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Fix crash on Windows when starting from a console (#2885)

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Fixes #2877
This commit is contained in:
Segev Finer 2022-01-26 15:53:05 +02:00 committed by Anton Kochkov
parent 4f627e9bff
commit cabe3ffb3e
1 changed files with 8 additions and 3 deletions
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11
src/Main.cpp
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@ -22,14 +22,19 @@ static void connectToConsole()
return; return;
} }
// Avoid reconfiguring stderr/stdout if one of them is already connected to a stream. // Avoid reconfiguring stdin/stderr/stdout if one of them is already connected to a stream.
// This can happen when running with stdout/stderr redirected to a file. // This can happen when running with stdout/stderr redirected to a file.
if (0 > fileno(stdout)) { if (0 > fileno(stdin)) {
// Overwrite FD 1 and 2 for the benefit of any code that uses the FDs // Overwrite FD 0, FD 1 and 2 for the benefit of any code that uses the FDs
// directly. This is safe because the CRT allocates FDs 0, 1 and // directly. This is safe because the CRT allocates FDs 0, 1 and
// 2 at startup even if they don't have valid underlying Windows // 2 at startup even if they don't have valid underlying Windows
// handles. This means we won't be overwriting an FD created by // handles. This means we won't be overwriting an FD created by
// _open() after startup. // _open() after startup.
_close(0);
freopen("CONIN$", "r+", stdin);
}
if (0 > fileno(stdout)) {
_close(1); _close(1);
if (freopen("CONOUT$", "a+", stdout)) { if (freopen("CONOUT$", "a+", stdout)) {