/* Get a clockid_t for the process CPU clock of a given process.  Generic.

   Copyright (C) 2000-2018 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 <shlib-compat.h>

int

__clock_getcpuclockid (pid_t pid, clockid_t *clock_id)

{

  /* We don't allow any process ID but our own.  */

  if (pid != 0 && pid != getpid ())

    return EPERM;

#ifdef CLOCK_PROCESS_CPUTIME_ID

  /* Store the number.  */

  *clock_id = CLOCK_PROCESS_CPUTIME_ID;

  return 0;

#else

  /* We don't have a timer for that.  */

  return ENOENT;

#endif

}

versioned_symbol (libc, __clock_getcpuclockid, clock_getcpuclockid, GLIBC_2_17);

/* clock_getcpuclockid moved to libc in version 2.17;

   old binaries may expect the symbol version it had in librt.  */

#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)

strong_alias (__clock_getcpuclockid, __clock_getcpuclockid_2);

compat_symbol (libc, __clock_getcpuclockid_2, clock_getcpuclockid, GLIBC_2_2);

#endif