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 MAXUSERS NUMBER { maxusers = $2; } | 192 ENV ID { newenvvar($2, true); } | 193 ENVVAR ENVLINE { newenvvar($2, false); } | 194 HINTS ID { 195 struct hint *hint; 196 197 hint = (struct hint *)calloc(1, sizeof (struct hint)); 198 if (hint == NULL) 199 err(EXIT_FAILURE, "calloc"); 200 hint->hint_name = $2; 201 STAILQ_INSERT_HEAD(&hints, hint, hint_next); 202 } 203 204 System_id: 205 Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0, 0); }; 206 207 System_parameter_list: 208 System_parameter_list ID 209 | ID 210 ; 211 212 Opt_list: 213 Opt_list COMMA Option 214 | 215 Option 216 ; 217 218 NoOpt_list: 219 NoOpt_list COMMA NoOption 220 | 221 NoOption 222 ; 223 Option: 224 Save_id { 225 newopt(&opt, $1, NULL, 0, 1); 226 if (strchr($1, '=') != NULL) 227 errx(1, "%s:%d: The `=' in options should not be " 228 "quoted", yyfile, yyline); 229 } | 230 Save_id EQUALS Opt_value { 231 newopt(&opt, $1, $3, 0, 1); 232 } ; 233 234 NoOption: 235 Save_id { 236 rmopt_schedule(&opt, $1); 237 }; 238 239 Opt_value: 240 ID { $$ = $1; } | 241 NUMBER { 242 char buf[80]; 243 244 (void) snprintf(buf, sizeof(buf), "%d", $1); 245 $$ = ns(buf); 246 } ; 247 248 Save_id: 249 ID { $$ = $1; } 250 ; 251 252 Mkopt_list: 253 Mkopt_list COMMA Mkoption 254 | 255 Mkoption 256 ; 257 258 Mkoption: 259 Save_id { newopt(&mkopt, $1, ns(""), 0, 0); } | 260 Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0, 0); } | 261 Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0, 0); } | 262 Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1, 0); } ; 263 264 Dev: 265 ID { $$ = $1; } 266 ; 267 268 Device_spec: 269 DEVICE Dev_list 270 | 271 NODEVICE NoDev_list 272 ; 273 274 Dev_list: 275 Dev_list COMMA Device 276 | 277 Device 278 ; 279 280 NoDev_list: 281 NoDev_list COMMA NoDevice 282 | 283 NoDevice 284 ; 285 286 Device: 287 Dev { 288 newopt(&opt, devopt($1), ns("1"), 0, 0); 289 /* and the device part */ 290 newdev($1); 291 } 292 293 NoDevice: 294 Dev { 295 char *s = devopt($1); 296 297 rmopt_schedule(&opt, s); 298 free(s); 299 /* and the device part */ 300 rmdev_schedule(&dtab, $1); 301 } ; 302 303 %% 304 305 void 306 yyerror(const char *s) 307 { 308 309 errx(1, "%s:%d: %s", yyfile, yyline + 1, s); 310 } 311 312 int 313 yywrap(void) 314 { 315 if (found_defaults) { 316 if (freopen(PREFIX, "r", stdin) == NULL) 317 err(2, "%s", PREFIX); 318 yyfile = PREFIX; 319 yyline = 0; 320 found_defaults = 0; 321 return 0; 322 } 323 return 1; 324 } 325 326 /* 327 * Add a new file to the list of files. 328 */ 329 static void 330 newfile(char *name) 331 { 332 struct files_name *nl; 333 334 nl = (struct files_name *) calloc(1, sizeof *nl); 335 if (nl == NULL) 336 err(EXIT_FAILURE, "calloc"); 337 nl->f_name = name; 338 STAILQ_INSERT_TAIL(&fntab, nl, f_next); 339 } 340 341 static void 342 newenvvar(char *name, bool is_file) 343 { 344 struct envvar *envvar; 345 346 envvar = (struct envvar *)calloc(1, sizeof (struct envvar)); 347 if (envvar == NULL) 348 err(EXIT_FAILURE, "calloc"); 349 envvar->env_str = name; 350 envvar->env_is_file = is_file; 351 STAILQ_INSERT_HEAD(&envvars, envvar, envvar_next); 352 } 353 354 /* 355 * Find a device in the list of devices. 