1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)main.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.sbin/config/main.c,v 1.37.2.3 2001/06/13 00:25:53 cg Exp $ 36 * $DragonFly: src/usr.sbin/config/main.c,v 1.24 2008/07/11 09:28:20 thomas Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <sys/file.h> 42 #include <sys/mman.h> 43 #include <sys/param.h> 44 #include <ctype.h> 45 #include <err.h> 46 #include <stdio.h> 47 #include <dirent.h> 48 #include <sysexits.h> 49 #include <unistd.h> 50 #include "y.tab.h" 51 #include "config.h" 52 53 #ifndef TRUE 54 #define TRUE (1) 55 #endif 56 57 #ifndef FALSE 58 #define FALSE (0) 59 #endif 60 61 #define CDIR "../compile/" 62 63 char * PREFIX; 64 char destdir[MAXPATHLEN]; 65 char srcdir[MAXPATHLEN]; 66 67 static int no_config_clobber = TRUE; 68 int debugging; 69 int profiling; 70 71 static void configfile(void); 72 static void get_srcdir(void); 73 static void usage(void); 74 75 /* 76 * Config builds a set of files for building a UNIX 77 * system given a description of the desired system. 78 */ 79 int 80 main(int argc, char *argv[]) 81 { 82 struct stat buf; 83 int ch, len; 84 unsigned int i; 85 char *p; 86 char linksrc[64], linkdest[MAXPATHLEN]; 87 static const char *emus[] = { "linux" }; 88 89 while ((ch = getopt(argc, argv, "d:gpr")) != -1) 90 switch (ch) { 91 case 'd': 92 if (*destdir == '\0') 93 strlcpy(destdir, optarg, sizeof(destdir)); 94 else 95 errx(2, "directory already set"); 96 break; 97 case 'g': 98 debugging++; 99 break; 100 case 'p': 101 profiling++; 102 break; 103 case 'r': 104 no_config_clobber = FALSE; 105 break; 106 case '?': 107 default: 108 usage(); 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (argc != 1) 114 usage(); 115 116 if (freopen(PREFIX = *argv, "r", stdin) == NULL) 117 err(2, "%s", PREFIX); 118 119 if (*destdir != '\0') { 120 len = strlen(destdir); 121 while (len > 1 && destdir[len - 1] == '/') 122 destdir[--len] = '\0'; 123 get_srcdir(); 124 } else { 125 strlcpy(destdir, CDIR, sizeof(destdir)); 126 strlcat(destdir, PREFIX, sizeof(destdir)); 127 } 128 129 p = path(NULL); 130 if (stat(p, &buf)) { 131 if (mkdir(p, 0777)) 132 err(2, "%s", p); 133 } 134 else if ((buf.st_mode & S_IFMT) != S_IFDIR) { 135 errx(2, "%s isn't a directory", p); 136 } 137 else if (!no_config_clobber) { 138 char tmp[strlen(p) + 8]; 139 140 fprintf(stderr, "Removing old directory %s: ", p); 141 fflush(stderr); 142 snprintf(tmp, sizeof(tmp), "rm -rf %s", p); 143 if (system(tmp)) { 144 fprintf(stderr, "Failed!\n"); 145 err(2, "%s", tmp); 146 } 147 fprintf(stderr, "Done.\n"); 148 if (mkdir(p, 0777)) 149 err(2, "%s", p); 150 } 151 152 dtab = NULL; 153 if (yyparse()) 154 exit(3); 155 if (platformname == NULL) { 156 printf("Specify platform architecture, e.g. 'platform pc32'\n"); 157 exit(1); 158 } 159 if (machinename == NULL) { 160 printf("Specify machine architecture, e.g. 'machine i386'\n"); 161 exit(1); 162 } 163 if (machinearchname == NULL) { 164 printf("Specify cpu architecture, e.g. 'machine_arch i386'\n"); 165 exit(1); 166 } 167 newbus_ioconf(); 168 169 /* 170 * "machine" points into platform/<PLATFORM>/include 171 */ 172 if (*srcdir == '\0') 173 snprintf(linkdest, sizeof(linkdest), "../../platform/%s/include", 174 platformname); 175 else 176 snprintf(linkdest, sizeof(linkdest), "%s/platform/%s/include", 177 srcdir, platformname); 178 symlink(linkdest, path("machine")); 179 180 /* 181 * "machine_base" points into platform/<PLATFORM> 182 */ 183 if (*srcdir == '\0') 184 snprintf(linkdest, sizeof(linkdest), "../../platform/%s", 185 