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Diffstat (limited to 'upstream/fedora-rawhide/man3/curs_trace.3x')
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1 files changed, 285 insertions, 0 deletions
diff --git a/upstream/fedora-rawhide/man3/curs_trace.3x b/upstream/fedora-rawhide/man3/curs_trace.3x new file mode 100644 index 00000000..2a55275c --- /dev/null +++ b/upstream/fedora-rawhide/man3/curs_trace.3x @@ -0,0 +1,285 @@ +.\"*************************************************************************** +.\" Copyright 2019-2022,2023 Thomas E. Dickey * +.\" Copyright 2000-2016,2017 Free Software Foundation, Inc. * +.\" * +.\" Permission is hereby granted, free of charge, to any person obtaining a * +.\" copy of this software and associated documentation files (the * +.\" "Software"), to deal in the Software without restriction, including * +.\" without limitation the rights to use, copy, modify, merge, publish, * +.\" distribute, distribute with modifications, sublicense, and/or sell * +.\" copies of the Software, and to permit persons to whom the Software is * +.\" furnished to do so, subject to the following conditions: * +.\" * +.\" The above copyright notice and this permission notice shall be included * +.\" in all copies or substantial portions of the Software. * +.\" * +.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * +.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * +.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * +.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * +.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * +.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * +.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. * +.\" * +.\" Except as contained in this notice, the name(s) of the above copyright * +.\" holders shall not be used in advertising or otherwise to promote the * +.\" sale, use or other dealings in this Software without prior written * +.\" authorization. * +.\"*************************************************************************** +.\" +.\" $Id: curs_trace.3x,v 1.42 2023/12/23 16:08:25 tom Exp $ +.TH curs_trace 3X 2023-12-23 "ncurses 6.4" "Library calls" +.ie \n(.g \{\ +.ds `` \(lq +.ds '' \(rq +.\} +.el \{\ +.ie t .ds `` `` +.el .ds `` "" +.ie t .ds '' '' +.el .ds '' "" +.\} +. +.de bP +.ie n .IP \(bu 4 +.el .IP \(bu 2 +.. +.SH NAME +\fB\%curses_trace\fP, +\fB\%trace\fP, +\fB\%_tracef\fP, +\fB\%_traceattr\fP, +\fB\%_traceattr2\fP, +\fB\%_tracecchar_t\fP, +\fB\%_tracecchar_t2\fP, +\fB\%_tracechar\fP, +\fB\%_tracechtype\fP, +\fB\%_tracechtype2\fP, +\fB\%_nc_tracebits\fP, +\fB\%_tracedump\fP, +\fB\%_tracemouse\fP \- +\fIcurses\fR debugging routines +.SH SYNOPSIS +.nf +\fB#include <curses.h> +.PP +\fBunsigned curses_trace(const unsigned \fIparam\fP); +.PP +\fBvoid _tracef(const char *\fIformat\fP, ...); +.PP +\fBchar *_traceattr(attr_t \fIattr\fP); +\fBchar *_traceattr2(int \fIbuffer\fP, chtype \fIch\fP); +\fBchar *_tracecchar_t(const cchar_t *\fIstring\fP); +\fBchar *_tracecchar_t2(int \fIbuffer\fP, const cchar_t *\fIstring\fP); +\fBchar *_tracechar(int \fIch\fP); +\fBchar *_tracechtype(chtype \fIch\fP); +\fBchar *_tracechtype2(int \fIbuffer\fP, chtype \fIch\fP); +.PP +\fBvoid _tracedump(const char *\fIlabel\fP, WINDOW *\fIwin\fP); +\fBchar *_nc_tracebits(void); +\fBchar *_tracemouse(const MEVENT *\fIevent\fP); +.PP +\fI/* deprecated */\fP +\fBvoid trace(const unsigned int \fIparam\fP); +.fi +.SH DESCRIPTION +The \fIcurses trace\fP routines are used for debugging the +\fI\%ncurses\fP libraries, +as well as applications which use the \fI\%ncurses\fP libraries. +Some limitations apply: +.bP +Aside from \fBcurses_trace\fP, +the other functions are normally available only with the debugging library +e.g., \fBlibncurses_g.a\fP. +.IP +All of the trace functions may be compiled into any model (shared, static, +profile) by defining the symbol \fBTRACE\fP. +.bP +Additionally, the functions which use \fBcchar_t\fP +are only available with the wide-character configuration of the libraries. +.SS Functions +The principal parts of this interface are +.bP +\fBcurses_trace\fP, which selectively enables different tracing features, and +.bP +\fB_tracef\fP, which writes formatted data to the \fItrace\fP file. +.IP +The other functions either return a pointer to a string-area +(allocated by the corresponding function), or return no value +(such as \fB_tracedump\fP, +which implements the screen dump for \fBTRACE_UPDATE\fP). +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. +.PP +The \fBcurses_trace\fP function is always available, +whether or not the other trace functions are available: +.bP +If tracing is available, +calling \fBcurses_trace\fP with a nonzero parameter +updates the trace mask, +and returns the previous trace