int fflush(FILE *stream);
If stream is a null pointer when calling
This parameter is either a null pointer or is a pointer to a stream opened for writing or update.
If successful, the
Another process has the file locked.
stream is not a valid stream opened for writing.
The file is a regular file and an attempt was made to write at or beyond the offset maximum associated with the corresponding stream.
A signal interrupted the call.
An output error occurred.
Memory could not be allocated for internal buffers.
An attempt is made to write to a full disk.
A device error occurred.
A write to a closed pipe was attempted.
Some varieties of UNIX allow
PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
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PTC MKS Toolkit 10.1 patch 1 Documentation Build 2.