rcs.c revision 1.83
1/* $OpenBSD: rcs.c,v 1.83 2015/06/13 20:15:21 nicm Exp $ */ 2/* 3 * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 16 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 17 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 18 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/param.h> /* MAXBSIZE */ 28#include <sys/stat.h> 29 30#include <ctype.h> 31#include <err.h> 32#include <errno.h> 33#include <libgen.h> 34#include <pwd.h> 35#include <stdarg.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <unistd.h> 40 41#include "diff.h" 42#include "rcs.h" 43#include "rcsparse.h" 44#include "rcsprog.h" 45#include "rcsutil.h" 46#include "xmalloc.h" 47 48#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) 49 50/* invalid characters in RCS states */ 51static const char rcs_state_invch[] = RCS_STATE_INVALCHAR; 52 53/* invalid characters in RCS symbol names */ 54static const char rcs_sym_invch[] = RCS_SYM_INVALCHAR; 55 56struct rcs_kw rcs_expkw[] = { 57 { "Author", RCS_KW_AUTHOR }, 58 { "Date", RCS_KW_DATE }, 59 { "Locker", RCS_KW_LOCKER }, 60 { "Header", RCS_KW_HEADER }, 61 { "Id", RCS_KW_ID }, 62 { "OpenBSD", RCS_KW_ID }, 63 { "Log", RCS_KW_LOG }, 64 { "Name", RCS_KW_NAME }, 65 { "RCSfile", RCS_KW_RCSFILE }, 66 { "Revision", RCS_KW_REVISION }, 67 { "Source", RCS_KW_SOURCE }, 68 { "State", RCS_KW_STATE }, 69}; 70 71int rcs_errno = RCS_ERR_NOERR; 72char *timezone_flag = NULL; 73 74int rcs_patch_lines(struct rcs_lines *, struct rcs_lines *); 75static int rcs_movefile(char *, char *, mode_t, u_int); 76 77static void rcs_freedelta(struct rcs_delta *); 78static void rcs_strprint(const u_char *, size_t, FILE *); 79 80static BUF *rcs_expand_keywords(char *, struct rcs_delta *, BUF *, int); 81 82RCSFILE * 83rcs_open(const char *path, int fd, int flags, ...) 84{ 85 int mode; 86 mode_t fmode; 87 RCSFILE *rfp; 88 va_list vap; 89 struct rcs_delta *rdp; 90 struct rcs_lock *lkr; 91 92 fmode = S_IRUSR|S_IRGRP|S_IROTH; 93 flags &= 0xffff; /* ditch any internal flags */ 94 95 if (flags & RCS_CREATE) { 96 va_start(vap, flags); 97 mode = va_arg(vap, int); 98 va_end(vap); 99 fmode = (mode_t)mode; 100 } 101 102 rfp = xcalloc(1, sizeof(*rfp)); 103 104 rfp->rf_path = xstrdup(path); 105 rfp->rf_flags = flags | RCS_SLOCK | RCS_SYNCED; 106 rfp->rf_mode = fmode; 107 if (fd == -1) 108 rfp->rf_file = NULL; 109 else if ((rfp->rf_file = fdopen(fd, "r")) == NULL) 110 err(1, "rcs_open: fdopen: `%s'", path); 111 112 TAILQ_INIT(&(rfp->rf_delta)); 113 TAILQ_INIT(&(rfp->rf_access)); 114 TAILQ_INIT(&(rfp->rf_symbols)); 115 TAILQ_INIT(&(rfp->rf_locks)); 116 117 if (!(rfp->rf_flags & RCS_CREATE)) { 118 if (rcsparse_init(rfp)) 119 errx(1, "could not parse admin data"); 120 121 /* fill in rd_locker */ 122 TAILQ_FOREACH(lkr, &(rfp->rf_locks), rl_list) { 123 if ((rdp = rcs_findrev(rfp, lkr->rl_num)) == NULL) { 124 rcs_close(rfp); 125 return (NULL); 126 } 127 128 rdp->rd_locker = xstrdup(lkr->rl_name); 129 } 130 } 131 132 return (rfp); 133} 134 135/* 136 * rcs_close() 137 * 138 * Close an RCS file handle. 139 */ 140void 141rcs_close(RCSFILE *rfp) 142{ 143 struct rcs_delta *rdp; 144 struct rcs_access *rap; 145 struct rcs_lock *rlp; 146 struct rcs_sym *rsp; 147 148 if ((rfp->rf_flags & RCS_WRITE) && !(rfp->rf_flags & RCS_SYNCED)) 149 rcs_write(rfp); 150 151 while (!TAILQ_EMPTY(&(rfp->rf_delta))) { 152 rdp = TAILQ_FIRST(&(rfp->rf_delta)); 153 TAILQ_REMOVE(&(rfp->rf_delta), rdp, rd_list); 154 rcs_freedelta(rdp); 155 } 156 157 while (!TAILQ_EMPTY(&(rfp->rf_access))) { 158 rap = TAILQ_FIRST(&(rfp->rf_access)); 159 TAILQ_REMOVE(&(rfp->rf_access), rap, ra_list); 160 free(rap->ra_name); 161 free(rap); 162 } 163 164 while (!TAILQ_EMPTY(&(rfp->rf_symbols))) { 165 rsp = TAILQ_FIRST(&(rfp->rf_symbols)); 166 TAILQ_REMOVE(&(rfp->rf_symbols), rsp, rs_list); 167 rcsnum_free(rsp->rs_num); 168 free(rsp->rs_name); 169 free(rsp); 170 } 171 172 while (!TAILQ_EMPTY(&(rfp->rf_locks))) { 173 rlp = TAILQ_FIRST(&(rfp->rf_locks)); 174 TAILQ_REMOVE(&(rfp->rf_locks), rlp, rl_list); 175 rcsnum_free(rlp->rl_num); 176 free(rlp->rl_name); 177 free(rlp); 178 } 179 180 if (rfp->rf_head != NULL) 181 rcsnum_free(rfp->rf_head); 182 if (rfp->rf_branch != NULL) 183 rcsnum_free(rfp->rf_branch); 184 185 if (rfp->rf_file != NULL) 186 fclose(rfp->rf_file); 187 188 free(rfp->rf_path); 189 free(rfp->rf_comment); 190 free(rfp->rf_expand); 191 free(rfp->rf_desc); 192 if (rfp->rf_pdata != NULL) 193 rcsparse_free(rfp); 194 195 free(rfp); 196} 197 198/* 199 * rcs_write() 200 * 201 * Write the contents of the RCS file handle <rfp> to disk in the file whose 202 * path is in <rf_path>. 203 */ 204void 205rcs_write(RCSFILE *rfp) 206{ 207 FILE *fp; 208 char numbuf[RCS_REV_BUFSZ], *fn; 209 struct rcs_access *ap; 210 struct rcs_sym *symp; 211 struct rcs_branch *brp; 212 struct rcs_delta *rdp; 213 struct rcs_lock *lkp; 214 size_t len; 215 int fd; 216 217 fn = NULL; 218 219 if (rfp->rf_flags & RCS_SYNCED) 220 return; 221 222 /* Write operations need the whole file parsed */ 223 if (rcsparse_deltatexts(rfp, NULL)) 224 errx(1, "problem parsing deltatexts"); 225 226 (void)xasprintf(&fn, "%s/rcs.XXXXXXXXXX", rcs_tmpdir); 227 228 if ((fd = mkstemp(fn)) == -1) 229 err(1, "%s", fn); 230 231 if ((fp = fdopen(fd, "w+")) == NULL) { 232 int saved_errno; 233 234 saved_errno = errno; 235 (void)unlink(fn); 236 errno = saved_errno; 237 err(1, "%s", fn); 238 } 239 240 worklist_add(fn, &temp_files); 241 242 if (rfp->rf_head != NULL) 243 