VFSNAME

The SQLITE_FCNTL_VFSNAME opcode can be used to obtain the names of all VFSes in the VFS stack. The names of all VFS shims and the final bottom-level VFS are written into memory obtained from sqlite3_malloc() and the result is stored in the char* variable that the fourth parameter of sqlite3_file_control() points to. The caller is responsible for freeing the memory when done. As with all file-control actions, there is no guarantee that this will actually do anything. Callers should initialize the char* variable to a NULL pointer in case this file-control is not implemented. This file-control is intended for diagnostic use only.