Input attempt from subprocesses ignored

[fosskers]

My program calls out to certain external programs, and they themselves have certain confirmation prompts. I used to use raw shell calls from base, but am trying to port to Shelly. Shelly seems to ignore attempts by the subprogarms to get input:

colin@yumi ~/c/h/aura> stack exec -- sudo aura -Rsu pkgbuilder
checking dependencies...

Packages (5) asp-2-1  pyalpm-0.8.2-2  python-parse-1.8.2-1  python-srcinfo-0.0.8-2  pkgbuilder-4.2.17-1

Total Removed Size:  0.81 MiB

:: Do you want to remove these packages? [Y/n] 
aura: 
Ran commands: 
pacman -R -s -u pkgbuilder
which pacman

Exception: error running: pacman -R -s -u pkgbuilder
exit status: 1
stderr: :: Do you want to remove these packages? [Y/n] 

colin@yumi ~/c/h/aura> 

and as you can see, the subprogram pacman immediatel exists with 1 instead of being allowed to accept user input.

Thoughts? Thank you.

[fosskers]

The answer was to use runHandles and set the various handles to Inherit, as in:

runHandles c args [ InHandle Inherit, OutHandle Inherit, ErrorHandle Inherit ] f