rcsnum_tostr(rfp->rf_head, numbuf, sizeof(numbuf)); 244 else 245 numbuf[0] = '\0'; 246 247 fprintf(fp, "head\t%s;\n", numbuf); 248 249 if (rfp->rf_branch != NULL) { 250 rcsnum_tostr(rfp->rf_branch, numbuf, sizeof(numbuf)); 251 fprintf(fp, "branch\t%s;\n", numbuf); 252 } 253 254 fputs("access", fp); 255 TAILQ_FOREACH(ap, &(rfp->rf_access), ra_list) { 256 fprintf(fp, "\n\t%s", ap->ra_name); 257 } 258 fputs(";\n", fp); 259 260 fprintf(fp, "symbols"); 261 TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) { 262 if (RCSNUM_ISBRANCH(symp->rs_num)) 263 rcsnum_addmagic(symp->rs_num); 264 rcsnum_tostr(symp->rs_num, numbuf, sizeof(numbuf)); 265 fprintf(fp, "\n\t%s:%s", symp->rs_name, numbuf); 266 } 267 fprintf(fp, ";\n"); 268 269 fprintf(fp, "locks"); 270 TAILQ_FOREACH(lkp, &(rfp->rf_locks), rl_list) { 271 rcsnum_tostr(lkp->rl_num, numbuf, sizeof(numbuf)); 272 fprintf(fp, "\n\t%s:%s", lkp->rl_name, numbuf); 273 } 274 275 fprintf(fp, ";"); 276 277 if (rfp->rf_flags & RCS_SLOCK) 278 fprintf(fp, " strict;"); 279 fputc('\n', fp); 280 281 fputs("comment\t@", fp); 282 if (rfp->rf_comment != NULL) { 283 rcs_strprint((const u_char *)rfp->rf_comment, 284 strlen(rfp->rf_comment), fp); 285 fputs("@;\n", fp); 286 } else 287 fputs("# @;\n", fp); 288 289 if (rfp->rf_expand != NULL) { 290 fputs("expand @", fp); 291 rcs_strprint((const u_char *)rfp->rf_expand, 292 strlen(rfp->rf_expand), fp); 293 fputs("@;\n", fp); 294 } 295 296 fputs("\n\n", fp); 297 298 TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) { 299 fprintf(fp, "%s\n", rcsnum_tostr(rdp->rd_num, numbuf, 300 sizeof(numbuf))); 301 fprintf(fp, "date\t%d.%02d.%02d.%02d.%02d.%02d;", 302 rdp->rd_date.tm_year + 1900, rdp->rd_date.tm_mon + 1, 303 rdp->rd_date.tm_mday, rdp->rd_date.tm_hour, 304 rdp->rd_date.tm_min, rdp->rd_date.tm_sec); 305 fprintf(fp, "\tauthor %s;\tstate %s;\n", 306 rdp->rd_author, rdp->rd_state); 307 fputs("branches", fp); 308 TAILQ_FOREACH(brp, &(rdp->rd_branches), rb_list) { 309 fprintf(fp, "\n\t%s", rcsnum_tostr(brp->rb_num, numbuf, 310 sizeof(numbuf))); 311 } 312 fputs(";\n", fp); 313 fprintf(fp, "next\t%s;\n\n", rcsnum_tostr(rdp->rd_next, 314 numbuf, sizeof(numbuf))); 315 } 316 317 fputs("\ndesc\n@", fp); 318 if (rfp->rf_desc != NULL && (len = strlen(rfp->rf_desc)) > 0) { 319 rcs_strprint((const u_char *)rfp->rf_desc, len, fp); 320 if (rfp->rf_desc[len-1] != '\n') 321 fputc('\n', fp); 322 } 323 fputs("@\n", fp); 324 325 /* deltatexts */ 326 TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) { 327 fprintf(fp, "\n\n%s\n", rcsnum_tostr(rdp->rd_num, numbuf, 328 sizeof(numbuf))); 329 fputs("log\n@", fp); 330 if (rdp->rd_log != NULL) { 331 len = strlen(rdp->rd_log); 332 rcs_strprint((const u_char *)rdp->rd_log, len, fp); 333 if (len == 0 || rdp->rd_log[len-1] != '\n') 334 fputc('\n', fp); 335 } 336 fputs("@\ntext\n@", fp); 337 if (rdp->rd_text != NULL) 338 rcs_strprint(rdp->rd_text, rdp->rd_tlen, fp); 339 fputs("@\n", fp); 340 } 341 (void)fclose(fp); 342 343 if (rcs_movefile(fn, rfp->rf_path, rfp->rf_mode, rfp->rf_flags) == -1) { 344 (void)unlink(fn); 345 errx(1, "rcs_movefile failed"); 346 } 347 348 rfp->rf_flags |= RCS_SYNCED; 349 350 free(fn); 351} 352 353/* 354 * rcs_movefile() 355 * 356 * Move a file using rename(2) if possible and copying if not. 357 * Returns 0 on success, -1 on failure. 358 */ 359static int 360rcs_movefile(char *from, char *to, mode_t perm, u_int to_flags) 361{ 362 FILE *src, *dst; 363 size_t nread, nwritten; 364 char *buf; 365 366 if (rename(from, to) == 0) { 367 if (chmod(to, perm) == -1) { 368 warn("%s", to); 369 return (-1); 370 } 371 return (0); 372 } else if (errno != EXDEV) { 373 warn("failed to access temp RCS output file"); 374 return (-1); 375 } 376 377 if ((chmod(to, S_IWUSR) == -1) && !(to_flags & RCS_CREATE)) { 378 warnx("chmod(%s, 0%o) failed", to, S_IWUSR); 379 return (-1); 380 } 381 382 /* different filesystem, have to copy the file */ 383 if ((src = fopen(from, "r")) == NULL) { 384 warn("%s", from); 385 return (-1); 386 } 387 if ((dst = fopen(to, "w")) == NULL) { 388 warn("%s", to); 389 (void)fclose(src); 390 return (-1); 391 } 392 if (fchmod(fileno(dst), perm)) { 393 warn("%s", to); 394 (void)unlink(to); 395 (void)fclose(src); 396 (void)fclose(dst); 397 return (-1); 398 } 399 400 buf = xmalloc(MAXBSIZE); 401 while ((nread = fread(buf, sizeof(char), MAXBSIZE, src)) != 0) { 402 if (ferror(src)) { 403 warnx("failed to read `%s'", from); 404 (void)unlink(to); 405 goto out; 406 } 407 nwritten = fwrite(buf, sizeof(char), nread, dst); 408 if (nwritten != nread) { 409 warnx("failed to write `%s'", to); 410 (void)unlink(to); 411 goto out; 412 } 413 } 414 415 (void)unlink(from); 416 417out: 418 (void)fclose(src); 419 (void)fclose(dst); 420 free(buf); 421 422 return (0); 423} 424 425/* 426 * rcs_head_set() 427 * 428 * Set the revision number of the head revision for the RCS file <file> to 429 * <rev>, which must reference a valid revision within the file. 430 */ 431int 432rcs_head_set(RCSFILE *file, RCSNUM *rev) 433{ 434 if (rcs_findrev(file, rev) == NULL) 435 return (-1); 436 437 if (file->rf_head == NULL) 438 file->rf_head = rcsnum_alloc(); 439 440 rcsnum_cpy(rev, file->rf_head, 0); 441 file->rf_flags &= ~RCS_SYNCED; 442 return (0); 443} 444 445 446/* 447 * rcs_branch_get() 448 * 449 * Retrieve the default branch number for the RCS file <file>. 