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-<H1>curs_terminfo 3x</H1>
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+<H1 class="no-header">curs_terminfo 3x 2023-12-30 ncurses 6.4 Library calls</H1>
<PRE>
-<!-- Manpage converted by man2html 3.0.1 -->
-<STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG> <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>
+<STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>
-</PRE>
-<H2>NAME</H2><PRE>
- <STRONG>del_curterm</STRONG>, <STRONG>mvcur</STRONG>, <STRONG>putp</STRONG>, <STRONG>restartterm</STRONG>, <STRONG>set_curterm</STRONG>,
- <STRONG>setterm</STRONG>, <STRONG>setupterm</STRONG>, <STRONG>tigetflag</STRONG>, <STRONG>tigetnum</STRONG>, <STRONG>tigetstr</STRONG>, <STRONG>tparm</STRONG>,
- <STRONG>tputs</STRONG>, <STRONG>vid_attr</STRONG>, <STRONG>vid_puts</STRONG>, <STRONG>vidattr</STRONG>, <STRONG>vidputs</STRONG> - <STRONG>curses</STRONG>
- interfaces to terminfo database
+</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
+ <STRONG>del_curterm</STRONG>, <STRONG>mvcur</STRONG>, <STRONG>putp</STRONG>, <STRONG>restartterm</STRONG>, <STRONG>set_curterm</STRONG>, <STRONG>setupterm</STRONG>,
+ <STRONG>tigetflag</STRONG>, <STRONG>tigetnum</STRONG>, <STRONG>tigetstr</STRONG>, <STRONG>tiparm</STRONG>, <STRONG>tiparm_s</STRONG>, <STRONG>tiscan_s</STRONG>, <STRONG>tparm</STRONG>,
+ <STRONG>tputs</STRONG>, <STRONG>vid_attr</STRONG>, <STRONG>vid_puts</STRONG>, <STRONG>vidattr</STRONG>, <STRONG>vidputs</STRONG> - <EM>curses</EM> interfaces to
+ <EM>terminfo</EM> database
-</PRE>
-<H2>SYNOPSIS</H2><PRE>
+</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>#include</STRONG> <STRONG><term.h></STRONG>
- <STRONG>int</STRONG> <STRONG>setupterm(char</STRONG> <STRONG>*</STRONG><EM>term</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>fildes</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>errret</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>setterm(char</STRONG> <STRONG>*</STRONG><EM>term</EM><STRONG>);</STRONG>
+ <STRONG>TERMINAL</STRONG> <STRONG>*cur_term;</STRONG>
+
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>boolnames[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>boolcodes[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>boolfnames[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>numnames[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>numcodes[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>numfnames[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>strnames[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>strcodes[];</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG> <STRONG>const</STRONG> <STRONG>strfnames[];</STRONG>
+
+ <STRONG>int</STRONG> <STRONG>setupterm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>term</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>filedes</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>errret</EM><STRONG>);</STRONG>
<STRONG>TERMINAL</STRONG> <STRONG>*set_curterm(TERMINAL</STRONG> <STRONG>*</STRONG><EM>nterm</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>del_curterm(TERMINAL</STRONG> <STRONG>*</STRONG><EM>oterm</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>restartterm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>term</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>fildes</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>errret</EM><STRONG>);</STRONG>
- <STRONG>char</STRONG> <STRONG>*tparm(char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
+ <STRONG>int</STRONG> <STRONG>restartterm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>term</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>filedes</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>errret</EM><STRONG>);</STRONG>
+
+ <STRONG>char</STRONG> <STRONG>*tparm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> ...<STRONG>);</STRONG>
+ <EM>/*</EM> <EM>or</EM> <EM>*/</EM>
+ <STRONG>char</STRONG> <STRONG>*tparm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>long</STRONG> <EM>p1</EM> ... <STRONG>long</STRONG> <EM>p9</EM><STRONG>);</STRONG>
+
<STRONG>int</STRONG> <STRONG>tputs(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>affcnt</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>(*</STRONG><EM>putc</EM><STRONG>)(int));</STRONG>
<STRONG>int</STRONG> <STRONG>putp(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>);</STRONG>
+
<STRONG>int</STRONG> <STRONG>vidputs(chtype</STRONG> <EM>attrs</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>(*</STRONG><EM>putc</EM><STRONG>)(int));</STRONG>
<STRONG>int</STRONG> <STRONG>vidattr(chtype</STRONG> <EM>attrs</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>vid_puts(attr_t</STRONG> <EM>attrs</EM><STRONG>,</STRONG> <STRONG>short</STRONG> <EM>pair</EM><STRONG>,</STRONG> <STRONG>void</STRONG> <STRONG>*</STRONG><EM>opts</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>(*</STRONG><EM>putc</EM><STRONG>)(char));</STRONG>
+ <STRONG>int</STRONG> <STRONG>vid_puts(attr_t</STRONG> <EM>attrs</EM><STRONG>,</STRONG> <STRONG>short</STRONG> <EM>pair</EM><STRONG>,</STRONG> <STRONG>void</STRONG> <STRONG>*</STRONG><EM>opts</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>(*</STRONG><EM>putc</EM><STRONG>)(int));</STRONG>
<STRONG>int</STRONG> <STRONG>vid_attr(attr_t</STRONG> <EM>attrs</EM><STRONG>,</STRONG> <STRONG>short</STRONG> <EM>pair</EM><STRONG>,</STRONG> <STRONG>void</STRONG> <STRONG>*</STRONG><EM>opts</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>mvcur(int</STRONG> <EM>oldrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>oldcol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>newrow</EM>, int <EM>newcol</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>tigetflag(char</STRONG> <STRONG>*</STRONG><EM>capname</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>tigetnum(char</STRONG> <STRONG>*</STRONG><EM>capname</EM><STRONG>);</STRONG>
- <STRONG>char</STRONG> <STRONG>*tigetstr(char</STRONG> <STRONG>*</STRONG><EM>capname</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>mvcur(int</STRONG> <EM>oldrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>oldcol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>newrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>newcol</EM><STRONG>);</STRONG>
-</PRE>
-<H2>DESCRIPTION</H2><PRE>
- These low-level routines must be called by programs that
- have to deal directly with the <STRONG>terminfo</STRONG> database to handle
- certain terminal capabilities, such as programming func-
- tion keys. For all other functionality, <STRONG>curses</STRONG> routines
- are more suitable and their use is recommended.
-
- Initially, <STRONG>setupterm</STRONG> should be called. Note that <STRONG>se-</STRONG>
- <STRONG>tupterm</STRONG> is automatically called by <STRONG>initscr</STRONG> and <STRONG>newterm</STRONG>.
