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Annotation of 43BSDReno/lib/libc/net/getnetent.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[] = "@(#)getnetent.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 *netf = NULL;
        !            33: static char line[BUFSIZ+1];
        !            34: static struct netent net;
        !            35: static char *net_aliases[MAXALIASES];
        !            36: int _net_stayopen;
        !            37: static char *any();
        !            38: 
        !            39: setnetent(f)
        !            40:        int f;
        !            41: {
        !            42:        if (netf == NULL)
        !            43:                netf = fopen(_PATH_NETWORKS, "r" );
        !            44:        else
        !            45:                rewind(netf);
        !            46:        _net_stayopen |= f;
        !            47: }
        !            48: 
        !            49: endnetent()
        !            50: {
        !            51:        if (netf) {
        !            52:                fclose(netf);
        !            53:                netf = NULL;
        !            54:        }
        !            55:        _net_stayopen = 0;
        !            56: }
        !            57: 
        !            58: struct netent *
        !            59: getnetent()
        !            60: {
        !            61:        char *p;
        !            62:        register char *cp, **q;
        !            63: 
        !            64:        if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
        !            65:                return (NULL);
        !            66: again:
        !            67:        p = fgets(line, BUFSIZ, netf);
        !            68:        if (p == NULL)
        !            69:                return (NULL);
        !            70:        if (*p == '#')
        !            71:                goto again;
        !            72:        cp = any(p, "#\n");
        !            73:        if (cp == NULL)
        !            74:                goto again;
        !            75:        *cp = '\0';
        !            76:        net.n_name = p;
        !            77:        cp = any(p, " \t");
        !            78:        if (cp == NULL)
        !            79:                goto again;
        !            80:        *cp++ = '\0';
        !            81:        while (*cp == ' ' || *cp == '\t')
        !            82:                cp++;
        !            83:        p = any(cp, " \t");
        !            84:        if (p != NULL)
        !            85:                *p++ = '\0';
        !            86:        net.n_net = inet_network(cp);
        !            87:        net.n_addrtype = AF_INET;
        !            88:        q = net.n_aliases = net_aliases;
        !            89:        if (p != NULL) 
        !            90:                cp = p;
        !            91:        while (cp && *cp) {
        !            92:                if (*cp == ' ' || *cp == '\t') {
        !            93:                        cp++;
        !            94:                        continue;
        !            95:                }
        !            96:                if (q < &net_aliases[MAXALIASES - 1])
        !            97:                        *q++ = cp;
        !            98:                cp = any(cp, " \t");
        !            99:                if (cp != NULL)
        !           100:                        *cp++ = '\0';
        !           101:        }
        !           102:        *q = NULL;
        !           103:        return (&net);
        !           104: }
        !           105: 
        !           106: static char *
        !           107: any(cp, match)
        !           108:        register char *cp;
        !           109:        char *match;
        !           110: {
        !           111:        register char *mp, c;
        !           112: 
        !           113:        while (c = *cp) {
        !           114:                for (mp = match; *mp; mp++)
        !           115:                        if (*mp == c)
        !           116:                                return (cp);
        !           117:                cp++;
        !           118:        }
        !           119:        return ((char *)0);
        !           120: }

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