450 * Returns the number on success. If NULL is returned, then there is no 451 * default branch for this file. 452 */ 453const RCSNUM * 454rcs_branch_get(RCSFILE *file) 455{ 456 return (file->rf_branch); 457} 458 459/* 460 * rcs_access_add() 461 * 462 * Add the login name <login> to the access list for the RCS file <file>. 463 * Returns 0 on success, or -1 on failure. 464 */ 465int 466rcs_access_add(RCSFILE *file, const char *login) 467{ 468 struct rcs_access *ap; 469 470 /* first look for duplication */ 471 TAILQ_FOREACH(ap, &(file->rf_access), ra_list) { 472 if (strcmp(ap->ra_name, login) == 0) { 473 rcs_errno = RCS_ERR_DUPENT; 474 return (-1); 475 } 476 } 477 478 ap = xmalloc(sizeof(*ap)); 479 ap->ra_name = xstrdup(login); 480 TAILQ_INSERT_TAIL(&(file->rf_access), ap, ra_list); 481 482 /* not synced anymore */ 483 file->rf_flags &= ~RCS_SYNCED; 484 return (0); 485} 486 487/* 488 * rcs_access_remove() 489 * 490 * Remove an entry with login name <login> from the access list of the RCS 491 * file <file>. 492 * Returns 0 on success, or -1 on failure. 493 */ 494int 495rcs_access_remove(RCSFILE *file, const char *login) 496{ 497 struct rcs_access *ap; 498 499 TAILQ_FOREACH(ap, &(file->rf_access), ra_list) 500 if (strcmp(ap->ra_name, login) == 0) 501 break; 502 503 if (ap == NULL) { 504 rcs_errno = RCS_ERR_NOENT; 505 return (-1); 506 } 507 508 TAILQ_REMOVE(&(file->rf_access), ap, ra_list); 509 free(ap->ra_name); 510 free(ap); 511 512 /* not synced anymore */ 513 file->rf_flags &= ~RCS_SYNCED; 514 return (0); 515} 516 517/* 518 * rcs_sym_add() 519 * 520 * Add a symbol to the list of symbols for the RCS file <rfp>. The new symbol 521 * is named <sym> and is bound to the RCS revision <snum>. 522 * Returns 0 on success, or -1 on failure. 523 */ 524int 525rcs_sym_add(RCSFILE *rfp, const char *sym, RCSNUM *snum) 526{ 527 struct rcs_sym *symp; 528 529 if (!rcs_sym_check(sym)) { 530 rcs_errno = RCS_ERR_BADSYM; 531 return (-1); 532 } 533 534 /* first look for duplication */ 535 TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) { 536 if (strcmp(symp->rs_name, sym) == 0) { 537 rcs_errno = RCS_ERR_DUPENT; 538 return (-1); 539 } 540 } 541 542 symp = xmalloc(sizeof(*symp)); 543 symp->rs_name = xstrdup(sym); 544 symp->rs_num = rcsnum_alloc(); 545 rcsnum_cpy(snum, symp->rs_num, 0); 546 547 TAILQ_INSERT_HEAD(&(rfp->rf_symbols), symp, rs_list); 548 549 /* not synced anymore */ 550 rfp->rf_flags &= ~RCS_SYNCED; 551 return (0); 552} 553 554/* 555 * rcs_sym_remove() 556 * 557 * Remove the symbol with name <sym> from the symbol list for the RCS file 558 * <file>. If no such symbol is found, the call fails and returns with an 559 * error. 560 * Returns 0 on success, or -1 on failure. 561 */ 562int 563rcs_sym_remove(RCSFILE *file, const char *sym) 564{ 565 struct rcs_sym *symp; 566 567 if (!rcs_sym_check(sym)) { 568 rcs_errno = RCS_ERR_BADSYM; 569 return (-1); 570 } 571 572 TAILQ_FOREACH(symp, &(file->rf_symbols), rs_list) 573 if (strcmp(symp->rs_name, sym) == 0) 574 break; 575 576 if (symp == NULL) { 577 rcs_errno = RCS_ERR_NOENT; 578 return (-1); 579 } 580 581 TAILQ_REMOVE(&(file->rf_symbols), symp, rs_list); 582 free(symp->rs_name); 583 rcsnum_free(symp->rs_num); 584 free(symp); 585 586 /* not synced anymore */ 587 file->rf_flags &= ~RCS_SYNCED; 588 return (0); 589} 590 591/* 592 * rcs_sym_getrev() 593 * 594 * Retrieve the RCS revision number associated with the symbol <sym> for the 595 * RCS file <file>. The returned value is a dynamically-allocated copy and 596 * should be freed by the caller once they are done with it. 597 * Returns the RCSNUM on success, or NULL on failure. 598 */ 599RCSNUM * 600rcs_sym_getrev(RCSFILE *file, const char *sym) 601{ 602 RCSNUM *num; 603 struct rcs_sym *symp; 604 605 if (!rcs_sym_check(sym)) { 606 rcs_errno = RCS_ERR_BADSYM; 607 return (NULL); 608 } 609 610 num = NULL; 611 TAILQ_FOREACH(symp, &(file->rf_symbols), rs_list) 612 if (strcmp(symp->rs_name, sym) == 0) 613 break; 614 615 if (symp == NULL) { 616 rcs_errno = RCS_ERR_NOENT; 617 } else { 618 num = rcsnum_alloc(); 619 rcsnum_cpy(symp->rs_num, num, 0); 620 } 621 622 return (num); 623} 624 625/* 626 * rcs_sym_check() 627 * 628 * Check the RCS symbol name <sym> for any unsupported characters. 629 * Returns 1 if the tag is correct, 0 if it isn't valid. 630 */ 631int 632rcs_sym_check(const char *sym) 633{ 634 int ret; 635 const unsigned char *cp; 636 637 ret = 1; 638 cp = sym; 639 if (!isalpha(*cp++)) 640 return (0); 641 642 for (; *cp != '\0'; cp++) 643 if (!isgraph(*cp) || (strchr(rcs_sym_invch, *cp) != NULL)) { 644 ret = 0; 645 break; 646 } 647 648 return (ret); 649} 650 651/* 652 * rcs_lock_getmode() 653 * 654 * Retrieve the locking mode of the RCS file <file>. 655 */ 656int 657rcs_lock_getmode(RCSFILE *file) 658{ 659 return (file->rf_flags & RCS_SLOCK) ? RCS_LOCK_STRICT : RCS_LOCK_LOOSE; 660} 661 662/* 663 * rcs_lock_setmode() 664 * 665 * Set the locking mode of the RCS file <file> to <mode>, which must either 666 * be RCS_LOCK_LOOSE or RCS_LOCK_STRICT. 667 * Returns the previous mode on success, or -1 on failure. 668 */ 669int 670rcs_lock_setmode(RCSFILE *file, int mode) 671{ 672 int pmode; 673 pmode = rcs_lock_getmode(file); 674 675 if (mode == RCS_LOCK_STRICT) 676 file->rf_flags |= RCS_SLOCK; 677 else if (mode == RCS_LOCK_LOOSE) 678 file->rf_flags &= ~RCS_SLOCK; 679 else 680 errx(1, "rcs_lock_setmode: invalid mode `%d'", mode); 681 682 file->rf_flags &= ~RCS_SYNCED; 683 return (pmode); 684} 685 686/* 687 * rcs_lock_add() 688 * 689 * Add an RCS lock for the user <user> on revision <rev>. 