mask. +.IP +When the trace mask is nonzero, +\fI\%ncurses\fP creates the file \*(``trace\*('' in the current directory for output. +If the file already exists, no tracing is done. +.bP +If tracing is not available, \fBcurses_trace\fP returns zero (0). +.SS "Trace Parameter" +The trace parameter is formed by OR'ing +values from the list of \fBTRACE_\fIxxx\fR definitions in \fB<curses.h>\fR. +These include: +.TP 5 +.B TRACE_DISABLE +turn off tracing by passing a zero parameter. +.IP +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 \fBcurses_trace\fP function. +.TP 5 +.B TRACE_TIMES +trace user and system times of updates. +.TP 5 +.B TRACE_TPUTS +trace \fBtputs\fP(3X) calls. +.TP 5 +.B TRACE_UPDATE +trace update actions, old & new screens. +.TP 5 +.B TRACE_MOVE +trace cursor movement and scrolling. +.TP 5 +.B TRACE_CHARPUT +trace all character outputs. +.TP 5 +.B TRACE_ORDINARY +trace all update actions. +The old and new screen contents are written to the trace file +for each refresh. +.TP 5 +.B TRACE_CALLS +trace all curses calls. +The parameters for each call are traced, as well as return values. +.TP 5 +.B TRACE_VIRTPUT +trace virtual character puts, i.e., calls to \fBaddch\fP. +.TP 5 +.B TRACE_IEVENT +trace low-level input processing, including timeouts. +.TP 5 +.B TRACE_BITS +trace state of TTY control bits. +.TP 5 +.B TRACE_ICALLS +trace internal/nested calls. +.TP 5 +.B TRACE_CCALLS +trace per-character calls. +.TP 5 +.B TRACE_DATABASE +trace read/write of terminfo/termcap data. +.TP 5 +.B TRACE_ATTRS +trace changes to video attributes and colors. +.TP 5 +.B TRACE_MAXIMUM +maximum trace level, enables all of the separate trace features. +.PP +Some tracing features are enabled whenever the \fBcurses_trace\fP parameter +is nonzero. +Some features overlap. +The specific names are used as a guideline. +.SS Initialization +These functions check the \fI\%NCURSES_TRACE\fP environment variable, +to set the tracing feature as if \fBcurses_trace\fP was called: +.RS 4 +.PP +filter, +initscr, +new_prescr, +newterm, +nofilter, +restartterm, +ripoffline, +setupterm, +slk_init, +tgetent, +use_env, +use_extended_names, +use_tioctl +.RE +.SS "Command-line Utilities" +The command-line utilities such as \fBtic\fP(1) provide a verbose option +which extends the set of messages written using the \fBcurses_trace\fP function. +Both of these (\fB\-v\fP and \fBcurses_trace\fP) +use the same variable (\fB_nc_tracing\fP), +which determines the messages which are written. +.PP +Because the command-line utilities may call initialization functions +such as \fBsetupterm\fP, \fBtgetent\fP or \fBuse_extended_names\fP, +some of their debugging output may be directed to the \fItrace\fP file +if the \fI\%NCURSES_TRACE\fP environment variable is set: +.bP +messages produced in the utility are written to the standard error. +.bP +messages produced by the underlying library are written to \fItrace\fP. +.PP +If \fI\%ncurses\fP is built without tracing, +none of the latter are produced, +and fewer diagnostics are provided by the command-line utilities. +.SH RETURN VALUE +Routines which return a value are designed to be used as parameters +to the \fB_tracef\fP routine. +.SH PORTABILITY +These functions are not part of the XSI interface. +Some other curses implementations are known to +have similar features, +but they are not compatible with \fI\%ncurses\fP: +.bP +SVr4 provided \fBtraceon\fP and \fBtraceoff\fP, +to control whether debugging information was written +to the \*(``trace\*('' file. +While the functions were always available, +this feature was only enabled +if \fBDEBUG\fP was defined when building the library. +.IP +The SVr4 tracing feature is undocumented. +.bP +PDCurses provides \fBtraceon\fP and \fBtraceoff\fP, +which (like SVr4) are always available, +and enable tracing +to the \*(``trace\*('' file +only when a debug-library is built. +.IP +PDCurses has a short description of these functions, +with a note that they are not present in X/Open Curses, +\fI\%ncurses\fP or NetBSD. +It does not mention SVr4, +but the functions' inclusion in a header file section +labeled \*(``Quasi-standard\*('' hints at the origin. +.bP +NetBSD does not provide functions for enabling/disabling traces. +It uses environment variables +\fI\%CURSES_TRACE_MASK\fP and +\fI\%CURSES_TRACE_FILE\fP to determine what is traced, +and where the results are written. +This is available only when a debug-library is built. +.IP +The NetBSD tracing feature is undocumented. +.PP +A few \fI\%ncurses\fP functions are not provided when symbol versioning +is used: +.RS 4 +.PP +_nc_tracebits, +_tracedump, +_tracemouse +.RE +.PP +The original \fBtrace\fP routine was deprecated because +it often conflicted with application names. +.SH SEE ALSO +\fB\%curses\fP(3X) |