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
main(int argc,char * argv[])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
add(DB * db,StringList * sl,size_t port,const char * proto,size_t * cnt,int warndup)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 ***
parseservices(const char * fname,StringList * sl)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
cleanup(void)347 cleanup(void)
348 {
349 if (tname[0])
350 (void)unlink(tname);
351 }
352
353 static char *
getstring(const char * fname,size_t line,char ** cp,const char * tag)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
killproto(DBT * key)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
store(DB * db,DBT * key,DBT * data,int warndup)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
getprotoindex(StringList * sl,const char * str)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 *
getprotostr(StringList * sl,size_t i)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 *
mkaliases(StringList * sl,char * buf,size_t len)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
usage(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