54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
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/*
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* Copyright 1988 by the Massachusetts Institute of Technology.
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* For copying and distribution information, please see the file
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* <Copyright.MIT>.
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*
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* from: get_phost.c,v 4.6 89/01/23 09:25:40 jtkohl Exp $
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* $Id: get_phost.c,v 1.2 1994/07/19 19:25:20 g89r4222 Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"$Id: get_phost.c,v 1.2 1994/07/19 19:25:20 g89r4222 Exp $";
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#endif /* lint */
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#include <stdio.h>
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#include <ctype.h>
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#include <netdb.h>
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char *index();
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/*
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* This routine takes an alias for a host name and returns the first
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* field, lower case, of its domain name. For example, if "menel" is
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* an alias for host officially named "menelaus" (in /etc/hosts), for
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* the host whose official name is "MENELAUS.MIT.EDU", the name "menelaus"
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* is returned.
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*
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* This is done for historical Athena reasons: the Kerberos name of
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* rcmd servers (rlogin, rsh, rcp) is of the form "rcmd.host@realm"
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* where "host"is the lowercase for of the host name ("menelaus").
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* This should go away: the instance should be the domain name
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* (MENELAUS.MIT.EDU). But for now we need this routine...
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*
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* A pointer to the name is returned, if found, otherwise a pointer
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* to the original "alias" argument is returned.
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*/
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char * krb_get_phost(alias)
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char *alias;
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{
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struct hostent *h;
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char *phost = alias;
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if ((h=gethostbyname(alias)) != (struct hostent *)NULL ) {
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char *p = index( h->h_name, '.' );
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if (p)
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*p = NULL;
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p = phost = h->h_name;
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do {
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if (isupper(*p)) *p=tolower(*p);
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} while (*p++);
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}
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return(phost);
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}
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