| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * 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 2 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, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Name: nice01 |
| * |
| * Test Description: |
| * Verify that root can provide a negative value to nice() |
| * and hence root can decrease the nice value of the process |
| * using nice() system call |
| * |
| * Expected Result: |
| * nice() should return value 0 on success and root user should succeed |
| * to decrease the nice value of test process. |
| * |
| * Algorithm: |
| * Setup: |
| * Setup signal handling. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Execute system call |
| * Check return code, if system call failed (return=-1) |
| * Log the errno and Issue a FAIL message. |
| * Otherwise, |
| * Verify the Functionality of system call |
| * if successful, |
| * Issue Functionality-Pass message. |
| * Otherwise, |
| * Issue Functionality-Fail message. |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * |
| * Usage: <for command-line> |
| * nice01 [-c n] [-f] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -f : Turn off functionality Testing. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| * |
| * RESTRICTIONS: |
| * This test should be run by 'super-user' (root) only. |
| * |
| */ |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/time.h> |
| #include <sys/resource.h> |
| |
| #include "test.h" |
| |
| #define NICEINC -12 |
| #define TEMPFILE "temp_file" |
| |
| char *TCID = "nice01"; |
| int TST_TOTAL = 1; |
| |
| int Org_nice; /* original priority of the test process */ |
| FILE *fp; |
| |
| void setup(); /* Main setup function of test */ |
| void cleanup(); /* cleanup function for the test */ |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| const char *msg; |
| int New_nice; /* priority of process after nice() */ |
| int rval; |
| |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| /* |
| * Call nice(2) with an 'incr' parameter set |
| * to a negative value. |
| */ |
| TEST(nice(NICEINC)); |
| |
| /* check return code */ |
| if (TEST_RETURN == -1) { |
| tst_resm(TFAIL, "nice(%d) Failed, errno=%d : %s", |
| NICEINC, TEST_ERRNO, strerror(TEST_ERRNO)); |
| continue; |
| } |
| |
| New_nice = getpriority(PRIO_PROCESS, 0); |
| |
| /* Validate functionality of the nice() */ |
| if (New_nice != (Org_nice + NICEINC)) { |
| tst_resm(TFAIL, "nice() fails to modify the " |
| "priority of process"); |
| } else { |
| tst_resm(TPASS, "Functionality of nice(%d) " |
| "successful", NICEINC); |
| } |
| |
| /* return the process to the original priority */ |
| rval = nice(-NICEINC); |
| |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| /* |
| * setup() - performs all ONE TIME setup for this test. |
| * Make sure the test process uid is super user. |
| * Get the current priority value. |
| */ |
| void setup(void) |
| { |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| /* Make sure the calling process is super-user only */ |
| if (geteuid() != 0) { |
| tst_brkm(TBROK, NULL, "Must be ROOT to run this test."); |
| } |
| |
| TEST_PAUSE; |
| |
| Org_nice = getpriority(PRIO_PROCESS, 0); |
| } |
| |
| /* |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Remove the test directory and testfile created in the setup. |
| */ |
| void cleanup(void) |
| { |
| |
| } |