mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-11-04 18:45:05 +01:00
1021 lines
29 KiB
C++
1021 lines
29 KiB
C++
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <sys/iosupport.h>
|
|
#include <sys/errno.h>
|
|
#include <fcntl.h>
|
|
#include <ogcsys.h>
|
|
#include <new>
|
|
#include "ramdisk.h"
|
|
|
|
#define NAMELENMAX 0x80
|
|
#define MAXPATHLEN 0x100
|
|
|
|
#define FPRINTF(f, ...) {FILE*_fp=fopen("SD:/log.log", "a"); if(_fp) { fprintf(_fp, "%s(%i):" f "\n", __FILE__, __LINE__, ##__VA_ARGS__); fclose(_fp);}}
|
|
|
|
|
|
|
|
class RAMDISK_PARTITION;
|
|
class RAMDISK_LINK_ENTRY;
|
|
class RAMDISK_DIR_ENTRY;
|
|
class RAMDISK_FILE_ENTRY;
|
|
class RAMDISK_BASE_ENTRY
|
|
{
|
|
public:
|
|
RAMDISK_BASE_ENTRY(const char *Name, RAMDISK_DIR_ENTRY *Parent);
|
|
virtual ~RAMDISK_BASE_ENTRY();
|
|
void Rename(const char *Name);
|
|
RAMDISK_LINK_ENTRY *IsLink();
|
|
RAMDISK_DIR_ENTRY *IsDir();
|
|
RAMDISK_FILE_ENTRY *IsFile();
|
|
RAMDISK_PARTITION *GetPartition();
|
|
char *name;
|
|
RAMDISK_DIR_ENTRY *parent;
|
|
RAMDISK_BASE_ENTRY *next;
|
|
};
|
|
class RAMDISK_LINK_ENTRY : public RAMDISK_BASE_ENTRY
|
|
{
|
|
public:
|
|
RAMDISK_LINK_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent, RAMDISK_BASE_ENTRY *Link);
|
|
RAMDISK_BASE_ENTRY *link;
|
|
};
|
|
class RAMDISK_DIR_ENTRY : public RAMDISK_BASE_ENTRY
|
|
{
|
|
public:
|
|
RAMDISK_DIR_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent);
|
|
~RAMDISK_DIR_ENTRY();
|
|
RAMDISK_BASE_ENTRY *FindEntry(const char* Path);
|
|
RAMDISK_FILE_ENTRY *CreateFile(const char *Filename);
|
|
RAMDISK_DIR_ENTRY *CreateDir(const char *Filename);
|
|
void RemoveEntry(RAMDISK_BASE_ENTRY *Entry);
|
|
RAMDISK_BASE_ENTRY *first;
|
|
RAMDISK_BASE_ENTRY *last;
|
|
};
|
|
typedef struct
|
|
{
|
|
RAMDISK_DIR_ENTRY *dir;
|
|
RAMDISK_BASE_ENTRY *current_entry;
|
|
} DIR_STRUCT;
|
|
|
|
|
|
class RAMDISK_PARTITION : public RAMDISK_DIR_ENTRY
|
|
{
|
|
public:
|
|
RAMDISK_PARTITION(const char *Mountpoint, bool AutoMount);
|
|
RAMDISK_BASE_ENTRY *FindEntry(const char* Path);
|
|
RAMDISK_DIR_ENTRY *FindPath(const char* Path, const char **Basename=NULL);
|
|
RAMDISK_DIR_ENTRY *cwd;
|
|
bool automount;
|
|
};
|
|
|
|
class FILE_DATA
|
|
{
|
|
public:
|
|
FILE_DATA(size_t Len);
|
|
~FILE_DATA();
|
|
u8 *data;
|
|
size_t len;
|
|
FILE_DATA *next;
|
|
};
|
|
typedef struct
|
|
{
|
|
RAMDISK_FILE_ENTRY *file;
|
|
bool isLink;
|
|
u32 current_pos;
|
|
bool read;
|
|
bool write;
|
|
} FILE_STRUCT;
|
|
class RAMDISK_FILE_ENTRY : public RAMDISK_BASE_ENTRY
|
|
{
|
|
public:
|
|
RAMDISK_FILE_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent);
|
|
~RAMDISK_FILE_ENTRY();
|
|
bool Truncate(size_t newLen);
|
|
bool AddCluster(size_t size);
|
|
size_t Read(struct _reent *r, FILE_STRUCT *fileStruct, char *ptr, size_t len);
|
|
size_t Write(struct _reent *r, FILE_STRUCT *fileStruct, const char *ptr, size_t len);
|
|
size_t file_len;
|
|
size_t cluster_len;
|
|
FILE_DATA *first_cluster;
|
|
FILE_DATA *last_cluster;
|
|
};
|
|
|
|
RAMDISK_LINK_ENTRY::RAMDISK_LINK_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent, RAMDISK_BASE_ENTRY *Link)
|
|
:
|
|
RAMDISK_BASE_ENTRY(Name, Parent),
|
|
link(Link)
|
|
{
|
|
|
|
}
|
|
|
|
|
|
RAMDISK_BASE_ENTRY::RAMDISK_BASE_ENTRY(const char *Name, RAMDISK_DIR_ENTRY *Parent)
|
|
:
|
|
name(strdup(Name)),
|
|
parent(Parent),
|
|
next(NULL)
|
|
{}
|
|
RAMDISK_BASE_ENTRY::~RAMDISK_BASE_ENTRY()
|
|
{
|
|
free(name);
|
|
if(parent) parent->RemoveEntry(this);
|
|
}
|
|
void RAMDISK_BASE_ENTRY::Rename(const char *Name)
|
|
{
|
|
free(name);
|
|
name = strdup(Name);
|
|
}
|
|
|
|
inline RAMDISK_LINK_ENTRY *RAMDISK_BASE_ENTRY::IsLink()
|
|
{
|
|
return dynamic_cast<RAMDISK_LINK_ENTRY*>(this);
|
|
}
|
|
inline RAMDISK_DIR_ENTRY *RAMDISK_BASE_ENTRY::IsDir()
