support devuan in Legacy BIOS mode.

IMG/cpio/ventoy/hook/debian/devuan-disk.sh

+#!/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/>.
+# 
+#************************************************************************************
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+if is_ventoy_hook_finished; then
+    exit 0
+fi
+
+vtlog "####### $0 $* ########"
+
+VTPATH_OLD=$PATH; PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+wait_for_usb_disk_ready
+
+vtdiskname=$(get_ventoy_disk_name)
+if [ "$vtdiskname" = "unknown" ]; then
+    vtlog "ventoy disk not found"
+    PATH=$VTPATH_OLD
+    exit 0
+fi
+
+ventoy_udev_disk_common_hook "${vtdiskname#/dev/}2"
+
+PATH=$VTPATH_OLD
+
+set_ventoy_hook_finish

IMG/cpio/ventoy/hook/debian/devuan-hook.sh

+#!/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/>.
+# 
+#************************************************************************************
+
+$SED "/Mount.*cdrom/a\ $BUSYBOX_PATH/sh $VTOY_PATH/hook/debian/devuan-disk.sh" -i /init
+

IMG/cpio/ventoy/hook/debian/ventoy-hook.sh

@@ -110,6 +110,10 @@ ventoy_get_debian_distro() {
         echo 'pyabr'; return
     fi
     
+    if [ -e /devuan-logo.txt ]; then
+        echo 'devuan'; return
+    fi
+    
     echo 'default'
 }
 

INSTALL/grub/grub.cfg

@@ -405,6 +405,8 @@ function distro_specify_initrd_file_phase2 {
         vt_linux_specify_initrd_file /live/initrd
     elif [ -f (loop)/initramfs-linux.img ]; then
         vt_linux_specify_initrd_file /initramfs-linux.img
+    elif [ -f (loop)/boot/isolinux/initrd.gz ]; then
+        vt_linux_specify_initrd_file /boot/isolinux/initrd.gz        
     fi
 }