https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=230c5df2dfddeb83d31b16f791a079871ba224e8
commit 230c5df2dfddeb83d31b16f791a079871ba224e8 Author: Ken Brown <[email protected]> Date: Thu Apr 18 15:39:52 2019 +0000 Cygwin: FIFO: avoid hang after exec Define fhandler:fifo::fixup_after_exec, which sets listen_client_thr and lct_termination_evt to NULL. This forces the listen_client thread to restart on the first attempt to read after an exec. Previously the exec'd process could hang in fhandler_fifo::raw_read. Diff: --- winsup/cygwin/fhandler.h | 1 + winsup/cygwin/fhandler_fifo.cc | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h index 8fb176b..da007ee 100644 --- a/winsup/cygwin/fhandler.h +++ b/winsup/cygwin/fhandler.h @@ -1301,6 +1301,7 @@ public: ssize_t __reg3 raw_write (const void *ptr, size_t ulen); bool arm (HANDLE h); void fixup_after_fork (HANDLE); + void fixup_after_exec (); int __reg2 fstatvfs (struct statvfs *buf); void clear_readahead () { diff --git a/winsup/cygwin/fhandler_fifo.cc b/winsup/cygwin/fhandler_fifo.cc index 1d02adb..bc9c239 100644 --- a/winsup/cygwin/fhandler_fifo.cc +++ b/winsup/cygwin/fhandler_fifo.cc @@ -943,6 +943,15 @@ fhandler_fifo::fixup_after_fork (HANDLE parent) } void +fhandler_fifo::fixup_after_exec () +{ + fhandler_base::fixup_after_exec (); + listen_client_thr = NULL; + lct_termination_evt = NULL; + fifo_client_unlock (); +} + +void fhandler_fifo::set_close_on_exec (bool val) { fhandler_base::set_close_on_exec (val);
