Feature #3526: IO::NULL; null device path name

• Status: Closed
• Assignee: -
• Target version: -

[nobu (Nobuyoshi Nakada)]

なかだです。

IO::NULL を追加するのはどうでしょうか。

diff --git a/io.c b/io.c
index 05b2d45..3793ae5 100644
--- a/io.c
+++ b/io.c
@@ -9623,6 +9623,18 @@ rb_get_argv(void)
    return ARGF.argv;
}

+static const char null_device[] =
+#if defined DOSISH
+    "NUL"
+#elif defined AMIGA || defined __amigaos__
+    "NIL"
+#elif defined __VMS
+    "NL:"
+#else
+    "/dev/null"
+#endif
+    ;
+
/*
 * Document-class: IOError
 *
@@ -9956,6 +9968,8 @@ Init_IO(void)
    rb_define_method(rb_cIO, "autoclose?", rb_io_autoclose_p, 0);
    rb_define_method(rb_cIO, "autoclose=", rb_io_set_autoclose, 1);

+    rb_define_const(rb_cIO, "NULL", rb_obj_freeze(rb_usascii_str_new2(null_device)));
+
    rb_define_variable("$stdin", &rb_stdin);
    rb_stdin = prep_stdio(stdin, FMODE_READABLE, rb_cIO, "<STDIN>");
    rb_define_hooked_variable("$stdout", &rb_stdout, 0, stdout_setter);

---

--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
中田 伸悦

[runpaint (Run Paint Run Run)]

No objection, FWIW. Looks to mirror Python's os.devnull. AFAICT, NUL does not necessarily exist on a Windows system, but that can't be helped. http://bugs.python.org/issue1311 suggests there may be problems stat'ing NUL on Windows--affecting #exists? and #stat, possibly--but I'm not in a position to verify.

[usa (Usaku NAKAMURA)]

こんにちは、なかむら(う)です。

In message "[ruby-dev:41791] [Feature:trunk] IO::NULL; null device path name"
on Jul.03,2010 11:08:26, [e-mail] wrote:

IO::NULL を追加するのはどうでしょうか。

IOだと、なんとなく、IOオブジェクトが返ってくることを期待してしまう気がします。

で、NULLデバイスが欲しい人にはファイル名が欲しい人もいればIOオブジェクトが欲しい人もいるでしょうから、用意するとしたら前者であろうという点は同意できます。

というわけで、File::NULLでどうでしょうか?

それでは。

U.Nakamura [e-mail]

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r29110.
Nobuyoshi, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)