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 #ifndef lint 34 __RCSID("$NetBSD: services_mkdb.c,v 1.14 2008/04/28 20:24:17 martin Exp $"); 35 #endif /* not lint */ 36 37 #include <sys/param.h> 38 39 #include <assert.h> 40 #include <db.h> 41 #include <err.h> 42 #include <fcntl.h> 43 #include <netdb.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 #include <util.h> 49 #include <ctype.h> 50 #include <errno.h> 51 #include <stringlist.h> 52 53 static char tname[MAXPATHLEN]; 54 55 #define PMASK 0xffff 56 #define PROTOMAX 5 57 58 extern void uniq(const char *); 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) __dead; 70 71 const 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 size_t cnt = 0; 92 StringList *sl, ***svc; 93 size_t port, proto; 94 95 setprogname(argv[0]); 96 97 while ((ch = getopt(argc, argv, "qo:u")) != -1) 98 switch (ch) { 99 case 'q': 100 otherflag = 1; 101 warndup = 0; 102 break; 103 case 'o': 104 otherflag = 1; 105 dbname = optarg; 106 break; 107 case 'u': 108 unique++; 109 break; 110 case '?': 111 default: 112 usage(); 113 } 114 115 argc -= optind; 116 argv += optind; 117 118 if (argc > 1 || (unique && otherflag)) 119 usage(); 120 if (argc == 1) 121 fname = argv[0]; 122 123 if (unique) 124 uniq(fname); 125 126 svc = parseservices(fname, sl = sl_init()); 127 128 if (atexit(cleanup)) 129 err(1, "Cannot install exit handler"); 130 131 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 132 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL, 133 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 134 if (!db) 135 err(1, "Error opening temporary database `%s'", tname); 136 137 138 for (port = 0; port < PMASK + 1; port++) { 139 if (svc[port] == NULL) 140 continue; 141 142 for (proto = 0; proto < PROTOMAX; proto++) { 143 StringList *s; 144 if ((s = svc[port][proto]) == NULL) 145 continue; 146 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 147 } 148 149 free(svc[port]); 150 } 151 152 free(svc); 153 sl_free(sl, 1); 154 155 if ((db->close)(db)) 156 err(1, "Error closing temporary database `%s'", tname); 157 158 if (rename(tname, dbname) == -1) 159 err(1, "Cannot rename `%s' to `%s'", tname, dbname); 160 161 return 0; 162 } 163 164 static void 165 add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt, 166 int warndup) 167 { 168 size_t i; 169 char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ]; 170 DBT data, key; 171 key.data = keyb; 172 data.data = datab; 173 174 #ifdef DEBUG 175 (void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto); 176 for (i = 1; i < sl->sl_cur; i++) 177 (void)printf("%s ", sl->sl_str[i]); 178 (void)printf("]\n"); 179 #endif 180 181 /* key `indirect key', data `full line' */ 182 data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1; 183 key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s", 184 sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1; 185 store(db, &data, &key, warndup); 186 187 /* key `\377port/proto', data = `indirect key' */ 188 key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s", 189 port, proto) + 1; 190 store(db, &key, &data, warndup); 191 192 /* key `\377port', data = `indirect key' */ 193 killproto(&key); 194 store(db, &key, &data, warndup); 195 196 /* add references for service and all aliases */ 197 for (i = 0; i < sl->sl_cur; i++) { 198 /* key `\376service/proto', data = `indirect key' */ 199 key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s", 200 sl->sl_str[i], proto) + 1; 201 store(db, &key, &data, warndup); 202 203 /* key `\376service', data = `indirect key' */ 204 killproto(&key); 205 store(db, &key, &data, warndup); 206 } 207 sl_free(sl, 1); 208 } 209 210 static StringList *** 211 parseservices(const char *fname, StringList *sl) 212 { 213 size_t len, line, pindex; 214 FILE *fp; 215 StringList ***svc, *s; 216 char *p, *ep; 217 218 if ((fp = fopen(fname, "r")) == NULL) 219 err(1, "Cannot open `%s'", fname); 220 221 line = 0; 222 svc = ecalloc(PMASK + 1, sizeof(StringList **)); 223 224 /* XXX: change NULL to "\0\0#" when fparseln fixed */ 225 