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[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
37 #include <sys/cdefs.h>
38 #include <sys/types.h>
39
40 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <netdb.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46
47 #define MAXALIASES 35
48
49 static FILE *protof = NULL;
50 static char line[BUFSIZ+1];
51 static struct protoent proto;
52 static char *proto_aliases[MAXALIASES];
53 int _proto_stayopen;
54
55 void
setprotoent(f)56 setprotoent(f)
57 int f;
58 {
59 if (protof == NULL)
60 protof = fopen(_PATH_PROTOCOLS, "r" );
61 else
62 rewind(protof);
63 _proto_stayopen |= f;
64 }
65
66 void
endprotoent()67 endprotoent()
68 {
69 if (protof) {
70 fclose(protof);
71 protof = NULL;
72 }
73 _proto_stayopen = 0;
74 }
75
76 struct protoent *
getprotoent()77 getprotoent()
78 {
79 char *p;
80 char *cp, **q;
81
82 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
83 return (NULL);
84 again:
85 if ((p = fgets(line, BUFSIZ, protof)) == NULL)
86 return (NULL);
87 if (*p == '#')
88 goto again;
89 cp = strpbrk(p, "#\n");
90 if (cp == NULL)
91 goto again;
92 *cp = '\0';
93 proto.p_name = p;
94 cp = strpbrk(p, " \t");
95 if (cp == NULL)
96 goto again;
97 *cp++ = '\0';
98 while (*cp == ' ' || *cp == '\t')
99 cp++;
100 p = strpbrk(cp, " \t");
101 if (p != NULL)
102 *p++ = '\0';
103 proto.p_proto = atoi(cp);
104 q = proto.p_aliases = proto_aliases;
105 if (p != NULL) {
106 cp = p;
107 while (cp && *cp) {
108 if (*cp == ' ' || *cp == '\t') {
109 cp++;
110 continue;
111 }
112 if (q < &proto_aliases[MAXALIASES - 1])
113 *q++ = cp;
114 cp = strpbrk(cp, " \t");
115 if (cp != NULL)
116 *cp++ = '\0';
117 }
118 }
119 *q = NULL;
120 return (&proto);
121 }
122