690 * Returns 0 on success, or -1 on failure. 691 */ 692int 693rcs_lock_add(RCSFILE *file, const char *user, RCSNUM *rev) 694{ 695 struct rcs_lock *lkp; 696 697 /* first look for duplication */ 698 TAILQ_FOREACH(lkp, &(file->rf_locks), rl_list) { 699 if (strcmp(lkp->rl_name, user) == 0 && 700 rcsnum_cmp(rev, lkp->rl_num, 0) == 0) { 701 rcs_errno = RCS_ERR_DUPENT; 702 return (-1); 703 } 704 } 705 706 lkp = xmalloc(sizeof(*lkp)); 707 lkp->rl_name = xstrdup(user); 708 lkp->rl_num = rcsnum_alloc(); 709 rcsnum_cpy(rev, lkp->rl_num, 0); 710 711 TAILQ_INSERT_TAIL(&(file->rf_locks), lkp, rl_list); 712 713 /* not synced anymore */ 714 file->rf_flags &= ~RCS_SYNCED; 715 return (0); 716} 717 718 719/* 720 * rcs_lock_remove() 721 * 722 * Remove the RCS lock on revision <rev>. 723 * Returns 0 on success, or -1 on failure. 724 */ 725int 726rcs_lock_remove(RCSFILE *file, const char *user, RCSNUM *rev) 727{ 728 struct rcs_lock *lkp; 729 730 TAILQ_FOREACH(lkp, &(file->rf_locks), rl_list) { 731 if (strcmp(lkp->rl_name, user) == 0 && 732 rcsnum_cmp(lkp->rl_num, rev, 0) == 0) 733 break; 734 } 735 736 if (lkp == NULL) { 737 rcs_errno = RCS_ERR_NOENT; 738 return (-1); 739 } 740 741 TAILQ_REMOVE(&(file->rf_locks), lkp, rl_list); 742 rcsnum_free(lkp->rl_num); 743 free(lkp->rl_name); 744 free(lkp); 745 746 /* not synced anymore */ 747 file->rf_flags &= ~RCS_SYNCED; 748 return (0); 749} 750 751/* 752 * rcs_desc_set() 753 * 754 * Set the description for the RCS file <file>. 755 */ 756void 757rcs_desc_set(RCSFILE *file, const char *desc) 758{ 759 char *tmp; 760 761 tmp = xstrdup(desc); 762 free(file->rf_desc); 763 file->rf_desc = tmp; 764 file->rf_flags &= ~RCS_SYNCED; 765} 766 767/* 768 * rcs_comment_set() 769 * 770 * Set the comment leader for the RCS file <file>. 771 */ 772void 773rcs_comment_set(RCSFILE *file, const char *comment) 774{ 775 char *tmp; 776 777 tmp = xstrdup(comment); 778 free(file->rf_comment); 779 file->rf_comment = tmp; 780 file->rf_flags &= ~RCS_SYNCED; 781} 782 783int 784rcs_patch_lines(struct rcs_lines *dlines, struct rcs_lines *plines) 785{ 786 char op, *ep; 787 struct rcs_line *lp, *dlp, *ndlp; 788 int i, lineno, nbln; 789 u_char tmp; 790 791 dlp = TAILQ_FIRST(&(dlines->l_lines)); 792 lp = TAILQ_FIRST(&(plines->l_lines)); 793 794 /* skip first bogus line */ 795 for (lp = TAILQ_NEXT(lp, l_list); lp != NULL; 796 lp = TAILQ_NEXT(lp, l_list)) { 797 if (lp->l_len < 2) 798 errx(1, "line too short, RCS patch seems broken"); 799 op = *(lp->l_line); 800 /* NUL-terminate line buffer for strtol() safety. */ 801 tmp = lp->l_line[lp->l_len - 1]; 802 lp->l_line[lp->l_len - 1] = '\0'; 803 lineno = (int)strtol((lp->l_line + 1), &ep, 10); 804 if (lineno > dlines->l_nblines || lineno < 0 || 805 *ep != ' ') 806 errx(1, "invalid line specification in RCS patch"); 807 ep++; 808 nbln = (int)strtol(ep, &ep, 10); 809 /* Restore the last byte of the buffer */ 810 lp->l_line[lp->l_len - 1] = tmp; 811 if (nbln < 0) 812 errx(1, 813 "invalid line number specification in RCS patch"); 814 815 /* find the appropriate line */ 816 for (;;) { 817 if (dlp == NULL) 818 break; 819 if (dlp->l_lineno == lineno) 820 break; 821 if (dlp->l_lineno > lineno) { 822 dlp = TAILQ_PREV(dlp, tqh, l_list); 823 } else if (dlp->l_lineno < lineno) { 824 if (((ndlp = TAILQ_NEXT(dlp, l_list)) == NULL) || 825 ndlp->l_lineno > lineno) 826 break; 827 dlp = ndlp; 828 } 829 } 830 if (dlp == NULL) 831 errx(1, "can't find referenced line in RCS patch"); 832 833 if (op == 'd') { 834 for (i = 0; (i < nbln) && (dlp != NULL); i++) { 835 ndlp = TAILQ_NEXT(dlp, l_list); 836 TAILQ_REMOVE(&(dlines->l_lines), dlp, l_list); 837 free(dlp); 838 dlp = ndlp; 839 /* last line is gone - reset dlp */ 840 if (dlp == NULL) { 841 ndlp = TAILQ_LAST(&(dlines->l_lines), 842 tqh); 843 dlp = ndlp; 844 } 845 } 846 } else if (op == 'a') { 847 for (i = 0; i < nbln; i++) { 848 ndlp = lp; 849 lp = TAILQ_NEXT(lp, l_list); 850 if (lp == NULL) 851 errx(1, "truncated RCS patch"); 852 TAILQ_REMOVE(&(plines->l_lines), lp, l_list); 853 TAILQ_INSERT_AFTER(&(dlines->l_lines), dlp, 854 lp, l_list); 855 dlp = lp; 856 857 /* we don't want lookup to block on those */ 858 lp->l_lineno = lineno; 859 860 lp = ndlp; 861 } 862 } else 863 errx(1, "unknown RCS patch operation `%c'", op); 864 865 /* last line of the patch, done */ 866 if (lp->l_lineno == plines->l_nblines) 867 break; 868 } 869 870 /* once we're done patching, rebuild the line numbers */ 871 lineno = 0; 872 TAILQ_FOREACH(lp, &(dlines->l_lines), l_list) 873 lp->l_lineno = lineno++; 874 dlines->l_nblines = lineno - 1; 875 876 return (0); 877} 878 879/* 880 * rcs_getrev() 881 * 882 * Get the whole contents of revision <rev> from the RCSFILE <rfp>. The 883 * returned buffer is dynamically allocated and should be released using 884 * buf_free() once the caller is done using it. 885 */ 886BUF * 887rcs_getrev(RCSFILE *rfp, RCSNUM *frev) 888{ 889 u_int i, numlen; 890 int isbranch, lookonbranch, found; 891 size_t dlen, plen, len; 892 RCSNUM *crev, *rev, *brev; 893 BUF *rbuf; 894 struct rcs_delta *rdp = NULL; 895 struct rcs_branch *rb; 896 u_char *data, *patch; 897 898 if (rfp->rf_head == NULL) 899 return (NULL); 900 901 if (frev == RCS_HEAD_REV) 902 rev = rfp->rf_head; 903 else 904 rev = frev; 905 906 /* XXX rcsnum_cmp() */ 907 for (i = 0; i < rfp->rf_head->rn_len; i++) { 908 if (rfp->rf_head->rn_id[i] < rev->rn_id[i]) { 909 rcs_errno = RCS_ERR_NOENT; 910 return (NULL); 911 } 912 } 913 914 /* No matter what, we'll need everything