files.c revision 1.29
1 /* $NetBSD: files.c,v 1.29 2015/09/03 14:23:52 uebayasi Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratories. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: @(#)files.c 8.1 (Berkeley) 6/6/93 41 */ 42 43 #if HAVE_NBTOOL_CONFIG_H 44 #include "nbtool_config.h" 45 #endif 46 47 #include <sys/cdefs.h> 48 __RCSID("$NetBSD: files.c,v 1.29 2015/09/03 14:23:52 uebayasi Exp $"); 49 50 #include <sys/param.h> 51 #include <errno.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <util.h> 56 #include "defs.h" 57 58 extern const char *yyfile; 59 60 /* 61 * We check that each full path name is unique. File base names 62 * should generally also be unique, e.g., having both a net/xx.c and 63 * a kern/xx.c (or, worse, a net/xx.c and a new/xx.c++) is probably 64 * wrong, but is permitted under some conditions. 65 */ 66 static struct hashtab *basetab; /* file base names */ 67 static struct hashtab *pathtab; /* full path names */ 68 69 static struct files **unchecked; 70 71 static void addfiletoattr(const char *, struct files *); 72 static int checkaux(const char *, void *); 73 static int fixcount(const char *, void *); 74 static int fixfsel(const char *, void *); 75 static int fixsel(const char *, void *); 76 77 void 78 initfiles(void) 79 { 80 81 basetab = ht_new(); 82 pathtab = ht_new(); 83 TAILQ_INIT(&allfiles); 84 TAILQ_INIT(&allcfiles); 85 TAILQ_INIT(&allsfiles); 86 TAILQ_INIT(&allofiles); 87 unchecked = &TAILQ_FIRST(&allfiles); 88 } 89 90 void 91 addfile(const char *path, struct condexpr *optx, u_char flags, const char *rule) 92 { 93 struct files *fi; 94 const char *dotp, *tail; 95 size_t baselen; 96 size_t dirlen; 97 int needc, needf; 98 char base[200]; 99 char dir[MAXPATHLEN]; 100 101 /* check various errors */ 102 needc = flags & FI_NEEDSCOUNT; 103 needf = flags & FI_NEEDSFLAG; 104 if (needc && needf) { 105 cfgerror("cannot mix needs-count and needs-flag"); 106 goto bad; 107 } 108 if (optx == NULL && (needc || needf)) { 109 cfgerror("nothing to %s for %s", needc ? "count" : "flag", 110 path); 111 goto bad; 112 } 113 if (*path == '/') { 114 cfgerror("path must be relative"); 115 goto bad; 116 } 117 118 /* find last part of pathname, and same without trailing suffix */ 119 tail = strrchr(path, '/'); 120 if (tail == NULL) { 121 dirlen = 0; 122 tail = path; 123 } else { 124 dirlen = (size_t)(tail - path); 125 tail++; 126 } 127 memcpy(dir, path, dirlen); 128 dir[dirlen] = '\0'; 129 130 dotp = strrchr(tail, '.'); 131 if (dotp == NULL || dotp[1] == 0 || 132 (baselen = (size_t)(dotp - tail)) >= sizeof(base)) { 133 cfgerror("invalid pathname `%s'", path); 134 goto bad; 135 } 136 137 /* 138 * Commit this file to memory. We will decide later whether it 139 * will be used after all. 140 */ 141 fi = ecalloc(1, sizeof *fi); 142 if (ht_insert(pathtab, path, fi)) { 143 free(fi); 144 if ((fi = ht_lookup(pathtab, path)) == NULL) 145 panic("addfile: ht_lookup(%s)", path); 146 147 /* 148 * If it's a duplicate entry, it is must specify a make 149 * rule, and only a make rule, and must come from 150 * a different source file than the original entry. 