minix/test/ipc/shmt/shmt02.c

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2009-09-21 16:53:53 +02:00
/*
*
* 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
*/
/* 12/20/2002 Port to LTP robbiew@us.ibm.com */
/* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
/*
* NAME
* shmt02
*
* CALLS
* shmctl(2) shmget(2)
*
* ALGORITHM
* Create and attach a shared memory segment, write to it
* and then remove it. Verify that the shared memory segment
* is accessible as long as the process is still alive.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/utsname.h>
#include <errno.h>
/** LTP Port **/
#include "test.h"
#include "usctest.h"
char *TCID="shmt02"; /* Test program identifier. */
int TST_TOTAL=3; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
/**************/
#define K_1 1024
int rm_shm(int);
int main(void)
{
register int shmid;
char *cp;
key_t key;
errno = 0;
key = (key_t)getpid() ;
/*----------------------------------------------------------------*/
if ((shmid = shmget(key, 16*K_1, IPC_CREAT|0666)) < 0 ) {
perror("shmget");
tst_resm(TFAIL, "shmget Failed: shmid = %d, errno = %d\n",
shmid, errno) ;
tst_exit() ;
}
tst_resm(TPASS, "shmget") ;
/*----------------------------------------------------------------*/
/* are we doing with ia64 or arm_arch_4t arch */
#if defined (__ia64__) || defined (__ARM_ARCH_4T__) || defined(__minix)
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cp = (char *) shmat(shmid, (void *)NULL, 0);
#else
cp = (char *) shmat(shmid, (void *)0x80000, 0);
#endif
if (cp == (char *)-1) {
perror("shmat");
tst_resm(TFAIL, "shmat Failed: shmid = %d, errno = %d\n",
shmid, errno) ;
rm_shm(shmid) ;
tst_exit() ;
}
*cp = '1';
*(cp+1) = '2';
tst_resm(TPASS, "shmat") ;
/*----------------------------------------------------------------*/
rm_shm(shmid) ;
if ( *cp != '1' || *(cp+1) != '2' ) {
tst_resm(TFAIL,
"Error in shared memory contents: shmid = %d\n",
shmid);
}
tst_resm(TPASS, "Correct shared memory contents") ;
/*------------------------------------------------------------------*/
tst_exit() ;
/*-------------------- THIS LINE IS NOT REACHED -------------------*/
return(0);
}
int rm_shm(shmid)
int shmid ;
{
if (shmctl(shmid, IPC_RMID, NULL) == -1) {
perror("shmctl");
tst_resm(TFAIL,
"shmctl Failed to remove: shmid = %d, errno = %d\n",
shmid, errno) ;
tst_exit();
}
return(0);
}