- This defines the set of terminal-dependent variables
- [listed in <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>]. The <STRONG>terminfo</STRONG> variables <STRONG>lines</STRONG> and
- <STRONG>columns</STRONG> are initialized by <STRONG>setupterm</STRONG> as follows: If
- <STRONG>use_env(FALSE)</STRONG> has been called, values for <STRONG>lines</STRONG> and
- <STRONG>columns</STRONG> specified in <STRONG>terminfo</STRONG> are used. Otherwise, if the
- environment variables <STRONG>LINES</STRONG> and <STRONG>COLUMNS</STRONG> exist, their val-
- ues are used. If these environment variables do not exist
- and the program is running in a window, the current window
- size is used. Otherwise, if the environment variables do
- not exist, the values for <STRONG>lines</STRONG> and <STRONG>columns</STRONG> specified in
- the <STRONG>terminfo</STRONG> database are used.
-
- The header files <STRONG>curses.h</STRONG> and <STRONG>term.h</STRONG> should be included
- (in this order) to get the definitions for these strings,
- numbers, and flags. Parameterized strings should be
- passed through <STRONG>tparm</STRONG> to instantiate them. All <STRONG>terminfo</STRONG>
- strings [including the output of <STRONG>tparm</STRONG>] should be printed
- with <STRONG>tputs</STRONG> or <STRONG>putp</STRONG>. Call the <STRONG>reset_shell_mode</STRONG> to restore
- the tty modes before exiting [see <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>]. Pro-
- grams which use cursor addressing should output <STRONG>en-</STRONG>
- <STRONG>ter_ca_mode</STRONG> upon startup and should output <STRONG>exit_ca_mode</STRONG>
- before exiting. Programs desiring shell escapes should
- call
-
- <STRONG>reset_shell_mode</STRONG> and output <STRONG>exit_ca_mode</STRONG> before the shell
- is called and should output <STRONG>enter_ca_mode</STRONG> and call <STRONG>re-</STRONG>
- <STRONG>set_prog_mode</STRONG> after returning from the shell.
-
- The <STRONG>setupterm</STRONG> routine reads in the <STRONG>terminfo</STRONG> database, ini-
- tializing the <STRONG>terminfo</STRONG> structures, but does not set up the
- output virtualization structures used by <STRONG>curses</STRONG>. The ter-
- minal type is the character string <EM>term</EM>; if <EM>term</EM> is null,
- the environment variable <STRONG>TERM</STRONG> is used. All output is to
- file descriptor <STRONG>fildes</STRONG> which is initialized for output.
- If <EM>errret</EM> is not null, then <STRONG>setupterm</STRONG> returns <STRONG>OK</STRONG> or <STRONG>ERR</STRONG>
- and stores a status value in the integer pointed to by <EM>er-</EM>
- <EM>rret</EM>. A return value of <STRONG>OK</STRONG> combined with status of <STRONG>1</STRONG> in
- <EM>errret</EM> is normal. If <STRONG>ERR</STRONG> is returned, examine <EM>errret</EM>:
-
- <STRONG>1</STRONG> means that the terminal is hardcopy, cannot be
- used for curses applications.
-
- <STRONG>0</STRONG> means that the terminal could not be found, or
- that it is a generic type, having too little
- information for curses applications to run.
-
- <STRONG>-1</STRONG> means that the <STRONG>terminfo</STRONG> database could not be
- found.
-
- If <EM>errret</EM> is null, <STRONG>setupterm</STRONG> prints an error message upon
- finding an error and exits. Thus, the simplest call is:
-
- <STRONG>setupterm((char</STRONG> <STRONG>*)0,</STRONG> <STRONG>1,</STRONG> <STRONG>(int</STRONG> <STRONG>*)0);</STRONG>,
-
- which uses all the defaults and sends the output to <STRONG>std-</STRONG>
- <STRONG>out</STRONG>.
-
- The <STRONG>setterm</STRONG> routine is being replaced by <STRONG>setupterm</STRONG>. The
- call:
-
- <STRONG>setupterm(</STRONG><EM>term</EM><STRONG>,</STRONG> <STRONG>1,</STRONG> <STRONG>(int</STRONG> <STRONG>*)0)</STRONG>
-
- provides the same functionality as <STRONG>setterm(</STRONG><EM>term</EM><STRONG>)</STRONG>. The
- <STRONG>setterm</STRONG> routine is included here for BSD compatibility,
- and is not recommended for new programs.
-
- The <STRONG>set_curterm</STRONG> routine sets the variable <STRONG>cur_term</STRONG> to
- <EM>nterm</EM>, and makes all of the <STRONG>terminfo</STRONG> boolean, numeric, and
- string variables use the values from <EM>nterm</EM>. It returns
- the old value of <STRONG>cur_term</STRONG>.
-
- The <STRONG>del_curterm</STRONG> routine frees the space pointed to by
- <EM>oterm</EM> and makes it available for further use. If <EM>oterm</EM> is
- the same as <STRONG>cur_term</STRONG>, references to any of the <STRONG>terminfo</STRONG>
- boolean, numeric, and string variables thereafter may re-
- fer to invalid memory locations until another <STRONG>setupterm</STRONG>
- has been called.
-
- The <STRONG>restartterm</STRONG> routine is similar to <STRONG>setupterm</STRONG> and
- <STRONG>initscr</STRONG>, except that it is called after restoring memory
- to a previous state (for example, when reloading a game
- saved as a core image dump). It assumes that the windows
- and the input and output options are the same as when mem-
- ory was saved, but the terminal type and baud rate may be
- different. Accordingly, it saves various tty state bits,
- does a setupterm, and then restores the bits.
-
- The <STRONG>tparm</STRONG> routine instantiates the string <EM>str</EM> with parame-
- ters <EM>pi</EM>. A pointer is returned to the result of <EM>str</EM> with
- the parameters applied.
-
- The <STRONG>tputs</STRONG> routine applies padding information to the
- string <EM>str</EM> and outputs it. The <EM>str</EM> must be a terminfo
- string variable or the return value from <STRONG>tparm</STRONG>, <STRONG>tgetstr</STRONG>,
- or <STRONG>tgoto</STRONG>. <EM>affcnt</EM> is the number of lines affected, or 1 if
- not applicable. <EM>putc</EM> is a <STRONG>putchar</STRONG>-like routine to which
- the characters are passed, one at a time.
-
- The <STRONG>putp</STRONG> routine calls <STRONG>tputs(</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>1,</STRONG> <STRONG>putchar)</STRONG>. Note that
- the output of <STRONG>putp</STRONG> always goes to <STRONG>stdout</STRONG>, not to the
- <EM>fildes</EM> specified in <STRONG>setupterm</STRONG>.
-
- The <STRONG>vidputs</STRONG> routine displays the string on the terminal in
- the video attribute mode <EM>attrs</EM>, which is any combination
- of the attributes listed in <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>. The characters
- are passed to the <STRONG>putchar</STRONG>-like routine <EM>putc</EM>.
-
- The <STRONG>vidattr</STRONG> routine is like the <STRONG>vidputs</STRONG> routine, except
- that it outputs through <STRONG>putchar</STRONG>.
-
- The <STRONG>vid_attr</STRONG> and <STRONG>vid_puts</STRONG> routines correspond to vidattr
- and vidputs, respectively. They use a set of arguments
- for representing the video attributes plus color, i.e.,
- one of type attr_t for the attributes and one of short for
- the color_pair number. The <STRONG>vid_attr</STRONG> and <STRONG>vid_puts</STRONG> routines
- are designed to use the attribute constants with the <EM>WA</EM><STRONG>_</STRONG>
- prefix. The opts argument is reserved for future use.
