180 lines
3.9 KiB
C
180 lines
3.9 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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* shmt10.c - test simultaneous shmat/shmdt
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*
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* CALLS
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* shmget, shmat, shmdt, shmctl
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*
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* ALGORITHM
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* Create a shared memory segment and fork a child. Both
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* parent and child spin in a loop attaching and detaching
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* the segment. After completing the specified number of
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* iterations, the child exits and the parent deletes the
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* segment.
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*
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* USAGE
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* shmt10 [-i 500]
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* -i # of iterations, default 500
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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 <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#define SIZE 0x32768
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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="shmt10"; /* 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 shmid;
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key_t key;
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int child(int);
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int rm_shm(int);
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void fini(int);
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int main(int argc, char *argv[])
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{
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char *c1=NULL;
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int pid, st;
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register int i;
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int iter = 500;
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int c;
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extern char *optarg;
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key = (key_t)getpid();
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signal(SIGTERM, fini);
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/*--------------------------------------------------------*/
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while ((c = getopt(argc, argv, "i:")) != EOF) {
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switch (c) {
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case 'i':
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iter = atoi(optarg);
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break;
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default:
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tst_resm(TCONF, "usage: %s [-i <# iterations>]", argv[0]);
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tst_exit();
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}
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}
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/*------------------------------------------------------------------------*/
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if ((shmid = shmget(key, SIZE, IPC_CREAT|0666)) < 0) {
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tst_resm(TFAIL,"shmget") ;
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tst_resm(TFAIL, "Error: shmid = %d\n", shmid) ;
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tst_exit() ;
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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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child(iter);
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tst_exit();
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}
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for (i = 0; i < iter; i++) {
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if ((c1 = (char *) shmat(shmid, (void *)0, 0)) == (char *)-1) {
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tst_resm(TFAIL,
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"Error shmat: iter %d, shmid = %d\n", i, shmid);
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break;
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}
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if (shmdt(c1) < 0) {
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tst_resm(TFAIL,
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"Error: shmdt: iter %d ", i) ;
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break;
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}
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}
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while ( wait(&st) < 0 && errno == EINTR )
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;
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tst_resm(TPASS,"shmat,shmdt");
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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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int child(iter)
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int iter;
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{
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register int i;
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char *c1;
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for (i = 0; i < iter; i++) {
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if ((c1 = (char *) shmat(shmid, (void *)0, 0)) == (char *)-1) {
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tst_resm(TFAIL,
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"Error:child proc: shmat: iter %d, shmid = %d\n",
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i, shmid);
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tst_exit();
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}
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if (shmdt(c1) < 0) {
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tst_resm(TFAIL,
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"Error: child proc: shmdt: iter %d ", i);
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tst_exit();
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}
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}
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return(0);
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}
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void
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fini(int sig)
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{
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rm_shm(shmid);
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}
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