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)
35 static 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
50 static char SERVDB[] = _PATH_SERVICES;
51 static FILE *servf = NULL;
52 static char line[BUFSIZ+1];
53 static struct servent serv;
54 static char *serv_aliases[MAXALIASES];
55 int _serv_stayopen;
56
57 void
setservent(f)58 setservent(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
68 void
endservent()69 endservent()
70 {
71 if (servf) {
72 fclose(servf);
73 servf = NULL;
74 }
75 _serv_stayopen = 0;
76 }
77
78 struct servent *
getservent()79 getservent()
80 {
81 char *p;
82 register char *cp, **q;
83
84 if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)
85 return (NULL);
86 again:
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