Remove check for NULL buffer passed to `ptsname_r'

`ptsname_r' is declared in stdlib.h to only accept a `nonnull'
second argument and therefore GCC may choose to make optimizations
based on the assumption that this argument is NULL. This means
that potentially, GCC can optimize away the NULL check at some
point in the future. Since this is a programming interface, we
might as well remove the NULL check ourselves.

This also warrants a change to the `ptsname_r' manual page that
must be submitted to the corresponding mailing list.

In addition, remove the NULL buffer test in login/tst-ptsname.c.

1 files changed, 0 insertions, 1 deletions

diff --git a/login/tst-ptsname.c b/login/tst-ptsname.c
index be8744dfd0..96f0449788 100644
--- a/login/tst-ptsname.c
+++ b/login/tst-ptsname.c
@@ -70,7 +70,6 @@ do_test (void)
   if (fd != -1)
     {
       result |= do_single_test (fd, buf, sizeof (buf), 0);
-      result |= do_single_test (fd, NULL, sizeof (buf), EINVAL);
       result |= do_single_test (fd, buf, 1, ERANGE);
       close (fd);
     }