- Currently, applications must provide a null pointer for
- that argument.
-
- The <STRONG>mvcur</STRONG> routine provides low-level cursor motion. It
- takes effect immediately (rather than at the next re-
- fresh).
-
- The <STRONG>tigetflag</STRONG>, <STRONG>tigetnum</STRONG> and <STRONG>tigetstr</STRONG> routines return the
- value of the capability corresponding to the <STRONG>terminfo</STRONG> <EM>cap-</EM>
- <EM>name</EM> passed to them, such as <STRONG>xenl</STRONG>.
-
- The <STRONG>tigetflag</STRONG> routine returns the value <STRONG>-1</STRONG> if <EM>capname</EM> is
- not a boolean capability, or <STRONG>0</STRONG> if it is canceled or absent
- from the terminal description.
-
- The <STRONG>tigetnum</STRONG> routine returns the value <STRONG>-2</STRONG> if <EM>capname</EM> is
- not a numeric capability, or <STRONG>-1</STRONG> if it is canceled or ab-
- sent from the terminal description.
+ <STRONG>int</STRONG> <STRONG>tigetflag(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>capname</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>tigetnum(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>capname</EM><STRONG>);</STRONG>
+ <STRONG>char</STRONG> <STRONG>*tigetstr(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>capname</EM><STRONG>);</STRONG>
- The <STRONG>tigetstr</STRONG> routine returns the value <STRONG>(char</STRONG> <STRONG>*)-1</STRONG> if <EM>cap-</EM>
- <EM>name</EM> is not a string capability, or <STRONG>0</STRONG> if it is canceled or
- absent from the terminal description.
+ <STRONG>char</STRONG> <STRONG>*tiparm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> ...<STRONG>);</STRONG>
- The <EM>capname</EM> for each capability is given in the table col-
- umn entitled <EM>capname</EM> code in the capabilities section of
- <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>.
+ <EM>/*</EM> <EM>extensions</EM> <EM>*/</EM>
+ <STRONG>char</STRONG> <STRONG>*tiparm_s(int</STRONG> <EM>expected</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>mask</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
+ <STRONG>int</STRONG> <STRONG>tiscan_s(int</STRONG> <STRONG>*</STRONG><EM>expected</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>mask</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>str</EM><STRONG>);</STRONG>
- <STRONG>char</STRONG> <STRONG>*boolnames[]</STRONG>, <STRONG>*boolcodes[]</STRONG>, <STRONG>*boolfnames[]</STRONG>
+ <EM>/*</EM> <EM>deprecated</EM> <EM>*/</EM>
+ <STRONG>int</STRONG> <STRONG>setterm(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>term</EM><STRONG>);</STRONG>
- <STRONG>char</STRONG> <STRONG>*numnames[]</STRONG>, <STRONG>*numcodes[]</STRONG>, <STRONG>*numfnames[]</STRONG>
- <STRONG>char</STRONG> <STRONG>*strnames[]</STRONG>, <STRONG>*strcodes[]</STRONG>, <STRONG>*strfnames[]</STRONG>
+</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+ These low-level routines must be called by programs that have to deal
+ directly with the <EM>terminfo</EM> database to handle certain terminal
+ capabilities, such as programming function keys. For all other
+ functionality, <EM>curses</EM> routines are more suitable and their use is
+ recommended.
- These null-terminated arrays contain the <EM>capnames</EM>, the
- <STRONG>termcap</STRONG> codes, and the full C names, for each of the <STRONG>ter-</STRONG>
- <STRONG>minfo</STRONG> variables.
+ None of these functions use (or are aware of) multibyte character
+ strings such as UTF-8.
+ <STRONG>o</STRONG> Capability names and codes use the POSIX portable character set.
-</PRE>
-<H2>RETURN VALUE</H2><PRE>
- Routines that return an integer return <STRONG>ERR</STRONG> upon failure
- and <STRONG>OK</STRONG> (SVr4 only specifies "an integer value other than
- <STRONG>ERR</STRONG>") upon successful completion, unless otherwise noted
- in the preceding routine descriptions.
+ <STRONG>o</STRONG> Capability string values have no associated encoding; they are
+ strings of 8-bit characters.
- Routines that return pointers always return <STRONG>NULL</STRONG> on error.
- X/Open defines no error conditions. In this implementa-
- tion
+</PRE><H3><a name="h3-Initialization">Initialization</a></H3><PRE>
+ Initially, <STRONG>setupterm</STRONG> should be called. The high-level <EM>curses</EM> functions
+ <STRONG>initscr</STRONG> and <STRONG>newterm</STRONG> call <STRONG>setupterm</STRONG> to initialize the low-level set of
+ terminal-dependent variables listed in <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>.
- <STRONG>del_curterm</STRONG>
- returns an error if its terminal parameter is
- null.
+ Applications can use the terminal capabilities either directly (via
+ header definitions), or by special functions. The header files
+ <EM>curses.h</EM> and <EM>term.h</EM> should be included (in that order) to get the
+ definitions for these strings, numbers, and flags.
- <STRONG>restartterm</STRONG>
- returns an error if the associated call to <STRONG>se-</STRONG>
- <STRONG>tupterm</STRONG> returns an error.
+ The <EM>terminfo</EM> variables <STRONG>lines</STRONG> and <STRONG>columns</STRONG> are initialized by <STRONG>setupterm</STRONG>
+ as follows:
- <STRONG>setupterm</STRONG>
- returns an error if it cannot allocate enough
- memory, or create the initial windows (stdscr,
- curscr, newscr). Other error conditions are
- documented above.
+ <STRONG>o</STRONG> If <STRONG>use_env(FALSE)</STRONG> has been called, values for <STRONG>lines</STRONG> and <STRONG>columns</STRONG>
+ specified in <EM>terminfo</EM> are used.
+ <STRONG>o</STRONG> Otherwise, if the environment variables <EM>LINES</EM> and <EM>COLUMNS</EM> exist,
+ their values are used. If these environment variables do not exist
+ and the program is running in a window, the current window size is
+ used. Otherwise, if the environment variables do not exist, the
+ values for <STRONG>lines</STRONG> and <STRONG>columns</STRONG> specified in the <EM>terminfo</EM> database are
+ used.
-</PRE>
-<H2>NOTES</H2><PRE>
- The <STRONG>setupterm</STRONG> routine should be used in place of <STRONG>setterm</STRONG>.
- It may be useful when you want to test for terminal capa-
- bilities without committing to the allocation of storage
- involved in <STRONG>initscr</STRONG>.
+ Parameterized strings should be passed through <STRONG>tparm</STRONG> to instantiate
+ them. All <EM>terminfo</EM> strings (including the output of <STRONG>tparm</STRONG>) should be
+ printed with <STRONG>tputs</STRONG> or <STRONG>putp</STRONG>. Call <STRONG>reset_shell_mode</STRONG> to restore the tty
+ modes before exiting [see <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>].
