---
name: "xcb_xkb_list_components_compat_maps_length"
section: "3"
platform: "linux"
package: "libxcb"
version: "1.17.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/xcb_xkb_list_components"
---

# xcb\_xkb\_list\_components\_compat\_maps\_length(3)

Part of [xcb\_xkb\_list\_components(3)](/xcb_xkb_list_components/3.md).

## NAME

xcb\_xkb\_list\_components -

## SYNOPSIS

**#include \<xcb/xkb.h\>**

### Request function

xcb\_xkb\_list\_components\_cookie\_t **xcb\_xkb\_list\_components**(xcb\_connection\_t \**conn*, xcb\_xkb\_device\_spec\_t *deviceSpec*, uint16\_t *maxNames*);

### Reply datastructure

```

typedef struct xcb_xkb_list_components_reply_t {
    uint8_t  response_type;
    uint8_t  deviceID;
    uint16_t sequence;
    uint32_t length;
    uint16_t nKeymaps;
    uint16_t nKeycodes;
    uint16_t nTypes;
    uint16_t nCompatMaps;
    uint16_t nSymbols;
    uint16_t nGeometries;
    uint16_t extra;
    uint8_t  pad0[10];
} xcb_xkb_list_components_reply_t;
```

### Reply function

xcb\_xkb\_list\_components\_reply\_t \***xcb\_xkb\_list\_components\_reply**(xcb\_connection\_t \**conn*, xcb\_xkb\_list\_components\_cookie\_t *cookie*, xcb\_generic\_error\_t \*\**e*);

### Reply accessors

int **xcb\_xkb\_list\_components\_keymaps\_length**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

xcb\_xkb\_listing\_iterator\_t **xcb\_xkb\_list\_components\_keymaps\_iterator**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

int **xcb\_xkb\_list\_components\_keycodes\_length**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

xcb\_xkb\_listing\_iterator\_t **xcb\_xkb\_list\_components\_keycodes\_iterator**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

int **xcb\_xkb\_list\_components\_types\_length**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

xcb\_xkb\_listing\_iterator\_t **xcb\_xkb\_list\_components\_types\_iterator**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

int **xcb\_xkb\_list\_components\_compat\_maps\_length**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

xcb\_xkb\_listing\_iterator\_t **xcb\_xkb\_list\_components\_compat\_maps\_iterator**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

int **xcb\_xkb\_list\_components\_symbols\_length**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

xcb\_xkb\_listing\_iterator\_t **xcb\_xkb\_list\_components\_symbols\_iterator**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

int **xcb\_xkb\_list\_components\_geometries\_length**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);

xcb\_xkb\_listing\_iterator\_t **xcb\_xkb\_list\_components\_geometries\_iterator**(const xcb\_xkb\_list\_components\_reply\_t \**reply*);\

## REQUEST ARGUMENTS

- *conn*

  The XCB connection to X11.

- *deviceSpec*

  TODO: NOT YET DOCUMENTED.

- *maxNames*

  TODO: NOT YET DOCUMENTED.

## REPLY FIELDS

- *response\_type*

  The type of this reply, in this case *XCB\_XKB\_LIST\_COMPONENTS*. This field is also present in the *xcb\_generic\_reply\_t* and can be used to tell replies apart from each other.

- *sequence*

  The sequence number of the last request processed by the X11 server.

- *length*

  The length of the reply, in words (a word is 4 bytes).

- *deviceID*

  TODO: NOT YET DOCUMENTED.

- *nKeymaps*

  TODO: NOT YET DOCUMENTED.

- *nKeycodes*

  TODO: NOT YET DOCUMENTED.

- *nTypes*

  TODO: NOT YET DOCUMENTED.

- *nCompatMaps*

  TODO: NOT YET DOCUMENTED.

- *nSymbols*

  TODO: NOT YET DOCUMENTED.

- *nGeometries*

  TODO: NOT YET DOCUMENTED.

- *extra*

  TODO: NOT YET DOCUMENTED.

## DESCRIPTION

## RETURN VALUE

Returns an *xcb\_xkb\_list\_components\_cookie\_t*. Errors have to be handled when calling the reply function *xcb\_xkb\_list\_components\_reply*.

If you want to handle errors in the event loop instead, use *xcb\_xkb\_list\_components\_unchecked*. See **[xcb-requests(3)](/xcb-requests/3.md)** for details.

## ERRORS

This request does never generate any errors.

## SEE ALSO

## AUTHOR

Generated from xkb.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.