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services_mkdb.c revision 1.15 
      1 /*	$NetBSD: services_mkdb.c,v 1.15 2010/04/25 00:54:46 joerg 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 1.15 2010/04/25 00:54:46 joerg 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	5
     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 = 1;
     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, "qo:uV:")) != -1)
     85 		switch (ch) {
     86 		case 'q':
     87 			otherflag = 1;
     88 			warndup = 0;
     89 			break;
     90 		case 'o':
     91 			otherflag = 1;
     92 			dbname = optarg;
     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 		default:
    106 			usage();
    107 		}
    108 
    109 	argc -= optind;
    110 	argv += optind;
    111 
    112 	if (argc > 1 || (unique && otherflag))
    113 		usage();
    114 	if (argc == 1)
    115 		fname = argv[0];
    116 
    117 	if (unique)
    118 		uniq(fname);
    119 
    120 	if (dbname == NULL)
    121 		dbname = use_db ? _PATH_SERVICES_DB : _PATH_SERVICES_CDB;
    122 
    123 	svc = parseservices(fname, sl = sl_init());
    124 
    125 	if (atexit(cleanup))
    126 		err(1, "Cannot install exit handler");
    127 
    128 	(void)snprintf(tname, sizeof(tname), "%s.tmp", dbname);
    129 
    130 	if (use_db) {
    131 		if (db_open(tname))
    132 			err(1, "Error opening temporary database `%s'", tname);
    133 		addfn = db_add;
    134 		closefn = db_close;
    135 	} else {
    136 		if (cdb_open(tname))
    137 			err(1, "Error opening temporary database `%s'", tname);
    138 		addfn = cdb_add;
    139 		closefn = cdb_close;
    140 	}
    141 
    142 	for (port = 0; port < PMASK + 1; port++) {
    143 		if (svc[port] == NULL)
    144 			continue;
    145 
    146 		for (proto = 0; proto < PROTOMAX; proto++) {
    147 			StringList *s;
    148 			if ((s = svc[port][proto]) == NULL)
    149 				continue;
    150 			(addfn)(s, port, getprotostr(sl, proto), &cnt, warndup);
    151 		}
    152 
    153 		free(svc[port]);
    154 	}
    155 
    156 	free(svc);
    157 	sl_free(sl, 1);
    158 
    159 	if ((closefn)())
    160 		err(1, "Error writing temporary database `%s'", tname);
    161 
    162 	if (rename(tname, dbname) == -1)
    163 		err(1, "Cannot rename `%s' to `%s'", tname, dbname);
    164 
    165 	return 0;
    166 }
    167 
    168 static StringList ***
    169 parseservices(const char *fname, StringList *sl)
    170 {
    171 	size_t len, line, pindex;
    172 	FILE *fp;
    173 	StringList ***svc, *s;
    174 	char *p, *ep;
    175 
    176 	if ((fp = fopen(fname, "r")) == NULL)
    177 		err(1, "Cannot open `%s'", fname);
    178 
    179 	line = 0;
    180 	svc = ecalloc(PMASK + 1, sizeof(StringList **));
    181 
    182 	/* XXX: change NULL to "\0\0#" when fparseln fixed */
    183 	for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) {
    184 		char	*name, *port, *proto, *aliases, *cp, *alias;
    185 		unsigned long pnum;
    186 
    187 		if (len == 0)
    188 			continue;
    189 
    190 		for (cp = p; *cp && isspace((unsigned char)*cp); cp++)
    191 			continue;
    192 
    193 		if (*cp == '\0' || *cp == '#')
    194 			continue;
    195 
    196 		if ((name = getstring(fname, line, &cp, "name")) == NULL)
    197 			continue;
    198 
    199 		if ((port = getstring(fname, line, &cp, "port")) == NULL)
    200 			continue;
    201 
    202 		if (cp) {
    203 			for (aliases = cp; *cp && *cp != '#'; cp++)
    204 				continue;
    205 
    206 			if (*cp)
    207 				*cp = '\0';
    208 		} else
    209 			aliases = NULL;
    210 
    211 		proto = strchr(port, '/');
    212 		if (proto == NULL || proto[1] == '\0') {
    213 			warnx("%s, %zu: no protocol found", fname, line);
    214 			continue;
    215 		}
    216 		*proto++ = '\0';
    217 
    218 		errno = 0;
    219 		pnum = strtoul(port, &ep, 0);
    220 		if (*port == '\0' || *ep != '\0') {
    221 			warnx("%s, %zu: invalid port `%s'", fname, line, port);
    222 			continue;
    223 		}
    224 		if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) {
    225 			warnx("%s, %zu: port too big `%s'", fname, line, port);
    226 			continue;
    227 		}
    228 
    229 		if (svc[pnum] == NULL)
    230 			svc[pnum] = ecalloc(PROTOMAX, sizeof(StringList *));
    231 
    232 		pindex = getprotoindex(sl, proto);
    233 		if (svc[pnum][pindex] == NULL)
    234 			s = svc[pnum][pindex] = sl_init();
    235 		else
    236 			s = svc[pnum][pindex];
    237 
    238 		if (strlen(name) > 255) {
    239 			warnx("%s, %zu: invalid name too long `%s'", fname,
    240 			    line, name);
    241 			continue;
    242 		}
    243 
    244 		/* build list of aliases */
    245 		if (sl_find(s, name) == NULL)
    246 			(void)sl_add(s, estrdup(name));
    247 
    248 		if (aliases) {
    249 			while ((alias = strsep(&aliases, " \t")) != NULL) {
    250 				if (alias[0] == '\0')
    251 					continue;
    252 				if (strlen(alias) > 255) {
    253 					warnx("%s, %zu: alias name too long `%s'",
    254 					    fname, line, alias);
    255 		    			continue;
    256 				}
    257 				if (sl_find(s, alias) == NULL)
    258 					(void)sl_add(s, estrdup(alias));
    259 			}
    260 		}
    261 	}
    262 	(void)fclose(fp);
    263 	return svc;
    264 }
    265 
    266 /*
    267  * cleanup(): Remove temporary files upon exit
    268  */
    269 static void
    270 cleanup(void)
    271 {
    272 	if (tname[0])
    273 		(void)unlink(tname);
    274 }
    275 
    276 static char *
    277 getstring(const char *fname, size_t line, char **cp, const char *tag)
    278 {
    279 	char *str;
    280 
    281 	while ((str = strsep(cp, " \t")) != NULL && *str == '\0')
    282 		continue;
    283 
    284 	if (str == NULL)
    285 		warnx("%s, %zu: no %s found", fname, line, tag);
    286 
    287 	return str;
    288 }
    289 
    290 static size_t
    291 getprotoindex(StringList *sl, const char *str)
    292 {
    293 	size_t i;
    294 
    295 	for (i= 0; i < sl->sl_cur; i++)
    296 		if (strcmp(sl->sl_str[i], str) == 0)
    297 			return i;
    298 
    299 	if (i == PROTOMAX)
    300 		errx(1, "Ran out of protocols adding `%s';"
    301 		    " recompile with larger PROTOMAX", str);
    302 	(void)sl_add(sl, estrdup(str));
    303 	return i;
    304 }
    305 
    306 static const char *
    307 getprotostr(StringList *sl, size_t i)
    308 {
    309 	assert(i < sl->sl_cur);
    310 	return sl->sl_str[i];
    311 }
    312 
    313 static void
    314 usage(void)
    315 {
    316 	(void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [-V cdb|db] [<servicefile>]\n"
    317 	    "\t%s -u [<servicefile>]\n", getprogname(), getprogname());
    318 	exit(1);
    319 }
    320