linux: Add sendfile(2)

1 files changed, 12 insertions, 0 deletions

diff --git a/src/sys/sendfile.rs b/src/sys/sendfile.rs
new file mode 100644
index 00000000..2c39ea90
--- /dev/null
+++ b/src/sys/sendfile.rs
@@ -0,0 +1,12 @@
+use std::os::unix::io::RawFd;
+use std::ptr;
+
+use libc::{self, off_t};
+
+use {Errno, Result};
+
+pub fn sendfile(out_fd: RawFd, in_fd: RawFd, offset: Option<&mut off_t>, count: usize) -> Result<usize> {
+    let offset = offset.map(|offset| offset as *mut _).unwrap_or(ptr::null_mut());
+    let ret = unsafe { libc::sendfile(out_fd, in_fd, offset, count) };
+    Errno::result(ret).map(|r| r as usize)
+}