Database stuffs

phoned/db.c

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+/*
+ * Copyright (c) 2005, Dan Ponte
+ *
+ * db.c - database stuff, currently for SQLite
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/* $Amigan: phoned/phoned/db.c,v 1.1 2005/06/18 20:23:45 dcp1990 Exp $ */
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+/* sqlite 3 */
+#include <sqlite3.h>
+
+#include <phoned.h>
+
+#define USERS_TABLE	"users"
+#define CALLS_TABLE	"calls"
+
+pthread_mutex_t dbmx = PTHREAD_MUTEX_INITIALIZER;
+sqlite3 *db; /* lock this shiat, bizzatch */
+
+short db_check_for_table(tablename, dbh) /* needs to be locked before use!!!!!!! */
+	char *tablename;
+	sqlite3 *dbh;
+{
+	const char *tail;
+	const unsigned char *result;
+	sqlite3_stmt *cst;
+	const char* const sql = "SELECT name FROM sqlite_master WHERE type='table'"; /* check for the table in the master table */
+	int rc;
+	if((rc = sqlite3_prepare(dbh, sql, strlen(sql), &cst, &tail)) != SQLITE_OK) {
+		lprintf(error, "db_check_for_table(%s, 0x%p): error in prepare: %s\n", tablename, dbh, sqlite3_errmsg(dbh));
+		return 0;
+	}
+	while((rc = sqlite3_step(cst)) == SQLITE_ROW) {
+		result = sqlite3_column_text(cst, 0);
+		if(strcmp(result, tablename) == 0) {
+			sqlite3_finalize(cst);
+			return 1;
+		}
+	}
+	if(rc != SQLITE_OK && rc != SQLITE_DONE) {
+		lprintf(error, "db_check_for_table(%s, 0x%p): error after loop: %s\n", tablename, dbh, sqlite3_errmsg(dbh));
+		return 0;
+	}
+	sqlite3_finalize(cst);
+	return 0;
+}
+short db_create_calls_table(dbh)
+	sqlite3 *dbh;
+{
+	int rc;
+	char *emsg;
+	const char* const sql = 
+		"CREATE TABLE " CALLS_TABLE " (id INTEGER PRIMARY KEY, dtime INTEGER, number TEXT, name TEXT, ciddate TEXT, cidtime TEXT)";
+	rc = sqlite3_exec(dbh, sql, NULL, NULL, &emsg);
+	if(rc != SQLITE_OK) {
+		lprintf(error, "db_create_calls_table(0x%p): error: %s\n", dbh, emsg);
+		sqlite3_free(emsg);
+		return 0;
+	}
+	return 1;
+}
+
+short db_create_users_table(dbh)
+	sqlite3 *dbh;
+{
+	int rc;
+	char *emsg;
+	const char* const sql = 
+		"CREATE TABLE " USERS_TABLE " (id INTEGER PRIMARY KEY, login TEXT, passmd5 TEXT, privlvl INTEGER)";
+	rc = sqlite3_exec(dbh, sql, NULL, NULL, &emsg);
+	if(rc != SQLITE_OK) {
+		lprintf(error, "db_create_users_table(0x%p): error: %s\n", dbh, emsg);
+		sqlite3_free(emsg);
+		return 0;
+	}
+	return 1;
+}
+
+short db_init(dbfilename)
+	char *dbfilename;
+{
+	int rc;
+	pthread_mutex_lock(&dbmx);
+	if((rc = sqlite3_open(dbfilename, &db))) {
+		lprintf(error, "sqlite engine: Error opening database %s: %s\n", dbfilename, sqlite3_errmsg(db));
+		sqlite3_close(db);
+		pthread_mutex_unlock(&dbmx);
+		return 0;
+	}
+	if(!db_check_for_table(USERS_TABLE, db)) {
+		lprintf(warn, "WARNING: users table didn't exist, you will likely be denied access!\n");
+		if(!db_create_users_table(db)) {
+			pthread_mutex_unlock(&dbmx);
+			return 0;
+		}
+	}
+	if(!db_check_for_table(CALLS_TABLE, db)) {
+		lprintf(info, "Calls table didn't exist, creating...\n");
+		if(!db_create_calls_table(db)) {
+			pthread_mutex_unlock(&dbmx);
+			return 0;
+		}
+	}
+	pthread_mutex_unlock(&dbmx);
+	lprintf(info, "Database opened.\n");
+	return 1;
+}
+
+