|
|
{
|
|
RAMDISK_LINK_ENTRY *lentry = dynamic_cast<RAMDISK_LINK_ENTRY*>(this);
|
|
return dynamic_cast<RAMDISK_DIR_ENTRY*>(lentry ? lentry->link : this);
|
|
}
|
|
inline RAMDISK_FILE_ENTRY *RAMDISK_BASE_ENTRY::IsFile()
|
|
{
|
|
RAMDISK_LINK_ENTRY *lentry = dynamic_cast<RAMDISK_LINK_ENTRY*>(this);
|
|
return dynamic_cast<RAMDISK_FILE_ENTRY*>(lentry ? lentry->link : this);
|
|
}
|
|
RAMDISK_PARTITION *RAMDISK_BASE_ENTRY::GetPartition()
|
|
{
|
|
for(RAMDISK_BASE_ENTRY *entry = this; entry; entry = entry->parent)
|
|
if(entry->parent == NULL)
|
|
return dynamic_cast<RAMDISK_PARTITION *>(entry);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
RAMDISK_DIR_ENTRY::RAMDISK_DIR_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent)
|
|
:
|
|
RAMDISK_BASE_ENTRY(Name, Parent)
|
|
{
|
|
RAMDISK_BASE_ENTRY* entry = new RAMDISK_LINK_ENTRY(".", this, this);
|
|
first = entry;
|
|
last = entry;
|
|
if(parent)
|
|
{
|
|
entry = new RAMDISK_LINK_ENTRY("..", this, parent);
|
|
first->next = entry;
|
|
last = entry;
|
|
}
|
|
}
|
|
RAMDISK_DIR_ENTRY::~RAMDISK_DIR_ENTRY()
|
|
{
|
|
while(first)
|
|
{
|
|
first->parent = NULL; // ~RAMDISK_BASE_ENTRY() no calls RemoveEntry()
|
|
RAMDISK_BASE_ENTRY* next = first->next;
|
|
delete first;
|
|
first = next;
|
|
}
|
|
}
|
|
|
|
RAMDISK_BASE_ENTRY *RAMDISK_DIR_ENTRY::FindEntry(const char* Path)
|
|
{
|
|
const char* dirpath = Path;
|
|
const char* cptr;
|
|
while( dirpath[0] == '/') dirpath++; // move past leading '/'
|
|
|
|
if(dirpath[0] == '\0') // this path is found
|
|
return this;
|
|
|
|
cptr = strchr(dirpath,'/'); // find next '/'
|
|
if(cptr == NULL)
|
|
cptr = strchr(dirpath,'\0'); // cptr at end
|
|
for(RAMDISK_BASE_ENTRY *curr = first; curr; curr=curr->next)
|
|
{
|
|
if( strncmp(curr->name, dirpath, cptr-dirpath) == 0)
|
|
{
|
|
if(RAMDISK_DIR_ENTRY *dir = curr->IsDir())
|
|
return dir->FindEntry(cptr);
|
|
else
|
|
return curr;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
RAMDISK_FILE_ENTRY *RAMDISK_DIR_ENTRY::CreateFile(const char *Filename)
|
|
{
|
|
try
|
|
{
|
|
RAMDISK_FILE_ENTRY* file = new RAMDISK_FILE_ENTRY(Filename, this);
|
|
if(!first) first = file;
|
|
last->next = file;
|
|
last = file;
|
|
return file;
|
|
}
|
|
catch(...) { return NULL; }
|
|
}
|
|
RAMDISK_DIR_ENTRY *RAMDISK_DIR_ENTRY::CreateDir(const char *Filename)
|
|
{
|
|
try
|
|
{
|
|
RAMDISK_DIR_ENTRY* dir = new RAMDISK_DIR_ENTRY(Filename, this);
|
|
if(!first) first = dir;
|
|
last->next = dir;
|
|
last = dir;
|
|
return dir;
|
|
}
|
|
catch(...) { return NULL; }
|
|
}
|
|
void RAMDISK_DIR_ENTRY::RemoveEntry(RAMDISK_BASE_ENTRY *Entry)
|
|
{
|
|
RAMDISK_BASE_ENTRY **p_last = NULL;
|
|
for(RAMDISK_BASE_ENTRY **curr = &first; *curr; curr=&((*curr)->next) )
|
|
{
|
|
if( *curr == Entry )
|
|
{
|
|
*curr = Entry->next;
|
|
if(Entry->next == NULL) // entry is last
|
|
last = *p_last;
|
|
break;
|
|
}
|
|
p_last = curr;
|
|
}
|
|
}
|
|
|
|
RAMDISK_PARTITION::RAMDISK_PARTITION(const char *Mountpoint, bool AutoMount) :
|
|
RAMDISK_DIR_ENTRY(Mountpoint, NULL),
|
|
cwd(this),
|
|
automount(AutoMount)
|
|
{
|
|
}
|
|
|
|
RAMDISK_BASE_ENTRY * RAMDISK_PARTITION::FindEntry(const char* path)
|
|
{
|
|
char *cptr;
|
|
if ( (cptr=strchr(path,':')) )
|
|
path=cptr+1; //move path past any device names
|
|
if ( strchr(path, ':') != NULL )
|
|
{
|
|
// r->_errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
if(*path=='/') // if first character is '/' use absolute root path
|
|
return RAMDISK_DIR_ENTRY::FindEntry(path);
|
|
else // else use current working dir
|
|
return cwd->FindEntry(path);
|
|
}
|
|
RAMDISK_DIR_ENTRY * RAMDISK_PARTITION::FindPath(const char* path, const char **basename)
|
|
{
|
|
int pathLen = strlen(path);
|
|
char dirfilename[pathLen+1]; // to hold a full path
|
|
