vcontainer: add vshell command for VM debug access

Add vshell command to vdkr/vpdmn for interactive shell access to the
QEMU VM where Docker/Podman runs. This is useful for debugging container
issues directly inside the virtual environment.

Usage:
  vdkr vmemres start
  vdkr vshell
  # Now inside VM, can run docker commands directly
  docker images
  docker inspect <image>
  exit

The vshell command requires the memory-resident daemon to be running
(vmemres start). It opens an interactive shell via the daemon's
--daemon-interactive mode.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/recipes-containers/vcontainer/files/vcontainer-common.sh b/recipes-containers/vcontainer/files/vcontainer-common.sh
index f10243f1..ddcb674f 100755
--- a/recipes-containers/vcontainer/files/vcontainer-common.sh
+++ b/recipes-containers/vcontainer/files/vcontainer-common.sh
@@ -330,6 +330,7 @@ ${BOLD}${RUNTIME_UPPER}-COMPATIBLE COMMANDS:${NC}
     ${CYAN}unpause${NC} <container>          Unpause a container
     ${CYAN}commit${NC} <container> <image>   Create image from container
     ${CYAN}exec${NC} [opts] <container> <cmd>  Execute command in container
+    ${CYAN}vshell${NC}                       Open interactive shell in VM (debug)
     ${CYAN}cp${NC} <src> <dest>              Copy files to/from container
 
   ${BOLD}Registry:${NC}
@@ -1565,6 +1566,25 @@ case "$COMMAND" in
         fi
         ;;
 
+    # VM shell - interactive shell into the VM itself (not a container)
+    vshell)
+        # Opens a shell directly in the vdkr/vpdmn VM for debugging
+        # This runs /bin/sh in the VM, not inside a container
+        # Useful for:
+        #   - Running docker commands directly to see full error output
+        #   - Debugging VM-level issues
+        #   - Inspecting the VM filesystem
+        if ! daemon_is_running; then
+            echo -e "${RED}[$VCONTAINER_RUNTIME_NAME]${NC} vshell requires daemon mode" >&2
+            echo "Start daemon with: $VCONTAINER_RUNTIME_NAME vmemres start" >&2
+            exit 1
+        fi
+
+        echo -e "${CYAN}[$VCONTAINER_RUNTIME_NAME]${NC} Opening VM shell (type 'exit' to return)..." >&2
+        RUNNER_ARGS=$(build_runner_args)
+        "$RUNNER" $RUNNER_ARGS --daemon-interactive -- "/bin/sh"
+        ;;
+
     # Runtime cp - copy files to/from container
     cp)
         if [ ${#COMMAND_ARGS[@]} -lt 2 ]; then