kc3-lang/gnulib/tests/test-getloadavg.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• tests/test-getloadavg.c

• /* Test of getting load average.
     Copyright (C) 2011-2023 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #include <stdlib.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (getloadavg, int, (double [], int));
  
  #include <errno.h>
  #include <stdio.h>
  #include <unistd.h>
  
  static void
  check_avg (int minutes, double avg, int printit)
  {
    if (printit)
      printf ("%d-minute: %f  ", minutes, avg);
    else
      {
        /* Plausibility checks.  */
        if (avg < 0.01)
          printf ("suspiciously low %d-minute average: %f\n", minutes, avg);
        if (avg > 1000000)
          printf ("suspiciously high %d-minute average: %f\n", minutes, avg);
      }
    if (avg < 0 || avg != avg)
      exit (minutes);
  }
  
  /* This program can also be used as a manual test, by invoking it with
     an argument; it then prints the load average.  If the argument is
     nonzero, the manual test repeats forever, sleeping for the stated
     interval between each iteration.  */
  int
  main (int argc, char **argv)
  {
    int naptime = 0;
  
    if (argc > 1)
      naptime = atoi (argv[1]);
  
    while (1)
      {
        double avg[3];
        int loads = getloadavg (avg, 3);
        if (loads == -1)
          {
            if (! (errno == ENOSYS || errno == ENOTSUP || errno == ENOENT))
              return 1;
            perror ("Skipping test; load average not supported");
            return 77;
          }
        if (loads > 0)
          check_avg (1, avg[0], argc > 1);
        if (loads > 1)
          check_avg (5, avg[1], argc > 1);
        if (loads > 2)
          check_avg (15, avg[2], argc > 1);
        if (loads > 0 && argc > 1)
          putchar ('\n');
  
        if (naptime == 0)
          break;
        sleep (naptime);
      }
  
    return 0;
  }
  

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