1/* $NetBSD$ */ 2 3/*- 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32/*- 33 * Copyright (c) 2001-2004 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Luke Mewburn of Wasabi Systems. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 49 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 50 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 51 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 52 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 53 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 54 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 55 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 56 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 57 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 58 * POSSIBILITY OF SUCH DAMAGE. 59 */ 60 61#if HAVE_NBTOOL_CONFIG_H 62#include "nbtool_config.h" 63#endif 64 65#include <sys/cdefs.h> 66#if defined(__RCSID) && !defined(lint) 67#if 0 68static char sccsid[] = "@(#)spec.c 8.2 (Berkeley) 4/28/95"; 69#else 70__RCSID("$NetBSD$"); 71#endif 72#endif /* not lint */ 73 74#include <sys/param.h> 75#include <sys/stat.h> 76 77#include <assert.h> 78#include <ctype.h> 79#include <errno.h> 80#include <grp.h> 81#include <pwd.h> 82#include <stdarg.h> 83#include <stdio.h> 84#include <stdlib.h> 85#include <string.h> 86#include <unistd.h> 87#include <vis.h> 88#include <util.h> 89 90#include "extern.h" 91#include "pack_dev.h" 92 93size_t mtree_lineno; /* Current spec line number */ 94int mtree_Mflag; /* Merge duplicate entries */ 95int mtree_Wflag; /* Don't "whack" permissions */ 96int mtree_Sflag; /* Sort entries */ 97 98static dev_t parsedev(char *); 99static void replacenode(NODE *, NODE *); 100static void set(char *, NODE *); 101static void unset(char *, NODE *); 102static void addchild(NODE *, NODE *); 103static int nodecmp(const NODE *, const NODE *); 104static int appendfield(int, const char *, ...); 105 106#define REPLACEPTR(x,v) do { if ((x)) free((x)); (x) = (v); } while (0) 107 108NODE * 109spec(FILE *fp) 110{ 111 NODE *centry, *last, *pathparent, *cur; 112 char *p, *e, *next; 113 NODE ginfo, *root; 114 char *buf, *tname, *ntname; 115 size_t tnamelen, plen; 116 117 root = NULL; 118 centry = last = NULL; 119 tname = NULL; 120 tnamelen = 0; 121 memset(&ginfo, 0, sizeof(ginfo)); 122 for (mtree_lineno = 0; 123 (buf = fparseln(fp, NULL, &mtree_lineno, NULL, 124 FPARSELN_UNESCCOMM)); 125 free(buf)) { 126 /* Skip leading whitespace. */ 127 for (p = buf; *p && isspace((unsigned char)*p); ++p) 128 continue; 129 130 /* If nothing but whitespace, continue. */ 131 if (!*p) 132 continue; 133 134#ifdef DEBUG 135 fprintf(stderr, "line %lu: {%s}\n", 136 (u_long)mtree_lineno, p); 137#endif 138 /* Grab file name, "$", "set", or "unset". */ 139 next = buf; 140 while ((p = strsep(&next, " \t")) != NULL && *p == '\0') 141 continue; 142 if (p == NULL) 143 mtree_err("missing field"); 144 145 if (p[0] == '/') { 146 if (strcmp(p + 1, "set") == 0) 147 set(next, &ginfo); 148 else if (strcmp(p + 1, "unset") == 0) 149 unset(next, &ginfo); 150 else 151 mtree_err("invalid specification `%s'", p); 152 continue; 153 } 154 155 if (strcmp(p, "..") == 0) { 156 /* Don't go up, if haven't gone down. */ 157 if (root == NULL) 158 goto noparent; 159 if (last->type != F_DIR || last->flags & F_DONE) { 160 if (last == root) 161 goto noparent; 162 last = last->parent; 163 } 164 last->flags |= F_DONE; 165 continue; 166 167noparent: mtree_err("no parent node"); 168 } 169 170 plen = strlen(p) + 