Add fstatvfs syscall

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "redox_syscall"
-version = "0.1.8"
+version = "0.1.9"
 description = "A Rust library to access raw Redox system calls"
 license = "MIT"
 authors = ["Jeremy Soller <jackpot51@gmail.com>"]

src/call.rs

@@ -1,5 +1,5 @@
 use super::arch::*;
-use super::data::{Stat, TimeSpec};
+use super::data::{Stat, StatVfs, TimeSpec};
 use super::error::Result;
 use super::number::*;
 
@@ -101,6 +101,11 @@ pub fn fstat(fd: usize, stat: &mut Stat) -> Result<usize> {
     unsafe { syscall3(SYS_FSTAT, fd, stat as *mut Stat as usize, mem::size_of::<Stat>()) }
 }
 
+/// Get metadata about a filesystem
+pub fn fstatvfs(fd: usize, stat: &mut StatVfs) -> Result<usize> {
+    unsafe { syscall3(SYS_FSTATVFS, fd, stat as *mut StatVfs as usize, mem::size_of::<StatVfs>()) }
+}
+
 /// Sync a file descriptor to its underlying medium
 pub fn fsync(fd: usize) -> Result<usize> {
     unsafe { syscall1(SYS_FSYNC, fd) }