parsed up until the description 915 so go for it. */ 916 if (rcsparse_deltas(rfp, NULL)) 917 return (NULL); 918 919 rdp = rcs_findrev(rfp, rfp->rf_head); 920 if (rdp == NULL) { 921 warnx("failed to get RCS HEAD revision"); 922 return (NULL); 923 } 924 925 if (rdp->rd_tlen == 0) 926 if (rcsparse_deltatexts(rfp, rfp->rf_head)) 927 return (NULL); 928 929 len = rdp->rd_tlen; 930 if (len == 0) { 931 rbuf = buf_alloc(1); 932 buf_empty(rbuf); 933 return (rbuf); 934 } 935 936 rbuf = buf_alloc(len); 937 buf_append(rbuf, rdp->rd_text, len); 938 939 isbranch = 0; 940 brev = NULL; 941 942 /* 943 * If a branch was passed, get the latest revision on it. 944 */ 945 if (RCSNUM_ISBRANCH(rev)) { 946 brev = rev; 947 rdp = rcs_findrev(rfp, rev); 948 if (rdp == NULL) { 949 buf_free(rbuf); 950 return (NULL); 951 } 952 953 rev = rdp->rd_num; 954 } else { 955 if (RCSNUM_ISBRANCHREV(rev)) { 956 brev = rcsnum_revtobr(rev); 957 isbranch = 1; 958 } 959 } 960 961 lookonbranch = 0; 962 crev = NULL; 963 964 /* Apply patches backwards to get the right version. 965 */ 966 do { 967 found = 0; 968 969 if (rcsnum_cmp(rfp->rf_head, rev, 0) == 0) 970 break; 971 972 if (isbranch == 1 && rdp->rd_num->rn_len < rev->rn_len && 973 !TAILQ_EMPTY(&(rdp->rd_branches))) 974 lookonbranch = 1; 975 976 if (isbranch && lookonbranch == 1) { 977 lookonbranch = 0; 978 TAILQ_FOREACH(rb, &(rdp->rd_branches), rb_list) { 979 /* XXX rcsnum_cmp() is totally broken for 980 * this purpose. 981 */ 982 numlen = MINIMUM(brev->rn_len, 983 rb->rb_num->rn_len - 1); 984 for (i = 0; i < numlen; i++) { 985 if (rb->rb_num->rn_id[i] != 986 brev->rn_id[i]) 987 break; 988 } 989 990 if (i == numlen) { 991 crev = rb->rb_num; 992 found = 1; 993 break; 994 } 995 } 996 if (found == 0) 997 crev = rdp->rd_next; 998 } else { 999 crev = rdp->rd_next; 1000 } 1001 1002 rdp = rcs_findrev(rfp, crev); 1003 if (rdp == NULL) { 1004 buf_free(rbuf); 1005 return (NULL); 1006 } 1007 1008 plen = rdp->rd_tlen; 1009 dlen = buf_len(rbuf); 1010 patch = rdp->rd_text; 1011 data = buf_release(rbuf); 1012 /* check if we have parsed this rev's deltatext */ 1013 if (rdp->rd_tlen == 0) 1014 if (rcsparse_deltatexts(rfp, rdp->rd_num)) 1015 return (NULL); 1016 1017 rbuf = rcs_patchfile(data, dlen, patch, plen, rcs_patch_lines); 1018 free(data); 1019 1020 if (rbuf == NULL) 1021 break; 1022 } while (rcsnum_cmp(crev, rev, 0) != 0); 1023 1024 return (rbuf); 1025} 1026 1027void 1028rcs_delta_stats(struct rcs_delta *rdp, int *ladded, int *lremoved) 1029{ 1030 struct rcs_lines *plines; 1031 struct rcs_line *lp; 1032 int added, i, nbln, removed; 1033 char op, *ep; 1034 u_char tmp; 1035 1036 added = removed = 0; 1037 1038 plines = rcs_splitlines(rdp->rd_text, rdp->rd_tlen); 1039 lp = TAILQ_FIRST(&(plines->l_lines)); 1040 1041 /* skip first bogus line */ 1042 for (lp = TAILQ_NEXT(lp, l_list); lp != NULL; 1043 lp = TAILQ_NEXT(lp, l_list)) { 1044 if (lp->l_len < 2) 1045 errx(1, 1046 "line too short, RCS patch seems broken"); 1047 op = *(lp->l_line); 1048 /* NUL-terminate line buffer for strtol() safety. */ 1049 tmp = lp->l_line[lp->l_len - 1]; 1050 lp->l_line[lp->l_len - 1] = '\0'; 1051 (void)strtol((lp->l_line + 1), &ep, 10); 1052 ep++; 1053 nbln = (int)strtol(ep, &ep, 10); 1054 /* Restore the last byte of the buffer */ 1055 lp->l_line[lp->l_len - 1] = tmp; 1056 if (nbln < 0) 1057 errx(1, "invalid line number specification " 1058 "in RCS patch"); 1059 1060 if (op == 'a') { 1061 added += nbln; 1062 for (i = 0; i < nbln; i++) { 1063 lp = TAILQ_NEXT(lp, l_list); 1064 if (lp == NULL) 1065 errx(1, "truncated RCS patch"); 1066 } 1067 } else if (op == 'd') 1068 removed += nbln; 1069 else 1070 errx(1, "unknown RCS patch operation '%c'", op); 1071 } 1072 1073 rcs_freelines(plines); 1074 1075 *ladded = added; 1076 *lremoved = removed; 1077} 1078 1079/* 1080 * rcs_rev_add() 1081 * 1082 * Add a revision to the RCS file <rf>. The new revision's number can be 1083 * specified in <rev> (which can also be RCS_HEAD_REV, in which case the 1084 * new revision will have a number equal to the previous head revision plus 1085 * one). The <msg> argument specifies the log message for that revision, and 1086 * <date> specifies the revision's date (a value of -1 is 1087 * equivalent to using the current time). 1088 * If <author> is NULL, set the author for this revision to the current user. 1089 * Returns 0 on success, or -1 on failure. 1090 */ 1091int 1092rcs_rev_add(RCSFILE *rf, RCSNUM *rev, const char *msg, time_t date, 1093 const char *author) 1094{ 1095 time_t now; 1096 struct passwd *pw; 1097 struct rcs_delta *ordp, *rdp; 1098 1099 if (rev == RCS_HEAD_REV) { 1100 if (rf->rf_flags & RCS_CREATE) { 1101 if ((rev = rcsnum_parse(RCS_HEAD_INIT)) == NULL) 1102 return (-1); 1103 rf->rf_head = rev; 1104 } else { 1105 rev = rcsnum_inc(rf->rf_head); 1106 } 1107 } else { 1108 if ((rdp = rcs_findrev(rf, rev)) != NULL) { 1109 rcs_errno = RCS_ERR_DUPENT; 1110 return (-1); 1111 } 1112 } 1113 1114 rdp = xcalloc(1, sizeof(*rdp)); 1115 1116 TAILQ_INIT(&(rdp->rd_branches)); 1117 1118 rdp->rd_num = rcsnum_alloc(); 1119 rcsnum_cpy(rev, rdp->rd_num, 0); 1120 1121 rdp->rd_next = rcsnum_alloc(); 1122 1123 if (!(rf->rf_flags & RCS_CREATE)) { 1124 /* next should point to the previous HEAD */ 1125 ordp = TAILQ_FIRST(&(rf->rf_delta)); 1126 rcsnum_cpy(ordp->rd_num, rdp->rd_next, 0); 1127 } 1128 1129 if (!author && !(author = getlogin())) { 1130 if (!