1 /* 2 * Copyright (C) 1986-2005 The Free Software Foundation, Inc. 3 * 4 * Portions Copyright (C) 1998-2005 Derek Price, Ximbiot <http://ximbiot.com>, 5 * and others. 6 * 7 * Portions Copyright (C) 1992, Brian Berliner and Jeff Polk 8 * Portions Copyright (C) 1989-1992, Brian Berliner 9 * 10 * You may distribute under the terms of the GNU General Public License as 11 * specified in the README file that comes with the CVS source distribution. 12 * 13 * General recursion handler 14 * 15 */ 16 17 #include "cvs.h" 18 #include "save-cwd.h" 19 #include "fileattr.h" 20 #include "edit.h" 21 22 static int do_dir_proc (Node * p, void *closure); 23 static int do_file_proc (Node * p, void *closure); 24 static void addlist (List ** listp, char *key); 25 static int unroll_files_proc (Node *p, void *closure); 26 static void addfile (List **listp, char *dir, char *file); 27 28 static char *update_dir; 29 static char *repository = NULL; 30 static List *filelist = NULL; /* holds list of files on which to operate */ 31 static List *dirlist = NULL; /* holds list of directories on which to operate */ 32 33 struct recursion_frame { 34 FILEPROC fileproc; 35 FILESDONEPROC filesdoneproc; 36 DIRENTPROC direntproc; 37 DIRLEAVEPROC dirleaveproc; 38 void *callerdat; 39 Dtype flags; 40 int which; 41 int aflag; 42 int locktype; 43 int dosrcs; 44 char *repository; /* Keep track of repository for rtag */ 45 }; 46 47 static int do_recursion (struct recursion_frame *frame); 48 49 /* I am half tempted to shove a struct file_info * into the struct 50 recursion_frame (but then we would need to modify or create a 51 recursion_frame for each file), or shove a struct recursion_frame * 52 into the struct file_info (more tempting, although it isn't completely 53 clear that the struct file_info should contain info about recursion 54 processor internals). So instead use this struct. */ 55 56 struct frame_and_file { 57 struct recursion_frame *frame; 58 struct file_info *finfo; 59 }; 60 61 /* Similarly, we need to pass the entries list to do_dir_proc. */ 62 63 struct frame_and_entries { 64 struct recursion_frame *frame; 65 List *entries; 66 }; 67 68 69 /* Start a recursive command. 70 * 71 * INPUT 72 * 73 * fileproc 74 * Function called with each file as an argument. 75 * 76 * filesdoneproc 77 * Function called after all the files in a directory have been processed, 78 * before subdirectories have been processed. 79 * 80 * direntproc 81 * Function called immediately upon entering a directory, before processing 82 * any files or subdirectories. 83 * 84 * dirleaveproc 85 * Function called upon finishing a directory, immediately before leaving 86 * it and returning control to the function processing the parent 87 * directory. 88 * 89 * callerdat 90 * This void * is passed to the functions above. 91 * 92 * argc, argv 93 * The files on which to operate, interpreted as command line arguments. 94 * In the special case of no arguments, defaults to operating on the 95 * current directory (`.'). 96 * 97 * local 98 * 99 * which 100 * specifies the kind of recursion. There are several cases: 101 * 102 * 1. W_LOCAL is not set but W_REPOS or W_ATTIC is. The current 103 * directory when we are called must be the repository and 104 * recursion proceeds according to what exists in the repository. 105 * 106 * 2a. W_LOCAL is set but W_REPOS and W_ATTIC are not. The 107 * current directory when we are called must be the working 108 * directory. Recursion proceeds according to what exists in the 109 * working directory, never (I think) consulting any part of the 110 * repository which does not correspond to the working directory 111 * ("correspond" == Name_Repository). 112 * 113 * 2b. W_LOCAL is set and so is W_REPOS or W_ATTIC. This is the 114 * weird one. The current directory when we are called must be 115 * the working directory. We recurse through working directories, 116 * but we recurse into a directory if it is exists in the working 117 * directory *or* it exists in the repository. If a directory 118 * does not exist in the working directory, the direntproc must 119 * either tell us to skip it (R_SKIP_ALL), or must create it (I 120 * think those are the only two cases). 121 * 122 * aflag 123 * locktype 124 * update_preload 125 * dosrcs 126 * 127 * repository_in 128 * keeps track of the repository string. This is only for the remote mode, 129 * specifically, r* commands (rtag, rdiff, co, ...) where xgetcwd() was used 130 * to locate the repository. Things would break when xgetcwd() was used 131 * with a symlinked repository because xgetcwd() would return the true path 132 * and in some cases this would cause the path to be printed as other than 133 * the user specified in error messages and in other cases some of CVS's 134 * security assertions would fail. 135 * 136 * GLOBALS 137 * ??? 138 * 139 * OUTPUT 140 * 141 * callerdat can be modified by the FILEPROC, FILESDONEPROC, DIRENTPROC, and 142 * DIRLEAVEPROC. 143 * 144 * RETURNS 145 * A count of errors counted by walking the argument list with 146 * unroll_files_proc() and do_recursion(). 147 * 148 * ERRORS 149 * Fatal errors occur: 150 * 1. when there were no arguments and the current directory 151 * does not contain CVS metadata. 