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/param.h> 35 #include <sys/stat.h> 36 37 #include <assert.h> 38 #include <db.h> 39 #include <err.h> 40 #include <fcntl.h> 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 #include <libgen.h> 47 #include <ctype.h> 48 #include <errno.h> 49 #include <stringlist.h> 50 51 #include "extern.h" 52 53 static char tname[MAXPATHLEN]; 54 55 #define PMASK 0xffff 56 #define PROTOMAX 6 57 58 static void add(DB *, StringList *, size_t, const char *, size_t *, int); 59 static StringList ***parseservices(const char *, StringList *); 60 static void cleanup(void); 61 static void store(DB *, DBT *, DBT *, int); 62 static void killproto(DBT *); 63 static char *getstring(const char *, size_t, char **, const char *); 64 static size_t getprotoindex(StringList *, const char *); 65 static const char *getprotostr(StringList *, size_t); 66 static const char *mkaliases(StringList *, char *, size_t); 67 static void usage(void); 68 69 HASHINFO hinfo = { 70 .bsize = 256, 71 .ffactor = 4, 72 .nelem = 32768, 73 .cachesize = 1024, 74 .hash = NULL, 75 .lorder = 0 76 }; 77 78 79 int 80 main(int argc, char *argv[]) 81 { 82 DB *db; 83 int ch; 84 const char *fname = _PATH_SERVICES; 85 const char *dbname = _PATH_SERVICES_DB; 86 int warndup = 1; 87 int unique = 0; 88 int otherflag = 0; 89 int byteorder = 0; 90 size_t cnt = 0; 91 StringList *sl, ***svc; 92 size_t port, proto; 93 char *dbname_dir, *dbname_dirbuf; 94 int dbname_dir_fd = -1; 95 96 setprogname(argv[0]); 97 98 while ((ch = getopt(argc, argv, "blo:qu")) != -1) 99 switch (ch) { 100 case 'b': 101 case 'l': 102 if (byteorder != 0) 103 usage(); 104 byteorder = ch == 'b' ? 4321 : 1234; 105 break; 106 case 'q': 107 otherflag = 1; 108 warndup = 0; 109 break; 110 case 'o': 111 otherflag = 1; 112 dbname = optarg; 113 break; 114 case 'u': 115 unique++; 116 break; 117 case '?': 118 default: 119 usage(); 120 } 121 122 argc -= optind; 123 argv += optind; 124 125 if (argc > 1 || (unique && otherflag)) 126 usage(); 127 if (argc == 1) 128 fname = argv[0]; 129 130 /* Set byte order. */ 131 hinfo.lorder = byteorder; 132 133 if (unique) 134 uniq(fname); 135 136 svc = parseservices(fname, sl = sl_init()); 137 138 if (atexit(cleanup)) 139 err(1, "Cannot install exit handler"); 140 141 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 142 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL, 143 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 144 if (!db) 145 err(1, "Error opening temporary database `%s'", tname); 146 147 148 for (port = 0; port < PMASK + 1; port++) { 149 if (svc[port] == NULL) 150 continue; 151 152 for (proto = 0; proto < PROTOMAX; proto++) { 153 StringList *s; 154 if ((s = svc[port][proto]) == NULL) 155 continue; 156 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 157 } 158 159 free(svc[port]); 160 } 161 162 free(svc); 163 sl_free(sl, 1); 164 165 if ((db->close)(db)) 166 err(1, "Error closing temporary database `%s'", tname); 167 168 /* 169 * Make sure file is safe on disk. To improve performance we will call 170 * fsync() to the directory where file lies 171 */ 172 if (rename(tname, dbname) == -1 || 173 (dbname_dirbuf = strdup(dbname)) == NULL || 174 (dbname_dir = dirname(dbname_dirbuf)) == NULL || 175 (dbname_dir_fd = open(dbname_dir, O_RDONLY|O_DIRECTORY)) == -1 || 176 fsync(dbname_dir_fd) != 0) { 177 if (dbname_dir_fd != -1) 178 close(dbname_dir_fd); 179 err(1, "Cannot rename `%s' to `%s'", tname, dbname); 180 } 181 182 if (dbname_dir_fd != -1) 183 close(dbname_dir_fd); 184 185 return 0; 186 } 187 188 static void 189 add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt, 190 int warndup) 191 { 192 size_t i; 193 char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ]; 194 DBT data, key; 195 key.data = keyb; 196 data.data = datab; 197 198 #ifdef DEBUG 199 (void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto); 200 for (i = 1; i < sl->sl_cur; i++) 201 (void)printf("%s ", sl->sl_str[i]); 202 (void)printf("]\n"); 203 #endif 204 205 /* key `indirect key', data `full line' */ 206 data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1; 207 key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s", 208 sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1; 209 store(db, &data, &key, warndup); 210 211 /* key `\377port/proto', data = `indirect key' */ 212 key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s", 213 port, proto) + 1; 214 store(db, &key, &data, warndup); 215 216 /* key `\377port', data = `indirect key' */ 217 killproto(&key); 218 store(db, &key, &data, warndup); 219 220 /* add references for service and all aliases */ 221 for (i = 0; i < sl->sl_cur; i++) { 222 /* key `\376service/proto', data = `indirect key' */ 223 key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s", 224 sl->sl_str[i], proto) + 1; 225 store(db, &key, &data, warndup); 226 227 /* key `\376service', data = `indirect key' */ 228 killproto(&key); 