mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-07-04 00:46:10 +02:00
894 lines
31 KiB
C++
894 lines
31 KiB
C++
#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/iosupport.h>
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#include <sys/errno.h>
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#include <fcntl.h>
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#include <ogcsys.h>
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#include <new>
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#include "ramdisk.h"
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#define NAMELENMAX 0x80
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#define MAXPATHLEN 0x100
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class RAMDISK_PARTITION;
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class RAMDISK_LINK_ENTRY;
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class RAMDISK_DIR_ENTRY;
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class RAMDISK_FILE_ENTRY;
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class RAMDISK_BASE_ENTRY {
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public:
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RAMDISK_BASE_ENTRY(const char *Name, RAMDISK_DIR_ENTRY *Parent);
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virtual ~RAMDISK_BASE_ENTRY();
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void Rename(const char *Name);
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RAMDISK_LINK_ENTRY *IsLink();
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RAMDISK_DIR_ENTRY *IsDir();
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RAMDISK_FILE_ENTRY *IsFile();
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RAMDISK_PARTITION *GetPartition();
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char *name;
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RAMDISK_DIR_ENTRY *parent;
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RAMDISK_BASE_ENTRY *next;
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};
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class RAMDISK_LINK_ENTRY : public RAMDISK_BASE_ENTRY {
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public:
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RAMDISK_LINK_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent, RAMDISK_BASE_ENTRY *Link);
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RAMDISK_BASE_ENTRY *link;
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};
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class RAMDISK_DIR_ENTRY : public RAMDISK_BASE_ENTRY {
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public:
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RAMDISK_DIR_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent);
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~RAMDISK_DIR_ENTRY();
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RAMDISK_BASE_ENTRY *FindEntry(const char* Path);
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RAMDISK_FILE_ENTRY *CreateFile(const char *Filename);
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RAMDISK_DIR_ENTRY *CreateDir(const char *Filename);
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void RemoveEntry(RAMDISK_BASE_ENTRY *Entry);
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RAMDISK_BASE_ENTRY *first;
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RAMDISK_BASE_ENTRY *last;
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};
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typedef struct {
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RAMDISK_DIR_ENTRY *dir;
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RAMDISK_BASE_ENTRY *current_entry;
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} DIR_STRUCT;
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class RAMDISK_PARTITION : public RAMDISK_DIR_ENTRY {
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public:
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RAMDISK_PARTITION(const char *Mountpoint, bool AutoMount);
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RAMDISK_BASE_ENTRY *FindEntry(const char* Path);
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RAMDISK_DIR_ENTRY *FindPath(const char* Path, const char **Basename=NULL);
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RAMDISK_DIR_ENTRY *cwd;
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bool automount;
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};
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class FILE_DATA {
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public:
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FILE_DATA(size_t Len);
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~FILE_DATA();
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u8 *data;
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size_t len;
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FILE_DATA *next;
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};
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typedef struct {
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RAMDISK_FILE_ENTRY *file;
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bool isLink;
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u32 current_pos;
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bool read;
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bool write;
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} FILE_STRUCT;
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class RAMDISK_FILE_ENTRY : public RAMDISK_BASE_ENTRY {
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public:
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RAMDISK_FILE_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent);
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~RAMDISK_FILE_ENTRY();
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bool Truncate(size_t newLen);
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bool AddCluster(size_t size);
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size_t Read(struct _reent *r, FILE_STRUCT *fileStruct, char *ptr, size_t len);
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size_t Write(struct _reent *r, FILE_STRUCT *fileStruct, const char *ptr, size_t len);
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size_t file_len;
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size_t cluster_len;
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FILE_DATA *first_cluster;
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FILE_DATA *last_cluster;
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};
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RAMDISK_LINK_ENTRY::RAMDISK_LINK_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent, RAMDISK_BASE_ENTRY *Link)
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:
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RAMDISK_BASE_ENTRY(Name, Parent),
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link(Link) {
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}
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RAMDISK_BASE_ENTRY::RAMDISK_BASE_ENTRY(const char *Name, RAMDISK_DIR_ENTRY *Parent)
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:
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name(strdup(Name)),
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parent(Parent),
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next(NULL) {}
