Cannot run program that expects input like ghci and fzf

[mingyuguo]

If I do cmd "ghci abc.hs", what I see is that ghci launched and abc.hs successfully loaded, but then ghci immediately exists (I am assuming that's because it detects that "cmd" no longer sends anything to stdin.

Similarly, cmd "fzf" will not show anything.
cmd "xterm -e fzf" will work though.

[andreasabel]

Maybe you find a suitable function in module System.Process: https://hackage.haskell.org/package/process-1.6.13.2/docs/System-Process.html