| 1 | /*
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| 2 | * Copyright (c) 1983 Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms are permitted
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| 6 | * provided that: (1) source distributions retain this entire copyright
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| 7 | * notice and comment, and (2) distributions including binaries display
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| 8 | * the following acknowledgement: ``This product includes software
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| 9 | * developed by the University of California, Berkeley and its contributors''
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| 10 | * in the documentation or other materials provided with the distribution
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| 11 | * and in all advertising materials mentioning features or use of this
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| 12 | * software. Neither the name of the University nor the names of its
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| 13 | * contributors may be used to endorse or promote products derived
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| 14 | * from this software without specific prior written permission.
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 18 | */
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| 19 |
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| 20 | #if defined(LIBC_SCCS) && !defined(lint)
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| 21 | static char sccsid[] = "@(#)getprotoent.c 5.7 (Berkeley) 6/1/90";
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| 22 | #endif /* LIBC_SCCS and not lint */
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| 23 |
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| 24 | #include <ctype.h>
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| 25 | #include <stdio.h>
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| 26 | #include <stdlib.h>
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| 27 |
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| 28 | #ifdef _MINIX
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| 29 | #include <net/gen/netdb.h>
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| 30 |
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| 31 | static char *any _ARGS(( char *cp, char *match ));
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| 32 | #endif
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| 33 |
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| 34 | #define MAXALIASES 35
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| 35 |
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| 36 | static FILE *protof = NULL;
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| 37 | static char line[BUFSIZ+1];
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| 38 | static struct protoent proto;
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| 39 | static char *proto_aliases[MAXALIASES];
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| 40 | int _proto_stayopen;
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| 41 |
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| 42 | void
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| 43 | setprotoent(f)
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| 44 | int f;
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| 45 | {
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| 46 | if (protof == NULL)
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| 47 | protof = fopen(_PATH_PROTOCOLS, "r" );
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| 48 | else
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| 49 | rewind(protof);
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| 50 | _proto_stayopen |= f;
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| 51 | }
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| 52 |
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| 53 | void
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| 54 | endprotoent()
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| 55 | {
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| 56 | if (protof) {
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| 57 | fclose(protof);
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| 58 | protof = NULL;
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| 59 | }
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| 60 | _proto_stayopen = 0;
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| 61 | }
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| 62 |
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| 63 | struct protoent *
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| 64 | getprotoent()
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| 65 | {
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| 66 | char *p;
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| 67 | register char *cp, **q;
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| 68 |
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| 69 | if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
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| 70 | return (NULL);
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| 71 | again:
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| 72 | if ((p = fgets(line, BUFSIZ, protof)) == NULL)
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| 73 | return (NULL);
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| 74 | if (*p == '#')
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| 75 | goto again;
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| 76 | cp = any(p, "#\n");
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| 77 | if (cp == NULL)
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| 78 | goto again;
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| 79 | *cp = '\0';
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| 80 | proto.p_name = p;
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| 81 | cp = any(p, " \t");
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| 82 | if (cp == NULL)
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| 83 | goto again;
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| 84 | *cp++ = '\0';
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| 85 | while (*cp == ' ' || *cp == '\t')
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| 86 | cp++;
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| 87 | p = any(cp, " \t");
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| 88 | if (p != NULL)
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| 89 | *p++ = '\0';
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| 90 | proto.p_proto = atoi(cp);
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| 91 | q = proto.p_aliases = proto_aliases;
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| 92 | if (p != NULL) {
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| 93 | cp = p;
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| 94 | while (cp && *cp) {
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| 95 | if (*cp == ' ' || *cp == '\t') {
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| 96 | cp++;
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| 97 | continue;
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| 98 | }
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| 99 | if (q < &proto_aliases[MAXALIASES - 1])
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| 100 | *q++ = cp;
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| 101 | cp = any(cp, " \t");
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| 102 | if (cp != NULL)
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| 103 | *cp++ = '\0';
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| 104 | }
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| 105 | }
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| 106 | *q = NULL;
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| 107 | return (&proto);
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| 108 | }
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| 109 |
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| 110 | static char *
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| 111 | any(cp, match)
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| 112 | register char *cp;
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| 113 | char *match;
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| 114 | {
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| 115 | register char *mp, c;
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| 116 |
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| 117 | while (c = *cp) {
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| 118 | for (mp = match; *mp; mp++)
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| 119 | if (*mp == c)
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| 120 | return (cp);
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| 121 | cp++;
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| 122 | }
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| 123 | return ((char *)0);
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| 124 | }
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