From d7dc9a47d59c44b8ec0e2bd3923b42d10ac37506 Mon Sep 17 00:00:00 2001
From: chrislu <chris.lu@gmail.com>
Date: Sun, 31 Aug 2025 12:25:41 -0700
Subject: add more posix tests

---
 test/fuse_integration/mmap_unix.go | 85 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 test/fuse_integration/mmap_unix.go

(limited to 'test/fuse_integration/mmap_unix.go')

diff --git a/test/fuse_integration/mmap_unix.go b/test/fuse_integration/mmap_unix.go
new file mode 100644
index 000000000..702a1c032
--- /dev/null
+++ b/test/fuse_integration/mmap_unix.go
@@ -0,0 +1,85 @@
+//go:build unix
+
+package fuse
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// Memory mapping support for Unix-like systems
+
+func mmapFile(fd int, offset int64, length int, prot int, flags int) ([]byte, error) {
+	addr, _, errno := syscall.Syscall6(syscall.SYS_MMAP,
+		0, // addr (let kernel choose)
+		uintptr(length),
+		uintptr(prot),
+		uintptr(flags),
+		uintptr(fd),
+		uintptr(offset))
+
+	if errno != 0 {
+		return nil, errno
+	}
+
+	// Convert the address to a byte slice
+	return (*[1 << 30]byte)(unsafe.Pointer(addr))[:length:length], nil
+}
+
+func munmapFile(data []byte) error {
+	if len(data) == 0 {
+		return nil
+	}
+
+	_, _, errno := syscall.Syscall(syscall.SYS_MUNMAP,
+		uintptr(unsafe.Pointer(&data[0])),
+		uintptr(len(data)),
+		0)
+
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+func msyncFile(data []byte, flags int) error {
+	if len(data) == 0 {
+		return nil
+	}
+
+	_, _, errno := syscall.Syscall(syscall.SYS_MSYNC,
+		uintptr(unsafe.Pointer(&data[0])),
+		uintptr(len(data)),
+		uintptr(flags))
+
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+func isMmapSupported() bool {
+	return true
+}
+
+// Memory protection flags
+const (
+	PROT_READ  = syscall.PROT_READ
+	PROT_WRITE = syscall.PROT_WRITE
+	PROT_EXEC  = syscall.PROT_EXEC
+	PROT_NONE  = syscall.PROT_NONE
+)
+
+// Memory mapping flags
+const (
+	MAP_SHARED    = syscall.MAP_SHARED
+	MAP_PRIVATE   = syscall.MAP_PRIVATE
+	MAP_ANONYMOUS = syscall.MAP_ANON
+)
+
+// Memory sync flags
+const (
+	MS_ASYNC      = syscall.MS_ASYNC
+	MS_SYNC       = syscall.MS_SYNC
+	MS_INVALIDATE = syscall.MS_INVALIDATE
+)
-- 
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