Cygwin: raise: align return value and error checking to Linux

raise(2) on Linux returns the same values and sets errno
independent of calling kill(2) or pthread_kill(3).  Align
code to behave the same.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

1 files changed, 6 insertions, 1 deletions

diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc
index f4b468664..2cf750f5c 100644
--- a/winsup/cygwin/signal.cc
+++ b/winsup/cygwin/signal.cc
@@ -303,7 +303,12 @@ raise (int sig)
   pthread *thread = _my_tls.tid;
   if (!thread || !__isthreaded)
     return kill (myself->pid, sig);
-  return pthread_kill (thread, sig);
+
+  /* Make sure to return -1 and set errno, as on Linux. */
+  int err = pthread_kill (thread, sig);
+  if (err)
+    set_errno (err);
+  return err ? -1 : 0;
 }
 
 static int