1 /* 2 * RCS file name handling 3 */ 4 /**************************************************************************** 5 * creation and deletion of /tmp temporaries 6 * pairing of RCS file names and working file names. 7 * Testprogram: define PAIRTEST 8 **************************************************************************** 9 */ 10 11 /* Copyright (C) 1982, 1988, 1989 Walter Tichy 12 Copyright 1990, 1991 by Paul Eggert 13 Distributed under license by the Free Software Foundation, Inc. 14 15 This file is part of RCS. 16 17 RCS is free software; you can redistribute it and/or modify 18 it under the terms of the GNU General Public License as published by 19 the Free Software Foundation; either version 2, or (at your option) 20 any later version. 21 22 RCS is distributed in the hope that it will be useful, 23 but WITHOUT ANY WARRANTY; without even the implied warranty of 24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 GNU General Public License for more details. 26 27 You should have received a copy of the GNU General Public License 28 along with RCS; see the file COPYING. If not, write to 29 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 30 31 Report problems and direct all questions to: 32 33 rcs-bugs@cs.purdue.edu 34 35 */ 36 37 38 39 40 /* $Log: rcsfnms.c,v $ 41 * Revision 5.8 1991/09/24 00:28:40 eggert 42 * Don't export bindex(). 43 * 44 * Revision 5.7 1991/08/19 03:13:55 eggert 45 * Fix messages when rcswriteopen fails. 46 * Look in $TMP and $TEMP if $TMPDIR isn't set. Tune. 47 * 48 * Revision 5.6 1991/04/21 11:58:23 eggert 49 * Fix errno bugs. Add -x, RCSINIT, MS-DOS support. 50 * 51 * Revision 5.5 1991/02/26 17:48:38 eggert 52 * Fix setuid bug. Support new link behavior. 53 * Define more portable getcwd(). 54 * 55 * Revision 5.4 1990/11/01 05:03:43 eggert 56 * Permit arbitrary data in comment leaders. 57 * 58 * Revision 5.3 1990/09/14 22:56:16 hammer 59 * added more filename extensions and their comment leaders 60 * 61 * Revision 5.2 1990/09/04 08:02:23 eggert 62 * Fix typo when !RCSSEP. 63 * 64 * Revision 5.1 1990/08/29 07:13:59 eggert 65 * Work around buggy compilers with defective argument promotion. 66 * 67 * Revision 5.0 1990/08/22 08:12:50 eggert 68 * Ignore signals when manipulating the semaphore file. 69 * Modernize list of file name extensions. 70 * Permit paths of arbitrary length. Beware file names beginning with "-". 71 * Remove compile-time limits; use malloc instead. 72 * Permit dates past 1999/12/31. Make lock and temp files faster and safer. 73 * Ansify and Posixate. 74 * Don't use access(). Fix test for non-regular files. Tune. 75 * 76 * Revision 4.8 89/05/01 15:09:41 narten 77 * changed getwd to not stat empty directories. 78 * 79 * Revision 4.7 88/08/09 19:12:53 eggert 80 * Fix troff macro comment leader bug; add Prolog; allow cc -R; remove lint. 81 * 82 * Revision 4.6 87/12/18 11:40:23 narten 83 * additional file types added from 4.3 BSD version, and SPARC assembler 84 * comment character added. Also, more lint cleanups. (Guy Harris) 85 * 86 * Revision 4.5 87/10/18 10:34:16 narten 87 * Updating version numbers. Changes relative to 1.1 actually relative 88 * to verion 4.3 89 * 90 * Revision 1.3 87/03/27 14:22:21 jenkins 91 * Port to suns 92 * 93 * Revision 1.2 85/06/26 07:34:28 svb 94 * Comment leader '% ' for '*.tex' files added. 95 * 96 * Revision 4.3 83/12/15 12:26:48 wft 97 * Added check for KDELIM in file names to pairfilenames(). 98 * 99 * Revision 4.2 83/12/02 22:47:45 wft 100 * Added csh, red, and sl file name suffixes. 