Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
curs_termcap(3X)					      curs_termcap(3X)

NAME
       tgetent,	 tgetflag,  tgetnum,  tgetstr,	tgoto,	tputs  - direct	curses
       interface to the	terminfo capability database

SYNOPSIS
       #include	<curses.h>
       #include	<term.h>

       extern char PC;
       extern char * UP;
       extern char * BC;
       extern short ospeed;

       int tgetent(char	*bp, const char	*name);
       int tgetflag(char *id);
       int tgetnum(char	*id);
       char *tgetstr(char *id, char **area);
       char *tgoto(const char *cap, int	col, int row);
       int tputs(const char *str, int affcnt, int (*putc)(int));

DESCRIPTION
       These routines are included as a	conversion aid for programs  that  use
       the  termcap  library.	Their parameters are the same and the routines
       are emulated using the terminfo database.  Thus,	they can only be  used
       to  query  the  capabilities  of	entries	for which a terminfo entry has
       been compiled.

       The tgetent routine loads the entry for name.  It returns 1 on success,
       0  if there is no such entry, and -1 if the terminfo database could not
       be found.  The emulation	ignores	the buffer pointer bp.

       The tgetflag routine gets the boolean entry for id, or zero  if	it  is
       not available.

       The  tgetnum  routine gets the numeric entry for	id, or -1 if it	is not
       available.

       The tgetstr routine returns the string entry for	id, or zero if	it  is
       not  available.	 Use  tputs to output the returned string.  The	return
       value will also be copied to the	buffer pointed to  by  area,  and  the
       area value will be updated to point past	the null ending	this value.

       Only  the first two characters of the id	parameter of tgetflag, tgetnum
       and tgetstr are compared	in lookups.

       The tgoto routine instantiates the parameters into the  given  capabil-
       ity.  The output	from this routine is to	be passed to tputs.

       The  tputs  routine  is described on the	curs_terminfo(3X) manual page.
       It can retrieve capabilities by either termcap or terminfo name.

       The variables PC, UP and	BC are set by tgetent to the terminfo  entry's
       data for	pad_char, cursor_up and	backspace_if_not_bs, respectively.  UP
       is not used by ncurses.	PC is used in the tdelay_output	function.   BC
       is  used	in the tgoto emulation.	 The variable ospeed is	set by ncurses
       in a system-specific coding to reflect the terminal speed.

RETURN VALUE
       Except where explicitly noted, routines that return an  integer	return
       ERR  upon  failure  and OK (SVr4	only specifies "an integer value other
       than ERR") upon successful completion.

       Routines	that return pointers return NULL on error.

BUGS
       If you call tgetstr to fetch ca or any other parameterized  string,  be
       aware  that it will be returned in terminfo notation, not the older and
       not-quite-compatible termcap notation.  This will not cause problems if
       all  you	do with	it is call tgoto or tparm, which both expand terminfo-
       style strings as	terminfo.  (The	tgoto function,	if configured to  sup-
       port  termcap,  will  check  if	the string is indeed terminfo-style by
       looking for "%p"	parameters or "$<..>" delays, and  invoke  a  termcap-
       style parser if the string does not appear to be	terminfo).

       Because	terminfo  conventions for representing padding in string capa-
       bilities	differ from termcap's, tputs("50"); will  put  out  a  literal
       "50" rather than	busy-waiting for 50 milliseconds.  Cope	with it.

       Note  that termcap has nothing analogous	to terminfo's sgr string.  One
       consequence of this is that termcap applications	 assume	 me  (terminfo
       sgr0)  does not reset the alternate character set.  This	implementation
       checks for, and modifies	the data shown to  the	termcap	 interface  to
       accommodate termcap's limitation	in this	respect.

PORTABILITY
       The  XSI	 Curses	standard, Issue	4 describes these functions.  However,
       they are	marked TO BE WITHDRAWN and may be removed in future  versions.

       Neither	the  XSI Curses	standard nor the SVr4 man pages	documented the
       return values of	tgetent	correctly,  though  all	 three	were  in  fact
       returned	ever since SVr1.  In particular, an omission in	the XSI	Curses
       documentation has been misinterpreted to	mean that tgetent  returns  OK
       or  ERR.	 Because the purpose of	these functions	is to provide compati-
       bility with the termcap library,	that is	a defect in XCurses, Issue  4,
       Version 2 rather	than in	ncurses.

       External	variables are provided for support of certain termcap applica-
       tions.  However,	termcap	applications' use of those variables is	poorly
       documented, e.g., not distinguishing between input and output.  In par-
       ticular,	some  applications  are	 reported  to  declare	and/or	modify
       ospeed.

SEE ALSO
       curses(3X), terminfo(5),	putc(3).

							      curs_termcap(3X)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | BUGS | PORTABILITY | SEE ALSO

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=termcap&sektion=3&manpath=FreeBSD+9.3-RELEASE>

home | help