it boots
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randogoth
parent
48372efb6d
commit
daae8bd74e
9 changed files with 184 additions and 34 deletions
115
scripts/dos-shell
Executable file
115
scripts/dos-shell
Executable file
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#!/bin/bash
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# /usr/local/bin/dos-shell
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# 1) reset C: drive contents to only the allowed files
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# 2) launch dosemu with /cdrive mounted as C:
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set -euo pipefail
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ALLOWED_LIST="/etc/dos_allowed"
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ALLOWED_REPO="/opt/allowed_repo" # repository of allowed DOS files stored in container
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C_DRIVE="/cdrive"
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ENV_DIR="/etc/dos_env"
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AUTOEXEC_TEMPLATE="${ENV_DIR}/AUTOEXEC.BAT"
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CONFIG_TEMPLATE="${ENV_DIR}/CONFIG.SYS"
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SVARDOS_BASE="/opt/svardos/base"
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ALLOW_MODE="${DOS_ALLOW_MODE:-all}" # default to exposing everything from the repo
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if [ "$(id -u)" -eq 0 ] && [ ! -d "${ENV_DIR}" ]; then
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mkdir -p "${ENV_DIR}"
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fi
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# clear C: drive to ensure only allowed programs are present
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rm -rf "${C_DRIVE:?}/"*
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mkdir -p "${C_DRIVE}"
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# Seed the C: drive with the SvarDOS base image
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if [ -e "${SVARDOS_BASE}/COMMAND.COM" ] || [ -e "${SVARDOS_BASE}/command.com" ]; then
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cp -a "${SVARDOS_BASE}/." "${C_DRIVE}/"
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else
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echo "SvarDOS base not found in ${SVARDOS_BASE}. Aborting." >&2
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exit 1
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fi
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# Sync additional DOS files into the C: drive
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allowed_entries=()
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case "${ALLOW_MODE}" in
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all)
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if [ -d "${ALLOWED_REPO}" ] && [ "$(ls -A "${ALLOWED_REPO}")" ]; then
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cp -a "${ALLOWED_REPO}/." "${C_DRIVE}/"
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fi
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;;
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list|allowlist)
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;;
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*)
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echo "Unknown DOS_ALLOW_MODE '${ALLOW_MODE}', falling back to allowlist mode." >&2
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ALLOW_MODE="list"
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;;
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esac
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if [ "${ALLOW_MODE}" != "all" ]; then
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if [ -f "${ALLOWED_LIST}" ]; then
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while IFS= read -r line || [ -n "$line" ]; do
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# trim whitespace
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line="$(printf '%s' "$line" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
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# skip blank/comment lines
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case "$line" in
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''|\#*) continue ;;
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esac
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allowed_entries+=("$line")
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done < "${ALLOWED_LIST}"
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fi
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for entry in "${allowed_entries[@]}"; do
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src="${ALLOWED_REPO}/${entry}"
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if [ -e "$src" ]; then
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dst_dir="$(dirname "${entry}")"
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mkdir -p "${C_DRIVE}/${dst_dir}"
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cp -a "$src" "${C_DRIVE}/${dst_dir}/"
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else
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echo "Warning: allowed file not found: $src" >&2
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fi
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done
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fi
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# Optional: create an AUTOEXEC.BAT and CONFIG.SYS or other DOS boot files
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autoexec_path="${C_DRIVE}/AUTOEXEC.BAT"
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config_path="${C_DRIVE}/CONFIG.SYS"
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if [ -f "${AUTOEXEC_TEMPLATE}" ]; then
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cp "${AUTOEXEC_TEMPLATE}" "${autoexec_path}"
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else
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cat > "${autoexec_path}" <<'EOF'
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@echo off
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prompt [DOS]$P$G
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echo Welcome to the containerized DOS environment.
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EOF
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fi
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if [ "${ALLOW_MODE}" = "all" ]; then
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printf 'echo All repository programs are currently enabled.\r\n' >> "${autoexec_path}"
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elif [ ${#allowed_entries[@]} -gt 0 ]; then
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{
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printf 'echo Allowed programs:\r\n'
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for entry in "${allowed_entries[@]}"; do
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dos_entry="${entry//\//\\}"
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printf 'echo %s\r\n' "${dos_entry}"
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done
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} >> "${autoexec_path}"
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else
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{
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printf 'echo No extra programs are currently enabled.\r\n'
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} >> "${autoexec_path}"
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fi
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if [ -f "${CONFIG_TEMPLATE}" ]; then
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cp "${CONFIG_TEMPLATE}" "${config_path}"
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fi
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# Drop privileges to dosuser if we were run as root (ssh will run as the user)
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# but in case sshd runs ForceCommand as root, we switch.
