1. Boot menu over serial supported

2. Optimization for booting Solus
3. Optimization for booting .efi file
4. support deepin-live iso
5. support Endless OS
6. framework for booting .img file

IMG/cpio/ventoy/ventoy_loop.sh

@@ -0,0 +1,116 @@
+#!/ventoy/busybox/sh
+#************************************************************************************
+# Copyright (c) 2020, longpanda <admin@ventoy.net>
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+# 
+#************************************************************************************
+
+####################################################################
+#                                                                  #
+# Step 1 : Parse kernel parameter                                  #
+#                                                                  #
+####################################################################
+if ! [ -e /proc ]; then
+    $BUSYBOX_PATH/mkdir /proc
+    rmproc='Y'
+fi
+$BUSYBOX_PATH/mount -t proc proc /proc
+
+# vtinit=xxx to replace rdinit=xxx
+vtcmdline=$($CAT /proc/cmdline)
+for i in $vtcmdline; do
+    if echo $i | $GREP -q vtinit; then
+        user_rdinit=${i#vtinit=}
+        echo "user set user_rdinit=${user_rdinit}" >>$VTLOG
+    fi
+done
+
+
+####################################################################
+#                                                                  #
+# Step 2 : Do OS specific hook                                     #
+#                                                                  #
+####################################################################
+ventoy_get_os_type() {
+    echo "kernel version" >> $VTLOG
+    $CAT /proc/version >> $VTLOG
+
+    # deepin-live
+    if $GREP -q 'deepin' /proc/version; then
+        echo 'deepin'; return
+    fi
+    
+    if $GREP -q 'endless' /proc/version; then
+        echo 'endless'; return
+    fi
+    
+    echo "default"
+}
+
+VTOS=$(ventoy_get_os_type)
+echo "OS=###${VTOS}###" >>$VTLOG
+if [ -e "$VTOY_PATH/loop/$VTOS/ventoy-hook.sh" ]; then
+    $BUSYBOX_PATH/sh "$VTOY_PATH/loop/$VTOS/ventoy-hook.sh"
+fi
+
+
+####################################################################
+#                                                                  #
+# Step 3 : Check for debug break                                   #
+#                                                                  #
+####################################################################
+if [ "$VTOY_BREAK_LEVEL" = "03" ] || [ "$VTOY_BREAK_LEVEL" = "13" ]; then
+    $SLEEP 5
+    echo -e "\n\n\033[32m ################################################# \033[0m"
+    echo -e "\033[32m ################ VENTOY DEBUG ################### \033[0m"
+    echo -e "\033[32m ################################################# \033[0m \n"
+    if [ "$VTOY_BREAK_LEVEL" = "13" ]; then 
+        $CAT $VTOY_PATH/log
+    fi
+    exec $BUSYBOX_PATH/sh
+fi
+
+
+####################################################################
+#                                                                  #
+# Step 3 : Hand over to real init                                  #
+#                                                                  #
+####################################################################
+$BUSYBOX_PATH/umount /proc
+if [ "$rmproc" = "Y" ]; then
+    $BUSYBOX_PATH/rm -rf /proc
+fi
+
+cd /
+
+unset VTLOG FIND GREP EGREP CAT AWK SED SLEEP HEAD
+
+for vtinit in $user_rdinit /sbin/init /init /linuxrc; do
+    if [ -d /ventoy_rdroot ]; then
+        if [ -e "/ventoy_rdroot$vtinit" ]; then
+            # switch_root will check /init file, this is a cheat code
+            echo 'switch_root' > /init
+            exec $BUSYBOX_PATH/switch_root /ventoy_rdroot "$vtinit"
+        fi
+    else
+        if [ -e "$vtinit" ];then
+            exec "$vtinit"
+        fi
+    fi
+done
+
+# Should never reach here
+echo -e "\n\n\033[31m ############ INIT NOT FOUND ############### \033[0m \n"
+exec $BUSYBOX_PATH/sh