(pw = getpwuid(getuid()))) 1131 errx(1, "getpwuid failed"); 1132 author = pw->pw_name; 1133 } 1134 rdp->rd_author = xstrdup(author); 1135 rdp->rd_state = xstrdup(RCS_STATE_EXP); 1136 rdp->rd_log = xstrdup(msg); 1137 1138 if (date != (time_t)(-1)) 1139 now = date; 1140 else 1141 time(&now); 1142 gmtime_r(&now, &(rdp->rd_date)); 1143 1144 TAILQ_INSERT_HEAD(&(rf->rf_delta), rdp, rd_list); 1145 rf->rf_ndelta++; 1146 1147 /* not synced anymore */ 1148 rf->rf_flags &= ~RCS_SYNCED; 1149 1150 return (0); 1151} 1152 1153/* 1154 * rcs_rev_remove() 1155 * 1156 * Remove the revision whose number is <rev> from the RCS file <rf>. 1157 */ 1158int 1159rcs_rev_remove(RCSFILE *rf, RCSNUM *rev) 1160{ 1161 char *path_tmp1, *path_tmp2; 1162 struct rcs_delta *rdp, *prevrdp, *nextrdp; 1163 BUF *newdeltatext, *nextbuf, *prevbuf, *newdiff; 1164 1165 nextrdp = prevrdp = NULL; 1166 path_tmp1 = path_tmp2 = NULL; 1167 1168 if (rev == RCS_HEAD_REV) 1169 rev = rf->rf_head; 1170 1171 /* do we actually have that revision? */ 1172 if ((rdp = rcs_findrev(rf, rev)) == NULL) { 1173 rcs_errno = RCS_ERR_NOENT; 1174 return (-1); 1175 } 1176 1177 /* 1178 * This is confusing, the previous delta is next in the TAILQ list. 1179 * the next delta is the previous one in the TAILQ list. 1180 * 1181 * When the HEAD revision got specified, nextrdp will be NULL. 1182 * When the first revision got specified, prevrdp will be NULL. 1183 */ 1184 prevrdp = (struct rcs_delta *)TAILQ_NEXT(rdp, rd_list); 1185 nextrdp = (struct rcs_delta *)TAILQ_PREV(rdp, tqh, rd_list); 1186 1187 newdeltatext = prevbuf = nextbuf = NULL; 1188 1189 if (prevrdp != NULL) { 1190 if ((prevbuf = rcs_getrev(rf, prevrdp->rd_num)) == NULL) 1191 errx(1, "error getting revision"); 1192 } 1193 1194 if (prevrdp != NULL && nextrdp != NULL) { 1195 if ((nextbuf = rcs_getrev(rf, nextrdp->rd_num)) == NULL) 1196 errx(1, "error getting revision"); 1197 1198 newdiff = buf_alloc(64); 1199 1200 /* calculate new diff */ 1201 (void)xasprintf(&path_tmp1, "%s/diff1.XXXXXXXXXX", rcs_tmpdir); 1202 buf_write_stmp(nextbuf, path_tmp1); 1203 buf_free(nextbuf); 1204 1205 (void)xasprintf(&path_tmp2, "%s/diff2.XXXXXXXXXX", rcs_tmpdir); 1206 buf_write_stmp(prevbuf, path_tmp2); 1207 buf_free(prevbuf); 1208 1209 diff_format = D_RCSDIFF; 1210 if (diffreg(path_tmp1, path_tmp2, newdiff, D_FORCEASCII) == D_ERROR) 1211 errx(1, "diffreg failed"); 1212 1213 newdeltatext = newdiff; 1214 } else if (nextrdp == NULL && prevrdp != NULL) { 1215 newdeltatext = prevbuf; 1216 } 1217 1218 if (newdeltatext != NULL) { 1219 if (rcs_deltatext_set(rf, prevrdp->rd_num, newdeltatext) < 0) 1220 errx(1, "error setting new deltatext"); 1221 } 1222 1223 TAILQ_REMOVE(&(rf->rf_delta), rdp, rd_list); 1224 1225 /* update pointers */ 1226 if (prevrdp != NULL && nextrdp != NULL) { 1227 rcsnum_cpy(prevrdp->rd_num, nextrdp->rd_next, 0); 1228 } else if (prevrdp != NULL) { 1229 if (rcs_head_set(rf, prevrdp->rd_num) < 0) 1230 errx(1, "rcs_head_set failed"); 1231 } else if (nextrdp != NULL) { 1232 rcsnum_free(nextrdp->rd_next); 1233 nextrdp->rd_next = rcsnum_alloc(); 1234 } else { 1235 rcsnum_free(rf->rf_head); 1236 rf->rf_head = NULL; 1237 } 1238 1239 rf->rf_ndelta--; 1240 rf->rf_flags &= ~RCS_SYNCED; 1241 1242 rcs_freedelta(rdp); 1243 1244 free(path_tmp1); 1245 free(path_tmp2); 1246 1247 return (0); 1248} 1249 1250/* 1251 * rcs_findrev() 1252 * 1253 * Find a specific revision's delta entry in the tree of the RCS file <rfp>. 1254 * The revision number is given in <rev>. 1255 * 1256 * If the given revision is a branch number, we translate it into the latest 1257 * revision on the branch. 1258 * 1259 * Returns a pointer to the delta on success, or NULL on failure. 1260 */ 1261struct rcs_delta * 1262rcs_findrev(RCSFILE *rfp, RCSNUM *rev) 1263{ 1264 u_int cmplen; 1265 struct rcs_delta *rdp; 1266 RCSNUM *brev, *frev; 1267 1268 /* 1269 * We need to do more parsing if the last revision in the linked list 1270 * is greater than the requested revision. 1271 */ 1272 rdp = TAILQ_LAST(&(rfp->rf_delta), rcs_dlist); 1273 if (rdp == NULL || 1274 rcsnum_cmp(rdp->rd_num, rev, 0) == -1) { 1275 if (rcsparse_deltas(rfp, rev)) 1276 return (NULL); 1277 } 1278 1279 /* 1280 * Translate a branch into the latest revision on the branch itself. 1281 */ 1282 if (RCSNUM_ISBRANCH(rev)) { 1283 brev = rcsnum_brtorev(rev); 1284 frev = brev; 1285 for (;;) { 1286 rdp = rcs_findrev(rfp, frev); 1287 if (rdp == NULL) 1288 return (NULL); 1289 1290 if (rdp->rd_next->rn_len == 0) 1291 break; 1292 1293 frev = rdp->rd_next; 1294 } 1295 1296 rcsnum_free(brev); 1297 return (rdp); 1298 } 1299 1300 cmplen = rev->rn_len; 1301 1302 TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) { 1303 if (rcsnum_cmp(rdp->rd_num, rev, cmplen) == 0) 1304 return (rdp); 1305 } 1306 1307 return (NULL); 1308} 1309 1310/* 1311 * rcs_kwexp_set() 1312 * 1313 * Set the keyword expansion mode to use on the RCS file <file> to <mode>. 1314 */ 1315void 1316rcs_kwexp_set(RCSFILE *file, int mode) 1317{ 1318 int i; 1319 char *tmp, buf[8] = ""; 1320 1321 if (RCS_KWEXP_INVAL(mode)) 1322 return; 1323 1324 i = 0; 1325 if (mode == RCS_KWEXP_NONE) 1326 buf[0] = 'b'; 1327 else if (mode == RCS_KWEXP_OLD) 1328 buf[0] = 'o'; 1329 else { 1330 if (mode & RCS_KWEXP_NAME) 1331 buf[i++] = 'k'; 1332 if (mode & RCS_KWEXP_VAL) 1333 buf[i++] = 'v'; 1334 if (mode & RCS_KWEXP_LKR) 1335 buf[i++] = 'l'; 1336 } 1337 1338 tmp = xstrdup(buf); 1339 free(file->rf_expand); 1340 file->rf_expand = tmp; 1341 /* not synced anymore */ 1342 file->rf_flags &= ~RCS_SYNCED; 1343} 1344 1345/* 1346 * rcs_kwexp_get() 1347 * 1348 * Retrieve the keyword expansion mode to be used for the RCS file <file>. 