void ext2CloseFile (ext2_file_state *file)
{
// Sanity check
if (!file || !file->vd)
return;
ext2fs_file_close(file->fd);
// Sync the file (and its attributes) to disc
if(file->write)
ext2UpdateTimes(file->vd, file->ni, EXT2_UPDATE_ACTIME);
if (file->read)
ext2UpdateTimes(file->vd, file->ni, EXT2_UPDATE_ATIME);
ext2Sync(file->vd, file->ni);
// Close the file (if open)
if (file->ni)
ext2CloseEntry(file->vd, file->ni);
// Reset the file state
file->ni = NULL;
file->fd = NULL;
file->flags = 0;
file->read = false;
file->write = false;
file->append = false;
return;
}
int ext2_dirreset_r (struct _reent *r, DIR_ITER *dirState)
{
ext2_log_trace("dirState %p\n", dirState);
if(!dirState)
{
r->_errno = EINVAL;
return -1;
}
ext2_dir_state* dir = STATE(dirState);
// Sanity check
if (!dir || !dir->vd || !dir->ni) {
r->_errno = EBADF;
return -1;
}
// Lock
ext2Lock(dir->vd);
// Move to the first entry in the directory
dir->current = dir->first;
// Update directory times
ext2UpdateTimes(dir->vd, dir->ni, EXT2_UPDATE_ATIME);
// Unlock
ext2Unlock(dir->vd);
return 0;
}
int ext2_dirnext_r (struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat)
{
ext2_log_trace("dirState %p, filename %p, filestat %p\n", dirState, filename, filestat);
if(!dirState)
{
r->_errno = EINVAL;
return -1;
}
ext2_dir_state* dir = STATE(dirState);
ext2_inode_t *ni = NULL;
// Sanity check
if (!dir || !dir->vd || !dir->ni) {
r->_errno = EBADF;
return -1;
}
// Lock
ext2Lock(dir->vd);
// Check that there is a entry waiting to be fetched
if (!dir->current) {
ext2Unlock(dir->vd);
r->_errno = ENOENT;
return -1;
}
// Fetch the current entry
strcpy(filename, dir->current->name);
if(filestat != NULL)
{
if(strcmp(dir->current->name, ".") == 0 || strcmp(dir->current->name, "..") == 0)
{
memset(filestat, 0, sizeof(struct stat));
filestat->st_mode = S_IFDIR;
}
else
{
ni = ext2OpenEntry(dir->vd, dir->current->name);
if (ni) {
ext2Stat(dir->vd, ni, filestat);
ext2CloseEntry(dir->vd, ni);
}
}
}
// Move to the next entry in the directory
dir->current = dir->current->next;
// Update directory times
ext2UpdateTimes(dir->vd, dir->ni, EXT2_UPDATE_ATIME);
// Unlock
ext2Unlock(dir->vd);
return 0;
}
int ext2_ftruncate_r (struct _reent *r, int fd, off_t len)
{
ext2_log_trace("fd %p, len %Li\n", (void *) fd, len);
ext2_file_state* file = STATE(fd);
errcode_t err = 0;
// Sanity check
if (!file || !file->vd || !file->ni || !file->fd) {
r->_errno = EINVAL;
return -1;
}
// Lock
ext2Lock(file->vd);
// Check that we are allowed to write to this file
if (!file->write) {
ext2Unlock(file->vd);
r->_errno = EACCES;
return -1;
}
err = ext2fs_file_set_size2(file->fd, len);
// Sync the file (and its attributes) to disc
if(!err)
ext2Sync(file->vd, file->ni);
// update times
ext2UpdateTimes(file->vd, file->ni, EXT2_UPDATE_AMTIME);
// Unlock
ext2Unlock(file->vd);
return err;
}
int ext2_open_r (struct _reent *r, void *fileStruct, const char *path, int flags, int mode)
{
//ext2_log_trace("fileStruct %p, path %s, flags %i, mode %i\n", fileStruct, path, flags, mode);
ext2_file_state* file = STATE(fileStruct);
// Get the volume descriptor for this path
file->vd = ext2GetVolume(path);
if (!file->vd) {
r->_errno = ENODEV;
return -1;
}
// Lock
ext2Lock(file->vd);
// Determine which mode the file is opened for
file->flags = flags;
if ((flags & 0x03) == O_RDONLY) {
file->read = true;
file->write = false;
file->append = false;
} else if ((flags & 0x03) == O_WRONLY) {
file->read = false;
file->write = true;
file->append = (flags & O_APPEND);
} else if ((flags & 0x03) == O_RDWR) {
file->read = true;
file->write = true;
file->append = (flags & O_APPEND);
} else {
r->_errno = EACCES;
ext2Unlock(file->vd);
return -1;
}
// Try and find the file and (if found) ensure that it is not a directory
file->ni = ext2OpenEntry(file->vd, path);
if (file->ni && LINUX_S_ISDIR(file->ni->ni.i_mode))
{
ext2CloseEntry(file->vd, file->ni);
ext2Unlock(file->vd);
r->_errno = EISDIR;
return -1;
}
// Are we creating this file?
