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/*
* Program type: API
*
* Description:
* This program demonstrates constructing a database
* parameter buffer and attaching to a database.
* First manually set sweep interval, then
* The user and password is set to "guest" with expand_dpb
* Then get back the sweep interval and other useful numbers
* with an info call.
* This program will accept up to 4 args. All are positional:
* api15 <db_name> <user> <password> <sweep_interval>
*
* Note: The system administrator needs to create the account
* "guest" with password "guest" on the server before this
* example can be run.
* The contents of this file are subject to the Interbase Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy
* of the License at http://www.Inprise.com/IPL.html
*
* Software distributed under the License is distributed on an
* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
* or implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code was created by Inprise Corporation
* and its predecessors. Portions created by Inprise Corporation are
* Copyright (C) Inprise Corporation.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "example.h"
#include <ibase.h>
int main (int argc, char** argv)
{
isc_db_handle db = NULL; /* database handle */
isc_tr_handle trans = NULL; /* transaction handle */
isc_stmt_handle stmt = NULL;
ISC_STATUS_ARRAY status; /* status vector */
char dbname[128];
char user_name[31], uname[81];
short nullind;
char password[31];
/* Query to find current user name */
static char *query = "SELECT USER FROM RDB$DATABASE";
char * dpb = NULL, /* DB parameter buffer */
*d, *p, *copy;
XSQLDA *sqlda;
short dpb_length = 0;
long l,sweep_interval = 16384;
/* All needed for analyzing an info packet */
char buffer[100]; /* Buffer for db info */
char item;
short length;
long value_out;
/* List of items for db_info call */
static char db_items [] = {
isc_info_page_size,
isc_info_allocation,
isc_info_sweep_interval,
isc_info_end
};
strcpy(user_name, "guest");
strcpy(password, "guest");
strcpy(dbname, "employee.fdb");
if (argc > 1)
strcpy(dbname, argv[1]);
if (argc > 2)
strcpy(user_name, argv[2]);
if (argc > 3)
strcpy(password, argv[3]);
if (argc > 4)
sweep_interval = atoi(argv[4]);
/* Adding sweep interval will be done by hand
** First byte is a version (1), next byte is the isc_dpb_sweep
** byte, then a length (4) then the byte-swapped int we want
** to provide -- 7 bytes total
*/
copy = dpb = (char *) malloc(7);
p = dpb;
*p++ = '\1';
*p++ = isc_dpb_sweep_interval;
*p++ = '\4';
l = isc_vax_integer((char *) &sweep_interval, 4);
d = (char *) &l;
*p++ = *d++;
*p++ = *d++;
*p++ = *d++;
*p = *d;
dpb_length = 7;
/* Add user and password to dpb, much easier. The dpb will be
** new memory.
*/
isc_expand_dpb(&dpb, (short *) &dpb_length,
isc_dpb_user_name, user_name,
isc_dpb_password, password, NULL);
/*
** Connect to the database with the given user and pw.
*/
printf("Attaching to %s with user name: %s, password: %s\n",
dbname, user_name, password);
printf("Resetting sweep interval to %ld\n", sweep_interval);
if (isc_attach_database(status, 0, dbname, &db, dpb_length, dpb))
isc_print_status(status);
/* Prove we are "guest" . Query a single row with the
** key word "USER" to find out who we are
*/
if (isc_start_transaction(status, &trans, 1, &db, 0, NULL))
isc_print_status(status);
/* Prepare sqlda for singleton fetch */
sqlda = (XSQLDA *) malloc(XSQLDA_LENGTH(1));
sqlda->sqln = sqlda->sqld = 1;
sqlda->version = 1;
sqlda->sqlvar[0].sqldata = uname;
sqlda->sqlvar[0].sqlind = &nullind;
/* Yes, it is possible to execute a singleton select without
** a cursor. You must prepare the sqlda by hand.
*/
isc_dsql_allocate_statement(status, &db, &stmt);
if (isc_dsql_prepare(status, &trans, &stmt, 0, query, 1, sqlda))
{
ERREXIT(status, 1)
}
/* Force to type sql_text */
sqlda->sqlvar[0].sqltype = SQL_TEXT;
if (isc_dsql_execute(status, &trans, &stmt, 1, NULL))
{
ERREXIT(status, 1)
}
/* There will only be one row. If it isn't there, something is
** seriously wrong.
*/
if (isc_dsql_fetch(status, &stmt, 1, sqlda))
{
ERREXIT(status, 1)
}
isc_dsql_free_statement(status, &stmt, DSQL_close);
uname[sqlda->sqlvar[0].sqllen] = '\0';
printf ("New user = %s\n", uname);
if (isc_commit_transaction(status, &trans))
{
ERREXIT(status, 1)
}
/* Look at the database to see some parameters (like sweep
** The database_info call returns a buffer full of type, length,
** and value sets until info_end is reached
*/
if (isc_database_info(status, &db, sizeof(db_items), db_items,
sizeof (buffer), buffer))
{
ERREXIT(status, 1)
}
for (d = buffer; *d != isc_info_end;)
{
value_out = 0;
item = *d++;
length = (short) isc_vax_integer (d, 2);
d += 2;
switch (item)
{
case isc_info_end:
break;
case isc_info_page_size:
value_out = isc_vax_integer (d, length);
printf ("PAGE_SIZE %ld \n", value_out);
break;
case isc_info_allocation:
value_out = isc_vax_integer (d, length);
printf ("Number of DB pages allocated = %ld \n",
value_out);
break;
case isc_info_sweep_interval:
value_out = isc_vax_integer (d, length);
printf ("Sweep interval = %ld \n", value_out);
break;
}
d += length;
}
isc_detach_database(status, &db);
isc_free(dpb);
free(copy);
free(sqlda);
return 0;
}
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