const char *cptr = path+pathLen; // find the end...
|
|
const char *filename = NULL; // to hold filename
|
|
while(cptr-->path) //search till start
|
|
{
|
|
if((*cptr=='/') || (*cptr==':')) // split at either / or : (whichever comes first form the end!)
|
|
{
|
|
cptr++;
|
|
strlcpy(dirfilename, path, 1+cptr-path); //copy string up till and including / or :
|
|
filename = cptr; //filename = now remainder of string
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!filename)
|
|
{
|
|
filename = path; //filename = complete path
|
|
dirfilename[0] = 0; //make directory path ""
|
|
}
|
|
RAMDISK_BASE_ENTRY *entry = FindEntry(dirfilename);
|
|
if(entry)
|
|
{
|
|
if(basename) *basename = filename;
|
|
return entry->IsDir();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
FILE_DATA::FILE_DATA(size_t Len) :
|
|
next(NULL)
|
|
{
|
|
data = new u8[Len];
|
|
len = Len;
|
|
memset(data, 0, len);
|
|
}
|
|
FILE_DATA::~FILE_DATA()
|
|
{
|
|
delete [] data;
|
|
delete next;
|
|
}
|
|
|
|
|
|
RAMDISK_FILE_ENTRY::RAMDISK_FILE_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent)
|
|
:
|
|
RAMDISK_BASE_ENTRY(Name, Parent),
|
|
file_len(0),
|
|
cluster_len(0),
|
|
first_cluster(NULL),
|
|
last_cluster(NULL)
|
|
{}
|
|
RAMDISK_FILE_ENTRY::~RAMDISK_FILE_ENTRY()
|
|
{
|
|
Truncate(0);
|
|
}
|
|
#define CLUSTER_SIZE 4*1024
|
|
|
|
bool RAMDISK_FILE_ENTRY::Truncate(size_t newSize)
|
|
{
|
|
if (newSize > cluster_len)
|
|
{
|
|
// Expanding the file over cluster_len
|
|
return AddCluster(newSize - cluster_len);
|
|
}
|
|
else if (newSize < file_len)
|
|
{
|
|
// Shrinking the file
|
|
FILE_DATA *prev_cluster = NULL;
|
|
size_t len = 0;
|
|
for(FILE_DATA **p_cluster = &first_cluster; *p_cluster; p_cluster = &(*p_cluster)->next)
|
|
{
|
|
if(len >= newSize)
|
|
{
|
|
last_cluster = prev_cluster;
|
|
delete *p_cluster;
|
|
(*p_cluster) = NULL;
|
|
break;
|
|
}
|
|
len += (*p_cluster)->len;
|
|
prev_cluster = *p_cluster;
|
|
}
|
|
}
|
|
file_len = newSize;
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
bool RAMDISK_FILE_ENTRY::AddCluster(size_t len)
|
|
{
|
|
if(len < CLUSTER_SIZE)
|
|
len = CLUSTER_SIZE;
|
|
try
|
|
{
|
|
*(last_cluster ? &last_cluster->next : &first_cluster) = last_cluster = new FILE_DATA(len);
|
|
cluster_len += len;
|
|
return true;
|
|
}
|
|
catch(...) { return false; }
|
|
}
|
|
|
|
size_t RAMDISK_FILE_ENTRY::Read(struct _reent *r, FILE_STRUCT *fileStruct, char *ptr, size_t len)
|
|
{
|
|
if (!fileStruct->read)
|
|
{
|
|
r->_errno = EBADF;
|
|
return 0;
|
|
}
|
|
// Short circuit cases where len is 0 (or less)
|
|
if (len <= 0)
|
|
return 0;
|
|
// Don't try to read if the read pointer is past the end of file
|
|
if (fileStruct->current_pos >= file_len)
|
|
{
|
|
r->_errno = EOVERFLOW;
|
|
return 0;
|
|
}
|
|
|
|
// Don't read past end of file
|
|
if (len + fileStruct->current_pos > file_len)
|
|
{
|
|
r->_errno = EOVERFLOW;
|
|
len = fileStruct->current_pos - file_len;
|
|
}
|
|
|
|
off_t pos = fileStruct->current_pos;
|
|
size_t readed = 0;
|
|
size_t max_len = file_len;
|
|
for(FILE_DATA *cluster = first_cluster; cluster; cluster = cluster->next)
|
|
{
|
|
if(pos > cluster->len)
|
|
{
|
|
pos -= cluster->len;
|
|
max_len -= cluster->len;
|
|
}
|
|
else
|
|
{
|
|
size_t read = max_len;
|
|
if(read > cluster->len)
|
|
read = cluster->len;
|
|
read -= pos;
|
|
if(read > len)
|
|
read = len;
|
|
memcpy(ptr, &(cluster->data[pos]), read);
|
|
readed += read;
|
|
ptr += read;
|
|
len -= read;
|
|
if(len == 0)
|
|
break;
|
|
pos -= cluster->len;
|
|
max_len -= cluster->len;
|
|
|
|
}
|
|
}
|
|
fileStruct->current_pos += readed;
|
|
return readed;
|
|
}
|
|
size_t RAMDISK_FILE_ENTRY::Write(struct _reent *r, FILE_STRUCT *fileStruct, const char *ptr, size_t len)
|
|
{
|
|
|
|
if (!fileStruct->write)
|
|
{
