oops, open_write did not create the file

Makefile

@@ -69,7 +69,7 @@ clean:
 
 install: libowfat.a
 	install -d $(INCLUDEDIR) $(MAN3DIR) $(LIBDIR)
-	install -m 644 buffer.h byte.h fmt.h ip4.h ip6.h mmap.h open.h scan.h socket.h str.h stralloc.h uint16.h uint32.h uint64.h $(prefix)/include
+	install -m 644 buffer.h byte.h fmt.h ip4.h ip6.h mmap.h open.h scan.h socket.h str.h stralloc.h uint16.h uint32.h uint64.h open.h $(prefix)/include
 	install -m 644 $(wildcard */*.3) $(MAN3DIR)
 	install -m 644 libowfat.a $(LIBDIR)
 

open/open_write.c

@@ -3,5 +3,5 @@
 #include "open.h"
 
 extern int open_write(const char *filename) {
-  return open(filename,O_WRONLY|O_NDELAY);
+  return open(filename,O_WRONLY|O_CREAT|O_NDELAY);
 }