1 %union { 2 char *str; 3 int val; 4 struct file_list *file; 5 } 6 7 %token ARCH 8 %token COMMA 9 %token CONFIG 10 %token CPU 11 %token NOCPU 12 %token DEVICE 13 %token NODEVICE 14 %token ENV 15 %token ENVVAR 16 %token EQUALS 17 %token PLUSEQUALS 18 %token HINTS 19 %token IDENT 20 %token MAXUSERS 21 %token OPTIONS 22 %token NOOPTION 23 %token MAKEOPTIONS 24 %token NOMAKEOPTION 25 %token SEMICOLON 26 %token INCLUDE 27 %token FILES 28 29 %token <str> ENVLINE 30 %token <str> ID 31 %token <val> NUMBER 32 33 %type <str> Save_id 34 %type <str> Opt_value 35 %type <str> Dev 36 %token <str> PATH 37 38 %{ 39 40 /*- 41 * SPDX-License-Identifier: BSD-3-Clause 42 * 43 * Copyright (c) 1988, 1993 44 * The Regents of the University of California. All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)config.y 8.1 (Berkeley) 6/6/93 71 * $FreeBSD$ 72 */ 73 74 #include <assert.h> 75 #include <ctype.h> 76 #include <err.h> 77 #include <stdio.h> 78 #include <string.h> 79 80 #include "config.h" 81 82 struct device_head dtab; 83 char *ident; 84 char *env; 85 int yyline; 86 const char *yyfile; 87 struct file_list_head ftab; 88 struct files_name_head fntab; 89 char errbuf[80]; 90 int maxusers; 91 92 #define ns(s) strdup(s) 93 int include(const char *, int); 94 void yyerror(const char *s); 95 int yywrap(void); 96 97 static void newdev(char *name); 98 static void newfile(char *name); 99 static void newenvvar(char *name, bool is_file); 100 static void rmdev_schedule(struct device_head *dh, char *name); 101 static void newopt(struct opt_head *list, char *name, char *value, int append, int dupe); 102 static void rmopt_schedule(struct opt_head *list, char *name); 103 104 static char * 105 devopt(char *dev) 106 { 107 char *ret = malloc(strlen(dev) + 5); 108 109 sprintf(ret, "DEV_%s", dev); 110 raisestr(ret); 111 return ret; 112 } 113 114 %} 115 %% 116 Configuration: 117 Many_specs 118 ; 119 120 Many_specs: 121 Many_specs Spec 122 | 123 /* lambda */ 124 ; 125 126 Spec: 127 Device_spec SEMICOLON 128 | 129 Config_spec SEMICOLON 130 | 131 INCLUDE PATH SEMICOLON { 132 if (incignore == 0) 133 include($2, 0); 134 }; 135 | 136 INCLUDE ID SEMICOLON { 137 if (incignore == 0) 138 include($2, 0); 139 }; 140 | 141 FILES ID SEMICOLON { newfile($2); }; 142 | 143 SEMICOLON 144 | 145 error SEMICOLON 146 ; 147 148 Config_spec: 149 ARCH Save_id { 150 if (machinename != NULL && !eq($2, machinename)) 151 errx(1, "%s:%d: only one machine directive is allowed", 152 yyfile, yyline); 153 machinename = $2; 154 machinearch = $2; 155 } | 156 ARCH Save_id Save_id { 157 /* 158 * Allow the machinearch to change with a second machine directive, 159 * but still enforce no changes to the machinename. 160 */ 161 if (machinename != NULL && !eq($2, machinename)) 162 errx(1, "%s:%d: only one machine directive is allowed", 163 yyfile, yyline); 164 machinename = $2; 165 machinearch = $3; 166 } | 167 CPU Save_id { 168 struct cputype *cp = 169 (struct cputype *)calloc(1, sizeof (struct cputype)); 170 if (cp == NULL) 171 err(EXIT_FAILURE, "calloc"); 172 cp->cpu_name = $2; 173 SLIST_INSERT_HEAD(&cputype, cp, cpu_next); 174 } | 175 NOCPU Save_id { 176 struct cputype *cp, *cp2; 177 SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) { 178 if (eq(cp->cpu_name, $2)) { 179 SLIST_REMOVE(&cputype, cp, cputype, cpu_next); 180 free(cp); 181 } 182 } 183 } | 184 OPTIONS Opt_list 185 | 186 NOOPTION NoOpt_list | 187 MAKEOPTIONS Mkopt_list 188 | 189 NOMAKEOPTION Save_id { rmopt_schedule(&mkopt, $2); } | 190 IDENT ID { ident = $2; } | 191 System_spec 192 | 193 MAXUSERS NUMBER { maxusers = $2; } | 194 ENV ID { newenvvar($2, true); } | 195 ENVVAR ENVLINE { newenvvar($2, false); } | 196 HINTS ID { 197 struct hint *hint; 198 199 hint = (struct hint *)calloc(1, sizeof (struct hint)); 200 if (hint == NULL) 201 err(EXIT_FAILURE, "calloc"); 202 hint->hint_name = $2; 203 STAILQ_INSERT_HEAD(&hints, hint, hint_next); 204 } 205 206 System_id: 207 Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0, 0); }; 208 209 System_parameter_list: 210 System_parameter_list ID 211 | ID 212 ; 213 214 Opt_list: 215 Opt_list COMMA Option 216 | 217 Option 218 ; 219 220 NoOpt_list: 221 NoOpt_list COMMA NoOption 222 | 223 NoOption 224 ; 225 Option: 226 Save_id { 227 newopt(&opt, $1, NULL, 0, 1); 228 if (strchr($1, '=') != NULL) 229 errx(1, "%s:%d: The `=' in options should not be " 230 "quoted", yyfile, yyline); 231 } | 232 Save_id EQUALS Opt_value { 233 newopt(&opt, $1, $3, 0, 1); 234 } ; 235 236 NoOption: 237 Save_id { 238 rmopt_schedule(&opt, $1); 239 }; 240 241 Opt_value: 242 ID { $$ = $1; } | 243 NUMBER { 244 char buf[80]; 245 246 (void) snprintf(buf, sizeof(buf), "%d", $1); 247 $$ = ns(buf); 248 } ; 249 250 Save_id: 251 ID { $$ = $1; } 252 ; 253 254 Mkopt_list: 255 Mkopt_list COMMA Mkoption 256 | 257 Mkoption 258 ; 259 260 Mkoption: 261 Save_id { newopt(&mkopt, $1, ns(""), 0, 0); } | 262 Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0, 0); } | 263 Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0, 0); } | 264 Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1, 0); } ; 265 266 Dev: 267 ID { $$ = $1; } 268 ; 269 270 Device_spec: 271 DEVICE Dev_list 272 | 273 NODEVICE NoDev_list 274 ; 275 276 Dev_list: 277 Dev_list COMMA Device 278 | 279 Device 280 ; 281 282 NoDev_list: 283 NoDev_list COMMA NoDevice 284 | 285 NoDevice 286 ; 287 288 Device: 289 Dev { 290 newopt(&opt, devopt($1), ns("1"), 0, 0); 291 /* and the device part */ 292 newdev($1); 293 } 294 295 NoDevice: 296 Dev { 297 char *s = devopt($1); 298 299 rmopt_schedule(&opt, s); 300 free(s); 301 /* and the device part */ 302 rmdev_schedule(&dtab, $1); 303 } ; 304 305 %% 306 307 void 308 yyerror(const char *s) 309 { 310 311 errx(1, "%s:%d: %s", yyfile, yyline + 1, s); 312 } 313 314 int 315 yywrap(void) 316 { 317 if (found_defaults) { 318 if (freopen(PREFIX, "r", stdin) == NULL) 319 err(2, "%s", PREFIX); 320 yyfile = PREFIX; 321 yyline = 0; 322 found_defaults = 0; 323 return 0; 324 } 325 return 1; 326 } 327 328 /* 329 * Add a new file to the list of files. 330 */ 331 static void 332 newfile(char *name) 333 { 334 struct files_name *nl; 335 336 nl = (struct files_name *) calloc(1, sizeof *nl); 337 if (nl == NULL) 338 err(EXIT_FAILURE, "calloc"); 339 nl->f_name = name; 340 STAILQ_INSERT_TAIL(&fntab, nl, f_next); 341 } 342 343 static void 344 newenvvar(char *name, bool is_file) 345 { 346 struct envvar *envvar; 347 348 envvar = (struct envvar *)calloc(1, sizeof (struct envvar)); 349 if (envvar == NULL) 350 err(EXIT_FAILURE, "calloc"); 351 envvar->env_str = name; 352 envvar->env_is_file = is_file; 353 STAILQ_INSERT_HEAD(&envvars, envvar, envvar_next); 354 } 355 356 /* 357 * Find a device in the list of devices. 