openfiles

Openfiles is a command-line utility used to view and manage files that are currently open on a local computer or across a network. It is part of Windows’ administrative tooling for handling open file locks and sessions, and is commonly employed by system administrators during maintenance or troubleshooting to determine which processes hold locks on specific files.

Functionality of openfiles includes enumerating open file handles and presenting details such as the file path, the process that has it open, and the user associated with the session. In many implementations, the tool also provides a way to disconnect or close open file handles to release a lock, enabling operations such as moving, deleting, or updating files that are otherwise in use.

Usage typically involves invoking the utility from the command line with options to query currently open files or to disconnect selected handles. The exact syntax and available options can vary by Windows version, so users should consult version-specific documentation. Administrators should exercise caution when disconnecting handles, as closing a file on behalf of a user can interrupt ongoing work.

Limitations of openfiles include that it may not show all types of file handles and that remote usage requires appropriate privileges and network sharing permissions. It is one of several tools used for handle management; alternatives and complementary utilities include the Sysinternals Handle tool and, on Unix-like systems, lsof.

See also: lsof, handle, Sysinternals Handle, Windows file sharing, SMB.