diff --git a/Cargo.lock b/Cargo.lock
index 80f63c8bee..10466defa2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -15,39 +15,36 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "arrayvec"
-version = "0.4.11"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "atty"
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace"
-version = "0.3.38"
+version = "0.3.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.31"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -60,22 +57,22 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "blake2b_simd"
-version = "0.5.8"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "constant_time_eq 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bytecount"
-version = "0.1.7"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -85,7 +82,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.45"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -100,7 +97,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -112,7 +109,7 @@ name = "cloudabi"
 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -129,6 +126,11 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "either"
+version = "1.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "extra"
 version = "0.1.0"
@@ -136,22 +138,22 @@ source = "git+https://gitlab.redox-os.org/redox-os/libextra.git#0b50f3f2127fa62b
 
 [[package]]
 name = "failure"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "failure_derive"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
- "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -159,6 +161,14 @@ name = "fuchsia-cprng"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "itertools"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -166,22 +176,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.62"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "liner"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytecount 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "nodrop"
-version = "0.1.13"
+version = "0.2.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -191,18 +186,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.30"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "quote"
-version = "0.6.13"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -225,7 +220,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -239,6 +234,17 @@ dependencies = [
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "redox_liner"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bytecount 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.1.56"
@@ -257,7 +263,7 @@ name = "redox_users"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-argon2 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -269,7 +275,7 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "blake2b_simd 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2b_simd 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -285,31 +291,31 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "0.15.44"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "synstructure"
-version = "0.10.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "termion"
-version = "1.5.3"
+version = "1.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "numtoa 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -330,7 +336,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicode-xid"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -339,11 +345,11 @@ version = "0.1.0"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "extra 0.1.0 (git+https://gitlab.redox-os.org/redox-os/libextra.git)",
- "liner 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_liner 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_users 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -373,48 +379,49 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
index f878c2829f..d3e84904a7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -53,7 +53,7 @@ path = "src/bin/usermod.rs"
 [dependencies]
 clap = "2.33.0"
 extra = { git = "https://gitlab.redox-os.org/redox-os/libextra.git" }
-liner = "0.4.4"
+redox_liner = "0.5.1"
 redox_syscall = "0.1.56"
 redox_termios = "0.1.1"
 redox_users = "0.3.1"
diff --git a/src/bin/getty.rs b/src/bin/getty.rs
index 4a79f9948b..e70f5c33c1 100644
--- a/src/bin/getty.rs
+++ b/src/bin/getty.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate redox_termios;
diff --git a/src/bin/groupadd.rs b/src/bin/groupadd.rs
index e4feabc40d..d15a1372e4 100644
--- a/src/bin/groupadd.rs
+++ b/src/bin/groupadd.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/groupdel.rs b/src/bin/groupdel.rs
index 440b9d9ae9..af3083ab5e 100644
--- a/src/bin/groupdel.rs
+++ b/src/bin/groupdel.rs
@@ -1,5 +1,3 @@
-#[deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/groupmod.rs b/src/bin/groupmod.rs
index 05b166386d..5967923071 100644
--- a/src/bin/groupmod.rs
+++ b/src/bin/groupmod.rs
@@ -1,5 +1,3 @@
-#[deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/id.rs b/src/bin/id.rs
index 731418e26b..5f389d5b0c 100644
--- a/src/bin/id.rs
+++ b/src/bin/id.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/login.rs b/src/bin/login.rs
index 837217c24f..b18cf0b8bf 100644
--- a/src/bin/login.rs
+++ b/src/bin/login.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
@@ -55,7 +53,11 @@ pub fn main() {
 
     loop {
         let user = liner::Context::new()
-            .read_line("\x1B[1mredox login:\x1B[0m ", &mut |_| {})
+            .read_line(
+                "\x1B[1mredox login:\x1B[0m ",
+                None,
+                &mut liner::BasicCompleter::new(Vec::<String>::new())
+            )
             .try(&mut stderr);
 
         if !user.is_empty() {
@@ -101,7 +103,7 @@ pub fn main() {
             }
         } else {
             stdout.write(b"\n").try(&mut stderr);
-            stdout.flush().try(&mut stderr);;
+            stdout.flush().try(&mut stderr);
         }
     }
 }
diff --git a/src/bin/passwd.rs b/src/bin/passwd.rs
index 7f82ca0ca6..ebeeea7305 100644
--- a/src/bin/passwd.rs
+++ b/src/bin/passwd.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
@@ -98,8 +96,8 @@ fn main() {
             }
 
             if verified {
-                stdout.write_all(b"new password: ").try(&mut stderr);;
-                stdout.flush().try(&mut stderr);;
+                stdout.write_all(b"new password: ").try(&mut stderr);
+                stdout.flush().try(&mut stderr);
 
                 if let Some(new_password) = stdin.read_passwd(&mut stdout).try(&mut stderr) {
                     stdout.write(b"\nconfirm password: ").try(&mut stderr);
@@ -107,7 +105,7 @@ fn main() {
 
                     if let Some(confirm_password) = stdin.read_passwd(&mut stdout).try(&mut stderr) {
                         stdout.write(b"\n").try(&mut stderr);
-                        stdout.flush().try(&mut stderr);;
+                        stdout.flush().try(&mut stderr);
 
                         if new_password == confirm_password {
                             user.set_passwd(&new_password).unwrap_or_exit(1);
diff --git a/src/bin/su.rs b/src/bin/su.rs
index 18d223248b..5595437ebd 100644
--- a/src/bin/su.rs
+++ b/src/bin/su.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/sudo.rs b/src/bin/sudo.rs
index 1186fed990..1bfd2f09d7 100644
--- a/src/bin/sudo.rs
+++ b/src/bin/sudo.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 extern crate extra;
 extern crate syscall;
 extern crate termion;
diff --git a/src/bin/useradd.rs b/src/bin/useradd.rs
index 53e80bd9f9..bb6d91fab4 100644
--- a/src/bin/useradd.rs
+++ b/src/bin/useradd.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/userdel.rs b/src/bin/userdel.rs
index 6c89785398..99f0024e13 100644
--- a/src/bin/userdel.rs
+++ b/src/bin/userdel.rs
@@ -1,5 +1,3 @@
-#[deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;
diff --git a/src/bin/usermod.rs b/src/bin/usermod.rs
index ed7c02bd6a..b912231f6d 100644
--- a/src/bin/usermod.rs
+++ b/src/bin/usermod.rs
@@ -1,5 +1,3 @@
-#![deny(warnings)]
-
 #[macro_use]
 extern crate clap;
 extern crate extra;