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127 lines (102 loc) · 2.91 KB
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/*
*
* 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
* shmt08
*
* CALLS
* shmctl(2) shmget(2) shmat(2) shmdt(2)
*
* ALGORITHM
* Create a shared memory segment. Attach it twice at an address
* that is provided by the system. Detach the previously attached
* segments from the process.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <errno.h>
#define K_1 1024
/** LTP Port **/
#include "test.h"
#include "usctest.h"
char *TCID="shmt08"; /* 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;
int rm_shm(int);
int main(void)
{
char *cp=NULL, *cp1=NULL;
int shmid;
key = (key_t) getpid() ;
errno = 0 ;
/*-------------------------------------------------------*/
if ((shmid = shmget(key, 24*K_1, IPC_CREAT|0666)) < 0) {
perror("shmget");
tst_resm(TFAIL,"Error: shmget: shmid = %d, errno = %d\n",
shmid, errno) ;
tst_exit() ;
}
cp = (char *) shmat(shmid, (void *)0, 0);
if (cp == (char *)-1) {
tst_resm(TFAIL,"shmat1 Failed");
rm_shm(shmid) ;
tst_exit() ;
}
cp1 = (char *) shmat(shmid, (void *)0, 0);
if (cp1 == (char *)-1) {
perror("shmat2");
rm_shm(shmid) ;
tst_exit() ;
}
tst_resm(TPASS,"shmget,shmat");
/*--------------------------------------------------------*/
if (shmdt(cp) < 0) {
perror("shmdt2");
tst_resm(TFAIL,"shmdt:cp") ;
}
if (shmdt(cp1) < 0 ) {
perror("shmdt1");
tst_resm(TFAIL,"shmdt:cp1") ;
}
tst_resm(TPASS,"shmdt");
/*---------------------------------------------------------*/
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);
}