152 * 2. when all but the last path element from an argument from ARGV cannot 153 * be found to be a local directory. 154 */ 155 int 156 start_recursion (FILEPROC fileproc, FILESDONEPROC filesdoneproc, 157 DIRENTPROC direntproc, DIRLEAVEPROC dirleaveproc, 158 void *callerdat, int argc, char **argv, int local, 159 int which, int aflag, int locktype, 160 char *update_preload, int dosrcs, char *repository_in) 161 { 162 int i, err = 0; 163 #ifdef CLIENT_SUPPORT 164 List *args_to_send_when_finished = NULL; 165 #endif 166 List *files_by_dir = NULL; 167 struct recursion_frame frame; 168 169 #ifdef HAVE_PRINTF_PTR 170 TRACE ( TRACE_FLOW, 171 "start_recursion ( fileproc=%p, filesdoneproc=%p,\n" 172 " direntproc=%p, dirleavproc=%p,\n" 173 " callerdat=%p, argc=%d, argv=%p,\n" 174 " local=%d, which=%d, aflag=%d,\n" 175 " locktype=%d, update_preload=%s\n" 176 " dosrcs=%d, repository_in=%s )", 177 (void *) fileproc, (void *) filesdoneproc, 178 (void *) direntproc, (void *) dirleaveproc, 179 (void *) callerdat, argc, (void *) argv, 180 local, which, aflag, locktype, 181 update_preload ? update_preload : "(null)", dosrcs, 182 repository_in ? repository_in : "(null)"); 183 #else 184 TRACE ( TRACE_FLOW, 185 "start_recursion ( fileproc=%lx, filesdoneproc=%lx,\n" 186 " direntproc=%lx, dirleavproc=%lx,\n" 187 " callerdat=%lx, argc=%d, argv=%lx,\n" 188 " local=%d, which=%d, aflag=%d,\n" 189 " locktype=%d, update_preload=%s\n" 190 " dosrcs=%d, repository_in=%s )", 191 (unsigned long) fileproc, (unsigned long) filesdoneproc, 192 (unsigned long) direntproc, (unsigned long) dirleaveproc, 193 (unsigned long) callerdat, argc, (unsigned long) argv, 194 local, which, aflag, locktype, 195 update_preload ? update_preload : "(null)", dosrcs, 196 repository_in ? repository_in : "(null)"); 197 #endif 198 199 frame.fileproc = fileproc; 200 frame.filesdoneproc = filesdoneproc; 201 frame.direntproc = direntproc; 202 frame.dirleaveproc = dirleaveproc; 203 frame.callerdat = callerdat; 204 frame.flags = local ? R_SKIP_DIRS : R_PROCESS; 205 frame.which = which; 206 frame.aflag = aflag; 207 frame.locktype = locktype; 208 frame.dosrcs = dosrcs; 209 210 /* If our repository_in has a trailing "/.", remove it before storing it 211 * for do_recursion(). 212 * 213 * FIXME: This is somewhat of a hack in the sense that many of our callers 214 * painstakingly compute and add the trailing '.' we now remove. 215 */ 216 while (repository_in && strlen (repository_in) >= 2 217 && repository_in[strlen (repository_in) - 2] == '/' 218 && repository_in[strlen (repository_in) - 1] == '.') 219 { 220 /* Beware the case where the string is exactly "/." or "//.". 221 * Paths with a leading "//" are special on some early UNIXes. 222 */ 223 if (strlen (repository_in) == 2 || strlen (repository_in) == 3) 224 repository_in[strlen (repository_in) - 1] = '\0'; 225 else 226 repository_in[strlen (repository_in) - 2] = '\0'; 227 } 228 frame.repository = repository_in; 229 230 expand_wild (argc, argv, &argc, &argv); 231 232 if (update_preload == NULL) 233 update_dir = xstrdup (""); 234 else 235 update_dir = xstrdup (update_preload); 236 237 /* clean up from any previous calls to start_recursion */ 238 if (repository) 239 { 240 free (repository); 241 repository = NULL; 242 } 243 if (filelist) 244 dellist (&filelist); /* FIXME-krp: no longer correct. */ 245 if (dirlist) 246 dellist (&dirlist); 247 248 #ifdef SERVER_SUPPORT 249 if (server_active) 250 { 251 for (i = 0; i < argc; ++i) 252 server_pathname_check (argv[i]); 253 } 254 #endif 255 256 if (argc == 0) 257 { 258 int just_subdirs = (which & W_LOCAL) && !isdir (CVSADM); 259 260 #ifdef CLIENT_SUPPORT 261 if (!just_subdirs 262 && CVSroot_cmdline == NULL 263 && current_parsed_root->isremote) 264 { 265 cvsroot_t *root = Name_Root (NULL, update_dir); 266 if (root) 267 { 268 if (strcmp (root->original, original_parsed_root->original)) 269 /* We're skipping this directory because it is for 270 * a different root. Therefore, we just want to 271 * do the subdirectories only. Processing files would 272 * cause a working directory from one repository to be 273 * processed against a different repository, which could 274 * cause all kinds of spurious conflicts and such. 275 * 276 * Question: what about the case of "cvs update foo" 277 * where we process foo/bar and not foo itself? That 278 * seems to be handled somewhere (else) but why should 279 * it be a separate case? Needs investigation... */ 280 just_subdirs = 1; 281 } 282 } 283 #endif 284 285 /* 286 * There were no arguments, so we'll probably just recurse. The 287 * exception to the rule is when we are called from a directory 288 * without any CVS administration files. That has always meant to 289 * process each of the sub-directories, so we pretend like we were 290 * called with the list of sub-dirs of the current dir as args 291 */ 292 if (just_subdirs) 293 { 294 dirlist = Find_Directories (NULL, W_LOCAL, NULL); 295 /* If there are no sub-directories, there is a certain logic in 296 favor of doing nothing, but in fact probably the user is just 297 confused about what directory they are in, or whether they 298 cvs add'd a new directory. In the case of at least one 299 sub-directory, at least when we recurse into them we 