gpicview -V (return code: 1)
option parsing failed: Cannot open display:
gpicview --help (return code: 0)
Usage:
gpicview [OPTION?] [FILE] - simple image viewer
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gtk Show GTK+ Options
Application Options:
-v, --version Print version information and exit
--slideshow Start slideshow
--display=DISPLAY X display to use