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services_mkdb.c revision 1.17 
      1 /*	$NetBSD: services_mkdb.c,v 1.17 2010/05/05 22:10:50 wiz 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 1.17 2010/05/05 22:10:50 wiz 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 = 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