minix/test/ipc/shmt/shmt06.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
* shmt06
*
* CALLS
* shmctl(2) shmget(2) shmat(2)
*
* ALGORITHM
* Parent process forks a child. Child pauses until parent has created
* a shared memory segment, attached to it and written to it too. At that
* time child gets the shared memory segment id, attaches to it at a
* different address than the parents and verifies that its contents are
* the same as the contents of the parent attached segment.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/utsname.h>
#include <signal.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#define ADDR (void *)0x80000
#define ADDR1 (void *)0xA0000
#define ADDR_MIPS (void *)0x80000
#define ADDR1_MIPS (void *)0xC0000
#define ADDR_IA (void *)0x40000000
#define ADDR1_IA (void *)0x50000000
#define SIZE 16*1024
/** LTP Port **/
#include "test.h"
#include "usctest.h"
char *TCID="shmt06"; /* Test program identifier. */
int TST_TOTAL=2; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
/**************/
key_t key;
sigset_t sigset;
int child(void);
int rm_shm(int);
int main(void)
{
char *cp=NULL;
int pid, pid1, shmid;
int status;
key = (key_t)getpid() ;
signal(SIGUSR1, SIG_DFL);
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sigemptyset(&sigset);
sigaddset(&sigset,SIGUSR1);
sigprocmask(SIG_BLOCK,&sigset,NULL);
pid = fork();
switch (pid) {
case -1:
tst_resm(TBROK,"fork failed");
tst_exit() ;
case 0:
child();
}
/*------------------------------------------------------*/
if ((shmid = shmget(key, SIZE, IPC_CREAT|0666)) < 0) {
perror("shmget");
tst_resm(TFAIL,"Error: shmget: shmid = %d, errno = %d\n",
shmid, errno) ;
/*
* kill the child if parent failed to do the attach
*/
(void)kill(pid, SIGINT);
}
else {
#ifdef __ia64__
cp = (char *) shmat(shmid, ADDR_IA, 0);
#elif defined(__ARM_ARCH_4T__)
cp = (char *) shmat(shmid, (void*) NULL, 0);
#elif defined(__mips__)
cp = (char *) shmat(shmid, ADDR_MIPS, 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) ;
/* kill the child if parent failed to do the attch */
kill(pid, SIGINT) ;
/* remove shared memory segment */
rm_shm(shmid) ;
tst_exit() ;
}
*cp = 'A';
*(cp+1) = 'B';
*(cp+2) = 'C';
kill(pid, SIGUSR1);
while ( (pid1 = wait(&status)) < 0 &&
(errno == EINTR) ) ;
if (pid1 != pid) {
tst_resm(TFAIL,"Waited on the wrong child") ;
tst_resm(TFAIL,
"Error: wait_status = %d, pid1= %d\n", status, pid1) ;
}
}
tst_resm(TPASS,"shmget,shmat");
/*---------------------------------------------------------------*/
if (shmdt(cp) < 0) {
tst_resm(TFAIL,"shmdt");
}
tst_resm(TPASS,"shmdt");
/*-------------------------------------------------------------*/
rm_shm(shmid) ;
tst_exit() ;
/*-----------------------------------------------------------*/
return(0);
}
int child(void)
{
int shmid ,
chld_pid ;
char *cp;
sigemptyset(&sigset);
sigsuspend(&sigset);
chld_pid = getpid() ;
if ((shmid = shmget(key, SIZE, 0)) < 0) {
perror("shmget:child process");
tst_resm(TFAIL,
"Error: shmget: errno=%d, shmid=%d, child_pid=%d\n",
errno, shmid, chld_pid);
}
else {
#ifdef __ia64__
cp = (char *) shmat(shmid, ADDR1_IA, 0);
#elif defined(__ARM_ARCH_4T__)
cp = (char *) shmat(shmid, (void *) NULL, 0);
#elif defined(__mips__)
cp = (char *) shmat(shmid, ADDR1_MIPS, 0);
#else
cp = (char *) shmat(shmid, ADDR1, 0);
#endif
if (cp == (char *)-1) {
perror("shmat:child process");
tst_resm(TFAIL,
"Error: shmat: errno=%d, shmid=%d, child_pid=%d\n",
errno, shmid, chld_pid);
} else {
if (*cp != 'A') {
tst_resm(TFAIL,"child: not A\n");
}
if (*(cp+1) != 'B') {
tst_resm(TFAIL,"child: not B\n");
}
if (*(cp+2) != 'C') {
tst_resm(TFAIL,"child: not C\n");
}
if (*(cp+8192) != 0) {
tst_resm(TFAIL,"child: not 0\n");
}
}
}
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);
}