ftruncate Truncates a file to a given length &reftitle.description; boolftruncate resourcestream intsize Takes the filepointer, stream, and truncates the file to length, size. &reftitle.parameters; stream The file pointer. The stream must be open for writing. size The size to truncate to. If size is larger than the file then the file is extended with null bytes. If size is smaller than the file then the file is truncated to that size. &reftitle.returnvalues; &return.success; &reftitle.examples; ]]> &reftitle.notes; The file pointer is not changed. &reftitle.seealso; fopen fseek