gtk-update-icon-cache-3.0 -V (return code: 1)
gtk-update-icon-cache-3.0: No theme index file.
gtk-update-icon-cache-3.0 --help (return code: 0)
Usage:
gtk-update-icon-cache-3.0 [OPTION...] ICONPATH
Help Options:
-h, --help Show help options
Application Options:
-f, --force Overwrite an existing cache, even if up to date
-t, --ignore-theme-index Don't check for the existence of index.theme
-i, --index-only Don't include image data in the cache
--include-image-data Include image data in the cache
-c, --source=NAME Output a C header file
-q, --quiet Turn off verbose output
-v, --validate Validate existing icon cache