300 notice (hopefully) whether they are under CVS control. */ 301 if (list_isempty (dirlist)) 302 { 303 if (update_dir[0] == '\0') 304 error (0, 0, "in directory .:"); 305 else 306 error (0, 0, "in directory %s:", update_dir); 307 error (1, 0, 308 "there is no version here; run '%s checkout' first", 309 program_name); 310 } 311 #ifdef CLIENT_SUPPORT 312 else if (current_parsed_root->isremote && server_started) 313 { 314 /* In the the case "cvs update foo bar baz", a call to 315 send_file_names in update.c will have sent the 316 appropriate "Argument" commands to the server. In 317 this case, that won't have happened, so we need to 318 do it here. While this example uses "update", this 319 generalizes to other commands. */ 320 321 /* This is the same call to Find_Directories as above. 322 FIXME: perhaps it would be better to write a 323 function that duplicates a list. */ 324 args_to_send_when_finished = Find_Directories (NULL, 325 W_LOCAL, 326 NULL); 327 } 328 #endif 329 } 330 else 331 addlist (&dirlist, "."); 332 333 goto do_the_work; 334 } 335 336 337 /* 338 * There were arguments, so we have to handle them by hand. To do 339 * that, we set up the filelist and dirlist with the arguments and 340 * call do_recursion. do_recursion recognizes the fact that the 341 * lists are non-null when it starts and doesn't update them. 342 * 343 * explicitly named directories are stored in dirlist. 344 * explicitly named files are stored in filelist. 345 * other possibility is named entities whicha are not currently in 346 * the working directory. 347 */ 348 349 for (i = 0; i < argc; i++) 350 { 351 /* if this argument is a directory, then add it to the list of 352 directories. */ 353 354 if (!wrap_name_has (argv[i], WRAP_TOCVS) && isdir (argv[i])) 355 { 356 strip_trailing_slashes (argv[i]); 357 addlist (&dirlist, argv[i]); 358 } 359 else 360 { 361 /* otherwise, split argument into directory and component names. */ 362 char *dir; 363 char *comp; 364 char *file_to_try; 365 366 /* Now break out argv[i] into directory part (DIR) and file part 367 * (COMP). DIR and COMP will each point to a newly malloc'd 368 * string. 369 */ 370 dir = xstrdup (argv[i]); 371 /* It's okay to cast out last_component's const below since we know 372 * we just allocated dir here and have control of it. 373 */ 374 comp = (char *)last_component (dir); 375 if (comp == dir) 376 { 377 /* no dir component. What we have is an implied "./" */ 378 dir = xstrdup("."); 379 } 380 else 381 { 382 comp[-1] = '\0'; 383 comp = xstrdup (comp); 384 } 385 386 /* if this argument exists as a file in the current 387 working directory tree, then add it to the files list. */ 388 389 if (!(which & W_LOCAL)) 390 { 391 /* If doing rtag, we've done a chdir to the repository. */ 392 file_to_try = Xasprintf ("%s%s", argv[i], RCSEXT); 393 } 394 else 395 file_to_try = xstrdup (argv[i]); 396 397 if (isfile (file_to_try)) 398 addfile (&files_by_dir, dir, comp); 399 else if (isdir (dir)) 400 { 401 if ((which & W_LOCAL) && isdir (CVSADM) && 402 !current_parsed_root->isremote) 403 { 404 /* otherwise, look for it in the repository. */ 405 char *tmp_update_dir; 406 char *repos; 407 char *reposfile; 408 409 tmp_update_dir = xmalloc (strlen (update_dir) 410 + strlen (dir) 411 + 5); 412 strcpy (tmp_update_dir, update_dir); 413 414 if (*tmp_update_dir != '\0') 415 strcat (tmp_update_dir, "/"); 416 417 strcat (tmp_update_dir, dir); 418 419 /* look for it in the repository. */ 420 repos = Name_Repository (dir, tmp_update_dir); 421 reposfile = Xasprintf ("%s/%s", repos, comp); 422 free (repos); 423 424 if (!wrap_name_has (comp, WRAP_TOCVS) && isdir (reposfile)) 425 addlist (&dirlist, argv[i]); 426 else 427 addfile (&files_by_dir, dir, comp); 428 429 free (tmp_update_dir); 430 free (reposfile); 431 } 432 else 433 addfile (&files_by_dir, dir, comp); 434 } 435 else 436 error (1, 0, "no such directory `%s'", dir); 437 438 free (file_to_try); 439 free (dir); 440 free (comp); 441 } 442 } 443 444 /* At this point we have looped over all named arguments and built 445 a coupla lists. Now we unroll the lists, setting up and 446 calling do_recursion. */ 447 448 err += walklist (files_by_dir, unroll_files_proc, (void *) &frame); 449 dellist(&files_by_dir); 450 451 /* then do_recursion on the dirlist. */ 452 if (dirlist != NULL) 453 { 454 do_the_work: 455 err += do_recursion (&frame); 456 } 457 458 /* Free the data which expand_wild allocated. */ 459 free_names (&argc, argv); 460 461 free (update_dir); 462 update_dir = NULL; 463 464 #ifdef CLIENT_SUPPORT 465 if (args_to_send_when_finished != NULL) 466 { 467 /* FIXME (njc): in the multiroot case, we don't want to send 468 argument commands for those top-level directories which do 469 not contain any subdirectories which have files checked out 470 from current_parsed_root. If we do, and two repositories 471 have a module with the same name, nasty things could happen. 472 473 This is hard. Perhaps we should send the Argument commands 474 later in this procedure, after we've had a chance to notice 475 which directores we're using (after do_recursion has been 476 called once). This means a _lot_ of rewriting, however. 