Most of these variables apply only when using formats. See Section 4.11 later in this chapter.
$|
$OUTPUT_AUTOFLUSH
If set to nonzero, forces an fflush(3)
after every write
or print
on the currently selected
output channel.
$%
$FORMAT_PAGE_NUMBER
The current page number of the currently selected output channel.
$=
$FORMAT_LINES_PER_PAGE
The current page length (printable lines) of the currently selected output channel. Default is 60.
$-
$FORMAT_LINES_LEFT
The number of lines left on the page of the currently selected output channel.
$~
$FORMAT_NAME
The name of the current report format for the currently selected output channel. Default is the name of the filehandle.
$^
$FORMAT_TOP_NAME
The name of the current top-of-page format for
the currently selected output channel. Default is the name of
the filehandle with _TOP
appended.
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