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 1.7 2004/01/31 03:26:56 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(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 82 struct stat buf; 83 int ch, len; 84 char *p; 85 86 while ((ch = getopt(argc, argv, "d:gprn")) != -1) 87 switch (ch) { 88 case 'd': 89 if (*destdir == '\0') 90 strlcpy(destdir, optarg, sizeof(destdir)); 91 else 92 errx(2, "directory already set"); 93 break; 94 case 'g': 95 debugging++; 96 break; 97 case 'p': 98 profiling++; 99 break; 100 case 'n': 101 /* no_config_clobber is now true by default, no-op */ 102 fprintf(stderr, 103 "*** Using obsolete config option '-n' ***\n"); 104 break; 105 case 'r': 106 no_config_clobber = FALSE; 107 break; 108 case '?': 109 default: 110 usage(); 111 } 112 argc -= optind; 113 argv += optind; 114 115 if (argc != 1) 116 usage(); 117 118 if (freopen(PREFIX = *argv, "r", stdin) == NULL) 119 err(2, "%s", PREFIX); 120 121 if (*destdir != '\0') { 122 len = strlen(destdir); 123 while (len > 1 && destdir[len - 1] == '/') 124 destdir[--len] = '\0'; 125 get_srcdir(); 126 } else { 127 strlcpy(destdir, CDIR, sizeof(destdir)); 128 strlcat(destdir, PREFIX, sizeof(destdir)); 129 } 130 131 p = path((char *)NULL); 132 if (stat(p, &buf)) { 133 if (mkdir(p, 0777)) 134 err(2, "%s", p); 135 } 136 else if ((buf.st_mode & S_IFMT) != S_IFDIR) { 137 errx(2, "%s isn't a directory", p); 138 } 139 else if (!no_config_clobber) { 140 char tmp[strlen(p) + 8]; 141 142 fprintf(stderr, "Removing old directory %s: ", p); 143 fflush(stderr); 144 snprintf(tmp, sizeof(tmp), "rm -rf %s", p); 145 if (system(tmp)) { 146 fprintf(stderr, "Failed!\n"); 147 err(2, "%s", tmp); 148 } 149 fprintf(stderr, "Done.\n"); 150 if (mkdir(p, 0777)) 151 err(2, "%s", p); 152 } 153 154 dtab = NULL; 155 if (yyparse()) 156 exit(3); 157 if (machinename == NULL) { 158 printf("Specify machine type, e.g. ``machine i386''\n"); 159 exit(1); 160 } 161 newbus_ioconf(); 162 /* 163 * make symbolic links in compilation directory 164 * for "sys" (to make genassym.c work along with #include <sys/xxx>) 165 * and similarly for "machine". 166 */ 167 { 168 char xxx[MAXPATHLEN]; 169 if (*srcdir == '\0') 170 (void)snprintf(xxx, sizeof(xxx), "../../%s/include", 171 machinename); 172 else 173 (void)snprintf(xxx, sizeof(xxx), "%s/%s/include", 174 srcdir, machinename); 175 (void) symlink(xxx, path("machine")); 176 } 177 178 /* 179 * XXX check directory structure for architecture subdirectories and 180 * create the symlinks automatically XXX 181 */ 182 { 183 char xxx[MAXPATHLEN]; 184 if (*srcdir == '\0') 185 (void)snprintf(xxx, sizeof(xxx), "../../../../../net/i4b/include/%s", 186 machinename); 187 else 188 (void)snprintf(xxx, sizeof(xxx), "%s/net/i4b/include/%s", 189 srcdir, machinename); 190 (void) mkdir(path("net"), 0755); 191 (void) mkdir(path("net/i4b"), 0755); 192 (void) mkdir(path("net/i4b/include"), 0755); 193 (void) symlink(xxx, path("net/i4b/include/machine")); 194 } 195 196 { 197 static char *ary[] = { "linux", "svr4" }; 198 char xxx[MAXPATHLEN]; 199 char yyy[64]; 200 int i; 201 202 for (i = 0; i < sizeof(ary)/sizeof(ary[0]); ++i) { 203 if (*srcdir == 0) { 204 snprintf(xxx, sizeof(xxx), "../../emulation/%s/%s", 205 ary[i], machinename); 206 } else { 207 snprintf(xxx, sizeof(xxx), "%s/emulation/%s/%s", 208 srcdir, ary[i], machinename); 209 } 210 snprintf(yyy, sizeof(yyy), "arch_%s", ary[i]); 211 symlink(xxx, path(yyy)); 212 } 213 } 214 215 options(); /* make options .h files */ 216 makefile(); /* build Makefile */ 217 headers(); /* make a lot of .h files */ 218 configfile(); /* put config file into kernel*/ 219 printf("Kernel build directory is %s\n", p); 220 exit(0); 221 } 222 223 /* 224 * get_srcdir 225 * determine the root of the kernel source tree 226 * and save that in srcdir. 