Add untested Utimens implementation for loopbackFile.

fuse/files.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"os"
 	"sync"
-	"time"
 	"syscall"
 )
 
@@ -212,11 +211,7 @@ func (f *loopbackFile) GetAttr(a *Attr) Status {
 	return OK
 }
 
-func (f *loopbackFile) Utimens(a *time.Time, m *time.Time) Status {
-	return ENOSYS
-}
-
-// Allocate implemented in files_linux.go
+// Allocate, Utimens implemented in files_linux.go
 
 ////////////////////////////////////////////////////////////////
 

fuse/files_linux.go

 package fuse
 
 import (
+	"time"
 	"syscall"
 )
 
@@ -13,3 +14,28 @@ func (f *loopbackFile) Allocate(off uint64, sz uint64, mode uint32) Status {
 	}
 	return OK
 }
+
+const _UTIME_NOW = ((1 << 30) - 1)
+const _UTIME_OMIT = ((1 << 30) - 2)
+
+func (f *loopbackFile) Utimens(a *time.Time, m *time.Time) Status {
+	tv := make([]syscall.Timeval, 2)
+	if a == nil {
+		tv[0].Usec = _UTIME_OMIT
+	} else {
+		n := a.UnixNano()
+		tv[0].Sec = n / 1e9
+		tv[0].Usec = (n % 1e9) / 1e3
+ 	}
+
+	if m == nil {
+		tv[1].Usec = _UTIME_OMIT
+	} else {
+		n := a.UnixNano()
+		tv[1].Sec = n / 1e9
+		tv[1].Usec = (n % 1e9) / 1e3
+ 	}
+	
+	err := syscall.Futimes(int(f.File.Fd()), tv)
+	return ToStatus(err)	
+}