.\"	$NetBSD: terminfo.3,v 1.14 2017/10/22 16:42:34 abhinav Exp $
.\"
.\" Copyright (c) 2009, 2011 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Roy Marples.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd November 23, 2015
.Dt TERMINFO 3
.Os
.Sh NAME
.Nm setupterm ,
.Nm set_curterm ,
.Nm del_curterm ,
.Nm termname ,
.Nm longname ,
.Nm tigetflag ,
.Nm tigetnum ,
.Nm tigetstr ,
.Nm tparm ,
.Nm tputs ,
.Nm putp ,
.Nm ti_setupterm ,
.Nm ti_getflag ,
.Nm ti_getnum ,
.Nm ti_getstr ,
.Nm tiparm ,
.Nm ti_tiparm ,
.Nm ti_puts ,
.Nm ti_putp
.Nd terminal independent operation routines
.Sh LIBRARY
.Lb libterminfo
.Sh SYNOPSIS
.In term.h
.Vt char PC ;
.Vt short ospeed ;
.Vt TERMINAL *cur_term ;
.Ft int
.Fn setupterm "const char *name" "int fildes" "int *errret"
.Ft TERMINAL *
.Fn set_curterm "TERMINAL *nterm"
.Ft int
.Fn del_curterm "TERMINAL *oterm"
.Ft char *
.Fn termname "void"
.Ft char *
.Fn longname "void"
.Ft int
.Fn tigetnum "const char *id"
.Ft int
.Fn tigetflag "const char *id"
.Ft char *
.Fn tigetstr "const char *id"
.Ft char *
.Fn tparm "const char *cm" "long p1" "long p2" "long p3" "long p4" "long p5" "long p6" "long p7" "long p8" "long p9"
.Ft int
.Fn tputs "const char *cp" "int affcnt" "int (*outc)(int)"
.Ft int
.Fn putp "const char *cp"
.Ft int
.Fn ti_setupterm "TERMINAL **" "const char *name" "int fildes" "int *error"
.Ft int
.Fn ti_getflag "const TERMINAL *" "const char *id"
.Ft int
.Fn ti_getnum "const TERMINAL *" "const char *id"
.Ft const char *
.Fn ti_getstr "const TERMINAL *" "const char *id"
.Ft char *
.Fn tiparm "const char *cm" "..."
.Ft char *
.Fn ti_tiparm "TERMINAL *" "const char *cm" "..."
.Ft int
.Fn ti_puts "const TERMINAL *term" "const char *str" "int affcnt" "int (*outc)(int ch, void *arg)" "void *arg"
.Ft int
.Fn ti_putp "const TERMINAL *term" "const char *str"
.Sh DESCRIPTION
These functions extract and use capabilities from a terminal capability
database, usually
.Pa /usr/share/misc/terminfo ,
the format of which is described in
.Xr terminfo 5 .
These are low level routines;
see
.Xr curses 3
for a higher level package.
.Pp
The
.Fn setupterm
function extracts the entry for terminal
.Fa name
and then calls
.Fn set_curterm
to set
.Va cur_term
to it.
If
.Fa name
is
.Dv NULL
then it is replaced by the environment variable
.Ev TERM .
The
.Fn setupterm
function returns 0 on success and \-1 on error.
.Va errret
is set to \-1 if the
.Nm terminfo
database could not be opened,
0 if the terminal could not be found in the database, and
1 if all went well.
.Pp
The
.Fn set_curterm
function sets the variable
.Va cur_term
to
.Va nterm
and makes all of the
.Nm terminfo
boolean, numeric and string variables use the values from
.Va nterm .
The global variables
.Va PC
and
.Va ospeed
are then set.
The old value of
.Va cur_term
is returned.
The
.Fn del_curterm
function frees space pointed to by
.Va oterm .
.Pp
The
.Fn termname
function returns the name of
.Va cur_term .
The
.Fn longname
function returns the description of
.Va cur_term .
.Pp
The
.Fn tigetflag
function gets the boolean value of capability
.Va id ,
returning \-1 if it is not a valid capability.
The
.Fn tigetnum
function gets the numeric value of the capability
.Va id ,
returning \-2 if it is not a valid capability.
The
.Fn tigetstr
function returns the string value of the capability
.Va id ,
returning (char *)-1 if it is not a valid capability.
.Pp
The
.Fn tparm
function returns a string decoded from
.Va cm
with the parameters
.Va p1
\&...
.Va p9
applied.
Some capabilities require string parameters and only platforms that can fit
a
.Vt char *
pointer inside a
.Vt long
can use them.
For platforms which don't support this,
.Dv NULL
is returned and
.Va errno
is set to
.Er ENOTSUPP .
The string encoding and parameter application is described in
.Xr terminfo 5 .
.Pp
The
.Fn tputs
function applies padding information to the string
.Va cp ;
.Va affcnt
gives the number of lines affected by the operation,
or 1 if this is not applicable;
.Va outc
is a function which is called by each character in turn.
The external variable
.Va ospeed
controls how many padding characters are sent in relation to the terminal
speed.
The
.Fn putp
function calls tputs(str, 1, putchar).
The output from
.Fn putp
always goes to stdout.
.Ss NetBSD Extensions To Terminfo
The
.Fn tiparm
function allows variadic parameters instead of 9 fixed longs.
Numeric parameters must be passed as
.Vt int .
String parameters must be passed as
.Vt char *
and works on all platforms, unlike
.Fn tparm .
.Pp
The
.Fn ti_*
functions correspond to the standard
.Fn t*
functions but take an additional
.Ft TERMINAL *
parameter so that the terminal can be specified instead of assuming
.Va cur_term .
These functions use private variables to the
.Ft TERMINAL
instead of the global variables, such as
.Va PC
and
.Va ospeed .
.Sh SEE ALSO
.Xr ex 1 ,
.Xr curses 3 ,
.Xr terminfo 5
.Sh AUTHORS
.An Roy Marples Aq Mt roy@NetBSD.org