477 478 What we need to do for that to happen is descend the tree 479 and construct a list of directories which are checked out 480 from current_cvsroot. Now, we eliminate from the list all 481 of those directories which are immediate subdirectories of 482 another directory in the list. To say that the opposite 483 way, we keep the directories which are not immediate 484 subdirectories of any other in the list. Here's a picture: 485 486 a 487 / \ 488 B C 489 / \ 490 D e 491 / \ 492 F G 493 / \ 494 H I 495 496 The node in capitals are those directories which are 497 checked out from current_cvsroot. We want the list to 498 contain B, C, F, and G. D, H, and I are not included, 499 because their parents are also checked out from 500 current_cvsroot. 501 502 The algorithm should be: 503 504 1) construct a tree of all directory names where each 505 element contains a directory name and a flag which notes if 506 that directory is checked out from current_cvsroot 507 508 a0 509 / \ 510 B1 C1 511 / \ 512 D1 e0 513 / \ 514 F1 G1 515 / \ 516 H1 I1 517 518 2) Recursively descend the tree. For each node, recurse 519 before processing the node. If the flag is zero, do 520 nothing. If the flag is 1, check the node's parent. If 521 the parent's flag is one, change the current entry's flag 522 to zero. 523 524 a0 525 / \ 526 B1 C1 527 / \ 528 D0 e0 529 / \ 530 F1 G1 531 / \ 532 H0 I0 533 534 3) Walk the tree and spit out "Argument" commands to tell 535 the server which directories to munge. 536 537 Yuck. It's not clear this is worth spending time on, since 538 we might want to disable cvs commands entirely from 539 directories that do not have CVSADM files... 540 541 Anyways, the solution as it stands has modified server.c 542 (dirswitch) to create admin files [via server.c 543 (create_adm_p)] in all path elements for a client's 544 "Directory xxx" command, which forces the server to descend 545 and serve the files there. client.c (send_file_names) has 546 also been modified to send only those arguments which are 547 appropriate to current_parsed_root. 548 549 */ 550 551 /* Construct a fake argc/argv pair. */ 552 553 int our_argc = 0, i; 554 char **our_argv = NULL; 555 556 if (! list_isempty (args_to_send_when_finished)) 557 { 558 Node *head, *p; 559 560 head = args_to_send_when_finished->list; 561 562 /* count the number of nodes */ 563 i = 0; 564 for (p = head->next; p != head; p = p->next) 565 i++; 566 our_argc = i; 567 568 /* create the argument vector */ 569 our_argv = xmalloc (sizeof (char *) * our_argc); 570 571 /* populate it */ 572 i = 0; 573 for (p = head->next; p != head; p = p->next) 574 our_argv[i++] = xstrdup (p->key); 575 } 576 577 /* We don't want to expand widcards, since we've just created 578 a list of directories directly from the filesystem. */ 579 send_file_names (our_argc, our_argv, 0); 580 581 /* Free our argc/argv. */ 582 if (our_argv != NULL) 583 { 584 for (i = 0; i < our_argc; i++) 585 free (our_argv[i]); 586 free (our_argv); 587 } 588 589 dellist (&args_to_send_when_finished); 590 } 591 #endif 592 593 return err; 594 } 595 596 597 598 /* 599 * Implement the recursive policies on the local directory. This may be 600 * called directly, or may be called by start_recursion. 601 */ 602 static int 603 do_recursion (struct recursion_frame *frame) 604 { 605 int err = 0; 606 int dodoneproc = 1; 607 char *srepository = NULL; 608 List *entries = NULL; 609 int locktype; 610 bool process_this_directory = true; 611 612 #ifdef HAVE_PRINT_PTR 613 TRACE (TRACE_FLOW, "do_recursion ( frame=%p )", (void *) frame); 614 #else 615 TRACE (TRACE_FLOW, "do_recursion ( frame=%lx )", (unsigned long) frame); 616 #endif 617 618 /* do nothing if told */ 619 if (frame->flags == R_SKIP_ALL) 620 return 0; 621 622 locktype = noexec ? CVS_LOCK_NONE : frame->locktype; 623 624 /* The fact that locks are not active here is what makes us fail to have 625 the 626 627 If someone commits some changes in one cvs command, 628 then an update by someone else will either get all the 629 changes, or none of them. 630 631 property (see node Concurrency in cvs.texinfo). 632 633 The most straightforward fix would just to readlock the whole 634 tree before starting an update, but that means that if a commit 635 gets blocked on a big update, it might need to wait a *long* 636 time. 637 638 A more adequate fix would be a two-pass design for update, 639 checkout, etc. The first pass would go through the repository, 640 with the whole tree readlocked, noting what versions of each 641 file we want to get. The second pass would release all locks 642 (except perhaps short-term locks on one file at a 643 time--although I think RCS already deals with this) and 644 actually get the files, specifying the particular versions it wants. 