petitboot: Enable user separation

Turn on support for unprivileged user accounts in the Petitboot
environment, including setting up a basic non-root user and group.
The implementation also requires using the agetty package rather than
the busybox getty utility, calling the initial pb-console helper on
login rather than directly, and moving some shell init logic from
Petitboot and into a .shrc script.

If no root password is configured in NVRAM or at runtime then this has
no effect aside from some nicer shell behaviour. Once a password is
configured then most actions in Petitboot will require this password and
the shell runs as a normal user.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/openpower/configs/users-table b/openpower/configs/users-table
new file mode 100644
index 00000000..9c3be67c
--- /dev/null
+++ b/openpower/configs/users-table
@@ -0,0 +1 @@
+petituser 1111 petitgroup 2222 - /home/petituser /bin/sh wheel