- Note that <STRONG>vidattr</STRONG> and <STRONG>vidputs</STRONG> may be macros.
+ Programs which use cursor addressing should
+ <STRONG>o</STRONG> output <STRONG>enter_ca_mode</STRONG> upon startup and
-</PRE>
-<H2>PORTABILITY</H2><PRE>
- The function <STRONG>setterm</STRONG> is not described in the XSI Curses
- standard and must be considered non-portable. All other
- functions are as described in the XSI curses standard.
-
- In System V Release 4, <STRONG>set_curterm</STRONG> has an <STRONG>int</STRONG> return type
- and returns <STRONG>OK</STRONG> or <STRONG>ERR</STRONG>. We have chosen to implement the
- XSI Curses semantics.
-
- In System V Release 4, the third argument of <STRONG>tputs</STRONG> has the
- type <STRONG>int</STRONG> <STRONG>(*putc)(char)</STRONG>.
-
- The XSI Curses standard prototypes <STRONG>tparm</STRONG> with a fixed num-
- ber of parameters, rather than a variable argument list.
- This implementation uses a variable argument list.
- Portable applications should provide 9 parameters after
- the format; zeroes are fine for this purpose.
-
- XSI notes that after calling <STRONG>mvcur</STRONG>, the curses state may
- not match the actual terminal state, and that an applica-
- tion should touch and refresh the window before resuming
- normal curses calls. Both ncurses and System V Release 4
- curses implement <STRONG>mvcur</STRONG> using the SCREEN data allocated in
- either <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG>. So though it is documented as
- a terminfo function, <STRONG>mvcur</STRONG> is really a curses function
- which is not well specified.
-
- XSI states that the old location must be given. This im-
- plementation allows the caller to use -1's for the old or-
- dinates. In that case, the old location is unknown.
-
- Extended terminal capability names, e.g., as defined by
- <STRONG>tic</STRONG> <STRONG>-x</STRONG>, are not stored in the arrays described in this
- section.
+ <STRONG>o</STRONG> output <STRONG>exit_ca_mode</STRONG> before exiting.
+ Programs which execute shell subprocesses should
-</PRE>
-<H2>SEE ALSO</H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>, <STRONG>curs_term-</STRONG>
- <STRONG><A HREF="curs_termcap.3x.html">cap(3x)</A></STRONG>, <STRONG><A HREF="putc.3S.html">putc(3S)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
+ <STRONG>o</STRONG> call <STRONG>reset_shell_mode</STRONG> and output <STRONG>exit_ca_mode</STRONG> before the shell is
+ called and
+
+ <STRONG>o</STRONG> output <STRONG>enter_ca_mode</STRONG> and call <STRONG>reset_prog_mode</STRONG> after returning from
+ the shell.
+
+ The <STRONG>setupterm</STRONG> routine reads in the <EM>terminfo</EM> database, initializing the
+ <EM>terminfo</EM> structures, but does not set up the output virtualization
+ structures used by <EM>curses.</EM> These are its parameters:
+
+ <EM>term</EM> is the terminal type, a character string. If <EM>term</EM> is null, the
+ environment variable <EM>TERM</EM> is used.
+
+ <EM>filedes</EM>
+ is the file descriptor used for getting and setting terminal
+ I/O modes.
+
+ Higher-level applications use <STRONG><A HREF="curs_initscr.3x.html">newterm(3x)</A></STRONG> for initializing the
+ terminal, passing an output <EM>stream</EM> rather than a <EM>descriptor</EM>.
+ In curses, the two are the same because <STRONG>newterm</STRONG> calls
+ <STRONG>setupterm</STRONG>, passing the file descriptor derived from its output
+ stream parameter.
+
+ <EM>errret</EM>
+ points to an optional location where an error status can be
+ returned to the caller. If <EM>errret</EM> is not null, then <STRONG>setupterm</STRONG>
+ returns <STRONG>OK</STRONG> or <STRONG>ERR</STRONG> and stores a status value in the integer
+ pointed to by <EM>errret</EM>. A return value of <STRONG>OK</STRONG> combined with
+ status of <STRONG>1</STRONG> in <EM>errret</EM> is normal.
+
+ If <STRONG>ERR</STRONG> is returned, examine <EM>errret</EM>:
+
+ <STRONG>1</STRONG> means that the terminal is hardcopy, cannot be used for
+ <EM>curses</EM> applications.
+
+ <STRONG>setupterm</STRONG> determines if the entry is a hardcopy type by
+ checking the <STRONG>hc</STRONG> (<STRONG>hardcopy</STRONG>) capability.
+
+ <STRONG>0</STRONG> means that the terminal could not be found, or that it is
+ a generic type, having too little information for <EM>curses</EM>
+ applications to run.
+
+ <STRONG>setupterm</STRONG> determines if the entry is a generic type by
+ checking the <STRONG>gn</STRONG> (<STRONG>generic_type</STRONG>) capability.
+
+ <STRONG>-1</STRONG> means that the <EM>terminfo</EM> database could not be found.
+
+ If <EM>errret</EM> is null, <STRONG>setupterm</STRONG> prints an error message upon
+ finding an error and exits. Thus, the simplest call is:
+
+ <STRONG>setupterm((char</STRONG> <STRONG>*)0,</STRONG> <STRONG>1,</STRONG> <STRONG>(int</STRONG> <STRONG>*)0);</STRONG>
+
+ which uses all the defaults and sends the output to <STRONG>stdout</STRONG>.
+
+
+</PRE><H3><a name="h3-The-Terminal-State">The Terminal State</a></H3><PRE>
+ The <STRONG>setupterm</STRONG> routine stores its information about the terminal in a
+ <EM>TERMINAL</EM> structure pointed to by the global variable <STRONG>cur_term</STRONG>. If it
+ detects an error, or decides that the terminal is unsuitable (hardcopy
+ or generic), it discards this information, making it not available to
+ applications.
+
+ If <STRONG>setupterm</STRONG> is called repeatedly for the same terminal type, it will
+ reuse the information. It maintains only one copy of a given
+ terminal's capabilities in memory. If it is called for different
+ terminal types, <STRONG>setupterm</STRONG> allocates new storage for each set of
+ terminal capabilities.
+
+ <STRONG>set_curterm</STRONG> sets <STRONG>cur_term</STRONG> to <EM>nterm,</EM> and makes all of the <EM>terminfo</EM>
+ Boolean, numeric, and string variables use the values from <EM>nterm.</EM> It
+ returns the old value of <STRONG>cur_term</STRONG>.
+
+ <STRONG>del_curterm</STRONG> routine frees the space pointed to by <EM>oterm</EM> and makes it
+ available for further use. If <EM>oterm</EM> is the same as <STRONG>cur_term</STRONG>,
+ references to any of the <EM>terminfo</EM> Boolean, numeric, and string
+ variables thereafter may refer to invalid memory locations until
+ another <STRONG>setupterm</STRONG> has been called.
+
+ The <STRONG>restartterm</STRONG> routine is similar to <STRONG>setupterm</STRONG> and <STRONG>initscr</STRONG>, except
+ that it is called after restoring memory to a previous state (for
+ example, when reloading a game saved as a core image dump).
