Home >Backend Development >C++ >How Can FSCTL_ENUM_USN_DATA Be Used to Efficiently Detect File Changes on an NTFS Volume?
Detecting altered files on an NTFS volume can be challenging, especially for volumes with numerous files and directories. This article explores an efficient approach using the FSCTL_ENUM_USN_DATA API to identify specific changes, including deletions, modifications, and new additions.
FSCTL_ENUM_USN_DATA allows for the enumeration of files on a volume, including their current state and USNs (Update Sequence Numbers). By comparing current USNs with previous values, you can determine whether a file has changed.
The provided sample program in C uses FSCTL_ENUM_USN_DATA to search for files named "test.txt" on the C volume and retrieves information about their changes. It checks for files that match the specified name and provides detailed information about each found file and its parent directory.
FSCTL_ENUM_USN_DATA is a highly efficient and effective method for detecting file changes on an NTFS volume. By using this API with the appropriate data filtering techniques, you can develop a robust file monitoring system that suits your specific requirements.
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