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Annotation of 43BSDTahoe/lib/libc/net/getservent.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[] = "@(#)getservent.c       5.6 (Berkeley) 6/27/88";
        !            20: #endif /* LIBC_SCCS and not lint */
        !            21: 
        !            22: #include <stdio.h>
        !            23: #include <sys/param.h>
        !            24: #include <sys/types.h>
        !            25: #include <sys/socket.h>
        !            26: #include <netdb.h>
        !            27: #include <ctype.h>
        !            28: 
        !            29: #define        MAXALIASES      35
        !            30: 
        !            31: static char SERVDB[] = "/etc/services";
        !            32: static FILE *servf = NULL;
        !            33: static char line[BUFSIZ+1];
        !            34: static struct servent serv;
        !            35: static char *serv_aliases[MAXALIASES];
        !            36: static char *any();
        !            37: int _serv_stayopen;
        !            38: 
        !            39: setservent(f)
        !            40:        int f;
        !            41: {
        !            42:        if (servf == NULL)
        !            43:                servf = fopen(SERVDB, "r" );
        !            44:        else
        !            45:                rewind(servf);
        !            46:        _serv_stayopen |= f;
        !            47: }
        !            48: 
        !            49: endservent()
        !            50: {
        !            51:        if (servf) {
        !            52:                fclose(servf);
        !            53:                servf = NULL;
        !            54:        }
        !            55:        _serv_stayopen = 0;
        !            56: }
        !            57: 
        !            58: struct servent *
        !            59: getservent()
        !            60: {
        !            61:        char *p;
        !            62:        register char *cp, **q;
        !            63: 
        !            64:        if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)
        !            65:                return (NULL);
        !            66: again:
        !            67:        if ((p = fgets(line, BUFSIZ, servf)) == 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:        serv.s_name = p;
        !            76:        p = any(p, " \t");
        !            77:        if (p == NULL)
        !            78:                goto again;
        !            79:        *p++ = '\0';
        !            80:        while (*p == ' ' || *p == '\t')
        !            81:                p++;
        !            82:        cp = any(p, ",/");
        !            83:        if (cp == NULL)
        !            84:                goto again;
        !            85:        *cp++ = '\0';
        !            86:        serv.s_port = htons((u_short)atoi(p));
        !            87:        serv.s_proto = cp;
        !            88:        q = serv.s_aliases = serv_aliases;
        !            89:        cp = any(cp, " \t");
        !            90:        if (cp != NULL)
        !            91:                *cp++ = '\0';
        !            92:        while (cp && *cp) {
        !            93:                if (*cp == ' ' || *cp == '\t') {
        !            94:                        cp++;
        !            95:                        continue;
        !            96:                }
        !            97:                if (q < &serv_aliases[MAXALIASES - 1])
        !            98:                        *q++ = cp;
        !            99:                cp = any(cp, " \t");
        !           100:                if (cp != NULL)
        !           101:                        *cp++ = '\0';
        !           102:        }
        !           103:        *q = NULL;
        !           104:        return (&serv);
        !           105: }
        !           106: 
        !           107: static char *
        !           108: any(cp, match)
        !           109:        register char *cp;
        !           110:        char *match;
        !           111: {
        !           112:        register char *mp, c;
        !           113: 
        !           114:        while (c = *cp) {
        !           115:                for (mp = match; *mp; mp++)
        !           116:                        if (*mp == c)
        !           117:                                return (cp);
        !           118:                cp++;
        !           119:        }
        !           120:        return ((char *)0);
        !           121: }

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