services_mkdb.c revision 225736
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__FBSDID("$FreeBSD: stable/9/usr.sbin/services_mkdb/services_mkdb.c 206163 2010-04-04 15:21:09Z ume $"); 34 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 <libutil.h> 48#include <ctype.h> 49#include <errno.h> 50#include <stringlist.h> 51 52static char tname[MAXPATHLEN]; 53 54#define PMASK 0xffff 55#define PROTOMAX 5 56 57extern void uniq(const char *); 58 59static void add(DB *, StringList *, size_t, const char *, size_t *, int); 60static StringList ***parseservices(const char *, StringList *); 61static void cleanup(void); 62static void store(DB *, DBT *, DBT *, int); 63static void killproto(DBT *); 64static char *getstring(const char *, size_t, char **, const char *); 65static size_t getprotoindex(StringList *, const char *); 66static const char *getprotostr(StringList *, size_t); 67static const char *mkaliases(StringList *, char *, size_t); 68static void usage(void); 69 70const HASHINFO hinfo = { 71 .bsize = 256, 72 .ffactor = 4, 73 .nelem = 32768, 74 .cachesize = 1024, 75 .hash = NULL, 76 .lorder = 0 77}; 78 79 80int 81main(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 size_t cnt = 0; 91 StringList *sl, ***svc; 92 size_t port, proto; 93 94 setprogname(argv[0]); 95 96 while ((ch = getopt(argc, argv, "qo:u")) != -1) 97 switch (ch) { 98 case 'q': 99 otherflag = 1; 100 warndup = 0; 101 break; 102 case 'o': 103 otherflag = 1; 104 dbname = optarg; 105 break; 106 case 'u': 107 unique++; 108 break; 109 case '?': 110 default: 111 usage(); 112 } 113 114 argc -= optind; 115 argv += optind; 116 117 if (argc > 1 || (unique && otherflag)) 118 usage(); 119 if (argc == 1) 120 fname = argv[0]; 121 122 if (unique) 123 uniq(fname); 124 125 svc = parseservices(fname, sl = sl_init()); 126 127 if (atexit(cleanup)) 128 err(1, "Cannot install exit handler"); 129 130 (void)snprintf(tname, sizeof(tname), "%s.tmp", dbname); 131 db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL, 132 (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo); 133 if (!db) 134 err(1, "Error opening temporary database `%s'", tname); 135 136 137 for (port = 0; port < PMASK + 1; port++) { 138 if (svc[port] == NULL) 139 continue; 140 141 for (proto = 0; proto < PROTOMAX; proto++) { 142 StringList *s; 143 if ((s = svc[port][proto]) == NULL) 144 continue; 145 add(db, s, port, getprotostr(sl, proto), &cnt, warndup); 146 } 147 148 free(svc[port]); 149 } 150 151 free(svc); 152 sl_free(sl, 1); 153 154 if ((db->close)(db)) 155 err(1, "Error closing temporary database `%s'", tname); 156 157 if (rename(tname, dbname) == -1) 158 err(1, "Cannot rename `%s' to `%s'", tname, dbname); 159 160 return 0; 161} 162 163static void 164add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt, 165 int warndup) 166{ 167 size_t i; 168 char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ]; 169 DBT data, key; 170 key.data = keyb; 171 data.data = datab; 172 173#ifdef DEBUG 174 (void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto); 175 for (i = 1; i < sl->sl_cur; i++) 176 (void)printf("%s ", sl->sl_str[i]); 177 (void)printf("]\n"); 178#endif 179 180 /* key `indirect key', data `full line' */ 181 data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1; 182 key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s", 183 sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1; 184 store(db, &data, &key, warndup); 185 186 /* key `\377port/proto', data = `indirect key' */ 187 key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s", 188 port, proto) + 1; 189 store(db, &key, &data, warndup); 190 191 /* key `\377port', data = `indirect key' */ 192 killproto(&key); 193 store(db, &key, &data, warndup); 194 195 /* add references for service and all aliases */ 196 for (i = 0; i < sl->sl_cur; i++) { 197 /* key `\376service/proto', data = `indirect key' */ 198 key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s", 