[#BloombergLP-bdls-FilesystemUtil_TransitionalUnixImpUtil-FileDescriptor]
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`FileDescriptor` is an alias for the operating system's native file descriptor / file handle type.

== Synopsis

Declared in `<bdls_filesystemutil_transitionaluniximputil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int FileDescriptor;
----


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