1XkbSetDebuggingFlags(3) XKB FUNCTIONS XkbSetDebuggingFlags(3)
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6 XkbSetDebuggingFlags - Change the values of any of the debug controls
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9 Bool XkbSetDebuggingFlags (Display *display, unsigned int mask, un‐
10 signed int flags, char *msg, unsigned int ctrls_mask, unsigned
11 int ctrls, unsigned int *ret_flags, unsigned int *ret_ctrls);
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14 - display
15 connection to X server
16 - mask mask selecting debug output flags to change
18 - flags
20 values for debug output flags selected by mask
21 - msg message to print right now
23 - ctrls_mask
25 mask selecting debug controls to change
26 - ctrls
28 values for debug controls selected by ctrls_mask
29 - ret_flags
31 resulting state of all debug output flags
32 - ret_ctrls
34 resulting state of all debug controls
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37 The debugging aids are intended for use primarily by Xkb implementors
38 and are optional in any implementation.
39 There are two bitmasks that may be used to control debugging. One bit‐
41 mask controls the output of debugging information, and the other con‐
42 trols behavior. Both bitmasks are initially all zeros.
43 To change the values of any of the debug controls, use XkbSetDebug‐
45 gingFlags.
46 XkbSetDebuggingFlags modifies the debug output flags as specified by
48 mask and flags, modifies the debug controls flags as specified by
49 ctrls_mask and ctrls, prints the message msg, and backfills ret_flags
50 and ret_ctrls with the resulting debug output and debug controls flags.
51 When bits are set in the debug output masks, mask and flags, Xkb prints
53 debug information corresponding to each bit at appropriate points dur‐
54 ing its processing. The device to which the output is written is imple‐
55 mentation-dependent, but is normally the same device to which X server
56 error messages are directed; thus the bits that can be set in mask and
57 flags is implementation-specific. To turn on a debug output selection,
58 set the bit for the output in the mask parameter and set the corre‐
59 sponding bit in the flags parameter. To turn off event selection for an
60 event, set the bit for the output in the mask parameter and do not set
61 the corresponding bit in the flags parameter.
62 When bits are set in the debug controls masks, ctrls_mask and ctrls,
64 Xkb modifies its behavior according to each controls bit. ctrls_mask
65 and ctrls are related in the same way that mask and flags are. The
66 valid controls bits are defined in Table 1.
67 Table 1 Debug Control Masks
70 ────────────────────────────────────────────────────────────────────
71 Debug Control Mask Value Meaning
72 ────────────────────────────────────────────────────────────────────
73 XkbDF_DisableLocks (1 << 0) Disable actions that lock modifiers
74 XkbSetDebuggingFlags returns True if successful and False otherwise.
76 The only protocol error it may generate is BadAlloc, if for some reason
77 it is unable to allocate storage.
78 XkbSetDebuggingFlags is intended for developer use and may be disabled
80 in production X servers. If it is disabled, XkbSetDebuggingFlags has no
81 effect and does not generate any protocol errors.
82 The message in msg is written immediately. The device to which it is
84 written is implementation dependent but is normally the same device
85 where X server error messages are directed.
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88 True The XkbSetDebuggingFlags function returns True when suc‐
89 cessful.
90 False The XkbSetDebuggingFlags function returns False when not
92 successful.
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95 BadAlloc Unable to allocate storage
96X Version 11 libX11 1.8.1 XkbSetDebuggingFlags(3)