1 /* $NetBSD: services_mkdb.c,v 1.14 2008/04/28 20:24:17 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn and Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/stat.h> 37 38 #include <assert.h> 39 #include <db.h> 40 #include <err.h> 41 #include <fcntl.h> 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <libgen.h> 48 #include <libutil.h> 49 #include <ctype.h> 50 #include <errno.h> 51 #include <stringlist.h> 52 53 #include "extern.h" 54 55 static char tname[MAXPATHLEN]; 56 57 #define PMASK 0xffff 58 #define PROTOMAX 5 59 60 static void add(DB *, StringList *, size_t, const char *, size_t *, int); 61 static StringList ***parseservices(const char *, StringList *); 62 static void cleanup(void); 63 static void store(DB *, DBT *, DBT *, int); 64 static void killproto(DBT *); 65 static char *getstring(const char *, size_t, char **, const char *); 66 static size_t getprotoindex(StringList *, const char *); 67 static const char *getprotostr(StringList *, size_t); 68 static const char *mkaliases(StringList *, char *, size_t); 69 static void usage(void); 70 71 HASHINFO hinfo = { 72 .bsize = 256, 73 .ffactor = 4, 74 .nelem = 32768, 75 .cachesize = 1024, 76 .hash = NULL, 77 .lorder = 0 78 }; 79 80 81 int 82 main(int argc, char *argv[]) 83 { 84 DB *db; 85 int ch; 86 const char *fname = _PATH_SERVICES; 87 const char *dbname = _PATH_SERVICES_DB; 88 int warndup = 1; 89 int unique = 0; 90 int otherflag = 0; 91 int byteorder = 0; 92 size_t cnt = 0; 93 StringList *sl, ***svc; 94 size_t port, proto; 95 char *dbname_dir; 96 int dbname_dir_fd = -1; 97 98 setprogname(argv[0]); 99 100 while ((ch = getopt(argc, argv, "blo:qu")) != -1) 101 switch (ch) { 102 case 'b': 103 case 'l': 104 if (byteorder != 0) 105 usage(); 106 byteorder = ch == 'b' ? 4321 : 1234; 107 break; 108 case 'q': 109 otherflag = 1; 110 warndup = 0; 111 break; 112 case 'o': 113 otherflag = 1; 114 dbname = optarg; 115 break; 116 case 'u': 117 unique++; 118 break; 119 case '?': 120 default: 121 usage(); 122 } 123 124 argc -= optind; 125 argv += optind; 126 127 if (argc > 1 || (unique && otherflag)) 128 usage(); 129 if (argc == 1) 130 fname = argv[0]; 131 132 /* Set byte order. */ 133 hinfo.lorder = byteorder; 134 135 if (unique) 136 uniq(fname); 137 138 svc = parseservices(fname, sl = sl_init()); 139 140 if (atexit(cleanup)) 141 err(1, "Cannot install exit handler"); 142 143 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 144 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL | O_SYNC, 145 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 146 if (!db) 147 err(1, "Error opening temporary database `%s'", tname); 148 149 150 for (port = 0; port < PMASK + 1; port++) { 151 if (svc[port] == NULL) 152 continue; 153 154 for (proto = 0; proto < PROTOMAX; proto++) { 155 StringList *s; 156 if ((s = svc[port][proto]) == NULL) 157 continue; 158 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 159 } 160 161 free(svc[port]); 162 } 163 164 free(svc); 165 sl_free(sl, 1); 166 167 if ((db->close)(db)) 168 err(1, "Error closing temporary database `%s'", tname); 169 170 /* 171 * Make sure file is safe on disk. To improve performance we will call 172 * fsync() to the directory where file lies 173 */ 174 if (rename(tname, dbname) == -1 || 175 (dbname_dir = dirname(dbname)) == NULL || 176 (dbname_dir_fd = open(dbname_dir, O_RDONLY|O_DIRECTORY)) == -1 || 177 fsync(dbname_dir_fd) != 0) { 178 if (dbname_dir_fd != -1) 179 close(dbname_dir_fd); 180 err(1, "Cannot rename `%s' to `%s'", tname, dbname); 181 } 182 183 if (dbname_dir_fd != -1) 184 close(dbname_dir_fd); 185 186 return 0; 187 } 188 189 static void 190 add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt, 191 int warndup) 192 { 193 size_t i; 194 char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ]; 195 DBT data, key; 196 key.data = keyb; 197 data.data = datab; 198 199 #ifdef DEBUG 200 (void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto); 201 for (i = 1; i < sl->sl_cur; i++) 202 (void)printf("%s ", sl->sl_str[i]); 203 (void)printf("]\n"); 204 #endif 205 206 /* key `indirect key', data `full line' */ 207 data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1; 208 key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s", 209 sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1; 210 store(db, &data, &key, warndup); 211 212 /* key `\377port/proto', data = `indirect key' */ 213 key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s", 214 port, proto) + 1; 215 store(db, &key, &data, warndup); 216 217 /* key `\377port', data = `indirect key' */ 218 killproto(&key); 219 store(db, &key, &data, warndup); 220 221 /* add references for service and all aliases */ 222 for (i = 0; i < sl->sl_cur; i++) { 223 /* key `\376service/proto', data = `indirect key' */ 224 key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s", 225 sl->sl_str[i], proto) + 1; 226 store(db, &key, &data, warndup); 227 228 /* key `\376service', data = `indirect key' */ 229 killproto(&key); 230 store(db, &key, &data, warndup); 231 } 232 sl_free(sl, 1); 233 } 234 235 static StringList *** 236 parseservices(const char *fname, StringList *sl) 237 { 238 size_t len, line, pindex; 239 FILE *fp; 240 StringList ***svc, *s; 241 char *p, *ep; 242 243 if ((fp = fopen(fname, "r")) == NULL) 244 err(1, "Cannot open `%s'", fname); 245 246 line = 0; 247 if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL) 248 err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1)); 249 250 /* XXX: change NULL to "\0\0#" when fparseln fixed */ 251 for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) { 252 char *name, *port, *proto, *aliases, *cp, *alias; 253 unsigned long pnum; 254 255 if (len == 0) 256 continue; 257 258 for (cp = p; *cp && isspace((unsigned char)*cp); cp++) 259 continue; 260 261 if (*cp == '\0' || *cp == '#') 262 continue; 263 264 if ((name = getstring(fname, line, &cp, "name")) == NULL) 265 continue; 266 267 if ((port = getstring(fname, line, &cp, "port")) == NULL) 268 continue; 269 270 if (cp) { 271 for (aliases = cp; *cp && *cp != '#'; cp++) 272 continue; 273 274 if (*cp) 275 *cp = '\0'; 276 } else 277 aliases = NULL; 278 279 proto = strchr(port, '/'); 280 if (proto == NULL || proto[1] == '\0') { 281 warnx("%s, %zu: no protocol found", fname, line); 282 continue; 283 } 284 *proto++ = '\0'; 285 286 errno = 0; 287 pnum = strtoul(port, &ep, 0); 288 if (*port == '\0' || *ep != '\0') { 289 warnx("%s, %zu: invalid port `%s'", fname, line, port); 290 continue; 291 } 292 if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) { 293 warnx("%s, %zu: port too big `%s'", fname, line, port); 294 continue; 295 } 296 297 if (svc[pnum] == NULL) { 