101 * 102 * Revision 4.1 83/05/11 16:23:39 wft 103 * Added initialization of Dbranch to InitAdmin(). Canged pairfilenames(): 104 * 1. added copying of path from workfile to RCS file, if RCS file is omitted; 105 * 2. added getting the file status of RCS and working files; 106 * 3. added ignoring of directories. 107 * 108 * Revision 3.7 83/05/11 15:01:58 wft 109 * Added comtable[] which pairs file name suffixes with comment leaders; 110 * updated InitAdmin() accordingly. 111 * 112 * Revision 3.6 83/04/05 14:47:36 wft 113 * fixed Suffix in InitAdmin(). 114 * 115 * Revision 3.5 83/01/17 18:01:04 wft 116 * Added getwd() and rename(); these can be removed by defining 117 * V4_2BSD, since they are not needed in 4.2 bsd. 118 * Changed sys/param.h to sys/types.h. 119 * 120 * Revision 3.4 82/12/08 21:55:20 wft 121 * removed unused variable. 122 * 123 * Revision 3.3 82/11/28 20:31:37 wft 124 * Changed mktempfile() to store the generated file names. 125 * Changed getfullRCSname() to store the file and pathname, and to 126 * delete leading "../" and "./". 127 * 128 * Revision 3.2 82/11/12 14:29:40 wft 129 * changed pairfilenames() to handle file.sfx,v; also deleted checkpathnosfx(), 130 * checksuffix(), checkfullpath(). Semaphore name generation updated. 131 * mktempfile() now checks for nil path; freefilename initialized properly. 132 * Added Suffix .h to InitAdmin. Added testprogram PAIRTEST. 133 * Moved rmsema, trysema, trydiraccess, getfullRCSname from rcsutil.c to here. 134 * 135 * Revision 3.1 82/10/18 14:51:28 wft 136 * InitAdmin() now initializes StrictLocks=STRICT_LOCKING (def. in rcsbase.h). 137 * renamed checkpath() to checkfullpath(). 138 */ 139 140 141 #include "rcsbase.h" 142 143 libId(fnmsId, "$Id: rcsfnms.c,v 5.8 1991/09/24 00:28:40 eggert Exp $") 144 145 char const *RCSfilename; 146 char *workfilename; 147 FILE *workstdout; 148 struct stat RCSstat; 149 char const *suffixes; 150 151 static char const rcsdir[] = "RCS"; 152 #define rcsdirlen (sizeof(rcsdir)-1) 153 154 static struct buf RCSbuf, RCSb; 155 static int RCSerrno; 156 157 158 /* Temp file names to be unlinked when done, if they are not nil. */ 159 #define TEMPNAMES 5 /* must be at least DIRTEMPNAMES (see rcsedit.c) */ 160 static char *volatile tfnames[TEMPNAMES]; 161 162 163 struct compair { 164 char const *suffix, *comlead; 165 }; 166 167 static struct compair const comtable[] = { 168 /* comtable pairs each filename suffix with a comment leader. The comment */ 169 /* leader is placed before each line generated by the $Log keyword. This */ 170 /* table is used to guess the proper comment leader from the working file's */ 171 /* suffix during initial ci (see InitAdmin()). Comment leaders are needed */ 172 /* for languages without multiline comments; for others they are optional. */ 173 "a", "-- ", /* Ada */ 174 "ada", "-- ", 175 "asm", ";; ", /* assembler (MS-DOS) */ 176 "bat", ":: ", /* batch (MS-DOS) */ 177 "c", " * ", /* C */ 178 "c++", "// ", /* C++ in all its infinite guises */ 179 "cc", "// ", 180 "cpp", "// ", 181 "cxx", "// ", 182 "cl", ";;; ", /* Common Lisp */ 183 "cmd", ":: ", /* command (OS/2) */ 184 "cmf", "c ", /* CM Fortran */ 185 "cs", " * ", /* C* */ 186 "el", "; ", /* Emacs Lisp */ 187 "f", "c ", /* Fortran */ 188 "for", "c ", 189 "h", " * ", /* C-header */ 190 "hpp", "// ", /* C++ header */ 191 "hxx", "// ", 192 "l", " * ", /* lex NOTE: conflict between lex and franzlisp */ 193 "lisp",";;; ", /* Lucid Lisp */ 194 "lsp", ";; ", /* Microsoft Lisp */ 195 "mac", ";; ", /* macro (DEC-10, MS-DOS, PDP-11, VMS, etc) */ 196 "me", ".\\\" ",/* me-macros t/nroff*/ 197 "ml", "; ", /* mocklisp */ 198 "mm", ".\\\" ",/* mm-macros t/nroff*/ 199 "ms", ".