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createkeyboard: do not segfault if xkb_keymap_new_from_names returns NULL

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Passing NULL to wlr_keyboard_set_keymap results in a segfault.
Example:

  Thread 1 "dwl" received signal SIGSEGV, Segmentation fault.
  0x00007ffff7e49b64 in xkb_keymap_ref () from /usr/lib/libxkbcommon.so.0
  (gdb) bt
  #0  0x00007ffff7e49b64 in xkb_keymap_ref () at /usr/lib/libxkbcommon.so.0
  #1  0x00007ffff7f06389 in wlr_keyboard_set_keymap () at /usr/lib/libwlroots.so.11
  #2  0x000055555555bc54 in createkeyboard ()
  #3  0x000055555555c283 in inputdevice ()
  #4  0x00007ffff7e8101e in wl_signal_emit_mutable () at /usr/lib/libwayland-server.so.0
  #5  0x00007ffff7e8101e in wl_signal_emit_mutable () at /usr/lib/libwayland-server.so.0
  #6  0x00007ffff7edb52c in  () at /usr/lib/libwlroots.so.11
  #7  0x00007ffff7ee44b6 in  () at /usr/lib/libwlroots.so.11
  #8  0x000055555555fe66 in main ()
This commit is contained in:
link2xt 2023-11-19 06:53:02 +00:00 committed by Leonardo Hernández
parent d6fabe3a15
commit b4da97446a
1 changed files with 2 additions and 0 deletions
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dwl.c
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@ -802,6 +802,8 @@ createkeyboard(struct wlr_keyboard *keyboard)
context = xkb_context_new(XKB_CONTEXT_NO_FLAGS); context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
keymap = xkb_keymap_new_from_names(context, &xkb_rules, keymap = xkb_keymap_new_from_names(context, &xkb_rules,
XKB_KEYMAP_COMPILE_NO_FLAGS); XKB_KEYMAP_COMPILE_NO_FLAGS);
if (!keymap)
die("createkeyboard: failed to compile keymap");
wlr_keyboard_set_keymap(keyboard, keymap); wlr_keyboard_set_keymap(keyboard, keymap);
xkb_keymap_unref(keymap); xkb_keymap_unref(keymap);