1 /*	$NetBSD: services_mkdb.c,v 1.18 2010/10/07 01:28:50 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  *
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 #ifndef lint
34 __RCSID("$NetBSD: services_mkdb.c,v 1.18 2010/10/07 01:28:50 christos Exp $");
35 #endif /* not lint */
36 
37 #include <sys/param.h>
38 
39 #include <assert.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 <util.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 StringList ***parseservices(const char *, StringList *);
60 static void	cleanup(void);
61 static char    *getstring(const char *, size_t, char **, const char *);
62 static size_t	getprotoindex(StringList *, const char *);
63 static const char *getprotostr(StringList *, size_t);
64 static void	usage(void) __dead;
65 
66 int
67 main(int argc, char *argv[])
68 {
69 	int	 ch;
70 	const char *fname = _PATH_SERVICES;
71 	const char *dbname = NULL;
72 	int	 use_db = 0;
73 	int	 warndup = 0;
74 	int	 unique = 0;
75 	int	 otherflag = 0;
76 	size_t	 cnt = 0;
77 	StringList *sl, ***svc;
78 	size_t port, proto;
79 	void (*addfn)(StringList *, size_t, const char *, size_t *, int);
80 	int (*closefn)(void);
81 
82 	setprogname(argv[0]);
83 
84 	while ((ch = getopt(argc, argv, "o:quV:v")) != -1)
85 		switch (ch) {
86 		case 'o':
87 			otherflag = 1;
88 			dbname = optarg;
89 			break;
90 		case 'q':
91 			otherflag = 1;
92 			warndup = 0;
93 			break;
94 		case 'u':
95 			unique++;
96 			break;
97 		case 'V':
98 			if (strcmp(optarg, "db") == 0)
99 				use_db = 1;
100 			else if (strcmp(optarg, "cdb") == 0)
101 				use_db = 0;
102 			else
103 				usage();
104 			break;
105 		case 'v':
106 			otherflag = 1;
107 			warndup = 1;
108 			break;
109 		default:
110 			usage();
111 		}
112 
113 	argc -= optind;
114 	argv += optind;
115 
116 	if (argc > 1 || (unique && otherflag))
117 		usage();
118 	if (argc == 1)
119 		fname = argv[0];
120 
121 	if (unique)
122 		uniq(fname);
123 
124 	if (dbname == NULL)
125 		dbname = use_db ? _PATH_SERVICES_DB : _PATH_SERVICES_CDB;
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 
134 	if (use_db) {
135 		if (db_open(tname))
136 			err(1, "Error opening temporary database `%s'", tname);
137 		addfn = db_add;
138 		closefn = db_close;
139 	} else {
140 		if (cdb_open(tname))
141 			err(1, "Error opening temporary database `%s'", tname);
142 		addfn = cdb_add;
143 		closefn = cdb_close;
144 	}
145 
146 	for (port = 0; port < PMASK + 1; port++) {
147 		if (svc[port] == NULL)
148 			continue;
149 
150 		for (proto = 0; proto < PROTOMAX; proto++) {
151 			StringList *s;
152 			if ((s = svc[port][proto]) == NULL)
153 				continue;
154 			(addfn)(s, port, getprotostr(sl, proto), &cnt, warndup);
155 		}
156 
157 		free(svc[port]);
158 	}
159 
160 	free(svc);
161 	sl_free(sl, 1);
162 
163 	if ((closefn)())
164 		err(1, "Error writing temporary database `%s'", tname);
165 
166 	if (rename(tname, dbname) == -1)
167 		err(1, "Cannot rename `%s' to `%s'", tname, dbname);
168 
169 	return 0;
170 }
171 
172 static StringList ***
173 parseservices(const char *fname, StringList *sl)
174 {
175 	size_t len, line, pindex;
176 	FILE *fp;
177 	StringList ***svc, *s;
178 	char *p, *ep;
179 
180 	if ((fp = fopen(fname, "r")) == NULL)
181 		err(1, "Cannot open `%s'", fname);
182 
183 	line = 0;
184 	svc = ecalloc(PMASK + 1, sizeof(StringList **));
185 
186 	/* XXX: change NULL to "\0\0#" when fparseln fixed */
