msys2-runtime: restore blocking mode of read pipe on close() #187
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The Cygwin runtime (and for that reason, the MSYS2 runtime, too), change pipes from blocking to non-blocking, which is a problem when the pipe is actually opened by something like Git when it asks a credential helper for information. Git, not expecting the pipe mode to be changed behind its back, will then error out with "fatal: read error: Invalid argument". To address this, this patch was proposed in the Cygwin project as https://inbox.sourceware.org/cygwin-patches/20240830141553.12128-1-takashi.yano@nifty.ne.jp/ Ideally, Cygwin would not even _try_ to fiddle with the pipe mode, therefore this patch was not applied as-is. At time of writing, there is no consensus on any replacement patch, but I have to prepare _something_ for the already-late Git for Windows v2.46.1 (which is likely the last Git for Windows version to support Windows 7 and Windows 8, hence the urgency). And this patch at least improves the situation. This patch will be dropped when Git for Windows will upgrade to MSYS2 runtime v3.5, and hopefully consensus will have been reached about a better fix by that time. This commit corresponds to git-for-windows/msys2-runtime#72 which fixes git-for-windows/git#5115. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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The Cygwin runtime (and for that reason, the MSYS2 runtime, too), change pipes from blocking to non-blocking, which is a problem when the pipe is actually opened by something like Git when it asks a credential helper for information. Git, not expecting the pipe mode to be changed behind its back, will then error out with "fatal: read error: Invalid argument".
To address this, this patch was proposed in the Cygwin project as https://inbox.sourceware.org/cygwin-patches/20240830141553.12128-1-takashi.yano@nifty.ne.jp/
Ideally, Cygwin would not even try to fiddle with the pipe mode, therefore this patch was not applied as-is. At time of writing, there is no consensus on any replacement patch, but I have to prepare something for the already-late Git for Windows v2.46.1 (which is likely the last Git for Windows version to support Windows 7 and Windows 8, hence the urgency). And this patch at least improves the situation.
This patch will be dropped when Git for Windows will upgrade to MSYS2 runtime v3.5, and hopefully consensus will have been reached about a better fix by that time.
This commit corresponds to
git-for-windows/msys2-runtime#72 which fixes git-for-windows/git#5115.