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 71 #include <assert.h> 72 #include <ctype.h> 73 #include <err.h> 74 #include <stdio.h> 75 #include <string.h> 76 77 #include "config.h" 78 79 struct device_head dtab; 80 char *ident; 81 char *env; 82 int yyline; 83 const char *yyfile; 84 struct file_list_head ftab; 85 struct files_name_head fntab; 86 char errbuf[80]; 87 int maxusers; 88 89 #define ns(s) strdup(s) 90 int include(const char *, int); 91 void yyerror(const char *s); 92 int yywrap(void); 93 94 static void newdev(char *name); 95 static void newfile(char *name); 96 static void newenvvar(char *name, bool is_file); 97 static void rmdev_schedule(struct device_head *dh, char *name); 98 static void newopt(struct opt_head *list, char *name, char *value, int append, int dupe); 99 static void rmopt_schedule(struct opt_head *list, char *name); 100 101 static char * 102 devopt(char *dev) 103 { 104 char *ret = malloc(strlen(dev) + 5); 105 106 sprintf(ret, "DEV_%s", dev); 107 raisestr(ret); 108 return ret; 109 } 110 111 %} 112 %% 113 Configuration: 114 Many_specs 115 ; 116 117 Many_specs: 118 Many_specs Spec 119 | 120 /* lambda */ 121 ; 122 123 Spec: 124 Device_spec SEMICOLON 125 | 126 Config_spec SEMICOLON 127 | 128 INCLUDE PATH SEMICOLON { 129 if (incignore == 0) 130 include($2, 0); 131 }; 132 | 133 INCLUDE ID SEMICOLON { 134 if (incignore == 0) 135 include($2, 0); 136 }; 137 | 138 FILES ID SEMICOLON { newfile($2); }; 139 | 140 SEMICOLON 141 | 142 error SEMICOLON 143 ; 144 145 Config_spec: 146 ARCH Save_id { 147 if (machinename != NULL && !eq($2, machinename)) 148 errx(1, "%s:%d: only one machine directive is allowed", 149 yyfile, yyline); 150 machinename = $2; 151 machinearch = $2; 152 } | 153 ARCH Save_id Save_id { 154 /* 155 * Allow the machinearch to change with a second machine directive, 156 * but still enforce no changes to the machinename. 157 */ 158 if (machinename != NULL && !eq($2, machinename)) 159 errx(1, "%s:%d: only one machine directive is allowed", 160 yyfile, yyline); 161 machinename = $2; 162 machinearch = $3; 163 } | 164 CPU Save_id { 165 struct cputype *cp = 166 (struct cputype *)calloc(1, sizeof (struct cputype)); 167 if (cp == NULL) 168 err(EXIT_FAILURE, "calloc"); 169 cp->cpu_name = $2; 170 SLIST_INSERT_HEAD(&cputype, cp, cpu_next); 171 } | 172 NOCPU Save_id { 173 struct cputype *cp, *cp2; 174 SLIST_FOREACH_SAFE(cp, &cputype, cpu_next, cp2) { 175 if (eq(cp->cpu_name, $2)) { 176 SLIST_REMOVE(&cputype, cp, cputype, cpu_next); 177 free(cp); 178 } 179 } 180 } | 181 OPTIONS Opt_list 182 | 183 NOOPTION NoOpt_list | 184 MAKEOPTIONS Mkopt_list 185 | 186 NOMAKEOPTION Save_id { rmopt_schedule(&mkopt, $2); } | 187 IDENT ID { ident = $2; } | 188 MAXUSERS NUMBER { maxusers = $2; } | 189 ENV ID { newenvvar($2, true); } | 190 ENVVAR ENVLINE { newenvvar($2, false); } | 191 HINTS ID { 192 struct hint *hint; 193 194 hint = (struct hint *)calloc(1, sizeof (struct hint)); 195 if (hint == NULL) 196 err(EXIT_FAILURE, "calloc"); 197 hint->hint_name = $2; 198 STAILQ_INSERT_HEAD(&hints, hint, hint_next); 199 } 200 201 System_id: 202 Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0, 0); }; 203 204 System_parameter_list: 205 System_parameter_list ID 206 | ID 207 ; 208 209 Opt_list: 210 Opt_list COMMA Option 211 | 212 Option 213 ; 214 215 NoOpt_list: 216 NoOpt_list COMMA NoOption 217 | 218 NoOption 219 ; 220 Option: 221 Save_id { 222 newopt(&opt, $1, NULL, 0, 1); 223 if (strchr($1, '=') != NULL) 224 errx(1, "%s:%d: The `=' in options should not be " 225 "quoted", yyfile, yyline); 226 } | 227 Save_id EQUALS Opt_value { 228 newopt(&opt, $1, $3, 0, 1); 229 } ; 230 231 NoOption: 232 Save_id { 233 rmopt_schedule(&opt, $1); 234 }; 235 236 Opt_value: 237 ID { $$ = $1; } | 238 NUMBER { 239 char buf[80]; 240 241 (void) snprintf(buf, sizeof(buf), "%d", $1); 242 $$ = ns(buf); 243 } ; 244 245 Save_id: 246 ID { $$ = $1; } 247 ; 248 249 Mkopt_list: 250 Mkopt_list COMMA Mkoption 251 | 252 Mkoption 253 ; 254 255 Mkoption: 256 Save_id { newopt(&mkopt, $1, ns(""), 0, 0); } | 257 Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0, 0); } | 258 Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0, 0); } | 259 Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1, 0); } ; 260 261 Dev: 262 ID { $$ = $1; } 263 ; 264 265 Device_spec: 266 DEVICE Dev_list 267 | 268 NODEVICE NoDev_list 269 ; 270 271 Dev_list: 272 Dev_list COMMA Device 273 | 274 Device 275 ; 276 277 NoDev_list: 278 NoDev_list COMMA NoDevice 279 | 280 NoDevice 281 ; 282 283 Device: 284 Dev { 285 newopt(&opt, devopt($1), ns("1"), 0, 0); 286 /* and the device part */ 287 newdev($1); 288 } 289 290 NoDevice: 291 Dev { 292 char *s = devopt($1); 293 294 rmopt_schedule(&opt, s); 295 free(s); 296 /* and the device part */ 297 rmdev_schedule(&dtab, $1); 298 } ; 299 300 %% 301 302 void 303 yyerror(const char *s) 304 { 305 306 errx(1, "%s:%d: %s", yyfile, yyline + 1, s); 307 } 308 309 int 310 yywrap(void) 311 { 312 if (found_defaults) { 313 if (freopen(PREFIX, "r", stdin) == NULL) 314 err(2, "%s", PREFIX); 315 yyfile = PREFIX; 316 yyline = 0; 317 found_defaults = 0; 318 return 0; 319 } 320 return 1; 321 } 322 323 /* 324 * Add a new file to the list of files. 325 */ 326 static void 327 newfile(char *name) 328 { 329 struct files_name *nl; 330 331 nl = (struct files_name *) calloc(1, sizeof *nl); 332 if (nl == NULL) 333 err(EXIT_FAILURE, "calloc"); 334 nl->f_name = name; 335 STAILQ_INSERT_TAIL(&fntab, nl, f_next); 336 } 337 338 static void 339 newenvvar(char *name, bool is_file) 340 { 341 struct envvar *envvar; 342 343 envvar = (struct envvar *)calloc(1, sizeof (struct envvar)); 344 if (envvar == NULL) 345 err(EXIT_FAILURE, "calloc"); 346 envvar->env_str = name; 347 envvar->env_is_file = is_file; 348 STAILQ_INSERT_HEAD(&envvars, envvar, envvar_next); 349 } 350 351 /* 352 * Find a device in the list of devices. 353 */ 354 static struct device * 355 finddev(struct device_head *dlist, char *name) 356 { 357 struct device *dp; 358 359 STAILQ_FOREACH(dp, dlist, d_next) 360 if (eq(dp->d_name, name)) 361 return (dp); 362 363 return (NULL); 364 } 365 366 /* 367 * Add a device to the list of devices. 368 */ 369 static void 370 newdev(char *name) 371 { 372 struct device *np, *dp; 373 374 if ((dp = finddev(&dtab, name)) != NULL) { 375 if (strcmp(dp->yyfile, yyfile) == 0) 376 fprintf(stderr, 377 "WARNING: duplicate device `%s' encountered in %s\n", 378 name, yyfile); 379 return; 380 } 381 382 np = (struct device *) calloc(1, sizeof *np); 383 if (np == NULL) 384 err(EXIT_FAILURE, "calloc"); 385 np->d_name = name; 386 np->yyfile = strdup(yyfile); 387 STAILQ_INSERT_TAIL(&dtab, np, d_next); 388 } 389 390 /* 391 * Schedule a device to removal. 392 */ 393 static void 394 rmdev_schedule(struct device_head *dh, char *name) 395 { 396 struct device *dp; 397 398 dp = finddev(dh, name); 399 if (dp != NULL) { 400 STAILQ_REMOVE(dh, dp, device, d_next); 401 free(dp->yyfile); 402 free(dp->d_name); 403 free(dp); 404 } 405 } 406 407 /* 408 * Find an option in the list of options. 409 */ 410 static struct opt * 411 findopt(struct opt_head *list, char *name) 412 { 413 struct opt *op; 414 415 SLIST_FOREACH(op, list, op_next) 416 if (eq(op->op_name, name)) 417 return (op); 418 419 return (NULL); 420 } 421 422 /* 423 * Add an option to the list of options. 424 */ 425 static void 426 newopt(struct opt_head *list, char *name, char *value, int append, int dupe) 427 { 428 struct opt *op, *op2; 429 430 /* 431 * Ignore inclusions listed explicitly for configuration files. 432 */ 433 if (eq(name, OPT_AUTOGEN)) { 434 incignore = 1; 435 return; 436 } 437 438 op2 = findopt(list, name); 439 if (op2 != NULL && !append && !dupe) { 440 if (strcmp(op2->yyfile, yyfile) == 0) 441 fprintf(stderr, 442 "WARNING: duplicate option `%s' encountered.\n", name); 443 return; 444 } 445 446 op = (struct opt *)calloc(1, sizeof (struct opt)); 447 if (op == NULL) 448 err(EXIT_FAILURE, "calloc"); 449 op->op_name = name; 450 op->op_ownfile = 0; 451 op->op_value = value; 452 op->yyfile = strdup(yyfile); 453 if (op2 != NULL) { 454 if (append) { 455 while (SLIST_NEXT(op2, op_append) != NULL) 456 op2 = SLIST_NEXT(op2, op_append); 457 SLIST_NEXT(op2, op_append) = op; 458 } else { 459 while (SLIST_NEXT(op2, op_next) != NULL) 460 op2 = SLIST_NEXT(op2, op_next); 461 SLIST_NEXT(op2, op_next) = op; 462 } 463 } else 464 SLIST_INSERT_HEAD(list, op, op_next); 465 } 466 467 /* 468 * Remove an option from the list of options. 469 */ 470 static void 471 rmopt_schedule(struct opt_head *list, char *name) 472 { 473 struct opt *op; 474 475 while ((op = findopt(list, name)) != NULL) { 476 SLIST_REMOVE(list, op, opt, op_next); 477 free(op->yyfile); 478 free(op->op_name); 479 free(op); 480 } 481 } 482