64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* Ported to LTP: Wayne Boyer
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* Copyright (c) 2016 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* Verify that any user can successfully increase the nice value of
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* the process by passing an increment value (< max. applicable limits) to
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* nice() system call.
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/resource.h>
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#include "tst_test.h"
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#define NICEINC 2
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static void nice_test(void)
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{
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int new_nice;
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int orig_nice;
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orig_nice = SAFE_GETPRIORITY(PRIO_PROCESS, 0);
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TEST(nice(NICEINC));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "nice(%d) returned -1", NICEINC);
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return;
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}
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if (TST_ERR) {
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tst_res(TFAIL | TTERRNO, "nice(%d) failed", NICEINC);
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return;
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}
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new_nice = SAFE_GETPRIORITY(PRIO_PROCESS, 0);
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if (new_nice != (orig_nice + NICEINC)) {
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tst_res(TFAIL, "Process priority %i, expected %i",
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new_nice, orig_nice + NICEINC);
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return;
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}
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tst_res(TPASS, "nice(%d) passed", NICEINC);
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exit(0);
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}
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static void verify_nice(void)
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{
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if (!SAFE_FORK())
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nice_test();
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tst_reap_children();
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}
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static struct tst_test test = {
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.forks_child = 1,
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.test_all = verify_nice,
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};
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