+ <STRONG>restartterm</STRONG> assumes that the windows and the input and output options
+ are the same as when memory was saved, but the terminal type and baud
+ rate may be different. Accordingly, <STRONG>restartterm</STRONG> saves various tty
+ state bits, calls <STRONG>setupterm</STRONG>, and then restores the bits.
+
+
+</PRE><H3><a name="h3-Formatting-Output">Formatting Output</a></H3><PRE>
+ The <STRONG>tparm</STRONG> routine instantiates the string <EM>str</EM> with parameters <EM>pi</EM>. A
+ pointer is returned to the result of <EM>str</EM> with the parameters applied.
+ Application developers should keep in mind these quirks of the
+ interface:
+
+ <STRONG>o</STRONG> Although <STRONG>tparm</STRONG>'s actual parameters may be integers or strings, the
+ prototype expects <STRONG>long</STRONG> (integer) values.
+
+ <STRONG>o</STRONG> Aside from the <STRONG>set_attributes</STRONG> (<STRONG>sgr</STRONG>) capability, most terminal
+ capabilities require no more than one or two parameters.
+
+ <STRONG>o</STRONG> Padding information is ignored by <STRONG>tparm</STRONG>; it is interpreted by
+ <STRONG>tputs</STRONG>.
+
+ <STRONG>o</STRONG> The capability string is null-terminated. Use "\200" where an
+ ASCII NUL is needed in the output.
+
+ <STRONG>tiparm</STRONG> is a newer form of <STRONG>tparm</STRONG> which uses <EM>stdarg.h</EM> rather than a
+ fixed-parameter list. Its numeric parameters are <EM>int</EM>s rather than
+ <EM>long</EM>s.
+
+ Both <STRONG>tparm</STRONG> and <STRONG>tiparm</STRONG> assume that the application passes parameters
+ consistent with the terminal description. Two extensions are provided
+ as alternatives to deal with untrusted data:
+
+ <STRONG>o</STRONG> <STRONG>tiparm_s</STRONG> is an extension which is a safer formatting function than
+ <STRONG>tparm</STRONG> or <STRONG>tiparm</STRONG>, because it allows the developer to tell the curses
+ library how many parameters to expect in the parameter list, and
+ which may be string parameters.
+
+ The <EM>mask</EM> parameter has one bit set for each of the parameters (up
+ to 9) which will be passed as char* rather than numbers.
+
+ <STRONG>o</STRONG> The extension <STRONG>tiscan_s</STRONG> allows the application to inspect a
+ formatting capability to see what the curses library would assume.
+
+
+</PRE><H3><a name="h3-Output-Functions">Output Functions</a></H3><PRE>
+ String capabilities can contain padding information, a time delay
+ (accommodating performance limitations of hardware terminals) expressed
+ as <STRONG>$<</STRONG><EM>n</EM><STRONG>></STRONG>, where <EM>n</EM> is a nonnegative integral count of milliseconds. If <EM>n</EM>
+ exceeds 30,000 (thirty seconds), it is capped at that value.
+
+ The <STRONG>tputs</STRONG> routine interprets time-delay information in the string <EM>str</EM>
+ and outputs it, executing the delays:
+
+ <STRONG>o</STRONG> The <EM>str</EM> parameter must be a terminfo string variable or the return
+ value from <STRONG>tparm</STRONG>, <STRONG>tiparm</STRONG>, <STRONG>tgetstr</STRONG>, or <STRONG>tgoto</STRONG>.
+
+ The <STRONG>tgetstr</STRONG> and <STRONG>tgoto</STRONG> functions are part of the <EM>termcap</EM> interface,
+ which happens to share this function name with the <EM>terminfo</EM>
+ interface.
+
+ <STRONG>o</STRONG> <EM>affcnt</EM> is the number of lines affected, or 1 if not applicable.
+
+ <STRONG>o</STRONG> <EM>putc</EM> is a <EM>putchar</EM>-like function to which the characters are passed,
+ one at a time.
+
+ If <STRONG>tputs</STRONG> processes a time-delay, it uses the <STRONG><A HREF="curs_util.3x.html">delay_output(3x)</A></STRONG>
+ function, routing any resulting padding characters through this
+ function.
+
+ The <STRONG>putp</STRONG> routine calls <STRONG>tputs(</STRONG><EM>str</EM><STRONG>,</STRONG> <STRONG>1,</STRONG> <STRONG>putchar)</STRONG>. The output of <STRONG>putp</STRONG>
+ always goes to <STRONG>stdout</STRONG>, rather than the <EM>filedes</EM> specified in <STRONG>setupterm</STRONG>.
+
+ The <STRONG>vidputs</STRONG> routine displays the string on the terminal in the video
+ attribute mode <EM>attrs</EM>, which is any combination of the attributes listed
+ in <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>. The characters are passed to the <EM>putchar</EM>-like function
+ <EM>putc</EM>.
+
+ The <STRONG>vidattr</STRONG> routine is like the <STRONG>vidputs</STRONG> routine, except that it outputs
+ through <EM>putchar</EM>.
+
+ <STRONG>vid_attr</STRONG> and <STRONG>vid_puts</STRONG> correspond to <STRONG>vidattr</STRONG> and <STRONG>vidputs</STRONG>, respectively.
+ They use multiple parameters to represent the character attributes and
+ color; namely,
+
+ <STRONG>o</STRONG> <EM>attrs,</EM> of type <EM>attr</EM><STRONG>_</STRONG><EM>t,</EM> for the attributes and
+
+ <STRONG>o</STRONG> <EM>pair,</EM> of type <EM>short,</EM> for the color pair number.
+
+ Use the attribute constants prefixed with "<STRONG>WA_</STRONG>" with <STRONG>vid_attr</STRONG> and
+ <STRONG>vid_puts</STRONG>.
+
+ X/Open Curses reserves the <EM>opts</EM> argument for future use, saying that
+ applications must provide a null pointer for that argument; but see
+ section "EXTENSIONS" below.
+
+ The <STRONG>mvcur</STRONG> routine provides low-level cursor motion. It takes effect
+ immediately (rather than at the next refresh). Unlike the other low-
+ level output functions, which either write to the standard output or
+ pass an output function parameter, <STRONG>mvcur</STRONG> uses an output file descriptor
+ derived from the output stream parameter of <STRONG><A HREF="curs_initscr.3x.html">newterm(3x)</A></STRONG>.
+
+ While <STRONG>putp</STRONG> and <STRONG>mvcur</STRONG> are low-level functions which do not use the high-
+ level curses state, they are declared in <EM>curses.h</EM> because System V did
+ this (see <EM>HISTORY</EM>).
+
+
+</PRE><H3><a name="h3-Terminal-Capability-Functions">Terminal Capability Functions</a></H3><PRE>
+ The <STRONG>tigetflag</STRONG>, <STRONG>tigetnum</STRONG> and <STRONG>tigetstr</STRONG> routines return the value of the
+ capability corresponding to the <EM>terminfo</EM> <EM>capname</EM> passed to them, such
+ as <STRONG>xenl</STRONG>. The <EM>capname</EM> for each capability is given in the table column
+ entitled <EM>capname</EM> code in the capabilities section of <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>.
