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 ctrlsmask, unsigned int ctrls, unsigned int *retflags, unsigned int *retctrls); 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
- ctrlsmask mask selecting debug controls to change
- ctrls values for debug controls selected by ctrlsmask
- retflags resulting state of all debug output flags
- retctrls 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 ctrlsmask and ctrls, prints the message msg, and backfills retflags and retctrls 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 dur‐ ing its processing. The device to which the output is written is imple‐
mentation-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 corre‐ sponding 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 corresponding bit in the flags parameter. When bits are set in the debug controls masks, ctrlsmask and ctrls, Xkb modifies its behavior according to each controls bit. ctrlsmask 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 ──────────────────────────────────────────────────────────────────── XkbDFDisableLocks (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 1.6.5 XkbSetDebuggingFlags(3)