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 1.16 2006/05/22 06:26:30 swildner 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 <sysexits.h> 48 #include <unistd.h> 49 #include "y.tab.h" 50 #include "config.h" 51 52 #ifndef TRUE 53 #define TRUE (1) 54 #endif 55 56 #ifndef FALSE 57 #define FALSE (0) 58 #endif 59 60 #define CDIR "../../compile/" 61 62 char * PREFIX; 63 char destdir[MAXPATHLEN]; 64 char srcdir[MAXPATHLEN]; 65 66 static int no_config_clobber = TRUE; 67 int debugging; 68 int profiling; 69 70 static void configfile(void); 71 static void get_srcdir(void); 72 static void usage(void); 73 74 /* 75 * Config builds a set of files for building a UNIX 76 * system given a description of the desired system. 77 */ 78 int 79 main(int argc, char *argv[]) 80 { 81 struct stat buf; 82 int ch, len; 83 unsigned int i; 84 char *p; 85 char linksrc[64], linkdest[MAXPATHLEN]; 86 static const char *emus[] = { "linux" }; 87 88 while ((ch = getopt(argc, argv, "d:gprn")) != -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 'n': 103 /* no_config_clobber is now true by default, no-op */ 104 fprintf(stderr, 105 "*** Using obsolete config option '-n' ***\n"); 106 break; 107 case 'r': 108 no_config_clobber = FALSE; 109 break; 110 case '?': 111 default: 112 usage(); 113 } 114 argc -= optind; 115 argv += optind; 116 117 if (argc != 1) 118 usage(); 119 120 if (freopen(PREFIX = *argv, "r", stdin) == NULL) 121 err(2, "%s", PREFIX); 122 123 if (*destdir != '\0') { 124 len = strlen(destdir); 125 while (len > 1 && destdir[len - 1] == '/') 126 destdir[--len] = '\0'; 127 get_srcdir(); 128 } else { 129 strlcpy(destdir, CDIR, sizeof(destdir)); 130 strlcat(destdir, PREFIX, sizeof(destdir)); 131 } 132 133 p = path((char *)NULL); 134 if (stat(p, &buf)) { 135 if (mkdir(p, 0777)) 136 err(2, "%s", p); 137 } 138 else if ((buf.st_mode & S_IFMT) != S_IFDIR) { 139 errx(2, "%s isn't a directory", p); 140 } 141 else if (!no_config_clobber) { 142 char tmp[strlen(p) + 8]; 143 144 fprintf(stderr, "Removing old directory %s: ", p); 145 fflush(stderr); 146 snprintf(tmp, sizeof(tmp), "rm -rf %s", p); 147 if (system(tmp)) { 148 fprintf(stderr, "Failed!\n"); 149 err(2, "%s", tmp); 150 } 151 fprintf(stderr, "Done.\n"); 152 if (mkdir(p, 0777)) 153 err(2, "%s", p); 154 } 155 156 dtab = NULL; 157 if (yyparse()) 158 exit(3); 159 if (machinename == NULL) { 160 printf("Specify machine type, e.g. ``machine i386''\n"); 161 exit(1); 162 } 163 newbus_ioconf(); 164 165 /* 166 * "machine" points into <ARCH>/include - obsoleted by "arch" 167 */ 168 if (*srcdir == '\0') 169 snprintf(linkdest, sizeof(linkdest), "../../%s/include", 170 machinename); 171 else 172 snprintf(linkdest, sizeof(linkdest), "%s/%s/include", 173 srcdir, machinename); 174 symlink(linkdest, path("machine")); 175 176 /* 177 * "arch" points into <ARCH> 178 */ 179 if (*srcdir == '\0') 180 snprintf(linkdest, sizeof(linkdest), "../../%s", 181 machinename); 182 else 183 snprintf(linkdest, sizeof(linkdest), "%s/%s", 184 srcdir, machinename); 185 symlink(linkdest, path("arch")); 186 187 /* 188 * XXX check directory structure for architecture subdirectories and 189 * create the symlinks automatically XXX 190 */ 191 if (*srcdir == '\0') 192 snprintf(linkdest, sizeof(linkdest), 193 "../../../../../net/i4b/include/%s", 194 machinename); 195 else 196 snprintf(linkdest, sizeof(linkdest), "%s/net/i4b/include/%s", 197 srcdir, machinename); 198 mkdir(path("net"), 0755); 199 mkdir(path("net/i4b"), 0755); 200 mkdir(path("net/i4b/include"), 0755); 201 symlink(linkdest, path("net/i4b/include/machine")); 202 203 for (i = 0; i < sizeof(emus) / sizeof(emus[0]); ++i) { 204 if (*srcdir == 0) { 205 snprintf(linkdest, sizeof(linkdest), 206 "../../emulation/%s/%s", 207 emus[i], machinename); 208 } else { 209 snprintf(linkdest, sizeof(linkdest), 210 "%s/emulation/%s/%s", 211 srcdir, emus[i], machinename); 212 } 213 snprintf(linksrc, sizeof(linksrc), "arch_%s", emus[i]); 214 symlink(linkdest, path(linksrc)); 215 } 216 217 options(); /* make options .h files */ 218 makefile(); /* build Makefile */ 219 headers(); /* make a lot of .h files */ 220 configfile(); /* put config file into kernel*/ 221 printf("Kernel build directory is %s\n", p); 222 exit(EX_OK); 223 } 224 225 /* 226 * get_srcdir 227 * determine the root of the kernel source tree 228 * and save that in srcdir. 