From bbe85a62a2481cbe83c087ada4bec4c8129e90a0 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jackpot51@gmail.com>
Date: Sat, 17 Sep 2016 19:01:34 -0600
Subject: [PATCH] Update libstd. Add CWD and associated syscalls. Remove
 debugging

---
 src/lib.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 98fd080..ebfbc0a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,6 +48,7 @@ pub const SYS_FUTEX: usize = 240;
     pub const FUTEX_WAIT: usize = 0;
     pub const FUTEX_WAKE: usize = 1;
     pub const FUTEX_REQUEUE: usize = 2;
+pub const SYS_GETCWD: usize = 183;
 pub const SYS_GETPID: usize = 20;
 pub const SYS_IOPL: usize = 110;
 pub const SYS_LINK: usize = 9;
@@ -153,6 +154,10 @@ pub unsafe fn futex(addr: *mut i32, op: usize, val: i32, val2: usize, addr2: *mu
     syscall5(SYS_FUTEX, addr as usize, op, (val as isize) as usize, val2, addr2 as usize)
 }
 
+pub fn getcwd(buf: &mut [u8]) -> Result<usize> {
+    unsafe { syscall2(SYS_GETCWD, buf.as_mut_ptr() as usize, buf.len()) }
+}
+
 pub fn getpid() -> Result<usize> {
     unsafe { syscall0(SYS_GETPID) }
 }