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RAMDISK_BASE_ENTRY::~RAMDISK_BASE_ENTRY() {
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free(name);
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if (parent) parent->RemoveEntry(this);
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}
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void RAMDISK_BASE_ENTRY::Rename(const char *Name) {
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free(name);
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name = strdup(Name);
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}
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inline RAMDISK_LINK_ENTRY *RAMDISK_BASE_ENTRY::IsLink() {
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return dynamic_cast<RAMDISK_LINK_ENTRY*>(this);
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}
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inline RAMDISK_DIR_ENTRY *RAMDISK_BASE_ENTRY::IsDir() {
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RAMDISK_LINK_ENTRY *lentry = dynamic_cast<RAMDISK_LINK_ENTRY*>(this);
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return dynamic_cast<RAMDISK_DIR_ENTRY*>(lentry ? lentry->link : this);
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}
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inline RAMDISK_FILE_ENTRY *RAMDISK_BASE_ENTRY::IsFile() {
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RAMDISK_LINK_ENTRY *lentry = dynamic_cast<RAMDISK_LINK_ENTRY*>(this);
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return dynamic_cast<RAMDISK_FILE_ENTRY*>(lentry ? lentry->link : this);
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}
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RAMDISK_PARTITION *RAMDISK_BASE_ENTRY::GetPartition() {
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for (RAMDISK_BASE_ENTRY *entry = this; entry; entry = entry->parent)
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if (entry->parent == NULL)
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return dynamic_cast<RAMDISK_PARTITION *>(entry);
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return NULL;
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}
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RAMDISK_DIR_ENTRY::RAMDISK_DIR_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent)
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:
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RAMDISK_BASE_ENTRY(Name, Parent) {
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RAMDISK_BASE_ENTRY* entry = new RAMDISK_LINK_ENTRY(".", this, this);
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first = entry;
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last = entry;
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if (parent) {
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entry = new RAMDISK_LINK_ENTRY("..", this, parent);
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first->next = entry;
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last = entry;
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}
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}
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RAMDISK_DIR_ENTRY::~RAMDISK_DIR_ENTRY() {
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while (first) {
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first->parent = NULL; // ~RAMDISK_BASE_ENTRY() no calls RemoveEntry()
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RAMDISK_BASE_ENTRY* next = first->next;
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delete first;
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first = next;
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}
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}
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RAMDISK_BASE_ENTRY *RAMDISK_DIR_ENTRY::FindEntry(const char* Path) {
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const char* dirpath = Path;
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const char* cptr;
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while ( dirpath[0] == '/') dirpath++; // move past leading '/'
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if (dirpath[0] == '\0') // this path is found
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return this;
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cptr = strchr(dirpath,'/'); // find next '/'
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if (cptr == NULL)
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cptr = strchr(dirpath,'\0'); // cptr at end
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for (RAMDISK_BASE_ENTRY *curr = first; curr; curr=curr->next) {
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if ( strncmp(curr->name, dirpath, cptr-dirpath) == 0) {
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if (RAMDISK_DIR_ENTRY *dir = curr->IsDir())
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return dir->FindEntry(cptr);
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else
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return curr;
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}
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}
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return NULL;
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}
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RAMDISK_FILE_ENTRY *RAMDISK_DIR_ENTRY::CreateFile(const char *Filename) {
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try {
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RAMDISK_FILE_ENTRY* file = new RAMDISK_FILE_ENTRY(Filename, this);
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if (!first) first = file;
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last->next = file;
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last = file;
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return file;
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} catch (...) {
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return NULL;
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}
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}
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RAMDISK_DIR_ENTRY *RAMDISK_DIR_ENTRY::CreateDir(const char *Filename) {
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try {
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RAMDISK_DIR_ENTRY* dir = new RAMDISK_DIR_ENTRY(Filename, this);
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if (!first) first = dir;
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last->next = dir;
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last = dir;
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return dir;
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} catch (...) {
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return NULL;
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}
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}
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void RAMDISK_DIR_ENTRY::RemoveEntry(RAMDISK_BASE_ENTRY *Entry) {
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RAMDISK_BASE_ENTRY **p_last = NULL;
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for (RAMDISK_BASE_ENTRY **curr = &first; *curr; curr=&((*curr)->next) ) {
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if ( *curr == Entry ) {
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*curr = Entry->next;
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if (Entry->next == NULL) // entry is last
