1 files changed, 107 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sigwait.c b/REORG.TODO/sysdeps/unix/sysv/linux/sigwait.c
new file mode 100644
index 0000000000..48bcd2fda7
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/sigwait.c
@@ -0,0 +1,107 @@
+/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <signal.h>
+#define __need_NULL
+#include <stddef.h>
+#include <string.h>
+
+#include <nptl/pthreadP.h>
+#include <sysdep-cancel.h>
+#include <sys/syscall.h>
+
+#ifdef __NR_rt_sigtimedwait
+
+/* Return any pending signal or wait for one for the given time.  */
+static int
+do_sigwait (const sigset_t *set, int *sig)
+{
+  int ret;
+
+#ifdef SIGCANCEL
+  sigset_t tmpset;
+  if (set != NULL
+      && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
+# ifdef SIGSETXID
+	  || __builtin_expect (__sigismember (set, SIGSETXID), 0)
+# endif
+	  ))
+    {
+      /* Create a temporary mask without the bit for SIGCANCEL set.  */
+      // We are not copying more than we have to.
+      memcpy (&tmpset, set, _NSIG / 8);
+      __sigdelset (&tmpset, SIGCANCEL);
+# ifdef SIGSETXID
+      __sigdelset (&tmpset, SIGSETXID);
+# endif
+      set = &tmpset;
+    }
+#endif
+
+  /* XXX The size argument hopefully will have to be changed to the
+     real size of the user-level sigset_t.  */
+#ifdef INTERNAL_SYSCALL
+  INTERNAL_SYSCALL_DECL (err);
+  do
+    ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, set,
+			    NULL, NULL, _NSIG / 8);
+  while (INTERNAL_SYSCALL_ERROR_P (ret, err)
+	 && INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR);
+  if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
+    {
+      *sig = ret;
+      ret = 0;
+    }
+  else
+    ret = INTERNAL_SYSCALL_ERRNO (ret, err);
+#else
+  do
+    ret = INLINE_SYSCALL (rt_sigtimedwait, 4, set, NULL, NULL, _NSIG / 8);
+  while (ret == -1 && errno == EINTR);
+  if (ret != -1)
+    {
+      *sig = ret;
+      ret = 0;
+    }
+  else
+    ret = errno;
+#endif
+
+  return ret;
+}
+
+int
+__sigwait (const sigset_t *set, int *sig)
+{
+  if (SINGLE_THREAD_P)
+    return do_sigwait (set, sig);
+
+  int oldtype = LIBC_CANCEL_ASYNC ();
+
+  int result = do_sigwait (set, sig);
+
+  LIBC_CANCEL_RESET (oldtype);
+
+  return result;
+}
+libc_hidden_def (__sigwait)
+weak_alias (__sigwait, sigwait)
+#else
+# include <sysdeps/posix/sigwait.c>
+#endif
+strong_alias (__sigwait, __libc_sigwait)