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Annotation of 43BSDReno/kerberosIV/krb/get_admhst.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * $Source: /usr/src/kerberosIV/krb/RCS/get_admhst.c,v $
                      3:  * $Author: kfall $
                      4:  *
                      5:  * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
                      6:  * of Technology.
                      7:  *
                      8:  * For copying and distribution information, please see the file
                      9:  * <mit-copyright.h>.
                     10:  */
                     11: 
                     12: #ifndef lint
                     13: static char *rcsid_get_admhst_c =
                     14: "$Header: /usr/src/kerberosIV/krb/RCS/get_admhst.c,v 4.1 90/06/25 20:55:48 kfall Exp $";
                     15: #endif /* lint */
                     16: 
                     17: #include <mit-copyright.h>
                     18: #include <stdio.h>
                     19: #include <des.h>
                     20: #include <krb.h>
                     21: #include <string.h>
                     22: 
                     23: /*
                     24:  * Given a Kerberos realm, find a host on which the Kerberos database
                     25:  * administration server can be found.
                     26:  *
                     27:  * krb_get_admhst takes a pointer to be filled in, a pointer to the name
                     28:  * of the realm for which a server is desired, and an integer n, and
                     29:  * returns (in h) the nth administrative host entry from the configuration
                     30:  * file (KRB_CONF, defined in "krb.h") associated with the specified realm.
                     31:  *
                     32:  * On error, get_admhst returns KFAILURE. If all goes well, the routine
                     33:  * returns KSUCCESS.
                     34:  *
                     35:  * For the format of the KRB_CONF file, see comments describing the routine
                     36:  * krb_get_krbhst().
                     37:  *
                     38:  * This is a temporary hack to allow us to find the nearest system running
                     39:  * a Kerberos admin server.  In the long run, this functionality will be
                     40:  * provided by a nameserver.
                     41:  */
                     42: 
                     43: krb_get_admhst(h, r, n)
                     44:     char *h;
                     45:     char *r;
                     46:     int n;
                     47: {
                     48:     FILE *cnffile;
                     49:     char tr[REALM_SZ];
                     50:     char linebuf[BUFSIZ];
                     51:     char scratch[64];
                     52:     register int i;
                     53: 
                     54:     if ((cnffile = fopen(KRB_CONF,"r")) == NULL) {
                     55:             return(KFAILURE);
                     56:     }
                     57:     if (fgets(linebuf, BUFSIZ, cnffile) == NULL) {
                     58:        /* error reading */
                     59:        (void) fclose(cnffile);
                     60:        return(KFAILURE);
                     61:     }
                     62:     if (!index(linebuf, '\n')) {
                     63:        /* didn't all fit into buffer, punt */
                     64:        (void) fclose(cnffile);
                     65:        return(KFAILURE);
                     66:     }
                     67:     for (i = 0; i < n; ) {
                     68:        /* run through the file, looking for admin host */
                     69:        if (fgets(linebuf, BUFSIZ, cnffile) == NULL) {
                     70:             (void) fclose(cnffile);
                     71:             return(KFAILURE);
                     72:         }
                     73:        /* need to scan for a token after 'admin' to make sure that
                     74:           admin matched correctly */
                     75:        if (sscanf(linebuf, "%s %s admin %s", tr, h, scratch) != 3)
                     76:            continue;
                     77:         if (!strcmp(tr,r))
                     78:             i++;
                     79:     }
                     80:     (void) fclose(cnffile);
                     81:     return(KSUCCESS);
                     82: }

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