diff --git a/Cargo.lock b/Cargo.lock
index b69becf5443ba5bfc82ef60de2acc639d5ccb7b2..d965c3153112d3f2ef0d8065ce64d526513aae91 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -25,19 +25,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "cbindgen"
 version = "0.5.2"
 dependencies = [
- "clap 2.31.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.31.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "standalone-syn 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempdir 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "cc"
-version = "1.0.7"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -47,7 +47,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "clap"
-version = "2.31.1"
+version = "2.31.2"
 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)",
@@ -62,7 +62,7 @@ dependencies = [
 [[package]]
 name = "compiler_builtins"
 version = "0.1.0"
-source = "git+https://github.com/rust-lang-nursery/compiler-builtins.git#8fe94f3553f92cd6ba21aadc852bd6a3e01194db"
+source = "git+https://github.com/rust-lang-nursery/compiler-builtins.git#263a703b10351d8930e48045b4fd09768991b867"
 
 [[package]]
 name = "crt0"
@@ -145,21 +145,13 @@ version = "0.1.0"
 dependencies = [
  "cbindgen 0.5.2",
  "platform 0.1.0",
+ "socket 0.1.0",
 ]
 
 [[package]]
 name = "itoa"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "kernel32-sys"
-version = "0.2.2"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "libc"
@@ -199,7 +191,7 @@ dependencies = [
 
 [[package]]
 name = "num-traits"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -293,11 +285,10 @@ dependencies = [
 
 [[package]]
 name = "remove_dir_all"
-version = "0.3.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -324,7 +315,7 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.32"
+version = "1.0.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -351,13 +342,13 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.11"
+version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -467,11 +458,11 @@ dependencies = [
 
 [[package]]
 name = "tempdir"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "remove_dir_all 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "remove_dir_all 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -505,7 +496,7 @@ name = "toml"
 version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -534,6 +525,8 @@ version = "0.1.0"
 dependencies = [
  "cbindgen 0.5.2",
  "platform 0.1.0",
+ "stdio 0.1.0",
+ "string 0.1.0",
 ]
 
 [[package]]
@@ -547,7 +540,7 @@ dependencies = [
 name = "va_list-helper"
 version = "0.0.2"
 dependencies = [
- "cc 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -572,11 +565,6 @@ dependencies = [
  "platform 0.1.0",
 ]
 
-[[package]]
-name = "winapi"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "winapi"
 version = "0.3.4"
@@ -586,11 +574,6 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "winapi-build"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
@@ -605,36 +588,35 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 "checksum atty 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "af80143d6f7608d746df1520709e5d141c96f240b0e62b0aa41bdfb53374d9d4"
 "checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
-"checksum cc 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "87f38f122db5615319a985757e526c00161d924d19b71a0f3e80c52bab1adcf6"
+"checksum cc 1.0.9 (registry+https://github.com/rust-lang/crates.io-index)" = "2b4911e4bdcb4100c7680e7e854ff38e23f1b34d4d9e079efae3da2801341ffc"
 "checksum cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
-"checksum clap 2.31.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5dc18f6f4005132120d9711636b32c46a233fad94df6217fa1d81c5e97a9f200"
+"checksum clap 2.31.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f0f16b89cbb9ee36d87483dc939fe9f1e13c05898d56d7b230a0d4dff033a536"
 "checksum compiler_builtins 0.1.0 (git+https://github.com/rust-lang-nursery/compiler-builtins.git)" = "<none>"
 "checksum dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "09c3753c3db574d215cba4ea76018483895d7bff25a31b49ba45db21c48e50ab"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
-"checksum itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8324a32baf01e2ae060e9de58ed0bc2320c9a2833491ee36cd3b4c414de4db8c"
-"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
+"checksum itoa 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "92a9df60778f789c37f76778ae8d0a2471c41baa8b059d98a5873c978f549587"
 "checksum libc 0.2.39 (registry+https://github.com/rust-lang/crates.io-index)" = "f54263ad99207254cf58b5f701ecb432c717445ea2ee8af387334bdd1a03fdff"
 "checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
 "checksum log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "89f010e843f2b1a31dbd316b3b8d443758bc634bed37aabade59c686d644e0a2"
-"checksum num-traits 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b3c2bd9b9d21e48e956b763c9f37134dc62d9e95da6edb3f672cacb6caf3cd3"
+"checksum num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dee092fcdf725aee04dd7da1d21debff559237d49ef1cb3e69bcb8ece44c7364"
 "checksum proc-macro2 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "cd07deb3c6d1d9ff827999c7f9b04cdfd66b1b17ae508e14fe47b620f2282ae0"
 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
 "checksum rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eba5f8cb59cc50ed56be8880a5c7b496bfd9bd26394e176bc67884094145c2c5"
 "checksum redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "0d92eecebad22b767915e4d529f89f28ee96dbbf5a4810d2b844373f136417fd"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
-"checksum remove_dir_all 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b5d2f806b0fcdabd98acd380dc8daef485e22bcb7cddc811d1337967f2528cf5"
+"checksum remove_dir_all 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dfc5b3ce5d5ea144bb04ebd093a9e14e9765bcfec866aecda9b6dec43b3d1e24"
 "checksum sc 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4ebbb026ba4a707c25caec2db5ef59ad8b41f7ad77cad06257e06229c891f376"
-"checksum serde 1.0.32 (registry+https://github.com/rust-lang/crates.io-index)" = "c73f63e08b33f6e59dfb3365b009897ebc3a3edc4af6e4f3ce8e483cf3d80ce7"
+"checksum serde 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)" = "4fe95aa0d46f04ce5c3a88bdcd4114ecd6144ed0b2725ebca2f1127744357807"
 "checksum serde_derive 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)" = "652bc323d694dc925829725ec6c890156d8e70ae5202919869cb00fe2eff3788"
 "checksum serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32f1926285523b2db55df263d2aa4eb69ddcfa7a7eade6430323637866b513ab"
-"checksum serde_json 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "fab6c4d75bedcf880711c85e39ebf8ccc70d0eba259899047ec5d7436643ee17"
+"checksum serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)" = "5c508584d9913df116b91505eec55610a2f5b16e9ed793c46e4d0152872b3e74"
 "checksum standalone-quote 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dcedac1d6d98e7e9d1d6e628f5635af9566688ae5f6cea70a3976f495ae8d839"
 "checksum standalone-syn 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "115808f5187c07c23cb93eee49d542fae54c6e8285d3a24c6ff683fcde9243db"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
-"checksum tempdir 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "f73eebdb68c14bcb24aef74ea96079830e7fa7b31a6106e42ea7ee887c1e134e"
+"checksum tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
 "checksum textwrap 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c0b59b6b4b44d867f1370ef1bd91bfb262bf07bf0ae65c202ea2fbc16153b693"
 "checksum toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)" = "a7540f4ffc193e0d3c94121edb19b055670d369f77d5804db11ae053a45b6e7e"
@@ -643,8 +625,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum vec_map 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "887b5b631c2ad01628bbbaa7dd4c869f80d3186688f8d0b6f58774fbe324988c"
-"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "04e3bd221fcbe8a271359c04f21a76db7d0c6028862d1bb5512d85e1e2eb5bb3"
-"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/src/fcntl/src/linux.rs b/src/fcntl/src/linux.rs
index fd68ffcf14c01e6adfcfaf4f34bb9412e65bd7d2..ce9499aab713cf36142986d781e8d9ef4b4cc076 100644
--- a/src/fcntl/src/linux.rs
+++ b/src/fcntl/src/linux.rs
@@ -6,3 +6,6 @@ pub const O_RDWR: c_int = 0x0002;
 pub const O_CREAT: c_int = 0x0040;
 pub const O_TRUNC: c_int = 0x0200;
 pub const O_ACCMODE: c_int = O_RDONLY | O_WRONLY | O_RDWR;
+pub const O_APPEND: c_int = 0o2000;
+pub const O_CLOEXEC: c_int = 0o2_000_000;
+pub const O_EXCL: c_int = 0o200;
diff --git a/src/platform/src/lib.rs b/src/platform/src/lib.rs
index 63732fbf61129c399658e8488e78c2ce0711e735..24fd605a2fc735a1046fbd6a54eed849216e8a0a 100644
--- a/src/platform/src/lib.rs
+++ b/src/platform/src/lib.rs
@@ -61,8 +61,8 @@ pub unsafe fn cstr_from_bytes_with_nul_unchecked(bytes: &[u8]) -> *const c_char
 pub struct FileWriter(pub c_int);
 
 impl FileWriter {
-    pub fn write(&mut self, buf: &[u8]) {
-        write(self.0, buf);
+    pub fn write(&mut self, buf: &[u8]) -> isize {
+        write(self.0, buf)
     }
 }
 
@@ -73,6 +73,14 @@ impl fmt::Write for FileWriter {
     }
 }
 
+pub struct FileReader(pub c_int);
+
+impl FileReader {
+    pub fn read(&mut self, buf: &mut [u8]) -> isize {
+        read(self.0, buf)
+    }
+}
+
 pub struct StringWriter(pub *mut u8, pub usize);
 
 impl StringWriter {
diff --git a/src/platform/src/linux/mod.rs b/src/platform/src/linux/mod.rs
index 7bf42be63d217a630330f19474e49e87a3739f76..bf9a6169b3435a67af4fbf25c7dc9dc52331cd72 100644
--- a/src/platform/src/linux/mod.rs
+++ b/src/platform/src/linux/mod.rs
@@ -130,10 +130,22 @@ pub fn getuid() -> uid_t {
     e(unsafe { syscall!(GETUID) })
 }
 
+pub fn kill(pid: pid_t, sig: c_int) -> c_int {
+    e(unsafe { syscall!(KILL, pid, sig) }) as c_int
+}
+
+pub fn killpg(pgrp: pid_t, sig: c_int) -> c_int {
+    e(unsafe { syscall!(KILL, -(pgrp as isize) as pid_t, sig) }) as c_int
+}
+
 pub fn link(path1: *const c_char, path2: *const c_char) -> c_int {
     e(unsafe { syscall!(LINKAT, AT_FDCWD, path1, AT_FDCWD, path2, 0) }) as c_int
 }
 
