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 bitmask controls the output of
       debugging information, and the other controls behavior.  Both bitmasks are initially all zeros.

       To change the values of any of the debug controls, use XkbSetDebuggingFlags.

       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
       implementation-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 corresponding 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 successful.

       False          The XkbSetDebuggingFlags function returns False when not successful.

DIAGNOSTICS

       BadAlloc       Unable to allocate storage

X Version 11                                      libX11 1.8.7                           XkbSetDebuggingFlags(3)