From 840cb9cbf0145a203f5f7eb562746e101d101494 Mon Sep 17 00:00:00 2001
From: TolaMironcenko <mironcenkotola@gmail.com>
Date: Mon, 23 Sep 2024 17:39:46 +0700
Subject: [PATCH] linux-chroot.sh added in bin

---
 bin/linux-chroot.sh | 65 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100755 bin/linux-chroot.sh

diff --git a/bin/linux-chroot.sh b/bin/linux-chroot.sh
new file mode 100755
index 0000000..f11516d
--- /dev/null
+++ b/bin/linux-chroot.sh
@@ -0,0 +1,65 @@
+#!/bin/sh
+
+PATH=$1
+SHELL=$2
+
+#------- Check root func -------------------
+check_root() {
+    if [ $(/usr/bin/id -u) -ne 0 ]; then
+        printf "** You must be root\n"
+        exit 1
+    fi
+}
+#-------------------------------------------
+
+#----------- checking or create dirs -------
+check_or_mkdir() {
+    [ ! -d $PATH/dev ] && mkdir -pv $PATH/dev
+    [ ! -d $PATH/proc ] && mkdir -pv $PATH/proc
+    [ ! -d $PATH/sys ] && mkdir -pv $PATH/sys
+    [ ! -d $PATH/run ] && mkdir -pv $PATH/run
+}
+#-------------------------------------------
+
+#-------- mount virtual filesystems --------
+mount_virtual() {
+    /usr/bin/mount -v --bind /dev $PATH/dev
+    /usr/bin/mount -vt devpts devpts -o gid=5,mode=0620 $PATH/dev/pts
+    /usr/bin/mount -vt proc proc $PATH/proc
+    /usr/bin/mount -vt sysfs sysfs $PATH/sys
+    /usr/bin/mount -vt tmpfs tmpfs $PATH/run
+    if [ -h $PATH/dev/shm ]; then
+        /usr/bin/install -v -d -m 1777 $PATH$(/usr/bin/realpath /dev/shm)
+    else
+        /usr/bin/mount -vt tmpfs -o nosuid,nodev tmpfs $PATH/dev/shm
+    fi
+    /usr/bin/cp -v /etc/resolv.conf $PATH/etc/resolv.conf
+}
+#-------------------------------------------
+
+#------ umount virtual filesystems ---------
+umount_virtual() {
+    /usr/bin/mountpoint -q $PATH/dev/shm && /usr/bin/umount $PATH/dev/shm
+    /usr/bin/umount $PATH/dev/pts
+    /usr/bin/umount $PATH/{sys,proc,run,dev}
+}
+#-------------------------------------------
+
+#------ get shell path func ----------------
+get_shell() {
+    if [[ "$SHELL" != "" ]]; then
+        echo $SHELL
+    fi
+    echo "/bin/sh"
+}
+#-------------------------------------------
+
+check_root
+check_or_mkdir
+mount_virtual
+/usr/bin/chroot \
+    $PATH \
+    /usr/bin/env -i \
+    PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin \
+    $(get_shell)
+umount_virtual