Hello,

I am writting here because I would like to know why my code cause
an "segmentation fault" with berkeley db library.
Creating handle works well but closing it.


#include <db.h>
#include <stdio.h>

DB *h_journal;

/****************************************
*****************************************
** CREATE handle **
** **
*****************************************
*****************************************/
int create_handle(DB *db_handle, u_int32_t flags)
{
int ret;

ret = db_create(&db_handle, NULL, 0);
if (ret != 0)
{
db_handle->close(db_handle, 0);
return (ret);
}
else
{
ret = db_handle->set_flags(db_handle, flags);
if (ret != 0) return (ret);
}
return (0);
}

/****************************************
*****************************************
** CLOSE a handle **
** **
*****************************************
*****************************************/
int close_handle(DB *db_handle)
{
db_handle->close(db_handle, 0);
}

void main(void)
{
if ( create_handle(h_journal, DB_DUPSORT) )
printf("\n--Error creating handle\n"); // This line works well
close_handle(h_journal); // This line makes an "SEGMENTATION FAULT"
error
}

Hi,

The problem is pointer confusion -- when you call db_create:

ret = db_create(&db_handle, NULL, 0);

this will update db_handle on the stack, but won't update the h_journal
global variable. To fix this, you'll need to make your create_handle
function take a DB **, and pass &h_journal from main().

Regards,
Michael.