There is a serious problem for multi threaded programs doing simple I/O operations in cygwin (open, dup, fdopen, fclose, and close). The attached 81 line test program clearly demonstrates the issue (by hanging and no longer consuming CPU or performing any I/O operations). I'm sure that anyone who ever encountered a stange hang in any program running under cygwin would appreciate a fix for this issue. - Mark Pizzolato -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: iotest.c URL: <http://cygwin.com/pipermail/cygwin/attachments/20050609/930e2cf9/attachment.c> -------------- next part -------------- -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/