enter: fix regression in login for initful container, Fix #1428

Signed-off-by: Luca Di Maio <[email protected]>

distrobox-enter

@@ -401,6 +401,12 @@ generate_enter_command()
  container_command="$(echo "${container_command}" | sed 's/\$/\\\$/g')"
  container_command="${container_command_login} -c \"${container_command}\""
  fi
+
+ # in case we don't have any command to launch, ensure we do a proper login with su
+ # we're using here the --shell option in order to execute a POSIX shell for the getent
+ # command, and then launch whichever shell the user has by default.
+ # This ensures a proper login also with non-posix shells like fish.
+ container_command_login="${container_command_login} -s /bin/sh -c \"\\\$(getent passwd ${USER} | cut -f 7 -d :) -l\""
  else
  result_command="${result_command}
  --user=\"${USER}\""