356 */ 357 static struct device * 358 finddev(struct device_head *dlist, char *name) 359 { 360 struct device *dp; 361 362 STAILQ_FOREACH(dp, dlist, d_next) 363 if (eq(dp->d_name, name)) 364 return (dp); 365 366 return (NULL); 367 } 368 369 /* 370 * Add a device to the list of devices. 371 */ 372 static void 373 newdev(char *name) 374 { 375 struct device *np, *dp; 376 377 if ((dp = finddev(&dtab, name)) != NULL) { 378 if (strcmp(dp->yyfile, yyfile) == 0) 379 fprintf(stderr, 380 "WARNING: duplicate device `%s' encountered in %s\n", 381 name, yyfile); 382 return; 383 } 384 385 np = (struct device *) calloc(1, sizeof *np); 386 if (np == NULL) 387 err(EXIT_FAILURE, "calloc"); 388 np->d_name = name; 389 np->yyfile = strdup(yyfile); 390 STAILQ_INSERT_TAIL(&dtab, np, d_next); 391 } 392 393 /* 394 * Schedule a device to removal. 395 */ 396 static void 397 rmdev_schedule(struct device_head *dh, char *name) 398 { 399 struct device *dp; 400 401 dp = finddev(dh, name); 402 if (dp != NULL) { 403 STAILQ_REMOVE(dh, dp, device, d_next); 404 free(dp->yyfile); 405 free(dp->d_name); 406 free(dp); 407 } 408 } 409 410 /* 411 * Find an option in the list of options. 412 */ 413 static struct opt * 414 findopt(struct opt_head *list, char *name) 415 { 416 struct opt *op; 417 418 SLIST_FOREACH(op, list, op_next) 419 if (eq(op->op_name, name)) 420 return (op); 421 422 return (NULL); 423 } 424 425 /* 426 * Add an option to the list of options. 427 */ 428 static void 429 newopt(struct opt_head *list, char *name, char *value, int append, int dupe) 430 { 431 struct opt *op, *op2; 432 433 /* 434 * Ignore inclusions listed explicitly for configuration files. 435 */ 436 if (eq(name, OPT_AUTOGEN)) { 437 incignore = 1; 438 return; 439 } 440 441 op2 = findopt(list, name); 442 if (op2 != NULL && !append && !dupe) { 443 if (strcmp(op2->yyfile, yyfile) == 0) 444 fprintf(stderr, 445 "WARNING: duplicate option `%s' encountered.\n", name); 446 return; 447 } 448 449 op = (struct opt *)calloc(1, sizeof (struct opt)); 450 if (op == NULL) 451 err(EXIT_FAILURE, "calloc"); 452 op->op_name = name; 453 op->op_ownfile = 0; 454 op->op_value = value; 455 op->yyfile = strdup(yyfile); 456 if (op2 != NULL) { 457 if (append) { 458 while (SLIST_NEXT(op2, op_append) != NULL) 459 op2 = SLIST_NEXT(op2, op_append); 460 SLIST_NEXT(op2, op_append) = op; 461 } else { 462 while (SLIST_NEXT(op2, op_next) != NULL) 463 op2 = SLIST_NEXT(op2, op_next); 464 SLIST_NEXT(op2, op_next) = op; 465 } 466 } else 467 SLIST_INSERT_HEAD(list, op, op_next); 468 } 469 470 /* 471 * Remove an option from the list of options. 472 */ 473 static void 474 rmopt_schedule(struct opt_head *list, char *name) 475 { 476 struct opt *op; 477 478 while ((op = findopt(list, name)) != NULL) { 479 SLIST_REMOVE(list, op, opt, op_next); 480 free(op->yyfile); 481 free(op->op_name); 482 free(op); 483 } 484 } 485