Library /sys$common/syshlp/helplib.hlb  —  CRTL  setvbuf
    Associates a buffer with an input or output file and potentially
    modifies the buffering behavior.

    Format

      #include  <stdio.h>

      int setvbuf  (FILE *file_ptr, char *buffer, int type, size_t size);
Additional Information: explode extract
Arguments Description Return Values
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