[#BloombergLP-bdls-FdStreamBuf-sync]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdls.adoc[bdls]::xref:BloombergLP/bdls/FdStreamBuf.adoc[FdStreamBuf]::sync
:relfileprefix: ../../../
:mrdocs:

If in output mode, flush the buffer to the associated file descriptor; otherwise do nothing. Return 0 on success, ‐1 otherwise.

== Synopsis

Declared in `<bdls_fdstreambuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
int
sync() override;
----


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