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3cf9afd3 C |
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 | } |