1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <string.h>
#include <rpcsvc/nis.h>
#include "nis_xdr.h"
#include "nis_intern.h"
nis_result *
nis_lookup (const_nis_name name, const u_long flags)
{
nis_result *res;
struct ns_request req;
nis_name *names;
nis_error status;
int count_links = 0; /* We will follow only 16 links in the deep */
int done = 0;
int name_nr = 0;
nis_name namebuf[2] = {NULL, NULL};
res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
if (flags & EXPAND_NAME)
{
names = nis_getnames (name);
if (names == NULL)
{
NIS_RES_STATUS (res) = NIS_NAMEUNREACHABLE;
return res;
}
}
else
{
names = namebuf;
names[0] = (nis_name)name;
}
req.ns_name = names[0];
while (!done)
{
req.ns_object.ns_object_len = 0;
req.ns_object.ns_object_val = NULL;
memset (res, '\0', sizeof (nis_result));
status = __do_niscall (req.ns_name, NIS_LOOKUP,
(xdrproc_t) _xdr_ns_request,
(caddr_t) & req,
(xdrproc_t) _xdr_nis_result,
(caddr_t) res, flags, NULL);
if (status != NIS_SUCCESS)
NIS_RES_STATUS (res) = status;
switch (NIS_RES_STATUS (res))
{
case NIS_PARTIAL:
case NIS_SUCCESS:
case NIS_S_SUCCESS:
if (__type_of(NIS_RES_OBJECT (res)) == NIS_LINK_OBJ &&
flags & FOLLOW_LINKS) /* We are following links */
{
/* if we hit the link limit, bail */
if (count_links > NIS_MAXLINKS)
{
NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
++done;
break;
}
if (count_links)
free (req.ns_name);
++count_links;
req.ns_name = strdup (NIS_RES_OBJECT (res)->LI_data.li_name);
nis_freeresult (res);
res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
}
else
++done;
break;
case NIS_CBRESULTS:
/* The callback is handled in __do_niscall2 */
++done;
break;
case NIS_UNAVAIL:
/* NIS+ is not installed, or all servers are down */
++done;
break;
default:
/* Try the next domainname if we don't follow a link */
if (count_links)
{
free (req.ns_name);
NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
++done;
break;
}
++name_nr;
if (names[name_nr] == NULL)
{
++done;
break;
}
req.ns_name = names[name_nr];
break;
}
}
if (names != namebuf)
nis_freenames (names);
return res;
}
|
