diff --git a/ChangeLog b/ChangeLog
index 69db729abb..4e178c6a76 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Fri Oct 29 21:27:51 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_io_check_initialized): new function to check uninitialized
+	  object.  [ruby-talk:118234]
+
+	* file.c (rb_file_path), io.c (rb_io_closed): check if initialized.
+
 Fri Oct 29 19:05:33 2004  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* ext/nkf: follow nkf2.0.
diff --git a/file.c b/file.c
index bf2e34fdb6..1238067bb0 100644
--- a/file.c
+++ b/file.c
@@ -138,6 +138,7 @@ rb_file_path(obj)
     OpenFile *fptr;
 
     fptr = RFILE(rb_io_taint_check(obj))->fptr;
+    rb_io_check_initialized(fptr);
     if (!fptr->path) return Qnil;
     return rb_tainted_str_new2(fptr->path);
 }
diff --git a/io.c b/io.c
index 414e70e413..3fa254a2fa 100644
--- a/io.c
+++ b/io.c
@@ -182,12 +182,19 @@ rb_io_taint_check(io)
 }
 
 void
-rb_io_check_closed(fptr)
+rb_io_check_initialized(fptr)
     OpenFile *fptr;
 {
     if (!fptr) {
 	rb_raise(rb_eIOError, "uninitialized stream");
     }
+}
+
+void
+rb_io_check_closed(fptr)
+    OpenFile *fptr;
+{
+    rb_io_check_initialized(fptr);
     if (!fptr->f && !fptr->f2) {
 	rb_raise(rb_eIOError, "closed stream");
     }
@@ -941,7 +948,7 @@ rb_io_fread(ptr, len, f)
 	    ptr += c;
 	    if ((n -= c) <= 0) break;
 	}
-        rb_thread_wait_fd(fileno(f));
+	rb_thread_wait_fd(fileno(f));
 	TRAP_BEG;
 	c = getc(f);
 	TRAP_END;
@@ -2028,6 +2035,7 @@ rb_io_closed(io)
     OpenFile *fptr;
 
     fptr = RFILE(io)->fptr;
+    rb_io_check_initialized(fptr);
     return (fptr->f || fptr->f2)?Qfalse:Qtrue;
 }
 
diff --git a/rubyio.h b/rubyio.h
index 0b77fa1794..f56cec4c40 100644
--- a/rubyio.h
+++ b/rubyio.h
@@ -69,6 +69,7 @@ void rb_io_check_writable _((OpenFile*));
 void rb_io_check_readable _((OpenFile*));
 int rb_io_fptr_finalize _((OpenFile*));
 void rb_io_synchronized _((OpenFile*));
+void rb_io_check_initialized _((OpenFile*));
 void rb_io_check_closed _((OpenFile*));
 int rb_io_wait_readable _((int));
 int rb_io_wait_writable _((int));