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d614a753 | 1 | /* Copyright (c) 1997-2020 Free Software Foundation, Inc. |
e61abf83 UD |
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 | |
41bdb6e2 AJ |
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. | |
e61abf83 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
e61abf83 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
e61abf83 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <string.h> | |
21 | #include <unistd.h> | |
4360eafd | 22 | #include <libintl.h> |
e61abf83 | 23 | #include <rpcsvc/nis.h> |
82f43dd2 | 24 | #include <shlib-compat.h> |
e61abf83 UD |
25 | |
26 | nis_name | |
27 | nis_local_group (void) | |
28 | { | |
29 | static char __nisgroup[NIS_MAXNAMELEN + 1]; | |
30 | ||
7440c23e UD |
31 | char *cptr; |
32 | if (__nisgroup[0] == '\0' | |
33 | && (cptr = getenv ("NIS_GROUP")) != NULL | |
34 | && strlen (cptr) < NIS_MAXNAMELEN) | |
e61abf83 | 35 | { |
7440c23e | 36 | char *cp = stpcpy (__nisgroup, cptr); |
e61abf83 | 37 | |
714a562f | 38 | if (cp[-1] != '.') |
e61abf83 UD |
39 | { |
40 | cptr = nis_local_directory (); | |
714a562f | 41 | if ((cp - __nisgroup) + strlen (cptr) + 1 < NIS_MAXNAMELEN) |
e61abf83 | 42 | { |
714a562f UD |
43 | *cp++ = '.'; |
44 | strcpy (cp, cptr); | |
e61abf83 UD |
45 | } |
46 | else | |
714a562f | 47 | __nisgroup[0] = '\0'; |
e61abf83 UD |
48 | } |
49 | } | |
50 | ||
51 | return __nisgroup; | |
52 | } | |
1e4d83f6 | 53 | libnsl_hidden_nolink_def (nis_local_group, GLIBC_2_1) |
e61abf83 UD |
54 | |
55 | nis_name | |
56 | nis_local_directory (void) | |
57 | { | |
58 | static char __nisdomainname[NIS_MAXNAMELEN + 1]; | |
e61abf83 UD |
59 | |
60 | if (__nisdomainname[0] == '\0') | |
61 | { | |
62 | if (getdomainname (__nisdomainname, NIS_MAXNAMELEN) < 0) | |
714a562f | 63 | __nisdomainname[0] = '\0'; |
e61abf83 UD |
64 | else |
65 | { | |
616d9133 | 66 | char *cp = rawmemchr (__nisdomainname, '\0'); |
e61abf83 UD |
67 | |
68 | /* Missing trailing dot? */ | |
714a562f | 69 | if (cp[-1] != '.') |
e61abf83 | 70 | { |
714a562f UD |
71 | *cp++ = '.'; |
72 | *cp = '\0'; | |
e61abf83 UD |
73 | } |
74 | } | |
75 | } | |
76 | ||
77 | return __nisdomainname; | |
78 | } | |
1e4d83f6 | 79 | libnsl_hidden_nolink_def (nis_local_directory, GLIBC_2_1) |
e61abf83 UD |
80 | |
81 | nis_name | |
82 | nis_local_principal (void) | |
83 | { | |
84 | static char __principal[NIS_MAXNAMELEN + 1]; | |
85 | ||
86 | if (__principal[0] == '\0') | |
87 | { | |
88 | char buf[NIS_MAXNAMELEN + 1]; | |
89 | nis_result *res; | |
90 | uid_t uid = geteuid (); | |
91 | ||
92 | if (uid != 0) | |
93 | { | |
714a562f UD |
94 | int len = snprintf (buf, NIS_MAXNAMELEN - 1, |
95 | "[auth_name=%d,auth_type=LOCAL],cred.org_dir.%s", | |
96 | uid, nis_local_directory ()); | |
97 | ||
