about summary refs log tree commit diff
path: root/nscd/nscd_conf.c
blob: b989f10ef85c50ed2b3b924d6976b3583c3323ea (plain) (blame)
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
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/* Copyright (c) 1998-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published
   by the Free Software Foundation; version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.  */

#include <ctype.h>
#include <errno.h>
#include <error.h>
#include <libintl.h>
#include <malloc.h>
#include <pwd.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>

#include "dbg_log.h"
#include "nscd.h"


/* Names of the databases.  */
const char *const dbnames[lastdb] =
{
  [pwddb] = "passwd",
  [grpdb] = "group",
  [hstdb] = "hosts",
  [servdb] = "services",
  [netgrdb] = "netgroup"
};


static int
find_db (const char *name)
{
  for (int cnt = 0; cnt < lastdb; ++cnt)
    if (strcmp (name, dbnames[cnt]) == 0)
      return cnt;

  error (0, 0, _("database %s is not supported"), name);
  return -1;
}

int
nscd_parse_file (const char *fname, struct database_dyn dbs[lastdb])
{
  FILE *fp;
  char *line, *cp, *entry, *arg1, *arg2;
  size_t len;
  int cnt;
  const unsigned int initial_error_message_count = error_message_count;

  /* Open the configuration file.  */
  fp = fopen (fname, "r");
  if (fp == NULL)
    return -1;

  /* The stream is not used by more than one thread.  */
  (void) __fsetlocking (fp, FSETLOCKING_BYCALLER);

  line = NULL;
  len = 0;

  do
    {
      ssize_t n = getline (&line, &len, fp);
      if (n < 0)
	break;
      if (line[n - 1] == '\n')
	line[n - 1] = '\0';

      /* Because the file format does not know any form of quoting we
	 can search forward for the next '#' character and if found
	 make it terminating the line.  */
      *strchrnul (line, '#') = '\0';

      /* If the line is blank it is ignored.  */
      if (line[0] == '\0')
	continue;

      entry = line;
      while (isspace (*entry) && *entry != '\0')
	++entry;
      cp = entry;
      while (!isspace (*cp) && *cp != '\0')
	++cp;
      arg1 = cp;
      ++arg1;
      *cp = '\0';
      if (strlen (entry) == 0)
	error (0, 0, _("Parse error: %s"), line);
      while (isspace (*arg1) && *arg1 != '\0')
	++arg1;
      cp = arg1;
      while (!isspace (*cp) && *cp != '\0')
	++cp;
      arg2 = cp;
      ++arg2;
      *cp = '\0';
      if (strlen (arg2) > 0)
	{
	  while (isspace (*arg2) && *arg2 != '\0')
	    ++arg2;
	  cp = arg2;
	  while (!isspace (*cp) && *cp != '\0')
	    ++cp;
	  *cp = '\0';
	}

      if (strcmp (entry, "positive-time-to-live") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    dbs[idx].postimeout = atol (arg2);
	}
      else if (strcmp (entry, "negative-time-to-live") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    dbs[idx].negtimeout = atol (arg2);
	}
      else if (strcmp (entry, "suggested-size") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    dbs[idx].suggested_module
	      = atol (arg2) ?: DEFAULT_SUGGESTED_MODULE;
	}
      else if (strcmp (entry, "enable-cache") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    {
	      if (strcmp (arg2, "no") == 0)
		dbs[idx].enabled = 0;
	      else if (strcmp (arg2, "yes") == 0)
		dbs[idx].enabled = 1;
	    }
	}
      else if (strcmp (entry, "check-files") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    {
	      if (strcmp (arg2, "no") == 0)
		dbs[idx].check_file = 0;
	      else if (strcmp (arg2, "yes") == 0)
		dbs[idx].check_file = 1;
	    }
	}
      else if (strcmp (entry, "max-db-size") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    dbs[idx].max_db_size = atol (arg2) ?: DEFAULT_MAX_DB_SIZE;
	}
      else if (strcmp (entry, "logfile") == 0)
	set_logfile (arg1);
      else if (strcmp (entry, "debug-level") == 0)
	{
	  int level = atoi (arg1);
	  if (level > 0)
	    debug_level = level;
	}
      else if (strcmp (entry, "threads") == 0)
	{
	  if (nthreads == -1)
	    nthreads = MAX (atol (arg1), lastdb);
	}
      else if (strcmp (entry, "max-threads") == 0)
	{
	  max_nthreads = MAX (atol (arg1), lastdb);
	}
      else if (strcmp (entry, "server-user") == 0)
	{
	  if (!arg1)
	    error (0, 0, _("Must specify user name for server-user option"));
	  else
	    {
	      free ((char *) server_user);
	      server_user = xstrdup (arg1);
	    }
	}
      else if (strcmp (entry, "stat-user") == 0)
	{
	  if (arg1 == NULL)
	    error (0, 0, _("Must specify user name for stat-user option"));
	  else
	    {
	      free ((char *) stat_user);
	      stat_user = xstrdup (arg1);

