From 284ab0ad86310df45ecc3887cb6ed2f8cf507e45 Mon Sep 17 00:00:00 2001
From: Siddharth Sinha <sid@scixor.com>
Date: Sun, 5 Apr 2026 20:18:39 +0530
Subject: [PATCH] std.Io.Uring: handle ReadOnlyFileSystem in dirOpenDir and
 dirRealPathFile

f4eecf8d7d added ROFS handling to openat but missed these two read-only
callers, breaking compilation of any Io.Evented program.
---
 lib/std/Io/Uring.zig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/std/Io/Uring.zig b/lib/std/Io/Uring.zig
index 3112a9b463..0b800682a1 100644
--- a/lib/std/Io/Uring.zig
+++ b/lib/std/Io/Uring.zig
@@ -2739,6 +2739,7 @@ fn dirOpenDir(
             error.FileBusy => return errnoBug(.TXTBSY),
             error.PathAlreadyExists => return errnoBug(.EXIST), // Not creating.
             error.OperationUnsupported => return errnoBug(.OPNOTSUPP), // No TMPFILE, no locks.
+            error.ReadOnlyFileSystem => return errnoBug(.ROFS), // Not creating.
             else => |e| return e,
         },
     };
@@ -3164,6 +3165,7 @@ fn dirRealPathFile(
     }, 0) catch |err| switch (err) {
         error.WouldBlock => return errnoBug(.AGAIN),
         error.OperationUnsupported => return errnoBug(.OPNOTSUPP), // Not asking for locks.
+        error.ReadOnlyFileSystem => return errnoBug(.ROFS), // Not creating.
         else => |e| return e,
     };
     defer ev.closeAsync(fd);