services_mkdb.c revision 241777 
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 241777 2012-10-20 10:33:15Z ed $");
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
52#include "extern.h"
53
54static char tname[MAXPATHLEN];
55
56#define	PMASK		0xffff
57#define PROTOMAX	5
58
59extern void	uniq(const char *);
60
61static void	add(DB *, StringList *, size_t, const char *, size_t *, int);
62static StringList ***parseservices(const char *, StringList *);
63static void	cleanup(void);
64static void	store(DB *, DBT *, DBT *, int);
65static void	killproto(DBT *);
66static char    *getstring(const char *, size_t, char **, const char *);
67static size_t	getprotoindex(StringList *, const char *);
68static const char *getprotostr(StringList *, size_t);
69static const char *mkaliases(StringList *, char *, size_t);
70static void	usage(void);
71
72const HASHINFO hinfo = {
73	.bsize = 256,
74	.ffactor = 4,
75	.nelem = 32768,
76	.cachesize = 1024,
77	.hash = NULL,
78	.lorder = 0
79};
80
81
82int
83main(int argc, char *argv[])
84{
85	DB	*db;
86	int	 ch;
87	const char *fname = _PATH_SERVICES;
88	const char *dbname = _PATH_SERVICES_DB;
89	int	 warndup = 1;
90	int	 unique = 0;
91	int	 otherflag = 0;
92	size_t	 cnt = 0;
93	StringList *sl, ***svc;
94	size_t port, proto;
95
96	setprogname(argv[0]);
97
98	while ((ch = getopt(argc, argv, "qo:u")) != -1)
99		switch (ch) {
100		case 'q':
101			otherflag = 1;
102			warndup = 0;
103			break;
104		case 'o':
105			otherflag = 1;
106			dbname = optarg;
107			break;
108		case 'u':
109			unique++;
110			break;
111		case '?':
112		default:
113			usage();
114		}
115
116	argc -= optind;
117	argv += optind;
118
119	if (argc > 1 || (unique && otherflag))
120		usage();
121	if (argc == 1)
122		fname = argv[0];
123
124	if (unique)
125		uniq(fname);
126
127	svc = parseservices(fname, sl = sl_init());
128
129	if (atexit(cleanup))
130		err(1, "Cannot install exit handler");
131
132	(void)snprintf(tname, sizeof(tname), "%s.tmp", dbname);
133	db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL,
134	    (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo);
135	if (!db)
136		err(1, "Error opening temporary database `%s'", tname);
137
138
139	for (port = 0; port < PMASK + 1; port++) {
140		if (svc[port] == NULL)
141			continue;
142
143		for (proto = 0; proto < PROTOMAX; proto++) {
144			StringList *s;
145			if ((s = svc[port][proto]) == NULL)
146				continue;
147			add(db, s, port, getprotostr(sl, proto), &cnt, warndup);
148		}
149
150		free(svc[port]);
151	}
152
153	free(svc);
154	sl_free(sl, 1);
155
156	if ((db->close)(db))
157		err(1, "Error closing temporary database `%s'", tname);
158
159	if (rename(tname, dbname) == -1)
160		err(1, "Cannot rename `%s' to `%s'", tname, dbname);
161
162	return 0;
163}
164
165static void
166add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt,
167    int warndup)
168{
169	size_t i;
170	char	 keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ];
171	DBT	 data, key;
172	key.data = keyb;
173	data.data = datab;
174
175#ifdef DEBUG
176	(void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto);
177	for (i = 1; i < sl->sl_cur; i++)
178	    (void)printf("%s ", sl->sl_str[i]);
179	(void)printf("]\n");
180#endif
181
182	/* key `indirect key', data `full line' */
183	data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1;
184	key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s",
185	    sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1;
186	store(db, &data, &key, warndup);
187
188	/* key `\377port/proto', data = `indirect key' */
189	key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s",
190	    port, proto) + 1;
191	store(db, &key, &data, warndup);
192
193	/* key `\377port', data = `indirect key' */
194	killproto(&key);
195	store(db, &key, &data, warndup);
196
197	/* add references for service and all aliases */
198	for (i = 0; i < sl->sl_cur; i++) {
199		/* key `\376service/proto', data = `indirect key' */
200		key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s",
201		    sl->sl_str[i], proto) + 1;
202		store(db, &key, &data, warndup);
203
204		/* key `\376service', data = `indirect key' */
205		killproto(&key);
206		store(db, &key, &data, warndup);
207	}
208	sl_free(sl, 1);
209}
210
211static StringList ***
212parseservices(const char *fname, StringList *sl)
213{
214	size_t len, line, pindex;
215	FILE *fp;
216	StringList ***svc, *s;
217	char *p, *ep;
218
219	if ((fp = fopen(fname, "r")) == NULL)
220		err(1, "Cannot open `%s'", fname);
221
222	line = 0;
223	if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL)
224		err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1));
