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Annotation of 43BSDReno/lib/libc/net/getprotoent.c, revision 1.1

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

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