Mercurial > gnulib
view tests/test-getloadavg.c @ 36940:c741bc27922a
maint: update all copyright year number ranges
Run "make update-copyright". Compare to commit 1602f0a from last year.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
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date | Tue, 01 Jan 2013 00:50:58 +0000 |
parents | 821566a12a67 |
children | 344018b6e5d7 |
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/* Test of getting load average. Copyright (C) 2011-2013 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 <http://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[1], argc > 1); if (loads > 0 && argc > 1) putchar ('\n'); if (naptime == 0) break; sleep (naptime); } return 0; }