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Annotation of 43BSDReno/lib/libc/net/getprotoent.c, revision 1.1.1.1

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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