1 files changed, 13 insertions, 0 deletions
diff --git a/fd.c b/fd.c
index d162813..c5c3e57 100644
--- a/fd.c
+++ b/fd.c
@@ -1,4 +1,5 @@
 #include "types.h"
+#include "stat.h"
 #include "param.h"
 #include "x86.h"
 #include "mmu.h"
@@ -121,6 +122,18 @@ fd_close(struct fd *fd)
   release(&fd_table_lock);
 }
 
+int
+fd_stat(struct fd *fd, struct stat *st)
+{
+  if(fd->type == FD_FILE){
+    ilock(fd->ip);
+    stati(fd->ip, st);
+    iunlock(fd->ip);
+    return 0;
+  } else
+    return -1;
+}
+
 void
 fd_incref(struct fd *fd)
 {