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 <errno.h> |
20 | #include <string.h> |
21 | #include <unistd.h> |
22 | #include <libintl.h> |
23 | #include <rpcsvc/nis.h> |
24 | |
25 | nis_name |
26 | nis_local_group (void) |
27 | { |
28 | static char __nisgroup[NIS_MAXNAMELEN + 1]; |
29 | |
30 | char *cptr; |
31 | if (__nisgroup[0] == '\0' |
32 | && (cptr = getenv ("NIS_GROUP" )) != NULL |
33 | && strlen (cptr) < NIS_MAXNAMELEN) |
34 | { |
35 | char *cp = stpcpy (__nisgroup, cptr); |
36 | |
37 | if (cp[-1] != '.') |
38 | { |
39 | cptr = nis_local_directory (); |
40 | if ((cp - __nisgroup) + strlen (cptr) + 1 < NIS_MAXNAMELEN) |
41 | { |
42 | *cp++ = '.'; |
43 | strcpy (cp, cptr); |
44 | } |
45 | else |
46 | __nisgroup[0] = '\0'; |
47 | } |
48 | } |
49 | |
50 | return __nisgroup; |
51 | } |
52 | libnsl_hidden_def (nis_local_group) |
53 | |
54 | nis_name |
55 | nis_local_directory (void) |
56 | { |
57 | static char __nisdomainname[NIS_MAXNAMELEN + 1]; |
58 | |
59 | if (__nisdomainname[0] == '\0') |
60 | { |
61 | if (getdomainname (__nisdomainname, NIS_MAXNAMELEN) < 0) |
62 | __nisdomainname[0] = '\0'; |
63 | else |
64 | { |
65 | char *cp = rawmemchr (__nisdomainname, '\0'); |
66 | |
67 | /* Missing trailing dot? */ |
68 | if (cp[-1] != '.') |
69 | { |
70 | *cp++ = '.'; |
71 | *cp = '\0'; |
72 | } |
73 | } |
74 | } |
75 | |
76 | return __nisdomainname; |
77 | } |
78 | libnsl_hidden_def (nis_local_directory) |
79 | |
80 | nis_name |
81 | nis_local_principal (void) |
82 | { |
83 | static char __principal[NIS_MAXNAMELEN + 1]; |
84 | |
85 | if (__principal[0] == '\0') |
86 | { |
87 | char buf[NIS_MAXNAMELEN + 1]; |
88 | nis_result *res; |
89 | uid_t uid = geteuid (); |
90 | |
91 | if (uid != 0) |
92 | { |
93 | int len = snprintf (buf, NIS_MAXNAMELEN - 1, |
94 | "[auth_name=%d,auth_type=LOCAL],cred.org_dir.%s" , |
95 | uid, nis_local_directory ()); |
96 | |
97 | if (len >= NIS_MAXNAMELEN - 1) |
98 | nobody: |
99 | /* XXX The buffer is too small. Can this happen??? */ |
100 | return strcpy (__principal, "nobody" ); |
101 | |
102 | if (buf[len - 1] != '.') |
103 | { |
104 | buf[len++] = '.'; |
105 | buf[len] = '\0'; |
106 | } |
107 | |
108 | res = nis_list (buf, USE_DGRAM + NO_AUTHINFO + FOLLOW_LINKS + |
109 | FOLLOW_PATH, NULL, NULL); |
110 | |
111 | if (res == NULL) |
112 | goto nobody; |
113 | |
114 | if (NIS_RES_STATUS (res) == NIS_SUCCESS) |
115 | { |
116 | if (res->objects.objects_len > 1) |
117 | { |
118 | /* More than one principal with same uid? something |
119 | wrong with cred table. Should be unique. Warn user |
120 | and continue. */ |
121 | printf (_("\ |
122 | LOCAL entry for UID %d in directory %s not unique\n" ), |
123 | uid, nis_local_directory ()); |
124 | } |
125 | strcpy (__principal, ENTRY_VAL (res->objects.objects_val, 0)); |
126 | nis_freeresult (res); |
127 | return __principal; |
128 | } |
129 | else |
130 | { |
131 | nis_freeresult (res); |
132 | goto nobody; |
133 | } |
134 | } |
135 | else |
136 | return strcpy (__principal, nis_local_host ()); |
137 | |
138 | /* Should be never reached */ |
139 | goto nobody; |
140 | } |
141 | return __principal; |
142 | } |
143 | libnsl_hidden_def (nis_local_principal) |
144 | |
145 | nis_name |
146 | nis_local_host (void) |
147 | { |
148 | static char __nishostname[NIS_MAXNAMELEN + 1]; |
149 | |
150 | if (__nishostname[0] == '\0') |
151 | { |
152 | if (gethostname (__nishostname, NIS_MAXNAMELEN) < 0) |
153 | __nishostname[0] = '\0'; |
154 | else |
155 | { |
156 | char *cp = rawmemchr (__nishostname, '\0'); |
157 | int len = cp - __nishostname; |
158 | |
159 | /* Hostname already fully qualified? */ |
160 | if (cp[-1] == '.') |
161 | return __nishostname; |
162 | |
163 | if (len + strlen (nis_local_directory ()) + 1 > NIS_MAXNAMELEN) |
164 | { |
165 | __nishostname[0] = '\0'; |
166 | return __nishostname; |
167 | } |
168 | |
169 | *cp++ = '.'; |
170 | strncpy (cp, nis_local_directory (), NIS_MAXNAMELEN - len -1); |
171 | __nishostname[NIS_MAXNAMELEN] = '\0'; |
172 | } |
173 | } |
174 | |
175 | return __nishostname; |
176 | } |
177 | libnsl_hidden_def (nis_local_host) |
178 | |