text: /* Copyright (C) 2003-2020 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
     <https://www.gnu.org/licenses/>.  */
  
  #include <errno.h>
  #include <stdio.h>
  #include <unistd.h>
  #include <sys/time.h>
  #include <time.h>
  
  
  /* Test that nanosleep() does sleep.  */
  static int
  do_test (void)
  {
    /* Current time.  */
    struct timeval tv1;
    (void) gettimeofday (&tv1, NULL);
  
    struct timespec ts;
    ts.tv_sec = 1;
    ts.tv_nsec = 0;
    TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
  
    /* At least one second must have passed.  */
    struct timeval tv2;
    (void) gettimeofday (&tv2, NULL);
  
    tv2.tv_sec -= tv1.tv_sec;
    tv2.tv_usec -= tv1.tv_usec;
    if (tv2.tv_usec < 0)
      --tv2.tv_sec;
  
    if (tv2.tv_sec < 1)
      {
        puts ("nanosleep didn't sleep long enough");
        return 1;
      }
  
    return 0;
  }
  
  #define TEST_FUNCTION do_test ()
  #include "../test-skeleton.c"
  