151 * If it does otherwise, it is disallowed. This allows 152 * machine-dependent files to override the compilation 153 * options for specific files. 154 */ 155 if (rule != NULL && optx == NULL && flags == 0 && 156 yyfile != fi->fi_srcfile) { 157 fi->fi_mkrule = rule; 158 return; 159 } 160 cfgerror("duplicate file %s", path); 161 cfgxerror(fi->fi_srcfile, fi->fi_srcline, 162 "here is the original definition"); 163 goto bad; 164 } 165 memcpy(base, tail, baselen); 166 base[baselen] = '\0'; 167 fi->fi_srcfile = yyfile; 168 fi->fi_srcline = currentline(); 169 fi->fi_flags = flags; 170 fi->fi_path = path; 171 fi->fi_tail = tail; 172 fi->fi_base = intern(base); 173 fi->fi_dir = intern(dir); 174 fi->fi_prefix = SLIST_EMPTY(&prefixes) ? NULL : 175 SLIST_FIRST(&prefixes)->pf_prefix; 176 fi->fi_buildprefix = SLIST_EMPTY(&buildprefixes) ? NULL : 177 SLIST_FIRST(&buildprefixes)->pf_prefix; 178 fi->fi_len = strlen(path); 179 fi->fi_suffix = path[fi->fi_len - 1]; 180 fi->fi_optx = optx; 181 fi->fi_optf = NULL; 182 fi->fi_mkrule = rule; 183 fi->fi_attr = NULL; 184 switch (fi->fi_suffix) { 185 case 'c': 186 TAILQ_INSERT_TAIL(&allcfiles, fi, fi_snext); 187 TAILQ_INSERT_TAIL(&allfiles, fi, fi_next); 188 break; 189 case 'S': 190 fi->fi_suffix = 's'; 191 /* FALLTHRU */ 192 case 's': 193 TAILQ_INSERT_TAIL(&allsfiles, fi, fi_snext); 194 TAILQ_INSERT_TAIL(&allfiles, fi, fi_next); 195 break; 196 case 'o': 197 TAILQ_INSERT_TAIL(&allofiles, fi, fi_snext); 198 break; 199 default: 200 cfgxerror(fi->fi_srcfile, fi->fi_srcline, 201 "unknown suffix"); 202 break; 203 } 204 return; 205 bad: 206 if (optx != NULL) { 207 condexpr_destroy(optx); 208 } 209 } 210 211 static void 212 addfiletoattr(const char *name, struct files *fi) 213 { 214 struct attr *a; 215 216 a = ht_lookup(attrtab, name); 217 if (a == NULL) { 218 CFGDBG(1, "attr `%s' not found", name); 219 } else { 220 fi->fi_attr = a; 221 TAILQ_INSERT_TAIL(&a->a_files, fi, fi_anext); 222 } 223 } 224 225 /* 226 * We have finished reading some "files" file, either ../../conf/files 227 * or ./files.$machine. Make sure that everything that is flagged as 228 * needing a count is reasonable. (This prevents ../../conf/files from 229 * depending on some machine-specific device.) 230 */ 231 void 232 checkfiles(void) 233 { 234 struct files *fi, *last; 235 236 last = NULL; 237 for (fi = *unchecked; fi != NULL; 238 last = fi, fi = TAILQ_NEXT(fi, fi_next)) { 239 if ((fi->fi_flags & FI_NEEDSCOUNT) != 0) 240 (void)expr_eval(fi->fi_optx, checkaux, fi); 241 } 242 if (last != NULL) 243 unchecked = &TAILQ_NEXT(last, fi_next); 244 } 245 246 /* 247 * Auxiliary function for checkfiles, called from expr_eval. 248 * We are not actually interested in the expression's value. 249 */ 250 static int 251 checkaux(const char *name, void *context) 252 { 253 struct files *fi = context; 254 255 if (ht_lookup(devbasetab, name) == NULL) { 256 cfgxerror(fi->fi_srcfile, fi->fi_srcline, 257 "`%s' is not a countable device", 258 name); 259 /* keep fixfiles() from complaining again */ 260 fi->fi_flags |= FI_HIDDEN; 261 } 262 return (0); 263 } 264 265 /* 266 * We have finished reading everything. Tack the files down: calculate 267 * selection and counts as needed. Check that the object files built 268 * from the selected sources do not collide. 