1349 */ 1350int 1351rcs_kwexp_get(RCSFILE *file) 1352{ 1353 if (file->rf_expand == NULL) 1354 return (RCS_KWEXP_DEFAULT); 1355 1356 return (rcs_kflag_get(file->rf_expand)); 1357} 1358 1359/* 1360 * rcs_kflag_get() 1361 * 1362 * Get the keyword expansion mode from a set of character flags given in 1363 * <flags> and return the appropriate flag mask. In case of an error, the 1364 * returned mask will have the RCS_KWEXP_ERR bit set to 1. 1365 */ 1366int 1367rcs_kflag_get(const char *flags) 1368{ 1369 int fl; 1370 size_t len; 1371 const char *fp; 1372 1373 if (flags == NULL || !(len = strlen(flags))) 1374 return (RCS_KWEXP_ERR); 1375 1376 fl = 0; 1377 for (fp = flags; *fp != '\0'; fp++) { 1378 if (*fp == 'k') 1379 fl |= RCS_KWEXP_NAME; 1380 else if (*fp == 'v') 1381 fl |= RCS_KWEXP_VAL; 1382 else if (*fp == 'l') 1383 fl |= RCS_KWEXP_LKR; 1384 else if (*fp == 'o') { 1385 if (len != 1) 1386 fl |= RCS_KWEXP_ERR; 1387 fl |= RCS_KWEXP_OLD; 1388 } else if (*fp == 'b') { 1389 if (len != 1) 1390 fl |= RCS_KWEXP_ERR; 1391 fl |= RCS_KWEXP_NONE; 1392 } else /* unknown letter */ 1393 fl |= RCS_KWEXP_ERR; 1394 } 1395 1396 return (fl); 1397} 1398 1399/* 1400 * rcs_freedelta() 1401 * 1402 * Free the contents of a delta structure. 1403 */ 1404static void 1405rcs_freedelta(struct rcs_delta *rdp) 1406{ 1407 struct rcs_branch *rb; 1408 1409 if (rdp->rd_num != NULL) 1410 rcsnum_free(rdp->rd_num); 1411 if (rdp->rd_next != NULL) 1412 rcsnum_free(rdp->rd_next); 1413 1414 free(rdp->rd_author); 1415 free(rdp->rd_locker); 1416 free(rdp->rd_state); 1417 free(rdp->rd_log); 1418 free(rdp->rd_text); 1419 1420 while ((rb = TAILQ_FIRST(&(rdp->rd_branches))) != NULL) { 1421 TAILQ_REMOVE(&(rdp->rd_branches), rb, rb_list); 1422 rcsnum_free(rb->rb_num); 1423 free(rb); 1424 } 1425 1426 free(rdp); 1427} 1428 1429/* 1430 * rcs_strprint() 1431 * 1432 * Output an RCS string <str> of size <slen> to the stream <stream>. Any 1433 * '@' characters are escaped. Otherwise, the string can contain arbitrary 1434 * binary data. 1435 */ 1436static void 1437rcs_strprint(const u_char *str, size_t slen, FILE *stream) 1438{ 1439 const u_char *ap, *ep, *sp; 1440 1441 if (slen == 0) 1442 return; 1443 1444 ep = str + slen - 1; 1445 1446 for (sp = str; sp <= ep;) { 1447 ap = memchr(sp, '@', ep - sp); 1448 if (ap == NULL) 1449 ap = ep; 1450 (void)fwrite(sp, sizeof(u_char), ap - sp + 1, stream); 1451 1452 if (*ap == '@') 1453 putc('@', stream); 1454 sp = ap + 1; 1455 } 1456} 1457 1458/* 1459 * rcs_expand_keywords() 1460 * 1461 * Return expansion any RCS keywords in <data> 1462 * 1463 * On error, return NULL. 1464 */ 1465static BUF * 1466rcs_expand_keywords(char *rcsfile_in, struct rcs_delta *rdp, BUF *bp, int mode) 1467{ 1468 BUF *newbuf; 1469 u_char *c, *kw, *fin; 1470 char buf[256], *tmpf, resolved[PATH_MAX], *rcsfile; 1471 u_char *line, *line2; 1472 u_int i, j; 1473 int kwtype; 1474 int found; 1475 struct tm tb; 1476 1477 tb = rdp->rd_date; 1478 if (timezone_flag != NULL) 1479 rcs_set_tz(timezone_flag, rdp, &tb); 1480 1481 if (realpath(rcsfile_in, resolved) == NULL) 1482 rcsfile = rcsfile_in; 1483 else 1484 rcsfile = resolved; 1485 1486 newbuf = buf_alloc(buf_len(bp)); 1487 1488 /* 1489 * Keyword formats: 1490 * $Keyword$ 1491 * $Keyword: value$ 1492 */ 1493 c = buf_get(bp); 1494 fin = c + buf_len(bp); 1495 /* Copying to newbuf is deferred until the first keyword. */ 1496 found = 0; 1497 1498 while (c < fin) { 1499 kw = memchr(c, '$', fin - c); 1500 if (kw == NULL) 1501 break; 1502 ++kw; 1503 if (found) { 1504 /* Copy everything up to and including the $. */ 1505 buf_append(newbuf, c, kw - c); 1506 } 1507 c = kw; 1508 /* c points after the $ now. */ 1509 if (c == fin) 1510 break; 1511 if (!isalpha(*c)) /* all valid keywords start with a letter */ 1512 continue; 1513 1514 for (i = 0; i < RCS_NKWORDS; ++i) { 1515 size_t kwlen; 1516 1517 kwlen = strlen(rcs_expkw[i].kw_str); 1518 /* 1519 * kwlen must be less than clen since clen includes 1520 * either a terminating `$' or a `:'. 1521 */ 1522 if (c + kwlen < fin && 1523 memcmp(c , rcs_expkw[i].kw_str, kwlen) == 0 && 1524 (c[kwlen] == '$' || c[kwlen] == ':')) { 1525 c += kwlen; 1526 break; 1527 } 1528 } 1529 if (i == RCS_NKWORDS) 1530 continue; 1531 kwtype = rcs_expkw[i].kw_type; 1532 1533 /* 1534 * If the next character is ':' we need to look for an '$' 1535 * before the end of the line to be sure it is in fact a 1536 * keyword. 1537 */ 1538 if (*c == ':') { 1539 for (; c < fin; ++c) { 1540 if (*c == '$' || *c == '\n') 1541 break; 1542 } 1543 1544 if (*c != '$') { 1545 if (found) 1546 buf_append(newbuf, kw, c - kw); 1547 continue; 1548 } 1549 } 1550 ++c; 1551 1552 if (!found) { 1553 found = 1; 1554 /* Copy everything up to and including the $. */ 1555 buf_append(newbuf, buf_get(bp), kw - buf_get(bp)); 1556 } 1557 1558 if (mode & RCS_KWEXP_NAME) { 1559 buf_puts(newbuf, rcs_expkw[i].kw_str); 1560 if (mode & RCS_KWEXP_VAL) 1561 buf_puts(newbuf, ": "); 1562 } 1563 1564 /* Order matters because of RCS_KW_ID and RCS_KW_HEADER. */ 1565 if (mode & RCS_KWEXP_VAL) { 1566 if (kwtype & (RCS_KW_RCSFILE|RCS_KW_LOG)) { 1567 if ((kwtype & RCS_KW_FULLPATH) || 1568 (tmpf = strrchr(rcsfile, '/')) == NULL) 1569 buf_puts(newbuf, rcsfile); 1570 else 1571 buf_puts(newbuf, tmpf + 1); 1572 buf_putc(newbuf, ' '); 1573 } 1574 1575 if (kwtype & RCS_KW_REVISION) { 1576 