645 646 This could be sped up by separating out the data needed for the 647 first pass into a separate file(s)--for example a file 648 attribute for each file whose value contains the head revision 649 for each branch. The structure should be designed so that 650 commit can relatively quickly update the information for a 651 single file or a handful of files (file attributes, as 652 implemented in Jan 96, are probably acceptable; improvements 653 would be possible such as branch attributes which are in 654 separate files for each branch). */ 655 656 #if defined(SERVER_SUPPORT) && defined(SERVER_FLOWCONTROL) 657 /* 658 * Now would be a good time to check to see if we need to stop 659 * generating data, to give the buffers a chance to drain to the 660 * remote client. We should not have locks active at this point, 661 * but if there are writelocks around, we cannot pause here. */ 662 if (server_active && locktype != CVS_LOCK_WRITE) 663 server_pause_check(); 664 #endif 665 666 /* Check the value in CVSADM_ROOT and see if it's in the list. If 667 not, add it to our lists of CVS/Root directories and do not 668 process the files in this directory. Otherwise, continue as 669 usual. THIS_ROOT might be NULL if we're doing an initial 670 checkout -- check before using it. The default should be that 671 we process a directory's contents and only skip those contents 672 if a CVS/Root file exists. 673 674 If we're running the server, we want to process all 675 directories, since we're guaranteed to have only one CVSROOT -- 676 our own. */ 677 678 /* If -d was specified, it should override CVS/Root. 679 680 In the single-repository case, it is long-standing CVS behavior 681 and makes sense - the user might want another access method, 682 another server (which mounts the same repository), &c. 683 684 In the multiple-repository case, -d overrides all CVS/Root 685 files. That is the only plausible generalization I can 686 think of. */ 687 if (CVSroot_cmdline == NULL && !server_active) 688 { 689 cvsroot_t *this_root = Name_Root (NULL, update_dir); 690 if (this_root != NULL) 691 { 692 if (findnode (root_directories, this_root->original)) 693 { 694 process_this_directory = 695 !strcmp (original_parsed_root->original, 696 this_root->original); 697 } 698 else 699 { 700 /* Add it to our list. */ 701 702 Node *n = getnode (); 703 n->type = NT_UNKNOWN; 704 n->key = xstrdup (this_root->original); 705 n->data = this_root; 706 707 if (addnode (root_directories, n)) 708 error (1, 0, "cannot add new CVSROOT %s", 709 this_root->original); 710 711 process_this_directory = false; 712 } 713 } 714 } 715 716 /* 717 * Fill in repository with the current repository 718 */ 719 if (frame->which & W_LOCAL) 720 { 721 if (isdir (CVSADM)) 722 { 723 repository = Name_Repository (NULL, update_dir); 724 srepository = repository; /* remember what to free */ 725 } 726 else 727 repository = NULL; 728 } 729 else 730 { 731 repository = frame->repository; 732 assert (repository != NULL); 733 assert (strstr (repository, "/./") == NULL); 734 } 735 736 fileattr_startdir (repository); 737 738 /* 739 * The filesdoneproc needs to be called for each directory where files 740 * processed, or each directory that is processed by a call where no 741 * directories were passed in. In fact, the only time we don't want to 742 * call back the filesdoneproc is when we are processing directories that 743 * were passed in on the command line (or in the special case of `.' when 744 * we were called with no args 745 */ 746 if (dirlist != NULL && filelist == NULL) 747 dodoneproc = 0; 748 749 /* 750 * If filelist or dirlist is already set, we don't look again. Otherwise, 751 * find the files and directories 752 */ 753 if (filelist == NULL && dirlist == NULL) 754 { 755 /* both lists were NULL, so start from scratch */ 756 if (frame->fileproc != NULL && frame->flags != R_SKIP_FILES) 757 { 758 int lwhich = frame->which; 759 760 /* be sure to look in the attic if we have sticky tags/date */ 761 if ((lwhich & W_ATTIC) == 0) 762 if (isreadable (CVSADM_TAG)) 763 lwhich |= W_ATTIC; 764 765 /* In the !(which & W_LOCAL) case, we filled in repository 766 earlier in the function. In the (which & W_LOCAL) case, 767 the Find_Names function is going to look through the 768 Entries file. If we do not have a repository, that 769 does not make sense, so we insist upon having a 770 repository at this point. Name_Repository will give a 771 reasonable error message. */ 772 if (repository == NULL) 773 { 774 Name_Repository (NULL, update_dir); 775 assert (!"Not reached. Please report this problem to <" 776 PACKAGE_BUGREPORT ">"); 777 } 778 /* find the files and fill in entries if appropriate */ 779 if (process_this_directory) 780 { 781 filelist = Find_Names (repository, lwhich, frame->aflag, 782 &entries); 783 if (filelist == NULL) 784 { 785 error (0, 0, "skipping directory %s", update_dir); 786 /* Note that Find_Directories and the filesdoneproc 787 in particular would do bad things ("? foo.c" in 788 the case of some filesdoneproc's). */ 789 goto skip_directory; 790 } 791 } 792 } 793 794 /* find sub-directories if we will recurse */ 795 if (frame->flags != R_SKIP_DIRS) 796 dirlist = Find_Directories ( 797 process_this_directory ? repository : NULL, 798 frame->which, entries); 799 } 800 else 801 { 802 /* something was passed on the command line */ 803 if (filelist != NULL && frame->fileproc != NULL) 804 { 805 /* we will process files, so pre-parse entries */ 806 if (frame->which & W_LOCAL) 807 entries = Entries_Open (frame->aflag, NULL); 808 } 809 } 810 811 /* process the files (if any) */ 812 if (process_this_directory && filelist != NULL && frame->fileproc) 813 { 814 struct file_info finfo_struct; 815 struct frame_and_file frfile; 816 817 /* Lock the repository, if necessary. */ 818 if (repository) 819 { 820 if (locktype == CVS_LOCK_READ) 821 { 822 if (Reader_Lock (repository) != 0) 823 error (1, 0, "read lock failed - giving up"); 824 } 825 else if (locktype == CVS_LOCK_WRITE) 826 lock_dir_for_write (repository); 827 } 828 829 #ifdef CLIENT_SUPPORT 830 /* For the server, we handle notifications in a completely different 831 place (server_notify). For local, we can't do them here--we don't 832 have writelocks in place, and there is no way to get writelocks 833 here. */ 834 if (current_parsed_root->isremote) 835 notify_check (repository, update_dir); 836 #endif /* CLIENT_SUPPORT */ 837 838 finfo_struct.repository = repository; 839 finfo_struct.update_dir = update_dir; 840 finfo_struct.entries = entries; 841 /* do_file_proc will fill in finfo_struct.file. */ 842 843 frfile.finfo = &finfo_struct; 844 frfile.frame = frame; 845 846 /* process the files */ 847 err += walklist (filelist, do_file_proc, &frfile); 848 849 /* unlock it */ 850 if (/* We only lock the repository above when repository is set */ 851 repository 852 /* and when asked for a read or write lock. */ 853 && locktype != CVS_LOCK_NONE) 854 Simple_Lock_Cleanup (); 855 856 /* clean up */ 857 dellist (&filelist); 858 } 859 860 /* call-back files done proc (if any) */ 861 if (process_this_directory && dodoneproc && frame->filesdoneproc != NULL) 862 err = frame->filesdoneproc (frame->callerdat, err, repository, 863 update_dir[0] ? update_dir : ".", 864 entries); 865 866 skip_directory: 867 fileattr_write (); 868 fileattr_free (); 869 870 /* process the directories (if necessary) */ 871 if (dirlist != NULL) 872 { 873 struct frame_and_entries frent; 874 875 frent.frame = frame; 876 frent.entries = entries; 877 err += walklist (dirlist, do_dir_proc, &frent); 878 } 879 #if 0 880 else if (frame->dirleaveproc != NULL) 881 err += frame->dirleaveproc (frame->callerdat, ".", err, "."); 882 #endif 883 dellist (&dirlist); 884 885 if (entries) 886 { 887 Entries_Close (entries); 888 entries = NULL; 889 } 890 891 /* free the saved copy of the pointer if necessary */ 892 if (srepository) 893 free (srepository); 894 repository = NULL; 895 896 #ifdef HAVE_PRINT_PTR 897 TRACE (TRACE_FLOW, "Leaving do_recursion (frame=%p)", (void *)frame); 898 #else 899 TRACE (TRACE_FLOW, "Leaving do_recursion (frame=%lx)", 900 (unsigned long)frame); 901 #endif 902 903 return err; 904 } 905 906 907 908 /* 909 * Process each of the files in the list with the callback proc 910 * 911 * NOTES 912 * Fills in FINFO->fullname, and sometimes FINFO->rcs before 913 * calling the callback proc (FRFILE->frame->fileproc), but frees them 914 * before return. 915 * 916 * OUTPUTS 917 * Fills in FINFO->file. 918 * 919 * RETURNS 920 * 0 if we were supposed to find an RCS file but couldn't. 921 * Otherwise, returns the error code returned by the callback function. 922 */ 923 static int 924 do_file_proc (Node *p, void *closure) 925 { 926 struct frame_and_file *frfile = closure; 927 struct file_info *finfo = frfile->finfo; 928 int ret; 929 char *tmp; 930 931 finfo->file = p->key; 932 if (finfo->update_dir[0] != '\0') 933 tmp = Xasprintf ("%s/%s", finfo->update_dir, finfo->file); 934 else 935 tmp = xstrdup (finfo->file); 936 937 if (frfile->frame->dosrcs && repository) 938 { 939 finfo->rcs = RCS_parse (finfo->file, repository); 940 941 /* OK, without W_LOCAL the error handling becomes relatively 942 simple. The file names came from readdir() on the 943 repository and so we know any ENOENT is an error 944 (e.g. symlink pointing to nothing). Now, the logic could 945 be simpler - since we got the name from readdir, we could 946 just be calling RCS_parsercsfile. */ 947 if (finfo->rcs == NULL 948 && !(frfile->frame->which & W_LOCAL)) 949 { 950 error (0, 0, "could not read RCS file for %s", tmp); 951 free (tmp); 952 cvs_flushout (); 953 return 0; 954 } 955 } 956 else 957 finfo->rcs = NULL; 958 finfo->fullname = tmp; 959 ret = frfile->frame->fileproc (frfile->frame->callerdat, finfo); 960 961 freercsnode (&finfo->rcs); 962 free (tmp); 963 964 /* Allow the user to monitor progress with tail -f. Doing this once 965 per file should be no big deal, but we don't want the performance 966 hit of flushing on every line like previous versions of CVS. */ 967 cvs_flushout (); 968 969 return ret; 970 } 971 972 973 974 /* 975 * Process each of the directories in the list (recursing as we go) 976 */ 977 static int 978 do_dir_proc (Node *p, void *closure) 979 { 980 struct frame_and_entries *frent = (struct frame_and_entries *) closure; 981 struct recursion_frame *frame = frent->frame; 982 struct recursion_frame xframe; 983 char *dir = p->key; 984 char *newrepos; 985 List *sdirlist; 986 char *srepository; 987 Dtype dir_return = R_PROCESS; 988 int stripped_dot = 0; 989 int err = 0; 990 struct saved_cwd cwd; 991 char *saved_update_dir; 992 bool process_this_directory = true; 993 994 if (fncmp (dir, CVSADM) == 0) 995 { 996 /* This seems to most often happen when users (beginning users, 997 generally), try "cvs ci *" or something similar. On that 998 theory, it is possible that we should just silently skip the 999 CVSADM directories, but on the other hand, using a wildcard 1000 like this isn't