+pub fn lseek(fildes: c_int, offset: off_t, whence: c_int) -> off_t {
+    e(unsafe { syscall!(LSEEK, fildes, offset, whence) }) as off_t
+}
+
 pub fn lstat(file: *const c_char, buf: *mut stat) -> c_int {
     e(unsafe { syscall!(NEWFSTATAT, AT_FDCWD, file, buf, AT_SYMLINK_NOFOLLOW) }) as c_int
 }
@@ -193,3 +205,7 @@ pub fn waitpid(pid: pid_t, stat_loc: *mut c_int, options: c_int) -> pid_t {
 pub fn write(fildes: c_int, buf: &[u8]) -> ssize_t {
     e(unsafe { syscall!(WRITE, fildes, buf.as_ptr(), buf.len()) }) as ssize_t
 }
+
+pub fn clock_gettime(clk_id: clockid_t, tp: *mut timespec) -> c_int {
+    e(unsafe { syscall!(CLOCK_GETTIME, clk_id, tp) }) as c_int
+}
diff --git a/src/platform/src/redox/mod.rs b/src/platform/src/redox/mod.rs
index 4155f6276081f084c9da3c2023b192f0c63d2d89..03c4b5cf5fd0a65ca128a3d106e222ec07204fc1 100644
--- a/src/platform/src/redox/mod.rs
+++ b/src/platform/src/redox/mod.rs
@@ -168,12 +168,28 @@ pub fn getuid() -> uid_t {
     e(syscall::getuid()) as pid_t
 }
 
+pub fn kill(pid: pid_t, sig: c_int) -> c_int {
+    e(syscall::kill(pid, sig as usize)) as c_int
+}
+
+pub fn killpg(pgrp: pid_t, sig: c_int) -> c_int {
+    e(syscall::kill(-(pgrp as isize) as pid_t, sig as usize)) as c_int
+}
+
 pub fn link(path1: *const c_char, path2: *const c_char) -> c_int {
     let path1 = unsafe { c_str(path1) };
     let path2 = unsafe { c_str(path2) };
     e(unsafe { syscall::link(path1.as_ptr(), path2.as_ptr()) }) as c_int
 }
 
+pub fn lseek(fd: c_int, offset: off_t, whence: c_int) -> off_t {
+    e(syscall::lseek(
+        fd as usize,
+        offset as isize,
+        whence as usize,
+    )) as off_t
+}
+
 pub fn lstat(path: *const c_char, buf: *mut stat) -> c_int {
     let path = unsafe { c_str(path) };
     match syscall::open(path, O_RDONLY | O_NOFOLLOW) {
@@ -184,7 +200,6 @@ pub fn lstat(path: *const c_char, buf: *mut stat) -> c_int {
             res
         }
     }
-}
 
 pub fn mkdir(path: *const c_char, mode: mode_t) -> c_int {
     let flags = O_CREAT | O_EXCL | O_CLOEXEC | O_DIRECTORY | mode as usize & 0o777;
@@ -297,3 +312,17 @@ pub fn waitpid(pid: pid_t, stat_loc: *mut c_int, options: c_int) -> pid_t {
 pub fn write(fd: c_int, buf: &[u8]) -> ssize_t {
     e(syscall::write(fd as usize, buf)) as ssize_t
 }
+
+pub fn clock_gettime(clk_id: clockid_t, tp: *mut timespec) -> c_int {
+    let mut redox_tp = unsafe { redox_timespec::from(&*tp) };
+    match e(syscall::clock_gettime(clk_id as usize, &mut redox_tp)) as c_int {
+        -1 => -1,
+        _ => {
+            unsafe {
+                (*tp).tv_sec = redox_tp.tv_sec;
+                (*tp).tv_nsec = redox_tp.tv_nsec as i64;
+            };
+            0
+        }
+    }
+}
diff --git a/src/platform/src/types.rs b/src/platform/src/types.rs
index f721d674e0b7449ff3ee141ea91f31f29de9aece..1993edbe18af4952acf7e197fa7b293d40dbd9f6 100644
--- a/src/platform/src/types.rs
+++ b/src/platform/src/types.rs
@@ -68,6 +68,7 @@ pub type clockid_t = i32;
 pub type timer_t = c_void;
 
 #[repr(C)]
+#[derive(Default)]
 pub struct timespec {
     pub tv_sec: time_t,
     pub tv_nsec: c_long,
diff --git a/src/signal/src/lib.rs b/src/signal/src/lib.rs
index 052cb13770eb2790ff5d12953652e06ddb42b2fc..031b8e4836cb844c1766b1fb57a5b6e43c235a6a 100644
--- a/src/signal/src/lib.rs
+++ b/src/signal/src/lib.rs
@@ -27,12 +27,12 @@ pub type sigset_t = sys_sigset_t;
 
 #[no_mangle]
 pub extern "C" fn kill(pid: pid_t, sig: c_int) -> c_int {
-    unimplemented!();
+    platform::kill(pid, sig)
 }
 
 #[no_mangle]
 pub extern "C" fn killpg(pgrp: pid_t, sig: c_int) -> c_int {
-    unimplemented!();
+    platform::killpg(pgrp, sig)
 }
 
 #[no_mangle]
diff --git a/src/stdio/Cargo.toml b/src/stdio/Cargo.toml
index 2f53e58dc70578c5c48c0a96c5bb6fb83b1c62ca..1a920812a6a730a62b6a53efa6b8ca42faa0ed44 100644
--- a/src/stdio/Cargo.toml
+++ b/src/stdio/Cargo.toml
@@ -8,6 +8,10 @@ build = "build.rs"
 cbindgen = { path = "../../cbindgen" }
 
 [dependencies]
+compiler_builtins = { git = "https://github.com/rust-lang-nursery/compiler-builtins.git", default-features = false, features = ["mem"] }
 platform = { path = "../platform" }
 va_list = { path = "../../va_list", features = ["no_std"] }
+fcntl = { path = "../fcntl" }
+string = { path = "../string" }
+stdlib = { path = "../stdlib" }
 errno = { path = "../errno"}
diff --git a/src/stdio/cbindgen.toml b/src/stdio/cbindgen.toml
index 58483d52ac51ae265ff8f156bb26a8800dc8250e..3f13ef55cb66b092e669e76578cce789ee7899ab 100644
--- a/src/stdio/cbindgen.toml
+++ b/src/stdio/cbindgen.toml
@@ -5,3 +5,6 @@ language = "C"
 