|
|
r->_errno = EBADF;
|
|
return 0;
|
|
}
|
|
// Short circuit cases where len is 0 (or less)
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
off_t pos = fileStruct->current_pos;
|
|
if(cluster_len < (pos+len) && !AddCluster((pos+len) - cluster_len))
|
|
{
|
|
// Couldn't get a cluster, so abort
|
|
r->_errno = ENOSPC;
|
|
return 0;
|
|
}
|
|
if(file_len < (pos+len))
|
|
file_len = (pos+len);
|
|
|
|
size_t written = 0;
|
|
size_t max_len = cluster_len;
|
|
for(FILE_DATA *cluster = first_cluster; cluster; cluster = cluster->next)
|
|
{
|
|
if(pos > cluster->len)
|
|
{
|
|
pos -= cluster->len;
|
|
max_len -= cluster->len;
|
|
}
|
|
else
|
|
{
|
|
size_t write = cluster->len - pos;
|
|
if(write > len) write = len;
|
|
memcpy(&(cluster->data[pos]), ptr, write);
|
|
written += write;
|
|
ptr += write;
|
|
len -= write;
|
|
if(len == 0)
|
|
break;
|
|
pos -= cluster->len;
|
|
max_len -= cluster->len;
|
|
}
|
|
}
|
|
fileStruct->current_pos += written;
|
|
return written;
|
|
}
|
|
|
|
|
|
static int ramdiskFS_open_r(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
|
|
static int ramdiskFS_close_r(struct _reent *r, int fd);
|
|
static int ramdiskFS_write_r(struct _reent *r, int fd, const char *ptr, size_t len);
|
|
static int ramdiskFS_read_r(struct _reent *r, int fd, char *ptr, size_t len);
|
|
static off_t ramdiskFS_seek_r(struct _reent *r, int fd, off_t pos, int dir);
|
|
static int ramdiskFS_fstat_r(struct _reent *r, int fd, struct stat *st);
|
|
static int ramdiskFS_stat_r(struct _reent *r, const char *file, struct stat *st);
|
|
static int ramdiskFS_unlink_r(struct _reent *r, const char *name);
|
|
static int ramdiskFS_chdir_r(struct _reent *r, const char *name);
|
|
static int ramdiskFS_mkdir_r(struct _reent *r, const char *path, int mode);
|
|
|
|
static DIR_ITER* ramdiskFS_diropen_r(struct _reent *r, DIR_ITER *dirState, const char *path);
|
|
static int ramdiskFS_dirreset_r(struct _reent *r, DIR_ITER *dirState);
|
|
static int ramdiskFS_dirnext_r(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *st);
|
|
static int ramdiskFS_dirclose_r(struct _reent *r, DIR_ITER *dirState);
|
|
|
|
static int ramdiskFS_ftruncate_r(struct _reent *r, int fd, off_t len);
|
|
|
|
|
|
static devoptab_t ramdiskFS_devoptab={
|
|
"ramdisk",
|
|
sizeof(FILE_STRUCT), // int structSize;
|
|
&ramdiskFS_open_r, // int (*open_r)(struct _reent *r, void *fileStruct, const char *path,int
|
|
// flags,int mode);
|
|
&ramdiskFS_close_r, // int (*close_r)(struct _reent *r, int fd);
|
|
&ramdiskFS_write_r, // int (*write_r)(struct _reent *r, int fd, const char *ptr, int len);
|
|
&ramdiskFS_read_r, // int (*read_r)(struct _reent *r, int fd, char *ptr, int len);
|
|
&ramdiskFS_seek_r, // off_t (*seek_r)(struct _reent *r, off_t fd, int pos, int dir);
|
|
&ramdiskFS_fstat_r, // int (*fstat_r)(struct _reent *r, int fd, struct stat *st);
|
|
&ramdiskFS_stat_r, // int (*stat_r)(struct _reent *r, const char *file, struct stat *st);
|
|
NULL, // int (*link_r)(struct _reent *r, const char *existing, const char *newLink);
|
|
&ramdiskFS_unlink_r, // int (*unlink_r)(struct _reent *r, const char *name);
|
|
&ramdiskFS_chdir_r, // int (*chdir_r)(struct _reent *r, const char *name);
|
|
NULL, // int (*rename_r) (struct _reent *r, const char *oldName, const char *newName);
|
|
ramdiskFS_mkdir_r, // int (*mkdir_r) (struct _reent *r, const char *path, int mode);
|
|
sizeof(DIR_STRUCT), // int dirStateSize;
|
|
&ramdiskFS_diropen_r, // DIR_ITER* (*diropen_r)(struct _reent *r, DIR_ITER *dirState, const char *path);
|
|
&ramdiskFS_dirreset_r, // int (*dirreset_r)(struct _reent *r, DIR_ITER *dirState);
|
|
&ramdiskFS_dirnext_r, // int (*dirnext_r)(struct _reent *r, DIR_ITER *dirState, char *filename,
|
|
// struct stat *filestat);
|
|
