feat(unstable): add Deno.getUid (#13496)

5 files changed, 57 insertions, 6 deletions

diff --git a/cli/dts/lib.deno.unstable.d.ts b/cli/dts/lib.deno.unstable.d.ts
index bc87ec02a..b8402cd9b 100644
--- a/cli/dts/lib.deno.unstable.d.ts
+++ b/cli/dts/lib.deno.unstable.d.ts
@@ -133,6 +133,18 @@ declare namespace Deno {
    */
   export function networkInterfaces(): NetworkInterfaceInfo[];
 
+  /** **Unstable** new API. yet to be vetted.
+   *
+   * Returns the user id of the process on POSIX platforms. Returns null on windows.
+   *
+   * ```ts
+   * console.log(Deno.getUid());
+   * ```
+   *
+   * Requires `allow-env` permission.
+   */
+  export function getUid(): number | null;
+
   /** All possible types for interfacing with foreign functions */
   export type NativeType =
     | "void"
diff --git a/cli/tests/unit/os_test.ts b/cli/tests/unit/os_test.ts
index bd6bc5747..a469c8c9f 100644
--- a/cli/tests/unit/os_test.ts
+++ b/cli/tests/unit/os_test.ts
@@ -202,3 +202,13 @@ Deno.test({ permissions: { env: true } }, function systemMemoryInfo() {
   assert(info.swapTotal >= 0);
   assert(info.swapFree >= 0);
 });
+
+Deno.test({ permissions: { env: true } }, function getUid() {
+  if (Deno.build.os === "windows") {
+    assertEquals(Deno.getUid(), null);
+  } else {
+    const uid = Deno.getUid();
+    assert(typeof uid === "number");
+    assert(uid > 0);
+  }
+});
diff --git a/runtime/js/30_os.js b/runtime/js/30_os.js
index 38b0acb32..e8467c268 100644
--- a/runtime/js/30_os.js
+++ b/runtime/js/30_os.js
@@ -28,6 +28,10 @@
     return core.opSync("op_network_interfaces");
   }
 
+  function getUid() {
+    return core.opSync("op_getuid");
+  }
+
   // This is an internal only method used by the test harness to override the
   // behavior of exit when the exit sanitizer is enabled.
   let exitHandler = null;
@@ -87,12 +91,13 @@
   window.__bootstrap.os = {
     env,
     execPath,
-    setExitHandler,
     exit,
-    osRelease,
-    systemMemoryInfo,
+    getUid,
     hostname,
     loadavg,
     networkInterfaces,
+    osRelease,
+    setExitHandler,
+    systemMemoryInfo,
   };
 })(this);
diff --git a/runtime/js/90_deno_ns.js b/runtime/js/90_deno_ns.js
index 55cd34914..871062394 100644
--- a/runtime/js/90_deno_ns.js
+++ b/runtime/js/90_deno_ns.js
@@ -122,6 +122,7 @@
     osRelease: __bootstrap.os.osRelease,
     systemMemoryInfo: __bootstrap.os.systemMemoryInfo,
     networkInterfaces: __bootstrap.os.networkInterfaces,
+    getUid: __bootstrap.os.getUid,
     applySourceMap: __bootstrap.errorStack.opApplySourceMap,
     formatDiagnostics: __bootstrap.errorStack.opFormatDiagnostics,
     sleepSync: __bootstrap.timers.sleepSync,
diff --git a/runtime/ops/os.rs b/runtime/ops/os.rs
index 877dbce21..405faf45a 100644
--- a/runtime/ops/os.rs
+++ b/runtime/ops/os.rs
@@ -17,16 +17,17 @@ use std::sync::Arc;
 pub fn init(maybe_exit_code: Option<Arc<AtomicI32>>) -> Extension {
   Extension::builder()
     .ops(vec![
-      ("op_exit", op_sync(op_exit)),
       ("op_env", op_sync(op_env)),
       ("op_exec_path", op_sync(op_exec_path)),
-      ("op_set_env", op_sync(op_set_env)),
-      ("op_get_env", op_sync(op_get_env)),
+      ("op_exit", op_sync(op_exit)),
       ("op_delete_env", op_sync(op_delete_env)),
+      ("op_get_env", op_sync(op_get_env)),
+      ("op_getuid", op_sync(op_getuid)),
       ("op_hostname", op_sync(op_hostname)),
       ("op_loadavg", op_sync(op_loadavg)),
       ("op_network_interfaces", op_sync(op_network_interfaces)),
       ("op_os_release", op_sync(op_os_release)),
+      ("op_set_env", op_sync(op_set_env)),
       ("op_set_exit_code", op_sync(op_set_exit_code)),
       ("op_system_memory_info", op_sync(op_system_memory_info)),
     ])
@@ -237,3 +238,25 @@ fn op_system_memory_info(
     Err(_) => Ok(None),
   }
 }
+
+#[cfg(not(windows))]
+fn op_getuid(
+  state: &mut OpState,
+  _: (),
+  _: (),
+) -> Result<Option<u32>, AnyError> {
+  super::check_unstable(state, "Deno.getUid");
+  state.borrow_mut::<Permissions>().env.check_all()?;
+  unsafe { Ok(Some(libc::getuid())) }
+}
+
+#[cfg(windows)]
+fn op_getuid(
+  state: &mut OpState,
+  _: (),
+  _: (),
+) -> Result<Option<u32>, AnyError> {
+  super::check_unstable(state, "Deno.getUid");
+  state.borrow_mut::<Permissions>().env.check_all()?;
+  Ok(None)
+}