text: /* TDSPool - Connection pooling for TDS based databases
   * Copyright (C) 2001 Brian Bruns
   * Copyright (C) 2005 Frediano Ziglio
   *
   * 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
   *
   */
  
  #include <config.h>
  
  #include <stdarg.h>
  #include <stdio.h>
  #include <ctype.h>
  #include <errno.h>
  
  #if HAVE_STDLIB_H
  #include <stdlib.h>
  #endif /* HAVE_STDLIB_H */
  
  #if HAVE_STRING_H
  #include <string.h>
  #endif
  
  #ifdef HAVE_LIMITS_H
  #include <limits.h>
  #endif
  
  #include "pool.h"
  #include <freetds/configs.h>
  
  #define POOL_STR_SERVER	"server"
  #define POOL_STR_PORT	"port"
  #define POOL_STR_USER	"user"
  #define POOL_STR_PASSWORD	"password"
  #define POOL_STR_DATABASE	"database"
  #define POOL_STR_SERVER_USER	"server user"
  #define POOL_STR_SERVER_PASSWORD	"server password"
  #define POOL_STR_MAX_MBR_AGE	"max member age"
  #define POOL_STR_MAX_POOL_CONN	"max pool conn"
  #define POOL_STR_MIN_POOL_CONN	"min pool conn"
  #define POOL_STR_MAX_POOL_USERS	"max pool users"
  
  typedef struct {
  	TDS_POOL *pool;
  	char **err;
  } conf_params;
  
  static void pool_parse(const char *option, const char *value, void *param);
  static bool pool_read_conf_file(const char *path, const char *poolname, conf_params *params);
  
  bool
  pool_read_conf_files(const char *path, const char *poolname, TDS_POOL * pool, char **err)
  {
  	bool found = false;
  	conf_params params = { pool, err };
  
  	if (path && !found)
  		return pool_read_conf_file(path, poolname, &params);
  
  	if (!found) {
  		char *path = tds_get_home_file(".pool.conf");
  		if (path) {
  			found = pool_read_conf_file(path, poolname, &params);
  			free(path);
  		}
  	}
  
  	if (!found)
  		found = pool_read_conf_file(FREETDS_POOLCONFFILE, poolname, &params);
  
  	return found;
  }
  
  static bool
  pool_read_conf_file(const char *path, const char *poolname, conf_params *params)
  {
  	FILE *in;
  	bool found = false;
  
  	in = fopen(path, "r");
  	if (in) {
  		tdsdump_log(TDS_DBG_INFO1, "Found conf file %s reading sections\n", path);
  		tds_read_conf_section(in, "global", pool_parse, params);
  		rewind(in);
  		found = tds_read_conf_section(in, poolname, pool_parse, params);
  		fclose(in);
  	}
  
  	return found;
  }
  
  /**
   * Parse an unsigned number, returns -1 on error.
   * Returns a signed int to make possible to return negative
   * values for include numbers (we don't need big numbers)
   */
  static int
  pool_get_uint(const char *value)
  {
  	char *end;
  	unsigned long int val;
  
  	errno = 0;
  	val = strtoul(value, &end, 0);
  	if (errno != 0 || end == value || val > INT_MAX)
  		return -1;
  	return (int) val;
  }
  
  static void
  pool_parse(const char *option, const char *value, void *param)
  {
  	conf_params *params = (conf_params *) param;
  	TDS_POOL *pool = params->pool;
  	int val = 0;
  
  	if (!strcmp(option, POOL_STR_PORT)) {
  		val = pool_get_uint(value);
  		if (val < 1 || val >= 65536)
  			val = -1;
  		pool->port = val;
  	} else if (!strcmp(option, POOL_STR_SERVER)) {
  		free(pool->server);
  		pool->server = strdup(value);
  	} else if (!strcmp(option, POOL_STR_USER)) {
  		free(pool->user);
  		pool->user = strdup(value);
  	} else if (!strcmp(option, POOL_STR_DATABASE)) {
  		free(pool->database);
  		pool->database = strdup(value);
  	} else if (!strcmp(option, POOL_STR_PASSWORD)) {
  		free(pool->password);
  		pool->password = strdup(value);
  	} else if (!strcmp(option, POOL_STR_SERVER_USER)) {
  		free(pool->server_user);
  		pool->server_user = strdup(value);
  	} else if (!strcmp(option, POOL_STR_SERVER_PASSWORD)) {
  		free(pool->server_password);
  		pool->server_password = strdup(value);
  	} else if (!strcmp(option, POOL_STR_MAX_MBR_AGE)) {
  		val = pool_get_uint(value);
  		pool->max_member_age = val;
  	} else if (!strcmp(option, POOL_STR_MAX_POOL_CONN)) {
  		val = pool_get_uint(value);
  		pool->max_open_conn = val;
  	} else if (!strcmp(option, POOL_STR_MIN_POOL_CONN)) {
  		val = pool_get_uint(value);
  		pool->min_open_conn = val;
  	}
  	if (val < 0) {
  		free(*params->err);
  		if (asprintf(params->err, "Invalid value '%s' specified for %s", value, option) < 0)
  			*params->err = "Memory error parsing options";
  	}
  }
  