remove void crate

Cargo.toml

@@ -14,7 +14,6 @@ argparse = "0.2.*"
 log = "0.4.*"
 libc = "0.2.*"
 parking_lot = "0.11.*"
-void = "1.0.*"
 nix = "0.19.*"
 #cntr-fuse = "0.3.*"
 

src/attach/child.rs

@@ -9,7 +9,6 @@ use std::fs::File;
 use std::os::unix::io::IntoRawFd;
 use std::os::unix::prelude::*;
 use std::process;
-use void::Void;
 
 use crate::capabilities;
 use crate::cgroup;
@@ -34,7 +33,7 @@ pub struct ChildOptions<'a> {
     pub gid: Gid,
 }
 
-pub fn run(options: &ChildOptions) -> Result<Void> {
+pub fn run(options: &ChildOptions) -> Result<()> {
     let lsm_profile = tryfmt!(
         lsm::read_profile(options.process_status.global_pid),
         "failed to get lsm profile"

src/attach/mod.rs

@@ -1,7 +1,6 @@
 use nix::unistd::{self, ForkResult};
 use std::fs::{create_dir_all, metadata};
 use std::os::unix::prelude::*;
-use void::Void;
 
 use crate::container;
 use crate::dotcntr;
@@ -23,7 +22,7 @@ pub struct AttachOptions {
     pub effective_user: Option<Passwd>,
 }
 
-pub fn attach(opts: &AttachOptions) -> Result<Void> {
+pub fn attach(opts: &AttachOptions) -> Result<()> {
     let container_pid = tryfmt!(
         container::lookup_container_pid(opts.container_name.as_str(), &opts.container_types),
         ""

src/attach/parent.rs

@@ -4,15 +4,14 @@ use nix::unistd::Pid;
 use nix::{cmsg_space, unistd};
 use std::os::unix::io::RawFd;
 use std::process;
-use void::Void;
 
 use crate::fs;
 use crate::ipc;
 use crate::mountns;
 use crate::pty;
 use crate::types::{Error, Result};
 
-pub fn run(pid: Pid, mount_ready_sock: &ipc::Socket, fs: fs::CntrFs) -> Result<Void> {
+pub fn run(pid: Pid, mount_ready_sock: &ipc::Socket, fs: fs::CntrFs) -> Result<()> {
     let ns = tryfmt!(
         mountns::MountNamespace::receive(mount_ready_sock),
         "failed to receive mount namespace from child"