&ramdiskFS_dirclose_r, // int (*dirclose_r)(struct _reent *r, DIR_ITER *dirState);
|
|
NULL, // statvfs_r
|
|
&ramdiskFS_ftruncate_r, // int (*ftruncate_r)(struct _reent *r, int fd, off_t len);
|
|
|
|
NULL, // fsync_r,
|
|
NULL // Device data
|
|
};
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static inline RAMDISK_PARTITION* ramdiskFS_getPartitionFromPath(const char* path) {
|
|
//---------------------------------------------------------------------------------
|
|
const devoptab_t *devops = GetDeviceOpTab(path);
|
|
if (!devops)
|
|
return NULL;
|
|
return *((RAMDISK_PARTITION**)devops->deviceData);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
// File functions
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_open_r(struct _reent *r, void *file_Struct, const char *path, int flags, int mode) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("ramdiskFS_open_r(%s)", path);
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)file_Struct;
|
|
|
|
|
|
RAMDISK_PARTITION *partition = ramdiskFS_getPartitionFromPath(path);
|
|
if ( partition == NULL )
|
|
{
|
|
r->_errno = ENODEV;
|
|
return -1;
|
|
}
|
|
FPRINTF("ramdiskFS_open_r Partition found");
|
|
|
|
if ((flags & 0x03) == O_RDONLY) {
|
|
// Open the file for read-only access
|
|
fileStruct->read = true;
|
|
fileStruct->write = false;
|
|
} else if ((flags & 0x03) == O_WRONLY) {
|
|
// Open file for write only access
|
|
fileStruct->read = false;
|
|
fileStruct->write = true;
|
|
} else if ((flags & 0x03) == O_RDWR) {
|
|
// Open file for read/write access
|
|
fileStruct->read = true;
|
|
fileStruct->write = true;
|
|
} else {
|
|
r->_errno = EACCES;
|
|
return -1;
|
|
}
|
|
RAMDISK_BASE_ENTRY *entry = partition->FindEntry(path);
|
|
|
|
// The file shouldn't exist if we are trying to create it
|
|
if (entry && (flags & O_CREAT) && (flags & O_EXCL))
|
|
{
|
|
r->_errno = EEXIST;
|
|
return -1;
|
|
}
|
|
FPRINTF("ok");
|
|
// It should not be a directory if we're openning a file,
|
|
if (entry && entry->IsDir())
|
|
{
|
|
r->_errno = EISDIR;
|
|
return -1;
|
|
}
|
|
FPRINTF("ok");
|
|
|
|
fileStruct->isLink = entry ? entry->IsLink() : false;
|
|
fileStruct->file = entry ? entry->IsFile() : NULL;
|
|
if(!fileStruct->file) // entry not exists
|
|
{
|
|
if (flags & O_CREAT)
|
|
{
|
|
const char *filename;
|
|
RAMDISK_DIR_ENTRY *dir = partition->FindPath(path, &filename);
|
|
if(!dir)
|
|
{
|
|
r->_errno = ENOTDIR;
|
|
return -1;
|
|
}
|
|
fileStruct->file = dir->CreateFile(filename);
|
|
}
|
|
else
|
|
{
|
|
// file doesn't exist, and we aren't creating it
|
|
r->_errno = ENOENT;
|
|
return -1;
|
|
}
|
|
}
|
|
FPRINTF("ok");
|
|
if(fileStruct->file)
|
|
{
|
|
fileStruct->current_pos = 0;
|
|
// Truncate the file if requested
|
|
if ((flags & O_TRUNC) && fileStruct->write)
|
|
fileStruct->file->Truncate(0);
|
|
if (flags & O_APPEND)
|
|
fileStruct->current_pos = fileStruct->file->file_len;
|
|
return 0;
|
|
FPRINTF("ramdiskFS_open_r ok");
|
|
}
|
|
r->_errno = ENOENT;
|
|
return(-1);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_close_r(struct _reent *r, int fd) {
|
|
//---------------------------------------------------------------------------------
|
|
return(0);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_read_r(struct _reent *r, int fd, char *ptr, size_t len) {
|
|
//---------------------------------------------------------------------------------
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)fd;
|
|
return fileStruct->file->Read(r, fileStruct, ptr, len);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_write_r(struct _reent *r, int fd, const char *ptr, size_t len) {
|
|
//---------------------------------------------------------------------------------
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)fd;
|
|