 [enum]
 prefix_with_name = true
+
+[export.rename]
+"AtomicBool" = "volatile char"
diff --git a/src/stdio/src/constants.rs b/src/stdio/src/constants.rs
new file mode 100644
index 0000000000000000000000000000000000000000..c601cbc85e3d07206b6dfdaa0314dfe870b58771
--- /dev/null
+++ b/src/stdio/src/constants.rs
@@ -0,0 +1,27 @@
+use platform::types::*;
+
+pub const BUFSIZ: size_t = 1024;
+
+pub const UNGET: size_t = 8;
+
+pub const FILENAME_MAX: c_int = 4096;
+
+pub const F_PERM: c_int = 1;
+pub const F_NORD: c_int = 4;
+pub const F_NOWR: c_int = 8;
+pub const F_EOF: c_int = 16;
+pub const F_ERR: c_int = 32;
+pub const F_SVB: c_int = 64;
+pub const F_APP: c_int = 128;
+pub const F_BADJ: c_int = 256;
+
+pub const SEEK_SET: c_int = 0;
+pub const SEEK_CUR: c_int = 1;
+pub const SEEK_END: c_int = 2;
+
+pub const _IOFBF: c_int = 0;
+pub const _IOLBF: c_int = 1;
+pub const _IONBF: c_int = 2;
+
+#[allow(non_camel_case_types)]
+pub type fpos_t = off_t;
diff --git a/src/stdio/src/default.rs b/src/stdio/src/default.rs
new file mode 100644
index 0000000000000000000000000000000000000000..840a6fa07ff1ef76d945ff7997403e6b153d1f40
--- /dev/null
+++ b/src/stdio/src/default.rs
@@ -0,0 +1,76 @@
+use core::sync::atomic::AtomicBool;
+use core::ptr;
+use super::{constants, internal, BUFSIZ, FILE, UNGET};
+
+#[allow(non_upper_case_globals)]
+static mut default_stdin_buf: [u8; BUFSIZ as usize + UNGET] = [0; BUFSIZ as usize + UNGET];
+
+#[allow(non_upper_case_globals)]
+static mut default_stdin: FILE = FILE {
+    flags: constants::F_PERM | constants::F_NOWR | constants::F_BADJ,
+    rpos: ptr::null_mut(),
+    rend: ptr::null_mut(),
+    wend: ptr::null_mut(),
+    wpos: ptr::null_mut(),
+    wbase: ptr::null_mut(),
+    fd: 0,
+    buf: unsafe { &mut default_stdin_buf as *mut [u8] as *mut u8 },
+    buf_size: BUFSIZ as usize,
+    buf_char: -1,
+    unget: UNGET,
+    lock: AtomicBool::new(false),
+};
+
+#[allow(non_upper_case_globals)]
+static mut default_stdout_buf: [u8; BUFSIZ as usize] = [0; BUFSIZ as usize];
+
+#[allow(non_upper_case_globals)]
+static mut default_stdout: FILE = FILE {
+    flags: constants::F_PERM | constants::F_NORD | constants::F_BADJ,
+    rpos: ptr::null_mut(),
+    rend: ptr::null_mut(),
+    wend: ptr::null_mut(),
+    wpos: ptr::null_mut(),
+    wbase: ptr::null_mut(),
+    fd: 1,
+    buf: unsafe { &mut default_stdout_buf } as *mut [u8] as *mut u8,
+    buf_size: BUFSIZ as usize,
+    buf_char: b'\n' as i8,
+    unget: 0,
+    lock: AtomicBool::new(false),
+};
+
+#[allow(non_upper_case_globals)]
+static mut default_stderr_buf: [u8; BUFSIZ as usize] = [0; BUFSIZ as usize];
+
+#[allow(non_upper_case_globals)]
+static mut default_stderr: FILE = FILE {
+    flags: constants::F_PERM | constants::F_NORD | constants::F_BADJ,
+    rpos: ptr::null_mut(),
+    rend: ptr::null_mut(),
+    wend: ptr::null_mut(),
+    wpos: ptr::null_mut(),
+    wbase: ptr::null_mut(),
+    fd: 2,
+    buf: unsafe { &mut default_stderr_buf } as *mut [u8] as *mut u8,
+    buf_size: BUFSIZ as usize,
+    buf_char: -1,
+    unget: 0,
+    lock: AtomicBool::new(false),
+};
+
+// Don't ask me how the casting below works, I have no idea
+// " as *const FILE as *mut FILE" rust pls
+//
+// -- Tommoa
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut stdin: *mut FILE = unsafe { &default_stdin } as *const FILE as *mut FILE;
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut stdout: *mut FILE = unsafe { &default_stdout } as *const FILE as *mut FILE;
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut stderr: *mut FILE = unsafe { &default_stderr } as *const FILE as *mut FILE;
diff --git a/src/stdio/src/helpers.rs b/src/stdio/src/helpers.rs
new file mode 100644
index 0000000000000000000000000000000000000000..378d2af3b6cbdbc4d45b430b318a0abdcb7f59ca
--- /dev/null
+++ b/src/stdio/src/helpers.rs
@@ -0,0 +1,147 @@
+use super::{internal, BUFSIZ, FILE, UNGET};
+use stdlib::calloc;
+use core::{mem, ptr};
+use core::sync::atomic::AtomicBool;
+use platform::types::*;
+use super::constants::*;
+use fcntl::*;
+use platform;
+use errno;
+
+/// Parse mode flags as a string and output a mode flags integer
+pub unsafe fn parse_mode_flags(mode_str: *const c_char) -> i32 {
+    use string::strchr;
+    let mut flags = if !strchr(mode_str, b'+' as i32).is_null() {
+        O_RDWR
+    } else if (*mode_str) == b'r' as i8 {
+        O_RDONLY
+    } else {
+        O_WRONLY
+    };
+    if !strchr(mode_str, b'x' as i32).is_null() {
+        flags |= O_EXCL;
+    }
+    if !strchr(mode_str, b'e' as i32).is_null() {
+        flags |= O_CLOEXEC;
+    }
+    if (*mode_str) != b'r' as i8 {
+        flags |= O_CREAT;
+    }
+    if (*mode_str) == b'w' as i8 {
+        flags |= O_TRUNC;
+    }
+    if (*mode_str) != b'a' as i8 {
+        flags |= O_APPEND;
+    }
+
+    flags
+}
+
+/// Open a file with the file descriptor `fd` in the mode `mode`
+pub unsafe fn _fdopen(fd: c_int, mode: *const c_char) -> *mut FILE {
+    use string::strchr;
+    if *mode != b'r' as i8 && *mode != b'w' as i8 && *mode != b'a' as i8 {
+        platform::errno = errno::EINVAL;
+        return ptr::null_mut();
+    }
+
+    let mut flags = 0;
+    if strchr(mode, b'+' as i32).is_null() {
+        flags |= if *mode == b'r' as i8 { F_NOWR } else { F_NORD };
+    }
+
+    if !strchr(mode, b'e' as i32).is_null() {
+        sys_fcntl(fd, F_SETFD, FD_CLOEXEC);
+    }
+
+    if *mode == 'a' as i8 {
+        let f = sys_fcntl(fd, F_GETFL, 0);
+        if (f & O_APPEND) == 0 {
+            sys_fcntl(fd, F_SETFL, f | O_APPEND);
+        }
+        flags |= F_APP;
+    }
+
+    let file = calloc(mem::size_of::<FILE>() + BUFSIZ + UNGET, 1) as *mut FILE;
+    // Allocate the file
+    (*file) = FILE {
+        flags: flags,
+        rpos: ptr::null_mut(),
+        rend: ptr::null_mut(),
+        wend: ptr::null_mut(),
+        wpos: ptr::null_mut(),
+        wbase: ptr::null_mut(),
+        fd: fd,
+        buf: (file as *mut u8).add(mem::size_of::<FILE>() + UNGET),
+        buf_size: BUFSIZ,
+        buf_char: -1,
+        unget: UNGET,
+        lock: AtomicBool::new(false),
+    };
+    file
+}
+
+/// Write buffer `buf` of length `l` into `stream`
+pub fn fwritex(buf: *const u8, l: size_t, stream: &mut FILE) -> size_t {
+    use core::ptr::copy_nonoverlapping;
+    use core::slice;
+
+    let buf: &'static [u8] = unsafe { slice::from_raw_parts(buf, l) };
+    let mut l = l;
+    let mut advance = 0;
+
+    if stream.wend.is_null() && !stream.can_write() {
+        // We can't write to this stream
+        return 0;
+    }
+    if l > stream.wend as usize - stream.wpos as usize {
+        // We can't fit all of buf in the buffer
+        return stream.write(buf);
+    }
+
+    let i = if stream.buf_char >= 0 {
+        let mut i = l;
+        while i > 0 && buf[i - 1] != b'\n' {
+            i -= 1;
+        }
+        if i > 0 {
+            let n = stream.write(buf);
+            if n < i {
+                return n;
+            }
+            advance += i;
+            l -= i;
+        }
+        i
+    } else {
+        0
+    };
+
+    unsafe {
+        // Copy and reposition
+        copy_nonoverlapping(&buf[advance..] as *const _ as *const u8, stream.wpos, l);
+        stream.wpos = stream.wpos.add(l);
+    }
+    l + i
+}
+
+/// Flush `stream` without locking it.
+pub fn fflush_unlocked(stream: &mut FILE) -> c_int {
+    if stream.wpos > stream.wbase {
+        stream.write(&[]);
+        if stream.wpos.is_null() {
+            return -1;
+        }
+    }
+
+    if stream.rpos < stream.rend {
+        stream.seek(stream.rpos as i64 - stream.rend as i64, SEEK_CUR);
+    }
+
+    stream.wpos = ptr::null_mut();
+    stream.wend = ptr::null_mut();
+    stream.wbase = ptr::null_mut();
+    stream.rpos = ptr::null_mut();
+    stream.rend = ptr::null_mut();
+    0
+}
diff --git a/src/stdio/src/internal.rs b/src/stdio/src/internal.rs
new file mode 100644
index 0000000000000000000000000000000000000000..35eb5f47e8896126ae57e64a41d383842659d189
--- /dev/null
+++ b/src/stdio/src/internal.rs
@@ -0,0 +1,19 @@
+use super::{constants, FILE};
+use platform;
+use platform::types::*;
+use core::{mem, ptr, slice};
+
+pub fn ftello(stream: &mut FILE) -> off_t {
+    let pos = stream.seek(
+        0,
+        if (stream.flags & constants::F_APP > 0) && stream.wpos > stream.wbase {
+            constants::SEEK_END
+        } else {
+            constants::SEEK_CUR
+        },
+    );
+    if pos < 0 {
+        return pos;
+    }
+    pos - (stream.rend as i64 - stream.rpos as i64) + (stream.wpos as i64 - stream.wbase as i64)
+}
diff --git a/src/stdio/src/lib.rs b/src/stdio/src/lib.rs
index e99351639b22ed0de4e5c8d09eacbb288d8bea53..98e3a3913f180b08bf6671e1c095d133f7c8b7d3 100644
--- a/src/stdio/src/lib.rs
+++ b/src/stdio/src/lib.rs
@@ -1,41 +1,186 @@
 //! stdio implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/stdio.h.html
 
+#![feature(compiler_builtins_lib)]
 #![no_std]
 
+extern crate compiler_builtins;
 extern crate errno;
+extern crate fcntl;
 extern crate platform;
+extern crate stdlib;
+extern crate string;
 extern crate va_list as vl;
 
 use core::str;
-use core::fmt::Write;
+use core::ptr;
+use core::fmt::{Error, Result, Write};
+use core::sync::atomic::{AtomicBool, Ordering};
 
 use platform::types::*;
-use platform::c_str;
-use platform::errno;
+use platform::{c_str, errno};
 use errno::STR_ERROR;
 use vl::VaList as va_list;
 
 mod printf;
 
