aboutsummaryrefslogtreecommitdiff
path: root/nis/nss_nisplus/nisplus-grp.c
blob: 7f799a4f3190f33b4c4ab388a83f3b46036c413c (plain)
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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
/* Copyright (C) 1997, 2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  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 <bits/libc-lock.h>
#include <rpcsvc/nis.h>

#include "nss-nisplus.h"
#include "nisplus-parser.h"

__libc_lock_define_initialized (static, lock);

static nis_result *result;
static unsigned long next_entry;
static nis_name tablename_val;
static u_long tablename_len;

static enum nss_status
_nss_create_tablename (int *errnop)
{
  if (tablename_val == NULL)
    {
      char buf [40 + strlen (nis_local_directory ())];
      char *p;

      p = __stpcpy (buf, "group.org_dir.");
      p = __stpcpy (p, nis_local_directory ());
      tablename_val = __strdup (buf);
      if (tablename_val == NULL)
	{
	  *errnop = errno;
	  return NSS_STATUS_TRYAGAIN;
	}
      tablename_len = strlen (tablename_val);
    }
  return NSS_STATUS_SUCCESS;
}

static enum nss_status
internal_setgrent (void)
{
  enum nss_status status;
  int err;

  if (result)
    nis_freeresult (result);
  result = NULL;
  next_entry = 0;

  if (tablename_val == NULL)
    if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS)
      return NSS_STATUS_UNAVAIL;

  result = nis_list (tablename_val, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
  status = niserr2nss (result->status);
  if (status != NSS_STATUS_SUCCESS)
    {
      nis_freeresult (result);
      result = NULL;
    }
  return status;
}

enum nss_status
_nss_nisplus_setgrent (int stayopen)
{
  enum nss_status status;

  __libc_lock_lock (lock);

  status = internal_setgrent ();

  __libc_lock_unlock (lock);

  return status;
}

enum nss_status
_nss_nisplus_endgrent (void)
{
  __libc_lock_lock (lock);

  if (result)
    nis_freeresult (result);
  result = NULL;

  __libc_lock_unlock (lock);

  return NSS_STATUS_SUCCESS;
}

static enum nss_status
internal_nisplus_getgrent_r (struct group *gr, char *buffer, size_t buflen,
			     int *errnop)
{
  int parse_res;

  if (result == NULL)
    {
      enum nss_status status;

      status = internal_setgrent ();
      if (result == NULL || status != NSS_STATUS_SUCCESS)
	return status;
    }

  /* Get the next entry until we found a correct one. */
  do
    {
      if (next_entry >= result->objects.objects_len)
	return NSS_STATUS_NOTFOUND;

      parse_res = _nss_nisplus_parse_grent (result, next_entry, gr,
					    buffer, buflen, errnop);
      if (parse_res == -1)
	return NSS_STATUS_TRYAGAIN;

      ++next_entry;
    }
  while (!parse_res);

  return NSS_STATUS_SUCCESS;
}

enum nss_status
_nss_nisplus_getgrent_r (struct group *result, char *buffer, size_t buflen,
			 int *errnop)
{
  int status;

  __libc_lock_lock (lock);

  status = internal_nisplus_getgrent_r (result, buffer, buflen, errnop);

  __libc_lock_unlock (lock);

  return status;
}

enum nss_status
_nss_nisplus_getgrnam_r (const char *name, struct group *gr,
			 char *buffer, size_t buflen, int *errnop)
{
  int parse_res;

  if (tablename_val == NULL)
    {
      enum nss_status status = _nss_create_tablename (errnop);

      if (status != NSS_STATUS_SUCCESS)
	return status;
    }

  if (name == NULL)
    {
      *errnop = EINVAL;
      return NSS_STATUS_NOTFOUND;
    }
  else
    {
      nis_result *result;
      char buf[strlen (name) + 24 + tablename_len];

      sprintf (buf, "[name=%s],%s", name, tablename_val);

      result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);

      if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
	{
	  enum nss_status status = niserr2nss (result->status);

	  nis_freeresult (result);
	  return status;
	}

      parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen,
					    errnop);
      nis_freeresult (result);
      if (parse_res < 1)
	{
	  if (parse_res == -1)
	    {
	      *errnop = ERANGE;
	      return NSS_STATUS_TRYAGAIN;
	    }
	  else
	    return NSS_STATUS_NOTFOUND;
	}
      return NSS_STATUS_SUCCESS;
    }
}

enum nss_status
_nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr,
			 char *buffer, size_t buflen, int *errnop)
{
  if (tablename_val == NULL)
    {
      enum nss_status status = _nss_create_tablename (errnop);

      if (status != NSS_STATUS_SUCCESS)
	return status;
    }

  {
    int parse_res;
    nis_result *result;
    char buf[36 + tablename_len];

    sprintf (buf, "[gid=%d],%s", gid, tablename_val);

    result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);

    if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
      {
	enum nss_status status = niserr2nss (result->status);

	nis_freeresult (result);
	return status;
      }

    parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen,
					  errnop);

    nis_freeresult (result);
    if (parse_res < 1)
      {
	if (parse_res == -1)
	  {
	    *errnop = ERANGE;
	    return NSS_STATUS_TRYAGAIN;
	  }
	else
	  return NSS_STATUS_NOTFOUND;
      }
    return NSS_STATUS_SUCCESS;
  }
}