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 PROFILE 22 %token OPTIONS 23 %token NOOPTION 24 %token MAKEOPTIONS 25 %token NOMAKEOPTION 26 %token SEMICOLON 27 %token INCLUDE 28 %token FILES 29 30 %token <str> ENVLINE 31 %token <str> ID 32 %token <val> NUMBER 33 34 %type <str> Save_id 35 %type <str> Opt_value 36 %type <str> Dev 37 %token <str> PATH 38 39 %{ 40 41 /*- 42 * SPDX-License-Identifier: BSD-3-Clause 43 * 44 * Copyright (c) 1988, 1993 45 * The Regents of the University of California. All rights reserved. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)config.y 8.1 (Berkeley) 6/6/93 72 * $FreeBSD$ 73 */ 74 75 #include <assert.h> 76 #include <ctype.h> 77 #include <err.h> 78 #include <stdio.h> 79 #include <string.h> 80 81 #include "config.h" 82 83 struct device_head dtab; 84 char *ident; 85 char *env; 86 int yyline; 87 const char *yyfile; 88 struct file_list_head ftab; 89 struct files_name_head fntab; 90 char errbuf[80]; 91 int maxusers; 92 93 #define ns(s) strdup(s) 94 int include(const char *, int); 95 void yyerror(const char *s); 96 int yywrap(void); 97 98 static void newdev(char *name); 99 static void newfile(char *name); 100 static void newenvvar(char *name, bool is_file); 101 static void rmdev_schedule(struct device_head *dh, char *name); 102 static void newopt(struct opt_head *list, char *name, char *value, int append, int dupe); 103 static void rmopt_schedule(struct opt_head *list, char *name); 104 105 static char * 106 devopt(char *dev) 107 { 108 char *ret = malloc(strlen(dev) + 5); 109 110 sprintf(ret, "DEV_%s", dev); 111 raisestr(ret); 112 return ret; 113 } 114 115 %} 116 %% 117 Configuration: 118 Many_specs 119 ; 120 121 Many_specs: 122 Many_specs Spec 123 | 124 /* lambda */ 125 ; 126 127 Spec: 128 Device_spec SEMICOLON 129 | 130 Config_spec SEMICOLON 131 | 132 INCLUDE PATH SEMICOLON { 133 if (incignore == 0) 134 include($2, 0); 135 }; 136 | 137 INCLUDE ID SEMICOLON { 138 if (incignore == 0) 139 include($2, 0); 140 }; 141 | 142 FILES ID SEMICOLON { newfile($2); }; 143 | 144 SEMICOLON 145 | 146 error SEMICOLON 147 ; 148 149 Config_spec: 150 ARCH Save_id { 151 if (machinename != NULL && !eq($2, machinename)) 152 errx(1, "%s:%d: only one machine directive is allowed", 153 yyfile, yyline); 154 machinename = $2; 155 machinearch = $2; 156 } | 157 ARCH Save_id Save_id { 158 if (machinename != NULL && 159 !(eq($2, machinename) && eq($3, machinearch))) 160 errx(1, "%s:%d: only one machine directive is allowed", 161 yyfile, yyline); 162 machinename = $2; 163 machinearch = $3; 164 } | 165 CPU Save_id { 166 struct cputype *cp = 167 (struct cputype *)calloc(1, sizeof (struct cputype)); 168 if (cp == NULL) 169 err(EXIT_FAILURE, "calloc"); 170 cp->cpu_name = $2; 171 SLIST_INSERT_HEAD(&cputype, cp, cpu_next); 172 } | 173 NOCPU Save_id { 174 struct cputype *cp, *cp2; 175 SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) { 176 if (eq(cp->cpu_name, $2)) { 177 SLIST_REMOVE(&cputype, cp, cputype, cpu_next); 178 free(cp); 179 } 180 } 181 } | 182 OPTIONS Opt_list 183 | 184 NOOPTION NoOpt_list | 185 MAKEOPTIONS Mkopt_list 186 | 187 NOMAKEOPTION Save_id { rmopt_schedule(&mkopt, $2); } | 