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a68b0d31 | 1 | /* Netgroup file parser in nss_db modules. |
2666d441 | 2 | Copyright (C) 1996, 1997, 1999, 2000, 2011 Free Software Foundation, Inc. |
19361cb7 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
19361cb7 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
19361cb7 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
a68b0d31 | 19 | |
2666d441 | 20 | #include <ctype.h> |
9a6450d5 | 21 | #include <dlfcn.h> |
a68b0d31 UD |
22 | #include <errno.h> |
23 | #include <fcntl.h> | |
9a6450d5 | 24 | #include <netgroup.h> |
46ec036d | 25 | #include <string.h> |
5107cf1d | 26 | #include <bits/libc-lock.h> |
a68b0d31 | 27 | #include <paths.h> |
9a6450d5 | 28 | |
a68b0d31 | 29 | #include "nsswitch.h" |
9a6450d5 | 30 | #include "nss_db.h" |
a68b0d31 | 31 | |
2666d441 UD |
32 | /* The hashing function we use. */ |
33 | #include "../intl/hash-string.h" | |
a68b0d31 UD |
34 | |
35 | ||
2666d441 | 36 | #define DBFILE _PATH_VARDB "netgroup.db" |
a68b0d31 UD |
37 | \f |
38 | /* Maintenance of the shared handle open on the database. */ | |
a68b0d31 | 39 | enum nss_status |
2666d441 | 40 | _nss_db_setnetgrent (const char *group, struct __netgrent *result) |
a68b0d31 | 41 | { |
2666d441 UD |
42 | struct nss_db_map state; |
43 | enum nss_status status = internal_setent (DBFILE, &state); | |
a68b0d31 UD |
44 | |
45 | if (status == NSS_STATUS_SUCCESS) | |
46 | { | |
2666d441 UD |
47 | const struct nss_db_header *header = state.header; |
48 | const stridx_t *hashtable | |
49 | = (const stridx_t *) ((const char *) header | |
50 | + header->dbs[0].hashoffset); | |
51 | const char *valstrtab = (const char *) header + header->valstroffset; | |
52 | uint32_t hashval = __hash_string (group); | |
53 | size_t grouplen = strlen (group); | |
54 | size_t hidx = hashval % header->dbs[0].hashsize; | |
55 | size_t hval2 = 1 + hashval % (header->dbs[0].hashsize - 2); | |
56 | ||
57 | status = NSS_STATUS_NOTFOUND; | |
58 | while (hashtable[hidx] != ~((stridx_t) 0)) | |
59 | { | |
60 | const char *valstr = valstrtab + hashtable[hidx]; | |
61 | ||
62 | if (strncmp (valstr, group, grouplen) == 0 | |
63 | && isblank (valstr[grouplen])) | |
64 | { | |
65 | const char *cp = &valstr[grouplen + 1]; | |
66 | while (isblank (*cp)) | |
67 | ++cp; | |
68 | if (*cp != '\0') | |
69 | { | |
70 | result->data = strdup (cp); | |
71 | if (result->data == NULL) | |
72 | status = NSS_STATUS_TRYAGAIN; | |
73 | else | |
74 | { | |
75 | status = NSS_STATUS_SUCCESS; | |
76 | result->cursor = result->data; | |
77 | } | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
82 | if ((hidx += hval2) >= header->dbs[0].hashsize) | |
83 | hidx -= header->dbs[0].hashsize; | |
84 | } | |
85 | ||
86 | internal_endent (&state); | |
a68b0d31 UD |
87 | } |
88 | ||
a68b0d31 UD |
89 | return status; |
90 | ||
91 | } | |
92 | ||
93 | ||
94 | enum nss_status | |
2666d441 | 95 | _nss_db_endnetgrent (struct __netgrent *result) |
a68b0d31 | 96 | { |
2666d441 UD |
97 | free (result->data); |
98 | result->data = NULL; | |
99 | result->data_size = 0; | |
100 | result->cursor = NULL; | |
a68b0d31 UD |
101 | return NSS_STATUS_SUCCESS; |
102 | } | |
103 | ||
104 | ||
105 | extern enum nss_status _nss_netgroup_parseline (char **cursor, | |
106 | struct __netgrent *result, | |
d71b808a UD |
107 | char *buffer, size_t buflen, |
108 | int *errnop); | |
a68b0d31 UD |
109 | |
110 | enum nss_status | |
d71b808a UD |
111 | _nss_db_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen, |
112 | int *errnop) | |
a68b0d31 | 113 | { |
2666d441 | 114 | enum nss_status status; |
a68b0d31 | 115 | |
2666d441 UD |
116 | status = _nss_netgroup_parseline (&result->cursor, result, buffer, buflen, |
117 | errnop); | |
a68b0d31 UD |
118 | |
119 | return status; | |
120 | } |