fusefronted: check Fstat return value on file create

The Fstat call should never fail, but still, if it does return an error
it should be handled properly.

1 files changed, 7 insertions, 3 deletions

diff --git a/internal/fusefrontend/file.go b/internal/fusefrontend/file.go
index ce806b6..33afcb9 100644
--- a/internal/fusefrontend/file.go
+++ b/internal/fusefrontend/file.go
@@ -41,9 +41,13 @@ type file struct {
 	header *contentenc.FileHeader
 }
 
-func NewFile(fd *os.File, writeOnly bool, contentEnc *contentenc.ContentEnc) nodefs.File {
+func NewFile(fd *os.File, writeOnly bool, contentEnc *contentenc.ContentEnc) (nodefs.File, fuse.Status) {
 	var st syscall.Stat_t
-	syscall.Fstat(int(fd.Fd()), &st)
+	err := syscall.Fstat(int(fd.Fd()), &st)
+	if err != nil {
+		toggledlog.Warn.Printf("NewFile: Fstat on fd %d failed: %v\n", fd.Fd(), err)
+		return nil, fuse.ToStatus(err)
+	}
 	wlock.register(st.Ino)
 
 	return &file{
@@ -51,7 +55,7 @@ func NewFile(fd *os.File, writeOnly bool, contentEnc *contentenc.ContentEnc) nod
 		writeOnly:  writeOnly,
 		contentEnc: contentEnc,
 		ino:        st.Ino,
-	}
+	}, fuse.OK
 }
 
 // intFd - return the backing file descriptor as an integer. Used for debug