-pub const BUFSIZ: c_int = 4096;
-
-pub const FILENAME_MAX: c_int = 4096;
-
-pub type fpos_t = off_t;
-
-pub struct FILE;
-
-#[allow(non_upper_case_globals)]
-#[no_mangle]
-pub static mut stdout: *mut FILE = 1 as *mut FILE;
-
-#[allow(non_upper_case_globals)]
-#[no_mangle]
-pub static mut stderr: *mut FILE = 2 as *mut FILE;
+mod default;
+pub use default::*;
+
+mod constants;
+pub use constants::*;
+
+mod helpers;
+
+mod internal;
+
+#[repr(C)]
+pub struct FILE {
+    flags: c_int,
+    rpos: *mut u8,
+    rend: *mut u8,
+    wend: *mut u8,
+    wpos: *mut u8,
+    wbase: *mut u8,
+    fd: c_int,
+    buf: *mut u8,
+    buf_size: size_t,
+    buf_char: i8,
+    lock: AtomicBool,
+    unget: size_t,
+}
+
+impl FILE {
+    pub fn can_read(&mut self) -> bool {
+        if self.flags & constants::F_BADJ > 0 {
+            // Static and needs unget region
+            self.buf = unsafe { self.buf.add(self.unget) };
+            self.flags &= !constants::F_BADJ;
+        }
+
+        if self.wpos > self.wbase {
+            self.write(&[]);
+        }
+        self.wpos = ptr::null_mut();
+        self.wbase = ptr::null_mut();
+        self.wend = ptr::null_mut();
+        if self.flags & constants::F_NORD > 0 {
+            self.flags |= constants::F_ERR;
+            return false;
+        }
+        self.rpos = unsafe { self.buf.offset(self.buf_size as isize - 1) };
+        self.rend = unsafe { self.buf.offset(self.buf_size as isize - 1) };
+        if self.flags & constants::F_EOF > 0 {
+            false
+        } else {
+            true
+        }
+    }
+    pub fn can_write(&mut self) -> bool {
+        if self.flags & constants::F_BADJ > 0 {
+            // Static and needs unget region
+            self.buf = unsafe { self.buf.add(self.unget) };
+            self.flags &= !constants::F_BADJ;
+        }
+
+        if self.flags & constants::F_NOWR > 0 {
+            self.flags &= constants::F_ERR;
+            return false;
+        }
+        // Buffer repositioning
+        self.rpos = ptr::null_mut();
+        self.rend = ptr::null_mut();
+        self.wpos = self.buf;
+        self.wbase = self.buf;
+        self.wend = unsafe { self.buf.offset(self.buf_size as isize - 1) };
+        return true;
+    }
+    pub fn write(&mut self, to_write: &[u8]) -> usize {
+        use core::slice;
+        use core::mem;
+        let len = self.wpos as usize - self.wbase as usize;
+        let mut advance = 0;
+        let mut f_buf: &'static _ = unsafe { slice::from_raw_parts(self.wbase, len) };
+        let mut f_filled = false;
+        let mut rem = f_buf.len() + to_write.len();
+        loop {
+            let mut count = if f_filled {
+                platform::write(self.fd, &f_buf[advance..])
+            } else {
+                platform::write(self.fd, &f_buf[advance..]) + platform::write(self.fd, to_write)
+            };
+            if count == rem as isize {
+                self.wend = unsafe { self.buf.add(self.buf_size - 1) };
+                self.wpos = self.buf;
+                self.wbase = self.buf;
+                return to_write.len();
+            }
+            if count < 0 {
+                self.wpos = ptr::null_mut();
+                self.wbase = ptr::null_mut();
+                self.wend = ptr::null_mut();
+                self.flags |= constants::F_ERR;
+                return 0;
+            }
+            rem -= count as usize;
+            if count as usize > len {
+                count -= len as isize;
+                f_buf = unsafe { mem::transmute(to_write) };
+                f_filled = true;
+                advance = 0;
+            }
+            advance += count as usize;
+        }
+    }
+    pub fn read(&mut self, buf: &mut [u8]) -> usize {
+        use core::slice;
+        // let buff = slice::from_raw_parts_mut(buf, size - !((*stream).buf_size == 0) as usize);
+        let adj = !(self.buf_size == 0) as usize;
+        let mut file_buf: &'static mut _ =
+            unsafe { slice::from_raw_parts_mut(self.buf, self.buf_size) };
+        let count = if buf.len() <= 1 + adj {
+            platform::read(self.fd, file_buf)
+        } else {
+            platform::read(self.fd, buf) + platform::read(self.fd, file_buf)
+        };
+        if count <= 0 {
+            self.flags |= if count == 0 {
+                constants::F_EOF
+            } else {
+                constants::F_ERR
+            };
+            return 0;
+        }
+        if count as usize <= buf.len() - adj {
+            return count as usize;
+        }
+        unsafe {
+            // Adjust pointers
+            self.rpos = self.buf;
+            self.rend = self.buf.offset(count);
+            buf[buf.len() - 1] = *self.rpos;
+            self.rpos = self.rpos.add(1);
+        }
+        buf.len()
+    }
+    pub fn seek(&self, off: off_t, whence: c_int) -> off_t {
+        unsafe { platform::lseek(self.fd, off, whence) }
+    }
+}
+impl Write for FILE {
+    fn write_str(&mut self, s: &str) -> Result {
+        let s = s.as_bytes();
+        if self.write(s) != s.len() {
+            Err(Error)
+        } else {
+            Ok(())
+        }
+    }
+}
 
+/// Clears EOF and ERR indicators on a stream
 #[no_mangle]
-pub extern "C" fn clearerr(stream: *mut FILE) {
-    unimplemented!();
+pub extern "C" fn clearerr(stream: &mut FILE) {
+    stream.flags &= !(F_EOF | F_ERR);
 }
 
 #[no_mangle]
@@ -48,176 +193,468 @@ pub extern "C" fn cuserid(s: *mut c_char) -> *mut c_char {
     unimplemented!();
 }
 
+/// Close a file
+/// This function does not guarentee that the file buffer will be flushed or that the file
+/// descriptor will be closed, so if it is important that the file be written to, use `fflush()`
+/// prior to using this function.
 #[no_mangle]
-pub extern "C" fn fclose(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn fclose(stream: &mut FILE) -> c_int {
+    use stdlib::free;
+    flockfile(stream);
+    let r = helpers::fflush_unlocked(stream) | platform::close(stream.fd);
+    if stream.flags & constants::F_PERM == 0 {
+        // Not one of stdin, stdout or stderr
+        unsafe {
+            free(stream as *mut _ as *mut _);
+        }
+    }
+    r
 }
 
+/// Open a file from a file descriptor
 #[no_mangle]
 pub extern "C" fn fdopen(fildes: c_int, mode: *const c_char) -> *mut FILE {
-    unimplemented!();
+    unsafe { helpers::_fdopen(fildes, mode) }
 }
 
+/// Check for EOF
 #[no_mangle]
-pub extern "C" fn feof(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn feof(stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    let ret = stream.flags & F_EOF;
+    funlockfile(stream);
+    ret
 }
 
+/// Check for ERR
 #[no_mangle]
-pub extern "C" fn ferror(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn ferror(stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    let ret = stream.flags & F_ERR;
+    funlockfile(stream);
+    ret
 }
 
+/// Flush output to stream, or sync read position
+/// Ensure the file is unlocked before calling this function, as it will attempt to lock the file
+/// itself.
 #[no_mangle]
-pub extern "C" fn fflush(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn fflush(stream: &mut FILE) -> c_int {
+    flockfile(stream);
+
+    let ret = helpers::fflush_unlocked(stream);
+
+    funlockfile(stream);
+    ret
 }
 
+/// Get a single char from a stream
 #[no_mangle]
-pub extern "C" fn fgetc(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn fgetc(stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    let c = getc_unlocked(stream);
+    funlockfile(stream);
+    c
 }
 
+/// Get the position of the stream and store it in pos
 #[no_mangle]
-pub extern "C" fn fgetpos(stream: *mut FILE, pos: *mut fpos_t) -> c_int {
-    unimplemented!();
+pub extern "C" fn fgetpos(stream: &mut FILE, pos: *mut fpos_t) -> c_int {
+    let off = internal::ftello(stream);
+    if off < 0 {
+        return -1;
+    }
+    unsafe {
+        (*pos) = off;
+    }
+    0
 }
 
+/// Get a string from the stream
 #[no_mangle]
-pub extern "C" fn fgets(s: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char {
-    unimplemented!();
+pub extern "C" fn fgets(s: *mut c_char, n: c_int, stream: &mut FILE) -> *mut c_char {
+    use string::memchr;
+    use core::ptr::copy_nonoverlapping;
+
+    flockfile(stream);
+    let mut ptr = s as *mut u8;
+    let mut n = n;
+
+    if n <= 1 {
+        funlockfile(stream);
+        if n == 0 {
+            return ptr::null_mut();
+        }
+        unsafe {
+            (*s) = b'\0' as i8;
+        }
+        return s;
+    }
+    while n > 0 {
+        let z = unsafe {
+            memchr(
+                stream.rpos as *const c_void,
+                b'\n' as c_int,
+                stream.rend as usize - stream.rpos as usize,
+            ) as *mut u8
+        };
+        let k = if z.is_null() {
+            stream.rend as usize - stream.rpos as usize
+        } else {
+            z as usize - stream.rpos as usize + 1
+        };
+        let k = if k as i32 > n { n as usize } else { k };
+        unsafe {
+            // Copy
+            copy_nonoverlapping(stream.rpos, ptr, k);
+            // Reposition pointers
+            stream.rpos = stream.rpos.add(k);
+            ptr = ptr.add(k);
+        }
+        n -= k as i32;
+        if !z.is_null() || n < 1 {
+            break;
+        }
+        let c = getc_unlocked(stream);
+        if c < 0 {
+            break;
+        }
+        n -= 1;
+
+        unsafe {
+            // Pointer stuff
+            *ptr = c as u8;
+            ptr = ptr.add(1);
+        }
+
+        if c as u8 == b'\n' {
+            break;
+        }
+    }
+    if !s.is_null() {
+        unsafe {
+            *ptr = 0;
+        }
+    }
+    funlockfile(stream);
+    s
 }
 
+/// Get the underlying file descriptor
 #[no_mangle]
-pub extern "C" fn fileno(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn fileno(stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    funlockfile(stream);
+    stream.fd
 }
 
+/// Lock the file
+/// Do not call any functions other than those with the `_unlocked` postfix while the file is
+/// locked
 #[no_mangle]
-pub extern "C" fn flockfile(file: *mut FILE) {
-    unimplemented!();
+pub extern "C" fn flockfile(file: &mut FILE) {
+    while ftrylockfile(file) != 0 {}
 }
 
+/// Open the file in mode `mode`
 #[no_mangle]
-pub extern "C" fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE {
-    unimplemented!();
+pub unsafe extern "C" fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE {
+    use core::ptr;
+    let initial_mode = *mode;
+    if initial_mode != b'r' as i8 && initial_mode != b'w' as i8 && initial_mode != b'a' as i8 {
+        platform::errno = errno::EINVAL;
+        return ptr::null_mut();
+    }
+
+    let flags = helpers::parse_mode_flags(mode);
+
+    let fd = fcntl::sys_open(filename, flags, 0o666);
+    if fd < 0 {
+        return ptr::null_mut();
+    }
+
+    if flags & fcntl::O_CLOEXEC > 0 {
+        fcntl::sys_fcntl(fd, fcntl::F_SETFD, fcntl::FD_CLOEXEC);
+    }
+
+    let f = helpers::_fdopen(fd, mode);
+    if f.is_null() {
+        platform::close(fd);
+        return ptr::null_mut();
+    }
+    f
 }
 