return fileStruct->file->Write(r, fileStruct, ptr, len);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static off_t ramdiskFS_seek_r(struct _reent *r, int fd, off_t pos, int dir) {
|
|
//---------------------------------------------------------------------------------
|
|
//need check for eof here...
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)fd;
|
|
FPRINTF("ramdiskFS_seek_r(%s)", fileStruct->file->name);
|
|
|
|
switch(dir)
|
|
{
|
|
case SEEK_SET:
|
|
break;
|
|
case SEEK_CUR:
|
|
pos += fileStruct->current_pos;
|
|
break;
|
|
case SEEK_END:
|
|
pos += fileStruct->file->file_len; // set start to end of file
|
|
break;
|
|
default:
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
return fileStruct->current_pos = pos;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_fstat_r(struct _reent *r, int fd, struct stat *st) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("ramdiskFS_fstat_r");
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)fd;
|
|
|
|
st->st_mode = fileStruct->isLink ? S_IFLNK : S_IFREG;
|
|
st->st_size = fileStruct->file->file_len;
|
|
return(0);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_stat_r(struct _reent *r, const char *file, struct stat *st) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("ramdiskFS_stat_r(%s)", file);
|
|
FILE_STRUCT fileStruct;
|
|
DIR_STRUCT dirStruct;
|
|
DIR_ITER dirState;
|
|
dirState.dirStruct=&dirStruct; //create a temp dirstruct
|
|
int ret;
|
|
|
|
if( ramdiskFS_open_r(r, &fileStruct, file, 0, 0) ==0 )
|
|
{
|
|
ret = ramdiskFS_fstat_r(r, (int)&fileStruct, st);
|
|
ramdiskFS_close_r(r, (int)&fileStruct);
|
|
return(ret);
|
|
}
|
|
else if( (ramdiskFS_diropen_r(r, &dirState, file)!=NULL) )
|
|
{
|
|
st->st_mode = S_IFDIR;
|
|
ramdiskFS_dirclose_r(r, &dirState);
|
|
return(0);
|
|
}
|
|
r->_errno = ENOENT;
|
|
return(-1);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_unlink_r(struct _reent *r, const char *name) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("ramdiskFS_unlink_r(%s)", name);
|
|
RAMDISK_PARTITION *partition = ramdiskFS_getPartitionFromPath(name);
|
|
if ( partition == NULL )
|
|
{
|
|
r->_errno = ENODEV;
|
|
return -1;
|
|
}
|
|
RAMDISK_BASE_ENTRY *entry = partition->FindEntry(name);
|
|
if(!entry)
|
|
{
|
|
r->_errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
if (entry->IsLink())
|
|
{
|
|
if(entry->name[0] == '.' && (entry->name[1] == '\0' || (entry->name[1] == '.' && entry->name[2] == '\0')))
|
|
{
|
|
r->_errno = EPERM;
|
|
return -1;
|
|
}
|
|
delete entry;
|
|
return 0;
|
|
}
|
|
|
|
if (RAMDISK_DIR_ENTRY *dir = entry->IsDir())
|
|
{
|
|
for(RAMDISK_BASE_ENTRY *entry = dir->first; entry; entry = entry->next)
|
|
{
|
|
if(!(entry->name[0] == '.' && (entry->name[1] == '\0'
|
|
|| (entry->name[1] == '.' && entry->name[2] == '\0'))))
|
|
{
|
|
r->_errno = EPERM;
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
delete entry;
|
|
return 0;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_chdir_r(struct _reent *r, const char *name) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("ramdiskFS_chdir_r(%s)", name);
|
|
DIR_STRUCT dirStruct;
|
|
DIR_ITER dirState;
|
|
dirState.dirStruct=&dirStruct;
|
|
if( (name == NULL) )
|
|
{
|
|
r->_errno = ENODEV;
|
|
return -1;
|
|
}
|
|
|
|
if( (ramdiskFS_diropen_r(r, &dirState, name) == NULL) )
|
|
return -1;
|
|
|
|
RAMDISK_PARTITION *partition = dirStruct.dir->GetPartition();
|
|
if ( partition == NULL )
|
|
{
|
|
r->_errno = ENODEV;
|
|
return -1;
|
|
}
|
|
partition->cwd = dirStruct.dir;
|
|
ramdiskFS_dirclose_r(r, &dirState);
|
|
FPRINTF("ok");
|
|
return 0;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_mkdir_r(struct _reent *r, const char *path, int mode) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("ramdiskFS_mkdir_r(%s)", path);
