Library /sys$common/syshlp/helplib.hlb  —  CRTL  strncpy  Description
    The strncpy function copies no more than maxchar characters from
    source to dest, up to but not including the null terminator of
    source. If source contains less than maxchar characters, dest
    is padded with null characters. If source contains greater than
    or equal to maxchar characters, as many characters as possible
    are copied to dest. Be aware that the dest argument might not be
    terminated by a null character after a call to strncpy.
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