358 */ 359 static struct device * 360 finddev(struct device_head *dlist, char *name) 361 { 362 struct device *dp; 363 364 STAILQ_FOREACH(dp, dlist, d_next) 365 if (eq(dp->d_name, name)) 366 return (dp); 367 368 return (NULL); 369 } 370 371 /* 372 * Add a device to the list of devices. 373 */ 374 static void 375 newdev(char *name) 376 { 377 struct device *np, *dp; 378 379 if ((dp = finddev(&dtab, name)) != NULL) { 380 if (strcmp(dp->yyfile, yyfile) == 0) 381 fprintf(stderr, 382 "WARNING: duplicate device `%s' encountered in %s\n", 383 name, yyfile); 384 return; 385 } 386 387 np = (struct device *) calloc(1, sizeof *np); 388 if (np == NULL) 389 err(EXIT_FAILURE, "calloc"); 390 np->d_name = name; 391 np->yyfile = strdup(yyfile); 392 STAILQ_INSERT_TAIL(&dtab, np, d_next); 393 } 394 395 /* 396 * Schedule a device to removal. 397 */ 398 static void 399 rmdev_schedule(struct device_head *dh, char *name) 400 { 401 struct device *dp; 402 403 dp = finddev(dh, name); 404 if (dp != NULL) { 405 STAILQ_REMOVE(dh, dp, device, d_next); 406 free(dp->yyfile); 407 free(dp->d_name); 408 free(dp); 409 } 410 } 411 412 /* 413 * Find an option in the list of options. 414 */ 415 static struct opt * 416 findopt(struct opt_head *list, char *name) 417 { 418 struct opt *op; 419 420 SLIST_FOREACH(op, list, op_next) 421 if (eq(op->op_name, name)) 422 return (op); 423 424 return (NULL); 425 } 426 427 /* 428 * Add an option to the list of options. 429 */ 430 static void 431 newopt(struct opt_head *list, char *name, char *value, int append, int dupe) 432 { 433 struct opt *op, *op2; 434 435 /* 436 * Ignore inclusions listed explicitly for configuration files. 437 */ 438 if (eq(name, OPT_AUTOGEN)) { 439 incignore = 1; 440 return; 441 } 442 443 op2 = findopt(list, name); 444 if (op2 != NULL && !append && !dupe) { 445 if (strcmp(op2->yyfile, yyfile) == 0) 446 fprintf(stderr, 447 "WARNING: duplicate option `%s' encountered.\n", name); 448 return; 449 } 450 451 op = (struct opt *)calloc(1, sizeof (struct opt)); 452 if (op == NULL) 453 err(EXIT_FAILURE, "calloc"); 454 op->op_name = name; 455 op->op_ownfile = 0; 456 op->op_value = value; 457 op->yyfile = strdup(yyfile); 458 if (op2 != NULL) { 459 if (append) { 460 while (SLIST_NEXT(op2, op_append) != NULL) 461 op2 = SLIST_NEXT(op2, op_append); 462 SLIST_NEXT(op2, op_append) = op; 463 } else { 464 while (SLIST_NEXT(op2, op_next) != NULL) 465 op2 = SLIST_NEXT(op2, op_next); 466 SLIST_NEXT(op2, op_next) = op; 467 } 468 } else 469 SLIST_INSERT_HEAD(list, op, op_next); 470 } 471 472 /* 473 * Remove an option from the list of options. 474 */ 475 static void 476 rmopt_schedule(struct opt_head *list, char *name) 477 { 478 struct opt *op; 479 480 while ((op = findopt(list, name)) != NULL) { 481 SLIST_REMOVE(list, op, opt, op_next); 482 free(op->yyfile); 483 free(op->op_name); 484 free(op); 485 } 486 } 487