| /* |
| * |
| * 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 |
| */ |
| |
| /* |
| * NAME |
| * msgsnd06.c |
| * |
| * DESCRIPTION |
| * msgsnd06 - test for EIDRM error |
| * |
| * ALGORITHM |
| * loop if that option was specified |
| * create a message queue with read/write permissions |
| * initialize a message buffer with a known message and type |
| * enqueue messages in a loop until the queue is full |
| * fork a child process |
| * child attempts to enqueue a message to the full queue and sleeps |
| * parent removes the queue and then exits |
| * child get a return from msgsnd() |
| * check the errno value |
| * issue a PASS message if we get EIDRM |
| * otherwise, the tests fails |
| * issue a FAIL message |
| * call cleanup |
| * |
| * USAGE: <for command-line> |
| * msgsnd06 [-c n] [-e] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -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 |
| * 03/2001 - Written by Wayne Boyer |
| * 14/03/2008 Matthieu Fertré (Matthieu.Fertre@irisa.fr) |
| * - Fix concurrency issue. Due to the use of usleep function to |
| * synchronize processes, synchronization issues can occur on a loaded |
| * system. Fix this by using pipes to synchronize processes. |
| * |
| * RESTRICTIONS |
| * none |
| */ |
| |
| #include <sys/wait.h> |
| #include "test.h" |
| |
| #include "ipcmsg.h" |
| #include "libtestsuite.h" |
| |
| void cleanup(void); |
| void setup(void); |
| void do_child(void); |
| |
| char *TCID = "msgsnd06"; |
| int TST_TOTAL = 1; |
| |
| int msg_q_1 = -1; /* The message queue id created in setup */ |
| |
| int sync_pipes[2]; |
| |
| MSGBUF msg_buf; |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| const char *msg; |
| pid_t c_pid; |
| int status, e_code; |
| |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| #ifdef UCLINUX |
| #define PIPE_NAME "msgsnd06" |
| maybe_run_child(&do_child, "d", &msg_q_1); |
| #endif |
| |
| setup(); /* global setup */ |
| |
| if (sync_pipe_create(sync_pipes, PIPE_NAME) == -1) |
| tst_brkm(TBROK, cleanup, "sync_pipe_create failed"); |
| |
| /* 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; |
| |
| msgkey = getipckey(); |
| |
| /* create a message queue with read/write permission */ |
| if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW)) |
| == -1) { |
| tst_brkm(TBROK, cleanup, "Can't create message queue"); |
| } |
| |
| /* initialize the message buffer */ |
| init_buf(&msg_buf, MSGTYPE, MSGSIZE); |
| |
| /* write messages to the queue until it is full */ |
| while (msgsnd(msg_q_1, &msg_buf, MSGSIZE, IPC_NOWAIT) != -1) { |
| msg_buf.mtype += 1; |
| } |
| |
| /* |
| * fork a child that will attempt to write a message |
| * to the queue without IPC_NOWAIT |
| */ |
| if ((c_pid = FORK_OR_VFORK()) == -1) { |
| tst_brkm(TBROK, cleanup, "could not fork"); |
| } |
| |
| if (c_pid == 0) { /* child */ |
| |
| #ifdef UCLINUX |
| if (self_exec(av[0], "d", msg_q_1) < 0) { |
| tst_brkm(TBROK, cleanup, "could not self_exec"); |
| } |
| #else |
| do_child(); |
| #endif |
| } else { /* parent */ |
| |
| if (sync_pipe_wait(sync_pipes) == -1) |
| tst_brkm(TBROK, cleanup, |
| "sync_pipe_wait failed"); |
| |
| if (sync_pipe_close(sync_pipes, PIPE_NAME) == -1) |
| tst_brkm(TBROK, cleanup, |
| "sync_pipe_close failed"); |
| |
| /* After son has been created, give it a chance to execute the |
| * msgsnd command before we continue. Without this sleep, on SMP machine |
| * the father rm_queue could be executed before the son msgsnd. |
| */ |
| sleep(2); |
| /* remove the queue */ |
| rm_queue(msg_q_1); |
| |
| /* wait for the child to finish */ |
| wait(&status); |
| /* make sure the child returned a good exit status */ |
| e_code = status >> 8; |
| if (e_code != 0) { |
| tst_resm(TFAIL, "Failures reported above"); |
| } |
| } |
| } |
| |
| cleanup(); |
| |
| tst_exit(); |
| } |
| |
| /* |
| * do_child() |
| */ |
| void do_child(void) |
| { |
| int retval = 0; |
| |
| #ifdef UCLINUX |
| /* initialize the message buffer */ |
| init_buf(&msg_buf, MSGTYPE, MSGSIZE); |
| |
| if (sync_pipe_create(sync_pipes, PIPE_NAME) == -1) |
| tst_brkm(TBROK, cleanup, "sync_pipe_create failed"); |
| #endif |
| |
| if (sync_pipe_notify(sync_pipes) == -1) |
| tst_brkm(TBROK, cleanup, "sync_pipe_notify failed"); |
| |
| if (sync_pipe_close(sync_pipes, PIPE_NAME) == -1) |
| tst_brkm(TBROK, cleanup, "sync_pipe_close failed"); |
| /* |
| * Attempt to write another message to the full queue. |
| * Without the IPC_NOWAIT flag, the child sleeps |
| */ |
| TEST(msgsnd(msg_q_1, &msg_buf, MSGSIZE, 0)); |
| |
| if (TEST_RETURN != -1) { |
| retval = 1; |
| tst_resm(TFAIL, "call succeeded when error expected"); |
| exit(retval); |
| } |
| |
| switch (TEST_ERRNO) { |
| case EIDRM: |
| tst_resm(TPASS, "expected failure - errno = %d : %s", |
| TEST_ERRNO, strerror(TEST_ERRNO)); |
| |
| /* mark the queue as invalid as it was removed */ |
| msg_q_1 = -1; |
| break; |
| default: |
| retval = 1; |
| tst_resm(TFAIL, |
| "call failed with an unexpected error - %d : %s", |
| TEST_ERRNO, strerror(TEST_ERRNO)); |
| break; |
| } |
| exit(retval); |
| } |
| |
| /* |
| * setup() - performs all the ONE TIME setup for this test. |
| */ |
| void setup(void) |
| { |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| /* |
| * Create a temporary directory and cd into it. |
| * This helps to ensure that a unique msgkey is created. |
| * See ../lib/libipc.c for more information. |
| */ |
| tst_tmpdir(); |
| } |
| |
| /* |
| * cleanup() - performs all the ONE TIME cleanup for this test at completion |
| * or premature exit. |
| */ |
| void cleanup(void) |
| { |
| |
| tst_rmdir(); |
| |
| } |