187 	for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) {
188 		char	*name, *port, *proto, *aliases, *cp, *alias;
189 		unsigned long pnum;
190 
191 		if (len == 0)
192 			continue;
193 
194 		for (cp = p; *cp && isspace((unsigned char)*cp); cp++)
195 			continue;
196 
197 		if (*cp == '\0' || *cp == '#')
198 			continue;
199 
200 		if ((name = getstring(fname, line, &cp, "name")) == NULL)
201 			continue;
202 
203 		if ((port = getstring(fname, line, &cp, "port")) == NULL)
204 			continue;
205 
206 		if (cp) {
207 			for (aliases = cp; *cp && *cp != '#'; cp++)
208 				continue;
209 
210 			if (*cp)
211 				*cp = '\0';
212 		} else
213 			aliases = NULL;
214 
215 		proto = strchr(port, '/');
216 		if (proto == NULL || proto[1] == '\0') {
217 			warnx("%s, %zu: no protocol found", fname, line);
218 			continue;
219 		}
220 		*proto++ = '\0';
221 
222 		errno = 0;
223 		pnum = strtoul(port, &ep, 0);
224 		if (*port == '\0' || *ep != '\0') {
225 			warnx("%s, %zu: invalid port `%s'", fname, line, port);
226 			continue;
227 		}
228 		if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) {
229 			warnx("%s, %zu: port too big `%s'", fname, line, port);
230 			continue;
231 		}
232 
233 		if (svc[pnum] == NULL)
234 			svc[pnum] = ecalloc(PROTOMAX, sizeof(StringList *));
235 
236 		pindex = getprotoindex(sl, proto);
237 		if (svc[pnum][pindex] == NULL)
238 			s = svc[pnum][pindex] = sl_init();
239 		else
240 			s = svc[pnum][pindex];
241 
242 		if (strlen(name) > 255) {
243 			warnx("%s, %zu: invalid name too long `%s'", fname,
244 			    line, name);
245 			continue;
246 		}
247 
248 		/* build list of aliases */
249 		if (sl_find(s, name) == NULL)
250 			(void)sl_add(s, estrdup(name));
251 
252 		if (aliases) {
253 			while ((alias = strsep(&aliases, " \t")) != NULL) {
254 				if (alias[0] == '\0')
255 					continue;
256 				if (strlen(alias) > 255) {
257 					warnx("%s, %zu: alias name too long `%s'",
258 					    fname, line, alias);
259 		    			continue;
260 				}
261 				if (sl_find(s, alias) == NULL)
262 					(void)sl_add(s, estrdup(alias));
263 			}
264 		}
265 	}
266 	(void)fclose(fp);
267 	return svc;
268 }
269 
270 /*
271  * cleanup(): Remove temporary files upon exit
272  */
273 static void
274 cleanup(void)
275 {
276 	if (tname[0])
277 		(void)unlink(tname);
278 }
279 
280 static char *
281 getstring(const char *fname, size_t line, char **cp, const char *tag)
282 {
283 	char *str;
284 
285 	while ((str = strsep(cp, " \t")) != NULL && *str == '\0')
286 		continue;
287 
288 	if (str == NULL)
289 		warnx("%s, %zu: no %s found", fname, line, tag);
290 
291 	return str;
292 }
293 
294 static size_t
295 getprotoindex(StringList *sl, const char *str)
296 {
297 	size_t i;
298 
299 	for (i= 0; i < sl->sl_cur; i++)
300 		if (strcmp(sl->sl_str[i], str) == 0)
301 			return i;
302 
303 	if (i == PROTOMAX)
304 		errx(1, "Ran out of protocols adding `%s';"
305 		    " recompile with larger PROTOMAX", str);
306 	(void)sl_add(sl, estrdup(str));
307 	return i;
308 }
309 
310 static const char *
311 getprotostr(StringList *sl, size_t i)
312 {
313 	assert(i < sl->sl_cur);
314 	return sl->sl_str[i];
315 }
316 
317 static void
318 usage(void)
319 {
320 	(void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [-V cdb|db] [<servicefile>]\n"
321 	    "\t%s -u [<servicefile>]\n", getprogname(), getprogname());
322 	exit(1);
323 }
324