1 /* $NetBSD: services_mkdb.c,v 1.14 2008/04/28 20:24:17 martin Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1999 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Luke Mewburn and Christos Zoulas. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/stat.h> 39 40 #include <assert.h> 41 #include <db.h> 42 #include <err.h> 43 #include <fcntl.h> 44 #include <netdb.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <libgen.h> 50 #include <ctype.h> 51 #include <errno.h> 52 #include <stringlist.h> 53 54 #include "extern.h" 55 56 static char tname[MAXPATHLEN]; 57 58 #define PMASK 0xffff 59 #define PROTOMAX 6 60 61 static void add(DB *, StringList *, size_t, const char *, size_t *, int); 62 static StringList ***parseservices(const char *, StringList *); 63 static void cleanup(void); 64 static void store(DB *, DBT *, DBT *, int); 65 static void killproto(DBT *); 66 static char *getstring(const char *, size_t, char **, const char *); 67 static size_t getprotoindex(StringList *, const char *); 68 static const char *getprotostr(StringList *, size_t); 69 static const char *mkaliases(StringList *, char *, size_t); 70 static void usage(void); 71 72 HASHINFO hinfo = { 73 .bsize = 256, 74 .ffactor = 4, 75 .nelem = 32768, 76 .cachesize = 1024, 77 .hash = NULL, 78 .lorder = 0 79 }; 80 81 82 int 83 main(int argc, char *argv[]) 84 { 85 DB *db; 86 int ch; 87 const char *fname = _PATH_SERVICES; 88 const char *dbname = _PATH_SERVICES_DB; 89 int warndup = 1; 90 int unique = 0; 91 int otherflag = 0; 92 int byteorder = 0; 93 size_t cnt = 0; 94 StringList *sl, ***svc; 95 size_t port, proto; 96 char *dbname_dir, *dbname_dirbuf; 97 int dbname_dir_fd = -1; 98 99 setprogname(argv[0]); 100 101 while ((ch = getopt(argc, argv, "blo:qu")) != -1) 102 switch (ch) { 103 case 'b': 104 case 'l': 105 if (byteorder != 0) 106 usage(); 107 byteorder = ch == 'b' ? 4321 : 1234; 108 break; 109 case 'q': 110 otherflag = 1; 111 warndup = 0; 112 break; 113 case 'o': 114 otherflag = 1; 115 dbname = optarg; 116 break; 117 case 'u': 118 unique++; 119 break; 120 case '?': 121 default: 122 usage(); 123 } 124 125 argc -= optind; 126 argv += optind; 127 128 if (argc > 1 || (unique && otherflag)) 129 usage(); 130 if (argc == 1) 131 fname = argv[0]; 132 133 /* Set byte order. */ 134 hinfo.lorder = byteorder; 135 136 if (unique) 137 uniq(fname); 138 139 svc = parseservices(fname, sl = sl_init()); 140 141 if (atexit(cleanup)) 142 err(1, "Cannot install exit handler"); 143 144 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 145 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL, 146 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 147 if (!db) 148 err(1, "Error opening temporary database `%s'", tname); 149 150 151 for (port = 0; port < PMASK + 1; port++) { 152 if (svc[port] == NULL) 153 continue; 154 155 for (proto = 0; proto < PROTOMAX; proto++) { 156 StringList *s; 157 if ((s = svc[port][proto]) == NULL) 158 continue; 159 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 160 } 161 162 free(svc[port]); 163 } 164 165 free(svc); 166 sl_free(sl, 1); 167 168 if ((db->close)(db)) 169 err(1, "Error closing temporary database `%s'", tname); 170 171 /* 172 * Make sure file is safe on disk. To improve performance we will call 173 * fsync() to the directory where file lies 174 */ 175 if (rename(tname, dbname) == -1 || 176 (dbname_dirbuf = strdup(dbname)) == NULL || 