1; 171 if (plen > tnamelen) { 172 if ((ntname = realloc(tname, plen)) == NULL) 173 mtree_err("realloc: %s", strerror(errno)); 174 tname = ntname; 175 tnamelen = plen; 176 } 177 if (strunvis(tname, p) == -1) 178 mtree_err("strunvis failed on `%s'", p); 179 p = tname; 180 181 pathparent = NULL; 182 if (strchr(p, '/') != NULL) { 183 cur = root; 184 for (; (e = strchr(p, '/')) != NULL; p = e+1) { 185 if (p == e) 186 continue; /* handle // */ 187 *e = '\0'; 188 if (strcmp(p, ".") != 0) { 189 while (cur && 190 strcmp(cur->name, p) != 0) { 191 cur = cur->next; 192 } 193 } 194 if (cur == NULL || cur->type != F_DIR) { 195 mtree_err("%s: %s", tname, 196 "missing directory in specification"); 197 } 198 *e = '/'; 199 pathparent = cur; 200 cur = cur->child; 201 } 202 if (*p == '\0') 203 mtree_err("%s: empty leaf element", tname); 204 } 205 206 if ((centry = calloc(1, sizeof(NODE) + strlen(p))) == NULL) 207 mtree_err("%s", strerror(errno)); 208 *centry = ginfo; 209 centry->lineno = mtree_lineno; 210 strcpy(centry->name, p); 211#define MAGIC "?*[" 212 if (strpbrk(p, MAGIC)) 213 centry->flags |= F_MAGIC; 214 set(next, centry); 215 216 if (root == NULL) { 217 /* 218 * empty tree 219 */ 220 if (strcmp(centry->name, ".") != 0 || 221 centry->type != F_DIR) 222 mtree_err( 223 "root node must be the directory `.'"); 224 last = root = centry; 225 root->parent = root; 226 } else if (pathparent != NULL) { 227 /* 228 * full path entry; add or replace 229 */ 230 centry->parent = pathparent; 231 addchild(pathparent, centry); 232 last = centry; 233 } else if (strcmp(centry->name, ".") == 0) { 234 /* 235 * duplicate "." entry; always replace 236 */ 237 replacenode(root, centry); 238 } else if (last->type == F_DIR && !(last->flags & F_DONE)) { 239 /* 240 * new relative child in current dir; 241 * add or replace 242 */ 243 centry->parent = last; 244 addchild(last, centry); 245 last = centry; 246 } else { 247 /* 248 * new relative child in parent dir 249 * (after encountering ".." entry); 250 * add or replace 251 */ 252 centry->parent = last->parent; 253 addchild(last->parent, centry); 254 last = centry; 255 } 256 } 257 return (root); 258} 259 260void 261free_nodes(NODE *root) 262{ 263 NODE *cur, *next; 264 265 if (root == NULL) 266 return; 267 268 next = NULL; 269 for (cur = root; cur != NULL; cur = next) { 270 next = cur->next; 271 free_nodes(cur->child); 272 REPLACEPTR(cur->slink, NULL); 273 REPLACEPTR(cur->md5digest, NULL); 274 REPLACEPTR(cur->rmd160digest, NULL); 275 REPLACEPTR(cur->sha1digest, NULL); 276 REPLACEPTR(cur->sha256digest, NULL); 277 REPLACEPTR(cur->sha384digest, NULL); 278 REPLACEPTR(cur->sha512digest, NULL); 279 REPLACEPTR(cur->tags, NULL); 280 REPLACEPTR(cur, NULL); 281 } 282} 283 284/* 285 * appendfield -- 286 * Like printf(), but output a space either before or after 287 * the regular output, according to the pathlast flag. 288 */ 289static int 290appendfield(int pathlast, const char *fmt, ...) 291{ 292 va_list ap; 293 int result; 294 295 va_start(ap, fmt); 296 if (!pathlast) 297 printf(" "); 298 result = vprintf(fmt, ap); 299 if (pathlast) 300 printf(" "); 301 va_end(ap); 302 return result; 303} 304 305/* 306 * dump_nodes -- 307 * dump the NODEs from `cur', based in the directory `dir'. 308 * if pathlast is none zero, print the path last, otherwise print 309 * it first. 