XkbSetDebuggingFlags(3) XKB FUNCTIONS XkbSetDebuggingFlags(3)
NAME
XkbSetDebuggingFlags - Change the values of any of the debug controls
SYNOPSIS
Bool XkbSetDebuggingFlags (Display *display, unsigned int mask, unsigned
int flags, char *msg, unsigned int ctrls_mask, unsigned int
ctrls, unsigned int *ret_flags, unsigned int *ret_ctrls);
ARGUMENTS
display
connection to X server
mask mask selecting debug output flags to change
flags values for debug output flags selected by mask
msg message to print right now
ctrls_mask
mask selecting debug controls to change
ctrls values for debug controls selected by ctrls_mask
ret_flags
resulting state of all debug output flags
ret_ctrls
resulting state of all debug controls
DESCRIPTION
The debugging aids are intended for use primarily by Xkb implementors
and are optional in any implementation.
There are two bitmasks that may be used to control debugging. One bit-
mask controls the output of debugging information, and the other con-
trols behavior. Both bitmasks are initially all zeros.
To change the values of any of the debug controls, use XkbSetDebug-
gingFlags.
XkbSetDebuggingFlags modifies the debug output flags as specified by
mask and flags, modifies the debug controls flags as specified by
ctrls_mask and ctrls, prints the message msg, and backfills ret_flags
and ret_ctrls with the resulting debug output and debug controls flags.
When bits are set in the debug output masks, mask and flags, Xkb prints
debug information corresponding to each bit at appropriate points during
its processing. The device to which the output is written is implementa-
tion-dependent, but is normally the same device to which X server error
messages are directed; thus the bits that can be set in mask and flags
is implementation-specific. To turn on a debug output selection, set the
bit for the output in the mask parameter and set the corresponding bit
in the flags parameter. To turn off event selection for an event, set
the bit for the output in the mask parameter and do not set the corre-
sponding bit in the flags parameter.
When bits are set in the debug controls masks, ctrls_mask and ctrls, Xkb
modifies its behavior according to each controls bit. ctrls_mask and
ctrls are related in the same way that mask and flags are. The valid
controls bits are defined in Table 1.
Table 1 Debug Control Masks
────────────────────────────────────────────────────────────────────
Debug Control Mask Value Meaning
────────────────────────────────────────────────────────────────────
XkbDF_DisableLocks (1 << 0) Disable actions that lock modifiers
XkbSetDebuggingFlags returns True if successful and False otherwise. The
only protocol error it may generate is BadAlloc, if for some reason it
is unable to allocate storage.
XkbSetDebuggingFlags is intended for developer use and may be disabled
in production X servers. If it is disabled, XkbSetDebuggingFlags has no
effect and does not generate any protocol errors.
The message in msg is written immediately. The device to which it is
written is implementation dependent but is normally the same device
where X server error messages are directed.
RETURN VALUES
True The XkbSetDebuggingFlags function returns True when suc-
cessful.
False The XkbSetDebuggingFlags function returns False when not
successful.
DIAGNOSTICS
BadAlloc Unable to allocate storage
X Version 11 libX11 1.8.12 XkbSetDebuggingFlags(3)
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