BZ#15380: Fix initstate error return

[Andreas Jaeger]

 From Bugzilla:
"POSIX.1-2001 says:

     RETURN VALUE
        If initstate() is called with size less than 8, it shall return
        NULL.

glibc sets errno to EINVAL for this case, but does not return NULL, thus
violating the standard."

Here's a patch to fix this, ok to commit?

Andreas

2013-04-27  Andreas Jaeger  <aj@suse.de>

	[BZ #15380]
	* stdlib/random.c (weak_alias): Return NULL if
	__initstate fails.

diff --git a/stdlib/random.c b/stdlib/random.c
index 3ed610d..1083973 100644
--- a/stdlib/random.c
+++ b/stdlib/random.c
@@ -234,16 +234,17 @@ __initstate (seed, arg_state, n)
       size_t n;
  {
    int32_t *ostate;
+  int ret;

    __libc_lock_lock (lock);

    ostate = &unsafe_state.state[-1];

-  __initstate_r (seed, arg_state, n, &unsafe_state);
+  ret = __initstate_r (seed, arg_state, n, &unsafe_state);

    __libc_lock_unlock (lock);

-  return (char *) ostate;
+  return (ret == -1) ? NULL : (char *) ostate;
  }

  weak_alias (__initstate, initstate)

-- 
  Andreas Jaeger aj@{suse.com,opensuse.org} Twitter/Identica: jaegerandi
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