269 */ 270 int 271 fixfiles(void) 272 { 273 struct files *fi, *ofi; 274 struct nvlist *flathead, **flatp; 275 int err, sel; 276 277 addfile("devsw.c", NULL, 0, NULL); 278 addfile("ioconf.c", NULL, 0, NULL); 279 280 if (Sflag) { 281 struct config *cf; 282 char swapname[100]; 283 284 TAILQ_FOREACH(cf, &allcf, cf_next) { 285 (void)snprintf(swapname, sizeof(swapname), "swap%s.c", 286 cf->cf_name); 287 addfile(intern(swapname), NULL, 0, NULL); 288 } 289 } 290 291 err = 0; 292 TAILQ_FOREACH(fi, &allfiles, fi_next) { 293 294 /* Skip files that generated counted-device complaints. */ 295 if (fi->fi_flags & FI_HIDDEN) 296 continue; 297 298 if (fi->fi_optx != NULL) { 299 if (fi->fi_optx->cx_type == CX_ATOM) { 300 addfiletoattr(fi->fi_optx->cx_u.atom, fi); 301 } 302 flathead = NULL; 303 flatp = &flathead; 304 sel = expr_eval(fi->fi_optx, 305 fi->fi_flags & FI_NEEDSCOUNT ? fixcount : 306 fi->fi_flags & FI_NEEDSFLAG ? fixfsel : 307 fixsel, 308 &flatp); 309 fi->fi_optf = flathead; 310 if (!sel) 311 continue; 312 } 313 314 /* We like this file. Make sure it generates a unique .o. */ 315 if (ht_insert(basetab, fi->fi_base, fi)) { 316 if ((ofi = ht_lookup(basetab, fi->fi_base)) == NULL) 317 panic("fixfiles ht_lookup(%s)", fi->fi_base); 318 /* 319 * If the new file comes from a different source, 320 * allow the new one to override the old one. 321 */ 322 if (fi->fi_path != ofi->fi_path) { 323 if (ht_replace(basetab, fi->fi_base, fi) != 1) 324 panic("fixfiles ht_replace(%s)", 325 fi->fi_base); 326 ofi->fi_flags &= (u_char)~FI_SEL; 327 ofi->fi_flags |= FI_HIDDEN; 328 } else { 329 cfgxerror(fi->fi_srcfile, fi->fi_srcline, 330 "object file collision on %s.o, from %s", 331 fi->fi_base, fi->fi_path); 332 cfgxerror(ofi->fi_srcfile, ofi->fi_srcline, 333 "here is the previous file: %s", 334 ofi->fi_path); 335 err = 1; 336 } 337 } 338 fi->fi_flags |= FI_SEL; 339 CFGDBG(3, "file selected `%s'", fi->fi_path); 340 341 /* Add other files to the default "netbsd" attribute. */ 342 if (fi->fi_attr == NULL) { 343 addfiletoattr(allattr.a_name, fi); 344 } 345 CFGDBG(3, "file `%s' belongs to attr `%s'", fi->fi_path, 346 fi->fi_attr->a_name); 347 } 348 return (err); 349 } 350 351 /* 352 * We have finished reading everything. Tack the objects down: calculate 353 * selection. 354 */ 355 int 356 fixobjects(void) 357 { 358 struct files *fi; 359 struct nvlist *flathead, **flatp; 360 int err, sel; 361 362 err = 0; 363 TAILQ_FOREACH(fi, &allofiles, fi_snext) { 364 /* Optional: see if it is to be included. */ 365 if (fi->fi_optx != NULL) { 366 flathead = NULL; 367 flatp = &flathead; 368 sel = expr_eval(fi->fi_optx, 369 fi->fi_flags & FI_NEEDSFLAG ? fixfsel : 370 fixsel, 371 &flatp); 372 fi->fi_optf = flathead; 373 if (!sel) 374 continue; 375 } 376 377 fi->fi_flags |= FI_SEL; 378 } 379 return (err); 380 } 381 382 /* 383 * We have finished reading everything. Tack the devsws down: calculate 384 * selection. 