/*
* Get file attributes.
*
* Similar to stat(). The 'st_dev' and 'st_blksize' fields are ignored. The
* 'st_ino' field is ignored except if the 'use_ino' mount option is given.
*/
int tagfs_getattr(const char *path, struct stat *statbuf) {
char *file_location = NULL;
int file_id = 0;
int retstat = 0;
DEBUG(ENTRY);
INFO("Retrieving attributes for %s", path);
if (valid_path_to_file(path)) {
file_id = file_id_from_path(path);
file_location = get_file_location(file_id);
/* read information from actual file */
retstat = stat(file_location, statbuf);
if(retstat < 0) {
WARN("Reading information from file %s failed", file_location);
delete_file(file_id);
}
free_single_ptr((void **)&file_location);
}
else if(valid_path_to_folder(path)) {
statbuf->st_mode = S_IFDIR | 0755; /* TODO: Set hard links, etc. */
}
else {
retstat = -ENOENT;
}
DEBUG(EXIT);
return retstat;
} /* tagfs_getattr */
/*
* File open operation
*
* No creation (O_CREAT, O_EXCL) and by default also no truncation (O_TRUNC)
* flags will be passed to open(). If an application specifies O_TRUNC,
* fuse first calls truncate() and then open(). Only if 'atomic_o_trunc' has
* been specified and kernel version is 2.6.24 or later, O_TRUNC is passed on
* to open.
*
* Unless the 'default_permissions' mount option is given, open should check if
* the operation is permitted for the given flags. Optionally open may also
* return an arbitrary filehandle in the fuse_file_info structure, which will
* be passed to all file operations.
*
* Changed in version 2.2
*/
int tagfs_open(const char *path, struct fuse_file_info *fi) {
char *file_location = NULL;
int fd = 0;
int file_id = 0;
int retstat = 0;
DEBUG(ENTRY);
INFO("Opening file: %s", path);
file_id = file_id_from_path(path);
file_location = get_file_location(file_id);
fd = open(file_location, fi->flags);
if(fd < 0) {
WARN("Opening file %s failed", file_location);
retstat = -errno;
}
free_single_ptr((void **)&file_location);
fi->fh = fd;
DEBUG(EXIT);
return retstat;
}
/*
* Read data from an open file
*
* Read should return exactly the number of bytes requested except on EOF or
* error, otherwise the rest of the data will be substituted with zeroes. An
* exception to this is when the 'direct_io' mount option is specified, in
* which case the return value of the read system call will reflect the return
* value of this operation.
*
* Changed in version 2.2
*/
int tagfs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) {
char *file_location = NULL;
int fd = 0;
int file_id = 0;
int retstat = 0;
DEBUG(ENTRY);
INFO("Reading %s", path);
file_id = file_id_from_path(path);
file_location = get_file_location(file_id);
fd = open(file_location, O_RDONLY);
free_single_ptr((void **)&file_location);
retstat = pread(fd, buf, size, offset);
DEBUG(EXIT);
return retstat;
}
/* Make a file spec for an LWFN file from a FOND resource and
a file name. */
static FT_Error
make_lwfn_spec( Handle fond,
unsigned char* file_name,
FSSpec* spec )
{
FT_Error error;
short ref_num, v_ref_num;
long dir_id;
Str255 fond_file_name;
ref_num = HomeResFile( fond );
error = ResError();
if ( !error )
error = get_file_location( ref_num, &v_ref_num,
&dir_id, fond_file_name );
if ( !error )
error = FSMakeFSSpec( v_ref_num, dir_id, file_name, spec );
return error;
}
