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authorLibravatar Johannes Schindelin <johannes.schindelin@gmx.de>2016-12-11 12:16:57 +0100
committerLibravatar Junio C Hamano <gitster@pobox.com>2016-12-11 16:15:46 -0800
commitcbb3f3c9b1975c9bdd07f24fc4ef4e504507adaa (patch)
tree3f20d55b4ec5b38f0cf03b8452ee73955c5f559e /t/t2104-update-index-skip-worktree.sh
parentpreparing for 2.10.3 (diff)
downloadtgif-cbb3f3c9b1975c9bdd07f24fc4ef4e504507adaa.tar.xz
mingw: intercept isatty() to handle /dev/null as Git expects it
When Git's source code calls isatty(), it really asks whether the respective file descriptor is connected to an interactive terminal. Windows' _isatty() function, however, determines whether the file descriptor is associated with a character device. And NUL, Windows' equivalent of /dev/null, is a character device. Which means that for years, Git mistakenly detected an associated interactive terminal when being run through the test suite, which almost always redirects stdin, stdout and stderr to /dev/null. This bug only became obvious, and painfully so, when the new bisect--helper entered the `pu` branch and made the automatic build & test time out because t6030 was waiting for an answer. For details, see https://msdn.microsoft.com/en-us/library/f4s0ddew.aspx Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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