linux: Do not reset signal handler in posix_spawn if it is already SIG_DFL

There is no need to issue another sigaction if the disposition is
already SIG_DFL.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

diff --git a/sysdeps/unix/sysv/linux/spawni.c b/sysdeps/unix/sysv/linux/spawni.c
index b7a6fe320d8af506f2b43b94c25b567b5778b41e..a1a14a58ae88954730446ec94c006c5c00770d3a 100644 (file)
--- a/sysdeps/unix/sysv/linux/spawni.c
+++ b/sysdeps/unix/sysv/linux/spawni.c
@@ -129,7 +129,7 @@ __spawni_child (void *arguments)
          else
            {
              __libc_sigaction (sig, 0, &sa);
-             if (sa.sa_handler == SIG_IGN)
+             if (sa.sa_handler == SIG_IGN || sa.sa_handler == SIG_DFL)
                continue;
              sa.sa_handler = SIG_DFL;
            }