|
|
RAMDISK_PARTITION *partition = ramdiskFS_getPartitionFromPath(path);
|
|
if ( partition == NULL )
|
|
{
|
|
r->_errno = ENODEV;
|
|
return -1;
|
|
}
|
|
RAMDISK_BASE_ENTRY *entry = partition->FindEntry(path);
|
|
if (entry)
|
|
{
|
|
r->_errno = EEXIST;
|
|
return -1;
|
|
}
|
|
const char *filename;
|
|
RAMDISK_DIR_ENTRY *dir = partition->FindPath(path, &filename);
|
|
if(!dir)
|
|
{
|
|
r->_errno = ENOTDIR;
|
|
return -1;
|
|
}
|
|
dir->CreateDir(filename);
|
|
return 0;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
// Directory functions
|
|
//---------------------------------------------------------------------------------
|
|
static DIR_ITER* ramdiskFS_diropen_r(struct _reent *r, DIR_ITER *dirState, const char *path) {
|
|
//---------------------------------------------------------------------------------
|
|
|
|
FPRINTF("DirOpen %s", path);
|
|
DIR_STRUCT *dirStruct = (DIR_STRUCT*)dirState->dirStruct;
|
|
char *cptr;
|
|
|
|
RAMDISK_PARTITION *partition = ramdiskFS_getPartitionFromPath(path);
|
|
FPRINTF("partition %p", partition);
|
|
if ( partition == NULL )
|
|
{
|
|
r->_errno = ENODEV;
|
|
return NULL;
|
|
}
|
|
|
|
if ( (cptr=strchr(path,':')) )
|
|
path=cptr+1; //move path past any device names
|
|
if ( strchr(path, ':') != NULL )
|
|
{
|
|
r->_errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
if(*path=='/') //if first character is '/' use absolute root path
|
|
dirStruct->dir = partition; //first root dir
|
|
else
|
|
dirStruct->dir = partition->cwd; //else use current working dir
|
|
|
|
RAMDISK_BASE_ENTRY *entry = dirStruct->dir->FindEntry(path);
|
|
FPRINTF("entry %p", entry);
|
|
if(entry==NULL)
|
|
{
|
|
r->_errno = ENOENT;
|
|
return NULL;
|
|
}
|
|
dirStruct->dir = entry->IsDir();
|
|
if(dirStruct->dir==NULL)
|
|
{
|
|
r->_errno = ENOTDIR;
|
|
return NULL;
|
|
}
|
|
dirStruct->current_entry = dirStruct->dir->first;
|
|
return dirState;
|
|
}
|
|
|
|
/*Consts containing relative system path strings*/
|
|
//reset dir to start of entry selected by dirStruct->cur_dir_id
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_dirreset_r(struct _reent *r, DIR_ITER *dirState) {
|
|
//---------------------------------------------------------------------------------
|
|
DIR_STRUCT *dirStruct = (DIR_STRUCT*)dirState->dirStruct;
|
|
dirStruct->current_entry = dirStruct->dir->first;
|
|
return(0);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_dirnext_r(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *st) {
|
|
//---------------------------------------------------------------------------------
|
|
DIR_STRUCT *dirStruct = (DIR_STRUCT*)dirState->dirStruct;
|
|
// RAMDISK_BASE_ENTRY **dirStruct = (RAMDISK_BASE_ENTRY**)dirState->dirStruct;
|
|
|
|
FPRINTF("DirNext");
|
|
|
|
if(dirStruct->current_entry)
|
|
{
|
|
FPRINTF("current_entry = %s",dirStruct->current_entry->name);
|
|
strcpy(filename, dirStruct->current_entry->name);
|
|
if(dirStruct->current_entry->IsDir())
|
|
{
|
|
FPRINTF("IsDir");
|
|
if(st) st->st_mode=S_IFDIR;
|
|
}
|
|
else
|
|
{
|
|
FPRINTF("IsFile");
|
|
if(st) st->st_mode=0;
|
|
}
|
|
dirStruct->current_entry = dirStruct->current_entry->next;
|
|
return(0);
|
|
}
|
|
r->_errno = ENOENT;
|
|
return(-1);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_dirclose_r(struct _reent *r, DIR_ITER *dirState) {
|
|
//---------------------------------------------------------------------------------
|
|
return(0);
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_ftruncate_r(struct _reent *r, int fd, off_t len) {
|
|
//---------------------------------------------------------------------------------
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)fd;
|
|
|
|
if (len < 0)
|
|
{
|
|
// Trying to truncate to a negative size
