minix/test/ipc/msgrcv/msgrcv05.c

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2009-09-21 16:53:53 +02:00
/*
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* NAME
* msgrcv05.c
*
* DESCRIPTION
* msgrcv05 - test for EINTR error
*
* ALGORITHM
* create a message queue with read/write permissions
* loop if that option was specified
* fork a child who attempts to read a non-existent message with msgrcv()
* parent sends a SIGHUP to the child, then waits for the child to complete
* check the errno value
* issue a PASS message if we get EINTR
* otherwise, the tests fails
* issue a FAIL message
* child exits, parent calls cleanup
*
* USAGE: <for command-line>
* msgrcv05 [-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
*
* RESTRICTIONS
* none
*/
#include "test.h"
#include "usctest.h"
#include "ipcmsg.h"
#include <sys/types.h>
#include <sys/wait.h>
void do_child(void);
void cleanup(void);
void setup(void);
void sighandler(int);
#ifdef UCLINUX
void do_child_uclinux(void);
#endif
char *TCID = "msgrcv05";
int TST_TOTAL = 1;
extern int Tst_count;
int exp_enos[] = {EINTR, 0}; /* 0 terminated list of expected errnos */
int msg_q_1 = -1; /* The message queue id created in setup */
MSGBUF rcv_buf;
pid_t c_pid;
int main(int ac, char **av)
{
int lc; /* loop counter */
char *msg; /* message returned from parse_opts */
/* parse standard options */
if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
}
#ifdef UCLINUX
maybe_run_child(&do_child_uclinux, "d", &msg_q_1);
#endif
setup(); /* global 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;
/*
* fork a child that will attempt to read a non-existent
* message from the queue
*/
if ((c_pid = FORK_OR_VFORK()) == -1) {
tst_brkm(TBROK, cleanup, "could not fork");
}
if (c_pid == 0) { /* child */
/*
* Attempt to read a message without IPC_NOWAIT.
* With no message to read, the child sleeps.
*/
#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 */
usleep(250000);
/* send a signal that must be caught to the child */
if (kill(c_pid, SIGHUP) == -1) {
tst_brkm(TBROK, cleanup, "kill failed");
}
waitpid(c_pid, NULL, 0);
}
}
cleanup();
/*NOTREACHED*/
return(0);
}
/*
* do_child()
*/
void
do_child()
{
TEST(msgrcv(msg_q_1, &rcv_buf, MSGSIZE, 1, 0));
if (TEST_RETURN != -1) {
tst_resm(TFAIL, "call succeeded when error expected");
exit(-1);
}
TEST_ERROR_LOG(TEST_ERRNO);
switch(TEST_ERRNO) {
case EINTR:
tst_resm(TPASS, "expected failure - errno = %d : %s", TEST_ERRNO,
strerror(TEST_ERRNO));
break;
default:
tst_resm(TFAIL, "call failed with an unexpected error - %d : %s",
TEST_ERRNO, strerror(TEST_ERRNO));
break;
}
exit(0);
}
#ifdef UCLINUX
/*
* do_child_uclinux() - capture signals again, then run do_child()
*/
void
do_child_uclinux()
{
tst_sig(FORK, sighandler, cleanup);
do_child();
}
#endif
/*
* sighandler() - handle signals
*/
void
sighandler(int sig)
{
/* we don't need to do anything here */
}
/*
* setup() - performs all the ONE TIME setup for this test.
*/
void
setup(void)
{
/* capture signals */
tst_sig(FORK, sighandler, cleanup);
/* Set up the expected error numbers for -e option */
TEST_EXP_ENOS(exp_enos);
/* Pause if that option was specified */
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();
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");
}
}
/*
* cleanup() - performs all the ONE TIME cleanup for this test at completion
* or premature exit.
*/
void
cleanup(void)
{
/* if it exists, remove the message queue that was created */
rm_queue(msg_q_1);
/* Remove the temporary directory */
tst_rmdir();
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* exit with return code appropriate for results */
tst_exit();
}