services_mkdb.c revision 206159 
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: head/usr.sbin/services_mkdb/services_mkdb.c 206159 2010-04-04 14:23:28Z 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", 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", PROTOMAX);
275		}
276
277		pindex = getprotoindex(sl, proto);
278		if (svc[pnum][pindex] == NULL)
279			s = svc[pnum][pindex] = sl_init();
280		else
281			s = svc[pnum][pindex];
282
283		/* build list of aliases */
284		if (sl_find(s, name) == NULL) {
285			char *p2;
286
287			if ((p2 = strdup(name)) == NULL)
288				err(1, "Cannot copy string");
289			(void)sl_add(s, p2);
290		}
291
292		if (aliases) {
293			while ((alias = strsep(&aliases, " \t")) != NULL) {
294				if (alias[0] == '\0')
295					continue;
296				if (sl_find(s, alias) == NULL) {
297					char *p2;
298
299					if ((p2 = strdup(alias)) == NULL)
300						err(1, "Cannot copy string");
301					(void)sl_add(s, p2);
302				}
303			}
304		}
305	}
306	(void)fclose(fp);
307	return svc;
308}
309
310/*
311 * cleanup(): Remove temporary files upon exit
312 */
313static void
314cleanup(void)
315{
316	if (tname[0])
317		(void)unlink(tname);
318}
319
320static char *
321getstring(const char *fname, size_t line, char **cp, const char *tag)
322{
323	char *str;
324
325	while ((str = strsep(cp, " \t")) != NULL && *str == '\0')
326		continue;
327
328	if (str == NULL)
329		warnx("%s, %zu: no %s found", fname, line, tag);
330
331	return str;
332}
333
334static void
335killproto(DBT *key)
336{
337	char *p, *d = key->data;
338
339	if ((p = strchr(d, '/')) == NULL)
340		abort();
341	*p++ = '\0';
342	key->size = p - d;
343}
344
345static void
346store(DB *db, DBT *key, DBT *data, int warndup)
347{
348#ifdef DEBUG
349	int k = key->size - 1;
350	int d = data->size - 1;
351	(void)printf("store [%*.*s] [%*.*s]\n",
352		k, k, (char *)key->data + 1,
353		d, d, (char *)data->data + 1);
354#endif
355	switch ((db->put)(db, key, data, R_NOOVERWRITE)) {
356	case 0:
357		break;
358	case 1:
359		if (warndup)
360			warnx("duplicate service `%s'",
361			    &((char *)key->data)[1]);
362		break;
363	case -1:
364		err(1, "put");
365		break;
366	default:
367		abort();
368		break;
369	}
370}
371
372static size_t
373getprotoindex(StringList *sl, const char *str)
374{
375	size_t i;
376	char *p;
377
378	for (i= 0; i < sl->sl_cur; i++)
379		if (strcmp(sl->sl_str[i], str) == 0)
380			return i;
381
382	if (i == PROTOMAX)
383		errx(1, "Ran out of protocols adding `%s';"
384		    " recompile with larger PROTOMAX", str);
385	if ((p = strdup(str)) == NULL)
386		err(1, "Cannot copy string");
387	(void)sl_add(sl, p);
388	return i;
389}
390
391static const char *
392getprotostr(StringList *sl, size_t i)
393{
394	assert(i < sl->sl_cur);
395	return sl->sl_str[i];
396}
397
398static const char *
399mkaliases(StringList *sl, char *buf, size_t len)
400{
401	size_t nc, i, pos;
402
403	buf[0] = 0;
404	for (i = 1, pos = 0; i < sl->sl_cur; i++) {
405		nc = strlcpy(buf + pos, sl->sl_str[i], len);
406		if (nc >= len)
407			goto out;
408		pos += nc;
409		len -= nc;
410		nc = strlcpy(buf + pos, " ", len);
411		if (nc >= len)
412			goto out;
413		pos += nc;
414		len -= nc;
415	}
416	return buf;
417out:
418	warn("aliases for `%s' truncated", sl->sl_str[0]);
419	return buf;
420}
421
422static void
423usage(void)
424{
425	(void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [<servicefile>]\n"
426	    "\t%s -u [<servicefile>]\n", getprogname(), getprogname());
427	exit(1);
428}
429