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-rw-r--r--libtrivfs/io-write.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/libtrivfs/io-write.c b/libtrivfs/io-write.c
index 47b06fd5..b91aedcf 100644
--- a/libtrivfs/io-write.c
+++ b/libtrivfs/io-write.c
@@ -15,6 +15,8 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+#include "priv.h"
+
error_t
trivfs_S_io_write (struct protid *cred,
char *data,
@@ -22,5 +24,6 @@ trivfs_S_io_write (struct protid *cred,
off_t off,
int *amt)
{
- return EOPNOTSUPP;
+ assert (!trivfs_support_write);
+ return cred ? EBADF : EOPNOTSUPP;
}