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/* cvm/cvm-sqlite.c - SQLite CVM
* Copyright (C) 2010 Bruce Guenter <bruce@untroubled.org>
*
* 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; either 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Placed into the public domain by Wayne Marshall <wcm@guinix.com>
*/
#include <stdlib.h>
#include <string.h>
#include <sqlite3.h>
#include <str/str.h>
#include <cvm/module.h>
#include <msg/msg.h>
#include "sql.h"
const char program[] = "cvm-sqlite";
const char sql_query_var[] = "CVM_SQLITE_QUERY";
const char sql_pwcmp_var[] = "CVM_SQLITE_PWCMP";
const char sql_postq_var[] = "CVM_SQLITE_POSTQ";
#define MAX_NFIELDS 12
/* struct for one row of query result: */
struct sql_row {
int nfields;
const char* data[MAX_NFIELDS];
};
/* variables in scope of this file: */
static const char *dbfile;
static sqlite3 *db;
static int result_rows;
static struct sql_row row;
/*
** sqlite3 query callback interface
**
** * called for each row in query result
** * cvm design assumes/requires only one row returned per query
** * return of more than one row results in: error #100 (Credentials rejected)
**
*/
static int my_callback(void *callback_arg, int nfields, char **data, char **field_names)
{
int i;
row.nfields = nfields;
for (i = 0; i < MAX_NFIELDS && i < nfields; ++i) {
if (row.data[i] != NULL)
free((char*)row.data[i]);
if (data[i] != NULL)
if ((data[i] = strdup(data[i])) == NULL)
return 1;
row.data[i] = data[i];
}
++result_rows;
return 0;
(void)callback_arg;
(void)field_names;
}
int sql_auth_init(void)
{
int err = 0;
dbfile = getenv("CVM_SQLITE_DB");
if(dbfile == NULL)
return CVME_CONFIG;
err = sqlite3_open(dbfile, &db);
if(err != SQLITE_OK)
return CVME_IO;
err = sqlite3_busy_timeout(db, 1000);
if(err != SQLITE_OK)
return CVME_FATAL;
result_rows = 0;
return 0;
}
int sql_auth_query(const str *query)
{
int err = 0;
result_rows = 0;
err = sqlite3_exec(db, query->s, &my_callback, NULL, NULL);
if(err != SQLITE_OK) return -(CVME_IO | CVME_FATAL);
return result_rows;
}
/* XXX, not sure how this might be used: */
int sql_post_query(const str *query)
{
return 0;
(void)query;
}
/*
** NOTE:
**
** cvm design assumes/requires credential query to select fields
** in an exact specific order
**
** that is, field names don't matter
** what matters is field order in the result set
**
** btw, defining CVM_SQLITE_QUERY in the module environment is *required*
** that is, no default query is provided
**
*/
const char * sql_get_field(int n)
{
return (n < row.nfields ? row.data[n] : NULL);
}
void sql_auth_stop(void)
{
sqlite3_close(db);
return;
}
/* cvm-sqlite.c: EOF */
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