[Bug libc/15589] freopen would close oldfd even though oldfd is same as newfd

["lizhijian at cn dot fujitsu.com" <sourceware-bugzilla@sourceware.org>]

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http://sourceware.org/bugzilla/show_bug.cgi?id=15589

--- Comment #2 from lizhijian <lizhijian at cn dot fujitsu.com> ---

> # ./freopen-test
> [E+] freopen error(No such file or directory)
> [S+] stat return error(Bad file descriptor)
> [E+] freopen return error(No such file or directory)
> 
sorry ,make some miss,forget to create testfile.
# touch file1 file2
test ouput as follows（glibc=2.16）:
# ./freopen-test
[S+] close stdin
[S+] stat return error(Bad file descriptor)
[E+] freopen return success, but the newfd was closed

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From: "lizhijian at cn dot fujitsu.com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/15589] freopen would close oldfd even though oldfd is same as newfd
Date: Thu, 06 Jun 2013 06:23:00 -0000
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http://sourceware.org/bugzilla/show_bug.cgi?id\x15589

--- Comment #3 from lizhijian <lizhijian at cn dot fujitsu.com> ---
Created attachment 7059
  --> http://sourceware.org/bugzilla/attachment.cgi?idp59&actioníit
patch for freopen

When newfd is same as oldfd, __dup3 return -1 and set errno EINVAL
In this case, it don't close oldfd

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