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raou is a lightweight sudo-like tool for Linux. It allows a user to execute programs as another user without entering the password. However, the programs (including the parameters) a user can run are explicitly specified by the administrator.
Originally written in C, it's now reimplemented in Rust.
When to use raou (over sudo)
Generally, it's not a replacement for sudo. The primary use case of raou is a situation in which you would want to allow a user to run a privileged operation as root without entering passwords. You may not want to use sudo for that, particularly if you don't have it installed already. Some further arguments for raou:
- Simpler config
- Less complexity, less attack surface
- Writte in a memory-safe language
By default, raou looks in
/etc/raou.d/ for config files. If you run
"raou backup", it will look for
Example config file:
user john target_user root path /usr/local/bin/script.sh
user is the name of the user who you want to give permissions to execute path as the target_user.
path must contain the absolute path of the to be executed command.
args (string): If you want to leave out optional arguments (argv) to path, simply don't include this. Otherwise, specify them here.
... args -v -ltr
allow_args (1 or 0, default 0): Allow arbitrary arguments, so:
raou backup /path
Will execute the command specified in path of the
backup entry with "/path" as argv instead of the argument specified with "args" in the config file.
no_new_privs (1 or 0, default 1): Processes launched with this option active won't be able to gain more privileges, even when they call setuid programs. This can break some programs.
env_vars (string): A comma-separated list of environment variables to inherit from the current environment. Everything else will be wiped (but others like HOME, SHELL etc. will be appropriately set).
argv0 (string): Set this option if you want to provide your own value as "argv0" The default is the name of the launched binary (not the whole path).