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last = *p_last;
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break;
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}
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p_last = curr;
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}
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}
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RAMDISK_PARTITION::RAMDISK_PARTITION(const char *Mountpoint, bool AutoMount) :
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RAMDISK_DIR_ENTRY(Mountpoint, NULL),
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cwd(this),
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automount(AutoMount) {
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}
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RAMDISK_BASE_ENTRY * RAMDISK_PARTITION::FindEntry(const char* path) {
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char *cptr;
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if ( (cptr=strchr(path,':')) )
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path=cptr+1; //move path past any device names
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if ( strchr(path, ':') != NULL ) {
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// r->_errno = EINVAL;
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return NULL;
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}
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if (*path=='/') // if first character is '/' use absolute root path
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return RAMDISK_DIR_ENTRY::FindEntry(path);
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else // else use current working dir
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return cwd->FindEntry(path);
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}
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RAMDISK_DIR_ENTRY * RAMDISK_PARTITION::FindPath(const char* path, const char **basename) {
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int pathLen = strlen(path);
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char dirfilename[pathLen+1]; // to hold a full path
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const char *cptr = path+pathLen; // find the end...
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const char *filename = NULL; // to hold filename
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while (cptr-->path) { //search till start
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if ((*cptr=='/') || (*cptr==':')) { // split at either / or : (whichever comes first form the end!)
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cptr++;
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strlcpy(dirfilename, path, 1+cptr-path); //copy string up till and including / or :
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filename = cptr; //filename = now remainder of string
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break;
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}
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}
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if (!filename) {
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filename = path; //filename = complete path
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dirfilename[0] = 0; //make directory path ""
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}
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RAMDISK_BASE_ENTRY *entry = FindEntry(dirfilename);
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if (entry) {
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if (basename) *basename = filename;
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return entry->IsDir();
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}
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return NULL;
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}
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FILE_DATA::FILE_DATA(size_t Len) :
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next(NULL) {
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data = new u8[Len];
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len = Len;
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memset(data, 0, len);
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}
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FILE_DATA::~FILE_DATA() {
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delete [] data;
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delete next;
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}
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RAMDISK_FILE_ENTRY::RAMDISK_FILE_ENTRY(const char* Name, RAMDISK_DIR_ENTRY *Parent)
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:
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RAMDISK_BASE_ENTRY(Name, Parent),
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file_len(0),
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cluster_len(0),
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first_cluster(NULL),
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last_cluster(NULL) {}
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RAMDISK_FILE_ENTRY::~RAMDISK_FILE_ENTRY() {
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Truncate(0);
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}
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#define CLUSTER_SIZE 4*1024
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bool RAMDISK_FILE_ENTRY::Truncate(size_t newSize) {
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if (newSize > cluster_len) {
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// Expanding the file over cluster_len
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return AddCluster(newSize - cluster_len);
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} else if (newSize < file_len) {
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// Shrinking the file
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FILE_DATA *prev_cluster = NULL;
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size_t len = 0;
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for (FILE_DATA **p_cluster = &first_cluster; *p_cluster; p_cluster = &(*p_cluster)->next) {
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if (len >= newSize) {
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last_cluster = prev_cluster;
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delete *p_cluster;
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(*p_cluster) = NULL;
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break;
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}
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len += (*p_cluster)->len;
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prev_cluster = *p_cluster;
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}
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}
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file_len = newSize;
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return true;
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}
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bool RAMDISK_FILE_ENTRY::AddCluster(size_t len) {
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if (len < CLUSTER_SIZE)
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len = CLUSTER_SIZE;
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try {
