(sigaction): Fix return value for the case SIG is one of the signals the implementation uses.

1 files changed, 4 insertions, 1 deletions

diff --git a/linuxthreads/signals.c b/linuxthreads/signals.c
index c044576065..452d860f92 100644
--- a/linuxthreads/signals.c
+++ b/linuxthreads/signals.c
@@ -140,7 +140,10 @@ int sigaction(int sig, const struct sigaction * act,
   if (sig == __pthread_sig_restart ||
       sig == __pthread_sig_cancel ||
       (sig == __pthread_sig_debug && __pthread_sig_debug > 0))
-    return EINVAL;
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
   if (act)
     {
       newact = *act;