188 IDENT ID { ident = $2; } | 189 System_spec 190 | 191 MAXUSERS NUMBER { maxusers = $2; } | 192 PROFILE NUMBER { profiling = $2; } | 193 ENV ID { newenvvar($2, true); } | 194 ENVVAR ENVLINE { newenvvar($2, false); } | 195 HINTS ID { 196 struct hint *hint; 197 198 hint = (struct hint *)calloc(1, sizeof (struct hint)); 199 if (hint == NULL) 200 err(EXIT_FAILURE, "calloc"); 201 hint->hint_name = $2; 202 STAILQ_INSERT_HEAD(&hints, hint, hint_next); 203 } 204 205 System_spec: 206 CONFIG System_id System_parameter_list { 207 errx(1, "%s:%d: root/dump/swap specifications obsolete", 208 yyfile, yyline); 209 } 210 | 211 CONFIG System_id 212 ; 213 214 System_id: 215 Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0, 0); }; 216 217 System_parameter_list: 218 System_parameter_list ID 219 | ID 220 ; 221 222 Opt_list: 223 Opt_list COMMA Option 224 | 225 Option 226 ; 227 228 NoOpt_list: 229 NoOpt_list COMMA NoOption 230 | 231 NoOption 232 ; 233 Option: 234 Save_id { 235 newopt(&opt, $1, NULL, 0, 1); 236 if (strchr($1, '=') != NULL) 237 errx(1, "%s:%d: The `=' in options should not be " 238 "quoted", yyfile, yyline); 239 } | 240 Save_id EQUALS Opt_value { 241 newopt(&opt, $1, $3, 0, 1); 242 } ; 243 244 NoOption: 245 Save_id { 246 rmopt_schedule(&opt, $1); 247 }; 248 249 Opt_value: 250 ID { $$ = $1; } | 251 NUMBER { 252 char buf[80]; 253 254 (void) snprintf(buf, sizeof(buf), "%d", $1); 255 $$ = ns(buf); 256 } ; 257 258 Save_id: 259 ID { $$ = $1; } 260 ; 261 262 Mkopt_list: 263 Mkopt_list COMMA Mkoption 264 | 265 Mkoption 266 ; 267 268 Mkoption: 269 Save_id { newopt(&mkopt, $1, ns(""), 0, 0); } | 270 Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0, 0); } | 271 Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0, 0); } | 272 Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1, 0); } ; 273 274 Dev: 275 ID { $$ = $1; } 276 ; 277 278 Device_spec: 279 DEVICE Dev_list 280 | 281 NODEVICE NoDev_list 282 ; 283 284 Dev_list: 285 Dev_list COMMA Device 286 | 287 Device 288 ; 289 290 NoDev_list: 291 NoDev_list COMMA NoDevice 292 | 293 NoDevice 294 ; 295 296 Device: 297 Dev { 298 newopt(&opt, devopt($1), ns("1"), 0, 0); 299 /* and the device part */ 300 newdev($1); 301 } 302 303 NoDevice: 304 Dev { 305 char *s = devopt($1); 306 307 rmopt_schedule(&opt, s); 308 free(s); 309 /* and the device part */ 310 rmdev_schedule(&dtab, $1); 311 } ; 312 313 %% 314 315 void 316 yyerror(const char *s) 317 { 318 319 errx(1, "%s:%d: %s", yyfile, yyline + 1, s); 320 } 321 322 int 323 yywrap(void) 324 { 325 if (found_defaults) { 326 if (freopen(PREFIX, "r", stdin) == NULL) 327 err(2, "%s", PREFIX); 328 yyfile = PREFIX; 329 yyline = 0; 330 found_defaults = 0; 331 return 0; 332 } 333 return 1; 334 } 335 336 /* 337 * Add a new file to the list of files. 338 */ 339 static void 340 newfile(char *name) 341 { 342 struct files_name *nl; 343 344 nl = (struct files_name *) calloc(1, sizeof *nl); 345 if (nl == NULL) 346 err(EXIT_FAILURE, "calloc"); 347 nl->f_name = name; 348 STAILQ_INSERT_TAIL(&fntab, nl, f_next); 349 } 350 351 static void 352 newenvvar(char *name, bool is_file) 353 { 354 struct envvar *envvar; 355 356 envvar = (struct envvar *)calloc(1, sizeof (struct envvar)); 357 if (envvar == NULL) 358 err(EXIT_FAILURE, "calloc"); 359 envvar->env_str = name; 360 envvar->env_is_file = is_file; 361 STAILQ_INSERT_HEAD(&envvars, envvar, envvar_next); 362 } 363 364 /* 365 * Find a device in the list of devices. 