implemented chroot using bootstrap method

README.md

@@ -274,6 +274,8 @@ The following table is giving a list of error code with explanation:
 | 11        | Bad function call                   |
 | 12        | Error copying files                 |
 | 13        | Bad target file system              |
+| 14        | Impossible to chroot                |
+| 15        | Bad target filesystem/installation  |
 | 50..100   | Error in module execution           |
 | 126       | Command exists but not executable   |
 | 127       | Command not found                   |

init.sh

@@ -116,6 +116,10 @@ fi
 # -- Cannot be a function ends here
 # ------------------------------------------------------------------------------
 
+if [[ -n $CHROOT_PATH && -z $CHROOT_DONE ]]; then
+    chroot_bootstrap $@
+fi
+
 load_autoconf
 
 load_configuration

lib/zzz_main_fct.sh

@@ -139,6 +139,36 @@ read_commandline()
 export -f read_commandline
 
 
+# ------------------------------------------------------------------------------
+# If chrooted, we need to bootstrap to a new copy of our directory tree
+chroot_bootstrap()
+{
+    if [[ ! -d $CHROOT_PATH ]]; then
+        prnt E "The path given to chroot don't exists."
+        die 14
+    fi
+    if [[ ! -d $CHROOT_PATH/tmp ]]; then
+        prnt E "The target filesystem doesn't seems to be a valid installation."
+        die 15
+    fi
+
+    local tmpdir=$(mktemp -d $CHROOT_PATH/tmp/init.sh-XXXX)
+    local bootstrap_items="conf lib modules repo bash.rc init.sh"
+    if [[ $RESUME == true ]]; then
+        bootstrap_items="$bootstrap_items $STAGE_FILE"
+    fi
+
+    prnt I "Préparation du changement de racine."
+    cp -av $bootstrap_items $tmpdir
+
+    prnt I "Changement de racine et démarrage d'un fork d'init.sh..."
+    chroot $CHROOT_PATH /bin/bash -c 'CHROOT_DONE=true; $tmpdir/init.sh $@'
+
+    prnt I "Retours au système hote et nettoyage."
+    rm -rf $tmpdir
+    exit 0
+}
+
 # ------------------------------------------------------------------------------
 # Automatically load system specific configuration if file exist in the
 # following order: