* signal.cc (_pinfo::kill): Return success on kill(0) only if pid exists or is

in PID_EXITED state.  Report pid 0 when pid does not exist rather than pid -1.
Make debug output reflect actual function call.
* sigproc.cc (stopped_or_terminated): Set process state to reaped when we've
finished waiting for it.
* include/sys/cygwin.h (PID_REAPED): New enum.

1 files changed, 4 insertions, 4 deletions

diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index 78b0f1d5b..8d9f592a4 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -250,7 +250,7 @@ _pinfo::kill (siginfo_t& si)
 	}
       this_pid = pid;
     }
-  else if (si.si_signo == 0 && this)
+  else if (si.si_signo == 0 && this && process_state == PID_EXITED)
     {
       this_process_state = process_state;
       this_pid = pid;
@@ -260,12 +260,12 @@ _pinfo::kill (siginfo_t& si)
     {
       set_errno (ESRCH);
       this_process_state = 0;
-      this_pid = -1;
+      this_pid = 0;
       res = -1;
     }
 
-  syscall_printf ("%d = _pinfo::kill (%d, %d), process_state %p", res, this_pid,
-		  si.si_signo, this_process_state);
+  syscall_printf ("%d = _pinfo::kill (%d), pid %d, process_state %p", res,
+		  si.si_signo, this_pid, this_process_state);
   return res;
 }