+/// Insert a character into the stream
 #[no_mangle]
-pub extern "C" fn fputc(c: c_int, stream: *mut FILE) -> c_int {
-    platform::FileWriter(stream as c_int)
-        .write_char(c as u8 as char)
-        .map_err(|_| return -1);
+pub extern "C" fn fputc(c: c_int, stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    let c = putc_unlocked(c, stream);
+    funlockfile(stream);
     c
 }
 
+/// Insert a string into a stream
 #[no_mangle]
-pub unsafe extern "C" fn fputs(s: *const c_char, stream: *mut FILE) -> c_int {
+pub extern "C" fn fputs(s: *const c_char, stream: &mut FILE) -> c_int {
     extern "C" {
         fn strlen(s: *const c_char) -> size_t;
     }
-    use core::{slice, str};
-    let len = strlen(s);
-    platform::FileWriter(stream as c_int)
-        .write_str(str::from_utf8_unchecked(slice::from_raw_parts(
-            s as *const u8,
-            len,
-        )))
-        .map_err(|_| return -1);
-    len as i32
-}
+    let len = unsafe { strlen(s) };
+    (fwrite(s as *const c_void, 1, len, stream) == len) as c_int - 1
+}
+
+/// Read `nitems` of size `size` into `ptr` from `stream`
+#[no_mangle]
+pub extern "C" fn fread(ptr: *mut c_void, size: usize, nitems: usize, stream: &mut FILE) -> usize {
+    use core::ptr::copy_nonoverlapping;
+    use core::slice;
+    let mut dest = ptr as *mut u8;
+    let len = size * nitems;
+    let mut l = len as isize;
+
+    flockfile(stream);
+
+    if stream.rend > stream.rpos {
+        // We have some buffered data that can be read
+        let diff = stream.rend as usize - stream.rpos as usize;
+        let k = if diff < l as usize { diff } else { l as usize };
+        unsafe {
+            // Copy data
+            copy_nonoverlapping(stream.rpos, dest, k);
+            // Reposition pointers
+            stream.rpos = stream.rpos.add(k);
+            dest = dest.add(k);
+        }
+        l -= k as isize;
+    }
 
-#[no_mangle]
-pub extern "C" fn fread(ptr: *mut c_void, size: usize, nitems: usize, stream: *mut FILE) -> usize {
-    unimplemented!();
+    while l > 0 {
+        let k = if !stream.can_read() {
+            0
+        } else {
+            stream.read(unsafe { slice::from_raw_parts_mut(dest, l as usize) })
+        };
+
+        if k == 0 {
+            funlockfile(stream);
+            return (len - l as usize) / 2;
+        }
+
+        l -= k as isize;
+        unsafe {
+            // Reposition
+            dest = dest.add(k);
+        }
+    }
+
+    funlockfile(stream);
+    nitems
 }
 
 #[no_mangle]
 pub extern "C" fn freopen(
     filename: *const c_char,
     mode: *const c_char,
-    stream: *mut FILE,
+    stream: &mut FILE,
 ) -> *mut FILE {
-    unimplemented!();
+    let mut flags = unsafe { helpers::parse_mode_flags(mode) };
+    flockfile(stream);
+
+    helpers::fflush_unlocked(stream);
+    if filename.is_null() {
+        // Reopen stream in new mode
+        if flags & fcntl::O_CLOEXEC > 0 {
+            fcntl::sys_fcntl(stream.fd, fcntl::F_SETFD, fcntl::FD_CLOEXEC);
+        }
+        flags &= !(fcntl::O_CREAT | fcntl::O_EXCL | fcntl::O_CLOEXEC);
+        if fcntl::sys_fcntl(stream.fd, fcntl::F_SETFL, flags) < 0 {
+            funlockfile(stream);
+            fclose(stream);
+            return ptr::null_mut();
+        }
+    } else {
+        let new = unsafe { fopen(filename, mode) };
+        if new.is_null() {
+            funlockfile(stream);
+            fclose(stream);
+            return ptr::null_mut();
+        }
+        let new = unsafe { &mut *new }; // Should be safe, new is not null
+        if new.fd == stream.fd {
+            new.fd = -1;
+        } else if platform::dup2(new.fd, stream.fd) < 0
+            || fcntl::sys_fcntl(stream.fd, fcntl::F_SETFL, flags & fcntl::O_CLOEXEC) < 0
+        {
+            fclose(new);
+            funlockfile(stream);
+            fclose(stream);
+            return ptr::null_mut();
+        }
+        stream.flags = (stream.flags & constants::F_PERM) | new.flags;
+        fclose(new);
+    }
+    funlockfile(stream);
+    stream
 }
 
+/// Seek to an offset `offset` from `whence`
 #[no_mangle]
-pub extern "C" fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int {
-    unimplemented!();
+pub extern "C" fn fseek(stream: &mut FILE, offset: c_long, whence: c_int) -> c_int {
+    if fseeko(stream, offset as off_t, whence) != -1 {
+        return 0;
+    }
+    -1
 }
 
+/// Seek to an offset `offset` from `whence`
 #[no_mangle]
-pub extern "C" fn fseeko(stream: *mut FILE, offset: off_t, whence: c_int) -> c_int {
-    unimplemented!();
+pub extern "C" fn fseeko(stream: &mut FILE, offset: off_t, whence: c_int) -> c_int {
+    let mut off = offset;
+    flockfile(stream);
+    // Adjust for what is currently in the buffer
+    if whence == SEEK_CUR {
+        off -= (stream.rend as usize - stream.rpos as usize) as i64;
+    }
+    if stream.wpos > stream.wbase {
+        stream.write(&[]);
+        if stream.wpos.is_null() {
+            return -1;
+        }
+    }
+    stream.wpos = ptr::null_mut();
+    stream.wend = ptr::null_mut();
+    stream.wbase = ptr::null_mut();
+    if stream.seek(off, whence) < 0 {
+        return -1;
+    }
+    stream.rpos = ptr::null_mut();
+    stream.rend = ptr::null_mut();
+    stream.flags &= !F_EOF;
+    funlockfile(stream);
+    0
 }
 
+/// Seek to a position `pos` in the file from the beginning of the file
 #[no_mangle]
-pub extern "C" fn fsetpos(stream: *mut FILE, pos: *const fpos_t) -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn fsetpos(stream: &mut FILE, pos: *const fpos_t) -> c_int {
+    fseek(stream, *pos as off_t, SEEK_SET)
 }
 
+/// Get the current position of the cursor in the file
 #[no_mangle]
-pub extern "C" fn ftell(stream: *mut FILE) -> c_long {
-    unimplemented!();
+pub unsafe extern "C" fn ftell(stream: &mut FILE) -> c_long {
+    ftello(stream) as c_long
 }
 
+/// Get the current position of the cursor in the file
 #[no_mangle]
-pub extern "C" fn ftello(stream: *mut FILE) -> off_t {
-    unimplemented!();
+pub extern "C" fn ftello(stream: &mut FILE) -> off_t {
+    flockfile(stream);
+    let pos = internal::ftello(stream);
+    funlockfile(stream);
+    pos
 }
 
+/// Try to lock the file. Returns 0 for success, 1 for failure
 #[no_mangle]
-pub extern "C" fn ftrylockfile(file: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn ftrylockfile(file: &mut FILE) -> c_int {
+    file.lock.compare_and_swap(false, true, Ordering::Acquire) as c_int
 }
 
+/// Unlock the file
 #[no_mangle]
-pub extern "C" fn funlockfile(file: *mut FILE) {
-    unimplemented!();
+pub extern "C" fn funlockfile(file: &mut FILE) {
+    file.lock.store(false, Ordering::Release);
 }
 
+/// Write `nitems` of size `size` from `ptr` to `stream`
 #[no_mangle]
 pub extern "C" fn fwrite(
     ptr: *const c_void,
     size: usize,
     nitems: usize,
-    stream: *mut FILE,
+    stream: &mut FILE,
 ) -> usize {
-    unimplemented!();
+    let l = size * nitems;
+    let nitems = if size == 0 { 0 } else { nitems };
+    flockfile(stream);
+    let k = helpers::fwritex(ptr as *const u8, l, stream);
+    funlockfile(stream);
+    if k == l {
+        nitems
+    } else {
+        k / size
+    }
 }
 
+/// Get a single char from a stream
 #[no_mangle]
-pub extern "C" fn getc(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn getc(stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    let c = getc_unlocked(stream);
+    funlockfile(stream);
+    c
 }
 
+/// Get a single char from `stdin`
 #[no_mangle]
-pub extern "C" fn getchar() -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn getchar() -> c_int {
+    fgetc(&mut *stdin)
 }
 
+/// Get a char from a stream without locking the stream
 #[no_mangle]
-pub extern "C" fn getc_unlocked(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn getc_unlocked(stream: &mut FILE) -> c_int {
+    if stream.rpos < stream.rend {
+        unsafe {
+            let ret = *stream.rpos as c_int;
+            stream.rpos = stream.rpos.add(1);
+            ret
+        }
+    } else {
+        let mut c = [0u8; 1];
+        if stream.can_read() && stream.read(&mut c) == 1 {
+            c[0] as c_int
+        } else {
+            -1
+        }
+    }
 }
 
+/// Get a char from `stdin` without locking `stdin`
 #[no_mangle]
-pub extern "C" fn getchar_unlocked() -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn getchar_unlocked() -> c_int {
+    getc_unlocked(&mut *stdin)
 }
 
+/// Get a string from `stdin`
 #[no_mangle]
-pub extern "C" fn gets(s: *mut c_char) -> *mut c_char {
-    unimplemented!();
+pub unsafe extern "C" fn gets(s: *mut c_char) -> *mut c_char {
+    use core::i32;
+    fgets(s, i32::MAX, &mut *stdin)
 }
 
+/// Get an integer from `stream`
 #[no_mangle]
-pub extern "C" fn getw(stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn getw(stream: &mut FILE) -> c_int {
+    use core::mem;
+    let mut ret: c_int = 0;
+    if fread(
+        &mut ret as *mut c_int as *mut c_void,
+        mem::size_of_val(&ret),
+        1,
+        stream,
+    ) > 0
+    {
+        ret
+    } else {
+        -1
+    }
 }
 
