Add redox_openat_v1

Cargo.lock

@@ -457,9 +457,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.8"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03a862b389f93e68874fbf580b9de08dd02facb9a788ebadaf4a3fd33cf58834"
+checksum = "d2f103c6d277498fbceb16e84d317e2a400f160f46904d5f5410848c829511a3"
 dependencies = [
  "bitflags",
 ]

Cargo.toml

@@ -61,7 +61,7 @@ features = ["c_api"]
 sc = "0.2.3"
 
 [target.'cfg(target_os = "redox")'.dependencies]
-redox_syscall = "0.5.8"
+redox_syscall = "0.5.11"
 redox-rt = { path = "redox-rt" }
 redox-path = "0.2"
 redox_event = { git = "https://gitlab.redox-os.org/redox-os/event.git", default-features = false, features = [

src/platform/redox/libredox.rs

@@ -128,7 +128,19 @@ pub unsafe extern "C" fn redox_open_v1(
         mode as mode_t,
     ))
 }
-
+#[no_mangle]
+pub unsafe extern "C" fn redox_openat_v1(
+    fd: usize,
+    path_base: *const u8,
+    path_len: usize,
+    flags: u32,
+) -> RawResult {
+    Error::mux(syscall::openat(
+        fd,
+        str::from_utf8_unchecked(slice::from_raw_parts(path_base, path_len)),
+        flags as usize,
+    ))
+}
 #[no_mangle]
 pub unsafe extern "C" fn redox_dup_v1(fd: usize, buf: *const u8, len: usize) -> RawResult {
     Error::mux(syscall::dup(fd, core::slice::from_raw_parts(buf, len)))