- filter, initscr, new_prescr, newterm, nofilter,
- restartterm, ripoffline, setupterm, slk_init, tgetent,
- use_env, use_extended_names, use_tioctl
+ filter, initscr, new_prescr, newterm, nofilter, restartterm,
+ ripoffline, setupterm, slk_init, tgetent, use_env,
+ use_extended_names, use_tioctl
+
+
+</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 verbose option
+ which extends the set of messages written using 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 messages which are written.
+
+ Because the command-line utilities may call initialization functions
+ such as <STRONG>setupterm</STRONG>, <STRONG>tgetent</STRONG> or <STRONG>use_extended_names</STRONG>, some of their debug-
+ ging output may be directed to the <EM>trace</EM> file if the <STRONG>NCURSES_TRACE</STRONG> en-
+ vironment variable 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 written 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.