| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2002 |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| /********************************************************** |
| * |
| * TEST IDENTIFIER : flock03 |
| * |
| * EXECUTED BY : anyone |
| * |
| * TEST TITLE : Error condition test for flock(2) |
| * |
| * TEST CASE TOTAL : 1 |
| * |
| * AUTHOR : Paul Larson <plars@linuxtestproject.org> |
| * |
| * SIGNALS |
| * Uses SIGUSR1 to pause before test if option set. |
| * (See the parse_opts(3) man page). |
| * |
| * DESCRIPTION |
| * This test verifies that flock cannot unlock a file locked |
| * by another task |
| * |
| * Test: |
| * Fork a child processes |
| * The parent flocks a file with LOCK_EX |
| * Child waits for that to happen, then checks to make sure |
| * it is locked. Child then tries to unlock the file. If |
| * the unlock succeeds, the child attempts to lock the |
| * file with LOCK_EX. The test passes if the child is |
| * able to lock the file. |
| * |
| * USAGE: <for command-line> |
| * flock03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p] |
| * where, -c n : Run n copies concurrently |
| * -f : Turn off functional testing |
| * -e : Turn on errno logging |
| * -h : Show help screen |
| * -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 <stdio.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/file.h> |
| #include <sys/wait.h> |
| #include "test.h" |
| #include "usctest.h" |
| |
| void setup(void); |
| void cleanup(void); |
| void childfunc(int); |
| |
| #ifdef UCLINUX |
| static int fd_uc; |
| void childfunc_uc() |
| { |
| childfunc(fd_uc); |
| } |
| #endif |
| |
| char *TCID = "flock03"; /* Test program identifier */ |
| int TST_TOTAL = 3; /* Total number of test cases */ |
| extern int Tst_count; |
| char filename[100]; |
| |
| int main(int argc, char **argv) |
| { |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| pid_t pid; |
| int status; |
| int fd; /* for opening the temporary file */ |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(argc, argv, NULL, NULL)) != |
| NULL) { |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| /*NOTREACHED*/} |
| #ifdef UCLINUX |
| maybe_run_child(&childfunc_uc, "ds", &fd_uc, filename); |
| #endif |
| |
| setup(); |
| |
| /* The following loop checks looping state if -i option given */ |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| /* reset Tst_count in case we are looping */ |
| Tst_count = 0; |
| |
| /* PARENT */ |
| fd = open(filename, O_RDWR); |
| if (fd == -1) |
| tst_brkm(TFAIL, cleanup, "parent failed to open the" |
| "file, errno %d", errno); |
| |
| pid = FORK_OR_VFORK(); |
| if (pid == -1) |
| tst_brkm(TFAIL, cleanup, "fork() failed, errno %d", |
| errno); |
| if (pid == 0) { |
| #ifdef UCLINUX |
| if (self_exec(argv[0], "ds", fd, filename) < 0) |
| tst_brkm(TFAIL, cleanup, "self_exec failed, " |
| "errno &d", errno); |
| #else |
| childfunc(fd); |
| #endif |
| } |
| |
| TEST(flock(fd, LOCK_EX | LOCK_NB)); |
| if (TEST_RETURN != 0) |
| tst_resm(TFAIL, |
| "Parent: Initial attempt to flock() failed, " |
| "errno %d", TEST_ERRNO); |
| else |
| tst_resm(TPASS, |
| "Parent: Initial attempt to flock() passed"); |
| |
| if ((waitpid(pid, &status, 0)) < 0) { |
| tst_resm(TFAIL, "wait() failed"); |
| continue; |
| } |
| if ((WIFEXITED(status)) && (WEXITSTATUS(status) == 0)) |
| tst_resm(TPASS, "flock03 Passed"); |
| else |
| tst_resm(TFAIL, "flock03 Failed"); |
| |
| close(fd); |
| |
| } /* End of TEST_LOOPING */ |
| |
| cleanup(); |
| |
| return 0; |
| |
| } |
| |
| void childfunc(int fd) |
| { |
| int fd2; |
| |
| /* give the parent a chance to lock the file */ |
| sleep(2); |
| |
| fd2 = open(filename, O_RDWR); |
| if (fd2 == -1) |
| tst_brkm(TFAIL, cleanup, "child failed to open the" |
| "file, errno %d", errno); |
| if (flock(fd2, LOCK_EX | LOCK_NB) != -1) |
| tst_resm(TFAIL, "Child: The file was not already locked"); |
| |
| TEST(flock(fd, LOCK_UN)); |
| /* XXX: LOCK_UN does not return an error if there was nothing to |
| * unlock. |
| */ |
| if (TEST_RETURN == -1) |
| tst_resm(TFAIL, |
| "Child: Unable to unlock file locked by parent, " |
| "errno %d", TEST_ERRNO); |
| else |
| tst_resm(TPASS, "Child: Unlocked file locked by parent"); |
| |
| TEST(flock(fd2, LOCK_EX | LOCK_NB)); |
| if (TEST_RETURN == -1) |
| tst_resm(TFAIL, "Child: Unable to relock file after unlocking, " |
| "errno %d", TEST_ERRNO); |
| else |
| tst_resm(TPASS, "Child: flock after unlocking passed"); |
| |
| close(fd); |
| close(fd2); |
| |
| tst_exit(); |
| /* NOT REACHED */ |
| return; |
| } |
| |
| /* |
| * setup() |
| * performs all ONE TIME setup for this test |
| */ |
| void setup(void) |
| { |
| int fd; |
| /* capture signals */ |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| /* Pause if that option was specified |
| * TEST_PAUSE contains the code to fork the test with the -i option. |
| * You want to make sure you do this before you create your temporary |
| * directory. |
| */ |
| TEST_PAUSE; |
| |
| /* Create a unique temporary directory and chdir() to it. */ |
| tst_tmpdir(); |
| |
| sprintf(filename, "flock03.%d", getpid()); |
| |
| /* creating temporary file */ |
| fd = creat(filename, 0666); |
| if (fd < 0) { |
| tst_resm(TFAIL, "creating a new file failed"); |
| |
| TEST_CLEANUP; |
| |
| /* Removing temp dir */ |
| tst_rmdir(); |
| |
| /* exit with return code appropriate for result */ |
| tst_exit(); |
| } |
| close(fd); |
| } |
| |
| /* |
| * cleanup() |
| * performs all ONE TIME cleanup for this test at |
| * completion or premature exit |
| */ |
| void cleanup(void) |
| { |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| unlink(filename); |
| tst_rmdir(); |
| |
| /* exit with return code appropriate for results */ |
| tst_exit(); |
| /*NOTREACHED*/} |