genext2fs - ext2 filesystem generator for embedded systems
SYNOPSIS
genext2fs [ options ] image
DESCRIPTION
genext2fs generates an ext2 filesystem
as a normal (non-root) user. It doesn't require you to mount
the image file to copy files on it. It doesn't even require
you to be the superuser to make device nodes.
OPTIONS
-x image
Use this image as a starting point
-d directory
Add this directory as source
-f file
Add nodes (e.g. devices) from this spec file
-b blocks
Size in blocks
-i inodes
Number of inodes
-r reserved
Number of reserved blocks
-g path
Generate a block map file for this path
-e value
Fill unallocated blocks with value
-z
Make files with holes
-v
Print resulting filesystem structure
-h
Display help
EXAMPLES
genext2fs -b 1440 -d src /dev/fd0
All files in the
src directory will be written to
/dev/fd0 as a new ext2 filesystem image. You can then mount the floppy as
usual.
genext2fs -b 1024 -d src -f dev.txt flashdisk.img
This example builds a filesystem from all the files in
src , then device nodes are created based on the contents of the device file
dev.txt. An example device file follows:
drwx /dev
crw- 10,190 /dev/lcd
brw- 1,0 /dev/ram0
This device list builds the /dev directory, a character device
node /dev/lcd (major 10, minor 190) and a block device node
/dev/ram0 (major 1, minor 0)
BUGS
genext2fs has been designed for embedded
systems. As such, it will generate a filesystem for single-user
usage: all files/directories/etc... will belong to UID/GID 0
genext2fs does not support hard links. Hard links present in the input
tree will be represented as separate files in the ext2 image.
