From 4259c8f7ebc9f5d167556ed142e82e8232706de6 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 24 Jan 2016 19:43:21 +0100
Subject: Only warn once for unsupported fallocate(2) and truncate(2)

Also, print the inode number in Ftruncate warnings.
---
 pathfs_frontend/fs.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'pathfs_frontend/fs.go')

diff --git a/pathfs_frontend/fs.go b/pathfs_frontend/fs.go
index c7dfc82..2b26f6f 100644
--- a/pathfs_frontend/fs.go
+++ b/pathfs_frontend/fs.go
@@ -198,8 +198,14 @@ func (fs *FS) Mknod(path string, mode uint32, dev uint32, context *fuse.Context)
 	return fs.FileSystem.Mknod(cPath, mode, dev, context)
 }
 
+var truncateWarned bool
+
 func (fs *FS) Truncate(path string, offset uint64, context *fuse.Context) (code fuse.Status) {
-	cryptfs.Warn.Printf("Truncate of a closed file is not supported, returning ENOSYS")
+	// Only warn once
+	if !truncateWarned {
+		cryptfs.Warn.Printf("truncate(2) is not supported, returning ENOSYS - use ftruncate(2)")
+		truncateWarned = true
+	}
 	return fuse.ENOSYS
 }
 
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