lib/libc/net/getprotoname.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getprotoname.c      5.5 (Berkeley) 6/27/88";
#endif /* LIBC_SCCS and not lint */

#include <netdb.h>

extern int _proto_stayopen;

struct protoent *
getprotobyname(name)
        register char *name;
{
        register struct protoent *p;
        register char **cp;

        setprotoent(_proto_stayopen);
        while (p = getprotoent()) {
                if (strcmp(p->p_name, name) == 0)
                        break;
                for (cp = p->p_aliases; *cp != 0; cp++)
                        if (strcmp(*cp, name) == 0)
                                goto found;
        }
found:
        if (!_proto_stayopen)
                endprotoent();
        return (p);
}