Fixes <https://issues.guix.gnu.org/54770>.
Regression introduced in 400c9ed3d779308e56038305d40cd93acb496180.
Previously, for an encrypted /home (say), "cryptsetup open" would be
invoked by shepherd, with /dev/null as its standard input. It would
thus run in non-interactive mode and, instead of asking for a
passphrase, fail with:
Nothing to read on input.
This change ensures it runs in interactive mode.
* gnu/build/file-systems.scm (system*/console, system*/tty): New
procedures.
* gnu/system/mapped-devices.scm (open-luks-device): Use 'system*/tty'
instead of 'system*'.
931f13840b