if ((flags & O_CREAT) && !file->ni)
// Create the file
file->ni = ext2Create(file->vd, path, S_IFREG, NULL);
// exit(0);
// Sanity check, the file should be open by now
if (!file->ni) {
ext2Unlock(file->vd);
r->_errno = ENOENT;
return -1;
}
// Make sure we aren't trying to write to a read-only file
if (!(file->vd->fs->flags & EXT2_FLAG_RW) && file->write)
{
ext2CloseEntry(file->vd, file->ni);
ext2Unlock(file->vd);
r->_errno = EROFS;
return -1;
}
errcode_t err = ext2fs_file_open2(file->vd->fs, file->ni->ino, &file->ni->ni,
file->write ? EXT2_FLAG_RW : 0, &file->fd);
if(err != 0)
{
ext2CloseEntry(file->vd, file->ni);
ext2Unlock(file->vd);
r->_errno = ENOENT;
return -1;
}
// Truncate the file if requested
if ((flags & O_TRUNC) && file->write) {
if (ext2fs_file_set_size2(file->fd, 0) != 0) {
ext2CloseEntry(file->vd, file->ni);
ext2Unlock(file->vd);
r->_errno = errno;
return -1;
}
file->ni->ni.i_size = file->ni->ni.i_size_high = 0;
}
// Set the files current position
ext2fs_file_llseek(file->fd, file->append ? EXT2_I_SIZE(&file->ni->ni) : 0, SEEK_SET, 0);
//ext2_log_trace("file->len %lld\n", EXT2_I_SIZE(&file->ni->ni));
// Update file times
ext2UpdateTimes(file->vd, file->ni, EXT2_UPDATE_ATIME);
// Insert the file into the double-linked FILO list of open files
if (file->vd->firstOpenFile) {
file->nextOpenFile = file->vd->firstOpenFile;
file->vd->firstOpenFile->prevOpenFile = file;
} else {
file->nextOpenFile = NULL;
}
file->prevOpenFile = NULL;
file->vd->firstOpenFile = file;
file->vd->openFileCount++;
// Sync access time
ext2Sync(file->vd, file->ni);
file->is_ntfs = 0;
// Unlock
ext2Unlock(file->vd);
return (int)(s64)fileStruct;
}
int ext2_file_to_sectors (struct _reent *r,const char *path,uint32_t *sec_out,uint32_t *size_out,int max,int phys)
{
ntfs_file_state fileStruct;
ext2_file_state* file = STATE(&fileStruct);
// Get the volume descriptor for this path
file->vd = ext2GetVolume(path);
if (!file->vd) {
r->_errno = ENODEV;
return -1;
}
// Lock
ext2Lock(file->vd);
file->flags = 0;
file->read = true;
file->write = false;
file->append = false;
// Try and find the file and (if found) ensure that it is not a directory
file->ni = ext2OpenEntry(file->vd, path);
if (file->ni && LINUX_S_ISDIR(file->ni->ni.i_mode))
{
ext2CloseEntry(file->vd, file->ni);
ext2Unlock(file->vd);
r->_errno = EISDIR;
return -1;
}
// Sanity check, the file should be open by now
if (!file->ni) {
ext2Unlock(file->vd);
r->_errno = ENOENT;
return -1;
}
errcode_t err = ext2fs_file_open2(file->vd->fs, file->ni->ino, &file->ni->ni,
0, &file->fd);
if(err != 0)
{
ext2CloseEntry(file->vd, file->ni);
ext2Unlock(file->vd);
r->_errno = ENOENT;
return -1;
}
//ext2_log_trace("file->len %lld\n", EXT2_I_SIZE(&file->ni->ni));
// Update file times
ext2UpdateTimes(file->vd, file->ni, EXT2_UPDATE_ATIME);
// Insert the file into the double-linked FILO list of open files
if (file->vd->firstOpenFile) {
file->nextOpenFile = file->vd->firstOpenFile;
file->vd->firstOpenFile->prevOpenFile = file;
} else {
file->nextOpenFile = NULL;
}
file->prevOpenFile = NULL;
file->vd->firstOpenFile = file;
file->vd->openFileCount++;
// Sync access time
ext2Sync(file->vd, file->ni);
file->is_ntfs = 0;
u64 read = 0;
err = 0;
// Read from the files data attribute
//err = ext2fs_file_read(file->fd, ptr, len, &read);
u64 len = 0;
ext2fs_file_llseek(file->fd, 0, SEEK_END, (__u64 *) &len);
// Set the files current position
ext2fs_file_llseek(file->fd, 0, SEEK_SET, 0);
u32 current_block = 0;
err = ext2fs_file_read_sectors(file->fd, len, &read, sec_out, size_out, ¤t_block, max);
if (err || read <= 0 || read > len) {
ext2Unlock(file->vd);
r->_errno = errno;