199 sl->sl_str[i], proto) + 1; 200 store(db, &key, &data, warndup); 201 202 /* key `\376service', data = `indirect key' */ 203 killproto(&key); 204 store(db, &key, &data, warndup); 205 } 206 sl_free(sl, 1); 207} 208 209static StringList *** 210parseservices(const char *fname, StringList *sl) 211{ 212 size_t len, line, pindex; 213 FILE *fp; 214 StringList ***svc, *s; 215 char *p, *ep; 216 217 if ((fp = fopen(fname, "r")) == NULL) 218 err(1, "Cannot open `%s'", fname); 219 220 line = 0; 221 if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL) 222 err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1)); 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] = calloc(PROTOMAX, sizeof(StringList *)); 273 if (svc[pnum] == NULL) 274 err(1, "Cannot allocate %zu bytes", 275 (size_t)PROTOMAX); 276 } 277 278 pindex = getprotoindex(sl, proto); 279 if (svc[pnum][pindex] == NULL) 280 s = svc[pnum][pindex] = sl_init(); 281 else 282 s = svc[pnum][pindex]; 283 284 /* build list of aliases */ 285 if (sl_find(s, name) == NULL) { 286 char *p2; 287 288 if ((p2 = strdup(name)) == NULL) 289 err(1, "Cannot copy string"); 290 (void)sl_add(s, p2); 291 } 292 293 if (aliases) { 294 while ((alias = strsep(&aliases, " \t")) != NULL) { 295 if (alias[0] == '\0') 296 continue; 297 if (sl_find(s, alias) == NULL) { 298 char *p2; 299 300 if ((p2 = strdup(alias)) == NULL) 301 err(1, "Cannot copy string"); 302 (void)sl_add(s, p2); 303 } 304 } 305 } 306 } 307 (void)fclose(fp); 308 return svc; 309} 310 311/* 312 * cleanup(): Remove temporary files upon exit 313 */ 314static void 315cleanup(void) 316{ 317 if (tname[0]) 318 (void)unlink(tname); 319} 320 321static char * 322getstring(const char *fname, size_t line, char **cp, const char *tag) 323{ 324 char *str; 325 326 while ((str = strsep(cp, " \t")) != NULL && *str == '\0') 327 continue; 328 329 if (str == NULL) 330 warnx("%s, %zu: no %s found", fname, line, tag); 331 332 return str; 333} 334 335static void 336killproto(DBT *key) 337{ 338 char *p, *d = key->data; 339 340 if ((p = strchr(d, '/')) == NULL) 341 abort(); 342 *p++ = '\0'; 343 key->size = p - d; 344} 345 346static void 347store(DB *db, DBT *key, DBT *data, int warndup) 348{ 349#ifdef DEBUG 350 int k = key->size - 1; 351 int d = data->size - 1; 352 (void)printf("store [%*.*s] [%*.*s]\n", 353 k, k, (char *)key->data + 1, 354 d, d, (char *)data->data + 1); 355#endif 356 switch ((db->put)(db, key, data, R_NOOVERWRITE)) { 357 case 0: 358 break; 359 case 1: 360 if (warndup) 361 warnx("duplicate service `%s'", 362 &((char *)key->data)[1]); 363 break; 364 case -1: 365 err(1, "put"); 366 break; 367 default: 368 abort(); 369 break; 370 } 371} 372 373static size_t 374getprotoindex(StringList *sl, const char *str) 375{ 376 size_t i; 377 char *p; 378 379 for (i= 0; i < sl->sl_cur; i++) 380 if (strcmp(sl->sl_str[i], str) == 0) 381 return i; 382 383 if (i == PROTOMAX) 384 errx(1, "Ran out of protocols adding `%s';" 385 " recompile with larger PROTOMAX", str); 386 if ((p = strdup(str)) == NULL) 387 err(1, "Cannot copy string"); 388 (void)sl_add(sl, p); 389 return i; 390} 391 392static const char * 393getprotostr(StringList *sl, size_t i) 394{ 395 assert(i < sl->sl_cur); 396 return sl->sl_str[i]; 397} 398 399static const char * 400mkaliases(StringList *sl, char *buf, size_t len) 401{ 402 size_t nc, i, pos; 403 404 buf[0] = 0; 405 for (i = 1, pos = 0; i < sl->sl_cur; i++) { 406 nc = strlcpy(buf + pos, sl->sl_str[i], len); 407 if (nc >= len) 408 goto out; 409 pos += nc; 410 len -= nc; 411 nc = strlcpy(buf + pos, " ", len); 412 if (nc >= len) 413 goto out; 414 pos += nc; 415 len -= nc; 416 } 417 return buf; 418out: 419 warn("aliases for `%s' truncated", sl->sl_str[0]); 420 return buf; 421} 422 423static void 424usage(void) 425{ 426 (void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [<servicefile>]\n" 427 "\t%s -u [<servicefile>]\n", getprogname(), getprogname()); 428 exit(1); 429} 430