\\\" ",/* ms-macros t/nroff*/ 200 "p", " * ", /* Pascal */ 201 "pas", " * ", 202 "pl", "% ", /* Prolog */ 203 "tex", "% ", /* TeX */ 204 "y", " * ", /* yacc */ 205 nil, "# " /* default for unknown suffix; must always be last */ 206 }; 207 208 #if has_mktemp 209 static char const * 210 tmp() 211 /* Yield the name of the tmp directory. */ 212 { 213 static char const *s; 214 if (!s 215 && !(s = cgetenv("TMPDIR")) /* Unix tradition */ 216 && !(s = cgetenv("TMP")) /* DOS tradition */ 217 && !(s = cgetenv("TEMP")) /* another DOS tradition */ 218 ) 219 s = TMPDIR; 220 return s; 221 } 222 #endif 223 224 char const * 225 maketemp(n) 226 int n; 227 /* Create a unique filename using n and the process id and store it 228 * into the nth slot in tfnames. 229 * Because of storage in tfnames, tempunlink() can unlink the file later. 230 * Returns a pointer to the filename created. 231 */ 232 { 233 char *p; 234 char const *t = tfnames[n]; 235 236 if (t) 237 return t; 238 239 catchints(); 240 { 241 # if has_mktemp 242 char const *tp = tmp(); 243 p = testalloc(strlen(tp) + 10); 244 VOID sprintf(p, "%s%cT%cXXXXXX", tp, SLASH, '0'+n); 245 if (!mktemp(p) || !*p) 246 faterror("can't make temporary file name `%s%cT%cXXXXXX'", 247 tp, SLASH, '0'+n 248 ); 249 # else 250 static char tfnamebuf[TEMPNAMES][L_tmpnam]; 251 p = tfnamebuf[n]; 252 if (!tmpnam(p) || !*p) 253 # ifdef P_tmpdir 254 faterror("can't make temporary file name `%s...'",P_tmpdir); 255 # else 256 faterror("can't make temporary file name"); 257 # endif 258 # endif 259 } 260 261 tfnames[n] = p; 262 return p; 263 } 264 265 void 266 tempunlink() 267 /* Clean up maketemp() files. May be invoked by signal handler. 268 */ 269 { 270 register int i; 271 register char *p; 272 273 for (i = TEMPNAMES; 0 <= --i; ) 274 if ((p = tfnames[i])) { 275 VOID unlink(p); 276 /* 277 * We would tfree(p) here, 278 * but this might dump core if we're handing a signal. 279 * We're about to exit anyway, so we won't bother. 280 */ 281 tfnames[i] = 0; 282 } 283 } 284 285 286 static char const * 287 bindex(sp,ch) 288 register char const *sp; 289 int ch; 290 /* Function: Finds the last occurrence of character c in string sp 291 * and returns a pointer to the character just beyond it. If the 292 * character doesn't occur in the string, sp is returned. 293 */ 294 { 295 register char const c=ch, *r; 296 r = sp; 297 while (*sp) { 298 if (*sp++ == c) r=sp; 299 } 300 return r; 301 } 302 303 304 305 static int 306 suffix_matches(suffix, pattern) 307 register char const *suffix, *pattern; 308 { 309 register int c; 310 if (!pattern) 311 return true; 312 for (;;) 313 switch (*suffix++ - (c = *pattern++)) { 314 case 0: 315 if (!c) 316 return true; 317 break; 318 319 case 'A'-'a': 320 if (ctab[c] == Letter) 321 break; 322 /* fall into */ 323 default: 324 return false; 325 } 326 } 327 328 329 static void 330 InitAdmin() 331 /* function: initializes an admin node */ 332 { 333 register char const *Suffix; 334 register int i; 335 336 Head=nil; Dbranch=nil; AccessList=nil; Symbols=nil; Locks=nil; 337 StrictLocks=STRICT_LOCKING; 338 339 /* guess the comment leader from the suffix*/ 340 Suffix=bindex(workfilename, '.'); 341 if (Suffix==workfilename) Suffix= ""; /* empty suffix; will get default*/ 342 for (i=0; !suffix_matches(Suffix,comtable[i].suffix); i++) 343 ; 344 Comment.string = comtable[i].comlead; 345 Comment.size = strlen(comtable[i].comlead); 346 Lexinit(); /* note: if !finptr, reads nothing; only initializes */ 347 } 348 349 350 #if defined(_POSIX_NO_TRUNC) 351 # define LONG_NAMES_MAY_BE_SILENTLY_TRUNCATED 0 352 #else 353 # define