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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <nss.h>
#include <grp.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include <sys/param.h>
#include "nss-nis.h"
/* Get the declaration of the parser function. */
#define ENTNAME grent
#define STRUCTURE group
#define EXTERN_PARSER
#include <nss/nss_files/files-parse.c>
struct response_t
{
char *val;
struct response_t *next;
};
struct intern_t
{
struct response_t *start;
struct response_t *next;
};
typedef struct intern_t intern_t;
static int
saveit (int instatus, char *inkey, int inkeylen, char *inval,
int invallen, char *indata)
{
intern_t *intern = (intern_t *) indata;
if (instatus != YP_TRUE)
return instatus;
if (inkey && inkeylen > 0 && inval && invallen > 0)
{
if (intern->start == NULL)
{
intern->start = malloc (sizeof (struct response_t));
if (intern->start == NULL)
return YP_FALSE;
intern->next = intern->start;
}
else
{
intern->next->next = malloc (sizeof (struct response_t));
if (intern->next->next == NULL)
return YP_FALSE;
intern->next = intern->next->next;
}
intern->next->next = NULL;
intern->next->val = malloc (invallen + 1);
if (intern->next->val == NULL)
return YP_FALSE;
strncpy (intern->next->val, inval, invallen);
intern->next->val[invallen] = '\0';
}
return 0;
}
static enum nss_status
internal_setgrent (intern_t *intern)
{
char *domainname;
struct ypall_callback ypcb;
enum nss_status status;
if (yp_get_default_domain (&domainname))
return NSS_STATUS_UNAVAIL;
intern->start = NULL;
ypcb.foreach = saveit;
ypcb.data = (char *) intern;
status = yperr2nss (yp_all (domainname, "group.byname", &ypcb));
intern->next = intern->start;
return status;
}
static enum nss_status
internal_getgrent_r (struct group *grp, char *buffer, size_t buflen,
int *errnop, intern_t *intern)
{
struct parser_data *data = (void *) buffer;
int parse_res;
char *p;
if (intern->start == NULL)
internal_setgrent (intern);
/* Get the next entry until we found a correct one. */
do
{
if (intern->next == NULL)
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
p = strncpy (buffer, intern->next->val, buflen);
while (isspace (*p))
++p;
parse_res = _nss_files_parse_grent (p, grp, data, buflen, errnop);
if (parse_res == -1)
return NSS_STATUS_TRYAGAIN;
intern->next = intern->next->next;
}
while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_initgroups_dyn (const char *user, gid_t group, long int *start,
long int *size, gid_t **groupsp, long int limit,
int *errnop)
{
struct group grpbuf, *g;
size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
char *tmpbuf;
enum nss_status status;
intern_t intern = { NULL, NULL };
gid_t *groups = *groupsp;
status = internal_setgrent (&intern);
if (status != NSS_STATUS_SUCCESS)
return status;
tmpbuf = __alloca (buflen);
do
{
while ((status =
internal_getgrent_r (&grpbuf, tmpbuf, buflen, errnop,
&intern)) == NSS_STATUS_TRYAGAIN
&& *errnop == ERANGE)
{
buflen *= 2;
tmpbuf = __alloca (buflen);
}
if (status != NSS_STATUS_SUCCESS)
goto done;
g = &grpbuf;
if (g->gr_gid != group)
{
char **m;
for (m = g->gr_mem; *m != NULL; ++m)
if (strcmp (*m, user) == 0)
{
/* Matches user. Insert this group. */
if (*start == *size)
{
/* Need a bigger buffer. */
gid_t *newgroups;
long int newsize;
if (limit > 0 && *size == limit)
/* We reached the maximum. */
goto done;
if (limit <= 0)
newsize = 2 * *size;
else
newsize = MIN (limit, 2 * *size);
newgroups = realloc (groups, newsize * sizeof (*groups));
if (newgroups == NULL)
goto done;
*groupsp = groups = newgroups;
*size = newsize;
}
groups[*start] = g->gr_gid;
*start += 1;
break;
}
}
}
while (status == NSS_STATUS_SUCCESS);
done:
while (intern.start != NULL)
{
if (intern.start->val != NULL)
free (intern.start->val);
intern.next = intern.start;
intern.start = intern.start->next;
free (intern.next);
}
return NSS_STATUS_SUCCESS;
}
|
