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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)main.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.sbin/config/main.c,v 1.37.2.3 2001/06/13 00:25:53 cg Exp $ 32 */ 33 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/file.h> 37 #include <sys/mman.h> 38 #include <sys/param.h> 39 #include <ctype.h> 40 #include <err.h> 41 #include <stdio.h> 42 #include <dirent.h> 43 #include <sysexits.h> 44 #include <unistd.h> 45 #include "y.tab.h" 46 #include "config.h" 47 48 #ifndef TRUE 49 #define TRUE (1) 50 #endif 51 52 #ifndef FALSE 53 #define FALSE (0) 54 #endif 55 56 #define CDIR "../compile/" 57 58 char * PREFIX; 59 char destdir[MAXPATHLEN]; 60 char srcdir[MAXPATHLEN]; 61 62 static int no_config_clobber = TRUE; 63 int debugging; 64 int profiling; 65 66 extern int yyparse(void); 67 static void configfile(void); 68 static void get_srcdir(void); 69 static void usage(void); 70 71 /* 72 * Config builds a set of files for building a UNIX 73 * system given a description of the desired system. 74 */ 75 int 76 main(int argc, char *argv[]) 77 { 78 struct stat buf; 79 int ch, len; 80 char *p; 81 char linkdest[MAXPATHLEN]; 82 #if 0 83 unsigned int i; 84 char linksrc[64]; 85 static const char *emus[] = { "linux" }; 86 #endif 87 88 while ((ch = getopt(argc, argv, "d:gpr")) != -1) 89 switch (ch) { 90 case 'd': 91 if (*destdir == '\0') 92 strlcpy(destdir, optarg, sizeof(destdir)); 93 else 94 errx(2, "directory already set"); 95 break; 96 case 'g': 97 debugging++; 98 break; 99 case 'p': 100 profiling++; 101 break; 102 case 'r': 103 no_config_clobber = FALSE; 104 break; 105 case '?': 106 default: 107 usage(); 108 } 109 argc -= optind; 110 argv += optind; 111 112 if (argc != 1) 113 usage(); 114 115 if (freopen(PREFIX = *argv, "r", stdin) == NULL) 116 err(2, "%s", PREFIX); 117 118 if (*destdir != '\0') { 119 len = strlen(destdir); 120 while (len > 1 && destdir[len - 1] == '/') 121 destdir[--len] = '\0'; 122 get_srcdir(); 123 } else { 124 strlcpy(destdir, CDIR, sizeof(destdir)); 125 strlcat(destdir, PREFIX, sizeof(destdir)); 126 } 127 128 p = path(NULL); 129 if (stat(p, &buf)) { 130 if (mkdir(p, 0777)) 131 err(2, "%s", p); 132 } 133 else if ((buf.st_mode & S_IFMT) != S_IFDIR) { 134 errx(2, "%s isn't a directory", p); 135 } 136 else if (!no_config_clobber) { 137 char tmp[strlen(p) + 8]; 138 139 fprintf(stderr, "Removing old directory %s: ", p); 140 fflush(stderr); 141 snprintf(tmp, sizeof(tmp), "rm -rf %s", p); 142 if (system(tmp)) { 143 fprintf(stderr, "Failed!\n"); 144 err(2, "%s", tmp); 145 } 146 fprintf(stderr, "Done.\n"); 147 if (mkdir(p, 0777)) 148 err(2, "%s", p); 149 } 150 151 dtab = NULL; 152 if (yyparse()) 153 exit(3); 154 if (platformname == NULL) { 155 printf("Specify platform architecture, e.g. 'platform pc64'\n"); 156 exit(1); 157 } 158 if (machinename == NULL) { 159 printf("Specify machine architecture, e.g. 'machine x86_64'\n"); 160 exit(1); 161 } 162 if (machinearchname == NULL) { 163 printf("Specify cpu architecture, e.g. 