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 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 #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 <ctype.h> 49 #include <errno.h> 50 #include <stringlist.h> 51 52 #include "extern.h" 53 54 static char tname[MAXPATHLEN]; 55 56 #define PMASK 0xffff 57 #define PROTOMAX 6 58 59 static void add(DB *, StringList *, size_t, const char *, size_t *, int); 60 static StringList ***parseservices(const char *, StringList *); 61 static void cleanup(void); 62 static void store(DB *, DBT *, DBT *, int); 63 static void killproto(DBT *); 64 static char *getstring(const char *, size_t, char **, const char *); 65 static size_t getprotoindex(StringList *, const char *); 66 static const char *getprotostr(StringList *, size_t); 67 static const char *mkaliases(StringList *, char *, size_t); 68 static void usage(void); 69 70 HASHINFO hinfo = { 71 .bsize = 256, 72 .ffactor = 4, 73 .nelem = 32768, 74 .cachesize = 1024, 75 .hash = NULL, 76 .lorder = 0 77 }; 78 79 80 int 81 main(int argc, char *argv[]) 82 { 83 DB *db; 84 int ch; 85 const char *fname = _PATH_SERVICES; 86 const char *dbname = _PATH_SERVICES_DB; 87 int warndup = 1; 88 int unique = 0; 89 int otherflag = 0; 90 int byteorder = 0; 91 size_t cnt = 0; 92 StringList *sl, ***svc; 93 size_t port, proto; 94 char *dbname_dir, *dbname_dirbuf; 95 int dbname_dir_fd = -1; 96 97 setprogname(argv[0]); 98 99 while ((ch = getopt(argc, argv, "blo:qu")) != -1) 100 switch (ch) { 101 case 'b': 102 case 'l': 103 if (byteorder != 0) 104 usage(); 105 byteorder = ch == 'b' ? 4321 : 1234; 106 break; 107 case 'q': 108 otherflag = 1; 109 warndup = 0; 110 break; 111 case 'o': 112 otherflag = 1; 113 dbname = optarg; 114 break; 115 case 'u': 116 unique++; 117 break; 118 case '?': 119 default: 120 usage(); 121 } 122 123 argc -= optind; 124 argv += optind; 125 126 if (argc > 1 || (unique && otherflag)) 127 usage(); 128 if (argc == 1) 129 fname = argv[0]; 130 131 /* Set byte order. */ 132 hinfo.lorder = byteorder; 133 134 if (unique) 135 uniq(fname); 136 137 svc = parseservices(fname, sl = sl_init()); 138 139 if (atexit(cleanup)) 140 err(1, "Cannot install exit handler"); 141 142 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 143 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL, 144 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 145 if (!db) 146 err(1, "Error opening temporary database `%s'", tname); 147 148 149 for (port = 0; port < PMASK + 1; port++) { 150 if (svc[port] == NULL) 151 continue; 152 153 for (proto = 0; proto < PROTOMAX; proto++) { 154 StringList *s; 155 if ((s = svc[port][proto]) == NULL) 156 continue; 157 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 158 } 159 160 free(svc[port]); 161 } 162 163 free(svc); 164 sl_free(sl, 1); 165 166 if ((db->close)(db)) 167 err(1, "Error closing temporary database `%s'", tname); 168 169 /* 170 * Make sure file is safe on disk. To improve performance we will call 171 * fsync() to the directory where file lies 172 */ 173 if (rename(tname, dbname) == -1 || 174 (dbname_dirbuf = strdup(dbname)) == NULL || 175 (dbname_dir = dirname(dbname_dirbuf)) == 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 ssize_t len; 239 size_t linecap, line, pindex; 240 FILE *fp; 241 StringList ***svc, *s; 242 char *p, *ep; 243 244 if ((fp = fopen(fname, "r")) == NULL) 245 err(1, "Cannot open `%s'", fname); 246 247 line = linecap = 0; 248 if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL) 249 err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1)); 250 251 p = NULL; 252 while ((len = getline(&p, &linecap, fp)) != -1) { 253 char *name, *port, *proto, *aliases, *cp, *alias; 254 unsigned long pnum; 255 256 line++; 257 258 if (len == 0) 259 continue; 260 261 if (p[len - 1] == '\n') 262 p[len - 1] = '\0'; 263 264 for (cp = p; *cp && isspace((unsigned char)*cp); cp++) 265 continue; 266 267 if (*cp == '\0' || *cp == '#') 268 continue; 269 270 if ((name = getstring(fname, line, &cp, "name")) == NULL) 271 continue; 272 273 if ((port = getstring(fname, line, &cp, "port")) == NULL) 274 continue; 275 276 if (cp) { 277 for (aliases = cp; *cp && *cp != '#'; cp++) 278 continue; 279 280 if (*cp) 281 *cp = '\0'; 282 } else 283 aliases = NULL; 284 285 proto = strchr(port, '/'); 286 if (proto == NULL || proto[1] == '\0') { 287 warnx("%s, %zu: no protocol found", fname, line); 288 continue; 289 } 290 *proto++ = '\0'; 291 292 errno = 0; 293 pnum = strtoul(port, &ep, 0); 294 if (*port == '\0' || *ep != '\0') { 295 warnx("%s, %zu: invalid port `%s'", fname, line, port); 296 continue; 297 } 298 if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) { 299 warnx("%s, %zu: port too big `%s'", fname, line, port); 300 continue; 301 } 302 303 if (svc[pnum] == NULL) { 304 svc[pnum] = calloc(PROTOMAX, sizeof(StringList *)); 305 if (svc[pnum] == NULL) 306 err(1, "Cannot allocate %zu bytes", 307 (size_t)PROTOMAX); 308 } 309 310 pindex = getprotoindex(sl, proto); 311 if (svc[pnum][pindex] == NULL) 312 s = svc[pnum][pindex] = sl_init(); 313 else 314 s = svc[pnum][pindex]; 315 316 /* build list of aliases */ 317 if (sl_find(s, name) == NULL) { 318 char *p2; 319 320 if ((p2 = strdup(name)) == NULL) 321 err(1, "Cannot copy string"); 322 (void)sl_add(s, p2); 323 } 324 325 if (aliases) { 326 while ((alias = strsep(&aliases, " \t")) != NULL) { 327 if (alias[0] == '\0') 328 continue; 329 if (sl_find(s, alias) == NULL) { 330 char *p2; 331 332 if ((p2 = strdup(alias)) == NULL) 333 err(1, "Cannot copy string"); 334 (void)sl_add(s, p2); 335 } 336 } 337 } 338 } 339 (void)fclose(fp); 340 return svc; 341 } 342 343 /* 344 * cleanup(): Remove temporary files upon exit 345 */ 346 static void 347 cleanup(void) 348 { 349 if (tname[0]) 350 (void)unlink(tname); 351 } 352 353 static char * 354 getstring(const char *fname, size_t line, char **cp, const char *tag) 355 { 356 char *str; 357 358 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 359 continue; 360 361 if (str == NULL) 362 warnx("%s, %zu: no %s found", fname, line, tag); 363 364 return str; 365 } 366 367 static void 368 killproto(DBT *key) 369 { 370 char *p, *d = key->data; 371 372 if ((p = strchr(d, '/')) == NULL) 373 abort(); 374 *p++ = '\0'; 375 key->size = p - d; 376 } 377 378 static void 379 store(DB *db, DBT *key, DBT *data, int warndup) 380 { 381 #ifdef DEBUG 382 int k = key->size - 1; 383 int d = data->size - 1; 384 (void)printf("store [%*.*s] [%*.*s]\n", 385 k, k, (char *)key->data + 1, 386 d, d, (char *)data->data + 1); 387 #endif 388 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 389 case 0: 390 break; 391 case 1: 392 if (warndup) 393 warnx("duplicate service `%s'", 394 &((char *)key->data)[1]); 395 break; 396 case -1: 397 err(1, "put"); 398 break; 399 default: 400 abort(); 401 break; 402 } 403 } 404 405 static size_t 406 getprotoindex(StringList *sl, const char *str) 407 { 408 size_t i; 409 char *p; 410 411 for (i= 0; i < sl->sl_cur; i++) 412 if (strcmp(sl->sl_str[i], str) == 0) 413 return i; 414 415 if (i == PROTOMAX) 416 errx(1, "Ran out of protocols adding `%s';" 417 " recompile with larger PROTOMAX", str); 418 if ((p = strdup(str)) == NULL) 419 err(1, "Cannot copy string"); 420 (void)sl_add(sl, p); 421 return i; 422 } 423 424 static const char * 425 getprotostr(StringList *sl, size_t i) 426 { 427 assert(i < sl->sl_cur); 428 return sl->sl_str[i]; 429 } 430 431 static const char * 432 mkaliases(StringList *sl, char *buf, size_t len) 433 { 434 size_t nc, i, pos; 435 436 buf[0] = 0; 437 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 438 nc = strlcpy(buf + pos, sl->sl_str[i], len); 439 if (nc >= len) 440 goto out; 441 pos += nc; 442 len -= nc; 443 nc = strlcpy(buf + pos, " ", len); 444 if (nc >= len) 445 goto out; 446 pos += nc; 447 len -= nc; 448 } 449 return buf; 450 out: 451 warn("aliases for `%s' truncated", sl->sl_str[0]); 452 return buf; 453 } 454 455 static void 456 usage(void) 457 { 458 (void)fprintf(stderr, 459 "Usage:\t%s [-b | -l] [-q] [-o <db>] [<servicefile>]\n" 460 "\t%s -u [<servicefile>]\n", getprogname(), getprogname()); 461 exit(1); 462 } 463