necessarily a practice to encourage (it operates 1001 only on files which exist in the working directory, unlike 1002 regular CVS recursion). */ 1003 1004 /* FIXME-reentrancy: printed_cvs_msg should be in a "command 1005 struct" or some such, so that it gets cleared for each new 1006 command (this is possible using the remote protocol and a 1007 custom-written client). The struct recursion_frame is not 1008 far back enough though, some commands (commit at least) 1009 will call start_recursion several times. An alternate solution 1010 would be to take this whole check and move it to a new function 1011 validate_arguments or some such that all the commands call 1012 and which snips the offending directory from the argc,argv 1013 vector. */ 1014 static int printed_cvs_msg = 0; 1015 if (!printed_cvs_msg) 1016 { 1017 error (0, 0, "warning: directory %s specified in argument", 1018 dir); 1019 error (0, 0, "\ 1020 but CVS uses %s for its own purposes; skipping %s directory", 1021 CVSADM, dir); 1022 printed_cvs_msg = 1; 1023 } 1024 return 0; 1025 } 1026 1027 saved_update_dir = update_dir; 1028 update_dir = xmalloc (strlen (saved_update_dir) 1029 + strlen (dir) 1030 + 5); 1031 strcpy (update_dir, saved_update_dir); 1032 1033 /* set up update_dir - skip dots if not at start */ 1034 if (strcmp (dir, ".") != 0) 1035 { 1036 if (update_dir[0] != '\0') 1037 { 1038 (void) strcat (update_dir, "/"); 1039 (void) strcat (update_dir, dir); 1040 } 1041 else 1042 (void) strcpy (update_dir, dir); 1043 1044 /* 1045 * Here we need a plausible repository name for the sub-directory. We 1046 * create one by concatenating the new directory name onto the 1047 * previous repository name. The only case where the name should be 1048 * used is in the case where we are creating a new sub-directory for 1049 * update -d and in that case the generated name will be correct. 1050 */ 1051 if (repository == NULL) 1052 newrepos = xstrdup (""); 1053 else 1054 newrepos = Xasprintf ("%s/%s", repository, dir); 1055 } 1056 else 1057 { 1058 if (update_dir[0] == '\0') 1059 (void) strcpy (update_dir, dir); 1060 1061 if (repository == NULL) 1062 newrepos = xstrdup (""); 1063 else 1064 newrepos = xstrdup (repository); 1065 } 1066 1067 /* Check to see that the CVSADM directory, if it exists, seems to be 1068 well-formed. It can be missing files if the user hit ^C in the 1069 middle of a previous run. We want to (a) make this a nonfatal 1070 error, and (b) make sure we print which directory has the 1071 problem. 1072 1073 Do this before the direntproc, so that (1) the direntproc 1074 doesn't have to guess/deduce whether we will skip the directory 1075 (e.g. send_dirent_proc and whether to send the directory), and 1076 (2) so that the warm fuzzy doesn't get printed if we skip the 1077 directory. */ 1078 if (frame->which & W_LOCAL) 1079 { 1080 char *cvsadmdir; 1081 1082 cvsadmdir = xmalloc (strlen (dir) 1083 + sizeof (CVSADM_REP) 1084 + sizeof (CVSADM_ENT) 1085 + 80); 1086 1087 strcpy (cvsadmdir, dir); 1088 strcat (cvsadmdir, "/"); 1089 strcat (cvsadmdir, CVSADM); 1090 if (isdir (cvsadmdir)) 1091 { 1092 strcpy (cvsadmdir, dir); 1093 strcat (cvsadmdir, "/"); 1094 strcat (cvsadmdir, CVSADM_REP); 1095 if (!isfile (cvsadmdir)) 1096 { 1097 /* Some commands like update may have printed "? foo" but 1098 if we were planning to recurse, and don't on account of 1099 CVS/Repository, we want to say why. */ 1100 error (0, 0, "ignoring %s (%s missing)", update_dir, 1101 CVSADM_REP); 1102 dir_return = R_SKIP_ALL; 1103 } 1104 1105 /* Likewise for CVS/Entries. */ 1106 if (dir_return != R_SKIP_ALL) 1107 { 1108 strcpy (cvsadmdir, dir); 1109 strcat (cvsadmdir, "/"); 1110 strcat (cvsadmdir, CVSADM_ENT); 1111 if (!isfile (cvsadmdir)) 1112 { 1113 /* Some commands like update may have printed "? foo" but 1114 if we were planning to recurse, and don't on account of 1115 CVS/Repository, we want to say why. */ 1116 error (0, 0, "ignoring %s (%s missing)", update_dir, 1117 CVSADM_ENT); 1118 dir_return = R_SKIP_ALL; 1119 } 1120 } 1121 } 1122 free (cvsadmdir); 1123 } 1124 1125 /* Only process this directory if the root matches. This nearly 1126 duplicates code in do_recursion. */ 1127 1128 /* If -d was specified, it should override CVS/Root. 1129 1130 In the single-repository case, it is long-standing CVS behavior 1131 and makes sense - the user might want another access method, 1132 another server (which mounts the same repository), &c. 1133 1134 In the multiple-repository case, -d overrides all CVS/Root 1135 files. That is the only plausible generalization I can 1136 think of. */ 1137 if (CVSroot_cmdline == NULL && !server_active) 1138 { 1139 cvsroot_t *this_root = Name_Root (dir, update_dir); 1140 if (this_root != NULL) 1141 { 1142 if (findnode (root_directories, this_root->original)) 1143 { 1144 process_this_directory = 1145 !strcmp (original_parsed_root->original, 1146 this_root->original); 1147 } 1148 else 1149 { 1150 /* Add it to our list. */ 1151 1152 Node *n = getnode (); 1153 n->type = NT_UNKNOWN; 1154 n->key = xstrdup (this_root->original); 1155 n->data = this_root; 1156 1157 if (addnode (root_directories, n)) 1158 error (1, 0, "cannot add new CVSROOT %s", 1159 this_root->original); 1160 1161 process_this_directory = false; 1162 } 1163 } 1164 } 1165 1166 /* call-back dir entry proc (if any) */ 1167 if (dir_return == R_SKIP_ALL) 1168 ; 1169 else if (frame->direntproc != NULL) 1170 { 1171 /* If we're doing the actual processing, call direntproc. 