 #[no_mangle]
-pub extern "C" fn pclose(stream: *mut FILE) -> c_int {
+pub extern "C" fn pclose(stream: &mut FILE) -> c_int {
     unimplemented!();
 }
 
@@ -238,60 +675,135 @@ pub extern "C" fn popen(command: *const c_char, mode: *const c_char) -> *mut FIL
     unimplemented!();
 }
 
+/// Put a character `c` into `stream`
 #[no_mangle]
-pub extern "C" fn putc(c: c_int, stream: *mut FILE) -> c_int {
-    fputc(c, stream)
+pub extern "C" fn putc(c: c_int, stream: &mut FILE) -> c_int {
+    flockfile(stream);
+    let ret = putc_unlocked(c, stream);
+    funlockfile(stream);
+    ret
 }
 
+/// Put a character `c` into `stdout`
 #[no_mangle]
 pub unsafe extern "C" fn putchar(c: c_int) -> c_int {
-    putc(c, stdout)
+    fputc(c, &mut *stdout)
 }
 
+/// Put a character `c` into `stream` without locking `stream`
 #[no_mangle]
-pub extern "C" fn putc_unlocked(c: c_int, stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn putc_unlocked(c: c_int, stream: &mut FILE) -> c_int {
+    if c as i8 != stream.buf_char && stream.wpos < stream.wend {
+        unsafe {
+            *stream.wpos = c as u8;
+            stream.wpos = stream.wpos.add(1);
+            c
+        }
+    } else {
+        if stream.wend.is_null() && stream.can_write() {
+            -1
+        } else if c as i8 != stream.buf_char && stream.wpos < stream.wend {
+            unsafe {
+                *stream.wpos = c as u8;
+                stream.wpos = stream.wpos.add(1);
+                c
+            }
+        } else if stream.write(&[c as u8]) != 1 {
+            -1
+        } else {
+            c
+        }
+    }
 }
 
+/// Put a character `c` into `stdout` without locking `stdout`
 #[no_mangle]
 pub unsafe extern "C" fn putchar_unlocked(c: c_int) -> c_int {
-    putc_unlocked(c, stdout)
+    putc_unlocked(c, &mut *stdout)
 }
 
+/// Put a string `s` into `stdout`
 #[no_mangle]
 pub unsafe extern "C" fn puts(s: *const c_char) -> c_int {
-    fputs(s, stdout);
-    putchar(b'\n' as c_int)
+    let ret = (fputs(s, &mut *stdout) > 0) || (putchar_unlocked(b'\n' as c_int) > 0);
+    if ret {
+        0
+    } else {
+        -1
+    }
 }
 
+/// Put an integer `w` into `stream`
 #[no_mangle]
-pub extern "C" fn putw(w: c_int, stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn putw(w: c_int, stream: &mut FILE) -> c_int {
+    use core::mem;
+    fwrite(&w as *const i32 as _, mem::size_of_val(&w), 1, stream) as i32 - 1
 }
 
+/// Delete file or directory `path`
 #[no_mangle]
 pub extern "C" fn remove(path: *const c_char) -> c_int {
-    unimplemented!();
+    let r = platform::unlink(path);
+    if r == -errno::EISDIR {
+        platform::rmdir(path)
+    } else {
+        r
+    }
 }
 
 #[no_mangle]
 pub extern "C" fn rename(old: *const c_char, new: *const c_char) -> c_int {
+    // This function requires a rename syscall, which currently is not in platform.
     unimplemented!();
 }
 
+/// Rewind `stream` back to the beginning of it
 #[no_mangle]
-pub extern "C" fn rewind(stream: *mut FILE) {
-    unimplemented!();
+pub extern "C" fn rewind(stream: &mut FILE) {
+    fseeko(stream, 0, SEEK_SET);
+    flockfile(stream);
+    stream.flags &= !F_ERR;
+    funlockfile(stream);
 }
 
+/// Reset `stream` to use buffer `buf`. Buffer must be `BUFSIZ` in length
 #[no_mangle]
-pub extern "C" fn setbuf(stream: *mut FILE, buf: *mut c_char) {
-    unimplemented!();
+pub extern "C" fn setbuf(stream: &mut FILE, buf: *mut c_char) {
+    unsafe {
+        setvbuf(
+            stream,
+            buf,
+            if buf.is_null() { _IONBF } else { _IOFBF },
+            BUFSIZ as usize,
+        )
+    };
 }
 
+/// Reset `stream` to use buffer `buf` of size `size`
+/// If this isn't the meaning of unsafe, idk what is
 #[no_mangle]
-pub extern "C" fn setvbuf(stream: *mut FILE, buf: *mut c_char, mode: c_int, size: usize) -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn setvbuf(
+    stream: &mut FILE,
+    buf: *mut c_char,
+    mode: c_int,
+    size: usize,
+) -> c_int {
+    // TODO: Check correctness
+    use stdlib::calloc;
+    let mut buf = buf;
+    if buf.is_null() && mode != _IONBF {
+        buf = calloc(size, 1) as *mut c_char;
+    }
+    (*stream).buf_size = size;
+    (*stream).buf_char = -1;
+    if mode == _IONBF {
+        (*stream).buf_size = 0;
+    } else if mode == _IOLBF {
+        (*stream).buf_char = b'\n' as i8;
+    }
+    (*stream).flags |= F_SVB;
+    (*stream).buf = buf as *mut u8;
+    0
 }
 
 #[no_mangle]
@@ -309,19 +821,40 @@ pub extern "C" fn tmpnam(s: *mut c_char) -> *mut c_char {
     unimplemented!();
 }
 
+/// Push character `c` back onto `stream` so it'll be read next
 #[no_mangle]
-pub extern "C" fn ungetc(c: c_int, stream: *mut FILE) -> c_int {
-    unimplemented!();
+pub extern "C" fn ungetc(c: c_int, stream: &mut FILE) -> c_int {
+    if c < 0 {
+        c
+    } else {
+        flockfile(stream);
+        if stream.rpos.is_null() {
+            stream.can_read();
+        }
+        if stream.rpos.is_null() || stream.rpos <= unsafe { stream.buf.sub(stream.unget) } {
+            funlockfile(stream);
+            return -1;
+        }
+
+        unsafe {
+            stream.rpos = stream.rpos.sub(1);
+            *stream.rpos = c as u8;
+        }
+        stream.flags &= !F_EOF;
+
+        funlockfile(stream);
+        c
+    }
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn vfprintf(file: *mut FILE, format: *const c_char, ap: va_list) -> c_int {
-    printf::printf(platform::FileWriter(file as c_int), format, ap)
+pub unsafe extern "C" fn vfprintf(file: &mut FILE, format: *const c_char, ap: va_list) -> c_int {
+    printf::printf(file, format, ap)
 }
 
 #[no_mangle]
 pub unsafe extern "C" fn vprintf(format: *const c_char, ap: va_list) -> c_int {
-    vfprintf(stdout, format, ap)
+    vfprintf(&mut *stdout, format, ap)
 }
 
 #[no_mangle]
@@ -331,12 +864,16 @@ pub unsafe extern "C" fn vsnprintf(
     format: *const c_char,
     ap: va_list,
 ) -> c_int {
-    printf::printf(platform::StringWriter(s as *mut u8, n as usize), format, ap)
+    printf::printf(
+        &mut platform::StringWriter(s as *mut u8, n as usize),
+        format,
+        ap,
+    )
 }
 
 #[no_mangle]
 pub unsafe extern "C" fn vsprintf(s: *mut c_char, format: *const c_char, ap: va_list) -> c_int {
-    printf::printf(platform::UnsafeStringWriter(s as *mut u8), format, ap)
+    printf::printf(&mut platform::UnsafeStringWriter(s as *mut u8), format, ap)
 }
 
 /*
diff --git a/src/stdio/src/printf.rs b/src/stdio/src/printf.rs
index 093ee82c122d6f902e00d8f9c05f2653dcdbc432..fee1c1156d60af5d615a08f828dbf22253af1c63 100644
--- a/src/stdio/src/printf.rs
+++ b/src/stdio/src/printf.rs
@@ -1,4 +1,4 @@
-use core::{fmt, mem, slice, str};
+use core::{fmt, slice, str};
 
 use platform::types::*;
 use vl::VaList;
diff --git a/src/stdlib/Cargo.toml b/src/stdlib/Cargo.toml
index 97f5d44187b6fc477f3bb8ece793d9fd6d56fddd..cc96a5dc070fbb56e8961f4b62c2a339c27a3d88 100644
--- a/src/stdlib/Cargo.toml
+++ b/src/stdlib/Cargo.toml
@@ -12,3 +12,4 @@ platform = { path = "../platform" }
 ralloc = { path = "../../ralloc", default-features = false }
 ctype = { path = "../ctype" }
 errno = { path = "../errno" }
+rand = { git = "https://github.com/rust-lang-nursery/rand/", default-features = false }
diff --git a/src/stdlib/src/lib.rs b/src/stdlib/src/lib.rs
index 575f759a264f4eb6624c2577be08145114bbac14..9c948d6779a381db7afdb911fa20aad476e1f982 100644
--- a/src/stdlib/src/lib.rs
+++ b/src/stdlib/src/lib.rs
@@ -8,8 +8,10 @@ extern crate ctype;
 extern crate errno;
 extern crate platform;
 extern crate ralloc;
+extern crate rand;
 
 use core::{ptr, str};
+use rand::{Rng, SeedableRng, XorShiftRng};
 
 use errno::*;
 use platform::types::*;
@@ -19,8 +21,10 @@ static ALLOCATOR: ralloc::Allocator = ralloc::Allocator;
 
 pub const EXIT_FAILURE: c_int = 1;
 pub const EXIT_SUCCESS: c_int = 0;
+pub const RAND_MAX: c_int = 2147483647;
 
 static mut ATEXIT_FUNCS: [Option<extern "C" fn()>; 32] = [None; 32];
+static mut RNG: Option<XorShiftRng> = None;
 