+
+ These routines return special values to denote errors.
+
+ The <STRONG>tigetflag</STRONG> routine returns
+
+ <STRONG>-1</STRONG> if <EM>capname</EM> is not a Boolean capability, or
+
+ <STRONG>0</STRONG> if it is canceled or absent from the terminal description.
+
+ The <STRONG>tigetnum</STRONG> routine returns
+
+ <STRONG>-2</STRONG> if <EM>capname</EM> is not a numeric capability, or
+
+ <STRONG>-1</STRONG> if it is canceled or absent from the terminal description.
+
+ The <STRONG>tigetstr</STRONG> routine returns
+
+ <STRONG>(char</STRONG> <STRONG>*)-1</STRONG>
+ if <EM>capname</EM> is not a string capability, or
+
+ <STRONG>0</STRONG> if it is canceled or absent from the terminal description.
+
+
+</PRE><H3><a name="h3-Terminal-Capability-Names">Terminal Capability Names</a></H3><PRE>
+ These null-terminated arrays contain
+
+ <STRONG>o</STRONG> the short <EM>terminfo</EM> names ("codes"),
+
+ <STRONG>o</STRONG> the <EM>termcap</EM> names ("names"), and
+
+ <STRONG>o</STRONG> the long <EM>terminfo</EM> names ("fnames")
+
+ for each of the predefined <EM>terminfo</EM> variables:
+
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*boolnames[]</STRONG>, <STRONG>*boolcodes[]</STRONG>, <STRONG>*boolfnames[]</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*numnames[]</STRONG>, <STRONG>*numcodes[]</STRONG>, <STRONG>*numfnames[]</STRONG>
+ <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*strnames[]</STRONG>, <STRONG>*strcodes[]</STRONG>, <STRONG>*strfnames[]</STRONG>
+
+
+</PRE><H3><a name="h3-Releasing-Memory">Releasing Memory</a></H3><PRE>
+ Each successful call to <STRONG>setupterm</STRONG> allocates memory to hold the terminal
+ description. As a side-effect, it sets <STRONG>cur_term</STRONG> to point to this
+ memory. If an application calls
+
+ <STRONG>del_curterm(cur_term);</STRONG>
+
+ the memory will be freed.
+
+ The formatting functions <STRONG>tparm</STRONG> and <STRONG>tiparm</STRONG> extend the storage allocated
+ by <STRONG>setupterm</STRONG>:
+
+ <STRONG>o</STRONG> the "static" terminfo variables [a-z]. Before <EM>ncurses</EM> 6.3, those
+ were shared by all screens. With <EM>ncurses</EM> 6.3, those are allocated
+ per screen. See <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG> for details.
+
+ <STRONG>o</STRONG> to improve performance, <EM>ncurses</EM> 6.3 caches the result of analyzing
+ terminfo strings for their parameter types. That is stored as a
+ binary tree referenced from the <EM>TERMINAL</EM> structure.
+
+ The higher-level <STRONG>initscr</STRONG> and <STRONG>newterm</STRONG> functions use <STRONG>setupterm</STRONG>. Normally
+ they do not free this memory, but it is possible to do that using the
+ <STRONG><A HREF="curs_initscr.3x.html">delscreen(3x)</A></STRONG> function.
+
+
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+ X/Open defines no failure conditions. In <EM>ncurses,</EM>
+
+ <STRONG>del_curterm</STRONG>
+ returns an error if its terminal parameter is null.
+
+ <STRONG>putp</STRONG> calls <STRONG>tputs</STRONG>, returning the same error-codes.
+
+ <STRONG>restartterm</STRONG>
+ returns an error if the associated call to <STRONG>setupterm</STRONG> returns an
+ error.
+
+ <STRONG>setupterm</STRONG>
+ returns an error if it cannot allocate enough memory, or create
+ the initial windows (<STRONG>stdscr</STRONG>, <STRONG>curscr</STRONG>, and <STRONG>newscr</STRONG>) Other error
+ conditions are documented above.
+
+ <STRONG>tparm</STRONG>
+ returns a null if the capability would require unexpected
+ parameters, e.g., too many, too few, or incorrect types (strings
+ where integers are expected, or vice versa).
+
+ <STRONG>tputs</STRONG>
+ returns an error if the string parameter is null. It does not
+ detect I/O errors: X/Open Curses states that <STRONG>tputs</STRONG> ignores the
+ return value of the output function <EM>putc</EM>.
+
+
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ The <STRONG>vid_attr</STRONG> function in <EM>ncurses</EM> is a special case. It was originally
+ implemented based on a draft of X/Open Curses, as a macro, before other
+ parts of the <EM>ncurses</EM> wide-character API were developed, and unlike the
+ other wide-character functions, is also provided in the non-wide-
+ character configuration.
+
+
+</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
+ The functions marked as extensions were designed for <EM>ncurses,</EM> and are
+ not found in SVr4 <EM>curses</EM>, 4.4BSD <EM>curses</EM>, or any other previous curses
+ implementation.
+
+ <EM>ncurses</EM> allows <EM>opts</EM> to be a pointer to <EM>int,</EM> which overrides the <EM>pair</EM>
+ (<EM>short</EM>) argument.
+
+
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+ <STRONG>setterm</STRONG> is not described by X/Open and must be considered non-portable.
+ All other functions are as described by X/Open.
+
+
+</PRE><H3><a name="h3-Compatibility-Macros">Compatibility Macros</a></H3><PRE>
+ This implementation provides a few macros for compatibility with
+ systems before SVr4 (see section "HISTORY" below). They include
+ <STRONG>Bcrmode</STRONG>, <STRONG>Bfixterm</STRONG>, <STRONG>Bgettmode</STRONG>, <STRONG>Bnocrmode</STRONG>, <STRONG>Bresetterm</STRONG>, <STRONG>Bsaveterm</STRONG>, and
+ <STRONG>Bsetterm</STRONG>.
+
+ In SVr4, these are found in <EM>curses.h</EM>, but except for <STRONG>setterm</STRONG>, are
+ likewise macros. The one function, <STRONG>setterm</STRONG>, is mentioned in the manual
+ page. It further notes that <STRONG>setterm</STRONG> was replaced by <STRONG>setupterm</STRONG>, stating
+ that the call
+ setupterm(<EM>term</EM>, 1, (int *)0)
+ provides the same functionality as <STRONG>setterm(</STRONG><EM>term</EM><STRONG>)</STRONG>, discouraging the
+ latter for new programs. <EM>ncurses</EM> implements each of these symbols as
+ macros for BSD <EM>curses</EM> compatibility.
+
+
+</PRE><H3><a name="h3-Legacy-Data">Legacy Data</a></H3><PRE>
+ <STRONG>setupterm</STRONG> copies the terminal name to the array <STRONG>ttytype</STRONG>. This is not
+ part of X/Open Curses, but is assumed by some applications.
