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mingw: follow-up to "replace isatty() hack"

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The version of the "replace isatty() hack" that got merged a few
weeks ago did not actually reflect the latest iteration of the patch
series: v3 was sent out with these changes, as requested by the
reviewer Johannes Sixt:

- reworded the comment about "recycling handles"

- moved the reassignment of the `console` variable before the dup2()
  call so that it is valid at all times

- removed the "handle = INVALID_HANDLE_VALUE" assignment, as the local
  variable `handle` is not used afterwards anyway

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2017-01-18 13:14:35 +01:00 committed by Junio C Hamano
parent a9b8a09c3c
commit 1d3f065e0e
1 changed files with 4 additions and 7 deletions
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11
compat/winansi.c
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@ -494,19 +494,16 @@ static HANDLE swap_osfhnd(int fd, HANDLE new_handle)
* It is because of this implicit close() that we created the
* copy of the original.
*
* Note that the OS can recycle HANDLE (numbers) just like it
* recycles fd (numbers), so we must update the cached value
* of "console". You can use GetFileType() to see that
* handle and _get_osfhandle(fd) may have the same number
* value, but they refer to different actual files now.
* Note that we need to update the cached console handle to the
* duplicated one because the dup2() call will implicitly close
* the original one.
*
* Note that dup2() when given target := {0,1,2} will also
* call SetStdHandle(), so we don't need to worry about that.
*/
dup2(new_fd, fd);
if (console == handle)
console = duplicate;
handle = INVALID_HANDLE_VALUE;
dup2(new_fd, fd);
/* Close the temp fd. This explicitly closes "new_handle"
* (because it has been associated with it).