 #[no_mangle]
 pub unsafe extern "C" fn a64l(s: *const c_char) -> c_long {
@@ -375,8 +379,16 @@ pub extern "C" fn qsort(
 }
 
 #[no_mangle]
-pub extern "C" fn rand() -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn rand() -> c_int {
+    match RNG {
+        Some(ref mut rng) => rng.gen_range::<c_int>(0, RAND_MAX),
+        None => {
+            let mut rng = XorShiftRng::from_seed([1; 16]);
+            let ret = rng.gen_range::<c_int>(0, RAND_MAX);
+            RNG = Some(rng);
+            ret
+        }
+    }
 }
 
 #[no_mangle]
@@ -425,8 +437,8 @@ pub extern "C" fn setstate(state: *const c_char) -> *mut c_char {
 }
 
 #[no_mangle]
-pub extern "C" fn srand(seed: c_uint) {
-    unimplemented!();
+pub unsafe extern "C" fn srand(seed: c_uint) {
+    RNG = Some(XorShiftRng::from_seed([seed as u8; 16]));
 }
 
 #[no_mangle]
diff --git a/src/time/cbindgen.toml b/src/time/cbindgen.toml
index ef3a5240e6d6dd30ae2b1b7421ecc5f4783a7f8f..40448b8f899a567c7c044c9f5705a89d65e7a8e8 100644
--- a/src/time/cbindgen.toml
+++ b/src/time/cbindgen.toml
@@ -4,3 +4,7 @@ language = "C"
 
 [enum]
 prefix_with_name = true
+
+[defines]
+"target_os = linux" = "__linux__"
+"target_os = redox" = "__redox__"
diff --git a/src/time/src/lib.rs b/src/time/src/lib.rs
index 5b90e86f7482758341965c01524964cb4af57da7..5835d7014b7e01ae01e4ab067b27eff14a060c97 100644
--- a/src/time/src/lib.rs
+++ b/src/time/src/lib.rs
@@ -6,6 +6,33 @@ extern crate platform;
 
 use platform::types::*;
 
+#[cfg(target_os = "redox")]
+pub const CLOCK_REALTIME: c_int = 1;
+#[cfg(target_os = "redox")]
+pub const CLOCK_MONOTONIC: c_int = 4;
+#[cfg(target_os = "linux")]
+pub const CLOCK_REALTIME: c_int = 0;
+#[cfg(target_os = "linux")]
+pub const CLOCK_MONOTONIC: c_int = 1;
+#[cfg(target_os = "linux")]
+pub const CLOCK_PROCESS_CPUTIME_ID: c_int = 2;
+#[cfg(target_os = "linux")]
+pub const CLOCK_THREAD_CPUTIME_ID: c_int = 3;
+#[cfg(target_os = "linux")]
+pub const CLOCK_MONOTONIC_RAW: c_int = 4;
+#[cfg(target_os = "linux")]
+pub const CLOCK_REALTIME_COARSE: c_int = 5;
+#[cfg(target_os = "linux")]
+pub const CLOCK_MONOTONIC_COARSE: c_int = 6;
+#[cfg(target_os = "linux")]
+pub const CLOCK_BOOTTIME: c_int = 7;
+#[cfg(target_os = "linux")]
+pub const CLOCK_REALTIME_ALARM: c_int = 8;
+#[cfg(target_os = "linux")]
+pub const CLOCK_BOOTTIME_ALARM: c_int = 9;
+#[cfg(target_os = "linux")]
+pub const CLOCK_TAI: c_int = 11;
+
 /*
  *#[repr(C)]
  *pub struct timespec {
@@ -59,7 +86,7 @@ pub extern "C" fn clock_getres(clock_id: clockid_t, res: *mut timespec) -> c_int
 
 #[no_mangle]
 pub extern "C" fn clock_gettime(clock_id: clockid_t, tp: *mut timespec) -> c_int {
-    unimplemented!();
+    platform::clock_gettime(clock_id, tp)
 }
 
 #[no_mangle]
@@ -134,7 +161,14 @@ pub extern "C" fn strptime(buf: *const c_char, format: *const c_char, tm: *mut t
 
 #[no_mangle]
 pub extern "C" fn time(tloc: *mut time_t) -> time_t {
-    unimplemented!();
+    let mut ts: timespec = Default::default();
+    platform::clock_gettime(CLOCK_REALTIME, &mut ts);
+    unsafe {
+        if !tloc.is_null() {
+            *tloc = ts.tv_sec
+        };
+    }
+    ts.tv_sec
 }
 
 #[no_mangle]
diff --git a/src/unistd/Cargo.toml b/src/unistd/Cargo.toml
index 3edd54a814220a16f00bbbe9093cbb4eb21ade0d..8de8a2b933f7dcab4ba2b819b12b6288c34666b3 100644
--- a/src/unistd/Cargo.toml
+++ b/src/unistd/Cargo.toml
@@ -9,3 +9,5 @@ cbindgen = { path = "../../cbindgen" }
 
 [dependencies]
 platform = { path = "../platform" }
+stdio = { path = "../stdio" }
+string = { path = "../string" }
diff --git a/src/unistd/src/getopt.rs b/src/unistd/src/getopt.rs
new file mode 100644
index 0000000000000000000000000000000000000000..c93a5487b94d3be9ca9e0522811ab028a6b316fb
--- /dev/null
+++ b/src/unistd/src/getopt.rs
@@ -0,0 +1,149 @@
+//! getopt implementation for Redox, following http://pubs.opengroup.org/onlinepubs/009695399/functions/getopt.html
+
+use super::platform::types::*;
+use super::platform;
+use super::stdio;
+use super::string;
+use core::ptr;
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut optarg: *mut c_char = ptr::null_mut();
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut optind: c_int = 1;
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut opterr: c_int = 1;
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+pub static mut optopt: c_int = -1;
+
+static mut CURRENT_OPT: *mut c_char = ptr::null_mut();
+
+#[no_mangle]
+pub unsafe extern "C" fn getopt(
+    argc: c_int,
+    argv: *const *mut c_char,
+    optstring: *const c_char,
+) -> c_int {
+    if CURRENT_OPT.is_null() || *CURRENT_OPT == 0 {
+        if optind >= argc {
+            -1
+        } else {
+            let current_arg = *argv.offset(optind as isize);
+            if current_arg.is_null() || *current_arg != b'-' as c_char
+                || string::strcmp(current_arg, b"-\0".as_ptr() as _) == 0
+            {
+                -1
+            } else if string::strcmp(current_arg, b"--\0".as_ptr() as _) == 0 {
+                optind += 1;
+                -1
+            } else {
+                // remove the '-'
+                let current_arg = current_arg.offset(1);
+
+                parse_arg(argc, argv, current_arg, optstring)
+            }
+        }
+    } else {
+        parse_arg(argc, argv, CURRENT_OPT, optstring)
+    }
+}
+
+unsafe fn parse_arg(
+    argc: c_int,
+    argv: *const *mut c_char,
+    current_arg: *mut c_char,
+    optstring: *const c_char,
+) -> c_int {
+    let update_current_opt = || {
+        CURRENT_OPT = current_arg.offset(1);
+        if *CURRENT_OPT == 0 {
+            optind += 1;
+        }
+    };
+
+    let print_error = |desc: &[u8]| {
+        // NOTE: we don't use fprintf to get around the usage of va_list
+        stdio::fputs(*argv as _, &mut *stdio::stderr);
+        stdio::fputs(desc.as_ptr() as _, &mut *stdio::stderr);
+        stdio::fputc(*current_arg as _, &mut *stdio::stderr);
+        stdio::fputc(b'\n' as _, &mut *stdio::stderr);
+    };
+
+    match find_option(*current_arg, optstring) {
+        Some(GetoptOption::Flag) => {
+            update_current_opt();
+
+            *current_arg as c_int
+        }
+        Some(GetoptOption::OptArg) => {
+            CURRENT_OPT = b"\0".as_ptr() as _;
+            if *current_arg.offset(1) == 0 {
+                optind += 2;
+                if optind > argc {
+                    CURRENT_OPT = ptr::null_mut();
+
+                    optopt = *current_arg as c_int;
+                    let errch = if *optstring == b':' as c_char {
+                        b':'
+                    } else {
+                        if opterr != 0 {
+                            print_error(b": option requries an argument -- \0");
+                        }
+
+                        b'?'
+                    };
+                    errch as c_int
+                } else {
+                    optarg = *argv.offset(optind as isize - 1);
+
+                    *current_arg as c_int
+                }
+            } else {
+                optarg = current_arg.offset(1);
+                optind += 1;
+
+                *current_arg as c_int
+            }
+        }
+        None => {
+            // couldn't find the given option in optstring
+            if opterr != 0 {
+                print_error(b": illegal option -- \0");
+            }
+
+            update_current_opt();
+
+            optopt = *current_arg as _;
+            b'?' as c_int
+        }
+    }
+}
+
+enum GetoptOption {
+    Flag,
+    OptArg,
+}
+
+unsafe fn find_option(ch: c_char, optstring: *const c_char) -> Option<GetoptOption> {
+    let mut i = 0;
+
+    while *optstring.offset(i) != 0 {
+        if *optstring.offset(i) == ch {
+            let result = if *optstring.offset(i + 1) == b':' as c_char {
+                GetoptOption::OptArg
+            } else {
+                GetoptOption::Flag
+            };
+            return Some(result);
+        }
+        i += 1;
+    }
+
+    None
+}
diff --git a/src/unistd/src/lib.rs b/src/unistd/src/lib.rs
index 7915a7e1421b8b790bf5e8b9b8d3a53546e0ef9d..e5aa6bc92656f5305711da829ae6aaacc03426a1 100644
--- a/src/unistd/src/lib.rs
+++ b/src/unistd/src/lib.rs
@@ -3,10 +3,15 @@
 #![no_std]
 
 extern crate platform;
+extern crate stdio;
+extern crate string;
 
 pub use platform::types::*;
+pub use getopt::*;
 use core::ptr;
 
