Struct daemonize_me::Daemon

pub struct Daemon { /* fields omitted */ }

Basic daemonization consists of: forking the process, getting a new sid, setting the umask, changing the standard io streams to files and finally dropping privileges.

Options:

• user [optional], if set will drop privileges to the specified user NOTE: This library is strict and makes no assumptions if you provide a user you must provide a group
• group [optional(see note on user)], if set will drop privileges to specified group
• umask [optional], umask for the process defaults to 0o027
• pid_file [optional], if set a pid file will be created default is that no file is created ^*
• stdio [optional][recommended], this determines where standard output will be piped to since daemons have no console it's highly recommended to set this
• stderr [optional][recommended], same as above but for standard error
• chdir [optional], default is "/"

^* See the setter function documentation for more details

Beware there is no escalation back if dropping privileges TODO:

• [ ] Add chroot option
• [ ] Add before drop lambda

Implementations

impl Daemon

pub fn new() -> Self

pub fn pid_file<T: AsRef<Path>>(self, path: T, chmod: Option<bool>) -> Self

This is a setter to give your daemon a pid file

Arguments

• path - path to the file suggested /var/run/my_program_name.pid
• chmod - if set a chmod of the file to the user and group passed will be attempted (this being true makes setting an user and group mandatory)

pub fn work_dir<T: AsRef<Path>>(self, path: T) -> Self

As the last step the code will change the working directory to this one defaults to /

pub fn user<T: Into<User>>(self, user: T) -> Self

The code will attempt to drop privileges with setuid to the provided user

pub fn group<T: Into<Group>>(self, group: T) -> Self

The code will attempt to drop privileges with setgid to the provided group, you mut provide a group if you provide an user

pub fn umask(self, mask: u16) -> Self

pub fn stdin<T: Into<Stdio>>(self, stdio: T) -> Self

pub fn stdout<T: Into<Stdio>>(self, stdio: T) -> Self

pub fn stderr<T: Into<Stdio>>(self, stdio: T) -> Self

pub fn start(self) -> Result<()>