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Annotation of 43BSDTahoe/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 the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #if defined(LIBC_SCCS) && !defined(lint)
        !            19: static char sccsid[] = "@(#)getprotoent.c      5.5 (Berkeley) 6/27/88";
        !            20: #endif /* LIBC_SCCS and not lint */
        !            21: 
        !            22: #include <stdio.h>
        !            23: #include <sys/types.h>
        !            24: #include <sys/socket.h>
        !            25: #include <netdb.h>
        !            26: #include <ctype.h>
        !            27: 
        !            28: #define        MAXALIASES      35
        !            29: 
        !            30: static char PROTODB[] = "/etc/protocols";
        !            31: static FILE *protof = NULL;
        !            32: static char line[BUFSIZ+1];
        !            33: static struct protoent proto;
        !            34: static char *proto_aliases[MAXALIASES];
        !            35: static char *any();
        !            36: int _proto_stayopen;
        !            37: 
        !            38: setprotoent(f)
        !            39:        int f;
        !            40: {
        !            41:        if (protof == NULL)
        !            42:                protof = fopen(PROTODB, "r" );
        !            43:        else
        !            44:                rewind(protof);
        !            45:        _proto_stayopen |= f;
        !            46: }
        !            47: 
        !            48: endprotoent()
        !            49: {
        !            50:        if (protof) {
        !            51:                fclose(protof);
        !            52:                protof = NULL;
        !            53:        }
        !            54:        _proto_stayopen = 0;
        !            55: }
        !            56: 
        !            57: struct protoent *
        !            58: getprotoent()
        !            59: {
        !            60:        char *p;
        !            61:        register char *cp, **q;
        !            62: 
        !            63:        if (protof == NULL && (protof = fopen(PROTODB, "r" )) == NULL)
        !            64:                return (NULL);
        !            65: again:
        !            66:        if ((p = fgets(line, BUFSIZ, protof)) == NULL)
        !            67:                return (NULL);
        !            68:        if (*p == '#')
        !            69:                goto again;
        !            70:        cp = any(p, "#\n");
        !            71:        if (cp == NULL)
        !            72:                goto again;
        !            73:        *cp = '\0';
        !            74:        proto.p_name = p;
        !            75:        cp = any(p, " \t");
        !            76:        if (cp == NULL)
        !            77:                goto again;
        !            78:        *cp++ = '\0';
        !            79:        while (*cp == ' ' || *cp == '\t')
        !            80:                cp++;
        !            81:        p = any(cp, " \t");
        !            82:        if (p != NULL)
        !            83:                *p++ = '\0';
        !            84:        proto.p_proto = atoi(cp);
        !            85:        q = proto.p_aliases = proto_aliases;
        !            86:        if (p != NULL) {
        !            87:                cp = p;
        !            88:                while (cp && *cp) {
        !            89:                        if (*cp == ' ' || *cp == '\t') {
        !            90:                                cp++;
        !            91:                                continue;
        !            92:                        }
        !            93:                        if (q < &proto_aliases[MAXALIASES - 1])
        !            94:                                *q++ = cp;
        !            95:                        cp = any(cp, " \t");
        !            96:                        if (cp != NULL)
        !            97:                                *cp++ = '\0';
        !            98:                }
        !            99:        }
        !           100:        *q = NULL;
        !           101:        return (&proto);
        !           102: }
        !           103: 
        !           104: static char *
        !           105: any(cp, match)
        !           106:        register char *cp;
        !           107:        char *match;
        !           108: {
        !           109:        register char *mp, c;
        !           110: 
        !           111:        while (c = *cp) {
        !           112:                for (mp = match; *mp; mp++)
        !           113:                        if (*mp == c)
        !           114:                                return (cp);
        !           115:                cp++;
        !           116:        }
        !           117:        return ((char *)0);
        !           118: }

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