385 */ 386 int 387 fixdevsw(void) 388 { 389 int error; 390 struct devm *dm, *res; 391 struct hashtab *fixdevmtab; 392 char mstr[16]; 393 394 error = 0; 395 fixdevmtab = ht_new(); 396 397 TAILQ_FOREACH(dm, &alldevms, dm_next) { 398 res = ht_lookup(fixdevmtab, intern(dm->dm_name)); 399 if (res != NULL) { 400 if (res->dm_cmajor != dm->dm_cmajor || 401 res->dm_bmajor != dm->dm_bmajor) { 402 cfgxerror(res->dm_srcfile, res->dm_srcline, 403 "device-major '%s' " 404 "block %d, char %d redefined" 405 " at %s:%d as block %d, char %d", 406 res->dm_name, 407 res->dm_bmajor, res->dm_cmajor, 408 dm->dm_srcfile, dm->dm_srcline, 409 dm->dm_bmajor, dm->dm_cmajor); 410 } else { 411 cfgxerror(res->dm_srcfile, res->dm_srcline, 412 "device-major '%s' " 413 "(block %d, char %d) duplicated" 414 " at %s:%d", 415 dm->dm_name, dm->dm_bmajor, 416 dm->dm_cmajor, 417 dm->dm_srcfile, dm->dm_srcline); 418 } 419 error = 1; 420 goto out; 421 } 422 if (ht_insert(fixdevmtab, intern(dm->dm_name), dm)) { 423 panic("fixdevsw: %s char %d block %d", 424 dm->dm_name, dm->dm_cmajor, dm->dm_bmajor); 425 } 426 427 if (dm->dm_opts != NULL && 428 !expr_eval(dm->dm_opts, fixsel, NULL)) 429 continue; 430 431 if (dm->dm_cmajor != NODEVMAJOR) { 432 if (ht_lookup(cdevmtab, intern(dm->dm_name)) != NULL) { 433 cfgxerror(dm->dm_srcfile, dm->dm_srcline, 434 "device-major of character device '%s' " 435 "is already defined", dm->dm_name); 436 error = 1; 437 goto out; 438 } 439 (void)snprintf(mstr, sizeof(mstr), "%d", dm->dm_cmajor); 440 if (ht_lookup(cdevmtab, intern(mstr)) != NULL) { 441 cfgxerror(dm->dm_srcfile, dm->dm_srcline, 442 "device-major of character major '%d' " 443 "is already defined", dm->dm_cmajor); 444 error = 1; 445 goto out; 446 } 447 if (ht_insert(cdevmtab, intern(dm->dm_name), dm) || 448 ht_insert(cdevmtab, intern(mstr), dm)) { 449 panic("fixdevsw: %s character major %d", 450 dm->dm_name, dm->dm_cmajor); 451 } 452 } 453 if (dm->dm_bmajor != NODEVMAJOR) { 454 if (ht_lookup(bdevmtab, intern(dm->dm_name)) != NULL) { 455 cfgxerror(dm->dm_srcfile, dm->dm_srcline, 456 "device-major of block device '%s' " 457 "is already defined", dm->dm_name); 458 error = 1; 459 goto out; 460 } 461 (void)snprintf(mstr, sizeof(mstr), "%d", dm->dm_bmajor); 462 if (ht_lookup(bdevmtab, intern(mstr)) != NULL) { 463 cfgxerror(dm->dm_srcfile, dm->dm_srcline, 464 "device-major of block major '%d' " 465 "is already defined", dm->dm_bmajor); 466 error = 1; 467 goto out; 468 } 469 if (ht_insert(bdevmtab, intern(dm->dm_name), dm) || 470 ht_insert(bdevmtab, intern(mstr), dm)) { 471 panic("fixdevsw: %s block major %d", 472 dm->dm_name, dm->dm_bmajor); 473 } 474 } 475 } 476 477 out: 478 ht_free(fixdevmtab); 479 return (error); 480 } 481 482 /* 483 * Called when evaluating a needs-count expression. Make sure the 484 * atom is a countable device. The expression succeeds iff there 485 * is at least one of them (note that while `xx*' will not always 486 * set xx's d_umax > 0, you cannot