aboutsummaryrefslogtreecommitdiff
path: root/src/pgsql.c
blob: dc340d058c4b0b693b32559a3b81b136b75c3cc8 (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
/*
   pgsql.c

   This file is part of GNU Anubis.
   Copyright (C) 2004-2024 The Anubis Team.

   GNU Anubis 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; either version 3 of the License, or (at your
   option) any later version.

   GNU Anubis 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 GNU Anubis.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "headers.h"
#include "extern.h"

#ifdef WITH_PGSQL

#include "sql.h"
#include <postgresql/libpq-fe.h>

/* PostgreSQL URL:

   pgsql://user:password@host/dbname;
          table=STRING;authid=STRING;passwd=STRING[;account=STRING]
	  [;rcfile=STRING][;port=NUMBER][;socket=STRING][;bufsize=NUMBER]

   or

   postgres://...
*/

struct pgsql_db_data
{
  PGconn *conn;
  PGresult *res;
  size_t nfields;
  size_t ntuples;
  size_t curtuple;
};

static int
pg_sql_release_result (struct anubis_sql_db *amp)
{
  struct pgsql_db_data *pdata = amp->data;

  if (pdata->res)
    {
      PQclear (pdata->res);
      pdata->res = NULL;
      pdata->ntuples = pdata->nfields = 0;
    }
  return 0;
}

static int
pg_sql_query (struct anubis_sql_db *amp)
{
  struct pgsql_db_data *pdata = amp->data;
  ExecStatusType stat;

  pg_sql_release_result (amp);

  pdata->res = PQexec (pdata->conn, amp->buf);
  stat = PQresultStatus (pdata->res);
  switch (stat)
    {
    case PGRES_COMMAND_OK:
      return 0;

    case PGRES_TUPLES_OK:
      pdata->ntuples = PQntuples (pdata->res);
      pdata->nfields = PQnfields (pdata->res);
      return 0;

    default:
      pg_sql_release_result (amp);
    }

  return 1;
}

static size_t
pg_sql_num_tuples (struct anubis_sql_db *amp)
{
  struct pgsql_db_data *pdata = amp->data;

  if (!pdata->res)
    return 0;
  return pdata->ntuples;
}

static size_t
pg_sql_num_columns (struct anubis_sql_db *amp)
{
  struct pgsql_db_data *pdata = amp->data;

  if (!pdata->res)
    return 0;
  return pdata->nfields;
}

static int
pg_sql_get_tuple (struct anubis_sql_db *amp, size_t i)
{
  struct pgsql_db_data *pdata = amp->data;

  if (!pdata->res || i >= pdata->ntuples)
    return 1;
  pdata->curtuple = i;
  return 0;
}

static const char *
pg_sql_get_column (struct anubis_sql_db *amp, size_t i)
{
  struct pgsql_db_data *pdata = amp->data;
  char *p;

  if (!pdata->res || i >= pdata->nfields)
    return NULL;
  p = PQgetvalue (pdata->res, pdata->curtuple, i);
  if (p)
    {
      char *endp;
      for (endp = p + strlen (p); endp > p && isspace (endp[-1]); endp--)
	;
      *endp = 0;
    }
  return p;
}

/* Open the plaintext database. ARG is the full pathname to the file */
static int
pgsql_db_open (void **dp, ANUBIS_URL * url, enum anubis_db_mode mode,
	       char const **errp)
{
  struct anubis_sql_db *amp = NULL;
  const char *table = anubis_url_get_arg (url, "table");
  const char *authid = anubis_url_get_arg (url, "authid");
  const char *passwd = anubis_url_get_arg (url, "passwd");
  const char *user = anubis_url_get_arg (url, "account");
  const char *rcfile = anubis_url_get_arg (url, "rcfile");
  const char *portstr = anubis_url_get_arg (url, "port");
  const char *s = anubis_url_get_arg (url, "bufsize");
  size_t bufsize = 1024;
  struct pgsql_db_data *pdata;
  PGconn *conn;

  /* Provide reasonable defaults */
  if (!table)
    table = "users";
  if (!authid)
    authid = "authid";
  if (!passwd)
    passwd = "passwd";
  if (!user)
    user = "account";
  if (!rcfile)
    rcfile = "rcfile";

  conn = PQsetdbLogin (url->host, portstr, NULL, NULL,
		       url->path, url->user, url->passwd);

  if (PQstatus (conn) == CONNECTION_BAD)
    {
      /* PQerrorMessage(conn) */
      PQfinish (conn);
      free (amp);
      *errp = sql_open_error_text (ERR_CANTCONNECT);
      return ANUBIS_DB_FAIL;
    }

  amp = xzalloc (sizeof (*amp));
  amp->buf = xmalloc (bufsize);
  amp->bufsize = bufsize;
  pdata = xmalloc (sizeof (*pdata));
  pdata->conn = conn;
  amp->data = pdata;

  if (s)
    {
      char *p;
      bufsize = strtoul (s, &p, 10);
      if (*p)
	{
	  *errp = sql_open_error_text (ERR_BADBUFSIZE);
	  return ANUBIS_DB_FAIL;
	}
    }

  amp->query = pg_sql_query;
  amp->num_tuples = pg_sql_num_tuples;
  amp->num_columns = pg_sql_num_columns;
  amp->release_result = pg_sql_release_result;
  amp->get_tuple = pg_sql_get_tuple;
  amp->get_column = pg_sql_get_column;

  amp->table = strdup (table);
  amp->authid = strdup (authid);
  amp->passwd = strdup (passwd);
  amp->user = strdup (user);
  amp->rcfile = strdup (rcfile);

  *dp = amp;
  return ANUBIS_DB_SUCCESS;
}

static int
pgsql_db_close (void *d)
{
  struct anubis_sql_db *amp = d;
  struct pgsql_db_data *pdata = amp->data;

  pg_sql_release_result (amp);
  PQfinish (pdata->conn);

  free (amp->data);
  free (amp->table);
  free (amp->authid);
  free (amp->passwd);
  free (amp->user);
  free (amp->rcfile);
  free (amp->buf);
  return ANUBIS_DB_SUCCESS;
}

const char *
pgsql_db_strerror (void *d, int rc)
{
  struct anubis_sql_db *amp = d;
  struct pgsql_db_data *pdata = amp->data;
  return PQerrorMessage (pdata->conn);
}

void
pgsql_db_init (void)
{
  sql_db_init ("pgsql", pgsql_db_open, pgsql_db_close, pgsql_db_strerror);
  sql_db_init ("postgres", pgsql_db_open, pgsql_db_close, pgsql_db_strerror);
}

#endif /* WITH_PGSQL */

/* EOF */

Return to:

Send suggestions and report system problems to the System administrator.