+
+ Other implementions may not declare the capability name arrays. Some
+ provide them without declaring them. X/Open does not specify them.
+
+ Extended terminal capability names, as defined by "<STRONG>tic</STRONG> <STRONG>-x</STRONG>", are not
+ stored in the arrays described here.
+
+
+</PRE><H3><a name="h3-Output-Buffering">Output Buffering</a></H3><PRE>
+ Older versions of <EM>ncurses</EM> assumed that the file descriptor passed to
+ <STRONG>setupterm</STRONG> from <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG> uses buffered I/O, and would write to
+ the corresponding stream. In addition to the limitation that the
+ terminal was left in block-buffered mode on exit (like System V
+ <EM>curses</EM>), it was problematic because <EM>ncurses</EM> did not allow a reliable
+ way to cleanup on receiving <STRONG>SIGTSTP</STRONG>.
+
+ The current version (ncurses6) uses output buffers managed directly by
+ <EM>ncurses.</EM> Some of the low-level functions described in this manual page
+ write to the standard output. They are not signal-safe. The high-
+ level functions in <EM>ncurses</EM> employ alternate versions of these functions
+ using the more reliable buffering scheme.
+
+
+</PRE><H3><a name="h3-Function-Prototypes">Function Prototypes</a></H3><PRE>
+ The X/Open Curses prototypes are based on the SVr4 <EM>curses</EM> header
+ declarations, which were defined at the same time the C language was
+ first standardized in the late 1980s.
+ <STRONG>o</STRONG> X/Open Curses uses <EM>const</EM> less effectively than a later design
+ might, in some cases applying it needlessly to values are already
+ constant, and in most cases overlooking parameters which normally
+ would use <EM>const.</EM> Using constant parameters for functions which do
+ not use <EM>const</EM> may prevent the program from compiling. On the other
+ hand, "writable strings" are an obsolescent feature.
+ As an extension, this implementation can be configured to change
+ the function prototypes to use the <EM>const</EM> keyword. The <EM>ncurses</EM> ABI
+ 6 enables this feature by default.
- <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>
+ <STRONG>o</STRONG> X/Open Curses prototypes <STRONG>tparm</STRONG> with a fixed number of parameters,
+ rather than a variable argument list.
+
+ This implementation uses a variable argument list, but can be
+ configured to use the fixed-parameter list. Portable applications
+ should provide 9 parameters after the format; zeroes are fine for
+ this purpose.
+
+ In response to review comments by Thomas E. Dickey, X/Open Curses
+ Issue 7 proposed the <STRONG>tiparm</STRONG> function in mid-2009.
+
+ While <STRONG>tiparm</STRONG> is always provided in <EM>ncurses</EM>, the older form is only
+ available as a build-time configuration option. If not specially
+ configured, <STRONG>tparm</STRONG> is the same as <STRONG>tiparm</STRONG>.
+
+ Both forms of <STRONG>tparm</STRONG> have drawbacks:
+
+ <STRONG>o</STRONG> Most of the calls to <STRONG>tparm</STRONG> use only one or two parameters. Passing
+ nine on each call is awkward.
+
+ Using <EM>long</EM> for the numeric parameter type is a workaround to make
+ the parameter use the same amount of stack as a pointer. That
+ approach dates back to the mid-1980s, before C was standardized.
+ Since then, there is a standard (and pointers are not required to
+ fit in a long).
+
+ <STRONG>o</STRONG> Providing the right number of parameters for a variadic function
+ such as <STRONG>tiparm</STRONG> can be a problem, in particular for string
+ parameters. However, only a few terminfo capabilities use string
+ parameters (e.g., the ones used for programmable function keys).
+
+ The <EM>ncurses</EM> library checks usage of these capabilities, and returns
+ an error if the capability mishandles string parameters. But it
+ cannot check if a calling program provides strings in the right
+ places for the <STRONG>tparm</STRONG> calls.
+
+ The <STRONG><A HREF="tput.1.html">tput(1)</A></STRONG> program checks its use of these capabilities with a
+ table, so that it calls <STRONG>tparm</STRONG> correctly.
+
+ <STRONG>Special</STRONG> <EM>TERM</EM> <STRONG>treatment</STRONG>
+ If configured to use the terminal-driver, e.g., for the MinGW port,
+
+ <STRONG>o</STRONG> <STRONG>setupterm</STRONG> interprets a missing/empty <EM>TERM</EM> variable as the special
+ value "unknown".
+
+ SVr4 curses uses the special value "dumb".
+
+ The difference between the two is that the former uses the <STRONG>gn</STRONG> (-
+ <STRONG>generic_type</STRONG>) terminfo capability, while the latter does not. A
+ generic terminal is unsuitable for full-screen applications.
+
+ <STRONG>o</STRONG> <STRONG>setupterm</STRONG> allows explicit use of the the windows console driver by
+ checking if <STRONG>$TERM</STRONG> is set to "#win32con" or an abbreviation of that
+ string.
+
+
+</PRE><H3><a name="h3-Other-Portability-Issues">Other Portability Issues</a></H3><PRE>
+ In SVr4, <STRONG>set_curterm</STRONG> returns an <EM>int,</EM> <STRONG>OK</STRONG> or <STRONG>ERR</STRONG>. We have chosen to
+ implement the X/Open Curses semantics.
+
+ In SVr4, the third argument of <STRONG>tputs</STRONG> has the type "<STRONG>int</STRONG> <STRONG>(*putc)(char)</STRONG>".
+
+ At least one implementation of X/Open Curses (Solaris) returns a value
+ other than <STRONG>OK</STRONG> or <STRONG>ERR</STRONG> from <STRONG>tputs</STRONG>. It instead returns the length of the
+ string, and does no error checking.
+
+ X/Open Curses notes that after calling <STRONG>mvcur</STRONG>, the <EM>curses</EM> state may not
+ match the actual terminal state, and that an application should touch
+ and refresh the window before resuming normal <EM>curses</EM> calls. Both
+ <EM>ncurses</EM> and SVr4 <EM>curses</EM> implement <STRONG>mvcur</STRONG> using the <EM>SCREEN</EM> data allocated
+ in either <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG>. So though it is documented as a <EM>terminfo</EM>
+ function, <STRONG>mvcur</STRONG> is really a <EM>curses</EM> function that is not well specified.
+
+ X/Open notes that after calling <STRONG>mvcur</STRONG>, the curses state may not match
+ the actual terminal state, and that an application should touch and
+ refresh the window before resuming normal curses calls. Both <EM>ncurses</EM>
+ and System V Release 4 curses implement <STRONG>mvcur</STRONG> using the <EM>SCREEN</EM> data
+ allocated in either <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG>. So though it is documented as
+ a terminfo function, <STRONG>mvcur</STRONG> is really a curses function which is not
+ well specified.
+
+ X/Open Curses states that the old location must be given for <STRONG>mvcur</STRONG> to
+ accommodate terminals that lack absolute cursor positioning. <EM>ncurses</EM>
+ allows the caller to use -1 for either or both old coordinates. The -1
+ tells <EM>ncurses</EM> that the old location is unknown, and that it must use
+ only absolute motion (such as <EM>cursor</EM><STRONG>_</STRONG><EM>address</EM>) rather than the least
+ costly combination of absolute and relative motion.