298 svc[pnum] = calloc(PROTOMAX, sizeof(StringList *)); 299 if (svc[pnum] == NULL) 300 err(1, "Cannot allocate %zu bytes", 301 (size_t)PROTOMAX); 302 } 303 304 pindex = getprotoindex(sl, proto); 305 if (svc[pnum][pindex] == NULL) 306 s = svc[pnum][pindex] = sl_init(); 307 else 308 s = svc[pnum][pindex]; 309 310 /* build list of aliases */ 311 if (sl_find(s, name) == NULL) { 312 char *p2; 313 314 if ((p2 = strdup(name)) == NULL) 315 err(1, "Cannot copy string"); 316 (void)sl_add(s, p2); 317 } 318 319 if (aliases) { 320 while ((alias = strsep(&aliases, " \t")) != NULL) { 321 if (alias[0] == '\0') 322 continue; 323 if (sl_find(s, alias) == NULL) { 324 char *p2; 325 326 if ((p2 = strdup(alias)) == NULL) 327 err(1, "Cannot copy string"); 328 (void)sl_add(s, p2); 329 } 330 } 331 } 332 } 333 (void)fclose(fp); 334 return svc; 335 } 336 337 /* 338 * cleanup(): Remove temporary files upon exit 339 */ 340 static void 341 cleanup(void) 342 { 343 if (tname[0]) 344 (void)unlink(tname); 345 } 346 347 static char * 348 getstring(const char *fname, size_t line, char **cp, const char *tag) 349 { 350 char *str; 351 352 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 353 continue; 354 355 if (str == NULL) 356 warnx("%s, %zu: no %s found", fname, line, tag); 357 358 return str; 359 } 360 361 static void 362 killproto(DBT *key) 363 { 364 char *p, *d = key->data; 365 366 if ((p = strchr(d, '/')) == NULL) 367 abort(); 368 *p++ = '\0'; 369 key->size = p - d; 370 } 371 372 static void 373 store(DB *db, DBT *key, DBT *data, int warndup) 374 { 375 #ifdef DEBUG 376 int k = key->size - 1; 377 int d = data->size - 1; 378 (void)printf("store [%*.*s] [%*.*s]\n", 379 k, k, (char *)key->data + 1, 380 d, d, (char *)data->data + 1); 381 #endif 382 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 383 case 0: 384 break; 385 case 1: 386 if (warndup) 387 warnx("duplicate service `%s'", 388 &((char *)key->data)[1]); 389 break; 390 case -1: 391 err(1, "put"); 392 break; 393 default: 394 abort(); 395 break; 396 } 397 } 398 399 static size_t 400 getprotoindex(StringList *sl, const char *str) 401 { 402 size_t i; 403 char *p; 404 405 for (i= 0; i < sl->sl_cur; i++) 406 if (strcmp(sl->sl_str[i], str) == 0) 407 return i; 408 409 if (i == PROTOMAX) 410 errx(1, "Ran out of protocols adding `%s';" 411 " recompile with larger PROTOMAX", str); 412 if ((p = strdup(str)) == NULL) 413 err(1, "Cannot copy string"); 414 (void)sl_add(sl, p); 415 return i; 416 } 417 418 static const char * 419 getprotostr(StringList *sl, size_t i) 420 { 421 assert(i < sl->sl_cur); 422 return sl->sl_str[i]; 423 } 424 425 static const char * 426 mkaliases(StringList *sl, char *buf, size_t len) 427 { 428 size_t nc, i, pos; 429 430 buf[0] = 0; 431 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 432 nc = strlcpy(buf + pos, sl->sl_str[i], len); 433 if (nc >= len) 434 goto out; 435 pos += nc; 436 len -= nc; 437 nc = strlcpy(buf + pos, " ", len); 438 if (nc >= len) 439 goto out; 440 pos += nc; 441 len -= nc; 442 } 443 return buf; 444 out: 445 warn("aliases for `%s' truncated", sl->sl_str[0]); 446 return buf; 447 } 448 449 static void 450 usage(void) 451 { 452 (void)fprintf(stderr, 453 "Usage:\t%s [-b | -l] [-q] [-o <db>] [<servicefile>]\n" 454 "\t%s -u [<servicefile>]\n", getprogname(), getprogname()); 455 exit(1); 456 } 457