ext4-cli

Read ext4 filesystems from image files and block devices — without mounting them.

Quick start

# Install (pick one)
cargo install ext4-cli          # From crates.io
pip install ext4-cli            # Via pip
uvx ext4-cli --help             # Run without installing (via uv)

# Use
ext4 --source disk.img ls /etc
ext4 --source disk.img cat /etc/fstab
ext4 --source disk.img cp /etc /tmp/etc-backup -r

Installation

From crates.io

cargo install ext4-cli

From PyPI

pip install ext4-cli
# or run without installing:
uvx ext4-cli ls /

From Homebrew

brew install rvben/tap/ext4

From GitHub releases

Pre-built binaries for Linux (x64, arm64) and macOS (x64, arm64) on the releases page.

Usage

All commands require a source — an ext4 image file or raw block device — via --source or the EXT4_SOURCE environment variable:

export EXT4_SOURCE=/dev/rdisk4s2
ext4 ls /

Commands

`ls` — list directory contents

ext4 --source disk.img ls                     # List root directory
ext4 --source disk.img ls /etc                # List /etc
ext4 --source disk.img ls -l /etc             # Long format (permissions, uid, gid, size)
ext4 --source disk.img ls -a /etc             # Include dotfiles
ext4 --source disk.img ls --json /etc         # JSON output

`cat` — print file contents

ext4 --source disk.img cat /etc/fstab
ext4 --source disk.img cat /etc/passwd

`cp` — extract files

ext4 --source disk.img cp /etc/fstab ./fstab          # Extract a file
ext4 --source disk.img cp /etc /tmp/etc-backup -r     # Extract a directory tree

`stat` — show file metadata

ext4 --source disk.img stat /etc/fstab
ext4 --source disk.img stat --json /etc/fstab

`info` — show filesystem metadata

ext4 --source disk.img info
ext4 --source disk.img info --json

Raw block devices (macOS)

On macOS, use the raw disk path (/dev/rdisk*) for better performance. Reading raw block devices requires root access:

sudo ext4 --source /dev/rdisk4s2 ls /

Exit codes

Code	Meaning
0	Success
1	General error
2	Permission denied
3	Path not found

Development

make fixtures   # Generate test fixtures (requires e2fsprogs)
make test       # Run tests
make lint       # Run fmt + clippy
make install    # Build and install

License

MIT OR Apache-2.0

Development Status
- 3 - Alpha
Environment
- Console
Intended Audience
- System Administrators
License
- OSI Approved :: MIT License
Operating System
- OS Independent
Programming Language
- Python :: 3
- Rust
Topic
- System :: Filesystems

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0.0.5

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ext4-cli 0.0.4

ext4-cli

Quick start

Installation

From crates.io

From PyPI

From Homebrew

From GitHub releases

Usage

Commands

ls — list directory contents

cat — print file contents

cp — extract files

stat — show file metadata

info — show filesystem metadata

Raw block devices (macOS)

Exit codes

Development

License

Project links

Key dates

1 maintainer

Credits

License

Requires

Classifiers

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`ls` — list directory contents

`cat` — print file contents

`cp` — extract files

`stat` — show file metadata

`info` — show filesystem metadata