Add configurable DOS drive volumes and tests

tests/run-dos-shell-tests.sh

@@ -0,0 +1,134 @@
+#!/bin/bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+DOS_SHELL="${ROOT_DIR}/scripts/dos-shell"
+
+if [ ! -x "${DOS_SHELL}" ]; then
+  echo "dos-shell not found or not executable at ${DOS_SHELL}" >&2
+  exit 1
+fi
+
+tmp_root="$(mktemp -d)"
+cleanup() {
+  rm -rf "${tmp_root}"
+}
+trap cleanup EXIT
+
+stub_bin="${tmp_root}/bin"
+mkdir -p "${stub_bin}"
+
+cat > "${stub_bin}/dosemu" <<'EOF'
+#!/bin/sh
+echo "dosemu stub invoked with: $*" >&2
+exit 0
+EOF
+chmod +x "${stub_bin}/dosemu"
+
+run_case() {
+  local name="$1"
+  local allow_mode="$2"
+  local reserved="$3"
+  local expected_files="$4"
+  shift 4
+  local asserts=("$@")
+
+  local case_dir="${tmp_root}/${name}"
+  local home_dir="${case_dir}/home"
+  local base_dir="${case_dir}/svardos_base"
+  local allowed_repo="${case_dir}/allowed_repo"
+  local allow_list="${case_dir}/allowed_list"
+  local extra_root="${case_dir}/extra_drives"
+
+  mkdir -p "${home_dir}" "${base_dir}" "${allowed_repo}" "${extra_root}"
+
+  # Populate minimal base image
+  echo "base-${name}" > "${base_dir}/BASE.TXT"
+
+  # Populate allowed repo fixtures
+  echo "common-${name}" > "${allowed_repo}/common.txt"
+  mkdir -p "${allowed_repo}/subdir"
+  echo "sub-${name}" > "${allowed_repo}/subdir/sub.txt"
+  echo "denied-${name}" > "${allowed_repo}/denied.txt"
+
+  # Prepare allow list (filled later per mode)
+  : > "${allow_list}"
+
+  # Create extra drive scaffolding
+  mkdir -p "${extra_root}/F"
+  echo "driveF-${name}" > "${extra_root}/F/file.txt"
+  mkdir -p "${extra_root}/D"
+  echo "driveD-${name}" > "${extra_root}/D/file.txt"
+
+  # Additional file for list mode
+  if [ "${allow_mode}" = "list" ]; then
+    {
+      echo "common.txt"
+      echo "subdir/sub.txt"
+    } > "${allow_list}"
+  fi
+
+  # Expected files in C: after sync
+  IFS=',' read -ra expected_array <<< "${expected_files}"
+
+  (
+    export PATH="${stub_bin}:${PATH}"
+    export HOME="${home_dir}"
+    export SVARDOS_ROOT="${case_dir}/svardos_root"
+    export SVARDOS_BASE="${base_dir}"
+    export DOS_FORCE_INSTALL=1
+    export DOS_ALLOW_MODE="${allow_mode}"
+    export DOS_EXTRA_DRIVE_ROOT="${extra_root}"
+    export DOS_RESERVED_DRIVES="${reserved}"
+    export DOS_ALLOWED_REPO="${allowed_repo}"
+    export DOS_ALLOWED_LIST="${allow_list}"
+    "${DOS_SHELL}" >/dev/null
+  )
+
+  local c_drive="${home_dir}/.dosemu/drive_c"
+
+  for rel_path in "${expected_array[@]}"; do
+    if [ ! -f "${c_drive}/${rel_path}" ]; then
+      echo "[${name}] expected file missing in C: ${rel_path}" >&2
+      exit 1
+    fi
+  done
+
+  for assert in "${asserts[@]}"; do
+    case "${assert}" in
+      expect_symlink:*)
+        local letter="${assert#expect_symlink:}"
+        local link="${home_dir}/.dosemu/drive_${letter,,}"
+        if [ ! -L "${link}" ]; then
+          echo "[${name}] expected symlink for drive ${letter^^}: not found" >&2
+          exit 1
+        fi
+        ;;
+      expect_absent:*)
+        local letter="${assert#expect_absent:}"
+        local link="${home_dir}/.dosemu/drive_${letter,,}"
+        if [ -e "${link}" ]; then
+          echo "[${name}] expected drive ${letter^^}: to be absent, found $(ls -ld "${link}")" >&2
+          exit 1
+        fi
+        ;;
+      expect_no_file:*)
+        local rel="${assert#expect_no_file:}"
+        if [ -e "${c_drive}/${rel}" ]; then
+          echo "[${name}] unexpected file present in C: ${rel}" >&2
+          exit 1
+        fi
+        ;;
+    esac
+  done
+
+  echo "[${name}] OK"
+}
+
+run_case "allow-all" "all" "CDE" "BASE.TXT,common.txt,subdir/sub.txt,denied.txt" \
+  "expect_symlink:f" "expect_absent:d"
+
+run_case "allow-list-reserved-override" "list" "C" "BASE.TXT,common.txt,subdir/sub.txt" \
+  "expect_symlink:f" "expect_symlink:d" "expect_no_file:denied.txt"
+
+echo "All tests passed."