LONG_NAMES_MAY_BE_SILENTLY_TRUNCATED 1 354 #endif 355 356 #if LONG_NAMES_MAY_BE_SILENTLY_TRUNCATED 357 #ifdef NAME_MAX 358 # define filenametoolong(path) (NAME_MAX < strlen(basename(path))) 359 #else 360 static int 361 filenametoolong(path) 362 char *path; 363 /* Yield true if the last file name in PATH is too long. */ 364 { 365 static unsigned long dot_namemax; 366 367 register size_t namelen; 368 register char *base; 369 register unsigned long namemax; 370 371 base = path + dirlen(path); 372 namelen = strlen(base); 373 if (namelen <= _POSIX_NAME_MAX) /* fast check for shorties */ 374 return false; 375 if (base != path) { 376 *--base = 0; 377 namemax = pathconf(path, _PC_NAME_MAX); 378 *base = SLASH; 379 } else { 380 /* Cache the results for the working directory, for speed. */ 381 if (!dot_namemax) 382 dot_namemax = pathconf(".", _PC_NAME_MAX); 383 namemax = dot_namemax; 384 } 385 /* If pathconf() yielded -1, namemax is now ULONG_MAX. */ 386 return namemax<namelen; 387 } 388 #endif 389 #endif 390 391 void 392 bufalloc(b, size) 393 register struct buf *b; 394 size_t size; 395 /* Ensure *B is a name buffer of at least SIZE bytes. 396 * *B's old contents can be freed; *B's new contents are undefined. 397 */ 398 { 399 if (b->size < size) { 400 if (b->size) 401 tfree(b->string); 402 else 403 b->size = sizeof(malloc_type); 404 while (b->size < size) 405 b->size <<= 1; 406 b->string = tnalloc(char, b->size); 407 } 408 } 409 410 void 411 bufrealloc(b, size) 412 register struct buf *b; 413 size_t size; 414 /* like bufalloc, except *B's old contents, if any, are preserved */ 415 { 416 if (b->size < size) { 417 if (!b->size) 418 bufalloc(b, size); 419 else { 420 while ((b->size <<= 1) < size) 421 ; 422 b->string = trealloc(char, b->string, b->size); 423 } 424 } 425 } 426 427 void 428 bufautoend(b) 429 struct buf *b; 430 /* Free an auto buffer at block exit. */ 431 { 432 if (b->size) 433 tfree(b->string); 434 } 435 436 struct cbuf 437 bufremember(b, s) 438 struct buf *b; 439 size_t s; 440 /* 441 * Free the buffer B with used size S. 442 * Yield a cbuf with identical contents. 443 * The cbuf will be reclaimed when this input file is finished. 444 */ 445 { 446 struct cbuf cb; 447 448 if ((cb.size = s)) 449 cb.string = fremember(trealloc(char, b->string, s)); 450 else { 451 bufautoend(b); /* not really auto */ 452 cb.string = ""; 453 } 454 return cb; 455 } 456 457 char * 458 bufenlarge(b, alim) 459 register struct buf *b; 460 char const **alim; 461 /* Make *B larger. Set *ALIM to its new limit, and yield the relocated value 462 * of its old limit. 463 */ 464 { 465 size_t s = b->size; 466 bufrealloc(b, s + 1); 467 *alim = b->string + b->size; 468 return b->string + s; 469 } 470 471 void 472 bufscat(b, s) 473 struct buf *b; 474 char const *s; 475 /* Concatenate S to B's end. */ 476 { 477 size_t blen = b->string ? strlen(b->string) : 0; 478 bufrealloc(b, blen+strlen(s)+1); 479 VOID strcpy(b->string+blen, s); 480 } 481 482 void 483 bufscpy(b, s) 484 struct buf *b; 485 char const *s; 486 /* Copy S into B. */ 487 { 488 bufalloc(b, strlen(s)+1); 489 VOID strcpy(b->string, s); 490 } 491 492 493 char const * 494 basename(p) 495 char const *p; 496 /* Yield the address of the base filename of the pathname P. */ 497 { 498 register char const *b = p, *q = p; 499 for (;;) 500 switch (*q++) { 501 case SLASHes: b = q; break; 502 case 0: return b; 503 } 504 } 505 506 size_t 507 dirlen(p) 508 char const *p; 509 /* Yield the length of P's directory, including its trailing SLASH. */ 510 { 511 return basename(p) - p; 512 } 513 514 515 static size_t 516 suffixlen(x) 517 