310 */ 311void 312dump_nodes(const char *dir, NODE *root, int pathlast) 313{ 314 NODE *cur; 315 char path[MAXPATHLEN]; 316 const char *name; 317 char *str; 318 char *p, *q; 319 320 for (cur = root; cur != NULL; cur = cur->next) { 321 if (cur->type != F_DIR && !matchtags(cur)) 322 continue; 323 324 if (snprintf(path, sizeof(path), "%s%s%s", 325 dir, *dir ? "/" : "", cur->name) 326 >= (int)sizeof(path)) 327 mtree_err("Pathname too long."); 328 329 if (!pathlast) 330 printf("%s", vispath(path)); 331 332#define MATCHFLAG(f) ((keys & (f)) && (cur->flags & (f))) 333 if (MATCHFLAG(F_TYPE)) 334 appendfield(pathlast, "type=%s", nodetype(cur->type)); 335 if (MATCHFLAG(F_UID | F_UNAME)) { 336 if (keys & F_UNAME && 337 (name = user_from_uid(cur->st_uid, 1)) != NULL) 338 appendfield(pathlast, "uname=%s", name); 339 else 340 appendfield(pathlast, "uid=%u", cur->st_uid); 341 } 342 if (MATCHFLAG(F_GID | F_GNAME)) { 343 if (keys & F_GNAME && 344 (name = group_from_gid(cur->st_gid, 1)) != NULL) 345 appendfield(pathlast, "gname=%s", name); 346 else 347 appendfield(pathlast, "gid=%u", cur->st_gid); 348 } 349 if (MATCHFLAG(F_MODE)) 350 appendfield(pathlast, "mode=%#o", cur->st_mode); 351 if (MATCHFLAG(F_DEV) && 352 (cur->type == F_BLOCK || cur->type == F_CHAR)) 353 appendfield(pathlast, "device=%#llx", (long long)cur->st_rdev); 354 if (MATCHFLAG(F_NLINK)) 355 appendfield(pathlast, "nlink=%d", cur->st_nlink); 356 if (MATCHFLAG(F_SLINK)) 357 appendfield(pathlast, "link=%s", vispath(cur->slink)); 358 if (MATCHFLAG(F_SIZE)) 359 appendfield(pathlast, "size=%lld", (long long)cur->st_size); 360 if (MATCHFLAG(F_TIME)) 361 appendfield(pathlast, "time=%lld.%ld", 362 (long long)cur->st_mtimespec.tv_sec, 363 cur->st_mtimespec.tv_nsec); 364 if (MATCHFLAG(F_CKSUM)) 365 appendfield(pathlast, "cksum=%lu", cur->cksum); 366 if (MATCHFLAG(F_MD5)) 367 appendfield(pathlast, "md5=%s", cur->md5digest); 368 if (MATCHFLAG(F_RMD160)) 369 appendfield(pathlast, "rmd160=%s", cur->rmd160digest); 370 if (MATCHFLAG(F_SHA1)) 371 appendfield(pathlast, "sha1=%s", cur->sha1digest); 372 if (MATCHFLAG(F_SHA256)) 373 appendfield(pathlast, "sha256=%s", cur->sha256digest); 374 if (MATCHFLAG(F_SHA384)) 375 appendfield(pathlast, "sha384=%s", cur->sha384digest); 376 if (MATCHFLAG(F_SHA512)) 377 appendfield(pathlast, "sha512=%s", cur->sha512digest); 378 if (MATCHFLAG(F_FLAGS)) { 379 str = flags_to_string(cur->st_flags, "none"); 380 appendfield(pathlast, "flags=%s", str); 381 free(str); 382 } 383 if (MATCHFLAG(F_IGN)) 384 appendfield(pathlast, "ignore"); 385 if (MATCHFLAG(F_OPT)) 386 appendfield(pathlast, "optional"); 387 if (MATCHFLAG(F_TAGS)) { 388 /* don't output leading or trailing commas */ 389 p = cur->tags; 390 while (*p == ',') 391 p++; 392 q = p + strlen(p); 393 while(q > p && q[-1] == ',') 394 q--; 395 appendfield(pathlast, "tags=%.*s", (int)(q - p), p); 396 } 397 puts(pathlast ? vispath(path) : ""); 398 399 if (cur->child) 400 dump_nodes(path, cur->child, pathlast); 401 } 402} 403 404/* 405 * vispath -- 406 * strsvis(3) encodes path, which must not be longer than MAXPATHLEN 407 * characters long, and returns a pointer to a static buffer containing 408 * the result. 