int main(){
int isUserP, isMMU;
//fork off the MMU
//fork off the user process
puts("Enter '1' for FCFS, '2' for LRU, and '3' for my own algorithm.");
int type;
fscanf(stdin, "%d", &type);
//create shared memory that contains all the data that user might request
//create a small block of shared memory for requests and responses
int sharedmem = createShm(sizeof(pageStruct)*21);
printf("sharedmem: %d\n", sharedmem);
if (isMMU = fork()) {
sleep(1);
if (isUserP = fork()) {
//main process that knows UserP's pid
int res;
waitpid(isUserP,&res, 0);
puts("\ndone.");
kill(isMMU, SIGKILL); //kill MMU once user is done running
destroyShm();
}else {
runUserP(isMMU);
}
}else {
runMMU(type);
}
}
int main(void)
{
char line[80];
int choice = ' ';
char sem_name1[] = "e";
char sem_name2[] = "s";
char sem_name3[] = "n";
char shm_name[] = "queue";
unsigned long b[bufferSize];
int i;
for(i = 0; i < bufferSize; i++)
b[i] = 0;
//*shm_addr = 0;
do
{
printf("Press i to initialize\n");
choice = getchar();
}
while (choice != 'i');
createNewSemaphore(sem_name1);
createNewSemaphore(sem_name2);
createNewSemaphore(sem_name3);
shm_addr = createShm(shm_name, sizeof(b));
shm_addr = openShm(shm_name);
printf("*********************\n");
printf("*****Initialized*****\n");
printf("*********************\n");
do
{
printf("Press q to close and unlink all\n");
choice = getchar();
}
while (choice != 'q');
closeSemaphore(sem_name1);
closeSemaphore(sem_name2);
closeSemaphore(sem_name3);
CloseAndUnlink(shm_name);
printf("*********************\n");
printf("*******Unlinked******\n");
printf("*********************\n");
return (0);
}
int main(int argc, char **argv)
{
int permission = 0644;
int opt;
size_t size = 0;
int nsems = 0;
int doShm = 0, doMsg = 0, doSem = 0;
progname = program_invocation_short_name;
if (!progname)
progname = "ipcmk";
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
while((opt = getopt(argc, argv, "hM:QS:p:")) != -1) {
switch(opt) {
case 'M':
size = atoi(optarg);
doShm = 1;
break;
case 'Q':
doMsg = 1;
break;
case 'S':
nsems = atoi(optarg);
doSem = 1;
break;
case 'p':
permission = strtoul(optarg, NULL, 8);
break;
case 'h':
usage(EXIT_SUCCESS);
break;
default:
doShm = doMsg = doSem = 0;
break;
}
}
if(!doShm && !doMsg && !doSem)
usage(EXIT_FAILURE);
if (doShm) {
int shmid;
if (-1 == (shmid = createShm(size, permission)))
err(EXIT_FAILURE, _("create share memory failed"));
else
printf(_("Shared memory id: %d\n"), shmid);
}
if (doMsg) {
int msgid;
if (-1 == (msgid = createMsg(permission)))
err(EXIT_FAILURE, _("create message queue failed"));
else
printf(_("Message queue id: %d\n"), msgid);
}
if (doSem) {
int semid;
if (-1 == (semid = createSem(nsems, permission)))
err(EXIT_FAILURE, _("create semaphore failed"));
else
printf(_("Semaphore id: %d\n"), semid);
}
return EXIT_SUCCESS;
}
