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Diffstat (limited to 'libX11/man/XSetErrorHandler.man')
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diff --git a/libX11/man/XSetErrorHandler.man b/libX11/man/XSetErrorHandler.man new file mode 100644 index 000000000..5ccf3a91b --- /dev/null +++ b/libX11/man/XSetErrorHandler.man @@ -0,0 +1,276 @@ +.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium +.\" +.\" 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, 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 X CONSORTIUM 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 of the X Consortium shall +.\" not be used in advertising or otherwise to promote the sale, use or +.\" other dealings in this Software without prior written authorization +.\" from the X Consortium. +.\" +.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by +.\" Digital Equipment Corporation +.\" +.\" Portions Copyright \(co 1990, 1991 by +.\" Tektronix, Inc. +.\" +.\" Permission to use, copy, modify and distribute this documentation for +.\" any purpose and without fee is hereby granted, provided that the above +.\" copyright notice appears in all copies and that both that copyright notice +.\" and this permission notice appear in all copies, and that the names of +.\" Digital and Tektronix not be used in in advertising or publicity pertaining +.\" to this documentation without specific, written prior permission. +.\" Digital and Tektronix makes no representations about the suitability +.\" of this documentation for any purpose. +.\" It is provided ``as is'' without express or implied warranty. +.\" +.\" $XFree86: xc/doc/man/X11/XSeErrHan.man,v 1.2 2001/01/27 18:20:04 dawes Exp $ +.\" +.ds xT X Toolkit Intrinsics \- C Language Interface +.ds xW Athena X Widgets \- C Language X Toolkit Interface +.ds xL Xlib \- C Language X Interface +.ds xC Inter-Client Communication Conventions Manual +.na +.de Ds +.nf +.\\$1D \\$2 \\$1 +.ft 1 +.\".ps \\n(PS +.\".if \\n(VS>=40 .vs \\n(VSu +.\".if \\n(VS<=39 .vs \\n(VSp +.. +.de De +.ce 0 +.if \\n(BD .DF +.nr BD 0 +.in \\n(OIu +.if \\n(TM .ls 2 +.sp \\n(DDu +.fi +.. +.de FD +.LP +.KS +.TA .5i 3i +.ta .5i 3i +.nf +.. +.de FN +.fi +.KE +.LP +.. +.de IN \" send an index entry to the stderr +.. +.de C{ +.KS +.nf +.D +.\" +.\" choose appropriate monospace font +.\" the imagen conditional, 480, +.\" may be changed to L if LB is too +.\" heavy for your eyes... +.\" +.ie "\\*(.T"480" .ft L +.el .ie "\\*(.T"300" .ft L +.el .ie "\\*(.T"202" .ft PO +.el .ie "\\*(.T"aps" .ft CW +.el .ft R +.ps \\n(PS +.ie \\n(VS>40 .vs \\n(VSu +.el .vs \\n(VSp +.. +.de C} +.DE +.R +.. +.de Pn +.ie t \\$1\fB\^\\$2\^\fR\\$3 +.el \\$1\fI\^\\$2\^\fP\\$3 +.. +.de ZN +.ie t \fB\^\\$1\^\fR\\$2 +.el \fI\^\\$1\^\fP\\$2 +.. +.de hN +.ie t <\fB\\$1\fR>\\$2 +.el <\fI\\$1\fP>\\$2 +.. +.de NT +.ne 7 +.ds NO Note +.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2 +.if \\n(.$ .if !'\\$1'C' .ds NO \\$1 +.ie n .sp +.el .sp 10p +.TB +.ce +\\*(NO +.ie n .sp +.el .sp 5p +.if '\\$1'C' .ce 99 +.if '\\$2'C' .ce 99 +.in +5n +.ll -5n +.R +.. +. \" Note End -- doug kraft 3/85 +.de NE +.ce 0 +.in -5n +.ll +5n +.ie n .sp +.el .sp 10p +.. +.ny0 +.TH XSetErrorHandler __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS" +.SH NAME +XSetErrorHandler, XGetErrorText, XDisplayName, XSetIOErrorHandler, XGetErrorDatabaseText \- default error handlers +.SH SYNTAX +.HP +int (*XSetErrorHandler\^(\^int (\^*\^\fIhandler\fP\^)\^(Display *, XErrorEvent +*)\^)\^)\^(\^); +.HP +int XGetErrorText\^(\^Display *\fIdisplay\fP\^, int \fIcode\fP\^, char +*\fIbuffer_return\fP\^, int \fIlength\fP\^); +.HP +char *XDisplayName\^(\^char *\fIstring\fP\^); +.HP +int (*XSetIOErrorHandler\^(\^int (\^*\^\fIhandler\fP\^)(Display +*)\^)\^)\^(\^); +.HP +int XGetErrorDatabaseText\^(\^Display *\fIdisplay\fP\^, char *\fIname\fP, char +*\fImessage\fP\^, char *\fIdefault_string\fP\^, char *\fIbuffer_return\fP\^, +int \fIlength\fP\^); +.SH ARGUMENTS +.IP \fIbuffer_return\fP 