Library /sys$common/syshlp/helplib.hlb  —  CRTL  strncat  Arguments
 str_1, str_2

    Pointers to null-terminated character strings.

 maxchar

    The number of characters to concatenate from str_2, unless
    strncat first encounters a null terminator in str_2. If maxchar
    is 0, no characters are copied from str_2.
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