	      struct passwd *pw = getpwnam (stat_user);
	      if (pw != NULL)
		stat_uid = pw->pw_uid;
	    }
	}
      else if (strcmp (entry, "persistent") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    {
	      if (strcmp (arg2, "no") == 0)
		dbs[idx].persistent = 0;
	      else if (strcmp (arg2, "yes") == 0)
		dbs[idx].persistent = 1;
	    }
	}
      else if (strcmp (entry, "shared") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    {
	      if (strcmp (arg2, "no") == 0)
		dbs[idx].shared = 0;
	      else if (strcmp (arg2, "yes") == 0)
		dbs[idx].shared = 1;
	    }
	}
      else if (strcmp (entry, "reload-count") == 0)
	{
	  if (strcasecmp (arg1, "unlimited") == 0)
	    reload_count = UINT_MAX;
	  else
	    {
	      unsigned long int count = strtoul (arg1, NULL, 0);
	      if (count > UINT8_MAX - 1)
		reload_count = UINT_MAX;
	      else
		reload_count = count;
	    }
	}
      else if (strcmp (entry, "paranoia") == 0)
	{
	  if (strcmp (arg1, "no") == 0)
	    paranoia = 0;
	  else if (strcmp (arg1, "yes") == 0)
	    paranoia = 1;
	}
      else if (strcmp (entry, "restart-interval") == 0)
	{
	  if (arg1 != NULL)
	    restart_interval = atol (arg1);
	  else
	    error (0, 0, _("Must specify value for restart-interval option"));
	}
      else if (strcmp (entry, "auto-propagate") == 0)
	{
	  int idx = find_db (arg1);
	  if (idx >= 0)
	    {
	      if (strcmp (arg2, "no") == 0)
		dbs[idx].propagate = 0;
	      else if (strcmp (arg2, "yes") == 0)
		dbs[idx].propagate = 1;
	    }
	}
      else
	error (0, 0, _("Unknown option: %s %s %s"), entry, arg1, arg2);
    }
  while (!feof_unlocked (fp));

  if (paranoia)
    {
      restart_time = time (NULL) + restart_interval;

      /* Save the old current workding directory if we are in paranoia
	 mode.  We have to change back to it.  */
      oldcwd = get_current_dir_name ();
      if (oldcwd == NULL)
	{
	  error (0, 0, _("\
cannot get current working directory: %s; disabling paranoia mode"),
		   strerror (errno));
	  paranoia = 0;
	}
    }

  /* Enforce sanity.  */
  if (max_nthreads < nthreads)
    max_nthreads = nthreads;

  for (cnt = 0; cnt < lastdb; ++cnt)
    {
      size_t datasize = (sizeof (struct database_pers_head)
			 + roundup (dbs[cnt].suggested_module
				    * sizeof (ref_t), ALIGN)
			 + (dbs[cnt].suggested_module
			    * DEFAULT_DATASIZE_PER_BUCKET));
      if (datasize > dbs[cnt].max_db_size)
	{
	  error (0, 0, _("maximum file size for %s database too small"),
		   dbnames[cnt]);
	  dbs[cnt].max_db_size = datasize;
	}

    }

  /* Free the buffer.  */
  free (line);
  /* Close configuration file.  */
  fclose (fp);

  return error_message_count != initial_error_message_count;
}