+
+
+</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
+ SVr2 (1984) introduced the <EM>terminfo</EM> feature. Its programming manual
+ mentioned the following low-level functions.
+
+ <STRONG>Function</STRONG> <STRONG>Description</STRONG>
+ ------------------------------------------------------------------------
+ <STRONG>fixterm</STRONG> restore tty to "in curses" state
+ <STRONG>gettmode</STRONG> establish current tty modes
+ <STRONG>mvcur</STRONG> low level cursor motion
+ <STRONG>putp</STRONG> use <STRONG>tputs</STRONG> to send characters via <EM>putchar</EM>
+ <STRONG>resetterm</STRONG> set tty modes to "out of curses" state
+ <STRONG>resetty</STRONG> reset tty flags to stored value
+ <STRONG>saveterm</STRONG> save current modes as "in curses" state
+ <STRONG>savetty</STRONG> store current tty flags
+ <STRONG>setterm</STRONG> establish terminal with given type
+ <STRONG>setupterm</STRONG> establish terminal with given type
+ <STRONG>tparm</STRONG> interpolate parameters into string capability
+ <STRONG>tputs</STRONG> apply padding information to a string
+ <STRONG>vidattr</STRONG> like <STRONG>vidputs</STRONG>, but output through <EM>putchar</EM>
+ <STRONG>vidputs</STRONG> write string to terminal, applying specified attributes
+
+ The programming manual also mentioned functions provided for <EM>termcap</EM>
+ compatibility (commenting that they "may go away at a later date").
+
+ <STRONG>Function</STRONG> <STRONG>Description</STRONG>
+ ------------------------------------------------------------------------
+ <STRONG>tgetent</STRONG> look up <EM>termcap</EM> entry for given <EM>name</EM>
+ <STRONG>tgetflag</STRONG> get Boolean entry for given <EM>id</EM>
+ <STRONG>tgetnum</STRONG> get numeric entry for given <EM>id</EM>
+ <STRONG>tgetstr</STRONG> get string entry for given <EM>id</EM>
+ <STRONG>tgoto</STRONG> apply parameters to given capability
+ <STRONG>tputs</STRONG> write characters via a function parameter, applying padding
+
+ Early <EM>terminfo</EM> programs obtained capability values from the <EM>TERMINAL</EM>
+ structure initialized by <STRONG>setupterm</STRONG>.
+
+ SVr3 (1987) extended <EM>terminfo</EM> by adding functions to retrieve
+ capability values (like the <EM>termcap</EM> interface), and reusing <STRONG>tgoto</STRONG> and
+ <STRONG>tputs</STRONG>.
+
+ <STRONG>Function</STRONG> <STRONG>Description</STRONG>
+ ------------------------------------------------------------------------
+ <STRONG>tigetflag</STRONG> get Boolean entry for given <EM>id</EM>
+ <STRONG>tigetnum</STRONG> get numeric entry for given <EM>id</EM>
+ <STRONG>tigetstr</STRONG> get string entry for given <EM>id</EM>
+
+ SVr3 also replaced several of the SVr2 <EM>terminfo</EM> functions that had no
+ counterpart in the <EM>termcap</EM> interface, documenting them as obsolete.
+
+ <STRONG>Function</STRONG> <STRONG>Replaced</STRONG> <STRONG>by</STRONG>
+ ------------------------------------------------------------------------
+ crmode cbreak
+ fixterm reset_prog_mode
+ gettmode <EM>n/a</EM>
+ nocrmode nocbreak
+ resetterm reset_shell_mode
+ saveterm def_prog_mode
+ setterm setupterm
+
+ SVr3 kept the <STRONG>mvcur</STRONG>, <STRONG>vidattr</STRONG>, and <STRONG>vidputs</STRONG> functions, along with <STRONG>putp</STRONG>,
+ <STRONG>tparm</STRONG>, and <STRONG>tputs</STRONG>. The latter were needed to support padding, and to
+ handle capabilities accessed by functions such as <STRONG>vidattr</STRONG> (which used
+ more than the two parameters supported by <STRONG>tgoto</STRONG>).
+
+ SVr3 introduced the functions for switching between terminal
+ descriptions; for example, <STRONG>set_curterm</STRONG>. Some changes reflected
+ incremental improvements to the SVr2 library.
+
+ <STRONG>o</STRONG> The <EM>TERMINAL</EM> type definition was introduced in SVr3.01, for the
+ <EM>term</EM> structure provided in SVr2.
+
+ <STRONG>o</STRONG> Various global variables such as <STRONG>boolnames</STRONG> were mentioned in the
+ programming manual at this point, though the variables had been
+ provided in SVr2.
+
+ SVr4 (1989) added the <STRONG>vid_attr</STRONG> and <STRONG>vid_puts</STRONG> functions.
+
+ Other low-level functions are declared in the <EM>curses</EM> header files of
+ Unix systems, but none are documented. Those noted as "obsolete" by
+ SVr3 remained in use by System V's <STRONG>vi(1)</STRONG> editor.
+
+
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>, <STRONG><A HREF="curs_memleaks.3x.html">curs_memleaks(3x)</A></STRONG>,
+ <STRONG><A HREF="curs_termcap.3x.html">curs_termcap(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>, <STRONG>putc(3)</STRONG>, <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>,
+ <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
+
+
+
+ncurses 6.4 2023-12-30 <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>
</PRE>
-<HR>
-<ADDRESS>
-Man(1) output converted with
-<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
-</ADDRESS>
+<div class="nav">
+<ul>
+<li><a href="#h2-NAME">NAME</a></li>
+<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
+<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
+<ul>
+<li><a href="#h3-Initialization">Initialization</a></li>
+<li><a href="#h3-The-Terminal-State">The Terminal State</a></li>
+<li><a href="#h3-Formatting-Output">Formatting Output</a></li>
+<li><a href="#h3-Output-Functions">Output Functions</a></li>
+<li><a href="#h3-Terminal-Capability-Functions">Terminal Capability Functions</a></li>
+<li><a href="#h3-Terminal-Capability-Names">Terminal Capability Names</a></li>
+<li><a href="#h3-Releasing-Memory">Releasing Memory</a></li>
+</ul>
+</li>
+<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-NOTES">NOTES</a></li>
+<li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
+<li><a href="#h2-PORTABILITY">PORTABILITY</a>
+<ul>
+<li><a href="#h3-Compatibility-Macros">Compatibility Macros</a></li>
+<li><a href="#h3-Legacy-Data">Legacy Data</a></li>
+<li><a href="#h3-Output-Buffering">Output Buffering</a></li>
+<li><a href="#h3-Function-Prototypes">Function Prototypes</a></li>
+<li><a href="#h3-Other-Portability-Issues">Other Portability Issues</a></li>
+</ul>
+</li>
+<li><a href="#h2-HISTORY">HISTORY</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
+</ul>
+</div>
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