| /* |
| * 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 : flock04 |
| * |
| * EXECUTED BY : anyone |
| * |
| * TEST TITLE : Testing different locks on flock(2) |
| * |
| * TEST CASE TOTAL : 2 |
| * |
| * AUTHOR : Vatsal Avasthi <vatsal.avasthi@wipro.com> |
| * |
| * SIGNALS |
| * Uses SIGUSR1 to pause before test if option set. |
| * (See the parse_opts(3) man page). |
| * |
| * DESCRIPTION |
| * Tests to verify flock(2) behavior with different locking combinations along |
| * with LOCK_SH. |
| * $ |
| * Setup: |
| * Setup signal handling. |
| * Pause for SIGUSR1 if option specified. |
| * Create a temporary directory and chdir to it. |
| * Create a temporary file |
| * |
| * Test: |
| * Loop if proper options are given. |
| * Parent flocks(2) a file |
| * fork() a child process |
| * Child tries to flock() the already flocked file with different types of locks |
| * Check return code, if system call failed (return == -1) |
| * Log the error number and issue a FAIL message |
| * otherwise issue a PASS message |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * Deletes temporary directory. |
| * |
| * USAGE: <for command-line> |
| * flock04 [-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 <errno.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include "test.h" |
| |
| void setup(void); |
| void cleanup(void); |
| |
| char *TCID = "flock04"; |
| int TST_TOTAL = 2; |
| char filename[100]; |
| int fd, fd1, status; |
| |
| int main(int argc, char **argv) |
| { |
| int lc, retval; |
| const char *msg; |
| pid_t pid; |
| |
| if ((msg = parse_opts(argc, argv, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| TEST(flock(fd, LOCK_SH)); |
| if (TEST_RETURN == 0) { |
| |
| pid = FORK_OR_VFORK(); |
| if (pid == -1) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "fork failed"); |
| if (pid == 0) { |
| fd1 = open(filename, O_RDONLY); |
| retval = flock(fd1, LOCK_SH | LOCK_NB); |
| if (retval == -1) |
| tst_resm(TFAIL, |
| "flock() FAILED to acquire shared lock on existing " |
| "Share Locked file"); |
| else |
| tst_resm(TPASS, |
| "flock() PASSED in acquiring shared lock on " |
| "Share Locked file"); |
| exit(0); |
| } else if (wait(&status) == -1) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "wait failed"); |
| |
| pid = FORK_OR_VFORK(); |
| if (pid == -1) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "fork failed"); |
| |
| if (pid == 0) { |
| fd1 = open(filename, O_RDWR); |
| retval = flock(fd1, LOCK_EX | LOCK_NB); |
| if (retval == -1) { |
| tst_resm(TPASS, |
| "flock() failed to acquire exclusive lock on existing " |
| "share locked file as expected"); |
| } else { |
| tst_resm(TFAIL, |
| "flock() unexpectedly passed in acquiring exclusive lock on " |
| "Share Locked file"); |
| } |
| exit(0); |
| } else if (wait(&status) == -1) |
| tst_resm(TBROK | TERRNO, "wait failed"); |
| TEST(flock(fd, LOCK_UN)); |
| } else |
| tst_resm(TFAIL | TERRNO, "flock failed"); |
| |
| close(fd); |
| close(fd1); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| void setup(void) |
| { |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| sprintf(filename, "flock04.%d", getpid()); |
| |
| fd = creat(filename, 0666); |
| if (fd == -1) |
| tst_brkm(TFAIL, cleanup, "creating a new file failed"); |
| } |
| |
| void cleanup(void) |
| { |
| unlink(filename); |
| |
| tst_rmdir(); |
| } |