98 | if (len >= NIS_MAXNAMELEN - 1) | |
7440c23e | 99 | nobody: |
714a562f UD |
100 | /* XXX The buffer is too small. Can this happen??? */ |
101 | return strcpy (__principal, "nobody"); | |
e61abf83 | 102 | |
714a562f UD |
103 | if (buf[len - 1] != '.') |
104 | { | |
105 | buf[len++] = '.'; | |
106 | buf[len] = '\0'; | |
107 | } | |
e61abf83 | 108 | |
34a5a146 JM |
109 | res = nis_list (buf, USE_DGRAM + NO_AUTHINFO + FOLLOW_LINKS |
110 | + FOLLOW_PATH, NULL, NULL); | |
e61abf83 UD |
111 | |
112 | if (res == NULL) | |
7440c23e | 113 | goto nobody; |
e61abf83 | 114 | |
91eee4dd | 115 | if (NIS_RES_STATUS (res) == NIS_SUCCESS) |
e61abf83 UD |
116 | { |
117 | if (res->objects.objects_len > 1) | |
118 | { | |
119 | /* More than one principal with same uid? something | |
714a562f | 120 | wrong with cred table. Should be unique. Warn user |
e61abf83 UD |
121 | and continue. */ |
122 | printf (_("\ | |
123 | LOCAL entry for UID %d in directory %s not unique\n"), | |
124 | uid, nis_local_directory ()); | |
125 | } | |
126 | strcpy (__principal, ENTRY_VAL (res->objects.objects_val, 0)); | |
127 | nis_freeresult (res); | |
128 | return __principal; | |
129 | } | |
130 | else | |
131 | { | |
132 | nis_freeresult (res); | |
7440c23e | 133 | goto nobody; |
e61abf83 UD |
134 | } |
135 | } | |
136 | else | |
714a562f | 137 | return strcpy (__principal, nis_local_host ()); |
e61abf83 UD |
138 | |
139 | /* Should be never reached */ | |
7440c23e | 140 | goto nobody; |
e61abf83 UD |
141 | } |
142 | return __principal; | |
143 | } | |
1e4d83f6 | 144 | libnsl_hidden_nolink_def (nis_local_principal, GLIBC_2_1) |
e61abf83 UD |
145 | |
146 | nis_name | |
147 | nis_local_host (void) | |
148 | { | |
149 | static char __nishostname[NIS_MAXNAMELEN + 1]; | |
e61abf83 UD |
150 | |
151 | if (__nishostname[0] == '\0') | |
152 | { | |
e61abf83 | 153 | if (gethostname (__nishostname, NIS_MAXNAMELEN) < 0) |
3e5f5557 UD |
154 | __nishostname[0] = '\0'; |
155 | else | |
156 | { | |
616d9133 | 157 | char *cp = rawmemchr (__nishostname, '\0'); |
714a562f | 158 | int len = cp - __nishostname; |
e61abf83 | 159 | |
3e5f5557 | 160 | /* Hostname already fully qualified? */ |
714a562f | 161 | if (cp[-1] == '.') |
3e5f5557 | 162 | return __nishostname; |
e61abf83 | 163 | |
714a562f | 164 | if (len + strlen (nis_local_directory ()) + 1 > NIS_MAXNAMELEN) |
3e5f5557 UD |
165 | { |
166 | __nishostname[0] = '\0'; | |
167 | return __nishostname; | |
168 | } | |
e61abf83 | 169 | |
3e5f5557 UD |
170 | *cp++ = '.'; |
171 | strncpy (cp, nis_local_directory (), NIS_MAXNAMELEN - len -1); | |
172 | __nishostname[NIS_MAXNAMELEN] = '\0'; | |
e61abf83 | 173 | } |
e61abf83 UD |
174 | } |
175 | ||
176 | return __nishostname; | |
177 | } | |
1e4d83f6 | 178 | libnsl_hidden_nolink_def (nis_local_host, GLIBC_2_1) |