[Bug 48027] New: cmd pipe | not triggering ReadFile EOF
WineHQ Bugzilla
wine-bugs at winehq.org
Fri Nov 1 09:50:32 CDT 2019
https://bugs.winehq.org/show_bug.cgi?id=48027
Bug ID: 48027
Summary: cmd pipe | not triggering ReadFile EOF
Product: Wine
Version: 4.18
Hardware: x86
OS: Linux
Status: NEW
Severity: minor
Priority: P2
Component: cmd
Assignee: wine-bugs at winehq.org
Reporter: dark.shadow4 at web.de
Distribution: ---
Test program is find.exe as of wine commit
ccec532879ec14b2e79da08288152a69221ec4d1.
I implemented the program so it waits for ReadFile to return FALSE, that's when
the input is supposed to be over:
######
BOOL success = ReadFile(handle, buffer, 4096, &buffer_max, NULL);
if (!success)
return FALSE;
######
Now that's not right anyways, but it exposes a slight difference in Wine cmd:
1) Following input hangs on Wine, but not on Windows: "echo test | find test"
It works on Wine when using "winetricks -q cmd"
2) Following input hangs on both Windows and Wine: "find test < test.txt"
Wine's implementation of the pipe | uses the redirect operator < internally.
This leads to the pipe working differently on Wine, i.e. blocking ReadFile when
it's not supposed to.
I'm not aware of a real program being affected by that, just noting.
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