* AcessMicro VFS
* - Root Filesystem Driver
*/
+#define DEBUG 0
#include <acess.h>
#include <vfs.h>
#include <vfs_ramfs.h>
// === CONSTANTS ===
#define MAX_FILES 64
+#define MAX_FILE_SIZE 1024
// === PROTOTYPES ===
-tVFS_Node *Root_InitDevice(char *Device, char **Options);
+tVFS_Node *Root_InitDevice(const char *Device, const char **Options);
int Root_MkNod(tVFS_Node *Node, const char *Name, Uint Flags);
tVFS_Node *Root_FindDir(tVFS_Node *Node, const char *Name);
char *Root_ReadDir(tVFS_Node *Node, int Pos);
// === CODE ===
/**
- * \fn tVFS_Node *Root_InitDevice(char *Device, char **Options)
* \brief Initialise the root filesystem
*/
-tVFS_Node *Root_InitDevice(char *Device, char **Options)
+tVFS_Node *Root_InitDevice(const char *Device, const char **Options)
{
tRamFS_File *root;
if(strcmp(Device, "root") != 0) {
int Root_MkNod(tVFS_Node *Node, const char *Name, Uint Flags)
{
tRamFS_File *parent = Node->ImplPtr;
- tRamFS_File *child = parent->Data.FirstChild;
+ tRamFS_File *child;
tRamFS_File *prev = (tRamFS_File *) &parent->Data.FirstChild;
ENTER("pNode sName xFlags", Node, Name, Flags);
+ LOG("%i > %i", strlen(Name)+1, sizeof(child->Name));
+ if(strlen(Name) + 1 > sizeof(child->Name))
+ LEAVE_RET('i', 0);
+
// Find last child, while we're at it, check for duplication
- for( ; child; prev = child, child = child->Next )
+ for( child = parent->Data.FirstChild; child; prev = child, child = child->Next )
{
if(strcmp(child->Name, Name) == 0) {
LEAVE('i', 0);
child = Root_int_AllocFile();
memset(child, 0, sizeof(tRamFS_File));
- child->Name = malloc(strlen(Name)+1);
strcpy(child->Name, Name);
child->Parent = parent;
for( ; child && Pos--; child = child->Next ) ;
- if(Pos) return strdup(child->Name);
+ if(child) return strdup(child->Name);
return NULL;
}
Uint64 Root_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
{
tRamFS_File *file = Node->ImplPtr;
+ ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
- if(Offset > Node->Size) return 0;
- if(Length > Node->Size) return 0;
+ if(Offset > Node->Size) {
+ LEAVE('i', 0);
+ return 0;
+ }
+ if(Length > Node->Size) Length = Node->Size;
if(Offset+Length > Node->Size)
Length = Node->Size - Offset;
memcpy(Buffer, file->Data.Bytes+Offset, Length);
-
+ LOG("Buffer = '%.*s'", (int)Length, Buffer);
+
+ LEAVE('i', Length);
return Length;
}
Uint64 Root_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
{
tRamFS_File *file = Node->ImplPtr;
+
+ ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
+
+ if(Offset > Node->Size) {
+ LEAVE('i', -1);
+ return -1;
+ }
+
+ if(Offset + Length > MAX_FILE_SIZE)
+ {
+ Length = MAX_FILE_SIZE - Offset;
+ }
+
+ LOG("Buffer = '%.*s'", (int)Length, Buffer);
// Check if buffer needs to be expanded
if(Offset + Length > Node->Size)
void *tmp = realloc( file->Data.Bytes, Offset + Length );
if(tmp == NULL) {
Warning("Root_Write - Increasing buffer size failed");
+ LEAVE('i', -1);
return -1;
}
file->Data.Bytes = tmp;
Node->Size = Offset + Length;
- //LOG("Expanded buffer to %i bytes", Node->Size);
+ LOG("Expanded buffer to %i bytes", (int)Node->Size);
}
memcpy(file->Data.Bytes+Offset, Buffer, Length);
+ LOG("File - '%.*s'", Node->Size, file->Data.Bytes);
+ LEAVE('i', Length);
return Length;
}
int i;
for( i = 0; i < MAX_FILES; i ++ )
{
- if( RootFS_Files[i].Name == NULL )
+ if( RootFS_Files[i].Name[0] == '\0' )
{
return &RootFS_Files[i];
}