rcsnum_tostr(rdp->rd_num, buf, sizeof(buf)); 1577 buf_puts(newbuf, buf); 1578 buf_putc(newbuf, ' '); 1579 } 1580 1581 if (kwtype & RCS_KW_DATE) { 1582 strftime(buf, sizeof(buf), 1583 "%Y/%m/%d %H:%M:%S ", &tb); 1584 buf_puts(newbuf, buf); 1585 } 1586 1587 if (kwtype & RCS_KW_AUTHOR) { 1588 buf_puts(newbuf, rdp->rd_author); 1589 buf_putc(newbuf, ' '); 1590 } 1591 1592 if (kwtype & RCS_KW_STATE) { 1593 buf_puts(newbuf, rdp->rd_state); 1594 buf_putc(newbuf, ' '); 1595 } 1596 1597 /* Order does not matter anymore below. */ 1598 if (kwtype & RCS_KW_SOURCE) { 1599 buf_puts(newbuf, rcsfile); 1600 buf_putc(newbuf, ' '); 1601 } 1602 1603 if (kwtype & RCS_KW_NAME) 1604 buf_putc(newbuf, ' '); 1605 1606 if ((kwtype & RCS_KW_LOCKER)) { 1607 if (rdp->rd_locker) { 1608 buf_puts(newbuf, rdp->rd_locker); 1609 buf_putc(newbuf, ' '); 1610 } 1611 } 1612 } 1613 1614 /* End the expansion. */ 1615 if (mode & RCS_KWEXP_NAME) 1616 buf_putc(newbuf, '$'); 1617 1618 if (kwtype & RCS_KW_LOG) { 1619 line = memrchr(buf_get(bp), '\n', kw - buf_get(bp) - 1); 1620 if (line == NULL) 1621 line = buf_get(bp); 1622 else 1623 ++line; 1624 line2 = kw - 1; 1625 while (line2 > line && line2[-1] == ' ') 1626 --line2; 1627 1628 buf_putc(newbuf, '\n'); 1629 buf_append(newbuf, line, kw - 1 - line); 1630 buf_puts(newbuf, "Revision "); 1631 rcsnum_tostr(rdp->rd_num, buf, sizeof(buf)); 1632 buf_puts(newbuf, buf); 1633 buf_puts(newbuf, " "); 1634 strftime(buf, sizeof(buf), "%Y/%m/%d %H:%M:%S", &tb); 1635 buf_puts(newbuf, buf); 1636 1637 buf_puts(newbuf, " "); 1638 buf_puts(newbuf, rdp->rd_author); 1639 buf_putc(newbuf, '\n'); 1640 1641 for (i = 0; rdp->rd_log[i]; i += j) { 1642 j = strcspn(rdp->rd_log + i, "\n"); 1643 if (j == 0) 1644 buf_append(newbuf, line, line2 - line); 1645 else 1646 buf_append(newbuf, line, kw - 1 - line); 1647 if (rdp->rd_log[i + j]) 1648 ++j; 1649 buf_append(newbuf, rdp->rd_log + i, j); 1650 } 1651 buf_append(newbuf, line, line2 - line); 1652 for (j = 0; c + j < fin; ++j) { 1653 if (c[j] != ' ') 1654 break; 1655 } 1656 if (c + j == fin || c[j] == '\n') 1657 c += j; 1658 } 1659 } 1660 1661 if (found) { 1662 buf_append(newbuf, c, fin - c); 1663 buf_free(bp); 1664 return (newbuf); 1665 } else { 1666 buf_free(newbuf); 1667 return (bp); 1668 } 1669} 1670 1671/* 1672 * rcs_deltatext_set() 1673 * 1674 * Set deltatext for <rev> in RCS file <rfp> to <dtext> 1675 * Returns -1 on error, 0 on success. 1676 */ 1677int 1678rcs_deltatext_set(RCSFILE *rfp, RCSNUM *rev, BUF *bp) 1679{ 1680 size_t len; 1681 u_char *dtext; 1682 struct rcs_delta *rdp; 1683 1684 /* Write operations require full parsing */ 1685 if (rcsparse_deltatexts(rfp, NULL)) 1686 return (-1); 1687 1688 if ((rdp = rcs_findrev(rfp, rev)) == NULL) 1689 return (-1); 1690 1691 free(rdp->rd_text); 1692 1693 len = buf_len(bp); 1694 dtext = buf_release(bp); 1695 bp = NULL; 1696 1697 if (len != 0) { 1698 rdp->rd_text = xmalloc(len); 1699 rdp->rd_tlen = len; 1700 (void)memcpy(rdp->rd_text, dtext, len); 1701 } else { 1702 rdp->rd_text = NULL; 1703 rdp->rd_tlen = 0; 1704 } 1705 1706 free(dtext); 1707 1708 return (0); 1709} 1710 1711/* 1712 * rcs_rev_setlog() 1713 * 1714 * Sets the log message of revision <rev> to <logtext>. 1715 */ 1716int 1717rcs_rev_setlog(RCSFILE *rfp, RCSNUM *rev, const char *logtext) 1718{ 1719 struct rcs_delta *rdp; 1720 1721 if ((rdp = rcs_findrev(rfp, rev)) == NULL) 1722 return (-1); 1723 1724 free(rdp->rd_log); 1725 1726 rdp->rd_log = xstrdup(logtext); 1727 rfp->rf_flags &= ~RCS_SYNCED; 1728 return (0); 1729} 1730/* 1731 * rcs_rev_getdate() 1732 * 1733 * Get the date corresponding to a given revision. 1734 * Returns the date on success, -1 on failure. 1735 */ 1736time_t 1737rcs_rev_getdate(RCSFILE *rfp, RCSNUM *rev) 1738{ 1739 struct rcs_delta *rdp; 1740 1741 if ((rdp = rcs_findrev(rfp, rev)) == NULL) 1742 return (-1); 1743 1744 return (mktime(&rdp->rd_date)); 1745} 1746 1747/* 1748 * rcs_state_set() 1749 * 1750 * Sets the state of revision <rev> to <state> 1751 * NOTE: default state is 'Exp'. States may not contain spaces. 1752 * 1753 * Returns -1 on failure, 0 on success. 1754 */ 1755int 1756rcs_state_set(RCSFILE *rfp, RCSNUM *rev, const char *state) 1757{ 1758 struct rcs_delta *rdp; 1759 1760 if ((rdp = rcs_findrev(rfp, rev)) == NULL) 1761 return (-1); 1762 1763 free(rdp->rd_state); 1764 1765 rdp->rd_state = xstrdup(state); 1766 1767 rfp->rf_flags &= ~RCS_SYNCED; 1768 1769 return (0); 1770} 1771 1772/* 1773 * rcs_state_check() 1774 * 1775 * Check if string <state> is valid. 1776 * 1777 * Returns 0 if the string is valid, -1 otherwise. 1778 */ 1779int 1780rcs_state_check(const char *state) 1781{ 1782 int ret; 1783 const unsigned char *cp; 1784 1785 ret = 0; 1786 cp = state; 1787 if (!isalpha(*cp++)) 1788 return (-1); 1789 1790 for (; *cp != '\0'; cp++) 1791 if (!isgraph(*cp) || (strchr(rcs_state_invch, *cp) != NULL)) { 1792 ret = -1; 1793 break; 1794 } 1795 1796 return (ret); 1797} 1798 1799/* 1800 * rcs_kwexp_buf() 1801 * 1802 * Do keyword expansion on a buffer if necessary 1803 * 1804 */ 1805BUF * 1806rcs_kwexp_buf(BUF *bp, RCSFILE *rf, RCSNUM *rev) 1807{ 1808 struct rcs_delta *rdp; 1809 int expmode; 1810 1811 /* 1812 * Do keyword expansion if required. 1813 */ 1814 expmode = rcs_kwexp_get(rf); 1815 1816 if (!(expmode & RCS_KWEXP_NONE)) { 1817 if ((rdp = rcs_findrev(rf, rev)) == NULL) 1818 errx(1, "could not fetch revision"); 1819 return (rcs_expand_keywords(rf->rf_path, rdp, bp, expmode)); 1820 } 1821 return (bp); 1822} 1823