platformname); 186 else 187 snprintf(linkdest, sizeof(linkdest), "%s/platform/%s", 188 srcdir, platformname); 189 symlink(linkdest, path("machine_base")); 190 191 /* 192 * "cpu" points to cpu/<MACHINE_ARCH>/include 193 */ 194 if (*srcdir == '\0') 195 snprintf(linkdest, sizeof(linkdest), 196 "../../cpu/%s/include", machinearchname); 197 else 198 snprintf(linkdest, sizeof(linkdest), 199 "%s/cpu/%s/include", srcdir, machinearchname); 200 symlink(linkdest, path("cpu")); 201 202 /* 203 * "cpu_base" points to cpu/<MACHINE_ARCH> 204 */ 205 if (*srcdir == '\0') 206 snprintf(linkdest, sizeof(linkdest), "../../cpu/%s", 207 machinearchname); 208 else 209 snprintf(linkdest, sizeof(linkdest), "%s/cpu/%s", 210 srcdir, machinearchname); 211 symlink(linkdest, path("cpu_base")); 212 213 /* 214 * XXX check directory structure for architecture subdirectories and 215 * create the symlinks automatically XXX 216 */ 217 if (*srcdir == '\0') 218 snprintf(linkdest, sizeof(linkdest), 219 "../../../../../net/i4b/include/%s", 220 machinearchname); 221 else 222 snprintf(linkdest, sizeof(linkdest), "%s/net/i4b/include/%s", 223 srcdir, machinearchname); 224 mkdir(path("net"), 0755); 225 mkdir(path("net/i4b"), 0755); 226 mkdir(path("net/i4b/include"), 0755); 227 symlink(linkdest, path("net/i4b/include/machine")); 228 229 for (i = 0; i < sizeof(emus) / sizeof(emus[0]); ++i) { 230 if (*srcdir == 0) { 231 snprintf(linkdest, sizeof(linkdest), 232 "../../emulation/%s/%s", 233 emus[i], machinearchname); 234 } else { 235 snprintf(linkdest, sizeof(linkdest), 236 "%s/emulation/%s/%s", 237 srcdir, emus[i], machinearchname); 238 } 239 snprintf(linksrc, sizeof(linksrc), "arch_%s", emus[i]); 240 symlink(linkdest, path(linksrc)); 241 } 242 243 options(); /* make options .h files */ 244 makefile(); /* build Makefile */ 245 headers(); /* make a lot of .h files */ 246 configfile(); /* put config file into kernel*/ 247 printf("Kernel build directory is %s\n", p); 248 exit(EX_OK); 249 } 250 251 /* 252 * get_srcdir 253 * determine the root of the kernel source tree 254 * and save that in srcdir. 255 */ 256 static void 257 get_srcdir(void) 258 { 259 260 if (realpath("..", srcdir) == NULL) 261 errx(2, "Unable to find root of source tree"); 262 } 263 264 static void 265 usage(void) 266 { 267 268 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 269 exit(1); 270 } 271 272 /* 273 * get_word 274 * returns EOF on end of file 275 * NULL on end of line 276 * pointer to the word otherwise 277 */ 278 char * 279 get_word(FILE *fp) 280 { 281 static char line[80]; 282 int ch; 283 char *cp; 284 int escaped_nl = 0; 285 286 begin: 287 while ((ch = getc(fp)) != EOF) 288 if (ch != ' ' && ch != '\t') 289 break; 290 if (ch == EOF) 291 return((char *)EOF); 292 if (ch == '\\') { 293 escaped_nl = 1; 294 goto begin; 295 } 296 if (ch == '\n') { 297 if (escaped_nl) { 298 escaped_nl = 0; 299 goto begin; 300 } 301 else 302 return(NULL); 303 } 304 cp = line; 305 *cp++ = ch; 306 while ((ch = getc(fp)) != EOF) { 307 if (isspace(ch)) 308 break; 309 *cp++ = ch; 310 } 311 *cp = 0; 312 if (ch == EOF) 313 return((char *)EOF); 314 ungetc(ch, fp); 315 return(line); 316 } 317 318 /* 319 * get_quoted_word 320 * like get_word but will accept something in double or single quotes 321 * (to allow embedded spaces). 