'machine_arch x86_64'\n"); 164 exit(1); 165 } 166 newbus_ioconf(); 167 168 /* 169 * "machine" points into platform/<PLATFORM>/include 170 */ 171 if (*srcdir == '\0') 172 snprintf(linkdest, sizeof(linkdest), "../../platform/%s/include", 173 platformname); 174 else 175 snprintf(linkdest, sizeof(linkdest), "%s/platform/%s/include", 176 srcdir, platformname); 177 symlink(linkdest, path("machine")); 178 179 /* 180 * "machine_base" points into platform/<PLATFORM> 181 */ 182 if (*srcdir == '\0') 183 snprintf(linkdest, sizeof(linkdest), "../../platform/%s", 184 platformname); 185 else 186 snprintf(linkdest, sizeof(linkdest), "%s/platform/%s", 187 srcdir, platformname); 188 symlink(linkdest, path("machine_base")); 189 190 /* 191 * "cpu" points to cpu/<MACHINE_ARCH>/include 192 */ 193 if (*srcdir == '\0') 194 snprintf(linkdest, sizeof(linkdest), 195 "../../cpu/%s/include", machinearchname); 196 else 197 snprintf(linkdest, sizeof(linkdest), 198 "%s/cpu/%s/include", srcdir, machinearchname); 199 symlink(linkdest, path("cpu")); 200 201 /* 202 * "cpu_base" points to cpu/<MACHINE_ARCH> 203 */ 204 if (*srcdir == '\0') 205 snprintf(linkdest, sizeof(linkdest), "../../cpu/%s", 206 machinearchname); 207 else 208 snprintf(linkdest, sizeof(linkdest), "%s/cpu/%s", 209 srcdir, machinearchname); 210 symlink(linkdest, path("cpu_base")); 211 212 /* 213 * XXX check directory structure for architecture subdirectories and 214 * create the symlinks automatically XXX 215 */ 216 #if 0 217 for (i = 0; i < sizeof(emus) / sizeof(emus[0]); ++i) { 218 if (*srcdir == 0) { 219 snprintf(linkdest, sizeof(linkdest), 220 "../../emulation/%s/%s", 221 emus[i], machinearchname); 222 } else { 223 snprintf(linkdest, sizeof(linkdest), 224 "%s/emulation/%s/%s", 225 srcdir, emus[i], machinearchname); 226 } 227 snprintf(linksrc, sizeof(linksrc), "arch_%s", emus[i]); 228 symlink(linkdest, path(linksrc)); 229 } 230 #endif 231 232 options(); /* make options .h files */ 233 makefile(); /* build Makefile */ 234 headers(); /* make a lot of .h files */ 235 configfile(); /* put config file into kernel*/ 236 printf("Kernel build directory is %s\n", p); 237 exit(EX_OK); 238 } 239 240 /* 241 * get_srcdir 242 * determine the root of the kernel source tree 243 * and save that in srcdir. 244 */ 245 static void 246 get_srcdir(void) 247 { 248 249 if (realpath("..", srcdir) == NULL) 250 errx(2, "Unable to find root of source tree"); 251 } 252 253 static void 254 usage(void) 255 { 256 257 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 258 exit(1); 259 } 260 261 /* 262 * get_word 263 * returns EOF on end of file 264 * NULL on end of line 265 * pointer to the word otherwise 266 */ 267 char * 268 get_word(FILE *fp) 269 { 270 static char line[80]; 271 int ch; 272 char *cp; 273 int escaped_nl = 0; 274 275 begin: 276 while ((ch = getc(fp)) != EOF) 277 if (ch != ' ' && ch != '\t') 278 break; 279 if (ch == EOF) 280 return((char *)EOF); 281 if (ch == '\\') { 282 escaped_nl = 1; 283 goto begin; 284 } 285 if (ch == '\n') { 286 if (escaped_nl) { 287 escaped_nl = 0; 288 goto begin; 289 } 290 else 291 return(NULL); 292 } 293 cp = line; 294 *cp++ = ch; 295 while ((ch = getc(fp)) != EOF) { 296 if (isspace(ch)) 297 break; 298 *cp++ = ch; 299 } 300 *cp = 0; 301 if (ch == EOF) 302 return((char *)EOF); 303 ungetc(ch, fp); 304 return(line); 305 } 306 307 /* 308 * get_quoted_word 309 * like get_word but will accept something in double or single quotes 310 * (to allow embedded spaces). 