227 */ 228 static void 229 get_srcdir(void) 230 { 231 if (realpath("../..", srcdir) == NULL) 232 errx(2, "Unable to find root of source tree"); 233 } 234 235 static void 236 usage(void) 237 { 238 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 239 exit(1); 240 } 241 242 /* 243 * get_word 244 * returns EOF on end of file 245 * NULL on end of line 246 * pointer to the word otherwise 247 */ 248 char * 249 get_word(register FILE *fp) 250 { 251 static char line[80]; 252 register int ch; 253 register char *cp; 254 int escaped_nl = 0; 255 256 begin: 257 while ((ch = getc(fp)) != EOF) 258 if (ch != ' ' && ch != '\t') 259 break; 260 if (ch == EOF) 261 return ((char *)EOF); 262 if (ch == '\\'){ 263 escaped_nl = 1; 264 goto begin; 265 } 266 if (ch == '\n') { 267 if (escaped_nl){ 268 escaped_nl = 0; 269 goto begin; 270 } 271 else 272 return (NULL); 273 } 274 cp = line; 275 *cp++ = ch; 276 while ((ch = getc(fp)) != EOF) { 277 if (isspace(ch)) 278 break; 279 *cp++ = ch; 280 } 281 *cp = 0; 282 if (ch == EOF) 283 return ((char *)EOF); 284 (void) ungetc(ch, fp); 285 return (line); 286 } 287 288 /* 289 * get_quoted_word 290 * like get_word but will accept something in double or single quotes 291 * (to allow embedded spaces). 292 */ 293 char * 294 get_quoted_word(register FILE *fp) 295 { 296 static char line[256]; 297 register int ch; 298 register char *cp; 299 int escaped_nl = 0; 300 301 begin: 302 while ((ch = getc(fp)) != EOF) 303 if (ch != ' ' && ch != '\t') 304 break; 305 if (ch == EOF) 306 return ((char *)EOF); 307 if (ch == '\\'){ 308 escaped_nl = 1; 309 goto begin; 310 } 311 if (ch == '\n') { 312 if (escaped_nl){ 313 escaped_nl = 0; 314 goto begin; 315 } 316 else 317 return (NULL); 318 } 319 cp = line; 320 if (ch == '"' || ch == '\'') { 321 register int quote = ch; 322 323 while ((ch = getc(fp)) != EOF) { 324 if (ch == quote) 325 break; 326 if (ch == '\n') { 327 *cp = 0; 328 printf("config: missing quote reading `%s'\n", 329 line); 330 exit(2); 331 } 332 *cp++ = ch; 333 } 334 } else { 335 *cp++ = ch; 336 while ((ch = getc(fp)) != EOF) { 337 if (isspace(ch)) 338 break; 339 *cp++ = ch; 340 } 341 if (ch != EOF) 342 (void) ungetc(ch, fp); 343 } 344 *cp = 0; 345 if (ch == EOF) 346 return ((char *)EOF); 347 return (line); 348 } 349 350 /* 351 * prepend the path to a filename 352 */ 353 char * 354 path(char *file) 355 { 356 register char *cp; 357 358 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 359 (void) strcpy(cp, destdir); 360 if (file) { 361 (void) strcat(cp, "/"); 362 (void) strcat(cp, file); 363 } 364 return (cp); 365 } 366 367 static void 368 configfile(void) 369 { 370 FILE *fi, *fo; 371 char *p; 372 int i; 373 374 fi = fopen(PREFIX, "r"); 375 if (!fi) 376 err(2, "%s", PREFIX); 377 fo = fopen(p=path("config.c.new"), "w"); 378 if (!fo) 379 err(2, "%s", p); 380 fprintf(fo, "#include \"opt_config.h\"\n"); 381 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 382 fprintf(fo, "static const char config[] = \"\\\n"); 383 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 384 while (EOF != (i=getc(fi))) { 385 if (i == '\n') { 386 fprintf(fo, "\\n\\\n___"); 387 } else if (i == '\"') { 388 fprintf(fo, "\\\""); 389 } else if (i == '\\') { 390 fprintf(fo, "\\\\"); 391 } else { 392 putc(i, fo); 393 } 394 } 395 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 396 fprintf(fo, "\";\n"); 397 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 398 fclose(fi); 399 fclose(fo); 400 moveifchanged(path("config.c.new"), path("config.c")); 401 } 402 403 /* 404 * moveifchanged -- 405 * compare two files; rename if changed. 406 */ 407 void 408 moveifchanged(const char *from_name, const char *to_name) 409 { 410 char *p, *q; 411 int changed; 412 size_t tsize; 413 struct stat from_sb, to_sb; 414 int from_fd, to_fd; 415 416 changed = 0; 417 418 if ((from_fd = open(from_name, O_RDONLY)) < 0) 419 err(EX_OSERR, "moveifchanged open(%s)", from_name); 420 421 if ((to_fd = open(to_name, O_RDONLY)) < 0) 422 changed++; 423 424 if (!changed && fstat(from_fd, &from_sb) < 0) 425 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 426 427 if (!changed && fstat(to_fd, &to_sb) < 0) 428 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 429 430 if (!changed && from_sb.st_size != to_sb.st_size) 431 changed++; 432 433 tsize = (size_t)from_sb.st_size; 434 435 if (!changed) { 436 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 437 #ifndef MAP_FAILED 438 #define MAP_FAILED ((caddr_t) -1) 439 #endif 440 if (p == MAP_FAILED) 441 err(EX_OSERR, "mmap %s", from_name); 442 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 443 if (q == MAP_FAILED) 444 err(EX_OSERR, "mmap %s", to_name); 445 446 changed = memcmp(p, q, tsize); 447 munmap(p, tsize); 448 munmap(q, tsize); 449 } 450 if (changed) { 451 if (rename(from_name, to_name) < 0) 452 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 453 } else { 454 if (unlink(from_name) < 0) 455 err(EX_OSERR, "unlink(%s)", from_name); 456 } 457 } 458