229 */ 230 static void 231 get_srcdir(void) 232 { 233 234 if (realpath("../..", srcdir) == NULL) 235 errx(2, "Unable to find root of source tree"); 236 } 237 238 static void 239 usage(void) 240 { 241 242 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 243 exit(1); 244 } 245 246 /* 247 * get_word 248 * returns EOF on end of file 249 * NULL on end of line 250 * pointer to the word otherwise 251 */ 252 char * 253 get_word(FILE *fp) 254 { 255 static char line[80]; 256 int ch; 257 char *cp; 258 int escaped_nl = 0; 259 260 begin: 261 while ((ch = getc(fp)) != EOF) 262 if (ch != ' ' && ch != '\t') 263 break; 264 if (ch == EOF) 265 return((char *)EOF); 266 if (ch == '\\') { 267 escaped_nl = 1; 268 goto begin; 269 } 270 if (ch == '\n') { 271 if (escaped_nl) { 272 escaped_nl = 0; 273 goto begin; 274 } 275 else 276 return(NULL); 277 } 278 cp = line; 279 *cp++ = ch; 280 while ((ch = getc(fp)) != EOF) { 281 if (isspace(ch)) 282 break; 283 *cp++ = ch; 284 } 285 *cp = 0; 286 if (ch == EOF) 287 return((char *)EOF); 288 ungetc(ch, fp); 289 return(line); 290 } 291 292 /* 293 * get_quoted_word 294 * like get_word but will accept something in double or single quotes 295 * (to allow embedded spaces). 296 */ 297 char * 298 get_quoted_word(FILE *fp) 299 { 300 static char line[256]; 301 int ch; 302 char *cp; 303 int escaped_nl = 0; 304 305 begin: 306 while ((ch = getc(fp)) != EOF) 307 if (ch != ' ' && ch != '\t') 308 break; 309 if (ch == EOF) 310 return((char *)EOF); 311 if (ch == '\\') { 312 escaped_nl = 1; 313 goto begin; 314 } 315 if (ch == '\n') { 316 if (escaped_nl) { 317 escaped_nl = 0; 318 goto begin; 319 } 320 else 321 return(NULL); 322 } 323 cp = line; 324 if (ch == '"' || ch == '\'') { 325 int quote = ch; 326 327 while ((ch = getc(fp)) != EOF) { 328 if (ch == quote) 329 break; 330 if (ch == '\n') { 331 *cp = 0; 332 printf("config: missing quote reading `%s'\n", 333 line); 334 exit(2); 335 } 336 *cp++ = ch; 337 } 338 } else { 339 *cp++ = ch; 340 while ((ch = getc(fp)) != EOF) { 341 if (isspace(ch)) 342 break; 343 *cp++ = ch; 344 } 345 if (ch != EOF) 346 ungetc(ch, fp); 347 } 348 *cp = 0; 349 if (ch == EOF) 350 return((char *)EOF); 351 return(line); 352 } 353 354 /* 355 * prepend the path to a filename 356 */ 357 char * 358 path(const char *file) 359 { 360 char *cp; 361 362 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 363 strcpy(cp, destdir); 364 if (file != NULL) { 365 strcat(cp, "/"); 366 strcat(cp, file); 367 } 368 return(cp); 369 } 370 371 static void 372 configfile(void) 373 { 374 FILE *fi, *fo; 375 char *p; 376 int i; 377 378 fi = fopen(PREFIX, "r"); 379 if (fi == NULL) 380 err(2, "%s", PREFIX); 381 fo = fopen(p = path("config.c.new"), "w"); 382 if (fo == NULL) 383 err(2, "%s", p); 384 fprintf(fo, "#include \"opt_config.h\"\n"); 385 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 386 fprintf(fo, "static const char config[] = \"\\\n"); 387 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 388 while (EOF != (i = getc(fi))) { 389 if (i == '\n') { 390 fprintf(fo, "\\n\\\n___"); 391 } else if (i == '\"') { 392 fprintf(fo, "\\\""); 393 } else if (i == '\\') { 394 fprintf(fo, "\\\\"); 395 } else { 396 putc(i, fo); 397 } 398 } 399 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 400 fprintf(fo, "\";\n"); 401 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 402 fclose(fi); 403 fclose(fo); 404 moveifchanged(path("config.c.new"), path("config.c")); 405 } 406 407 /* 408 * moveifchanged -- 409 * compare two files; rename if changed. 410 */ 411 void 412 moveifchanged(const char *from_name, const char *to_name) 413 { 414 char *p, *q; 415 int changed; 416 size_t tsize; 417 struct stat from_sb, to_sb; 418 int from_fd, to_fd; 419 420 changed = 0; 421 422 if ((from_fd = open(from_name, O_RDONLY)) < 0) 423 err(EX_OSERR, "moveifchanged open(%s)", from_name); 424 425 if ((to_fd = open(to_name, O_RDONLY)) < 0) 426 changed++; 427 428 if (!changed && fstat(from_fd, &from_sb) < 0) 429 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 430 431 if (!changed && fstat(to_fd, &to_sb) < 0) 432 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 433 434 if (!changed && from_sb.st_size != to_sb.st_size) 435 changed++; 436 437 tsize = (size_t)from_sb.st_size; 438 439 if (!changed) { 440 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 441 #ifndef MAP_FAILED 442 #define MAP_FAILED ((caddr_t)-1) 443 #endif 444 if (p == MAP_FAILED) 445 err(EX_OSERR, "mmap %s", from_name); 446 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 447 if (q == MAP_FAILED) 448 err(EX_OSERR, "mmap %s", to_name); 449 450 changed = memcmp(p, q, tsize); 451 munmap(p, tsize); 452 munmap(q, tsize); 453 } 454 if (changed) { 455 if (rename(from_name, to_name) < 0) 456 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 457 } else { 458 if (unlink(from_name) < 0) 459 err(EX_OSERR, "unlink(%s)", from_name); 460 } 461 } 462