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Cygwin: FIFO: duplicate the i/o handle when opening a duplexer 

Don't use the same i/o handle for the first client handler as is used
for the fhandler itself; this can lead to a later attempt to close the
same handle twice.  Instead use a duplicate.
This commit is contained in:
Ken Brown 2019-04-20 11:49:35 -04:00
parent 4ecea14a58
commit ef269531a9
1 changed files with 8 additions and 1 deletions
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9
winsup/cygwin/fhandler_fifo.cc
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@ -480,7 +480,14 @@ fhandler_fifo::open (int flags, mode_t)
res = error_errno_set; res = error_errno_set;
goto out; goto out;
} }
fh->set_handle (ph); if (!DuplicateHandle (GetCurrentProcess (), ph, GetCurrentProcess (),
&fh->get_handle (), 0, true, DUPLICATE_SAME_ACCESS))
{
res = error_set_errno;
fh->close ();
delete fh;
goto out;
}
fh->set_flags (flags); fh->set_flags (flags);
if (!(connect_evt = create_event ())) if (!(connect_evt = create_event ()))
{ {