From 298dd9150ec8bc92af1bc1685726e1cd98d16b49 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Thu, 29 Oct 2026 02:12:35 +0800
Subject: Add configurable host directory bind mounts for container entry and
 command execution.

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
---
 debian-container/lib/binds.sh | 64 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 debian-container/lib/binds.sh

(limited to 'debian-container/lib/binds.sh')

diff --git a/debian-container/lib/binds.sh b/debian-container/lib/binds.sh
new file mode 100644
index 0000000..7725bd8
--- /dev/null
+++ b/debian-container/lib/binds.sh
@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (C) 2026 by Richard Qin
+
+DC_BIND_SPECS=()
+DC_BIND_SOURCES=()
+DC_BIND_TARGETS=()
+DC_BIND_MODES=()
+
+dc_bind_add() {
+  local spec=$1
+  local source
+  local target
+  local mode
+  local extra
+
+  IFS=: read -r source target mode extra <<< "$spec"
+  [[ -n "$source" && -n "$target" && -z "$extra" ]] || dc_die "挂载参数格式无效：$spec"
+  [[ "$source" = /* && "$target" = /* ]] || dc_die "挂载源和目标必须使用绝对路径：$spec"
+  [[ "$target" != "/" ]] || dc_die '不能把目录挂载到容器根目录。'
+
+  mode=${mode:-rw}
+  [[ "$mode" == rw || "$mode" == ro ]] || dc_die "挂载模式无效：$mode"
+  source=$(readlink -f -- "$source")
+  [[ -d "$source" ]] || dc_die "挂载源不是目录：$source"
+  target=$(readlink -m -- "$target")
+  [[ "$target" != "/" ]] || dc_die '不能把目录挂载到容器根目录。'
+
+  DC_BIND_SPECS+=("$source:$target:$mode")
+  DC_BIND_SOURCES+=("$source")
+  DC_BIND_TARGETS+=("$target")
+  DC_BIND_MODES+=("$mode")
+}
+
+dc_bind_load_options() {
+  while (($# > 0)); do
+    [[ "$1" == --mount ]] || dc_die '挂载参数格式无效。'
+    (($# >= 2)) || dc_die '--mount 需要一个挂载参数。'
+    dc_bind_add "$2"
+    shift 2
+  done
+}
+
+dc_bind_mount_all() {
+  local index
+  local target
+
+  for index in "${!DC_BIND_SPECS[@]}"; do
+    target="$DC_ROOT${DC_BIND_TARGETS[index]}"
+    mkdir -p "$target"
+    mount --bind "${DC_BIND_SOURCES[index]}" "$target"
+    if [[ "${DC_BIND_MODES[index]}" == ro ]]; then
+      mount -o remount,bind,ro "$target"
+    fi
+  done
+}
+
+dc_bind_cleanup() {
+  local index
+
+  for ((index = ${#DC_BIND_TARGETS[@]} - 1; index >= 0; index--)); do
+    umount "$DC_ROOT${DC_BIND_TARGETS[index]}" 2>/dev/null || true
+  done
+}
-- 
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