xgeterrortext(3) [hpux man page]

XGetErrorText() 														   XGetErrorText()

Name
  XGetErrorText - obtain a description of error code.

Synopsis
  XGetErrorText(display, code, buffer_return, length)
	Display *display;
	int code;
	char *buffer_return;
	int length;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  code	    Specifies the error code for which you want to obtain a description.

  buffer_return
	    Returns the error description text. You allocate this memory.

  length    Specifies the size of the buffer.

Description
  XGetErrorText()  obtains  textual  descriptions  of errors.  XGetErrorText() copies a NULL-terminated string describing the specified error
  code into the specified buffer with length length.  The returned text is in the encoding of the current locale.  This string is copied from
  static  data	and  therefore	may  be  freed.  This routine allows extensions to the Xlib library to define their own error codes and error
  strings that can be accessed easily.

  For more information, see Volume One, Chapter 3, Basic Window Program.

See Also
  XDisplayName(), XGetErrorDatabaseText(), XSetAfterFunction(), XSetErrorHandler(), XSetIOErrorHandler(), XSynchronize().

Xlib - Error Handling														   XGetErrorText()

XSetErrorHandler(3X11)													    XSetErrorHandler(3X11)

NAME

       XSetErrorHandler, XGetErrorText, XDisplayName, XSetIOErrorHandler, XGetErrorDatabaseText - default error handlers

SYNOPSIS

       int (*XSetErrorHandler(handler))()
	       int (*handler)(Display *, XErrorEvent *)

       XGetErrorText(display, code, buffer_return, length)
	       Display *display;
	       int code;
	       char *buffer_return;
	       int length;

       char *XDisplayName(string)
	       char *string;

       int (*XSetIOErrorHandler(handler))()
	       int (*handler)(Display *);

       XGetErrorDatabaseText(display, name, message, default_string, buffer_return, length)
	       Display *display;
	       char *name, *message;
	       char *default_string;
	       char *buffer_return;
	       int length;

ARGUMENTS

       Returns	the  error description.  Specifies the error code for which you want to obtain a description.  Specifies the default error message
       if none is found in the database.  Specifies the connection to the X server.  Specifies the program's supplied  error  handler.	 Specifies
       the size of the buffer.	Specifies the type of the error message.  Specifies the name of the application.  Specifies the character string.

DESCRIPTION

       Xlib  generally calls the program's supplied error handler whenever an error is received. It is not called on BadName errors from OpenFont,
       LookupColor, or AllocNamedColor protocol requests or on BadFont errors from a  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  indi-
       rectly) on the display that will generate protocol requests or that will look for input events. The previous error handler is returned.

       The 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.

       The  XDisplayName function returns the name of the display that XOpenDisplay would attempt to use. If a NULL string is specified, XDisplay-
       Name looks in the environment for the display and returns the display name that 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.

       The  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.

       Note that the previous error handler is returned.

       The  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.

       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.  The protocol error number is used as a
       string for the message argument.  These are the message strings that are used internally by the library.  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 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  data-
       base, the default_string is returned to the buffer argument.

SEE ALSO

       XOpenDisplay(3X11), XSynchronize(3X11)

       Xlib -- C Language X Interface

															    XSetErrorHandler(3X11)