MirBSD manpage: curs_termcap(3), termcap(3), tgetent(3), tgetflag(3), tgetnum(3), tgetstr(3), tgoto(3), tparam(3)

curs_termcap(3)     UNIX Programmer's Manual      curs_termcap(3)


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


     #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));


     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 ter-
     minfo 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 tget-
     flag, tgetnum and tgetstr are compared in lookups.

     The tgoto routine instantiates the parameters into the given
     capability. The output from this routine is to be passed to

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

     The variables PC, UP and BC are set by tgetent to the

MirBSD #10-current     Printed 2022-12-23                       1

curs_termcap(3)     UNIX Programmer's Manual      curs_termcap(3)

     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


     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 comple-

     Routines that return pointers return NULL on error.


     If you call tgetstr to fetch ca or any other parameterized
     string, be aware that it will be returned in terminfo nota-
     tion, not the older and not-quite-compatible termcap nota-
     tion.  This won't 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
     support 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 capabilities differ from termcap's, tputs("50"); will
     put out a literal "50" rather than busy-waiting for 50 mil-
     liseconds.  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 char-
     acter set. This implementation checks for, and modifies the
     data shown to the termcap interface to accommodate termcap's
     limitation in this respect.


     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 docu-
     mented 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 misin-
     terpreted to mean that tgetent returns OK or ERR. Because
     the purpose of these functions is to provide compatibility
     with the termcap library, that is a defect in XCurses, Issue

MirBSD #10-current     Printed 2022-12-23                       2

curs_termcap(3)     UNIX Programmer's Manual      curs_termcap(3)

     4, Version 2 rather than in ncurses.

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


     curses(3), terminfo(5), putc(3).

MirBSD #10-current     Printed 2022-12-23                       3

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