311 */ 312 char * 313 get_quoted_word(FILE *fp) 314 { 315 static char line[256]; 316 int ch; 317 char *cp; 318 int escaped_nl = 0; 319 320 begin: 321 while ((ch = getc(fp)) != EOF) 322 if (ch != ' ' && ch != '\t') 323 break; 324 if (ch == EOF) 325 return((char *)EOF); 326 if (ch == '\\') { 327 escaped_nl = 1; 328 goto begin; 329 } 330 if (ch == '\n') { 331 if (escaped_nl) { 332 escaped_nl = 0; 333 goto begin; 334 } 335 else 336 return(NULL); 337 } 338 cp = line; 339 if (ch == '"' || ch == '\'') { 340 int quote = ch; 341 342 while ((ch = getc(fp)) != EOF) { 343 if (ch == quote) 344 break; 345 if (ch == '\n') { 346 *cp = 0; 347 printf("config: missing quote reading `%s'\n", 348 line); 349 exit(2); 350 } 351 *cp++ = ch; 352 } 353 } else { 354 *cp++ = ch; 355 while ((ch = getc(fp)) != EOF) { 356 if (isspace(ch)) 357 break; 358 *cp++ = ch; 359 } 360 if (ch != EOF) 361 ungetc(ch, fp); 362 } 363 *cp = 0; 364 if (ch == EOF) 365 return((char *)EOF); 366 return(line); 367 } 368 369 /* 370 * prepend the path to a filename 371 */ 372 char * 373 path(const char *file) 374 { 375 char *cp; 376 377 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 378 strcpy(cp, destdir); 379 if (file != NULL) { 380 strcat(cp, "/"); 381 strcat(cp, file); 382 } 383 return(cp); 384 } 385 386 static void 387 configfile(void) 388 { 389 FILE *fi, *fo; 390 char *p; 391 int i; 392 393 fi = fopen(PREFIX, "r"); 394 if (fi == NULL) 395 err(2, "%s", PREFIX); 396 fo = fopen(p = path("config.c.new"), "w"); 397 if (fo == NULL) 398 err(2, "%s", p); 399 fprintf(fo, "#include \"opt_config.h\"\n"); 400 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 401 fprintf(fo, "/* Mark config as used, so gcc doesn't optimize it away. */\n"); 402 fprintf(fo, "#include <sys/types.h>\n"); 403 fprintf(fo, "__used\n"); 404 fprintf(fo, "static const char config[] = \"\\\n"); 405 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 406 while (EOF != (i = getc(fi))) { 407 if (i == '\n') { 408 fprintf(fo, "\\n\\\n___"); 409 } else if (i == '\"') { 410 fprintf(fo, "\\\""); 411 } else if (i == '\\') { 412 fprintf(fo, "\\\\"); 413 } else { 414 putc(i, fo); 415 } 416 } 417 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 418 fprintf(fo, "\";\n"); 419 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 420 fclose(fi); 421 fclose(fo); 422 moveifchanged(path("config.c.new"), path("config.c")); 423 } 424 425 /* 426 * moveifchanged -- 427 * compare two files; rename if changed. 428 */ 429 void 430 moveifchanged(const char *from_name, const char *to_name) 431 { 432 char *p, *q; 433 int changed; 434 size_t tsize; 435 struct stat from_sb, to_sb; 436 int from_fd, to_fd; 437 438 changed = 0; 439 440 if ((from_fd = open(from_name, O_RDONLY)) < 0) 441 err(EX_OSERR, "moveifchanged open(%s)", from_name); 442 443 if ((to_fd = open(to_name, O_RDONLY)) < 0) 444 changed++; 445 446 if (!changed && fstat(from_fd, &from_sb) < 0) 447 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 448 449 if (!changed && fstat(to_fd, &to_sb) < 0) 450 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 451 452 if (!changed && from_sb.st_size != to_sb.st_size) 453 changed++; 454 455 tsize = (size_t)from_sb.st_size; 456 457 if (!changed) { 458 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 459 #ifndef MAP_FAILED 460 #define MAP_FAILED ((caddr_t)-1) 461 #endif 462 if (p == MAP_FAILED) 463 err(EX_OSERR, "mmap %s", from_name); 464 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 465 if (q == MAP_FAILED) 466 err(EX_OSERR, "mmap %s", to_name); 467 468 changed = memcmp(p, q, tsize); 469 munmap(p, tsize); 470 munmap(q, tsize); 471 } 472 if (changed) { 473 if (rename(from_name, to_name) < 0) 474 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 475 } else { 476 if (unlink(from_name) < 0) 477 err(EX_OSERR, "unlink(%s)", from_name); 478 } 479 } 480