1 files changed, 48 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/clock_getcpuclockid.c b/REORG.TODO/sysdeps/unix/sysv/linux/clock_getcpuclockid.c
new file mode 100644
index 0000000000..4b1f3b67b0
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/clock_getcpuclockid.c
@@ -0,0 +1,48 @@
+/* clock_getcpuclockid -- Get a clockid_t for process CPU time.  Linux version.
+   Copyright (C) 2004-2017 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 <time.h>
+#include <unistd.h>
+#include "kernel-posix-cpu-timers.h"
+
+int
+__clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
+{
+  /* The clockid_t value is a simple computation from the PID.
+     But we do a clock_getres call to validate it.  */
+
+  const clockid_t pidclock = MAKE_PROCESS_CPUCLOCK (pid, CPUCLOCK_SCHED);
+
+  INTERNAL_SYSCALL_DECL (err);
+  int r = INTERNAL_SYSCALL (clock_getres, err, 2, pidclock, NULL);
+  if (!INTERNAL_SYSCALL_ERROR_P (r, err))
+    {
+      *clock_id = pidclock;
+      return 0;
+    }
+
+  if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
+    {
+      /* The clock_getres system call checked the PID for us.  */
+      return ESRCH;
+    }
+  else
+    return INTERNAL_SYSCALL_ERRNO (r, err);
+}
+weak_alias (__clock_getcpuclockid, clock_getcpuclockid)