409 */ 410char * 411vispath(const char *path) 412{ 413 const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 414 static char pathbuf[4*MAXPATHLEN + 1]; 415 416 strsvis(pathbuf, path, VIS_CSTYLE, extra); 417 return(pathbuf); 418} 419 420 421static dev_t 422parsedev(char *arg) 423{ 424#define MAX_PACK_ARGS 3 425 u_long numbers[MAX_PACK_ARGS]; 426 char *p, *ep, *dev; 427 int argc; 428 pack_t *pack; 429 dev_t result; 430 const char *error = NULL; 431 432 if ((dev = strchr(arg, ',')) != NULL) { 433 *dev++='\0'; 434 if ((pack = pack_find(arg)) == NULL) 435 mtree_err("unknown format `%s'", arg); 436 argc = 0; 437 while ((p = strsep(&dev, ",")) != NULL) { 438 if (*p == '\0') 439 mtree_err("missing number"); 440 numbers[argc++] = strtoul(p, &ep, 0); 441 if (*ep != '\0') 442 mtree_err("invalid number `%s'", 443 p); 444 if (argc > MAX_PACK_ARGS) 445 mtree_err("too many arguments"); 446 } 447 if (argc < 2) 448 mtree_err("not enough arguments"); 449 result = (*pack)(argc, numbers, &error); 450 if (error != NULL) 451 mtree_err("%s", error); 452 } else { 453 result = (dev_t)strtoul(arg, &ep, 0); 454 if (*ep != '\0') 455 mtree_err("invalid device `%s'", arg); 456 } 457 return (result); 458} 459 460static void 461replacenode(NODE *cur, NODE *new) 462{ 463 464#define REPLACE(x) cur->x = new->x 465#define REPLACESTR(x) REPLACEPTR(cur->x,new->x) 466 467 if (cur->type != new->type) { 468 if (mtree_Mflag) { 469 /* 470 * merge entries with different types; we 471 * don't want children retained in this case. 472 */ 473 REPLACE(type); 474 free_nodes(cur->child); 475 cur->child = NULL; 476 } else { 477 mtree_err( 478 "existing entry for `%s', type `%s'" 479 " does not match type `%s'", 480 cur->name, nodetype(cur->type), 481 nodetype(new->type)); 482 } 483 } 484 485 REPLACE(st_size); 486 REPLACE(st_mtimespec); 487 REPLACESTR(slink); 488 if (cur->slink != NULL) { 489 if ((cur->slink = strdup(new->slink)) == NULL) 490 mtree_err("memory allocation error"); 491 if (strunvis(cur->slink, new->slink) == -1) 492 mtree_err("strunvis failed on `%s'", new->slink); 493 free(new->slink); 494 } 495 REPLACE(st_uid); 496 REPLACE(st_gid); 497 REPLACE(st_mode); 498 REPLACE(st_rdev); 499 REPLACE(st_flags); 500 REPLACE(st_nlink); 501 REPLACE(cksum); 502 REPLACESTR(md5digest); 503 REPLACESTR(rmd160digest); 504 REPLACESTR(sha1digest); 505 REPLACESTR(sha256digest); 506 REPLACESTR(sha384digest); 507 REPLACESTR(sha512digest); 508 REPLACESTR(tags); 509 REPLACE(lineno); 510 REPLACE(flags); 511 free(new); 512} 513 514static void 515set(char *t, NODE *ip) 516{ 517 int type, value, len; 518 gid_t gid; 519 uid_t uid; 520 char *kw, *val, *md, *ep; 521 void *m; 522 523 while ((kw = strsep(&t, "= \t")) != NULL) { 524 if (*kw == '\0') 525 continue; 526 if (strcmp(kw, "all") == 0) 527 mtree_err("invalid keyword `all'"); 528 ip->flags |= type = parsekey(kw, &value); 529 if (!value) 530 /* Just set flag bit (F_IGN and F_OPT) */ 531 continue; 532 while ((val = strsep(&t, " \t")) != NULL && *val == '\0') 533 continue; 534 if (val == NULL) 535 mtree_err("missing value"); 536 switch (type) { 537 case F_CKSUM: 538 ip->cksum = strtoul(val, &ep, 10); 539 if (*ep) 540 mtree_err("invalid checksum `%s'", val); 541 break; 542 case F_DEV: 543 ip->st_rdev = parsedev(val); 544 break; 545 case F_FLAGS: 546 if (strcmp("none", val) == 0) 547 ip->st_flags = 0; 548 else if (string_to_flags(&val, &ip->st_flags, NULL) 549 != 0) 550 mtree_err("invalid flag `%s'", val); 551 break; 552 case F_GID: 553 ip->st_gid = (gid_t)strtoul(val, &ep, 10); 554 if (*ep) 555 mtree_err("invalid gid `%s'", val); 556 break; 557 case F_GNAME: 558 if (mtree_Wflag) /* don't parse if whacking */ 559 break; 560 if (gid_from_group(val, &gid) == -1) 561 mtree_err("unknown group `%s'", val); 562 ip->st_gid = gid; 563 break; 564 case F_MD5: 565 if (val[0]=='0' && val[1]=='x') 566 md=&val[2]; 567 else 568 md=val; 569 if ((ip->md5digest = strdup(md)) == NULL) 570 mtree_err("memory allocation error"); 571 break; 572 case