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*(last_cluster ? &last_cluster->next : &first_cluster) = last_cluster = new FILE_DATA(len);
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cluster_len += len;
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return true;
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} catch (...) {
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return false;
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}
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}
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size_t RAMDISK_FILE_ENTRY::Read(struct _reent *r, FILE_STRUCT *fileStruct, char *ptr, size_t len) {
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if (!fileStruct->read) {
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r->_errno = EBADF;
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return 0;
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}
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// Short circuit cases where len is 0 (or less)
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if (len <= 0)
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return 0;
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// Don't try to read if the read pointer is past the end of file
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if (fileStruct->current_pos >= file_len) {
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r->_errno = EOVERFLOW;
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return 0;
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}
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// Don't read past end of file
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if (len + fileStruct->current_pos > file_len) {
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r->_errno = EOVERFLOW;
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len = fileStruct->current_pos - file_len;
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}
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off_t pos = fileStruct->current_pos;
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size_t readed = 0;
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size_t max_len = file_len;
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for (FILE_DATA *cluster = first_cluster; cluster; cluster = cluster->next) {
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if (pos > cluster->len) {
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pos -= cluster->len;
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max_len -= cluster->len;
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} else {
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size_t read = max_len;
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if (read > cluster->len)
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read = cluster->len;
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read -= pos;
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if (read > len)
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read = len;
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memcpy(ptr, &(cluster->data[pos]), read);
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readed += read;
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ptr += read;
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len -= read;
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if (len == 0)
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break;
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pos -= cluster->len;
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max_len -= cluster->len;
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}
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}
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fileStruct->current_pos += readed;
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return readed;
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}
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size_t RAMDISK_FILE_ENTRY::Write(struct _reent *r, FILE_STRUCT *fileStruct, const char *ptr, size_t len) {
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if (!fileStruct->write) {
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r->_errno = EBADF;
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return 0;
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}
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// Short circuit cases where len is 0 (or less)
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if (len <= 0)
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return 0;
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off_t pos = fileStruct->current_pos;
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if (cluster_len < (pos+len) && !AddCluster((pos+len) - cluster_len)) {
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// Couldn't get a cluster, so abort
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r->_errno = ENOSPC;
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return 0;
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}
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if (file_len < (pos+len))
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file_len = (pos+len);
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size_t written = 0;
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size_t max_len = cluster_len;
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for (FILE_DATA *cluster = first_cluster; cluster; cluster = cluster->next) {
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if (pos > cluster->len) {
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pos -= cluster->len;
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max_len -= cluster->len;
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} else {
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size_t write = cluster->len - pos;
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if (write > len) write = len;
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memcpy(&(cluster->data[pos]), ptr, write);
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written += write;
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ptr += write;
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len -= write;
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if (len == 0)
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break;
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pos -= cluster->len;
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max_len -= cluster->len;
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}
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}
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fileStruct->current_pos += written;
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return written;
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}
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static int ramdiskFS_open_r(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
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static int ramdiskFS_close_r(struct _reent *r, int fd);
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static int ramdiskFS_write_r(struct _reent *r, int fd, const char *ptr, size_t len);
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static int ramdiskFS_read_r(struct _reent *r, int fd, char *ptr, size_t len);
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static off_t ramdiskFS_seek_r(struct _reent *r, int fd, off_t pos, int dir);