char const *x; 518 /* Yield the length of X, an RCS filename suffix. */ 519 { 520 register char const *p; 521 522 p = x; 523 for (;;) 524 switch (*p) { 525 case 0: case SLASHes: 526 return p - x; 527 528 default: 529 ++p; 530 continue; 531 } 532 } 533 534 char const * 535 rcssuffix(name) 536 char const *name; 537 /* Yield the suffix of NAME if it is an RCS filename, 0 otherwise. */ 538 { 539 char const *x, *p, *nz; 540 size_t dl, nl, xl; 541 542 nl = strlen(name); 543 nz = name + nl; 544 x = suffixes; 545 do { 546 if ((xl = suffixlen(x))) { 547 if (xl <= nl && memcmp(p = nz-xl, x, xl) == 0) 548 return p; 549 } else { 550 dl = dirlen(name); 551 if ( 552 rcsdirlen < dl && 553 !memcmp(p = name+(dl-=rcsdirlen+1), rcsdir, rcsdirlen) && 554 (!dl || isSLASH(*--p)) 555 ) 556 return nz; 557 } 558 x += xl; 559 } while (*x++); 560 return 0; 561 } 562 563 /*ARGSUSED*/ RILE * 564 rcsreadopen(RCSname, status, mustread) 565 struct buf *RCSname; 566 struct stat *status; 567 int mustread; 568 /* Open RCSNAME for reading and yield its FILE* descriptor. 569 * If successful, set *STATUS to its status. 570 * Pass this routine to pairfilenames() for read-only access to the file. */ 571 { 572 return Iopen(RCSname->string, FOPEN_R, status); 573 } 574 575 static int 576 finopen(rcsopen, mustread) 577 /* jlf RILE *(*rcsopen)P((struct buf*,struct stat*,int)); */ 578 RILE *(*rcsopen)(); 579 int mustread; 580 /* 581 * Use RCSOPEN to open an RCS file; MUSTREAD is set if the file must be read. 582 * Set finptr to the result and yield true if successful. 583 * RCSb holds the file's name. 584 * Set RCSbuf to the best RCS name found so far, and RCSerrno to its errno. 585 * Yield true if successful or if an unusual failure. 586 */ 587 { 588 int interesting, preferold; 589 590 /* 591 * We prefer an old name to that of a nonexisting new RCS file, 592 * unless we tried locking the old name and failed. 593 */ 594 preferold = RCSbuf.string[0] && (mustread||frewrite); 595 596 finptr = (*rcsopen)(&RCSb, &RCSstat, mustread); 597 interesting = finptr || errno!=ENOENT; 598 if (interesting || !preferold) { 599 /* Use the new name. */ 600 RCSerrno = errno; 601 bufscpy(&RCSbuf, RCSb.string); 602 } 603 return interesting; 604 } 605 606 static int 607 fin2open(d, dlen, base, baselen, x, xlen, rcsopen, mustread) 608 char const *d, *base, *x; 609 size_t dlen, baselen, xlen; 610 /* jlf RILE *(*rcsopen)P((struct buf*,struct stat*,int)); */ 611 RILE *(*rcsopen)(); 612 int mustread; 613 /* 614 * D is a directory name with length DLEN (including trailing slash). 615 * BASE is a filename with length BASELEN. 616 * X is an RCS filename suffix with length XLEN. 617 * Use RCSOPEN to open an RCS file; MUSTREAD is set if the file must be read. 618 * Yield true if successful. 619 * Try dRCS/basex first; if that fails and x is nonempty, try dbasex. 620 * Put these potential names in RCSb. 621 * Set RCSbuf to the best RCS name found so far, and RCSerrno to its errno. 622 * Yield true if successful or if an unusual failure. 623 */ 624 { 625 register char *p; 626 627 bufalloc(&RCSb, dlen + rcsdirlen + 1 + baselen + xlen + 1); 628 629 /* Try dRCS/basex. */ 630 VOID memcpy(p = RCSb.string, d, dlen); 631 VOID memcpy(p += dlen, rcsdir, rcsdirlen); 632 p += rcsdirlen; 633 *p++ = SLASH; 634 VOID memcpy(p, base, baselen); 635 VOID memcpy(p += baselen, x, xlen); 636 p[xlen] = 0; 637 if (xlen) { 638 if (finopen(rcsopen, mustread)) 639 return true; 640 641 /* Try dbasex. */ 642 /* Start from scratch, because finopen() may have changed RCSb. */ 643 VOID memcpy(p = RCSb.string, d, dlen); 644 VOID memcpy(p += dlen, base, baselen); 645 VOID memcpy(p += baselen, x, xlen); 646 p[xlen] = 0; 647 } 648 return finopen(rcsopen, mustread); 649 } 650 651 int 652 pairfilenames(argc, argv, rcsopen, mustread, quiet) 653 int argc; 654 char **argv; 655 /* jlf RILE *(*rcsopen)P((struct buf*,struct stat*,int)); */ 656 RILE *(*rcsopen)(); 657 int mustread, quiet; 658 /* Function: Pairs the filenames pointed to by argv; argc indicates 659 * how many there are. 660 * Places a pointer to the RCS filename into RCSfilename, 661 * and a pointer to the name of the working file into workfilename. 662 * If both the workfilename and the RCS filename are given, and workstdout 663 * is set, a warning is printed. 664 * 665 * If the RCS file exists, places its status into RCSstat. 666 * 667 * If the RCS file exists, it is RCSOPENed for reading, the file pointer 668 * is placed into finptr, and the admin-node is read in; returns 1. 669 * If the RCS file does not exist and MUSTREAD, 670 * print an error unless QUIET and return 0. 671 * Otherwise, initialize the admin node and return -1. 672 * 673 * 0 is returned on all errors, e.g. files that are not regular files. 674 */ 675 { 676 static struct buf tempbuf; 677 678 register char *p, *arg, *RCS1; 679 char const *purefname, *pureRCSname, *x; 680 int paired; 681 size_t arglen, dlen, baselen, xlen; 682 683 if (!(arg = *argv)) return 0; /* already paired filename */ 684 if (*arg == '-') { 685 error("%s option is ignored after file names", arg); 686 return 0; 687 } 688 689 purefname = basename(arg); 690 691 /* Allocate buffer temporary to hold the default paired file name. */ 692 p = arg; 693 for (;;) { 694 switch (*p++) { 695 /* Beware characters that cause havoc with ci -k. */ 696 case KDELIM: 697 error("RCS file name `%s' contains %c", arg, KDELIM); 698 return 0; 699 case ' ': case '\n': case '\t': 700 error("RCS file name `%s' contains white space", arg); 701 return 0; 702 default: 703 continue; 704 case 0: 705 break; 706 } 707 break; 708 } 709 710 paired = false; 711 712 /* first check suffix to see whether it is an RCS file or not */ 713 if ((x = rcssuffix(arg))) 714 { 715 /* RCS file name given*/ 716 RCS1 = arg; 717 pureRCSname = purefname; 718 baselen = x - purefname; 719 if ( 720 1 < argc && 721 !rcssuffix(workfilename = p = argv[1]) && 722 baselen <= (arglen = strlen(p)) && 723 ((p+=arglen-baselen) == workfilename || isSLASH(p[-1])) && 724 memcmp(purefname, p, baselen) == 0 725 ) { 726 argv[1] = 0; 727 paired = true; 728 } else { 729 bufscpy(&tempbuf, purefname); 730 workfilename = p = tempbuf.string; 731 p[baselen] = 0; 732 } 733 } else { 734 /* working file given; now try to find RCS file */ 735 workfilename = arg; 736 baselen = p - purefname - 1; 737 /* derive RCS file name*/ 738 if ( 739 1 < argc && 740 (x = rcssuffix(RCS1 = argv[1])) && 741 baselen <= x - RCS1 && 742 ((pureRCSname=x-baselen)==RCS1 || isSLASH(pureRCSname[-1])) && 743 memcmp(purefname, pureRCSname, baselen) == 0 744 ) { 745 argv[1] = 0; 746 paired = true; 747 } else 748 pureRCSname = RCS1 = 0; 749 } 750 /* now we have a (tentative) RCS filename in RCS1 and workfilename */ 751 /* Second, try to find the right RCS file */ 752 if (pureRCSname!=RCS1) { 753 /* a path for RCSfile is given; single RCS file to look for */ 754 bufscpy(&RCSbuf, RCS1); 755 finptr = (*rcsopen)(&RCSbuf, &RCSstat, mustread); 756 RCSerrno = errno; 757 } else { 758 bufscpy(&RCSbuf, ""); 759 if (RCS1) 760 /* RCS file name was given without path. */ 761 VOID fin2open(arg, (size_t)0, pureRCSname, baselen, 762 x, strlen(x), rcsopen, mustread 763 ); 764 else { 765 /* No RCS file name was given. */ 766 /* Try each suffix in turn. */ 767 dlen = purefname-arg; 768 x = suffixes; 769 while (! fin2open(arg, dlen, purefname, baselen, 770 x, xlen=suffixlen(x), rcsopen, mustread 771 )) { 772 x += xlen; 773 if (!