1172 Otherwise, assume that we need to process this directory 1173 and recurse. FIXME. */ 1174 1175 if (process_this_directory) 1176 dir_return = frame->direntproc (frame->callerdat, dir, newrepos, 1177 update_dir, frent->entries); 1178 else 1179 dir_return = R_PROCESS; 1180 } 1181 else 1182 { 1183 /* Generic behavior. I don't see a reason to make the caller specify 1184 a direntproc just to get this. */ 1185 if ((frame->which & W_LOCAL) && !isdir (dir)) 1186 dir_return = R_SKIP_ALL; 1187 } 1188 1189 free (newrepos); 1190 1191 /* only process the dir if the return code was 0 */ 1192 if (dir_return != R_SKIP_ALL) 1193 { 1194 /* save our current directory and static vars */ 1195 if (save_cwd (&cwd)) 1196 error (1, errno, "Failed to save current directory."); 1197 sdirlist = dirlist; 1198 srepository = repository; 1199 dirlist = NULL; 1200 1201 /* cd to the sub-directory */ 1202 if (CVS_CHDIR (dir) < 0) 1203 error (1, errno, "could not chdir to %s", dir); 1204 1205 /* honor the global SKIP_DIRS (a.k.a. local) */ 1206 if (frame->flags == R_SKIP_DIRS) 1207 dir_return = R_SKIP_DIRS; 1208 1209 /* remember if the `.' will be stripped for subsequent dirs */ 1210 if (strcmp (update_dir, ".") == 0) 1211 { 1212 update_dir[0] = '\0'; 1213 stripped_dot = 1; 1214 } 1215 1216 /* make the recursive call */ 1217 xframe = *frame; 1218 xframe.flags = dir_return; 1219 /* Keep track of repository, really just for r* commands (rtag, rdiff, 1220 * co, ...) to tag_check_valid, since all the other commands use 1221 * CVS/Repository to figure it out per directory. 1222 */ 1223 if (repository) 1224 { 1225 if (strcmp (dir, ".") == 0) 1226 xframe.repository = xstrdup (repository); 1227 else 1228 xframe.repository = Xasprintf ("%s/%s", repository, dir); 1229 } 1230 else 1231 xframe.repository = NULL; 1232 err += do_recursion (&xframe); 1233 if (xframe.repository) 1234 { 1235 free (xframe.repository); 1236 xframe.repository = NULL; 1237 } 1238 1239 /* put the `.' back if necessary */ 1240 if (stripped_dot) 1241 (void) strcpy (update_dir, "."); 1242 1243 /* call-back dir leave proc (if any) */ 1244 if (process_this_directory && frame->dirleaveproc != NULL) 1245 err = frame->dirleaveproc (frame->callerdat, dir, err, update_dir, 1246 frent->entries); 1247 1248 /* get back to where we started and restore state vars */ 1249 if (restore_cwd (&cwd)) 1250 error (1, errno, "Failed to restore current directory, `%s'.", 1251 cwd.name); 1252 free_cwd (&cwd); 1253 dirlist = sdirlist; 1254 repository = srepository; 1255 } 1256 1257 free (update_dir); 1258 update_dir = saved_update_dir; 1259 1260 return err; 1261 } 1262 1263 /* 1264 * Add a node to a list allocating the list if necessary. 1265 */ 1266 static void 1267 addlist (List **listp, char *key) 1268 { 1269 Node *p; 1270 1271 if (*listp == NULL) 1272 *listp = getlist (); 1273 p = getnode (); 1274 p->type = FILES; 1275 p->key = xstrdup (key); 1276 if (addnode (*listp, p) != 0) 1277 freenode (p); 1278 } 1279 1280 static void 1281 addfile (List **listp, char *dir, char *file) 1282 { 1283 Node *n; 1284 List *fl; 1285 1286 /* add this dir. */ 1287 addlist (listp, dir); 1288 1289 n = findnode (*listp, dir); 1290 if (n == NULL) 1291 { 1292 error (1, 0, "can't find recently added dir node `%s' in start_recursion.", 1293 dir); 1294 } 1295 1296 n->type = DIRS; 1297 fl = n->data; 1298 addlist (&fl, file); 1299 n->data = fl; 1300 return; 1301 } 1302 1303 static int 1304 unroll_files_proc (Node *p, void *closure) 1305 { 1306 Node *n; 1307 struct recursion_frame *frame = (struct recursion_frame *) closure; 1308 int err = 0; 1309 List *save_dirlist; 1310 char *save_update_dir = NULL; 1311 struct saved_cwd cwd; 1312 1313 /* if this dir was also an explicitly named argument, then skip 1314 it. We'll catch it later when we do dirs. */ 1315 n = findnode (dirlist, p->key); 1316 if (n != NULL) 1317 return (0); 1318 1319 /* otherwise, call dorecusion for this list of files. */ 1320 filelist = p->data; 1321 p->data = NULL; 1322 save_dirlist = dirlist; 1323 dirlist = NULL; 1324 1325 if (strcmp(p->key, ".") != 0) 1326 { 1327 if (save_cwd (&cwd)) 1328 error (1, errno, "Failed to save current directory."); 1329 if ( CVS_CHDIR (p->key) < 0) 1330 error (1, errno, "could not chdir to %s", p->key); 1331 1332 save_update_dir = update_dir; 1333 update_dir = xmalloc (strlen (save_update_dir) 1334 + strlen (p->key) 1335 + 5); 1336 strcpy (update_dir, save_update_dir); 1337 1338 if (*update_dir != '\0') 1339 (void) strcat (update_dir, "/"); 1340 1341 (void) strcat (update_dir, p->key); 1342 } 1343 1344 err += do_recursion (frame); 1345 1346 if (save_update_dir != NULL) 1347 { 1348 free (update_dir); 1349 update_dir = save_update_dir; 1350 1351 if (restore_cwd (&cwd)) 1352 error (1, errno, "Failed to restore current directory, `%s'.", 1353 cwd.name); 1354 free_cwd (&cwd); 1355 } 1356 1357 dirlist = save_dirlist; 1358 if (filelist) 1359 dellist (&filelist); 1360 return(err); 1361 } 1362 /* vim:tabstop=8:shiftwidth=4 1363 */ 1364