F_MODE: 573 if ((m = setmode(val)) == NULL) 574 mtree_err("cannot set file mode `%s' (%s)", 575 val, strerror(errno)); 576 ip->st_mode = getmode(m, 0); 577 free(m); 578 break; 579 case F_NLINK: 580 ip->st_nlink = (nlink_t)strtoul(val, &ep, 10); 581 if (*ep) 582 mtree_err("invalid link count `%s'", val); 583 break; 584 case F_RMD160: 585 if (val[0]=='0' && val[1]=='x') 586 md=&val[2]; 587 else 588 md=val; 589 if ((ip->rmd160digest = strdup(md)) == NULL) 590 mtree_err("memory allocation error"); 591 break; 592 case F_SHA1: 593 if (val[0]=='0' && val[1]=='x') 594 md=&val[2]; 595 else 596 md=val; 597 if ((ip->sha1digest = strdup(md)) == NULL) 598 mtree_err("memory allocation error"); 599 break; 600 case F_SIZE: 601 ip->st_size = (off_t)strtoll(val, &ep, 10); 602 if (*ep) 603 mtree_err("invalid size `%s'", val); 604 break; 605 case F_SLINK: 606 if ((ip->slink = strdup(val)) == NULL) 607 mtree_err("memory allocation error"); 608 if (strunvis(ip->slink, val) == -1) 609 mtree_err("strunvis failed on `%s'", val); 610 break; 611 case F_TAGS: 612 len = strlen(val) + 3; /* "," + str + ",\0" */ 613 if ((ip->tags = malloc(len)) == NULL) 614 mtree_err("memory allocation error"); 615 snprintf(ip->tags, len, ",%s,", val); 616 break; 617 case F_TIME: 618 ip->st_mtimespec.tv_sec = 619 (time_t)strtoll(val, &ep, 10); 620 if (*ep != '.') 621 mtree_err("invalid time `%s'", val); 622 val = ep + 1; 623 ip->st_mtimespec.tv_nsec = strtol(val, &ep, 10); 624 if (*ep) 625 mtree_err("invalid time `%s'", val); 626 break; 627 case F_TYPE: 628 ip->type = parsetype(val); 629 break; 630 case F_UID: 631 ip->st_uid = (uid_t)strtoul(val, &ep, 10); 632 if (*ep) 633 mtree_err("invalid uid `%s'", val); 634 break; 635 case F_UNAME: 636 if (mtree_Wflag) /* don't parse if whacking */ 637 break; 638 if (uid_from_user(val, &uid) == -1) 639 mtree_err("unknown user `%s'", val); 640 ip->st_uid = uid; 641 break; 642 case F_SHA256: 643 if (val[0]=='0' && val[1]=='x') 644 md=&val[2]; 645 else 646 md=val; 647 if ((ip->sha256digest = strdup(md)) == NULL) 648 mtree_err("memory allocation error"); 649 break; 650 case F_SHA384: 651 if (val[0]=='0' && val[1]=='x') 652 md=&val[2]; 653 else 654 md=val; 655 if ((ip->sha384digest = strdup(md)) == NULL) 656 mtree_err("memory allocation error"); 657 break; 658 case F_SHA512: 659 if (val[0]=='0' && val[1]=='x') 660 md=&val[2]; 661 else 662 md=val; 663 if ((ip->sha512digest = strdup(md)) == NULL) 664 mtree_err("memory allocation error"); 665 break; 666 default: 667 mtree_err( 668 "set(): unsupported key type 0x%x (INTERNAL ERROR)", 669 type); 670 /* NOTREACHED */ 671 } 672 } 673} 674 675static void 676unset(char *t, NODE *ip) 677{ 678 char *p; 679 680 while ((p = strsep(&t, " \t")) != NULL) { 681 if (*p == '\0') 682 continue; 683 ip->flags &= ~parsekey(p, NULL); 684 } 685} 686 687/* 688 * addchild -- 689 * Add the centry node as a child of the pathparent node. If 690 * centry is a duplicate, call replacenode(). If centry is not 691 * a duplicate, insert it into the linked list referenced by 692 * pathparent->child. Keep the list sorted if Sflag is set. 693 */ 694static void 695addchild(NODE *pathparent, NODE *centry) 696{ 697 NODE *samename; /* node with the same name as centry */ 698 NODE *replacepos; /* if non-NULL, centry should replace this node */ 699 NODE *insertpos; /* if non-NULL, centry should be inserted 700 * after this node */ 701 NODE *cur; /* for stepping through the list */ 702 NODE *last; /* the last node in the list */ 703 int cmp; 