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 1.14 2005/01/12 00:26:03 cpressey 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", "svr4" }; 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 * make symbolic links in compilation directory 167 * for "sys" (to make genassym.c work along with #include <sys/xxx>) 168 * and similarly for "machine". 169 */ 170 if (*srcdir == '\0') 171 snprintf(linkdest, sizeof(linkdest), "../../%s/include", 172 machinename); 173 else 174 snprintf(linkdest, sizeof(linkdest), "%s/%s/include", 175 srcdir, machinename); 176 symlink(linkdest, path("machine")); 177 178 /* 179 * XXX check directory structure for architecture subdirectories and 180 * create the symlinks automatically XXX 181 */ 182 if (*srcdir == '\0') 183 snprintf(linkdest, sizeof(linkdest), 184 "../../../../../net/i4b/include/%s", 185 machinename); 186 else 187 snprintf(linkdest, sizeof(linkdest), "%s/net/i4b/include/%s", 188 srcdir, machinename); 189 mkdir(path("net"), 0755); 190 mkdir(path("net/i4b"), 0755); 191 mkdir(path("net/i4b/include"), 0755); 192 symlink(linkdest, path("net/i4b/include/machine")); 193 194 for (i = 0; i < sizeof(emus) / sizeof(emus[0]); ++i) { 195 if (*srcdir == 0) { 196 snprintf(linkdest, sizeof(linkdest), 197 "../../emulation/%s/%s", 198 emus[i], machinename); 199 } else { 200 snprintf(linkdest, sizeof(linkdest), 201 "%s/emulation/%s/%s", 202 srcdir, emus[i], machinename); 203 } 204 snprintf(linksrc, sizeof(linksrc), "arch_%s", emus[i]); 205 symlink(linkdest, path(linksrc)); 206 } 207 208 options(); /* make options .h files */ 209 makefile(); /* build Makefile */ 210 headers(); /* make a lot of .h files */ 211 configfile(); /* put config file into kernel*/ 212 printf("Kernel build directory is %s\n", p); 213 exit(EX_OK); 214 } 215 216 /* 217 * get_srcdir 218 * determine the root of the kernel source tree 219 * and save that in srcdir. 220 */ 221 static void 222 get_srcdir(void) 223 { 224 225 if (realpath("../..", srcdir) == NULL) 226 errx(2, "Unable to find root of source tree"); 227 } 228 229 static void 230 usage(void) 231 { 232 233 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n"); 234 exit(1); 235 } 236 237 /* 238 * get_word 239 * returns EOF on end of file 240 * NULL on end of line 241 * pointer to the word otherwise 242 */ 243 char * 244 get_word(FILE *fp) 245 { 246 static char line[80]; 247 int ch; 248 char *cp; 249 int escaped_nl = 0; 250 251 begin: 252 while ((ch = getc(fp)) != EOF) 253 if (ch != ' ' && ch != '\t') 254 break; 255 if (ch == EOF) 256 return((char *)EOF); 257 if (ch == '\\') { 258 escaped_nl = 1; 259 goto begin; 260 } 261 if (ch == '\n') { 262 if (escaped_nl) { 263 escaped_nl = 0; 264 goto begin; 265 } 266 else 267 return(NULL); 268 } 269 cp = line; 270 *cp++ = ch; 271 while ((ch = getc(fp)) != EOF) { 272 if (isspace(ch)) 273 break; 274 *cp++ = ch; 275 } 276 *cp = 0; 277 if (ch == EOF) 278 return((char *)EOF); 279 ungetc(ch, fp); 280 return(line); 281 } 282 283 /* 284 * get_quoted_word 285 * like get_word but will accept something in double or single quotes 286 * (to allow embedded spaces). 