| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /*
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| 2 | * Copyright (c) 1983, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. All advertising materials mentioning features or use of this software
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| 14 | * must display the following acknowledgement:
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| 15 | * This product includes software developed by the University of
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| 16 | * California, Berkeley and its contributors.
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| 17 | * 4. Neither the name of the University nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | */
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| 33 |
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| 34 | #if defined(LIBC_SCCS) && !defined(lint)
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| 35 | static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93";
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| 36 | #endif /* LIBC_SCCS and not lint */
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| 37 |
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| 38 | #include <sys/types.h>
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| 39 | #include <sys/socket.h>
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| 40 | #include <netdb.h>
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| 41 | #include <stdio.h>
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| 42 | #include <stdlib.h>
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| 43 | #include <string.h>
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| 44 |
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| 45 | #define MAXALIASES 35
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| 46 |
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| 47 | static FILE *protof = NULL;
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| 48 | static char line[BUFSIZ+1];
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| 49 | static struct protoent proto;
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| 50 | static char *proto_aliases[MAXALIASES];
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| 51 | int _proto_stayopen;
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| 52 |
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| 53 | void
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| 54 | setprotoent(int f)
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| 55 | {
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| 56 | if (protof == NULL)
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| 57 | protof = fopen(_PATH_PROTOCOLS, "r" );
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| 58 | else
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| 59 | rewind(protof);
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| 60 | _proto_stayopen |= f;
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| 61 | }
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| 62 |
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| 63 | void
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| 64 | endprotoent()
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| 65 | {
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| 66 | if (protof) {
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| 67 | fclose(protof);
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| 68 | protof = NULL;
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| 69 | }
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| 70 | _proto_stayopen = 0;
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| 71 | }
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| 72 |
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| 73 | struct protoent *
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| 74 | getprotoent()
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| 75 | {
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| 76 | char *p;
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| 77 | register char *cp, **q;
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| 78 |
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| 79 | if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
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| 80 | return (NULL);
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| 81 | again:
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| 82 | if ((p = fgets(line, BUFSIZ, protof)) == NULL)
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| 83 | return (NULL);
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| 84 | if (*p == '#')
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| 85 | goto again;
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| 86 | cp = strpbrk(p, "#\n");
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| 87 | if (cp == NULL)
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| 88 | goto again;
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| 89 | *cp = '\0';
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| 90 | proto.p_name = p;
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| 91 | cp = strpbrk(p, " \t");
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| 92 | if (cp == NULL)
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| 93 | goto again;
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| 94 | *cp++ = '\0';
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| 95 | while (*cp == ' ' || *cp == '\t')
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| 96 | cp++;
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| 97 | p = strpbrk(cp, " \t");
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| 98 | if (p != NULL)
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| 99 | *p++ = '\0';
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| 100 | proto.p_proto = atoi(cp);
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| 101 | q = proto.p_aliases = proto_aliases;
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| 102 | if (p != NULL) {
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| 103 | cp = p;
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| 104 | while (cp && *cp) {
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| 105 | if (*cp == ' ' || *cp == '\t') {
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| 106 | cp++;
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| 107 | continue;
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| 108 | }
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| 109 | if (q < &proto_aliases[MAXALIASES - 1])
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| 110 | *q++ = cp;
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| 111 | cp = strpbrk(cp, " \t");
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| 112 | if (cp != NULL)
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| 113 | *cp++ = '\0';
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| 114 | }
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| 115 | }
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| 116 | *q = NULL;
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| 117 | return (&proto);
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| 118 | }
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