229 store(db, &key, &data, warndup); 230 } 231 sl_free(sl, 1); 232 } 233 234 static StringList *** 235 parseservices(const char *fname, StringList *sl) 236 { 237 ssize_t len; 238 size_t linecap, 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 = linecap = 0; 247 if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL) 248 err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1)); 249 250 p = NULL; 251 while ((len = getline(&p, &linecap, fp)) != -1) { 252 char *name, *port, *proto, *aliases, *cp, *alias; 253 unsigned long pnum; 254 255 line++; 256 257 if (len == 0) 258 continue; 259 260 if (p[len - 1] == '\n') 261 p[len - 1] = '\0'; 262 263 for (cp = p; *cp && isspace((unsigned char)*cp); cp++) 264 continue; 265 266 if (*cp == '\0' || *cp == '#') 267 continue; 268 269 if ((name = getstring(fname, line, &cp, "name")) == NULL) 270 continue; 271 272 if ((port = getstring(fname, line, &cp, "port")) == NULL) 273 continue; 274 275 if (cp) { 276 for (aliases = cp; *cp && *cp != '#'; cp++) 277 continue; 278 279 if (*cp) 280 *cp = '\0'; 281 } else 282 aliases = NULL; 283 284 proto = strchr(port, '/'); 285 if (proto == NULL || proto[1] == '\0') { 286 warnx("%s, %zu: no protocol found", fname, line); 287 continue; 288 } 289 *proto++ = '\0'; 290 291 errno = 0; 292 pnum = strtoul(port, &ep, 0); 293 if (*port == '\0' || *ep != '\0') { 294 warnx("%s, %zu: invalid port `%s'", fname, line, port); 295 continue; 296 } 297 if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) { 298 warnx("%s, %zu: port too big `%s'", fname, line, port); 299 continue; 300 } 301 302 if (svc[pnum] == NULL) { 303 svc[pnum] = calloc(PROTOMAX, sizeof(StringList *)); 304 if (svc[pnum] == NULL) 305 err(1, "Cannot allocate %zu bytes", 306 (size_t)PROTOMAX); 307 } 308 309 pindex = getprotoindex(sl, proto); 310 if (svc[pnum][pindex] == NULL) 311 s = svc[pnum][pindex] = sl_init(); 312 else 313 s = svc[pnum][pindex]; 314 315 /* build list of aliases */ 316 if (sl_find(s, name) == NULL) { 317 char *p2; 318 319 if ((p2 = strdup(name)) == NULL) 320 err(1, "Cannot copy string"); 321 (void)sl_add(s, p2); 322 } 323 324 if (aliases) { 325 while ((alias = strsep(&aliases, " \t")) != NULL) { 326 if (alias[0] == '\0') 327 continue; 328 if (sl_find(s, alias) == NULL) { 329 char *p2; 330 331 if ((p2 = strdup(alias)) == NULL) 332 err(1, "Cannot copy string"); 333 (void)sl_add(s, p2); 334 } 335 } 336 } 337 } 338 (void)fclose(fp); 339 return svc; 340 } 341 342 /* 343 * cleanup(): Remove temporary files upon exit 344 */ 345 static void 346 cleanup(void) 347 { 348 if (tname[0]) 349 (void)unlink(tname); 350 } 351 352 static char * 353 getstring(const char *fname, size_t line, char **cp, const char *tag) 354 { 355 char *str; 356 357 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 358 continue; 359 360 if (str == NULL) 361 warnx("%s, %zu: no %s found", fname, line, tag); 362 363 return str; 364 } 365 366 static void 367 killproto(DBT *key) 368 { 369 char *p, *d = key->data; 370 371 if ((p = strchr(d, '/')) == NULL) 372 abort(); 373 *p++ = '\0'; 374 key->size = p - d; 375 } 376 377 static void 378 store(DB *db, DBT *key, DBT *data, int warndup) 379 { 380 #ifdef DEBUG 381 int k = key->size - 1; 382 int d = data->size - 1; 383 (void)printf("store [%*.*s] [%*.*s]\n", 384 k, k, (char *)key->data + 1, 385 d, d, (char *)data->data + 1); 386 #endif 387 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 388 case 0: 389 break; 390 case 1: 391 if (warndup) 392 warnx("duplicate service `%s'", 393 &((char *)key->data)[1]); 394 break; 395 case -1: 396 err(1, "put"); 397 break; 398 default: 399 abort(); 400 break; 401 } 402 } 403 404 static size_t 405 getprotoindex(StringList *sl, const char *str) 406 { 407 size_t i; 408 char *p; 409 410 for (i= 0; i < sl->sl_cur; i++) 411 if (strcmp(sl->sl_str[i], str) == 0) 412 return i; 413 414 if (i == PROTOMAX) 415 errx(1, "Ran out of protocols adding `%s';" 416 " recompile with larger PROTOMAX", str); 417 if ((p = strdup(str)) == NULL) 418 err(1, "Cannot copy string"); 419 (void)sl_add(sl, p); 420 return i; 421 } 422 423 static const char * 424 getprotostr(StringList *sl, size_t i) 425 { 426 assert(i < sl->sl_cur); 427 return sl->sl_str[i]; 428 } 429 430 static const char * 431 mkaliases(StringList *sl, char *buf, size_t len) 432 { 433 size_t nc, i, pos; 434 435 buf[0] = 0; 436 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 437 nc = strlcpy(buf + pos, sl->sl_str[i], len); 438 if (nc >= len) 439 goto out; 440 pos += nc; 441 len -= nc; 442 nc = strlcpy(buf + pos, " ", len); 443 if (nc >= len) 444 goto out; 445 pos += nc; 446 len -= nc; 447 } 448 return buf; 449 out: 450 warn("aliases for `%s' truncated", sl->sl_str[0]); 451 return buf; 452 } 453 454 static void 455 usage(void) 456 { 457 (void)fprintf(stderr, 458 "Usage:\t%s [-b | -l] [-q] [-o <db>] [<servicefile>]\n" 459 "\t%s -u [<servicefile>]\n", getprogname(), getprogname()); 460 exit(1); 461 } 462