services_mkdb.c revision 1.9
1 /* $NetBSD: services_mkdb.c,v 1.9 2007/05/15 19:57:40 christos 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __RCSID("$NetBSD: services_mkdb.c,v 1.9 2007/05/15 19:57:40 christos Exp $"); 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 46 #include <assert.h> 47 #include <db.h> 48 #include <err.h> 49 #include <fcntl.h> 50 #include <netdb.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 #include <util.h> 56 #include <ctype.h> 57 #include <errno.h> 58 #include <stringlist.h> 59 60 static char tname[MAXPATHLEN]; 61 62 #define PMASK 0xffff 63 #define PROTOMAX 5 64 65 static void add(DB *, StringList *, size_t, const char *, size_t *, int); 66 static StringList ***parseservices(const char *, StringList *); 67 static void cleanup(void); 68 static void store(DB *, DBT *, DBT *, int); 69 static void killproto(DBT *); 70 static char *getstring(const char *, size_t, char **, const char *); 71 static size_t getprotoindex(StringList *, const char *); 72 static const char *getprotostr(StringList *, size_t); 73 static const char *mkaliases(StringList *, char *, size_t); 74 static void usage(void) __attribute__((__noreturn__)); 75 76 static const HASHINFO hinfo = { 77 .bsize = 256, 78 .ffactor = 4, 79 .nelem = 32768, 80 .cachesize = 1024, 81 .hash = NULL, 82 .lorder = 0 83 }; 84 85 86 int 87 main(int argc, char *argv[]) 88 { 89 DB *db; 90 int ch; 91 const char *fname = _PATH_SERVICES; 92 const char *dbname = _PATH_SERVICES_DB; 93 int warndup = 1; 94 size_t cnt = 0; 95 StringList *sl, ***svc; 96 size_t port, proto; 97 98 setprogname(argv[0]); 99 100 while ((ch = getopt(argc, argv, "qo:")) != -1) 101 switch (ch) { 102 case 'q': 103 warndup = 0; 104 break; 105 case 'o': 106 dbname = optarg; 107 break; 108 case '?': 109 default: 110 usage(); 111 } 112 113 argc -= optind; 114 argv += optind; 115 116 if (argc > 1) 117 usage(); 118 if (argc == 1) 119 fname = argv[0]; 120 121 svc = parseservices(fname, sl = sl_init()); 122 123 if (atexit(cleanup)) 124 err(1, "Cannot install exit handler"); 125 126 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 127 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL, 128 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 129 if (!db) 130 err(1, "Error opening temporary database `%s'", tname); 131 132 133 for (port = 0; port < PMASK + 1; port++) { 134 if (svc[port] == NULL) 135 continue; 136 137 for (proto = 0; proto < PROTOMAX; proto++) { 138 StringList *s; 139 if ((s = svc[port][proto]) == NULL) 140 continue; 141 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 142 } 143 144 free(svc[port]); 145 } 146 147 free(svc); 148 sl_free(sl, 1); 149 150 if ((db->close)(db)) 151 err(1, "Error closing temporary database `%s'", tname); 152 153 if (rename(tname, dbname) == -1) 154 err(1, "Cannot rename `%s' to `%s'", tname, dbname); 155 156 return 0; 157 } 158 159 static void 160 add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt, 161 int warndup) 162 { 163 size_t i; 164 char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ]; 165 DBT data, key; 166 key.data = keyb; 167 data.data = datab; 168 169 #ifdef DEBUG 170 (void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto); 171 for (i = 1; i < sl->sl_cur; i++) 172 (void)printf("%s ", sl->sl_str[i]); 173 (void)printf("]\n"); 174 #endif 175 176 /* key `indirect key', data `full line' */ 177 data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1; 178 key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s", 179 sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1; 180 store(db, &data, &key, warndup); 181 182 /* key `\377port/proto', data = `indirect key' */ 183 key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s", 184 port, proto) + 1; 185 store(db, &key, &data, warndup); 186 187 /* key `\377port', data = `indirect key' */ 188 killproto(&key); 189 store(db, &key, &data, warndup); 190 191 /* add references for service and all aliases */ 192 for (i = 0; i < sl->sl_cur; i++) { 193 /* key `\376service/proto', data = `indirect key' */ 194 key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s", 195 sl->sl_str[i], proto) + 1; 196 store(db, &key, &data, warndup); 197 198 /* key `\376service', data = `indirect key' */ 199 killproto(&key); 200 store(db, &key, &data, warndup); 201 } 202 sl_free(sl, 1); 203 } 204 205 static StringList *** 206 parseservices(const char *fname, StringList *sl) 