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static int ramdiskFS_fstat_r(struct _reent *r, int fd, struct stat *st);
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static int ramdiskFS_stat_r(struct _reent *r, const char *file, struct stat *st);
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static int ramdiskFS_unlink_r(struct _reent *r, const char *name);
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static int ramdiskFS_chdir_r(struct _reent *r, const char *name);
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static int ramdiskFS_mkdir_r(struct _reent *r, const char *path, int mode);
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static DIR_ITER* ramdiskFS_diropen_r(struct _reent *r, DIR_ITER *dirState, const char *path);
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static int ramdiskFS_dirreset_r(struct _reent *r, DIR_ITER *dirState);
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static int ramdiskFS_dirnext_r(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *st);
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static int ramdiskFS_dirclose_r(struct _reent *r, DIR_ITER *dirState);
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static int ramdiskFS_ftruncate_r(struct _reent *r, int fd, off_t len);
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static devoptab_t ramdiskFS_devoptab={
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"ramdisk",
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sizeof(FILE_STRUCT), // int structSize;
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&ramdiskFS_open_r, // int (*open_r)(struct _reent *r, void *fileStruct, const char *path,int
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// flags,int mode);
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&ramdiskFS_close_r, // int (*close_r)(struct _reent *r, int fd);
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&ramdiskFS_write_r, // int (*write_r)(struct _reent *r, int fd, const char *ptr, int len);
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&ramdiskFS_read_r, // int (*read_r)(struct _reent *r, int fd, char *ptr, int len);
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&ramdiskFS_seek_r, // off_t (*seek_r)(struct _reent *r, off_t fd, int pos, int dir);
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&ramdiskFS_fstat_r, // int (*fstat_r)(struct _reent *r, int fd, struct stat *st);
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&ramdiskFS_stat_r, // int (*stat_r)(struct _reent *r, const char *file, struct stat *st);
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NULL, // int (*link_r)(struct _reent *r, const char *existing, const char *newLink);
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&ramdiskFS_unlink_r, // int (*unlink_r)(struct _reent *r, const char *name);
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&ramdiskFS_chdir_r, // int (*chdir_r)(struct _reent *r, const char *name);
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NULL, // int (*rename_r) (struct _reent *r, const char *oldName, const char *newName);
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ramdiskFS_mkdir_r, // int (*mkdir_r) (struct _reent *r, const char *path, int mode);
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sizeof(DIR_STRUCT), // int dirStateSize;
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&ramdiskFS_diropen_r, // DIR_ITER* (*diropen_r)(struct _reent *r, DIR_ITER *dirState, const char *path);
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&ramdiskFS_dirreset_r, // int (*dirreset_r)(struct _reent *r, DIR_ITER *dirState);
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&ramdiskFS_dirnext_r, // int (*dirnext_r)(struct _reent *r, DIR_ITER *dirState, char *filename,
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// struct stat *filestat);
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&ramdiskFS_dirclose_r, // int (*dirclose_r)(struct _reent *r, DIR_ITER *dirState);
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NULL, // statvfs_r
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&ramdiskFS_ftruncate_r, // int (*ftruncate_r)(struct _reent *r, int fd, off_t len);
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NULL, // fsync_r,
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NULL // Device data
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};
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//---------------------------------------------------------------------------------
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static inline RAMDISK_PARTITION* ramdiskFS_getPartitionFromPath(const char* path) {
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//---------------------------------------------------------------------------------
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const devoptab_t *devops = GetDeviceOpTab(path);
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if (!devops)
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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) {
|
|
//---------------------------------------------------------------------------------
|
|
FILE_STRUCT *fileStruct = (FILE_STRUCT*)file_Struct;
|
|
|
|
|
|
RAMDISK_PARTITION *partition = ramdiskFS_getPartitionFromPath(path);
|
|
if ( partition == NULL ) {
|
|
r->_errno = ENODEV;
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
// It should not be a directory if we're openning a file,
|
|
if (entry && entry->IsDir()) {
|
|
r->_errno = EISDIR;
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
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;
|
|
}
|
|
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;
|
|
|
|
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) {
|
|
//---------------------------------------------------------------------------------
|
|
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) {
|
|
//---------------------------------------------------------------------------------
|
|
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) {
|
|
//---------------------------------------------------------------------------------
|
|
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) {
|
|
//---------------------------------------------------------------------------------
|
|
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);
|
|
return 0;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------------
|
|
static int ramdiskFS_mkdir_r(struct _reent *r, const char *path, int mode) {
|
|
//---------------------------------------------------------------------------------
|
|
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) {
|
|
//---------------------------------------------------------------------------------
|
|
|
|
DIR_STRUCT *dirStruct = (DIR_STRUCT*)dirState->dirStruct;
|
|
char *cptr;
|
|
|
|
RAMDISK_PARTITION *partition = ramdiskFS_getPartitionFromPath(path);
|
|
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);
|
|
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;
|
|
|
|
if (dirStruct->current_entry) {
|
|
strcpy(filename, dirStruct->current_entry->name);
|
|
if (dirStruct->current_entry->IsDir()) {
|
|
if (st) st->st_mode=S_IFDIR;
|
|
} else {
|
|
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) {
|
|
//---------------------------------------------------------------------------------
|
|
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;
|
|
|
|
if (AddDevice(devops)<0) {
|
|
free(devops);
|
|
return false;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|