
1761 {
1762     int res;
1763
1764     res = hc_remove(host, path);
1765 #ifdef _ST_FLAGS_PRESENT_
1766     if (res == -EPERM) {
1767         hc_chflags(host, path, 0);
1768         res = hc_remove(host, path);
1769     }
1770 #endif
1771     return(res);
1772 }
1773
1774 static int
1775 xrmdir(struct HostConf *host, const char *path)
1776 {
1777     int res;
1778
1779     res = hc_rmdir(host, path);
1780 #ifdef _ST_FLAGS_PRESENT_
1781     if (res == -EPERM) {
1782         hc_chflags(host, path, 0);
1783         res = hc_rmdir(host, path);
1784     }
1785 #endif
1786     return(res);
1787 }