+mod getopt;
+
 pub const R_OK: c_int = 1;
 pub const W_OK: c_int = 2;
 pub const X_OK: c_int = 4;
@@ -204,11 +209,6 @@ pub extern "C" fn getlogin_r(name: *mut c_char, namesize: size_t) -> c_int {
     unimplemented!();
 }
 
-#[no_mangle]
-pub extern "C" fn getopt(argc: c_int, argv: *const *mut c_char, opstring: *const c_char) -> c_int {
-    unimplemented!();
-}
-
 #[no_mangle]
 pub extern "C" fn getpagesize() -> c_int {
     unimplemented!();
diff --git a/tests/.gitignore b/tests/.gitignore
index ff5cc28a8c266c21d6c227ce6743e1c49267f02f..e946dbbed8ade741f96369f63043b428ed8e20ba 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -15,25 +15,36 @@
 /fsync
 /ftruncate
 /getid
+/getc_unget
 /link
 /math
 /mem
-/setid
-/sleep
 /pipe
 /printf
 /rmdir
 /setid
+/setid
+/sleep
 /sprintf
+/stdlib/a64l
 /stdlib/bsearch
+/stdlib/rand
 /stdlib/strtol
 /stdlib/a64l
-/string/strncmp
-/string/strcspn
+/stdio/fwrite
+/stdio/all
+/stdio/freopen
 /string/strchr
+/string/strcspn
+/string/strncmp
+/string/strpbrk
 /string/strrchr
 /string/strspn
+/string/strstr
+/string/strtok
+/string/strtok_r
+/unistd/getopt
 /unlink
 /waitpid
 /write
-
+/time
diff --git a/tests/Makefile b/tests/Makefile
index e1b95b1839e1a3d66a2333907fb0470059a5bf99..cd6117e6e0efaba0f1cd497161e83c5da7237db1 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -12,6 +12,8 @@ EXPECT_BINS=\
 	fcntl \
 	fsync \
 	ftruncate \
+	getid \
+	getc_unget \
 	link \
 	math \
 	mem \
@@ -20,9 +22,13 @@ EXPECT_BINS=\
 	rmdir \
 	sleep \
 	sprintf \
+	stdio/fwrite \
+	stdio/all \
+	stdio/freopen \
 	stdlib/bsearch \
 	stdlib/strtol \
 	stdlib/a64l \
+	stdlib/rand \
 	string/strncmp \
 	string/strcspn \
 	string/strchr \
@@ -32,9 +38,11 @@ EXPECT_BINS=\
 	string/strpbrk \
 	string/strtok \
 	string/strtok_r \
+	unistd/getopt \
 	unlink \
 	waitpid \
-	write
+	write \
+	time
 
 # Binaries that may generate varied output
 BINS=\
diff --git a/tests/expected/unistd/getopt.stderr b/tests/expected/unistd/getopt.stderr
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/tests/expected/unistd/getopt.stdout b/tests/expected/unistd/getopt.stdout
new file mode 100644
index 0000000000000000000000000000000000000000..aba2d44d3f96b0bbb82a1412c44b20ab8680d624
--- /dev/null
+++ b/tests/expected/unistd/getopt.stdout
@@ -0,0 +1,42 @@
+bflg: 0
+aflg: 1
+errflg: 0
+ifile: 
+ofile: arg
+result: 0
+bflg: 0
+aflg: 1
+errflg: 0
+ifile: 
+ofile: arg
+result: 0
+bflg: 0
+aflg: 1
+errflg: 0
+ifile: 
+ofile: arg
+result: 0
+bflg: 0
+aflg: 1
+errflg: 0
+ifile: 
+ofile: arg
+result: 0
+bflg: 0
+aflg: 1
+errflg: 0
+ifile: 
+ofile: arg
+result: 0
+bflg: 0
+aflg: 1
+errflg: 0
+ifile: 
+ofile: arg
+result: 0
+bflg: 0
+aflg: 0
+errflg: 0
+ifile: 
+ofile: 
+result: 0
diff --git a/tests/getc_unget.c b/tests/getc_unget.c
new file mode 100644
index 0000000000000000000000000000000000000000..f8008534fb0c4718f961e58c3c4a9f2dd50539a8
--- /dev/null
+++ b/tests/getc_unget.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main(int argc, char ** argv) {
+	ungetc('h', stdin);
+	char c;
+	if ((c = getchar()) == 'h') {
+		printf("Worked!\n");
+		return 0;
+	}
+	printf("failed :( %c\n", c);
+	return 0;
+}
diff --git a/tests/stdio/all.c b/tests/stdio/all.c
new file mode 100644
index 0000000000000000000000000000000000000000..450829364ef1384a6636be504b8c89a55fbc7709
--- /dev/null
+++ b/tests/stdio/all.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char ** argv) {
+	FILE *f = fopen("stdio/stdio.in", "r");
+	printf("%c\n", fgetc(f));
+	ungetc('H', f);
+	char *in = malloc(30);
+	printf("%s\n", fgets(in, 30, f));
+	return 0;
+}
diff --git a/tests/stdio/freopen.c b/tests/stdio/freopen.c
new file mode 100644
index 0000000000000000000000000000000000000000..7bf3b64f20c3fcdfe351b9465c60eae7692d9a9a
--- /dev/null
+++ b/tests/stdio/freopen.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main(int argc, char ** argv) {
+	freopen("stdio/stdio.in", "r", stdin);
+	char in[6];
+	fgets(in, 6, stdin);
+	printf("%s\n", in); // should print Hello
+	return 0;
+}
diff --git a/tests/stdio/fwrite.c b/tests/stdio/fwrite.c
new file mode 100644
index 0000000000000000000000000000000000000000..da172d5b58d643ecdb8cdfe22d0151dff848375d
--- /dev/null
+++ b/tests/stdio/fwrite.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+int main(int argc, char ** argv) {
+	FILE *f = fopen("stdio/fwrite.out", "w");
+	char *in = "Hello World!";
+	fputs(in, f); // calls fwrite, helpers::fwritex, internal::to_write and internal::stdio_write
+	fclose(f);
+	return 0;
+}
diff --git a/tests/stdio/fwrite.out b/tests/stdio/fwrite.out
new file mode 100644
index 0000000000000000000000000000000000000000..c57eff55ebc0c54973903af5f72bac72762cf4f4
--- /dev/null
+++ b/tests/stdio/fwrite.out
@@ -0,0 +1 @@
+Hello World!
\ No newline at end of file
diff --git a/tests/stdio/stdio.in b/tests/stdio/stdio.in
new file mode 100644
index 0000000000000000000000000000000000000000..c50d87bb17331bbf91d4b38a48453dc1aee539f1
--- /dev/null
+++ b/tests/stdio/stdio.in
@@ -0,0 +1,3 @@
+Hello World!
+
+Line 2
diff --git a/tests/stdlib/rand.c b/tests/stdlib/rand.c
new file mode 100644
index 0000000000000000000000000000000000000000..484b09906b4d3555280ef0a1b7b92fc41fb0b3a8
--- /dev/null
+++ b/tests/stdlib/rand.c
@@ -0,0 +1,8 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+    printf("%d\n", rand());
+    srand(259);
+    printf("%d\n", rand());
+}
diff --git a/tests/time.c b/tests/time.c
new file mode 100644
index 0000000000000000000000000000000000000000..e6ce164c2585ff7ebfbade6412bb90e057d638c9
--- /dev/null
+++ b/tests/time.c
@@ -0,0 +1,11 @@
+#include <time.h>
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+    timespec tm = {0, 0};
+    clock_gettime(CLOCK_REALTIME, &tm);
+    perror("clock_gettime");
+    time(NULL);
+    perror("time");
+    return 0;
+}
diff --git a/tests/unistd/getopt.c b/tests/unistd/getopt.c
new file mode 100644
index 0000000000000000000000000000000000000000..b1eb262556ab9ab09f1377ce99fda9e9d5ee6246
--- /dev/null
+++ b/tests/unistd/getopt.c
@@ -0,0 +1,69 @@
+#include <unistd.h>
+#include <stdio.h>
+
+#define RUN(...) \
+    { \
+        optind = 1; \
+        optarg = NULL; \
+        opterr = 1; \
+        optopt = -1; \
+        char *args_arr[] = { __VA_ARGS__ }; \
+        printf("result: %d\n", runner(sizeof(args_arr) / sizeof(args_arr[0]), args_arr)); \
+    }
+
+int runner(int argc, char *argv[]) {
+    int c;
+    int bflg = 0, aflg = 0, errflg = 0;
+    char *ifile = "";
+    char *ofile = "";
+
+    while((c = getopt(argc, argv, ":abf:o:")) != -1) {
+        switch(c) {
+            case 'a':
+                if(bflg)
+                    errflg++;
+                else
+                    aflg++;
+                break;
+            case 'b':
+                if(aflg)
+                    errflg++;
+                else
+                    bflg++;
+                break;
+            case 'f':
+                ifile = optarg;
+                break;
+            case 'o':
+                ofile = optarg;
+                break;
+            case ':':
+                printf("Option -%c requires an operand\n", optopt);
+                errflg++;
+                break;
+            case '?':
+                printf("Unrecognized option: -%c\n", optopt);
+                errflg++;
+        }
+    }
+    printf("bflg: %d\n", bflg);
+    printf("aflg: %d\n", aflg);
+    printf("errflg: %d\n", errflg);
+    printf("ifile: %s\n", ifile);
+    printf("ofile: %s\n", ofile);
+    if(errflg) {
+        printf("Usage: info goes here\n");
+        return 2;
+    }
+    return 0;
+}
+
+int main(int argc, const char *argv[]) {
+    RUN("test", "-ao", "arg", "path", "path");
+    RUN("test", "-a", "-o", "arg", "path", "path");
+    RUN("test", "-o", "arg", "-a", "path", "path");
+    RUN("test", "-a", "-o", "arg", "--", "path", "path");
+    RUN("test", "-a", "-oarg", "path", "path");
+    RUN("test", "-aoarg", "path", "path");
+    RUN("test");
+}