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use std::ffi::{OsString, OsStr};
use std::io;
use std::path::{Path, PathBuf};
use std::process::{Command, Child, Stdio};
/// An OpenVPN process builder, providing control over the different arguments that the OpenVPN
/// binary accepts.
pub struct OpenVpnBuilder {
openvpn_bin: OsString,
config: Option<PathBuf>,
}
impl OpenVpnBuilder {
/// Constructs a new `OpenVpnBuilder` for launching OpenVPN processes from the binary at
/// `openvpn_bin`.
pub fn new<P: AsRef<OsStr>>(openvpn_bin: P) -> Self {
OpenVpnBuilder {
openvpn_bin: OsString::from(openvpn_bin.as_ref()),
config: None,
}
}
/// Sets what configuration file will be given to OpenVPN
pub fn config<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
self.config = Some(path.as_ref().to_path_buf());
self
}
/// Executes the OpenVPN process as a child process, returning a handle to it.
pub fn spawn(&mut self) -> io::Result<Child> {
let mut command = self.create_command();
self.apply_settings(&mut command);
command.spawn()
}
fn create_command(&mut self) -> Command {
let mut command = Command::new(&self.openvpn_bin);
command.env_clear()
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::null());
command
}
fn apply_settings(&self, command: &mut Command) {
if let Some(ref config) = self.config {
command.arg("--config").arg(config);
}
}
}
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