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
/*
|
|
if ((sizeof(len) > 4) && len > (off_t)FILE_MAX_SIZE)
|
|
{
|
|
// Trying to extend the file beyond what supports
|
|
r->_errno = EFBIG;
|
|
return -1;
|
|
}
|
|
*/
|
|
if (!fileStruct->write)
|
|
{
|
|
// Read-only file
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
if(fileStruct->file->Truncate(len))
|
|
return 0;
|
|
r->_errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
void ramdiskFS_Unmount(const char* mountpoint) {
|
|
//---------------------------------------------------------------------------------
|
|
RAMDISK_PARTITION *partition;
|
|
devoptab_t *devops = (devoptab_t*)GetDeviceOpTab(mountpoint);
|
|
|
|
if (!devops)
|
|
return;
|
|
|
|
// Perform a quick check to make sure we're dealing with a ramdiskFS_ controlled device
|
|
if (devops->open_r != ramdiskFS_devoptab.open_r)
|
|
return;
|
|
|
|
if (RemoveDevice (mountpoint) == -1)
|
|
return;
|
|
|
|
partition = *((RAMDISK_PARTITION **)devops->deviceData);
|
|
if(partition->automount)
|
|
delete partition;
|
|
free (devops);
|
|
}
|
|
extern "C" void ramdiskUnmount(const char *mountpoint) {
|
|
ramdiskFS_Unmount(mountpoint);
|
|
}
|
|
//---------------------------------------------------------------------------------
|
|
int ramdiskFS_Mount(const char *mountpoint, void *handle) {
|
|
//---------------------------------------------------------------------------------
|
|
FPRINTF("Mount %s", mountpoint);
|
|
devoptab_t* devops;
|
|
char* nameCopy;
|
|
RAMDISK_PARTITION** partition;
|
|
char Mountpoint[100];
|
|
char *cptr;
|
|
|
|
strlcpy(Mountpoint, mountpoint, sizeof(Mountpoint));
|
|
int len = strlen(Mountpoint);
|
|
cptr = strchr(Mountpoint, ':');
|
|
if(cptr)
|
|
{
|
|
len = cptr-Mountpoint;
|
|
*++cptr = 0;
|
|
}
|
|
else
|
|
strlcat(Mountpoint, ":", sizeof(Mountpoint));
|
|
ramdiskFS_Unmount(Mountpoint);
|
|
if(handle) ramdiskFS_Unmount(((RAMDISK_PARTITION*)handle)->name);
|
|
|
|
devops = (devoptab_t*)malloc(sizeof(devoptab_t) + sizeof(RAMDISK_PARTITION*) + len + 1);
|
|
if (!devops)
|
|
return false;
|
|
|
|
partition = (RAMDISK_PARTITION**)(devops+1); // Use the space allocated at the end of the devoptab struct
|
|
// for storing the partition
|
|
nameCopy = (char*)( partition+1); // Use the space allocated at the end of the partition struct
|
|
// for storing the name
|
|
|
|
memcpy (devops, &ramdiskFS_devoptab, sizeof(ramdiskFS_devoptab)); // Add an entry for this device to the devoptab table
|
|
|
|
strlcpy (nameCopy, Mountpoint, len + 1);
|
|
devops->name = nameCopy;
|
|
|
|
if(handle)
|
|
{
|
|
*partition = (RAMDISK_PARTITION*)handle;
|
|
(*partition)->Rename(Mountpoint);
|
|
}
|
|
else
|
|
*partition = new RAMDISK_PARTITION(Mountpoint, true);
|
|
devops->deviceData = partition;
|
|
FPRINTF("devops=%p nameCopy=%p(%s) partition=%p", devops, nameCopy, nameCopy, partition);
|
|
|
|
if(AddDevice(devops)<0)
|
|
{
|
|
free(devops);
|
|
return false;
|
|
}
|
|
FPRINTF("mounted");
|
|
|
|
return true;
|
|
|
|
}
|
|
extern "C" int ramdiskMount(const char *mountpoint, void *handle) {
|
|
return ramdiskFS_Mount(mountpoint, handle);
|
|
}
|
|
//---------------------------------------------------------------------------------
|
|
extern "C" void* ramdiskCreate() {
|
|
//---------------------------------------------------------------------------------
|
|
return new RAMDISK_PARTITION("", false);
|
|
}
|
|
//---------------------------------------------------------------------------------
|
|
extern "C" void ramdiskDelete(void* Handle) {
|
|
//---------------------------------------------------------------------------------
|
|
RAMDISK_PARTITION *partition = (RAMDISK_PARTITION*)Handle;
|
|
if(partition->automount==false)
|
|
ramdiskFS_Unmount(partition->name);
|
|
delete partition;
|
|
}
|
|
|