Simple dd-like image writer with additional security checks.

This tool verifies your image automatically. The block size is currently set to 1 MiB, which should be enough to avoid trouble.

writeimg v0.2.0, Rev. 5323932-dirty
In honor of SwePwnage - the OG disk destroyer
Copyright (C) 2026 Imbus, BSD-2-Clause
Build date: 2026-02-07

Usage:
   writeimg [-v] -d <device> <file.img>

Args:
   <file.img>          Binary image file
   -v                  Verify only
   -d device           Target block device
   -h, --help          Print this help message
   -n, --noconfirm     Do not ask for premission
   -V, --version       Print version

Testing

dd if=/dev/zero of=./disk.img bs=1M count=1024
losetup -fP ./disk.img
losetup -a
losedup -d /dev/loop0

Inspiration

See:

• https://github.com/landley/toybox/blob/master/toys/posix/dd.c
• https://github.com/illiliti/libudev-zero
• https://github.com/LoupVaillant/Monocypher