minix/test/ipc/shmt/shmt07.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
* shmt07
*
* CALLS
* shmctl(2) shmget(2) shmat(2)
*
* ALGORITHM
* Create and attach a shared memory segment, write to it
* and then fork a child. The child Verifies that the shared memory segment
* that it inherited from the parent conatins the same data that was originally
* written to it by the parent.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/utsname.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#define ADDR (void *)0x80000
#define ADDR_IA (void *)0x40000000
#define SIZE 16*1024
/** LTP Port **/
#include "test.h"
#include "usctest.h"
char *TCID="shmt07"; /* Test program identifier. */
int TST_TOTAL=2; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
/**************/
int child(void);
int rm_shm(int);
int main(void)
{
char *cp=NULL;
int shmid, pid, status;
key_t key;
key = (key_t) getpid() ;
/*---------------------------------------------------------*/
errno = 0;
if ((shmid = shmget(key, SIZE, IPC_CREAT|0666)) < 0) {
perror("shmget");
tst_resm(TFAIL,"Error: shmget: shmid = %d, errno = %d\n",
shmid, errno) ;
tst_exit() ;
}
#ifdef __ia64__
cp = (char *) shmat(shmid, ADDR_IA, 0);
#elif defined(__ARM_ARCH_4T__)
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cp = (char *) shmat(shmid, (void *) NULL, 0);
#else
cp = (char *) shmat(shmid, ADDR, 0);
#endif
if (cp == (char *)-1) {
perror("shmat");
tst_resm(TFAIL,
"Error: shmat: shmid = %d, errno = %d\n",
shmid, errno) ;
rm_shm(shmid) ;
tst_exit() ;
}
*cp = '1';
*(cp+1) = '2';
tst_resm(TPASS,"shmget,shmat");
/*-------------------------------------------------------*/
pid = fork() ;
switch (pid) {
case -1 :
tst_resm(TBROK,"fork failed");
tst_exit() ;
case 0 :
if (*cp != '1') {
tst_resm(TFAIL, "Error: not 1\n");
}
if (*(cp+1) != '2') {
tst_resm(TFAIL, "Error: not 2\n");
}
tst_exit() ;
}
/* parent */
while( wait(&status) < 0 && errno == EINTR ) ;
tst_resm(TPASS,"cp & cp+1 correct") ;
/*-----------------------------------------------------------*/
rm_shm(shmid) ;
tst_exit() ;
/*-----------------------------------------------------------*/
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);
}