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 1.3 2003/08/07 21:19:25 dillon 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 __P((void)); 71 static void get_srcdir __P((void)); 72 static void usage __P((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(argc, argv) 80 int argc; 81 char **argv; 82 { 83 84 struct stat buf; 85 int ch, len; 86 char *p; 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 switch (machine) { 160 161 case MACHINE_I386: 162 case MACHINE_PC98: 163 case MACHINE_ALPHA: 164 newbus_ioconf(); /* Print ioconf.c */ 165 break; 166 167 default: 168 printf("Specify machine type, e.g. ``machine i386''\n"); 169 exit(1); 170 } 171 /* 172 * make symbolic links in compilation directory 173 * for "sys" (to make genassym.c work along with #include <sys/xxx>) 174 * and similarly for "machine". 175 */ 176 { 177 char xxx[MAXPATHLEN]; 178 if (*srcdir == '\0') 179 (void)snprintf(xxx, sizeof(xxx), "../../%s/include", 180 machinename); 181 else 182 (void)snprintf(xxx, sizeof(xxx), "%s/%s/include", 183 srcdir, machinename); 184 (void) symlink(xxx, path("machine")); 185 } 186 187 /* 188 * XXX check directory structure for architecture subdirectories and 189 * create the symlinks automatically XXX 190 */ 191 { 192 char xxx[MAXPATHLEN]; 193 if (*srcdir == '\0') 194 (void)snprintf(xxx, sizeof(xxx), "../../../../../net/i4b/include/%s", 195 machinename); 196 else 197 (void)snprintf(xxx, sizeof(xxx), "%s/net/i4b/include/%s", 198 srcdir, machinename); 199 (void) mkdir(path("net"), 0755); 200 (void) mkdir(path("net/i4b"), 0755); 201 (void) mkdir(path("net/i4b/include"), 0755); 202 (void) symlink(xxx, path("net/i4b/include/machine")); 203 } 204 { 205 char xxx[MAXPATHLEN]; 206 if (*srcdir == '\0') 207 (void)snprintf(xxx, sizeof(xxx), "../../../../emulation/linux/%s", 208 machinename); 209 else 210 (void)snprintf(xxx, sizeof(xxx), "%s/emulation/linux/%s", 211 srcdir, machinename); 212 (void) mkdir(path("emulation"), 0755); 213 (void) mkdir(path("emulation/linux"), 0755); 214 (void) symlink(xxx, path("emulation/linux/machine")); 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(0); 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() 232 { 233 if (realpath("../..", srcdir) == NULL) 234 errx(2, "Unable to find root of source tree"); 235 } 236 237 static void 238 usage() 239 { 240 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 241 exit(1); 242 } 243 244 /* 245 * get_word 246 * returns EOF on end of file 247 * NULL on end of line 248 * pointer to the word otherwise 249 */ 250 char * 251 get_word(fp) 252 register FILE *fp; 253 { 254 static char line[80]; 255 register int ch; 256 register char *cp; 257 int escaped_nl = 0; 258 259 begin: 260 while ((ch = getc(fp)) != EOF) 261 if (ch != ' ' && ch != '\t') 262 break; 263 if (ch == EOF) 264 return ((char *)EOF); 265 if (ch == '\\'){ 266 escaped_nl = 1; 267 goto begin; 268 } 269 if (ch == '\n') { 270 if (escaped_nl){ 271 escaped_nl = 0; 272 goto begin; 273 } 274 else 275 return (NULL); 276 } 277 cp = line; 278 *cp++ = ch; 279 while ((ch = getc(fp)) != EOF) { 280 if (isspace(ch)) 281 break; 282 *cp++ = ch; 283 } 284 *cp = 0; 285 if (ch == EOF) 286 return ((char *)EOF); 287 (void) ungetc(ch, fp); 288 return (line); 289 } 290 291 /* 292 * get_quoted_word 293 * like get_word but will accept something in double or single quotes 294 * (to allow embedded spaces). 295 */ 296 char * 297 get_quoted_word(fp) 298 register FILE *fp; 299 { 300 static char line[256]; 301 register int ch; 302 register 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 register 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 (void) 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(file) 359 char *file; 360 { 361 register char *cp; 362 363 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 364 (void) strcpy(cp, destdir); 365 if (file) { 366 (void) strcat(cp, "/"); 367 (void) strcat(cp, file); 368 } 369 return (cp); 370 } 371 372 static void 373 configfile() 374 { 375 FILE *fi, *fo; 376 char *p; 377 int i; 378 379 fi = fopen(PREFIX, "r"); 380 if (!fi) 381 err(2, "%s", PREFIX); 382 fo = fopen(p=path("config.c.new"), "w"); 383 if (!fo) 384 err(2, "%s", p); 385 fprintf(fo, "#include \"opt_config.h\"\n"); 386 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 387 fprintf(fo, "static const char config[] = \"\\\n"); 388 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 389 while (EOF != (i=getc(fi))) { 390 if (i == '\n') { 391 fprintf(fo, "\\n\\\n___"); 392 } else if (i == '\"') { 393 fprintf(fo, "\\\""); 394 } else if (i == '\\') { 395 fprintf(fo, "\\\\"); 396 } else { 397 putc(i, fo); 398 } 399 } 400 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 401 fprintf(fo, "\";\n"); 402 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 403 fclose(fi); 404 fclose(fo); 405 moveifchanged(path("config.c.new"), path("config.c")); 406 } 407 408 /* 409 * moveifchanged -- 410 * compare two files; rename if changed. 411 */ 412 void 413 moveifchanged(const char *from_name, const char *to_name) 414 { 415 char *p, *q; 416 int changed; 417 size_t tsize; 418 struct stat from_sb, to_sb; 419 int from_fd, to_fd; 420 421 changed = 0; 422 423 if ((from_fd = open(from_name, O_RDONLY)) < 0) 424 err(EX_OSERR, "moveifchanged open(%s)", from_name); 425 426 if ((to_fd = open(to_name, O_RDONLY)) < 0) 427 changed++; 428 429 if (!changed && fstat(from_fd, &from_sb) < 0) 430 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 431 432 if (!changed && fstat(to_fd, &to_sb) < 0) 433 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 434 435 if (!changed && from_sb.st_size != to_sb.st_size) 436 changed++; 437 438 tsize = (size_t)from_sb.st_size; 439 440 if (!changed) { 441 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 442 #ifndef MAP_FAILED 443 #define MAP_FAILED ((caddr_t) -1) 444 #endif 445 if (p == MAP_FAILED) 446 err(EX_OSERR, "mmap %s", from_name); 447 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 448 if (q == MAP_FAILED) 449 err(EX_OSERR, "mmap %s", to_name); 450 451 changed = memcmp(p, q, tsize); 452 munmap(p, tsize); 453 munmap(q, tsize); 454 } 455 if (changed) { 456 if (rename(from_name, to_name) < 0) 457 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 458 } else { 459 if (unlink(from_name) < 0) 460 err(EX_OSERR, "unlink(%s)", from_name); 461 } 462 } 463