mix '*' and needs-count). The 487 * mkheaders() routine wants a flattened, in-order list of the 488 * atoms for `#define name value' lines, so we build that as we 489 * are called to eval each atom. 490 */ 491 static int 492 fixcount(const char *name, void *context) 493 { 494 struct nvlist ***p = context; 495 struct devbase *dev; 496 struct nvlist *nv; 497 498 dev = ht_lookup(devbasetab, name); 499 if (dev == NULL) /* cannot occur here; we checked earlier */ 500 panic("fixcount(%s)", name); 501 nv = newnv(name, NULL, NULL, dev->d_umax, NULL); 502 **p = nv; 503 *p = &nv->nv_next; 504 (void)ht_insert(needcnttab, name, nv); 505 return (dev->d_umax != 0); 506 } 507 508 /* 509 * Called from fixfiles when eval'ing a selection expression for a 510 * file that will generate a .h with flags. We will need the flat list. 511 */ 512 static int 513 fixfsel(const char *name, void *context) 514 { 515 struct nvlist ***p = context; 516 struct nvlist *nv; 517 int sel; 518 519 sel = ht_lookup(selecttab, name) != NULL; 520 nv = newnv(name, NULL, NULL, sel, NULL); 521 **p = nv; 522 *p = &nv->nv_next; 523 return (sel); 524 } 525 526 /* 527 * As for fixfsel above, but we do not need the flat list. 528 */ 529 static int 530 /*ARGSUSED*/ 531 fixsel(const char *name, void *context) 532 { 533 534 return (ht_lookup(selecttab, name) != NULL); 535 } 536 537 /* 538 * Eval an expression tree. Calls the given function on each node, 539 * passing it the given context & the name; return value is &/|/! of 540 * results of evaluating atoms. 541 * 542 * No short circuiting ever occurs. fn must return 0 or 1 (otherwise 543 * our mixing of C's bitwise & boolean here may give surprises). 544 */ 545 int 546 expr_eval(struct condexpr *expr, int (*fn)(const char *, void *), void *ctx) 547 { 548 int lhs, rhs; 549 550 switch (expr->cx_type) { 551 552 case CX_ATOM: 553 return ((*fn)(expr->cx_atom, ctx)); 554 555 case CX_NOT: 556 return (!expr_eval(expr->cx_not, fn, ctx)); 557 558 case CX_AND: 559 lhs = expr_eval(expr->cx_and.left, fn, ctx); 560 rhs = expr_eval(expr->cx_and.right, fn, ctx); 561 return (lhs & rhs); 562 563 case CX_OR: 564 lhs = expr_eval(expr->cx_or.left, fn, ctx); 565 rhs = expr_eval(expr->cx_or.right, fn, ctx); 566 return (lhs | rhs); 567 } 568 panic("invalid condexpr type %d", (int)expr->cx_type); 569 /* NOTREACHED */ 570 return (0); 571 } 572 573 #ifdef DEBUG 574 /* 575 * Print expression tree. 576 */ 577 void 578 prexpr(struct nvlist *expr) 579 { 580 static void pr0(); 581 582 printf("expr ="); 583 pr0(expr); 584 printf("\n"); 585 (void)fflush(stdout); 586 } 587 588 static void 589 pr0(struct nvlist *e) 590 { 591 592 switch (e->nv_num) { 593 case FX_ATOM: 594 printf(" %s", e->nv_name); 595 return; 596 case FX_NOT: 597 printf(" (!"); 598 break; 599 case FX_AND: 600 printf(" (&"); 601 break; 602 case FX_OR: 603 printf(" (|"); 604 break; 605 default: 606 printf(" (?%lld?", e->nv_num); 607 break; 608 } 609 if (e->nv_ptr) 610 pr0(e->nv_ptr); 611 pr0(e->nv_next); 612 printf(")"); 613 } 614 #endif 615
Indexes created Thu Oct 02 14:10:14 GMT 2025