207 { 208 size_t len, line, pindex; 209 FILE *fp; 210 StringList ***svc, *s; 211 char *p, *ep; 212 213 if ((fp = fopen(fname, "r")) == NULL) 214 err(1, "Cannot open `%s'", fname); 215 216 line = 0; 217 svc = ecalloc(PMASK + 1, sizeof(StringList **)); 218 219 /* XXX: change NULL to "\0\0#" when fparseln fixed */ 220 for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) { 221 char *name, *port, *proto, *aliases, *cp, *alias; 222 unsigned long pnum; 223 224 if (len == 0) 225 continue; 226 227 for (cp = p; *cp && isspace((unsigned char)*cp); cp++) 228 continue; 229 230 if (*cp == '\0' || *cp == '#') 231 continue; 232 233 if ((name = getstring(fname, line, &cp, "name")) == NULL) 234 continue; 235 236 if ((port = getstring(fname, line, &cp, "port")) == NULL) 237 continue; 238 239 if (cp) { 240 for (aliases = cp; *cp && *cp != '#'; cp++) 241 continue; 242 243 if (*cp) 244 *cp = '\0'; 245 } else 246 aliases = NULL; 247 248 proto = strchr(port, '/'); 249 if (proto == NULL || proto[1] == '\0') { 250 warnx("%s, %zu: no protocol found", fname, line); 251 continue; 252 } 253 *proto++ = '\0'; 254 255 errno = 0; 256 pnum = strtoul(port, &ep, 0); 257 if (*port == '\0' || *ep != '\0') { 258 warnx("%s, %zu: invalid port `%s'", fname, line, port); 259 continue; 260 } 261 if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) { 262 warnx("%s, %zu: port too big `%s'", fname, line, port); 263 continue; 264 } 265 266 if (svc[pnum] == NULL) 267 svc[pnum] = ecalloc(PROTOMAX, sizeof(StringList *)); 268 269 pindex = getprotoindex(sl, proto); 270 if (svc[pnum][pindex] == NULL) 271 s = svc[pnum][pindex] = sl_init(); 272 else 273 s = svc[pnum][pindex]; 274 275 /* build list of aliases */ 276 if (sl_find(s, name) == NULL) 277 (void)sl_add(s, estrdup(name)); 278 279 if (aliases) { 280 while ((alias = strsep(&aliases, " \t")) != NULL) { 281 if (alias[0] == '\0') 282 continue; 283 if (sl_find(s, alias) == NULL) 284 (void)sl_add(s, estrdup(alias)); 285 } 286 } 287 } 288 (void)fclose(fp); 289 return svc; 290 } 291 292 /* 293 * cleanup(): Remove temporary files upon exit 294 */ 295 static void 296 cleanup(void) 297 { 298 if (tname[0]) 299 (void)unlink(tname); 300 } 301 302 static char * 303 getstring(const char *fname, size_t line, char **cp, const char *tag) 304 { 305 char *str; 306 307 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 308 continue; 309 310 if (str == NULL) 311 warnx("%s, %zu: no %s found", fname, line, tag); 312 313 return str; 314 } 315 316 static void 317 killproto(DBT *key) 318 { 319 char *p, *d = key->data; 320 321 if ((p = strchr(d, '/')) == NULL) 322 abort(); 323 *p++ = '\0'; 324 key->size = p - d; 325 } 326 327 static void 328 store(DB *db, DBT *key, DBT *data, int warndup) 329 { 330 #ifdef DEBUG 331 int k = key->size - 1; 332 int d = data->size - 1; 333 (void)printf("store [%*.*s] [%*.*s]\n", 334 k, k, (char *)key->data + 1, 335 d, d, (char *)data->data + 1); 336 #endif 337 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 338 case 0: 339 break; 340 case 1: 341 if (warndup) 342 warnx("duplicate service `%s'", 343 &((char *)key->data)[1]); 344 break; 345 case -1: 346 err(1, "put"); 347 break; 348 default: 349 abort(); 350 break; 351 } 352 } 353 354 static size_t 355 getprotoindex(StringList *sl, const char *str) 356 { 357 size_t i; 358 359 for (i= 0; i < sl->sl_cur; i++) 360 if (strcmp(sl->sl_str[i], str) == 0) 361 return i; 362 363 if (i == PROTOMAX) 364 errx(1, "Ran out of protocols adding `%s';" 365 " recompile with larger PROTOMAX", str); 366 (void)sl_add(sl, estrdup(str)); 367 return i; 368 } 369 370 static const char * 371 getprotostr(StringList *sl, size_t i) 372 { 373 assert(i < sl->sl_cur); 374 return sl->sl_str[i]; 375 } 376 377 static const char * 378 mkaliases(StringList *sl, char *buf, size_t len) 379 { 380 size_t nc, i, pos; 381 382 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 383 nc = strlcpy(buf + pos, sl->sl_str[i], len); 384 if (nc >= len) 385 goto out; 386 pos += nc; 387 len -= nc; 388 nc = strlcpy(buf + pos, " ", len); 389 if (nc >= len) 390 goto out; 391 pos += nc; 392 len -= nc; 393 } 394 return buf; 395 out: 396 warn("aliases for `%s' truncated", sl->sl_str[0]); 397 return buf; 398 } 399 400 static void 401 usage(void) 402 { 403 (void)fprintf(stderr, "Usage: %s [-q] [-o <db>] [<servicefile>]\n", 404 getprogname()); 405 exit(1); 406 } 407
Indexes created Tue Sep 30 17:09:57 GMT 2025