for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) { 226 char *name, *port, *proto, *aliases, *cp, *alias; 227 unsigned long pnum; 228 229 if (len == 0) 230 continue; 231 232 for (cp = p; *cp && isspace((unsigned char)*cp); cp++) 233 continue; 234 235 if (*cp == '\0' || *cp == '#') 236 continue; 237 238 if ((name = getstring(fname, line, &cp, "name")) == NULL) 239 continue; 240 241 if ((port = getstring(fname, line, &cp, "port")) == NULL) 242 continue; 243 244 if (cp) { 245 for (aliases = cp; *cp && *cp != '#'; cp++) 246 continue; 247 248 if (*cp) 249 *cp = '\0'; 250 } else 251 aliases = NULL; 252 253 proto = strchr(port, '/'); 254 if (proto == NULL || proto[1] == '\0') { 255 warnx("%s, %zu: no protocol found", fname, line); 256 continue; 257 } 258 *proto++ = '\0'; 259 260 errno = 0; 261 pnum = strtoul(port, &ep, 0); 262 if (*port == '\0' || *ep != '\0') { 263 warnx("%s, %zu: invalid port `%s'", fname, line, port); 264 continue; 265 } 266 if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) { 267 warnx("%s, %zu: port too big `%s'", fname, line, port); 268 continue; 269 } 270 271 if (svc[pnum] == NULL) 272 svc[pnum] = ecalloc(PROTOMAX, sizeof(StringList *)); 273 274 pindex = getprotoindex(sl, proto); 275 if (svc[pnum][pindex] == NULL) 276 s = svc[pnum][pindex] = sl_init(); 277 else 278 s = svc[pnum][pindex]; 279 280 /* build list of aliases */ 281 if (sl_find(s, name) == NULL) 282 (void)sl_add(s, estrdup(name)); 283 284 if (aliases) { 285 while ((alias = strsep(&aliases, " \t")) != NULL) { 286 if (alias[0] == '\0') 287 continue; 288 if (sl_find(s, alias) == NULL) 289 (void)sl_add(s, estrdup(alias)); 290 } 291 } 292 } 293 (void)fclose(fp); 294 return svc; 295 } 296 297 /* 298 * cleanup(): Remove temporary files upon exit 299 */ 300 static void 301 cleanup(void) 302 { 303 if (tname[0]) 304 (void)unlink(tname); 305 } 306 307 static char * 308 getstring(const char *fname, size_t line, char **cp, const char *tag) 309 { 310 char *str; 311 312 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 313 continue; 314 315 if (str == NULL) 316 warnx("%s, %zu: no %s found", fname, line, tag); 317 318 return str; 319 } 320 321 static void 322 killproto(DBT *key) 323 { 324 char *p, *d = key->data; 325 326 if ((p = strchr(d, '/')) == NULL) 327 abort(); 328 *p++ = '\0'; 329 key->size = p - d; 330 } 331 332 static void 333 store(DB *db, DBT *key, DBT *data, int warndup) 334 { 335 #ifdef DEBUG 336 int k = key->size - 1; 337 int d = data->size - 1; 338 (void)printf("store [%*.*s] [%*.*s]\n", 339 k, k, (char *)key->data + 1, 340 d, d, (char *)data->data + 1); 341 #endif 342 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 343 case 0: 344 break; 345 case 1: 346 if (warndup) 347 warnx("duplicate service `%s'", 348 &((char *)key->data)[1]); 349 break; 350 case -1: 351 err(1, "put"); 352 break; 353 default: 354 abort(); 355 break; 356 } 357 } 358 359 static size_t 360 getprotoindex(StringList *sl, const char *str) 361 { 362 size_t i; 363 364 for (i= 0; i < sl->sl_cur; i++) 365 if (strcmp(sl->sl_str[i], str) == 0) 366 return i; 367 368 if (i == PROTOMAX) 369 errx(1, "Ran out of protocols adding `%s';" 370 " recompile with larger PROTOMAX", str); 371 (void)sl_add(sl, estrdup(str)); 372 return i; 373 } 374 375 static const char * 376 getprotostr(StringList *sl, size_t i) 377 { 378 assert(i < sl->sl_cur); 379 return sl->sl_str[i]; 380 } 381 382 static const char * 383 mkaliases(StringList *sl, char *buf, size_t len) 384 { 385 size_t nc, i, pos; 386 387 buf[0] = 0; 388 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 389 nc = strlcpy(buf + pos, sl->sl_str[i], len); 390 if (nc >= len) 391 goto out; 392 pos += nc; 393 len -= nc; 394 nc = strlcpy(buf + pos, " ", len); 395 if (nc >= len) 396 goto out; 397 pos += nc; 398 len -= nc; 399 } 400 return buf; 401 out: 402 warn("aliases for `%s' truncated", sl->sl_str[0]); 403 return buf; 404 } 405 406 static void 407 usage(void) 408 { 409 (void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [<servicefile>]\n" 410 "\t%s -u [<servicefile>]\n", getprogname(), getprogname()); 411 exit(1); 412 } 413