149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* 12/20/2002 Port to LTP robbiew@us.ibm.com */
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/* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
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/*
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* NAME
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* shmt07
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*
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* CALLS
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* shmctl(2) shmget(2) shmat(2)
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*
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* ALGORITHM
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* Create and attach a shared memory segment, write to it
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* and then fork a child. The child Verifies that the shared memory segment
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* that it inherited from the parent conatins the same data that was originally
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* written to it by the parent.
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*
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/utsname.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define ADDR (void *)0x80000
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#define ADDR_IA (void *)0x40000000
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#define SIZE 16*1024
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/** LTP Port **/
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#include "test.h"
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#include "usctest.h"
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char *TCID="shmt07"; /* Test program identifier. */
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int TST_TOTAL=2; /* Total number of test cases. */
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extern int Tst_count; /* Test Case counter for tst_* routines */
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/**************/
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int child(void);
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int rm_shm(int);
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int main(void)
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{
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char *cp=NULL;
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int shmid, pid, status;
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key_t key;
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key = (key_t) getpid() ;
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/*---------------------------------------------------------*/
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errno = 0;
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if ((shmid = shmget(key, SIZE, IPC_CREAT|0666)) < 0) {
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perror("shmget");
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tst_resm(TFAIL,"Error: shmget: shmid = %d, errno = %d\n",
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shmid, errno) ;
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tst_exit() ;
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}
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#ifdef __ia64__
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cp = (char *) shmat(shmid, ADDR_IA, 0);
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#elif defined(__ARM_ARCH_4T__)
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cp = (char *) shmat(shmid, (void *) NULL, 0);
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#else
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cp = (char *) shmat(shmid, ADDR, 0);
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#endif
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if (cp == (char *)-1) {
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perror("shmat");
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tst_resm(TFAIL,
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"Error: shmat: shmid = %d, errno = %d\n",
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shmid, errno) ;
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rm_shm(shmid) ;
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tst_exit() ;
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}
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*cp = '1';
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*(cp+1) = '2';
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tst_resm(TPASS,"shmget,shmat");
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/*-------------------------------------------------------*/
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pid = fork() ;
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switch (pid) {
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case -1 :
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tst_resm(TBROK,"fork failed");
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tst_exit() ;
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case 0 :
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if (*cp != '1') {
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tst_resm(TFAIL, "Error: not 1\n");
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}
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if (*(cp+1) != '2') {
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tst_resm(TFAIL, "Error: not 2\n");
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}
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tst_exit() ;
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}
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/* parent */
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while( wait(&status) < 0 && errno == EINTR ) ;
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tst_resm(TPASS,"cp & cp+1 correct") ;
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/*-----------------------------------------------------------*/
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rm_shm(shmid) ;
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tst_exit() ;
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/*-----------------------------------------------------------*/
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return(0);
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}
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int rm_shm(shmid)
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int shmid ;
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{
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if (shmctl(shmid, IPC_RMID, NULL) == -1) {
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perror("shmctl");
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tst_resm(TFAIL,
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"shmctl Failed to remove: shmid = %d, errno = %d\n",
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shmid, errno) ;
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tst_exit();
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}
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return(0);
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}
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