177 (dbname_dir = dirname(dbname_dirbuf)) == NULL || 178 (dbname_dir_fd = open(dbname_dir, O_RDONLY|O_DIRECTORY)) == -1 || 179 fsync(dbname_dir_fd) != 0) { 180 if (dbname_dir_fd != -1) 181 close(dbname_dir_fd); 182 err(1, "Cannot rename `%s' to `%s'", tname, dbname); 183 } 184 185 if (dbname_dir_fd != -1) 186 close(dbname_dir_fd); 187 188 return 0; 189 } 190 191 static void 192 add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt, 193 int warndup) 194 { 195 size_t i; 196 char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ]; 197 DBT data, key; 198 key.data = keyb; 199 data.data = datab; 200 201 #ifdef DEBUG 202 (void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto); 203 for (i = 1; i < sl->sl_cur; i++) 204 (void)printf("%s ", sl->sl_str[i]); 205 (void)printf("]\n"); 206 #endif 207 208 /* key `indirect key', data `full line' */ 209 data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1; 210 key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s", 211 sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1; 212 store(db, &data, &key, warndup); 213 214 /* key `\377port/proto', data = `indirect key' */ 215 key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s", 216 port, proto) + 1; 217 store(db, &key, &data, warndup); 218 219 /* key `\377port', data = `indirect key' */ 220 killproto(&key); 221 store(db, &key, &data, warndup); 222 223 /* add references for service and all aliases */ 224 for (i = 0; i < sl->sl_cur; i++) { 225 /* key `\376service/proto', data = `indirect key' */ 226 key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s", 227 sl->sl_str[i], proto) + 1; 228 store(db, &key, &data, warndup); 229 230 /* key `\376service', data = `indirect key' */ 231 killproto(&key); 232 store(db, &key, &data, warndup); 233 } 234 sl_free(sl, 1); 235 } 236 237 static StringList *** 238 parseservices(const char *fname, StringList *sl) 239 { 240 ssize_t len; 241 size_t linecap, line, pindex; 242 FILE *fp; 243 StringList ***svc, *s; 244 char *p, *ep; 245 246 if ((fp = fopen(fname, "r")) == NULL) 247 err(1, "Cannot open `%s'", fname); 248 249 line = linecap = 0; 250 if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL) 251 err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1)); 252 253 p = NULL; 254 while ((len = getline(&p, &linecap, fp)) != -1) { 255 char *name, *port, *proto, *aliases, *cp, *alias; 256 unsigned long pnum; 257 258 line++; 259 260 if (len == 0) 261 continue; 262 263 if (p[len - 1] == '\n') 264 p[len - 1] = '\0'; 265 266 for (cp = p; *cp && isspace((unsigned char)*cp); cp++) 267 continue; 268 269 if (*cp == '\0' || *cp == '#') 270 continue; 271 272 if ((name = getstring(fname, line, &cp, "name")) == NULL) 273 continue; 274 275 if ((port = getstring(fname, line, &cp, "port")) == NULL) 276 continue; 277 278 if (cp) { 279 for (aliases = cp; *cp && *cp != '#'; cp++) 280 continue; 281 282 if (*cp) 283 *cp = '\0'; 284 } else 285 aliases = NULL; 286 287 proto = strchr(port, '/'); 288 if (proto == NULL || proto[1] == '\0') { 289 warnx("%s, %zu: no protocol found", fname, line); 290 continue; 291 } 292 *proto++ = '\0'; 293 294 errno = 0; 295 pnum = strtoul(port, &ep, 0); 296 if (*port == '\0' || *ep != '\0') { 297 warnx("%s, %zu: invalid port `%s'", fname, line, port); 298 continue; 299 } 300 if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) { 301 warnx("%s, %zu: port too big `%s'", fname, line, port); 302 continue; 303 } 304 305 if (svc[pnum] == NULL) { 306 svc[pnum] = calloc(PROTOMAX, sizeof(StringList *)); 307 if (svc[pnum] == NULL) 308 err(1, "Cannot allocate %zu bytes", 309 (size_t)PROTOMAX); 310 } 311 312 pindex = getprotoindex(sl, proto); 313 if (svc[pnum][pindex] == NULL) 314 s = svc[pnum][pindex] = sl_init(); 315 else 316 s = svc[pnum][pindex]; 317 318 /* build list of aliases */ 319 if (sl_find(s, name) == NULL) { 320 char *p2; 321 322 if ((p2 = strdup(name)) == NULL) 323 err(1, "Cannot copy string"); 324 (void)sl_add(s, p2); 325 } 326 327 if (aliases) { 328 while ((alias = strsep(&aliases, " \t")) != NULL) { 329 if (alias[0] == '\0') 330 continue; 331 if (sl_find(s, alias) == NULL) { 332 char *p2; 333 334 if ((p2 = strdup(alias)) == NULL) 335 err(1, "Cannot copy string"); 336 (void)sl_add(s, p2); 337 } 338 } 339 } 340 } 341 (void)fclose(fp); 342 return svc; 343 } 344 345 /* 346 * cleanup(): Remove temporary files upon exit 347 */ 348 static void 349 cleanup(void) 350 { 351 if (tname[0]) 352 (void)unlink(tname); 353 } 354 355 static char * 356 getstring(const char *fname, size_t line, char **cp, const char *tag) 357 { 358 char *str; 359 360 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 361 continue; 362 363 if (str == NULL) 364 warnx("%s, %zu: no %s found", fname, line, tag); 365 366 return str; 367 } 368 369 static void 370 killproto(DBT *key) 371 { 372 char *p, *d = key->data; 373 374 if ((p = strchr(d, '/')) == NULL) 375 abort(); 376 *p++ = '\0'; 377 key->size = p - d; 378 } 379 380 static void 381 store(DB *db, DBT *key, DBT *data, int warndup) 382 { 383 #ifdef DEBUG 384 int k = key->size - 1; 385 int d = data->size - 1; 386 (void)printf("store [%*.*s] [%*.*s]\n", 387 k, k, (char *)key->data + 1, 388 d, d, (char *)data->data + 1); 389 #endif 390 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 391 case 0: 392 break; 393 case 1: 394 if (warndup) 395 warnx("duplicate service `%s'", 396 &((char *)key->data)[1]); 397 break; 398 case -1: 399 err(1, "put"); 400 break; 401 default: 402 abort(); 403 break; 404 } 405 } 406 407 static size_t 408 getprotoindex(StringList *sl, const char *str) 409 { 410 size_t i; 411 char *p; 412 413 for (i= 0; i < sl->sl_cur; i++) 414 if (strcmp(sl->sl_str[i], str) == 0) 415 return i; 416 417 if (i == PROTOMAX) 418 errx(1, "Ran out of protocols adding `%s';" 419 " recompile with larger PROTOMAX", str); 420 if ((p = strdup(str)) == NULL) 421 err(1, "Cannot copy string"); 422 (void)sl_add(sl, p); 423 return i; 424 } 425 426 static const char * 427 getprotostr(StringList *sl, size_t i) 428 { 429 assert(i < sl->sl_cur); 430 return sl->sl_str[i]; 431 } 432 433 static const char * 434 mkaliases(StringList *sl, char *buf, size_t len) 435 { 436 size_t nc, i, pos; 437 438 buf[0] = 0; 439 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 440 nc = strlcpy(buf + pos, sl->sl_str[i], len); 441 if (nc >= len) 442 goto out; 443 pos += nc; 444 len -= nc; 445 nc = strlcpy(buf + pos, " ", len); 446 if (nc >= len) 447 goto out; 448 pos += nc; 449 len -= nc; 450 } 451 return buf; 452 out: 453 warn("aliases for `%s' truncated", sl->sl_str[0]); 454 return buf; 455 } 456 457 static void 458 usage(void) 459 { 460 (void)fprintf(stderr, 461 "Usage:\t%s [-b | -l] [-q] [-o <db>] [<servicefile>]\n" 462 "\t%s -u [<servicefile>]\n", getprogname(), getprogname()); 463 exit(1); 464 } 465