118 lines
2.6 KiB
C
118 lines
2.6 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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* 03/2001 Written by Wayne Boyer
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* 11/2016 Modified by Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
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*/
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/*
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* Verify that,
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* 1) setpriority(2) fails with -1 and sets errno to EINVAL if 'which'
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* argument was not one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER.
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* 2) setpriority(2) fails with -1 and sets errno to ESRCH if no
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* process was located for 'which' and 'who' arguments.
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* 3) setpriority(2) fails with -1 and sets errno to EACCES if an
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* unprivileged user attempted to lower a process priority.
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* 4) setpriority(2) fails with -1 and sets errno to EPERM if an
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* unprivileged user attempted to change a process which ID is
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* different from the test process.
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*/
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#include <errno.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include "tst_test.h"
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#define NEW_PRIO -2
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#define INVAL_FLAG -1
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#define INVAL_ID -1
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#define INIT_PID 1
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static uid_t uid;
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static struct tcase {
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int which;
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int who;
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int prio;
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int exp_errno;
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int unprivil;
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} tcases[] = {
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{INVAL_FLAG, 0, NEW_PRIO, EINVAL, 0},
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{PRIO_PROCESS, INVAL_ID, NEW_PRIO, ESRCH, 0},
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{PRIO_PGRP, INVAL_ID, NEW_PRIO, ESRCH, 0},
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{PRIO_USER, INVAL_ID, NEW_PRIO, ESRCH, 0},
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{PRIO_PROCESS, 0, NEW_PRIO, EACCES, 1},
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{PRIO_PGRP, 0, NEW_PRIO, EACCES, 1},
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{PRIO_PROCESS, INIT_PID, NEW_PRIO, EPERM, 1}
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};
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static void setpriority_test(struct tcase *tc)
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{
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char *desc = "";
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if (tc->unprivil)
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desc = "as unprivileged user ";
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TEST(setpriority(tc->which, tc->who, tc->prio));
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if (TST_RET != -1) {
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tst_res(TFAIL,
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"setpriority(%d, %d, %d) %ssucceeds unexpectedly "
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"returned %ld", tc->which, tc->who, tc->prio, desc,
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TST_RET);
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return;
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}
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if (TST_ERR != tc->exp_errno) {
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tst_res(TFAIL | TTERRNO,
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"setpriority(%d, %d, %d) %sshould fail with %s",
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tc->which, tc->who, tc->prio, desc,
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tst_strerrno(tc->exp_errno));
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return;
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}
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tst_res(TPASS | TTERRNO,
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"setpriority(%d, %d, %d) %sfails as expected",
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tc->which, tc->who, tc->prio, desc);
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}
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static void verify_setpriority(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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if (tc->unprivil) {
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if (!SAFE_FORK()) {
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SAFE_SETUID(uid);
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SAFE_SETPGID(0, 0);
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setpriority_test(tc);
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exit(0);
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}
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tst_reap_children();
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} else {
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setpriority_test(tc);
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}
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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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uid = ltpuser->pw_uid;
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.needs_root = 1,
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.forks_child = 1,
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.setup = setup,
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.test = verify_setpriority,
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};
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