// OpenFile opens the named file on the the Volume v.
// The Volume must be mounted before calling OpenFile.
// OpenFile is similar to os.OpenFile in its functioning.
//
// name is the name of the file to be open.
// flags is the access mode of the file.
// perm is the permissions for the opened file.
//
// Returns a File object on success and a os.PathError on failure.
//
// BUG : perm is not used for opening the file.
// NOTE: It is better to use Open, Create etc. instead of using OpenFile directly
func (v *Volume) OpenFile(name string, flags int, perm os.FileMode) (*File, error) {
isDir := false
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
var cfd *C.glfs_fd_t
var err error
if (os.O_CREATE & flags) == os.O_CREATE {
cfd, err = C.glfs_creat(v.fs, cname, C.int(flags), C.mode_t(posixMode(perm)))
} else {
cfd, err = C.glfs_open(v.fs, cname, C.int(flags))
}
// Try to reopen using glfs_opendir if the given path is a directory
if err == syscall.EISDIR {
isDir = true
cfd, err = C.glfs_opendir(v.fs, cname)
}
if cfd == nil {
return nil, &os.PathError{"open", name, err}
}
return &File{name, Fd{cfd}, isDir}, nil
}
// Create creates a file with given name on the the Volume v.
// The Volume must be mounted before calling Create.
// Create is similar to os.Create in its functioning.
//
// name is the name of the file to be create.
//
// Returns a File object on success and a os.PathError on failure.
func (v *Volume) Create(name string) (*File, error) {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
cfd, err := C.glfs_creat(v.fs, cname, C.int(os.O_RDWR|os.O_CREATE|os.O_TRUNC), 0666)
if cfd == nil {
return nil, &os.PathError{"create", name, err}
}
return &File{name, Fd{cfd}, false}, nil
}