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/*
* Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
* of Technology.
* For copying and distribution information, please see the file
* <Copyright.MIT>.
*
* from: get_krbhst.c,v 4.8 89/01/22 20:00:29 rfrench Exp $
* $FreeBSD$
*/
#if 0
#ifndef lint
static char *rcsid =
"$FreeBSD$";
#endif /* lint */
#endif
#include <stdio.h>
#include <krb.h>
#include <strings.h>
/*
* Given a Kerberos realm, find a host on which the Kerberos authenti-
* cation server can be found.
*
* krb_get_krbhst takes a pointer to be filled in, a pointer to the name
* of the realm for which a server is desired, and an integer, n, and
* returns (in h) the nth entry from the configuration file (KRB_CONF,
* defined in "krb.h") associated with the specified realm.
*
* On end-of-file, krb_get_krbhst returns KFAILURE. If n=1 and the
* configuration file does not exist, krb_get_krbhst will return KRB_HOST
* (also defined in "krb.h"). If all goes well, the routine returnes
* KSUCCESS.
*
* The KRB_CONF file contains the name of the local realm in the first
* line (not used by this routine), followed by lines indicating realm/host
* entries. The words "admin server" following the hostname indicate that
* the host provides an administrative database server.
*
* For example:
*
* ATHENA.MIT.EDU
* ATHENA.MIT.EDU kerberos-1.mit.edu admin server
* ATHENA.MIT.EDU kerberos-2.mit.edu
* LCS.MIT.EDU kerberos.lcs.mit.edu admin server
*
* This is a temporary hack to allow us to find the nearest system running
* kerberos. In the long run, this functionality will be provided by a
* nameserver.
*/
int
krb_get_krbhst(h,r,n)
char *h;
char *r;
int n;
{
FILE *cnffile;
char tr[REALM_SZ];
char linebuf[BUFSIZ];
register int i;
if ((cnffile = fopen(KRB_CONF,"r")) == NULL) {
if (n==1) {
(void) strcpy(h,KRB_HOST);
return(KSUCCESS);
}
else
return(KFAILURE);
}
if (fscanf(cnffile,"%s",tr) == EOF)
return(KFAILURE);
/* run through the file, looking for the nth server for this realm */
for (i = 1; i <= n;) {
if (fgets(linebuf, BUFSIZ, cnffile) == NULL) {
(void) fclose(cnffile);
return(KFAILURE);
}
if (sscanf(linebuf, "%s %s", tr, h) != 2)
continue;
if (!strcmp(tr,r))
i++;
}
(void) fclose(cnffile);
return(KSUCCESS);
}
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