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Viewing changes to tests/regression/subdomain/syscall_setscheduler.c

  • Committer: Bazaar Package Importer
  • Author(s): Kees Cook
  • Date: 2007-03-23 16:42:01 UTC
  • Revision ID: james.westby@ubuntu.com-20070323164201-jkax6f0oku087b7l
Tags: upstream-2.0.1+510.dfsg
Import upstream version 2.0.1+510.dfsg

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tests/regression/subdomain/syscall_setscheduler.c
 
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/* $Id: syscall_setscheduler.c 61 2006-05-19 18:32:14Z steve-beattie $ */
 
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/*
 
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 *      Copyright (C) 2002-2005 Novell/SUSE
 
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 *
 
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 *      This program is free software; you can redistribute it and/or
 
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 *      modify it under the terms of the GNU General Public License as
 
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 *      published by the Free Software Foundation, version 2 of the
 
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 *      License.
 
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 */
 
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/* test whether the sched_setscheduler(2) syscall is allowed. */
 
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#include <stdlib.h>
 
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#include <stdio.h>
 
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#include <string.h>
 
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#include <errno.h>
 
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#include <sched.h>
 
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int
 
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main (int argc, char * argv[]) {
 
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        struct sched_param sp, saved_sp, new_sp;
 
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        int saved_sched_policy, new_sched_policy;
 
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        /* save the default policy and priority */
 
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        memset(&saved_sp, 0, sizeof(saved_sp));
 
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        saved_sched_policy = sched_getscheduler(0);
 
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        if (saved_sched_policy < 0) {
 
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                perror ("FAIL: Couldn't get scheduler policy\n");
 
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                saved_sched_policy = SCHED_OTHER;
 
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                return errno;
 
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        }
 
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        saved_sp.sched_priority = sched_get_priority_max(saved_sched_policy);
 
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        memset(&sp, 0, sizeof(sp));
 
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        sp.sched_priority = sched_get_priority_max(SCHED_RR) - 1;
 
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        if (sched_setscheduler(0, SCHED_RR, &sp)) {
 
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                perror("FAIL: Can't set SCHED_RR");
 
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                return errno;
 
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        }
 
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        memset(&new_sp, 0, sizeof(new_sp));
 
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        new_sched_policy = sched_getscheduler(0);
 
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        if (new_sched_policy != SCHED_RR) {
 
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                fprintf (stderr, "FAIL: set policy is %d, not SCHED_RR\n",
 
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                        new_sched_policy);
 
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                return 1;
 
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        }
 
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        printf ("PASS\n");
 
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        return 0;
 
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}