Support changing mtime.

samples/memfs/fs.go

@@ -281,7 +281,7 @@ func (fs *memFS) SetInodeAttributes(
 	defer inode.mu.Unlock()
 
 	// Handle the request.
-	inode.SetAttributes(req.Size, req.Mode)
+	inode.SetAttributes(req.Size, req.Mode, req.Mtime)
 
 	// Fill in the response.
 	resp.Attributes = inode.attributes

samples/memfs/inode.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"time"
 
 	"github.com/jacobsa/fuse"
 	"github.com/jacobsa/fuse/fuseutil"
@@ -373,7 +374,10 @@ func (inode *inode) WriteAt(p []byte, off int64) (n int, err error) {
 // Update attributes from non-nil parameters.
 //
 // EXCLUSIVE_LOCKS_REQUIRED(inode.mu)
-func (inode *inode) SetAttributes(size *uint64, mode *os.FileMode) {
+func (inode *inode) SetAttributes(
+	size *uint64,
+	mode *os.FileMode,
+	mtime *time.Time) {
 	// Update the modification time.
 	inode.attributes.Mtime = inode.clock.Now()
 
@@ -397,4 +401,9 @@ func (inode *inode) SetAttributes(size *uint64, mode *os.FileMode) {
 	if mode != nil {
 		inode.attributes.Mode = *mode
 	}
+
+	// Change mtime?
+	if mtime != nil {
+		inode.attributes.Mtime = *mtime
+	}
 }

samples/memfs/memfs_test.go

@@ -968,7 +968,7 @@ func (t *MemFSTest) Chtimes() {
 	AssertEq(nil, err)
 
 	// Chtimes it.
-	expectedMtime := time.Now().Add(123 * time.Millisecond)
+	expectedMtime := time.Now().Add(123 * time.Second).Round(time.Second)
 	err = os.Chtimes(fileName, time.Time{}, expectedMtime)
 	AssertEq(nil, err)