50 lines
1019 B
C
50 lines
1019 B
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, nice(2) fails when, a non-root user attempts to increase
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* the priority of a process by specifying a negative increment value.
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*/
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#include <pwd.h>
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#include <unistd.h>
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#include <errno.h>
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#include "tst_test.h"
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#define NICEINC -10
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static void verify_nice(void)
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{
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TEST(nice(NICEINC));
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if (TST_RET != -1) {
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tst_res(TFAIL, "nice(%i) succeded unexpectedly (returned %li)",
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NICEINC, TST_RET);
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return;
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}
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if (TST_ERR != EPERM) {
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tst_res(TFAIL | TTERRNO, "nice(%i) should fail with EPERM",
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NICEINC);
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return;
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}
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tst_res(TPASS, "nice(%i) failed with EPERM", NICEINC);
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}
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static void setup(void)
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{
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struct passwd *ltpuser;
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ltpuser = SAFE_GETPWNAM("nobody");
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SAFE_SETUID(ltpuser->pw_uid);
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}
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static struct tst_test test = {
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.setup = setup,
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.test_all = verify_nice,
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.needs_root = 1,
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};
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