225
226	/* XXX: change NULL to "\0\0#" when fparseln fixed */
227	for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) {
228		char	*name, *port, *proto, *aliases, *cp, *alias;
229		unsigned long pnum;
230
231		if (len == 0)
232			continue;
233
234		for (cp = p; *cp && isspace((unsigned char)*cp); cp++)
235			continue;
236
237		if (*cp == '\0' || *cp == '#')
238			continue;
239
240		if ((name = getstring(fname, line, &cp, "name")) == NULL)
241			continue;
242
243		if ((port = getstring(fname, line, &cp, "port")) == NULL)
244			continue;
245
246		if (cp) {
247			for (aliases = cp; *cp && *cp != '#'; cp++)
248				continue;
249
250			if (*cp)
251				*cp = '\0';
252		} else
253			aliases = NULL;
254
255		proto = strchr(port, '/');
256		if (proto == NULL || proto[1] == '\0') {
257			warnx("%s, %zu: no protocol found", fname, line);
258			continue;
259		}
260		*proto++ = '\0';
261
262		errno = 0;
263		pnum = strtoul(port, &ep, 0);
264		if (*port == '\0' || *ep != '\0') {
265			warnx("%s, %zu: invalid port `%s'", fname, line, port);
266			continue;
267		}
268		if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) {
269			warnx("%s, %zu: port too big `%s'", fname, line, port);
270			continue;
271		}
272
273		if (svc[pnum] == NULL) {
274			svc[pnum] = calloc(PROTOMAX, sizeof(StringList *));
275			if (svc[pnum] == NULL)
276				err(1, "Cannot allocate %zu bytes",
277				    (size_t)PROTOMAX);
278		}
279
280		pindex = getprotoindex(sl, proto);
281		if (svc[pnum][pindex] == NULL)
282			s = svc[pnum][pindex] = sl_init();
283		else
284			s = svc[pnum][pindex];
285
286		/* build list of aliases */
287		if (sl_find(s, name) == NULL) {
288			char *p2;
289
290			if ((p2 = strdup(name)) == NULL)
291				err(1, "Cannot copy string");
292			(void)sl_add(s, p2);
293		}
294
295		if (aliases) {
296			while ((alias = strsep(&aliases, " \t")) != NULL) {
297				if (alias[0] == '\0')
298					continue;
299				if (sl_find(s, alias) == NULL) {
300					char *p2;
301
302					if ((p2 = strdup(alias)) == NULL)
303						err(1, "Cannot copy string");
304					(void)sl_add(s, p2);
305				}
306			}
307		}
308	}
309	(void)fclose(fp);
310	return svc;
311}
312
313/*
314 * cleanup(): Remove temporary files upon exit
315 */
316static void
317cleanup(void)
318{
319	if (tname[0])
320		(void)unlink(tname);
321}
322
323static char *
324getstring(const char *fname, size_t line, char **cp, const char *tag)
325{
326	char *str;
327
328	while ((str = strsep(cp, " \t")) != NULL && *str == '\0')
329		continue;
330
331	if (str == NULL)
332		warnx("%s, %zu: no %s found", fname, line, tag);
333
334	return str;
335}
336
337static void
338killproto(DBT *key)
339{
340	char *p, *d = key->data;
341
342	if ((p = strchr(d, '/')) == NULL)
343		abort();
344	*p++ = '\0';
345	key->size = p - d;
346}
347
348static void
349store(DB *db, DBT *key, DBT *data, int warndup)
350{
351#ifdef DEBUG
352	int k = key->size - 1;
353	int d = data->size - 1;
354	(void)printf("store [%*.*s] [%*.*s]\n",
355		k, k, (char *)key->data + 1,
356		d, d, (char *)data->data + 1);
357#endif
358	switch ((db->put)(db, key, data, R_NOOVERWRITE)) {
359	case 0:
360		break;
361	case 1:
362		if (warndup)
363			warnx("duplicate service `%s'",
364			    &((char *)key->data)[1]);
365		break;
366	case -1:
367		err(1, "put");
368		break;
369	default:
370		abort();
371		break;
372	}
373}
374
375static size_t
376getprotoindex(StringList *sl, const char *str)
377{
378	size_t i;
379	char *p;
380
381	for (i= 0; i < sl->sl_cur; i++)
382		if (strcmp(sl->sl_str[i], str) == 0)
383			return i;
384
385	if (i == PROTOMAX)
386		errx(1, "Ran out of protocols adding `%s';"
387		    " recompile with larger PROTOMAX", str);
388	if ((p = strdup(str)) == NULL)
389		err(1, "Cannot copy string");
390	(void)sl_add(sl, p);
391	return i;
392}
393
394static const char *
395getprotostr(StringList *sl, size_t i)
396{
397	assert(i < sl->sl_cur);
398	return sl->sl_str[i];
399}
400
401static const char *
402mkaliases(StringList *sl, char *buf, size_t len)
403{
404	size_t nc, i, pos;
405
406	buf[0] = 0;
407	for (i = 1, pos = 0; i < sl->sl_cur; i++) {
408		nc = strlcpy(buf + pos, sl->sl_str[i], len);
409		if (nc >= len)
410			goto out;
411		pos += nc;
412		len -= nc;
413		nc = strlcpy(buf + pos, " ", len);
414		if (nc >= len)
415			goto out;
416		pos += nc;
417		len -= nc;
418	}
419	return buf;
420out:
421	warn("aliases for `%s' truncated", sl->sl_str[0]);
422	return buf;
423}
424
425static void
426usage(void)
427{
428	(void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [<servicefile>]\n"
429	    "\t%s -u [<servicefile>]\n", getprogname(), getprogname());
430	exit(1);
431}
432