proot-me/proot
Freechroot, mount --bind, and binfmt_misc without privilege/setup for Linux
FreeFree tier
About proot-me/proot
PRoot is a Linux utility that enables chroot, mount --bind, and binfmt_misc operations without requiring root privileges or system setup. It leverages the ptrace system call to intercept and modify syscalls, allowing users to run programs in an isolated filesystem environment (similar to a chroot jail) as a regular user. PRoot also supports transparent cross-architecture execution via binfmt_misc, making it a lightweight alternative to full containerization for development, testing, and sandboxing purposes. The project is open-source under GPL-2.0 and is actively maintained with a community forum and mailing list.
Key Features
chroot without root privileges
mount --bind without root privileges
binfmt_misc without root privileges
ptrace-based syscall interception
User-space execution (userland-exec)
Cross-architecture support via binfmt_misc
Open-source (GPL-2.0) with community support
Pros & Cons
Pros
- No root privileges required
- No kernel modifications or setup needed
- Lightweight compared to full containerization
- Supports multiple Linux architectures via binfmt_misc
- Active open-source community and documentation
Cons
- Performance overhead due to ptrace syscall interception
- Linux-only; not available on other operating systems
- Limited isolation compared to containers or VMs
- Complex configuration for advanced use cases
Best For
Running applications in an isolated filesystem without root accessCross-architecture binary execution (e.g., ARM binaries on x86)Testing software in restricted environments without full containersPortable development environments for Linux systems
FAQ
What is PRoot and how does it work?
PRoot is a Linux tool that provides chroot, mount --bind, and binfmt_misc functionality without requiring root privileges. It works by using the ptrace system call to intercept and modify system calls made by the traced process, creating an isolated filesystem environment transparently.
How do I compile PRoot from source?
To compile PRoot, run 'make -C src loader.elf loader-m32.elf build.h' to build the loader, then 'make -C src proot care' to compile both PRoot and CARE. Dependencies include libarchive, libtalloc, and uthash (the latter only for CARE). The test suite can be run with 'make -C test'.
Is PRoot free to use?
Yes, PRoot is free and open-source software licensed under GPL-2.0 or later. It has no pricing and does not require any paid account or subscription.