From 350ef0cb51e131443fa68d1c20ae3980680ca356 Mon Sep 17 00:00:00 2001
From: DarkCat09 <gh@dc09.ru>
Date: Tue, 9 Apr 2024 10:41:04 +0400
Subject: [PATCH] dchr-run v0.1.0

---
 run.sh | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100755 run.sh

diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..388bfa7
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+
+help () {
+  echo 'dchr-run <chroot-dir> <command>'
+  echo 'https://dchr.dc09.ru'
+}
+
+clean () {
+  echo '-- Cleaning up'
+  umount "$1/proc"
+  umount "$1/sys"
+  umount "$1/dev"
+  umount "$1/run"
+}
+
+error () {
+  echo -e '-- \e[1;31mError\e[0m -- see output above'
+  exit 1 # `trap` in main() calls cleanup function
+}
+
+setup () {
+  echo '-- Mounting'
+  mount -t proc /proc "$1/proc" || error
+  mount -t sysfs /sys "$1/sys" || error
+  mount -o bind /dev "$1/dev" || error
+  mount -o bind /run "$1/run"
+}
+
+cphosts () {
+  if ! [ -e "$1/etc/hosts" ]
+  then
+    echo '-- Copying hosts'
+    cp /etc/hosts "$1/etc/hosts"
+  fi
+  if ! [ -e "$1/etc/resolv.conf" ]
+  then
+    echo '-- Copying resolv.conf'
+    cp /etc/resolv.conf "$1/etc/resolv.conf"
+  fi
+}
+
+runcmd () {
+  echo -e '-- \e[1;32mOK\e[0m -- running chroot'
+  chroot "$1" "$2"
+  return $?
+}
+
+main () {
+  if [[ "$1" == "--help" ]] || [[ "$1" == "" ]]
+  then
+    help
+    exit 0
+  fi
+
+  chrdir="$(readlink -f "$1")"
+  chrcmd="${2:-/bin/bash}"
+
+  trap "clean $chrdir" EXIT
+
+  setup "$chrdir"
+  cphosts "$chrdir"
+  runcmd "$chrdir" "$chrcmd"
+  exit $?
+}
+
+sourced () {
+  if [ -n "$ZSH_VERSION" ]
+  then
+    case $ZSH_EVAL_CONTEXT in
+      *:file*) return 0;;
+    esac
+  elif [ -n "$BASH_VERSION" ]
+  then
+    ! [ "$0" = "$BASH_SOURCE" ] && return 0
+  fi
+  return 1
+}
+
+sourced || main $@