704 705 samename = NULL; 706 replacepos = NULL; 707 insertpos = NULL; 708 last = NULL; 709 cur = pathparent->child; 710 if (cur == NULL) { 711 /* centry is pathparent's first and only child node so far */ 712 pathparent->child = centry; 713 return; 714 } 715 716 /* 717 * pathparent already has at least one other child, so add the 718 * centry node to the list. 719 * 720 * We first scan through the list looking for an existing node 721 * with the same name (setting samename), and also looking 722 * for the correct position to replace or insert the new node 723 * (setting replacepos and/or insertpos). 724 */ 725 for (; cur != NULL; last = cur, cur = cur->next) { 726 if (strcmp(centry->name, cur->name) == 0) { 727 samename = cur; 728 } 729 if (mtree_Sflag) { 730 cmp = nodecmp(centry, cur); 731 if (cmp == 0) { 732 replacepos = cur; 733 } else if (cmp > 0) { 734 insertpos = cur; 735 } 736 } 737 } 738 if (! mtree_Sflag) { 739 if (samename != NULL) { 740 /* replace node with same name */ 741 replacepos = samename; 742 } else { 743 /* add new node at end of list */ 744 insertpos = last; 745 } 746 } 747 748 if (samename != NULL) { 749 /* 750 * We found a node with the same name above. Call 751 * replacenode(), which will either exit with an error, 752 * or replace the information in the samename node and 753 * free the information in the centry node. 754 */ 755 replacenode(samename, centry); 756 if (samename == replacepos) { 757 /* The just-replaced node was in the correct position */ 758 return; 759 } 760 if (samename == insertpos || samename->prev == insertpos) { 761 /* 762 * We thought the new node should be just before 763 * or just after the replaced node, but that would 764 * be equivalent to just retaining the replaced node. 765 */ 766 return; 767 } 768 769 /* 770 * The just-replaced node is in the wrong position in 771 * the list. This can happen if sort order depends on 772 * criteria other than the node name. 773 * 774 * Make centry point to the just-replaced node. Unlink 775 * the just-replaced node from the list, and allow it to 776 * be insterted in the correct position later. 777 */ 778 centry = samename; 779 if (centry->prev) 780 centry->prev->next = centry->next; 781 else { 782 /* centry->next is the new head of the list */ 783 pathparent->child = centry->next; 784 assert(centry->next != NULL); 785 } 786 if (centry->next) 787 centry->next->prev = centry->prev; 788 centry->prev = NULL; 789 centry->next = NULL; 790 } 791 792 if (insertpos == NULL) { 793 /* insert centry at the beginning of the list */ 794 pathparent->child->prev = centry; 795 centry->next = pathparent->child; 796 centry->prev = NULL; 797 pathparent->child = centry; 798 } else { 799 /* insert centry into the list just after insertpos */ 800 centry->next = insertpos->next; 801 insertpos->next = centry; 802 centry->prev = insertpos; 803 if (centry->next) 804 centry->next->prev = centry; 805 } 806 return; 807} 808 809/* 810 * nodecmp -- 811 * used as a comparison function by addchild() to control the order 812 * in which entries appear within a list of sibling nodes. We make 813 * directories sort after non-directories, but otherwise sort in 814 * strcmp() order. 815 * 816 * Keep this in sync with dcmp() in create.c. 817 */ 818static int 819nodecmp(const NODE *a, const NODE *b) 820{ 821 822 if ((a->type & F_DIR) != 0) { 823 if ((b->type & F_DIR) == 0) 824 return 1; 825 } else if ((b->type & F_DIR) != 0) 826 return -1; 827 return strcmp(a->name, b->name); 828} 829