1 files changed, 6 insertions, 0 deletions
diff --git a/fs/fd.c b/fs/fd.c
index 1215679..2964883 100644
--- a/fs/fd.c
+++ b/fs/fd.c
@@ -10,31 +10,37 @@
 
 bool fd_write(fd* f,uint8_t c)
 {
+    if(!f->write)kpanic("no write func")
     return f->write(f->data,c);
 }
 
 uint8_t fd_read(fd* f)
 {
+    if(!f->read)kpanic("no read func")
     return f->read(f->data);
 }
 
 bool fd_has(fd* f)
 {
+    if(!f->has)kpanic("no has func")
     return f->has(f->data);
 }
 
 bool fd_eof(fd* f)
 {
+    if(!f->eof)kpanic("no eof func")
     return f->eof(f->data);
 }
 
 bool fd_close(fd* f)
 {
+    if(!f->close)kpanic("no close func")
     return f->close(f->data);
 }
 
 fd fd_dupl(fd* f)
 {
+    if(!f->dupl)kpanic("no dupl func")
     return f->dupl(f);
 }