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+<TITLE>curs_trace 3x</TITLE>
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+<H1 class="no-header">curs_trace 3x</H1>
 <PRE>
 <PRE>
-<!-- Manpage converted by man2html 3.0.1 -->
+<STRONG><A HREF="curs_trace.3x.html">curs_trace(3x)</A></STRONG>                                           <STRONG><A HREF="curs_trace.3x.html">curs_trace(3x)</A></STRONG>
 
 
-</PRE>
-<H2>NAME</H2><PRE>
-       <B>_tracef</B>,      <B>_tracedump</B>,     <B>_traceattr</B>,     <B>_traceattr2</B>,
-       <B>_nc_tracebits</B>,  <B>_tracechar</B>,  <B>_tracechtype</B>,  <B>_tracechtype2</B>,
-       <B>_tracemouse</B>, <B>trace</B> - <B>curses</B> debugging routines
 
 
 
 
-</PRE>
-<H2>SYNOPSIS</H2><PRE>
-       <B>#include</B> <B>&lt;curses.h&gt;</B>
-       <B>void</B> <B>_tracef(const</B> <B>char</B> <B>*format,</B> <B>...);</B>
-       <B>void</B> <B>_tracedump(const</B> <B>char</B> <B>*label,</B> <B>WINDOW</B> <B>*win);</B>
-       <B>char</B> <B>*_traceattr(attr_t</B> <B>attr);</B>
-       <B>char</B> <B>*_traceattr2(int</B> <B>buffer,</B> <B>chtype</B> <B>ch);</B>
-       <B>char</B> <B>*_nc_tracebits(void);</B>
-       <B>char</B> <B>*_tracechar(const</B> <B>unsigned</B> <B>char</B> <B>ch);</B>
-       <B>char</B> <B>*_tracechtype(chtype</B> <B>ch);</B>
-       <B>char</B> <B>*_tracechtype2(int</B> <B>buffer,</B> <B>chtype</B> <B>ch);</B>
-       <B>char</B> <B>*_tracemouse(const</B> <B>MEVENT</B> <B>*event);</B>
-       <B>void</B> <B>trace(const</B> <B>unsigned</B> <B>int</B> <B>param);</B>
 
 
+</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
+       <STRONG>trace</STRONG>, <STRONG>_tracef</STRONG>, <STRONG>_traceattr</STRONG>, <STRONG>_traceattr2</STRONG>, <STRONG>_tracecchar_t</STRONG>,
+       <STRONG>_tracecchar_t2</STRONG>, <STRONG>_tracechar</STRONG>, <STRONG>_tracechtype</STRONG>, <STRONG>_tracechtype2</STRONG>,
+       <STRONG>_nc_tracebits</STRONG>, <STRONG>_tracedump</STRONG>, <STRONG>_tracemouse</STRONG> - <STRONG>curses</STRONG> debugging
+       routines
 
