1 files changed, 66 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/posix/sleep.c b/REORG.TODO/sysdeps/posix/sleep.c
new file mode 100644
index 0000000000..b3162baab1
--- /dev/null
+++ b/REORG.TODO/sysdeps/posix/sleep.c
@@ -0,0 +1,66 @@
+/* Sleep for a given number of seconds.  POSIX.1 version.
+   Copyright (C) 1991-2017 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 <time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/param.h>
+
+
+/* Make the process sleep for SECONDS seconds, or until a signal arrives
+   and is not ignored.  The function returns the number of seconds less
+   than SECONDS which it actually slept (zero if it slept the full time).
+   If a signal handler does a `longjmp' or modifies the handling of the
+   SIGALRM signal while inside `sleep' call, the handling of the SIGALRM
+   signal afterwards is undefined.  There is no return value to indicate
+   error, but if `sleep' returns SECONDS, it probably didn't work.  */
+unsigned int
+__sleep (unsigned int seconds)
+{
+  int save_errno = errno;
+
+  const unsigned int max
+    = (unsigned int) (((unsigned long int) (~((time_t) 0))) >> 1);
+  struct timespec ts = { 0, 0 };
+  do
+    {
+      if (sizeof (ts.tv_sec) <= sizeof (seconds))
+        {
+          /* Since SECONDS is unsigned assigning the value to .tv_sec can
+             overflow it.  In this case we have to wait in steps.  */
+          ts.tv_sec += MIN (seconds, max);
+          seconds -= (unsigned int) ts.tv_sec;
+        }
+      else
+        {
+          ts.tv_sec = (time_t) seconds;
+          seconds = 0;
+        }
+
+      if (__nanosleep (&ts, &ts) < 0)
+        /* We were interrupted.
+           Return the number of (whole) seconds we have not yet slept.  */
+        return seconds + ts.tv_sec;
+    }
+  while (seconds > 0);
+
+  __set_errno (save_errno);
+
+  return 0;
+}
+weak_alias (__sleep, sleep)