1 | /* Copyright (C) 1997-2016 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <nss.h> |
20 | #include <errno.h> |
21 | #include <shadow.h> |
22 | #include <string.h> |
23 | #include <libc-lock.h> |
24 | #include <rpcsvc/nis.h> |
25 | |
26 | #include "nss-nisplus.h" |
27 | #include "nisplus-parser.h" |
28 | |
29 | __libc_lock_define_initialized (static, lock) |
30 | |
31 | static nis_result *result; |
32 | |
33 | /* Defined in nisplus-pwd.c. */ |
34 | extern nis_name pwd_tablename_val attribute_hidden; |
35 | extern size_t pwd_tablename_len attribute_hidden; |
36 | extern enum nss_status _nss_pwd_create_tablename (int *errnop); |
37 | |
38 | |
39 | enum nss_status |
40 | _nss_nisplus_setspent (int stayopen) |
41 | { |
42 | enum nss_status status = NSS_STATUS_SUCCESS; |
43 | int err; |
44 | |
45 | __libc_lock_lock (lock); |
46 | |
47 | if (result != NULL) |
48 | { |
49 | nis_freeresult (result); |
50 | result = NULL; |
51 | } |
52 | |
53 | if (pwd_tablename_val == NULL) |
54 | status = _nss_pwd_create_tablename (&err); |
55 | |
56 | __libc_lock_unlock (lock); |
57 | |
58 | return status; |
59 | } |
60 | |
61 | enum nss_status |
62 | _nss_nisplus_endspent (void) |
63 | { |
64 | __libc_lock_lock (lock); |
65 | |
66 | if (result != NULL) |
67 | { |
68 | nis_freeresult (result); |
69 | result = NULL; |
70 | } |
71 | |
72 | __libc_lock_unlock (lock); |
73 | |
74 | return NSS_STATUS_SUCCESS; |
75 | } |
76 | |
77 | static enum nss_status |
78 | internal_nisplus_getspent_r (struct spwd *sp, char *buffer, size_t buflen, |
79 | int *errnop) |
80 | { |
81 | int parse_res; |
82 | |
83 | /* Get the next entry until we found a correct one. */ |
84 | do |
85 | { |
86 | nis_result *saved_res; |
87 | |
88 | if (result == NULL) |
89 | { |
90 | saved_res = NULL; |
91 | |
92 | if (pwd_tablename_val == NULL) |
93 | { |
94 | enum nss_status status = _nss_pwd_create_tablename (errnop); |
95 | |
96 | if (status != NSS_STATUS_SUCCESS) |
97 | return status; |
98 | } |
99 | |
100 | result = nis_first_entry (pwd_tablename_val); |
101 | if (result == NULL) |
102 | { |
103 | *errnop = errno; |
104 | return NSS_STATUS_TRYAGAIN; |
105 | } |
106 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) |
107 | return niserr2nss (result->status); |
108 | } |
109 | else |
110 | { |
111 | saved_res = result; |
112 | result = nis_next_entry (pwd_tablename_val, &result->cookie); |
113 | if (result == NULL) |
114 | { |
115 | *errnop = errno; |
116 | return NSS_STATUS_TRYAGAIN; |
117 | } |
118 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) |
119 | { |
120 | nis_freeresult (saved_res); |
121 | return niserr2nss (result->status); |
122 | } |
123 | } |
124 | |
125 | parse_res = _nss_nisplus_parse_spent (result, sp, buffer, |
126 | buflen, errnop); |
127 | if (__glibc_unlikely (parse_res == -1)) |
128 | { |
129 | nis_freeresult (result); |
130 | result = saved_res; |
131 | *errnop = ERANGE; |
132 | return NSS_STATUS_TRYAGAIN; |
133 | } |
134 | |
135 | if (saved_res != NULL) |
136 | nis_freeresult (saved_res); |
137 | } |
138 | while (!parse_res); |
139 | |
140 | return NSS_STATUS_SUCCESS; |
141 | } |
142 | |
143 | enum nss_status |
144 | _nss_nisplus_getspent_r (struct spwd *result, char *buffer, size_t buflen, |
145 | int *errnop) |
146 | { |
147 | int status; |
148 | |
149 | __libc_lock_lock (lock); |
150 | |
151 | status = internal_nisplus_getspent_r (result, buffer, buflen, errnop); |
152 | |
153 | __libc_lock_unlock (lock); |
154 | |
155 | return status; |
156 | } |
157 | |
158 | enum nss_status |
159 | _nss_nisplus_getspnam_r (const char *name, struct spwd *sp, |
160 | char *buffer, size_t buflen, int *errnop) |
161 | { |
162 | int parse_res; |
163 | |
164 | if (pwd_tablename_val == NULL) |
165 | { |
166 | enum nss_status status = _nss_pwd_create_tablename (errnop); |
167 | |
168 | if (status != NSS_STATUS_SUCCESS) |
169 | return status; |
170 | } |
171 | |
172 | if (name == NULL) |
173 | { |
174 | *errnop = EINVAL; |
175 | return NSS_STATUS_NOTFOUND; |
176 | } |
177 | |
178 | nis_result *result; |
179 | char buf[strlen (name) + 9 + pwd_tablename_len]; |
180 | int olderr = errno; |
181 | |
182 | snprintf (buf, sizeof (buf), "[name=%s],%s" , name, pwd_tablename_val); |
183 | |
184 | result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM, NULL, NULL); |
185 | |
186 | if (result == NULL) |
187 | { |
188 | *errnop = ENOMEM; |
189 | return NSS_STATUS_TRYAGAIN; |
190 | } |
191 | |
192 | if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS)) |
193 | { |
194 | enum nss_status status = niserr2nss (result->status); |
195 | |
196 | __set_errno (olderr); |
197 | |
198 | nis_freeresult (result); |
199 | return status; |
200 | } |
201 | |
202 | parse_res = _nss_nisplus_parse_spent (result, sp, buffer, buflen, errnop); |
203 | nis_freeresult (result); |
204 | |
205 | if (__glibc_unlikely (parse_res < 1)) |
206 | { |
207 | if (parse_res == -1) |
208 | { |
209 | *errnop = ERANGE; |
210 | return NSS_STATUS_TRYAGAIN; |
211 | } |
212 | else |
213 | { |
214 | __set_errno (olderr); |
215 | return NSS_STATUS_NOTFOUND; |
216 | } |
217 | } |
218 | |
219 | return NSS_STATUS_SUCCESS; |
220 | } |
221 | |