 
-</PRE>
-<H2>DESCRIPTION</H2><PRE>
-       The  <B>trace</B>  routines  are  used  for debugging the ncurses
-       libraries, as well as applications which use  the  ncurses
-       libraries.   These  functions  are normally available only
-       with the debugging library <I>libncurses</I><B>_</B><I>g.a</I>, but may be com-
-       piled into any model (shared, static, profile) by defining
-       the symbol <B>TRACE</B>.
-
-       The principal parts of this interface are the  <B>trace</B>  rou-
-       tine which selectively enables different tracing features,
-       and the <B>_tracef</B> routine which writes formatted data to the
-       <I>trace</I> file.
-
-       Calling  <B>trace</B>  with  a  nonzero  parameter opens the file
-       <B>trace</B> in the current directory for output.  The  parameter
-       is formed by OR'ing values from the list of <B>TRACE_</B><I>xxx</I> def-
-       initions in <B>&lt;curses.h&gt;</B>.  These include:
-
-       TRACE_DISABLE
-            turn off tracing.
-
-       TRACE_TIMES
+
+</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
+       <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
+
+       <STRONG>void</STRONG> <STRONG>trace(const</STRONG> <STRONG>unsigned</STRONG> <STRONG>int</STRONG> <EM>param</EM><STRONG>);</STRONG>
+
+       <STRONG>void</STRONG> <STRONG>_tracef(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>format</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
+
+       <STRONG>char</STRONG> <STRONG>*_traceattr(attr_t</STRONG> <EM>attr</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_traceattr2(int</STRONG> <EM>buffer</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_tracecchar_t(const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>string</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_tracecchar_t2(int</STRONG> <EM>buffer</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>string</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_tracechar(int</STRONG> <EM>ch</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_tracechtype(chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_tracechtype2(int</STRONG> <EM>buffer</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
+
+       <STRONG>void</STRONG> <STRONG>_tracedump(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>label</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_nc_tracebits(void);</STRONG>
+       <STRONG>char</STRONG> <STRONG>*_tracemouse(const</STRONG> <STRONG>MEVENT</STRONG> <STRONG>*</STRONG><EM>event</EM><STRONG>);</STRONG>
+
+
+</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+       The <STRONG>trace</STRONG> routines are used for debugging the ncurses  li-
+       braries, as well as applications which use the ncurses li-
+       braries.  These functions are normally available only with
+       the  debugging  library  e.g.,  <EM>libncurses</EM><STRONG>_</STRONG><EM>g.a</EM>, but may be
+       compiled into  any  model  (shared,  static,  profile)  by
+       defining  the  symbol <STRONG>TRACE</STRONG>.  Additionally, some functions
+       are only available with the  wide-character  configuration
+       of the libraries.
+
+
+</PRE><H3><a name="h3-Functions">Functions</a></H3><PRE>
+       The principal parts of this interface are
+
+       <STRONG>o</STRONG>   <STRONG>trace</STRONG>,  which  selectively  enables  different tracing
+           features, and
+
+       <STRONG>o</STRONG>   <STRONG>_tracef</STRONG>, which writes  formatted  data  to  the  <EM>trace</EM>
+           file.
+
+       Calling  <STRONG>trace</STRONG>  with  a nonzero parameter creates the file
+       <STRONG>trace</STRONG> in the current directory for output.   If  the  file
+       already exists, no tracing is done.
+
+       The  other  functions either return a pointer to a string-
+       area (allocated by the corresponding function), or  return
+       no  value (such as <STRONG>_tracedump</STRONG>, which implements the screen
+       dump for <STRONG>TRACE_UPDATE</STRONG>).  The caller should not free  these
+       strings,  since  the  allocation  is  reused on successive
+       calls.  To work around the problem of a single string-area
+       per  function, some use a buffer-number parameter, telling
+       the library to allocate additional string-areas.
+
+
+</PRE><H3><a name="h3-Trace-Parameter">Trace Parameter</a></H3><PRE>
+       The trace parameter is formed by OR'ing  values  from  the
+       list  of  <STRONG>TRACE_</STRONG><EM>xxx</EM>  definitions in <STRONG>&lt;curses.h&gt;</STRONG>.  These in-
+       clude:
+
+       <STRONG>TRACE_DISABLE</STRONG>
+            turn off tracing by passing a zero parameter.
+
+            The library flushes the output file, but  retains  an
+            open file-descriptor to the trace file so that it can
+            resume tracing later if a nonzero parameter is passed
+            to the <STRONG>trace</STRONG> function.
+
+       <STRONG>TRACE_TIMES</STRONG>
             trace user and system times of updates.
 
             trace user and system times of updates.
 
-       TRACE_TPUTS
-            trace tputs calls.
+       <STRONG>TRACE_TPUTS</STRONG>
+            trace <STRONG><A HREF="curs_terminfo.3x.html">tputs(3x)</A></STRONG> calls.
 
 
-       TRACE_UPDATE
+       <STRONG>TRACE_UPDATE</STRONG>
             trace update actions, old &amp; new screens.
 
             trace update actions, old &amp; new screens.
 
-       TRACE_MOVE
+       <STRONG>TRACE_MOVE</STRONG>
             trace cursor movement and scrolling.
 
             trace cursor movement and scrolling.
 
-       TRACE_CHARPUT
+       <STRONG>TRACE_CHARPUT</STRONG>
             trace all character outputs.
 
             trace all character outputs.
 
-       TRACE_ORDINARY
-            trace all update actions.  The  old  and  new  screen
-            contents  are  written  to  the  trace  file for each
-            refresh.
+       <STRONG>TRACE_ORDINARY</STRONG>
+            trace  all  update  actions.   The old and new screen
+            contents are written to the trace file for  each  re-
+            fresh.
 
 
-       TRACE_CALLS
+       <STRONG>TRACE_CALLS</STRONG>
             trace all curses calls.  The parameters for each call
             are traced, as well as return values.
 
             trace all curses calls.  The parameters for each call
             are traced, as well as return values.
 
-       TRACE_VIRTPUT
-            trace virtual character puts, i.e., calls to <B>addch</B>.
+       <STRONG>TRACE_VIRTPUT</STRONG>
+            trace virtual character puts, i.e., calls to <STRONG>addch</STRONG>.
 
 
-       TRACE_IEVENT
+       <STRONG>TRACE_IEVENT</STRONG>
             trace low-level input processing, including timeouts.
 
             trace low-level input processing, including timeouts.
 
