#include <ufas.h> stat = u_uclose( fp[, option ] )
"u_uclose" causes a Unit Close to occur on the given unit. The unit remains open for further I/O.
The following values are allowed for the option value:
U_RWUN - Rewind Unit U_NRUN - Don't Rewind Unit U_RLUN - Rewind and Lock Unit U_RUUN - Rewind and Unload Unit
The status return will only occur if error-handling has been specified in the call to "u_open".
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