Add permissions to the filesystem, preliminary permissions to the syscalls

programs/coreutils

@@ -1 +1 @@
-Subproject commit 648a0d119aaed8f4cf8c856e05e47da421c4074a
+Subproject commit fe104e72ea1d756556e0d6d98158713f6c3a8a38

programs/extrautils

@@ -1 +1 @@
-Subproject commit 6f0ef493c9f48f7b0c8dfe7c2a9a029f68fdda19
+Subproject commit d6c122a94cd760819f139f2af6ea22e4f4b17151

programs/getty/src/main.rs

@@ -2,8 +2,7 @@
 
 extern crate syscall;
 
-use std::fs::File;
-use std::io::{Read, Write};
+use std::io::Write;
 use std::process::Command;
 use std::{env, io, str, thread};
 

programs/id/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "id"
+version = "0.1.0"
+
+[dependencies]
+syscall = { path = "../../syscall/" }

programs/id/src/main.rs

@@ -0,0 +1,11 @@
+#![feature(question_mark)]
+
+extern crate syscall;
+
+use std::env;
+
+pub fn main() {
+    let uid = syscall::getuid().expect("id: failed to get UID");
+    let gid = syscall::getgid().expect("id: failed to get GID");
+    println!("uid={}({}) gid={}({})", uid, env::var("USER").unwrap_or(String::new()), gid, "");
+}

programs/login/src/main.rs

@@ -7,15 +7,15 @@ use octavo::octavo_digest::Digest;
 use octavo::octavo_digest::sha3::Sha512;
 use std::fs::File;
 use std::io::{Read, Write};
-use std::process::Command;
-use std::{env, io, str, thread};
+use std::process::{Command, CommandExt};
+use std::{io, str};
 use termion::input::TermRead;
 
 pub struct Passwd<'a> {
     user: &'a str,
     hash: &'a str,
-    uid: usize,
-    gid: usize,
+    uid: u32,
+    gid: u32,
     name: &'a str,
     home: &'a str,
     shell: &'a str
@@ -27,8 +27,8 @@ impl<'a> Passwd<'a> {
 
         let user = parts.next().ok_or(())?;
         let hash = parts.next().ok_or(())?;
-        let uid = parts.next().ok_or(())?.parse::<usize>().or(Err(()))?;
-        let gid = parts.next().ok_or(())?.parse::<usize>().or(Err(()))?;
+        let uid = parts.next().ok_or(())?.parse::<u32>().or(Err(()))?;
+        let gid = parts.next().ok_or(())?.parse::<u32>().or(Err(()))?;
         let name = parts.next().ok_or(())?;
         let home = parts.next().ok_or(())?;
         let shell = parts.next().ok_or(())?;
@@ -118,7 +118,10 @@ pub fn main() {
 
                 let mut command = Command::new(passwd.shell);
 
-                env::set_current_dir(passwd.home).unwrap();
+                command.uid(passwd.uid);
+                command.gid(passwd.gid);
+
+                command.current_dir(passwd.home);
 
                 command.env("USER", &user);
                 command.env("HOME", passwd.home);