/*
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* 12/20/2002 Port to LTP robbiew@us.ibm.com */
/* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
/*
* NAME
* shmt05
*
* CALLS
* shmctl(2) shmget(2) shmat(2)
*
* ALGORITHM
* Create two shared memory segments and attach them to the same process
* at two different addresses. The addresses DO BUMP into each other.
* The second attach should Fail.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/utsname.h>
#include <errno.h>
#include <time.h>
/** LTP Port **/
#include "test.h"
char *TCID = "shmt05"; /* Test program identifier. */
int TST_TOTAL = 2; /* Total number of test cases. */
/**************/
key_t key[2];
#define SIZE (2*SHMLBA)
static int rm_shm(int);
int main(void)
{
int shmid, shmid1;
char *cp, *cp1;
srand48((getpid() << 16) + (unsigned)time(NULL));
key[0] = (key_t) lrand48();
key[1] = (key_t) lrand48();
cp = NULL;
cp1 = NULL;
/*--------------------------------------------------------*/
if ((shmid = shmget(key[0], SIZE, IPC_CREAT | 0666)) < 0) {
perror("shmget");
tst_resm(TFAIL,
"Error: shmget: shmid = %d, errno = %d\n",
shmid, errno);
} else {
cp = shmat(shmid, NULL, 0);
if (cp == (char *)-1) {
tst_resm(TFAIL, "shmat");
rm_shm(shmid);
}
}
tst_resm(TPASS, "shmget & shmat");
/*--------------------------------------------------------*/
if ((shmid1 = shmget(key[1], SIZE, IPC_CREAT | 0666)) < 0) {
perror("shmget2");
tst_resm(TFAIL,
"Error: shmget: shmid1 = %d, errno = %d\n",
shmid1, errno);
} else {
cp1 = shmat(shmid1, cp + (SIZE / 2), 0);
if (cp1 != (char *)-1) {
perror("shmat");
tst_resm(TFAIL,
"Error: shmat: shmid1 = %d, addr= %p, errno = %d\n",
shmid1, cp1, errno);
} else {
tst_resm(TPASS, "2nd shmget & shmat");
}
}
/*------------------------------------------------------*/
rm_shm(shmid);
rm_shm(shmid1);
tst_exit();
}
static int rm_shm(int shmid)
{
if (shmctl(shmid, IPC_RMID, NULL) == -1) {
perror("shmctl");
tst_brkm(TFAIL,
NULL,
"shmctl Failed to remove: shmid = %d, errno = %d\n",
shmid, errno);
}
return (0);
}