*x++) 774 break; 775 } 776 } 777 } 778 RCSfilename = p = RCSbuf.string; 779 if (finptr) { 780 if (!S_ISREG(RCSstat.st_mode)) { 781 error("%s isn't a regular file -- ignored", p); 782 return 0; 783 } 784 Lexinit(); getadmin(); 785 } else { 786 if (RCSerrno!=ENOENT || mustread || !frewrite) { 787 if (RCSerrno == EEXIST) 788 error("RCS file %s is in use", p); 789 else if (!quiet || RCSerrno!=ENOENT) 790 enerror(RCSerrno, p); 791 return 0; 792 } 793 InitAdmin(); 794 }; 795 # if LONG_NAMES_MAY_BE_SILENTLY_TRUNCATED 796 if (filenametoolong(p)) { 797 error("RCS file name %s is too long", p); 798 return 0; 799 } 800 # ifndef NAME_MAX 801 /* 802 * Check workfilename too, even though it cannot be longer, 803 * because it may reside on a different filesystem. 804 */ 805 if (filenametoolong(workfilename)) { 806 error("working file name %s is too long", workfilename); 807 return 0; 808 } 809 # endif 810 # endif 811 812 if (paired && workstdout) 813 warn("Option -p is set; ignoring output file %s",workfilename); 814 815 prevkeys = false; 816 return finptr ? 1 : -1; 817 } 818 819 820 char const * 821 getfullRCSname() 822 /* Function: returns a pointer to the full path name of the RCS file. 823 * Gets the working directory's name at most once. 824 * Removes leading "../" and "./". 825 */ 826 { 827 static char const *wdptr; 828 static struct buf rcsbuf, wdbuf; 829 static size_t pathlength; 830 831 register char const *realname; 832 register size_t parentdirlength; 833 register unsigned dotdotcounter; 834 register char *d; 835 register char const *wd; 836 837 if (ROOTPATH(RCSfilename)) { 838 return(RCSfilename); 839 } else { 840 if (!(wd = wdptr)) { 841 /* Get working directory for the first time. */ 842 if (!(d = cgetenv("PWD"))) { 843 bufalloc(&wdbuf, SIZEABLE_PATH + 1); 844 # if !has_getcwd && has_getwd 845 d = getwd(wdbuf.string); 846 # else 847 while ( 848 !(d = getcwd(wdbuf.string, wdbuf.size)) 849 && errno==ERANGE 850 ) 851 bufalloc(&wdbuf, wdbuf.size<<1); 852 # endif 853 if (!d) 854 efaterror("working directory"); 855 } 856 parentdirlength = strlen(d); 857 while (parentdirlength && isSLASH(d[parentdirlength-1])) { 858 d[--parentdirlength] = 0; 859 /* Check needed because some getwd implementations */ 860 /* generate "/" for the root. */ 861 } 862 wdptr = wd = d; 863 pathlength = parentdirlength; 864 } 865 /*the following must be redone since RCSfilename may change*/ 866 /* Find how many `../'s to remove from RCSfilename. */ 867 dotdotcounter =0; 868 realname = RCSfilename; 869 while (realname[0]=='.') { 870 if (isSLASH(realname[1])) { 871 /* drop leading ./ */ 872 realname += 2; 873 } else if (realname[1]=='.' && isSLASH(realname[2])) { 874 /* drop leading ../ and remember */ 875 dotdotcounter++; 876 realname += 3; 877 } else 878 break; 879 } 880 /* Now remove dotdotcounter trailing directories from wd. */ 881 parentdirlength = pathlength; 882 while (dotdotcounter && parentdirlength) { 883 /* move pointer backwards over trailing directory */ 884 if (isSLASH(wd[--parentdirlength])) { 885 dotdotcounter--; 886 } 887 } 888 /* build full path name */ 889 bufalloc(&rcsbuf, parentdirlength+strlen(realname)+2); 890 d = rcsbuf.string; 891 VOID memcpy(d, wd, parentdirlength); 892 d += parentdirlength; 893 *d++ = SLASH; 894 VOID strcpy(d, realname); 895 return rcsbuf.string; 896 } 897 } 898 899 #ifndef isSLASH 900 int 901 isSLASH(c) 902 int c; 903 { 