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if [ "$(id -u)" -eq 0 ]; then
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exec runuser -u dosuser -- dosemu -quiet -K "${C_DRIVE}"
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else
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# running as the user already
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exec dosemu -quiet -K "${C_DRIVE}"
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fi
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79
scripts/prepare-svardos.sh
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79
scripts/prepare-svardos.sh
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@ -0,0 +1,79 @@
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#!/bin/bash
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set -euo pipefail
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SVARDOS_BASE_DIR="/opt/svardos/base"
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SVARDOS_CACHE="/opt/svardos/cache"
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SVARDOS_IMG="${SVARDOS_CACHE}/svardos.img"
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DEFAULT_REL="download/20250427/svardos-20250427-floppy-1.44M.zip"
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DEFAULT_BASE="http://svardos.org"
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if [ -z "${SVARDOS_IMG_URL:-}" ]; then
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homepage="$(
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curl -fsSL "${DEFAULT_BASE}/" 2>/dev/null || true
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)"
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discovered_rel=""
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if [ -n "$homepage" ]; then
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for pattern in 'download/[0-9]+/svardos-[0-9]+-floppy-1\.44M\.zip' 'download/[0-9]+/svardos-[0-9]+-usb\.zip'; do
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candidate="$(printf '%s' "$homepage" | grep -Eo "$pattern" | head -n1)"
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if [ -n "$candidate" ]; then
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discovered_rel="$candidate"
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break
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fi
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done
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fi
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if [ -n "$discovered_rel" ]; then
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SVARDOS_IMG_URL="${DEFAULT_BASE}/${discovered_rel}"
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else
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SVARDOS_IMG_URL="${DEFAULT_BASE}/${DEFAULT_REL}"
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fi
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fi
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if [ -e "${SVARDOS_BASE_DIR}/COMMAND.COM" ] || [ -e "${SVARDOS_BASE_DIR}/command.com" ]; then
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exit 0
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fi
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mkdir -p "${SVARDOS_BASE_DIR}" "${SVARDOS_CACHE}"
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tmp_archive="${SVARDOS_CACHE}/svardos_download"
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rm -f "${tmp_archive}" "${SVARDOS_IMG}"
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echo "Fetching SvarDOS base from ${SVARDOS_IMG_URL}"
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curl -fsSL "${SVARDOS_IMG_URL}" -o "${tmp_archive}"
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mime_type="$(file -b --mime-type "${tmp_archive}")"
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case "${mime_type}" in
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application/zip)
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unzip -o "${tmp_archive}" -d "${SVARDOS_CACHE}" >/dev/null
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;;
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application/x-bzip2|application/x-gzip|application/x-xz)
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tar -xf "${tmp_archive}" -C "${SVARDOS_CACHE}"
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;;
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application/octet-stream)
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# assume this is already a raw image
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cp "${tmp_archive}" "${SVARDOS_IMG}"
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;;
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*)
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echo "Unsupported SvarDOS payload type: ${mime_type}" >&2
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exit 1
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;;
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esac
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if [ ! -f "${SVARDOS_IMG}" ]; then
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# try to locate the image file
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candidate="$(find "${SVARDOS_CACHE}" -maxdepth 1 -type f \( -iname '*svardos*.img' -o -iname '*.ima' -o -iname '*.img' \) | head -n1)"
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if [ -z "${candidate}" ]; then
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echo "Could not locate a SvarDOS disk image after extraction." >&2
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exit 1
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fi
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mv "${candidate}" "${SVARDOS_IMG}"
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fi
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rm -rf "${SVARDOS_BASE_DIR}"/*
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mkdir -p "${SVARDOS_BASE_DIR}"
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# Copy contents of FAT image into the base directory
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mcopy -s -i "${SVARDOS_IMG}" ::* "${SVARDOS_BASE_DIR}/"
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rm -f "${SVARDOS_IMG}" "${tmp_archive}"
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rm -rf "${SVARDOS_CACHE}"
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echo "SvarDOS base copied to ${SVARDOS_BASE_DIR}"
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20
scripts/start-services.sh
Executable file
20
scripts/start-services.sh
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@ -0,0 +1,20 @@
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#!/bin/bash
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set -euo pipefail
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TELNET_PORT="${TELNET_PORT:-23}"
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TELNET_LOGIN="${TELNET_LOGIN:-/bin/login}"
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TELNETD_BIN="${TELNETD_BIN:-/bin/busybox}"
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ENABLE_TELNET="${ENABLE_TELNET:-1}"
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if [ "$ENABLE_TELNET" = "1" ]; then
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if [ ! -x "$TELNETD_BIN" ]; then
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echo "Telnet disabled: telnetd binary not found at $TELNETD_BIN" >&2
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else
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echo "Starting telnetd on port $TELNET_PORT"
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if ! "$TELNETD_BIN" telnetd -p "$TELNET_PORT" -l "$TELNET_LOGIN"; then
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echo "Warning: failed to launch telnetd; SSH remains available." >&2
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fi
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fi
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fi
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exec /usr/sbin/sshd -D -e
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