stty: unshare -rm sh -c "mount --bind /mnt /dev && stty <&-" SIGABRT

[oech3]

$ unshare -rm sh -c "mount --bind /mnt /dev && uu-stty <&-"
[SIGABRT]
$ unshare -rm sh -c "mount --bind /mnt /dev && gnu9.9/stty <&-"
stty: 'standard input': Bad file descriptor

[ChrisDryden]

Being able to fix all of the "Bad file descriptor" errors requires us to intercept the state of the file descriptors before the rust runtime overrides them to /dev/null. This PR enables that but its one of many possible approaches: #9664

[anastygnome]

#9664 was merged. I suggest we use the same approach here, this way the code remains clean