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XkbSetDebuggingFlags(3)          XKB FUNCTIONS         XkbSetDebuggingFlags(3)

       XkbSetDebuggingFlags - Change the values of any of the debug controls

       Bool  XkbSetDebuggingFlags  (  display,  mask,  flags, msg, ctrls_mask,
       ctrls, ret_flags, ret_ctrls )
             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;

       - 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

       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-

       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  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,  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.

       c   s  s  l  l  l.   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.

       True           The XkbSetDebuggingFlags function returns True when suc-

       False          The XkbSetDebuggingFlags function returns False when not

       BadAlloc       Unable to allocate storage

X Version 11                     libX11 1.1.5          XkbSetDebuggingFlags(3)