Messages in this thread |  | | Date | Sun, 14 Oct 2001 19:06:54 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [RFC] "Text file busy" when overwriting libraries |
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On Mon, 15 Oct 2001, Alan Cox wrote: > > > We already can open an exec only file just open("file", 0). > > Wrong.
For exact details: there's a magic value, but it's 3.
open("file", 3)
will open the filename with neither read nor write permissions, but it will actually _require_ both read- and write- permissions, and it was historically a way to open a device just for ioctl's.
I don't think anybody actually uses it any more.
Linus
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