1i +Returns the error description. +.IP \fIcode\fP 1i +Specifies the error code for which you want to obtain a description. +.IP \fIdefault_string\fP 1i +Specifies the default error message if none is found in the database. +.IP \fIdisplay\fP 1i +Specifies the connection to the X server. +.IP \fIhandler\fP 1i +Specifies the program's supplied error handler. +.IP \fIlength\fP 1i +Specifies the size of the buffer. +.IP \fImessage\fP 1i +Specifies the type of the error message. +.IP \fIname\fP 1i +Specifies the name of the application. +.IP \fIstring\fP 1i +Specifies the character string. +.SH DESCRIPTION +Xlib generally calls the program's +supplied error handler whenever an error is received. +It is not called on +.ZN BadName +errors from +.ZN OpenFont , +.ZN LookupColor , +or +.ZN AllocNamedColor +protocol requests or on +.ZN BadFont +errors from a +.ZN QueryFont +protocol request. +These errors generally are reflected back to the program through the +procedural interface. +Because this condition is not assumed to be fatal, +it is acceptable for your error handler to return; +the returned value is ignored. +However, the error handler should not +call any functions (directly or indirectly) on the display +that will generate protocol requests or that will look for input events. +The previous error handler is returned. +.LP +The +.ZN XGetErrorText +function copies a null-terminated string describing the specified error code +into the specified buffer. +The returned text is in the encoding of the current locale. +It is recommended that you use this function to obtain an error description +because extensions to Xlib may define their own error codes +and error strings. +.LP +The +.ZN XDisplayName +function returns the name of the display that +.ZN XOpenDisplay +would attempt to use. +If a NULL string is specified, +.ZN XDisplayName +looks in the environment for the display and returns the display name that +.ZN XOpenDisplay +would attempt to use. +This makes it easier to report to the user precisely which display the +program attempted to open when the initial connection attempt failed. +.LP +The +.ZN XSetIOErrorHandler +sets the fatal I/O error handler. +Xlib calls the program's supplied error handler if any sort of system call +error occurs (for example, the connection to the server was lost). +This is assumed to be a fatal condition, +and the called routine should not return. +If the I/O error handler does return, +the client process exits. +.LP +Note that the previous error handler is returned. +.LP +The +.ZN XGetErrorDatabaseText +function returns a null-terminated message +(or the default message) from the error message +database. +Xlib uses this function internally to look up its error messages. +The text in the default_string argument is assumed +to be in the encoding of the current locale, +and the text stored in the buffer_return argument +is in the encoding of the current locale. +.LP +The name argument should generally be the name of your application. +The message argument should indicate which type of error message you want. +If the name and message are not in the Host Portable Character Encoding, +the result is implementation-dependent. +Xlib uses three predefined ``application names'' to report errors. +In these names, +uppercase and lowercase matter. +.IP XProtoError 1i +The protocol error number is used as a string for the message argument. +.IP XlibMessage 1i +These are the message strings that are used internally by the library. +.IP XRequest 1i +For a core protocol request, +the major request protocol number is used for the message argument. +For an extension request, +the extension name (as given by +.ZN InitExtension ) +followed by a period (\.) and the minor request protocol number +is used for the message argument. +If no string is found in the error database, +the default_string is returned to the buffer argument. +.SH "SEE ALSO" +XOpenDisplay(3X11), +XSynchronize(3X11) +.br +\fI\*(xL\fP |