On Wed, 10 Jul 2002, Alex Riesen wrote:
> On Tue, Jul 09, 2002 at 10:06:45AM -0400, Richard B. Johnson wrote:
> > I think code that opens a directory as a file is broken. We have
> > opendir() for that and it returns a DIR pointer, not a file descriptor.
> > If the directory was properly opened, one would never attempt to
> > fsync() it.
>
> It's the libc which defines it. Theere no syscall "opendir". How you think
> you can return what sus defines as "DIR*" from the kernel?
>
> offtopic: on aix you can do this: "cat ."
>
Any attempt to open a directory as a file and read it on Linux up to
version 2.4.18 (at least), or on Sun (up to) SunOS 5.5.1, returns
-1 with errno set to ISDIR (21). As mentioned several times, there
are ways to 'cheat', but I was (and have been) talking about POSIX
conformance.
Script started on Wed Jul 10 07:15:46 2002
# od .
od: .: Is a directory
0000000
# cat .
cat: .: Is a directory
# exit
exit
Script done on Wed Jul 10 07:15:58 2002
Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
Windows-2000/Professional isn't.
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This archive was generated by hypermail 2b29 : Mon Jul 15 2002 - 22:00:17 EST