287 */ 288 char * 289 get_quoted_word(FILE *fp) 290 { 291 static char line[256]; 292 int ch; 293 char *cp; 294 int escaped_nl = 0; 295 296 begin: 297 while ((ch = getc(fp)) != EOF) 298 if (ch != ' ' && ch != '\t') 299 break; 300 if (ch == EOF) 301 return((char *)EOF); 302 if (ch == '\\') { 303 escaped_nl = 1; 304 goto begin; 305 } 306 if (ch == '\n') { 307 if (escaped_nl) { 308 escaped_nl = 0; 309 goto begin; 310 } 311 else 312 return(NULL); 313 } 314 cp = line; 315 if (ch == '"' || ch == '\'') { 316 int quote = ch; 317 318 while ((ch = getc(fp)) != EOF) { 319 if (ch == quote) 320 break; 321 if (ch == '\n') { 322 *cp = 0; 323 printf("config: missing quote reading `%s'\n", 324 line); 325 exit(2); 326 } 327 *cp++ = ch; 328 } 329 } else { 330 *cp++ = ch; 331 while ((ch = getc(fp)) != EOF) { 332 if (isspace(ch)) 333 break; 334 *cp++ = ch; 335 } 336 if (ch != EOF) 337 ungetc(ch, fp); 338 } 339 *cp = 0; 340 if (ch == EOF) 341 return((char *)EOF); 342 return(line); 343 } 344 345 /* 346 * prepend the path to a filename 347 */ 348 char * 349 path(const char *file) 350 { 351 char *cp; 352 353 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2)); 354 strcpy(cp, destdir); 355 if (file != NULL) { 356 strcat(cp, "/"); 357 strcat(cp, file); 358 } 359 return(cp); 360 } 361 362 static void 363 configfile(void) 364 { 365 FILE *fi, *fo; 366 char *p; 367 int i; 368 369 fi = fopen(PREFIX, "r"); 370 if (fi == NULL) 371 err(2, "%s", PREFIX); 372 fo = fopen(p = path("config.c.new"), "w"); 373 if (fo == NULL) 374 err(2, "%s", p); 375 fprintf(fo, "#include \"opt_config.h\"\n"); 376 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n"); 377 fprintf(fo, "static const char config[] = \"\\\n"); 378 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX); 379 while (EOF != (i = getc(fi))) { 380 if (i == '\n') { 381 fprintf(fo, "\\n\\\n___"); 382 } else if (i == '\"') { 383 fprintf(fo, "\\\""); 384 } else if (i == '\\') { 385 fprintf(fo, "\\\\"); 386 } else { 387 putc(i, fo); 388 } 389 } 390 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX); 391 fprintf(fo, "\";\n"); 392 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n"); 393 fclose(fi); 394 fclose(fo); 395 moveifchanged(path("config.c.new"), path("config.c")); 396 } 397 398 /* 399 * moveifchanged -- 400 * compare two files; rename if changed. 401 */ 402 void 403 moveifchanged(const char *from_name, const char *to_name) 404 { 405 char *p, *q; 406 int changed; 407 size_t tsize; 408 struct stat from_sb, to_sb; 409 int from_fd, to_fd; 410 411 changed = 0; 412 413 if ((from_fd = open(from_name, O_RDONLY)) < 0) 414 err(EX_OSERR, "moveifchanged open(%s)", from_name); 415 416 if ((to_fd = open(to_name, O_RDONLY)) < 0) 417 changed++; 418 419 if (!changed && fstat(from_fd, &from_sb) < 0) 420 err(EX_OSERR, "moveifchanged fstat(%s)", from_name); 421 422 if (!changed && fstat(to_fd, &to_sb) < 0) 423 err(EX_OSERR, "moveifchanged fstat(%s)", to_name); 424 425 if (!changed && from_sb.st_size != to_sb.st_size) 426 changed++; 427 428 tsize = (size_t)from_sb.st_size; 429 430 if (!changed) { 431 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0); 432 #ifndef MAP_FAILED 433 #define MAP_FAILED ((caddr_t)-1) 434 #endif 435 if (p == MAP_FAILED) 436 err(EX_OSERR, "mmap %s", from_name); 437 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0); 438 if (q == MAP_FAILED) 439 err(EX_OSERR, "mmap %s", to_name); 440 441 changed = memcmp(p, q, tsize); 442 munmap(p, tsize); 443 munmap(q, tsize); 444 } 445 if (changed) { 446 if (rename(from_name, to_name) < 0) 447 err(EX_OSERR, "rename(%s, %s)", from_name, to_name); 448 } else { 449 if (unlink(from_name) < 0) 450 err(EX_OSERR, "unlink(%s)", from_name); 451 } 452 } 453