-       TRACE_BITS
+       <STRONG>TRACE_BITS</STRONG>
             trace state of TTY control bits.
 
             trace state of TTY control bits.
 
-       TRACE_ICALLS
+       <STRONG>TRACE_ICALLS</STRONG>
             trace internal/nested calls.
 
             trace internal/nested calls.
 
-       TRACE_CCALLS
+       <STRONG>TRACE_CCALLS</STRONG>
             trace per-character calls.
 
             trace per-character calls.
 
-       TRACE_DATABASE
+       <STRONG>TRACE_DATABASE</STRONG>
             trace read/write of terminfo/termcap data.
 
             trace read/write of terminfo/termcap data.
 
-       TRACE_MAXIMUM
+       <STRONG>TRACE_ATTRS</STRONG>
+            trace changes to video attributes and colors.
+
+       <STRONG>TRACE_MAXIMUM</STRONG>
             maximum trace level,  enables  all  of  the  separate
             trace features.
 
             maximum trace level,  enables  all  of  the  separate
             trace features.
 
-            Some  tracing features are enabled whenever the <B>trace</B>
-            parameter is nonzero.  Some  features  overlap.   The
-            specific names are used as a guideline.
+       Some  tracing  features are enabled whenever the <STRONG>trace</STRONG> pa-
+       rameter is nonzero.  Some features overlap.  The  specific
+       names are used as a guideline.
 
 
 
 
-</PRE>
-<H2>RETURN VALUE</H2><PRE>
-       Routines  which  return a value are designed to be used as
-       parameters to the <B>_tracef</B> routine.
+</PRE><H3><a name="h3-Initialization">Initialization</a></H3><PRE>
+       These  functions check the <STRONG>NCURSES_TRACE</STRONG> environment vari-
+       able, to set the tracing feature as if <STRONG>trace</STRONG> was called:
 
 
+           filter, initscr, new_prescr, newterm, nofilter,
+           restartterm, ripoffline, setupterm, slk_init, tgetent,
+           use_env, use_extended_names, use_tioctl
 
 
-</PRE>
-<H2>PORTABILITY</H2><PRE>
-       These functions are not part of the XSI  interface.   Some
-       other  curses  implementations  are known to have similar,
-       undocumented features, but they are  not  compatible  with
-       ncurses.
 
 
+</PRE><H3><a name="h3-Command-line-Utilities">Command-line Utilities</a></H3><PRE>
+       The command-line utilities such as <STRONG><A HREF="tic.1m.html">tic(1)</A></STRONG> provide  a  ver-
+       bose  option which extends the set of messages written us-
+       ing the <STRONG>trace</STRONG> function.  Both of these (<STRONG>-v</STRONG> and <STRONG>trace</STRONG>)  use
+       the same variable (<STRONG>_nc_tracing</STRONG>), which determines the mes-
+       sages which are written.
 
 
-</PRE>
-<H2>SEE ALSO</H2><PRE>
-       <B><A HREF="ncurses.3x.html">curses(3x)</A></B>.
+       Because the command-line utilities may call initialization
+       functions   such  as  <STRONG>setupterm</STRONG>,  <STRONG>tgetent</STRONG>  or  <STRONG>use_extend-</STRONG>
+       <STRONG>ed_names</STRONG>, some of their debugging output may  be  directed
+       to  the  <EM>trace</EM> file if the <STRONG>NCURSES_TRACE</STRONG> environment vari-
+       able is set:
+
+       <STRONG>o</STRONG>   messages produced in the utility are  written  to  the
+           standard error.
+
+       <STRONG>o</STRONG>   messages  produced by the underlying library are writ-
+           ten to <EM>trace</EM>.
+
+       If ncurses is built without tracing, none  of  the  latter
+       are  produced,  and  fewer diagnostics are provided by the
+       command-line utilities.
+
+
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+       Routines which return a value are designed to be  used  as
+       parameters to the <STRONG>_tracef</STRONG> routine.
+
+
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+       These  functions  are not part of the XSI interface.  Some
+       other curses implementations are known  to  have  similar,
+       undocumented  features,  but  they are not compatible with
+       ncurses.
 
 
+       A few functions are not provided when symbol versioning is
+       used:
 
 
+           _nc_tracebits, _tracedump, _tracemouse
 
 
 
 
+</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_trace.3x.html">curs_trace(3x)</A></STRONG>
 </PRE>
 </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-Functions">Functions</a></li>
+<li><a href="#h3-Trace-Parameter">Trace Parameter</a></li>
+<li><a href="#h3-Initialization">Initialization</a></li>
+<li><a href="#h3-Command-line-Utilities">Command-line Utilities</a></li>
+</ul>
+</li>
+<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
+</ul>
+</div>
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