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https://github.com/okxlin/appstore.git
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okxlin
43c4005a16
Rebuilt-from-PR: #6708 Source-PR: https://github.com/okxlin/appstore/pull/6708 Maintainer-workflow: appstore-pr-maintainer
92 lines
2.6 KiB
Bash
Executable File
92 lines
2.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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export LC_ALL=C
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ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
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ENV_FILE="${ENV_FILE:-$ROOT_DIR/.env}"
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read_env_value() {
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local key="$1"
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[[ -f "$ENV_FILE" ]] || return 0
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local value
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value="$(sed -n "s/^${key}=//p" "$ENV_FILE" | tail -n 1)"
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case "$value" in
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\"*\") value="${value#\"}"; value="${value%\"}" ;;
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\'*\') value="${value#\'}"; value="${value%\'}" ;;
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esac
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printf '%s\n' "$value"
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}
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configured_value() {
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local key="$1"
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local default_value="$2"
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local value="${!key:-}"
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if [[ -z "$value" ]]; then
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value="$(read_env_value "$key")"
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fi
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printf '%s\n' "${value:-$default_value}"
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}
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resolve_app_path() {
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local key="$1"
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local raw="$2"
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local clean candidate resolved current part
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local -a parts=()
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case "$raw" in
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""|/*|.|..|../*|*/../*|*/..) echo "unsafe ${key} path" >&2; return 1 ;;
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esac
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if [[ "$raw" =~ [[:cntrl:]] ]]; then
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echo "unsafe ${key} path" >&2
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return 1
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fi
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clean="${raw#./}"
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[[ -n "$clean" ]] || { echo "unsafe ${key} path" >&2; return 1; }
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command -v realpath >/dev/null 2>&1 || { echo "realpath is required" >&2; return 1; }
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candidate="$ROOT_DIR/$clean"
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resolved="$(realpath -m -- "$candidate")" || { echo "unsafe ${key} path" >&2; return 1; }
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case "$resolved" in
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"$ROOT_DIR"/*) ;;
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*) echo "unsafe ${key} path" >&2; return 1 ;;
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esac
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current="$ROOT_DIR"
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IFS='/' read -r -a parts <<< "$clean"
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for part in "${parts[@]}"; do
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[[ -z "$part" || "$part" == "." ]] && continue
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current="$current/$part"
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if [[ -L "$current" ]]; then
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echo "unsafe ${key} path" >&2
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return 1
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fi
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done
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printf '%s\n' "$resolved"
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}
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data_raw="$(configured_value APP_DATA_DIR ./data)"
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pairing_ttl="$(configured_value PAIRING_TTL_SECONDS 86400)"
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[[ -n "$data_raw" && "$data_raw" != /* && "$data_raw" =~ ^[A-Za-z0-9._/-]+$ ]] || {
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printf '%s\n' 'APP_DATA_DIR must be a non-empty relative path using only letters, digits, dots, underscores, hyphens, and slashes' >&2
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exit 1
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}
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APP_DATA_DIR="$data_raw"
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data_dir="$(resolve_app_path APP_DATA_DIR "$APP_DATA_DIR")"
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if [[ ! "$pairing_ttl" =~ ^[0-9]+$ ]] || ((10#$pairing_ttl < 300 || 10#$pairing_ttl > 86400)); then
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printf '%s\n' 'PAIRING_TTL_SECONDS must be an integer from 300 through 86400' >&2
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exit 1
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fi
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install -d -m 0750 -- "$data_dir"
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[[ "$(resolve_app_path APP_DATA_DIR "$APP_DATA_DIR")" == "$data_dir" ]] || {
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printf '%s\n' 'APP_DATA_DIR changed during initialization' >&2
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exit 1
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}
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data_dir="$(realpath -e -- "$data_dir")"
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case "$data_dir" in
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"$ROOT_DIR"/*) ;;
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*)
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printf '%s\n' 'APP_DATA_DIR resolves outside the application version directory' >&2
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exit 1
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;;
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esac
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