fork

Library for creating a new process detached from the controling terminal (daemon) using the fork and setsid syscalls.

Why?

• daemon(3) has been deprecated in MacOSX 10.5, by using fork and setsid new methods could be created to achieve the same goal, inspired by "nix - Rust friendly bindings to *nix APIs crate".
• Minimal library to daemonize, fork, double-fork a process
• Learn Rust :crab:

Example:

```rs use fork::{daemon, Fork}; use std::process::Command;

fn main() { if let Ok(Fork::Child) = daemon(true, true) { Command::new("sleep") .arg("300") .output() .expect("failed to execute process"); } } ```

If using daemon(true, true),it will chdir to / and close the standard input, standard output, and standard error file descriptors.

pre $ ps -axo ppid,pid,pgid,sess,tty,tpgid,stat,uid,%mem,%cpu,command, | egrep "fork|sleep|PID" PPID PID PGID SESS TTY TPGID STAT UID %MEM %CPU COMMAND 1 48738 48737 0 ?? 0 S 501 0.0 0.0 target/debug/fork 48738 48753 48737 0 ?? 0 S 501 0.0 0.0 sleep 300