904 switch (c) { 905 case SLASHes: 906 return true; 907 default: 908 return false; 909 } 910 } 911 #endif 912 913 914 #if !has_getcwd && !has_getwd 915 916 char * 917 getcwd(path, size) 918 char *path; 919 size_t size; 920 { 921 static char const usrbinpwd[] = "/usr/bin/pwd"; 922 # define binpwd (usrbinpwd+4) 923 924 register FILE *fp; 925 register int c; 926 register char *p, *lim; 927 int closeerrno, closeerror, e, fd[2], readerror, toolong, wstatus; 928 pid_t child; 929 # if !has_waitpid 930 pid_t w; 931 # endif 932 933 if (!size) { 934 errno = EINVAL; 935 return 0; 936 } 937 if (pipe(fd) != 0) 938 return 0; 939 if (!(child = vfork())) { 940 if ( 941 close(fd[0]) == 0 && 942 (fd[1] == STDOUT_FILENO || 943 # ifdef F_DUPFD 944 (VOID close(STDOUT_FILENO), 945 fcntl(fd[1], F_DUPFD, STDOUT_FILENO)) 946 # else 947 dup2(fd[1], STDOUT_FILENO) 948 # endif 949 == STDOUT_FILENO && 950 close(fd[1]) == 0 951 ) 952 ) { 953 VOID close(STDERR_FILENO); 954 VOID execl(binpwd, binpwd, (char *)0); 955 VOID execl(usrbinpwd, usrbinpwd, (char *)0); 956 } 957 _exit(EXIT_FAILURE); 958 } 959 e = errno; 960 closeerror = close(fd[1]); 961 closeerrno = errno; 962 fp = 0; 963 readerror = toolong = wstatus = 0; 964 p = path; 965 if (0 <= child) { 966 fp = fdopen(fd[0], "r"); 967 e = errno; 968 if (fp) { 969 lim = p + size; 970 for (p = path; ; *p++ = c) { 971 if ((c=getc(fp)) < 0) { 972 if (feof(fp)) 973 break; 974 if (ferror(fp)) { 975 readerror = 1; 976 e = errno; 977 break; 978 } 979 } 980 if (p == lim) { 981 toolong = 1; 982 break; 983 } 984 } 985 } 986 # if has_waitpid 987 if (waitpid(child, &wstatus, 0) < 0) 988 wstatus = 1; 989 # else 990 do { 991 if ((w = wait(&wstatus)) < 0) { 992 wstatus = 1; 993 break; 994 } 995 } while (w != child); 996 # endif 997 } 998 if (!fp) { 999 VOID close(fd[0]); 1000 errno = e; 1001 return 0; 1002 } 1003 if (fclose(fp) != 0) 1004 return 0; 1005 if (readerror) { 1006 errno = e; 1007 return 0; 1008 } 1009 if (closeerror) { 1010 errno = closeerrno; 1011 return 0; 1012 } 1013 if (toolong) { 1014 errno = ERANGE; 1015 return 0; 1016 } 1017 if (wstatus || p == path || *--p != '\n') { 1018 errno = EACCES; 1019 return 0; 1020 } 1021 *p = '\0'; 1022 return path; 1023 } 1024 #endif 1025 1026 1027 #ifdef PAIRTEST 1028 /* test program for pairfilenames() and getfullRCSname() */ 1029 1030 char const cmdid[] = "pair"; 1031 1032 main(argc, argv) 1033 int argc; char *argv[]; 1034 { 1035 int result; 1036 int initflag; 1037 quietflag = initflag = false; 1038 1039 while(--argc, ++argv, argc>=1 && ((*argv)[0] == '-')) { 1040 switch ((*argv)[1]) { 1041 1042 case 'p': workstdout = stdout; 1043 break; 1044 case 'i': initflag=true; 1045 break; 1046 case 'q': quietflag=true; 1047 break; 1048 default: error("unknown option: %s", *argv); 1049 break; 1050 } 1051 } 1052 1053 do { 1054 RCSfilename=workfilename=nil; 1055 result = pairfilenames(argc,argv,rcsreadopen,!initflag,quietflag); 1056 if (result!=0) { 1057 diagnose("RCS file: %s; working file: %s\nFull RCS file name: %s\n", 1058 RCSfilename,workfilename,getfullRCSname() 1059 ); 1060 } 1061 switch (result) { 1062 case 0: continue; /* already paired file */ 1063 1064 case 1: if (initflag) { 1065 error("RCS file %s exists already",RCSfilename); 1066 } else { 1067 diagnose("RCS file %s exists\n",RCSfilename); 1068 } 1069 Ifclose(finptr); 1070 break; 1071 1072 case -1:diagnose("RCS file doesn't exist\n"); 1073 break; 1074 } 1075 1076 } while (++argv, --argc>=1); 1077 1078 } 1079 1080 exiting void 1081 exiterr() 1082 { 1083 dirtempunlink(); 1084 tempunlink(); 1085 _exit(EXIT_FAILURE); 1086 } 1087 #endif 1088