update from Donn -- fixes for pcc

[unix-history] / usr / src / lib / libc / net / getprotoent.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getprotoent.c       5.8 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAXALIASES      35

static FILE *protof = NULL;
static char line[BUFSIZ+1];
static struct protoent proto;
static char *proto_aliases[MAXALIASES];
int _proto_stayopen;

void
setprotoent(f)
       int f;
{
       if (protof == NULL)
               protof = fopen(_PATH_PROTOCOLS, "r" );
       else
               rewind(protof);
       _proto_stayopen |= f;
}

void
endprotoent()
{
       if (protof) {
               fclose(protof);
               protof = NULL;
       }
       _proto_stayopen = 0;
}

struct protoent *
getprotoent()
{
       char *p;
       register char *cp, **q;

       if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
               return (NULL);
again:
       if ((p = fgets(line, BUFSIZ, protof)) == NULL)
               return (NULL);
       if (*p == '#')
               goto again;
       cp = strpbrk(p, "#\n");
       if (cp == NULL)
               goto again;
       *cp = '\0';
       proto.p_name = p;
       cp = strpbrk(p, " \t");
       if (cp == NULL)
               goto again;
       *cp++ = '\0';
       while (*cp == ' ' || *cp == '\t')
               cp++;
       p = strpbrk(cp, " \t");
       if (p != NULL)
               *p++ = '\0';
       proto.p_proto = atoi(cp);
       q = proto.p_aliases = proto_aliases;
       if (p != NULL) {
               cp = p;
               while (cp && *cp) {
                       if (*cp == ' ' || *cp == '\t') {
                               cp++;
                               continue;
                       }
                       if (q < &proto_aliases[MAXALIASES - 1])
                               *q++ = cp;
                       cp = strpbrk(cp, " \t");
                       if (cp != NULL)
                               *cp++ = '\0';
               }
       }
       *q = NULL;
       return (&proto);
}