| /* |
| * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| /********************************************************** |
| * |
| * TEST IDENTIFIER : ptrace03 |
| * |
| * EXECUTED BY : anyone |
| * |
| * TEST TITLE : Tests for error conditions |
| * |
| * TEST CASE TOTAL : 3 |
| * |
| * AUTHOR : Saji Kumar.V.R <saji.kumar@wipro.com> |
| * |
| * SIGNALS |
| * Uses SIGUSR1 to pause before test if option set. |
| * (See the parse_opts(3) man page). |
| * |
| * DESCRIPTION |
| * Verifies that |
| * 1) ptrace() returns -1 & sets errno to EPERM while tring to trace |
| * process 1 |
| * (This test case will be executed only if the kernel version |
| * is 2.6.25 or below) |
| * 2) ptrace() returns -1 & sets errno to ESRCH if process with |
| * specified pid does not exist |
| * 3) ptrace() returns -1 & sets errno to EPERM if we are trying |
| * to trace a process which is already been traced |
| * |
| * Setup: |
| * Setup signal handling. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * setup signal handler for SIGUSR2 signal |
| * fork a child |
| * |
| * CHILD: |
| * call ptrace() with proper arguments |
| * if ptrace() failed with expected return value & errno |
| * exit with errno |
| * else |
| * Give proper error message |
| * exit with errno |
| * |
| * PARENT: |
| * Wait for child to finish |
| * if child exits with expected errno |
| * Test Passed |
| * else |
| * Test failed |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * |
| * USAGE: <for command-line> |
| * ptrace03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -h : Show help screen |
| * -f : Turn off functional testing |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -p : Pause for SIGUSR1 before starting |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| ****************************************************************/ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #include <sys/wait.h> |
| #include <pwd.h> |
| |
| #include <config.h> |
| #include "ptrace.h" |
| |
| #include "test.h" |
| #include "usctest.h" |
| |
| #define INVALID_PID 999999 |
| |
| static void setup(void); |
| static void cleanup(void); |
| |
| static int exp_enos[] = { EPERM, ESRCH, 0 }; |
| |
| char *TCID = "ptrace03"; |
| |
| struct test_case_t { |
| enum __ptrace_request request; |
| pid_t pid; |
| int exp_errno; |
| } test_cases[] = { |
| { |
| PTRACE_ATTACH, 1, EPERM}, { |
| PTRACE_ATTACH, INVALID_PID, ESRCH}, { |
| PTRACE_TRACEME, 0, EPERM},}; |
| |
| int TST_TOTAL = sizeof(test_cases) / sizeof(test_cases[0]); |
| |
| int main(int ac, char **av) |
| { |
| |
| int lc, i; |
| char *msg; |
| pid_t child_pid; |
| int status; |
| |
| 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; |
| |
| for (i = 0; i < TST_TOTAL; ++i) { |
| |
| /* since Linux 2.6.26, it's allowed to trace init, |
| so just skip this test case */ |
| if (i == 0 && tst_kvercmp(2, 6, 25) > 0) { |
| tst_resm(TCONF, |
| "this kernel allows to trace init"); |
| continue; |
| } |
| |
| /* fork() */ |
| switch (child_pid = FORK_OR_VFORK()) { |
| |
| case -1: |
| /* fork() failed */ |
| tst_resm(TFAIL, "fork() failed"); |
| continue; |
| |
| case 0: |
| /* Child */ |
| |
| /* setup for third test case */ |
| if (i == 2) { |
| if ((ptrace(PTRACE_TRACEME, 0, |
| NULL, NULL)) == -1) { |
| tst_resm(TWARN, "ptrace()" |
| " falied with errno, %d : %s", |
| errno, |
| strerror(errno)); |
| exit(0); |
| } |
| } |
| |
| TEST(ptrace(test_cases[i].request, |
| test_cases[i].pid, NULL, NULL)); |
| if ((TEST_RETURN == -1) && (TEST_ERRNO == |
| test_cases |
| [i].exp_errno)) { |
| exit(TEST_ERRNO); |
| } else { |
| tst_resm(TWARN | TTERRNO, |
| "ptrace() returned %ld", |
| TEST_RETURN); |
| exit(TEST_ERRNO); |
| } |
| |
| default: |
| /* Parent */ |
| if ((waitpid(child_pid, &status, 0)) < 0) { |
| tst_resm(TFAIL, "waitpid() failed"); |
| continue; |
| } |
| if ((WIFEXITED(status)) && |
| (WEXITSTATUS(status) == |
| test_cases[i].exp_errno)) { |
| tst_resm(TPASS, "Test Passed"); |
| } else { |
| tst_resm(TFAIL, "Test Failed"); |
| } |
| TEST_ERROR_LOG(WEXITSTATUS(status)); |
| } |
| } |
| } |
| |
| /* cleanup and exit */ |
| cleanup(); |
| |
| tst_exit(); |
| |
| } |
| |
| /* setup() - performs all ONE TIME setup for this test */ |
| void setup() |
| { |
| |
| /* capture signals |
| tst_sig(FORK, DEF_HANDLER, cleanup); */ |
| |
| /* set the expected errnos... */ |
| TEST_EXP_ENOS(exp_enos); |
| |
| TEST_PAUSE; |
| |
| } |
| |
| /* |
| *cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| */ |
| void cleanup() |
| { |
| |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| } |