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 1.2 2003/06/17 04:29:53 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 options(); /* make options .h files */ 187 makefile(); /* build Makefile */ 188 headers(); /* make a lot of .h files */ 189 configfile(); /* put config file into kernel*/ 190 printf("Kernel build directory is %s\n", p); 191 exit(0); 192 } 193 194 /* 195 * get_srcdir 196 * determine the root of the kernel source tree 197 * and save that in srcdir. 198 */ 199 static void 200 get_srcdir() 201 { 202 if (realpath("../..", srcdir) == NULL) 203 errx(2, "Unable to find root of source tree"); 204 } 205 206 static void 207 usage() 208 { 209 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 210 exit(1); 211 } 212 213 /* 214 * get_word 215 * returns EOF on end of file 216 * NULL on end of line 217 * pointer to the word otherwise 218 */ 219 char * 220 get_word(fp) 221 register FILE *fp; 222 { 223 static char line[80]; 224 register int ch; 225 register char *cp; 226 int escaped_nl = 0; 227 228 begin: 229 while ((ch = getc(fp)) != EOF) 230 if (ch != ' ' && ch != '\t') 231 break; 232 if (ch == EOF) 233 return ((char *)EOF); 234 if (ch == '\\'){ 235 escaped_nl = 1; 236 goto begin; 237 } 238 if (ch == '\n') { 239 if (escaped_nl){ 240 escaped_nl = 0; 241 goto begin; 242 } 243 else 244 return (NULL); 245 } 246 cp = line; 247 *cp++ = ch; 248 while ((ch = getc(fp)) != EOF) { 249 if (isspace(ch)) 250 break; 251 *cp++ = ch; 252 } 253 *cp = 0; 254 if (ch == EOF) 255 return ((char *)EOF); 256 (void) ungetc(ch, fp); 257 return (line); 258 } 259 260 /* 261 * get_quoted_word 262 * like get_word but will accept something in double or single quotes 263 * (to allow embedded spaces). 264 */ 265 char * 266 get_quoted_word(fp) 267 register FILE *fp; 268 { 269 static char line[256]; 270 register int ch; 271 register char *cp; 272 int escaped_nl = 0; 273 274 begin: 275 while ((ch = getc(fp)) != EOF) 276 if (ch != ' ' && ch != '\t') 277 break; 278 if (ch == EOF) 279 return ((char *)EOF); 280 if (ch == '\\'){ 281 escaped_nl = 1; 282 goto begin; 283 } 284 if (ch == '\n') { 285 if (escaped_nl){ 286 escaped_nl = 0; 287 goto begin; 288 } 289 else 290 return (NULL); 291 } 292 cp = line; 293 if (ch == '"' || ch == '\'') { 294 register int quote = ch; 295 296 while ((ch = getc(fp)) != EOF) { 297 if (ch == quote) 298 break; 299 if (ch == '\n') { 300 *cp = 0; 301 printf("config: missing quote reading `%s'\n", 302 line); 303 exit(2); 304 } 305 *cp++ = ch; 306 } 307 } else { 308 *cp++ = ch; 309 while ((ch = getc(fp)) != EOF) { 310 if (isspace(ch)) 311 break; 312 *cp++ = ch; 313 } 314 if (ch != EOF) 315 (void) ungetc(ch, fp); 316 } 317 *cp = 0; 318 if (ch == EOF) 319 return ((char *)EOF); 320 return (line); 321 } 322 323 /* 324 * prepend the path to a filename 325 */ 326 char * 327 path(file) 328 char *file; 329 { 330 register char *cp; 331 332 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 333 (void) strcpy(cp, destdir); 334 if (file) { 335 (void) strcat(cp, "/"); 336 (void) strcat(cp, file); 337 } 338 return (cp); 339 } 340 341 static void 342 configfile() 343 { 344 FILE *fi, *fo; 345 char *p; 346 int i; 347 348 fi = fopen(PREFIX, "r"); 349 if (!fi) 350 err(2, "%s", PREFIX); 351 fo = fopen(p=path("config.c.new"), "w"); 352 if (!fo) 353 err(2, "%s", p); 354 fprintf(fo, "#include \"opt_config.h\"\n"); 355 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 356 fprintf(fo, "static const char config[] = \"\\\n"); 357 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 358 while (EOF != (i=getc(fi))) { 359 if (i == '\n') { 360 fprintf(fo, "\\n\\\n___"); 361 } else if (i == '\"') { 362 fprintf(fo, "\\\""); 363 } else if (i == '\\') { 364 fprintf(fo, "\\\\"); 365 } else { 366 putc(i, fo); 367 } 368 } 369 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 370 fprintf(fo, "\";\n"); 371 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 372 fclose(fi); 373 fclose(fo); 374 moveifchanged(path("config.c.new"), path("config.c")); 375 } 376 377 /* 378 * moveifchanged -- 379 * compare two files; rename if changed. 380 */ 381 void 382 moveifchanged(const char *from_name, const char *to_name) 383 { 384 char *p, *q; 385 int changed; 386 size_t tsize; 387 struct stat from_sb, to_sb; 388 int from_fd, to_fd; 389 390 changed = 0; 391 392 if ((from_fd = open(from_name, O_RDONLY)) < 0) 393 err(EX_OSERR, "moveifchanged open(%s)", from_name); 394 395 if ((to_fd = open(to_name, O_RDONLY)) < 0) 396 changed++; 397 398 if (!changed && fstat(from_fd, &from_sb) < 0) 399 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 400 401 if (!changed && fstat(to_fd, &to_sb) < 0) 402 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 403 404 if (!changed && from_sb.st_size != to_sb.st_size) 405 changed++; 406 407 tsize = (size_t)from_sb.st_size; 408 409 if (!changed) { 410 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 411 #ifndef MAP_FAILED 412 #define MAP_FAILED ((caddr_t) -1) 413 #endif 414 if (p == MAP_FAILED) 415 err(EX_OSERR, "mmap %s", from_name); 416 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 417 if (q == MAP_FAILED) 418 err(EX_OSERR, "mmap %s", to_name); 419 420 changed = memcmp(p, q, tsize); 421 munmap(p, tsize); 422 munmap(q, tsize); 423 } 424 if (changed) { 425 if (rename(from_name, to_name) < 0) 426 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 427 } else { 428 if (unlink(from_name) < 0) 429 err(EX_OSERR, "unlink(%s)", from_name); 430 } 431 } 432