Bugfix: Correctly check asprintf() return value
Fixes a crash when invalid multibyte window titles are set as _NET_WM_NAME
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@ -613,11 +613,19 @@ int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
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/* Save the old pointer to make the update atomic */
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char *new_name;
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int new_len;
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asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop), (char*)xcb_get_property_value(prop));
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if (asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop), (char*)xcb_get_property_value(prop)) == -1) {
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perror("asprintf");
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LOG("Could not format _NET_WM_NAME, ignoring new hint\n");
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return 1;
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}
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/* Convert it to UCS-2 here for not having to convert it later every time we want to pass it to X */
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char *ucs2_name = convert_utf8_to_ucs2(new_name, &new_len);
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LOG("_NET_WM_NAME changed to \"%s\"\n", new_name);
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free(new_name);
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if (ucs2_name == NULL) {
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LOG("Could not convert _NET_WM_NAME to UCS-2, ignoring new hint\n");
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return 1;
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}
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/* Check if they are the same and don’t update if so.
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Note the use of new_len * 2 to check all bytes as each glyph takes 2 bytes.
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