profuse/profuse_dirent.cpp

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/*
* profuse_dirent.cpp
* profuse
*
* Created by Kelvin Sherlock on 1/23/2009.
*
*/
#include "profuse.h"
#include <errno.h>
#include <strings.h>
#include <algorithm>
#include <string>
#include <vector>
using std::string;
using std::vector;
#pragma mark Directory Functions
/*
* when the directory is opened, we load the volume/directory and store the FileEntry vector into
* fi->fh.
*
*/
void prodos_opendir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
{
fprintf(stderr, "opendir: %u\n", (unsigned)ino);
// verify it's a directory/volume here?
uint8_t buffer[BLOCK_SIZE];
vector<FileEntry> files;
bool ok;
ok = disk->Read(ino == 1 ? 2 : ino >> 9, buffer);
ERROR(ok < 0, EIO)
if (ino == 1)
{
VolumeEntry v;
v.Load(buffer + 0x04);
ok = disk->ReadVolume(&v, &files);
ERROR(ok < 0, EIO)
}
else
{
FileEntry e;
e.Load(buffer + (ino & 0x1ff));
ERROR(e.storage_type != DIRECTORY_FILE, ENOTDIR)
ok = disk->ReadDirectory(e.key_pointer, NULL, &files);
ERROR(ok < 0, EIO);
}
// copy the vector contents to a vector *.
vector<FileEntry> *fp = new vector<FileEntry>();
files.swap(*fp);
fi->fh = (uint64_t)fp;
fuse_reply_open(req, fi);
}
void prodos_releasedir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
{
fprintf(stderr,"releasedir: %u\n", (unsigned)ino);
vector<FileEntry> *files = (vector<FileEntry> *)fi->fh;
if (files) delete files;
fuse_reply_err(req, 0);
}
void prodos_readdir(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, struct fuse_file_info *fi)
{
vector<FileEntry> *files = (vector<FileEntry> *)fi->fh;
struct stat st;
fprintf(stderr, "readdir %u %u %u\n", (unsigned)ino, (unsigned)size, (unsigned)off);
// TODO -- add "." and ".." entries...
// if the offset >= number of entries, get out.
if (!files || files->size() <= off)
{
fprintf(stderr, "fuse_reply_buf(req, NULL, 0)\n");
fuse_reply_buf(req, NULL, 0);
return;
}
// now some dirent info...
bzero(&st, sizeof(st));
// only mode and ino are used.
char *buffer = new char[size];
unsigned count = files->size();
unsigned current_size = 0;
for (unsigned i = off; i < count; ++i)
{
FileEntry &f = (*files)[i];
st.st_mode = f.storage_type == DIRECTORY_FILE ? S_IFDIR | 0555 : S_IFREG | 0444;
st.st_ino = f.address;
unsigned entry_size = fuse_add_direntry(req, NULL, 0, f.file_name, NULL, 0);
if (entry_size + current_size >= size) break;
fuse_add_direntry(req, (char *)buffer + current_size, size, f.file_name, &st, i + 1);
current_size += entry_size;
}
fuse_reply_buf(req, buffer, current_size);
delete []buffer;
}