366 */ 367 static struct device * 368 finddev(struct device_head *dlist, char *name) 369 { 370 struct device *dp; 371 372 STAILQ_FOREACH(dp, dlist, d_next) 373 if (eq(dp->d_name, name)) 374 return (dp); 375 376 return (NULL); 377 } 378 379 /* 380 * Add a device to the list of devices. 381 */ 382 static void 383 newdev(char *name) 384 { 385 struct device *np, *dp; 386 387 if ((dp = finddev(&dtab, name)) != NULL) { 388 if (strcmp(dp->yyfile, yyfile) == 0) 389 fprintf(stderr, 390 "WARNING: duplicate device `%s' encountered in %s\n", 391 name, yyfile); 392 return; 393 } 394 395 np = (struct device *) calloc(1, sizeof *np); 396 if (np == NULL) 397 err(EXIT_FAILURE, "calloc"); 398 np->d_name = name; 399 np->yyfile = strdup(yyfile); 400 STAILQ_INSERT_TAIL(&dtab, np, d_next); 401 } 402 403 /* 404 * Schedule a device to removal. 405 */ 406 static void 407 rmdev_schedule(struct device_head *dh, char *name) 408 { 409 struct device *dp; 410 411 dp = finddev(dh, name); 412 if (dp != NULL) { 413 STAILQ_REMOVE(dh, dp, device, d_next); 414 free(dp->yyfile); 415 free(dp->d_name); 416 free(dp); 417 } 418 } 419 420 /* 421 * Find an option in the list of options. 422 */ 423 static struct opt * 424 findopt(struct opt_head *list, char *name) 425 { 426 struct opt *op; 427 428 SLIST_FOREACH(op, list, op_next) 429 if (eq(op->op_name, name)) 430 return (op); 431 432 return (NULL); 433 } 434 435 /* 436 * Add an option to the list of options. 437 */ 438 static void 439 newopt(struct opt_head *list, char *name, char *value, int append, int dupe) 440 { 441 struct opt *op, *op2; 442 443 /* 444 * Ignore inclusions listed explicitly for configuration files. 445 */ 446 if (eq(name, OPT_AUTOGEN)) { 447 incignore = 1; 448 return; 449 } 450 451 op2 = findopt(list, name); 452 if (op2 != NULL && !append && !dupe) { 453 if (strcmp(op2->yyfile, yyfile) == 0) 454 fprintf(stderr, 455 "WARNING: duplicate option `%s' encountered.\n", name); 456 return; 457 } 458 459 op = (struct opt *)calloc(1, sizeof (struct opt)); 460 if (op == NULL) 461 err(EXIT_FAILURE, "calloc"); 462 op->op_name = name; 463 op->op_ownfile = 0; 464 op->op_value = value; 465 op->yyfile = strdup(yyfile); 466 if (op2 != NULL) { 467 if (append) { 468 while (SLIST_NEXT(op2, op_append) != NULL) 469 op2 = SLIST_NEXT(op2, op_append); 470 SLIST_NEXT(op2, op_append) = op; 471 } else { 472 while (SLIST_NEXT(op2, op_next) != NULL) 473 op2 = SLIST_NEXT(op2, op_next); 474 SLIST_NEXT(op2, op_next) = op; 475 } 476 } else 477 SLIST_INSERT_HEAD(list, op, op_next); 478 } 479 480 /* 481 * Remove an option from the list of options. 482 */ 483 static void 484 rmopt_schedule(struct opt_head *list, char *name) 485 { 486 struct opt *op; 487 488 while ((op = findopt(list, name)) != NULL) { 489 SLIST_REMOVE(list, op, opt, op_next); 490 free(op->yyfile); 491 free(op->op_name); 492 free(op); 493 } 494 } 495