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XkbOpenDisplay(3) XKB FUNCTIONS XkbOpenDisplay(3)
NAME
XkbOpenDisplay - Checks for a compatible version of the Xkb extension in both the library
and the server, and initializes the extension for use.
SYNOPSIS
Display *XkbOpenDisplay (char *display_name, int *event_rtrn, int *error_rtrn, int
*major_in_out, int *minor_in_out, int *reason_rtrn);
ARGUMENTS
display_name
hardware display name, which determines the display and communications domain to be
used
event_rtrn
backfilled with the extension base event code
error_rtrn
backfilled with the extension base error code
major_in_out
compile time lib major version in, server major version out
minor_in_out
compile time lib min version in, server minor version out
reason_rtrn
backfilled with a status code
DESCRIPTION
As a convenience, you can use the function XkbOpenDisplay to perform these three tasks at
once: open a connection to an X server, check for a compatible version of the Xkb exten-
sion in both the library and the server, and initialize the extension for use.
XkbOpenDisplay is a convenience function that opens an X display connection and initial-
izes the X keyboard extension. In all cases, upon return reason_rtrn contains a status
value indicating success or the type of failure. If major_in_out and minor_in_out are not
NULL, XkbOpenDisplay first calls XkbLibraryVersion to determine whether the client library
is compatible, passing it the values pointed to by major_in_out and minor_in_out. If the
library is incompatible, XkbOpenDisplay backfills major_in_out and minor_in_out with the
major and minor extension versions of the library being used and returns NULL. If the
library is compatible, XkbOpenDisplay next calls XOpenDisplay with the display_name. If
this fails, the function returns NULL. If successful, XkbOpenDisplay calls XkbQueryExten-
sion and backfills the major and minor Xkb server extension version numbers in
major_in_out and minor_in_out. If the server extension version is not compatible with the
library extension version or if the server extension is not present, XkbOpenDisplay closes
the display and returns NULL. When successful, the function returns the display connec-
tion.
The possible values for reason_rtrn are:
o XkbOD_BadLibraryVersion indicates XkbLibraryVersion returned False.
o XkbOD_ConnectionRefused indicates the display could not be opened.
o XkbOD_BadServerVersion indicates the library and the server have incompatible exten-
sion versions.
o XkbOD_NonXkbServer indicates the extension is not present in the X server.
o XkbOD_Success indicates that the function succeeded.
RETURN VALUES
NULL The XkbOpenDisplay function returns NULL if the library is incompatible.
The XkbOpenDisplay function returns NULL if the call to XOpenDisplay with the
display_name fails.
The XkbOpenDisplay function returns NULL and closes the display if the server
extension version is not compatible with the library extension version or if
the server extension is not present.
DIAGNOSTICS
BadAccess The Xkb extension has not been properly initialized
SEE ALSO
XkbLibraryVersion(3), XkbQueryExtension(3), XOpenDisplay(3)
X Version 11 libX11 1.6.7 XkbOpenDisplay(3)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-04-25 11:37 @3.133.109.211 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)