New subject: [Bug 43036] SetNamedPipeHandleState returns ERROR_ACCESS_DENIED when setting PIPE_NOWAIT

16 May 2017


      https://bugs.winehq.org/show_bug.cgi?id=43036
Bug ID: 43036
           Summary: SetNamedPipeHandleState returns ERROR_ACCESS_DENIED
                    when setting PIPE_NOWAIT
           Product: Wine
           Version: 2.7
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs@winehq.org
          Reporter: dan-wine@berrange.com
      Distribution: ---
In GNULIB, there is code which tries to create an implementation of the POSIX
pipe() method for Windows, using the methods _pipe, _get_osfhandle and
SetNamedPipeHandleState. This code works when run on real windows systems (i've
tried Win2k8 myself), but fails when run under Wine (I've tested versions 2.5
and 2.7 in Fedora), with ERROR_ACCESS_DENIED from the SetNamedPipeHandleState
method
Since GNULIB code is fairly complex to follow I created this short demo
program:
$ cat > demo.c <<EOF
#include <sys/unistd.h>
#include <stdio.h>
#include <windows.h>
int nonblock(int fd) {
    HANDLE h = (HANDLE)_get_osfhandle(fd);
    char errbuf[1024];
    DWORD state;
if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0) == 0) {
        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 
              MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, 1024, NULL);
fprintf(stderr, "Failed GetNamedPipeHandleState (%lu) %s", GetLastError(),
errbuf);
    return -1;
    }
if ((state & PIPE_NOWAIT) != 0)  {
        return 0;
    }
state |= PIPE_NOWAIT;
if (SetNamedPipeHandleState (h, &state, NULL, NULL) == 0) {
        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 
              MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, 1024, NULL);
fprintf(stderr, "Failed SetNamedPipeHandleState (%lu) %s", GetLastError(),
errbuf);
    return -1;
    }
    return 0;
}
int main(int argc, char **argv) {
    int fd[2];
if (_pipe(fd, 4096, 0) < 0) {
        fprintf(stderr, "Failed to create pipe\n");
    return -1;
    }
if (nonblock(fd[0]) < 0){
        fprintf(stderr, "Could not set non-blocking on fd[0]\n");
    return -1;
    }
    if (nonblock(fd[1]) < 0){
        fprintf(stderr, "Could not set non-blocking on fd[1]\n");
        return -1;
    }
fprintf(stderr, "Created non-blocking pipe pair\n");
}
EOF
$ i686-w64-mingw32-gcc -Wall -mconsole  -o pipe.exe pipe.c
$ ./pipe.exe 
fixme:winediag:start_process Wine Staging 2.7 is a testing version containing
experimental patches.
fixme:winediag:start_process Please mention your exact version when filing bug
reports on winehq.org.
fixme:sync:GetNamedPipeHandleStateW 0x2c 0x61f8f8 (nil) (nil) (nil) (nil) 0:
semi-stub
Failed SetNamedPipeHandleState (5) Access denied.
Could not set non-blocking on fd[0]
Strangely, this only seems to fail on fd[0] - if I let it run on fd[1] it will
work.
The original GNULIB code I hit the problem on is here:
http://git.savannah.gnu.org/cgit/gnulib.git/tree/lib/pipe2.c
http://git.savannah.gnu.org/cgit/gnulib.git/tree/lib/nonblocking.c
The Fedora Wine 2.7 package I tested on was built with these sources:
SHA512 (wine-2.7.tar.xz) =
1e61b9a4aa1f5f42fb27d11d5254a9ba90f348ad9c4d1ddd4b5da47cd7de638290a20accf7447db9c0e4ced4c2144497cdf5fc906a5eac60e923dabb61f65d3a
SHA512 (wine-2.7.tar.xz.sign) =
b03f4376b10bd8ea66e5e6fc0862a4f948e009862a374677c326744b31c9d9fdcf1efd3b789149fcb6fe617f9c75b1b47d61f884e06e8c0fe16633a99911b667
SHA512 (wine-staging-2.7.tar.gz) =
0abc89af701ae1b95c0eb08e72894c7bc40bdfe792e05b8af9282eab8407bb90b7dfcd4eb3a193a88759ce5d6ea6c2aa9696cac2d744f543c92529bb0d2636ee
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[Bug 43036] New: SetNamedPipeHandleState returns ERROR_ACCESS_DENIED when setting PIPE_NOWAIT