1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)getservent.c	8.1 (Berkeley) 6/4/93";
36#endif /* LIBC_SCCS and not lint */
37
38#include <sys/types.h>
39#include <string.h>
40
41#include <stdlib.h>
42#include <ctype.h>
43#include <net/netdb.h>
44#include <stdio.h>
45#include <errno.h>
46#include <arpa/nameser.h>
47
48#define	MAXALIASES	35
49
50static char SERVDB[] = _PATH_SERVICES;
51static FILE *servf = NULL;
52static char line[BUFSIZ+1];
53static struct servent serv;
54static char *serv_aliases[MAXALIASES];
55int _serv_stayopen;
56
57void
58setservent(f)
59	int f;
60{
61	if (servf == NULL)
62		servf = fopen(SERVDB, "r" );
63	else
64		rewind(servf);
65	_serv_stayopen |= f;
66}
67
68void
69endservent()
70{
71	if (servf) {
72		fclose(servf);
73		servf = NULL;
74	}
75	_serv_stayopen = 0;
76}
77
78struct servent *
79getservent()
80{
81	char *p;
82	register char *cp, **q;
83
84	if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)
85		return (NULL);
86again:
87	if ((p = fgets(line, BUFSIZ, servf)) == NULL)
88		return (NULL);
89	if (*p == '#')
90		goto again;
91	cp = strpbrk(p, "#\n");
92	if (cp == NULL)
93		goto again;
94	*cp = '\0';
95	serv.s_name = p;
96	p = strpbrk(p, " \t");
97	if (p == NULL)
98		goto again;
99	*p++ = '\0';
100	while (*p == ' ' || *p == '\t')
101		p++;
102	cp = strpbrk(p, ",/");
103	if (cp == NULL)
104		goto again;
105	*cp++ = '\0';
106	serv.s_port = htons((u_short)atoi(p));
107	serv.s_proto = cp;
108	q = serv.s_aliases = serv_aliases;
109	cp = strpbrk(cp, " \t");
110	if (cp != NULL)
111		*cp++ = '\0';
112	while (cp && *cp) {
113		if (*cp == ' ' || *cp == '\t') {
114			cp++;
115			continue;
116		}
117		if (q < &serv_aliases[MAXALIASES - 1])
118			*q++ = cp;
119		cp = strpbrk(cp, " \t");
120		if (cp != NULL)
121			*cp++ = '\0';
122	}
123	*q = NULL;
124	return (&serv);
125}
126