* child_info.h (child_info_fork::parent_wr_proc_pipe): New element.

* fork.cc (fork_parent): Set parent_wr_proc.
* pinfo.cc (set_myself): Close child_proc_info->parent_wr_proc if it exists
rather than trying to get value from parent _pinfo.
* pinfo.h (enum parent_aleter): New enum.
(pinfo::alert_parent): Declare as returning a value.
(pinfo::parent_alive): New function.
* pinfo.cc (pinfo::alert_parent): Set wr_proc_pipe to invalid non-NULL value
when parent disappears.  Return success of operation.
(proc_waiter): Use __ALERT_* enum for control since these are not really
signals.  Implement __ALERT_ALIVE.
* sigproc.cc (my_parent_is_alive): Eliminate.
* sigproc.h (my_parent_is_alive): Ditto for declaration.
(__SIGREPARENT): Eliminate.

1 files changed, 2 insertions, 1 deletions

diff --git a/winsup/cygwin/child_info.h b/winsup/cygwin/child_info.h
index 7cbcb6fa5..48186e67c 100644
--- a/winsup/cygwin/child_info.h
+++ b/winsup/cygwin/child_info.h
@@ -29,7 +29,7 @@ enum
 
 #define EXEC_MAGIC_SIZE sizeof(child_info)
 
-#define CURR_CHILD_INFO_MAGIC 0x83e9a7b7U
+#define CURR_CHILD_INFO_MAGIC 0x694cd4b8U
 
 /* NOTE: Do not make gratuitous changes to the names or organization of the
    below class.  The layout is checksummed to determine compatibility between
@@ -49,6 +49,7 @@ public:
   void *cygheap_max;
   DWORD cygheap_reserve_sz;
   HANDLE cygheap_h;
+  HANDLE parent_wr_proc_pipe;
   unsigned fhandler_union_cb;
 };