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/******************************************************************************
* Project Persistency
* (c) copyright 2012
* Company XS Embedded GmbH
*****************************************************************************/
/******************************************************************************
* This Source Code Form is subject to the terms of the
* Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed
* with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
******************************************************************************/
/**
* @file persistence_client_library_file.c
* @ingroup Persistence client library
* @author Ingo Huerner
* @brief Implementation of the persistence client library.
* Library provides an API to access persistent data
* @see
*/
#include "persistence_client_library_file.h"
#include "../include_protected/persistence_client_library.h"
#include "../include_protected/persistence_client_library_data_access.h"
#include "persistence_client_library_pas_interface.h"
#include "persistence_client_library_handle.h"
#include "persistence_client_library_access_helper.h"
#include <fcntl.h> // for open flags
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int file_close(int fd)
{
int rval = -1;
if(fd < MaxPersHandle)
{
__sync_fetch_and_sub(&gOpenFdArray[fd], FileClosed); // set closed flag
rval = close(fd);
}
return rval;
}
int file_get_size(int fd)
{
int rval = -1;
struct stat buf;
int ret = 0;
ret = fstat(fd, &buf);
if(ret != -1)
{
rval = buf.st_size;
}
return rval;
}
void* file_map_data(void* addr, long size, long offset, int fd)
{
void* ptr = 0;
if(AccessNoLock != isAccessLocked() ) // check if access to persistent data is locked
{
int mapFlag = PROT_WRITE | PROT_READ;
ptr = mmap(addr,size, mapFlag, MAP_SHARED, fd, offset);
}
else
{
ptr = EPERS_MAP_LOCKFS;
}
return ptr;
}
int file_open(unsigned char ldbid, char* resource_id, unsigned char user_no, unsigned char seat_no)
{
int handle = -1, shared_DB = 0, flags = O_RDWR;
PersistenceInfo_s dbContext;
char dbKey[DbKeyMaxLen]; // database key
char dbPath[DbPathMaxLen]; // database location
memset(dbKey, 0, DbKeyMaxLen);
memset(dbPath, 0, DbPathMaxLen);
dbContext.context.ldbid = ldbid;
dbContext.context.seat_no = seat_no;
dbContext.context.user_no = user_no;
// get database context: database path and database key
shared_DB = get_db_context(&dbContext, resource_id, ResIsFile, dbKey, dbPath);
if(shared_DB != -1) // check valid database context
{
handle = open(dbPath, flags);
if(handle != -1)
{
if(handle < MaxPersHandle)
{
__sync_fetch_and_add(&gOpenFdArray[handle], FileOpen); // set open flag
}
else
{
close(handle);
handle = EPERS_MAXHANDLE;
}
}
else
{
printf("file_open ERROR: %s \n", strerror(errno) );
}
}
return handle;
}
int file_read_data(int fd, void * buffer, int buffer_size)
{
return read(fd, buffer, buffer_size);
}
int file_remove(unsigned char ldbid, char* resource_id, unsigned char user_no, unsigned char seat_no)
{
int rval = 0;
if(AccessNoLock != isAccessLocked() ) // check if access to persistent data is locked
{
int shared_DB = 0;
PersistenceInfo_s dbContext;
char dbKey[DbKeyMaxLen]; // database key
char dbPath[DbPathMaxLen]; // database location
memset(dbKey, 0, DbKeyMaxLen);
memset(dbPath, 0, DbPathMaxLen);
dbContext.context.ldbid = ldbid;
dbContext.context.seat_no = seat_no;
dbContext.context.user_no = user_no;
// get database context: database path and database key
shared_DB = get_db_context(&dbContext, resource_id, ResIsFile, dbKey, dbPath);
if(shared_DB != -1) // check valid database context
{
rval = remove(dbPath);
if(rval == -1)
{
printf("file_remove ERROR: %s \n", strerror(errno) );
}
}
}
else
{
rval = EPERS_LOCKFS;
}
return rval;
}
int file_seek(int fd, long int offset, int whence)
{
int rval = 0;
if(AccessNoLock == isAccessLocked() ) // check if access to persistent data is locked
{
rval = lseek(fd, offset, whence);
}
else
{
rval = EPERS_LOCKFS;
}
return rval;
}
int file_unmap_data(void* address, long size)
{
int rval = 0;
if(AccessNoLock != isAccessLocked() ) // check if access to persistent data is locked
{
rval = munmap(address, size);
}
else
{
rval = EPERS_LOCKFS;
}
return rval;
}
int file_write_data(int fd, const void * buffer, int buffer_size)
{
int size = 0;
if(AccessNoLock != isAccessLocked() ) // check if access to persistent data is locked
{
size = write(fd, buffer, buffer_size);
}
else
{
size = EPERS_LOCKFS;
}
return size;
}
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