main: enable device files when running as root

FUSE filesystems are mounted with "nodev" by default. If we run as root,
we can use device files by passing the opposite mount option, "dev".

Fixes xfstests generic/184.

1 files changed, 5 insertions, 0 deletions

diff --git a/main.go b/main.go
index c87cc87..8b2f41a 100644
--- a/main.go
+++ b/main.go
@@ -402,6 +402,11 @@ func initFuseFrontend(key []byte, args argContainer, confFile *configfile.ConfFi
 		// Make the kernel check the file permissions for us
 		mOpts.Options = append(mOpts.Options, "default_permissions")
 	}
+	if os.Getuid() == 0 {
+		// FUSE filesystems are mounted with "nodev" by default. If we run as root,
+		// we can use device files by passing the opposite mount option, "dev".
+		mOpts.Options = append(mOpts.Options, "dev")
+	}
 	// Set values shown in "df -T" and friends
 	// First column, "Filesystem"
 	mOpts.Options = append(mOpts.Options, "fsname="+args.cipherdir)