doas

A Rust implementation of doas, an alternative to sudo for running commands as other users.

Features

• Simple configuration file syntax
• Supports permit/deny rules with options like nopass, keepenv
• PAM authentication
• Unix-like systems only

Installation

1. Build the project:

   cargo build --release
   
   

2. Install the binary:

   sudo cp target/release/doas /usr/local/bin/
   
   sudo chown root:root /usr/local/bin/doas
   
   sudo chmod 4755 /usr/local/bin/doas
   
   

3. Create config file:

   sudo mkdir -p /usr/local/etc
   
   sudo cp doas.conf.sample /usr/local/etc/doas.conf
   
   sudo chown root:root /usr/local/etc/doas.conf
   
   sudo chmod 600 /usr/local/etc/doas.conf
   
   

4. Edit the config file to add rules, e.g.:

   permit yourusername as root
   

Usage

doas command [args...]

doas -u user command [args...]

Configuration

The config file is located at /etc/doas.conf or /usr/local/etc/doas.conf.

Syntax:

permit [nopass] [keepenv] [nolog] identity as target

• permit or deny
• nopass: no password required
• keepenv: keep environment variables
• nolog: don't log
• identity: the user who can run
• target: the user to run as

Security

The binary must be setuid root to function properly. Ensure the config file is only readable by root.