hp.1 (2010 09)

h
hp(1) hp(1)
NAME
hp - handle special functions of HP 2640 and HP 2621-series terminals
SYNOPSIS
hp [-e][-m]
DESCRIPTION
hp supports special functions of the Hewlett-Packard
HP 2640 and HP
2621 series of terminals, with the
primary purpose of producing accurate representations of most
nroff output. A typical use is:
nroff -h files ... |hp
Regardless of the hardware options on a given terminal,
hp tries to do sensible things with underlining
and reverse line-feeds. If the terminal has the ‘‘display enhancements’’ feature, subscripts and super-
scripts can be indicated in distinct ways. If it has the ‘‘mathematical-symbol’’ feature, Greek and other
special characters can be displayed.
Options
hp recognizes the following options:
-e Specify that your terminal has the ‘‘display enhancements’’ feature, to make maximal use
of the added display modes. Overstruck characters are presented in the Underline mode.
Superscripts are shown in Half-bright mode, and subscripts in Half-bright, Underlined
mode. If this flag is omitted, hp assumes that your terminal lacks the ‘‘display enhance-
ments’’ feature. In this case, all overstruck characters, subscripts, and superscripts are
displayed in Inverse Video mode; that is, dark-on-light, rather than light-on-dark.
-m Request minimization of output by removing new-lines. Any contiguous sequence of 3 or
more new-lines is converted into a sequence of only 2 new-lines; that is, any number of
successive blank lines produces only a single blank output line. This allows you to retain
more actual text on the screen.
DIAGNOSTICS
line too long
The representation of a line exceeds 1,024 characters.
RETURN VALUE
hp returns zero for normal termination, and 2 for all errors.
WARNINGS
An ‘‘overstriking sequence’’ is defined as a printing character followed by a backspace followed by another
printing character. In such sequences, if either printing character is an underscore, the other printing
character is shown underlined or in Inverse Video; otherwise, only the first printing character is shown
(again, underlined or in Inverse Video). Nothing special is done if a backspace is adjacent to an
ASCII
control character. Sequences of control characters (e.g., reverse line-feeds, backspaces) can make text
‘‘disappear’’; in particular, tables generated by tbl that contain vertical lines will often be missing the
lines of text that contain the ‘‘foot’’ of a vertical line, unless the input to hp is piped through col (see
col(1)).
Although some terminals do support numerical superscript characters, no attempt is made to display
them.
SEE ALSO
col(1), neqn(1), nroff(1), tbl(1).
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1