HELPLIB.HLB  —  CRTL  Feature Logical Names, DECC$POPEN_NO_CRLF_REC_ATTR
    With DECC$POPEN_NO_CRLF_REC_ATTR disabled, a pipe opened with the
    popen function has its record attributes set to CR/LF carriage
    control (fab$b_rat |= FAB$M_CR). This is the default behavior.

    With DECC$POPEN_NO_CRLF_REC_ATTR enabled, CR/LF carriage control
    is prevented from being added to the pipe records. This is
    compatible with UNIX behavior, but be aware that enabling this
    feature might result in undesired behavior from other functions,
    such as gets, that rely on the carriage-return character.
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