current_block = err ? err : -1;
goto end;
}
end:
// Close the file
ext2CloseFile(file);
// Remove the file from the double-linked FILO list of open files
file->vd->openFileCount--;
if (file->nextOpenFile)
file->nextOpenFile->prevOpenFile = file->prevOpenFile;
if (file->prevOpenFile)
file->prevOpenFile->nextOpenFile = file->nextOpenFile;
else
file->vd->firstOpenFile = file->nextOpenFile;
ext2Unlock(file->vd);
return current_block;
}
DIR_ITER *ext2_diropen_r (struct _reent *r, DIR_ITER *dirState, const char *path)
{
ext2_log_trace("dirState %p, path %s\n", dirState, path);
if(!dirState)
{
r->_errno = EINVAL;
return NULL;
}
ext2_dir_state* dir = STATE(dirState);
if(!dir)
{
r->_errno = EINVAL;
return NULL;
}
// Get the volume descriptor for this path
dir->vd = ext2GetVolume(path);
if (!dir->vd) {
r->_errno = ENODEV;
return NULL;
}
// Lock
ext2Lock(dir->vd);
// Find the directory
dir->ni = ext2OpenEntry(dir->vd, path);
if (!dir->ni) {
ext2Unlock(dir->vd);
r->_errno = ENOENT;
return NULL;
}
// Ensure that this directory is indeed a directory
if (!LINUX_S_ISDIR(dir->ni->ni.i_mode)) {
ext2CloseEntry(dir->vd, dir->ni);
ext2Unlock(dir->vd);
r->_errno = ENOTDIR;
return NULL;
}
// Read the directory
dir->first = dir->current = NULL;
if (ext2fs_dir_iterate(dir->vd->fs, dir->ni->ino, 0, 0, DirIterateCallback, dirState) != EXT2_ET_OK) {
ext2CloseDir(dir);
ext2Unlock(dir->vd);
r->_errno = errno;
return NULL;
}
// Move to the first entry in the directory
dir->current = dir->first;
// Update directory times
ext2UpdateTimes(dir->vd, dir->ni, EXT2_UPDATE_ATIME);
// Insert the directory into the double-linked FILO list of open directories
if (dir->vd->firstOpenDir) {
dir->nextOpenDir = dir->vd->firstOpenDir;
dir->vd->firstOpenDir->prevOpenDir = dir;
} else {
dir->nextOpenDir = NULL;
}
dir->prevOpenDir = NULL;
dir->vd->cwd_ni = dir->ni;
dir->vd->firstOpenDir = dir;
dir->vd->openDirCount++;
// Unlock
ext2Unlock(dir->vd);
return dirState;
}
int ext2Link(ext2_vd *vd, const char *old_path, const char *new_path)
{
ext2_inode_t *dir_ni = NULL, *ni = NULL;
char *dir = NULL;
char *name = NULL;
errcode_t err = 0;
// Sanity check
if (!vd || !vd->fs) {
errno = ENODEV;
return -1;
}
if(!(vd->fs->flags & EXT2_FLAG_RW)) {
errno = EACCES;
return -1;
}
// You cannot link between devices
if(vd != ext2GetVolume(new_path)) {
errno = EXDEV;
return -1;
}
// Get the actual paths of the entry
old_path = ext2RealPath(old_path);
new_path = ext2RealPath(new_path);
if (!old_path || !new_path)
return -1;
// Lock
ext2Lock(vd);
//check for existing in new path
ni = ext2OpenEntry(vd, new_path);
if (ni) {
errno = EEXIST;
goto cleanup;
}
dir = strdup(new_path);
if (!dir) {
errno = ENOMEM;
err = -1;
goto cleanup;
}
char * ptr = strrchr(dir, '/');
if (ptr)
{
name = strdup(ptr+1);
*ptr = 0;
}
else
name = strdup(dir);
// Find the entry
ni = ext2OpenEntry(vd, old_path);
if (!ni) {
err = -1;
goto cleanup;
}
// Open the entries new parent directory
dir_ni = ext2OpenEntry(vd, dir);
if (!dir_ni) {
err = -1;
goto cleanup;
}
do
{
// Link the entry to its new parent
err = ext2fs_link(vd->fs, dir_ni->ino, name, ni->ino, ext2_file_type(ni->ni.i_mode));
if (err == EXT2_ET_DIR_NO_SPACE)
{
if (ext2fs_expand_dir(vd->fs, dir_ni->ino) != 0)
goto cleanup;
}
else if(err != EXT2_ET_OK)
{
errno = EMLINK;
goto cleanup;
}
}
while(err == EXT2_ET_DIR_NO_SPACE);
ni->ni.i_links_count++;
// Update entry times
ext2UpdateTimes(vd, ni, EXT2_UPDATE_MCTIME);
// Sync the entry to disc
ext2Sync(vd, ni);
cleanup:
if(dir_ni)
ext2CloseEntry(vd, dir_ni);
if(ni)
ext2CloseEntry(vd, ni);
if(dir)
mem_free(dir);
if(name)
mem_free(name);
// Unlock
ext2Unlock(vd);
return err;
}