fcitx --version (return code: 0)
fcitx version: 4.2.9.1
fcitx --help (return code: 0)
Usage: fcitx [OPTION]
-r, --replace try replace existing fcitx, need module support.
-d run as daemon(default)
-D don't run as daemon
-s[sleep time] override delay start time in config file, 0 for immediate start
-v, --version display the version information and exit
-u, --ui specify the user interface to use
--enable specify a comma separated list for addon that will override the enable option
--disable specify a comma separated list for addon that will explicitly disabled,
priority is lower than --enable, can use all for disable all module
-h, --help display this help and exit