From 1a68423186da7327d00b0cff6b8ff663bafe74d4 Mon Sep 17 00:00:00 2001
From: Pablo Duboue <pablo.duboue@gmail.com>
Date: Sun, 3 Dec 2023 17:37:02 -0800
Subject: [PATCH] Changing montlo to fuseext2 (fixes #4)

This is a great use of FUSE and it allows to create filesystem images as a regular user.

There are now FUSE filesystems for ext2, FAT, NTFS, etc so there is no need for mountlo.

This modified recipe uses fuseext2 and it fixes some issues with the shell script in the presence of bootable flags.
---
 README.md | 53 ++++++++++++++++++++++++++++-------------------------
 1 file changed, 28 insertions(+), 25 deletions(-)

diff --git a/README.md b/README.md
index 5716b16..480c055 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ A small loopback mount utility using FUSE.
 
 Mainly intended to allow creating of virtual disk images by giving specific offset/size access so that mke2fs can be run on less than the entire file.
 
-Once a virtual disk image has been partitioned and had the filesystems created, "mountlo" can be used to mount them.
+Once a virtual disk image has been partitioned and had the filesystems created, [fuseext2](https://packages.debian.org/bullseye/misc/fuseext2) can be used to mount it.
 
 Example:
 
@@ -14,44 +14,47 @@ Example:
     
     # Use fdisk to create a 100M partition
     # If we use 64/32/512 for heads/sectors/sectorsize cylinders=$DISK_SIZE_IN_M
-    fdisk -c -u -C 300 -H 64 -S 32 -b 512 mydisk.img << EOF
+    /sbin/fdisk -c -u -C 300 -H 64 -S 32 -b 512 mydisk.img << EOF
     n
     p
     1
     
     +100M
+    a
     w
     EOF
-    sectorsize=512
     
     # Use fdisk to give us the correct offset and size values to use with fuseloop
-    fdisk -c -u -l -C 300 -H 64 -S 32 -b 512 mydisk.img | grep mydisk.img | grep Linux | while read line
-    do
-      set -- $line
-      offs=$(($2*$sectorsize))
-      size=$((($3-$2)*$sectorsize))
-      
-      # Random name for partition dev
-      part=part.$$
-      touch "$part"
+    line=`/sbin/fdisk -c -u -l -C 300 -H 64 -S 32 -b 512 mydisk.img | grep mydisk.img | grep Linux | sed 's/\*//'`
+    set -- $line
+    sectorsize=512
+    offs=$(($2*$sectorsize))
+    size=$((($3-$2)*$sectorsize))
       
-      # Use fuseloop to expose the partition as an individual file/device
-      fuseloop -O "$offs" -S "$size" mydisk.img "$part"
+    # Random name for partition dev
+    part=part.$$
+    touch "$part"
       
-      # Create the file system
-      mke2fs -F "$part"
+    # Use fuseloop to expose the partition as an individual file/device
+    ./fuseloop -O "$offs" -S "$size" mydisk.img "$part"
       
-      # Unmount the partition
-      fusermount -u "$part"
+    # Create the file system
+    /sbin/mke2fs -F "$part"
       
-      # Clean up the partition file we mounted on
-      rm -f "$part"
-    done
-    
     # If you want, you can install the SYSLinux MBR to get a bootable image (remember to mark partition 1 as 'active' too!)
-    dd if=/usr/lib/syslinux/mbr.bin of=mydisk.img conv=notrunc
+    dd if=/usr/lib/syslinux/mbr/mbr.bin of=mydisk.img conv=notrunc
     
-    # With the filesystem laid down on the partition, mountlo can be used to mount it
-    mountlo -p1 -w mydisk.img /mnt
+    # With the filesystem laid down on the partition, fuseext2 can be used to mount it
+    mkdir mnt
+    fuseext2 -o rw,force $part mnt
+    # ... copy file to partition ...
   
+    # Unmount the partition
+    fusermount -u "$part"
+    fusermount -u mnt
+      
+    # Clean up the partition file we mounted on
+    rm -f "$part"
+    rmdir mnt
+