Red Bear OS — microkernel OS in Rust, based on Redox

Derivative of Redox OS (https://www.redox-os.org) adding: - AMD GPU driver (amdgpu) via LinuxKPI compat layer - ext4 filesystem support (ext4d scheme daemon) - ACPI fixes for AMD bare metal (x2APIC, DMAR, IVRS, MCFG) - Custom branding (hostname, os-release, boot identity) Build system is full upstream Redox with RBOS overlay in local/. Patches for kernel, base, and relibc are symlinked from local/patches/ and protected from make clean/distclean. Custom recipes live in local/recipes/ with symlinks into the recipes/ search path. Build: make all CONFIG_NAME=redbear-full Sync: ./local/scripts/sync-upstream.sh
2026-04-12 19:05:00 +01:00
commit 50b731f1b7
3392 changed files with 98327 additions and 0 deletions
@@ -0,0 +1,30 @@
+diff --git a/src/header/fcntl/mod.rs b/src/header/fcntl/mod.rs
+--- a/src/header/fcntl/mod.rs
+++ b/src/header/fcntl/mod.rs
+@@ -8,7 +8,8 @@
+     c_str::CStr,
+     error::ResultExt,
+    header::unistd::{close, dup},
+     platform::{
+         Pal, Sys,
+         types::{c_char, c_int, c_short, c_ulonglong, mode_t, off_t, pid_t},
+     },
+ };
+@@ -74,5 +75,17 @@
+         _ => 0,
+     };
+ 
+    if cmd == F_DUPFD_CLOEXEC {
+        let new_fd = dup(fildes);
+        if new_fd < 0 {
+            return -1;
+        }
+        if unsafe { fcntl(new_fd, F_SETFD, FD_CLOEXEC as c_ulonglong) } < 0 {
+            let _ = close(new_fd);
+            return -1;
+        }
+        return new_fd;
+    }
+
+     Sys::fcntl(fildes, cmd, arg).or_minus_one_errno()
+ }