322 */ 323 char * 324 get_quoted_word(FILE *fp) 325 { 326 static char line[256]; 327 int ch; 328 char *cp; 329 int escaped_nl = 0; 330 331 begin: 332 while ((ch = getc(fp)) != EOF) 333 if (ch != ' ' && ch != '\t') 334 break; 335 if (ch == EOF) 336 return((char *)EOF); 337 if (ch == '\\') { 338 escaped_nl = 1; 339 goto begin; 340 } 341 if (ch == '\n') { 342 if (escaped_nl) { 343 escaped_nl = 0; 344 goto begin; 345 } 346 else 347 return(NULL); 348 } 349 cp = line; 350 if (ch == '"' || ch == '\'') { 351 int quote = ch; 352 353 while ((ch = getc(fp)) != EOF) { 354 if (ch == quote) 355 break; 356 if (ch == '\n') { 357 *cp = 0; 358 printf("config: missing quote reading `%s'\n", 359 line); 360 exit(2); 361 } 362 *cp++ = ch; 363 } 364 } else { 365 *cp++ = ch; 366 while ((ch = getc(fp)) != EOF) { 367 if (isspace(ch)) 368 break; 369 *cp++ = ch; 370 } 371 if (ch != EOF) 372 ungetc(ch, fp); 373 } 374 *cp = 0; 375 if (ch == EOF) 376 return((char *)EOF); 377 return(line); 378 } 379 380 /* 381 * prepend the path to a filename 382 */ 383 char * 384 path(const char *file) 385 { 386 char *cp; 387 388 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 389 strcpy(cp, destdir); 390 if (file != NULL) { 391 strcat(cp, "/"); 392 strcat(cp, file); 393 } 394 return(cp); 395 } 396 397 static void 398 configfile(void) 399 { 400 FILE *fi, *fo; 401 char *p; 402 int i; 403 404 fi = fopen(PREFIX, "r"); 405 if (fi == NULL) 406 err(2, "%s", PREFIX); 407 fo = fopen(p = path("config.c.new"), "w"); 408 if (fo == NULL) 409 err(2, "%s", p); 410 fprintf(fo, "#include \"opt_config.h\"\n"); 411 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 412 fprintf(fo, "/* Mark config as used, so gcc doesn't optimize it away. */\n"); 413 fprintf(fo, "#include <sys/types.h>\n"); 414 fprintf(fo, "__used\n"); 415 fprintf(fo, "static const char config[] = \"\\\n"); 416 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 417 while (EOF != (i = getc(fi))) { 418 if (i == '\n') { 419 fprintf(fo, "\\n\\\n___"); 420 } else if (i == '\"') { 421 fprintf(fo, "\\\""); 422 } else if (i == '\\') { 423 fprintf(fo, "\\\\"); 424 } else { 425 putc(i, fo); 426 } 427 } 428 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 429 fprintf(fo, "\";\n"); 430 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 431 fclose(fi); 432 fclose(fo); 433 moveifchanged(path("config.c.new"), path("config.c")); 434 } 435 436 /* 437 * moveifchanged -- 438 * compare two files; rename if changed. 439 */ 440 void 441 moveifchanged(const char *from_name, const char *to_name) 442 { 443 char *p, *q; 444 int changed; 445 size_t tsize; 446 struct stat from_sb, to_sb; 447 int from_fd, to_fd; 448 449 changed = 0; 450 451 if ((from_fd = open(from_name, O_RDONLY)) < 0) 452 err(EX_OSERR, "moveifchanged open(%s)", from_name); 453 454 if ((to_fd = open(to_name, O_RDONLY)) < 0) 455 changed++; 456 457 if (!changed && fstat(from_fd, &from_sb) < 0) 458 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 459 460 if (!changed && fstat(to_fd, &to_sb) < 0) 461 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 462 463 if (!changed && from_sb.st_size != to_sb.st_size) 464 changed++; 465 466 tsize = (size_t)from_sb.st_size; 467 468 if (!changed) { 469 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 470 #ifndef MAP_FAILED 471 #define MAP_FAILED ((caddr_t)-1) 472 #endif 473 if (p == MAP_FAILED) 474 err(EX_OSERR, "mmap %s", from_name); 475 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 476 if (q == MAP_FAILED) 477 err(EX_OSERR, "mmap %s", to_name); 478 479 changed = memcmp(p, q, tsize); 480 munmap(p, tsize); 481 munmap(q, tsize); 482 } 483 if (changed) { 484 if (rename(from_name, to_name) < 0) 485 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 486 } else { 487 if (unlink(from_name) < 0) 488 err(EX_OSERR, "unlink(%s)", from_name); 489 } 490 } 491