int zombie(int* arg) {
int hp = 5000;
int i;
printf("Zombie %d.\n", minithread_id());
for(i = 0; i < hp ; i++);
return 0;
}
/**
* This function does need to be protected because it is only called
* from within a semaphore V, during which interrupts are disabled.
* */
void
minithread_dequeue_and_run(queue_t q) {
minithread_t blocked_thread = NULL;
queue_dequeue(q, (void**)(&blocked_thread) );
if (blocked_thread->status != BLOCKED) {
printf("thread %d should have status BLOCKED\n", minithread_id());
}
minithread_start(blocked_thread);
}
int necromancer(int* arg) {
int num_children = 2999;
int i;
printf("Necromancer %d spawning %d undead threads.\n", minithread_id(), num_children);
for(i = 0; i < num_children; i++){
minithread_fork(zombie, NULL);
}
printf("Come, my servants!\n");
minithread_yield();
printf("Fascinating.\n");
return 0;
}
int shell(int *g) {
char command[BUFFER_SIZE];
char func[BUFFER_SIZE],arg1[BUFFER_SIZE],arg2[BUFFER_SIZE];
int i;
minifile_cd("/"); //cd to root (will also initialize the system if necessary)
printf("%s\n", IDstring);
while(1) {
memset(command,'\0',BUFFER_SIZE);
memset(func,'\0',BUFFER_SIZE);
memset(arg1,'\0',BUFFER_SIZE);
memset(arg2,'\0',BUFFER_SIZE);
put_prompt();
gets(command);
//extract first three strings in command (delimited by spaces)
sscanf(command,"%s %s %s",func,arg1,arg2);
if(strcmp(func,"help") == 0)
help_screen();
else if(strcmp(func,"cd") == 0)
minifile_cd(arg1);
else if(strcmp(func,"ls") == 0 || strcmp(func,"dir") == 0) {
char **files = minifile_ls(arg1);
printf("File listing for %s\n", arg1);
for(i = 0; files != NULL && files[i] != NULL; ++i) {
printf("\t%s\n",files[i]);
free(files[i]);
}
if(files != NULL)
free(files);
} else if(strcmp(func,"pwd") == 0)
printf("%s\n", minifile_pwd());
else if(strcmp(func,"mkdir") == 0)
minifile_mkdir(arg1);
else if(strcmp(func,"rmdir") == 0)
minifile_rmdir(arg1);
else if(strcmp(func,"rm") == 0 || strcmp(func,"del") == 0)
minifile_unlink(arg1);
else if(strcmp(func,"import") == 0)
importfile(arg1,arg2);
else if(strcmp(func,"export") == 0)
exportfile(arg1,arg2);
else if(strcmp(func,"type") == 0)
typefile(arg1);
else if(strcmp(func,"input") == 0)
inputfile(arg1);
else if(strcmp(func,"cp") == 0 || strcmp(func,"copy") == 0)
copy(arg1,arg2);
else if(strcmp(func,"mv") == 0 || strcmp(func,"move") == 0)
move(arg1,arg2);
else if(strcmp(func,"whoami") == 0)
printf("You are minithread %d, running our shell\n",minithread_id());
else if(strcmp(func,"exit") == 0)
break;
else if(strcmp(func,"doscmd") == 0)
system(command+7);
else if(strcmp(func,"exec") == 0) { //this is not efficient -- just for fun!!!
char cmdline[BUFFER_SIZE];
memset(cmdline,'\0',BUFFER_SIZE);
strcpy(cmdline,"tmp0000~.exe ");
strcpy(cmdline+13,command+5+strlen(arg1));
exportfile(arg1,"tmp0000~.exe");
system(cmdline);
system("rm tmp0000~.exe");
}
else printf("%s: Command not found\n",func);
}
printf("Good-bye :-)\n");
return 0;
}
void put_prompt() {
printf("%d@localhost: %s %%",minithread_id(), minifile_pwd());
}
void put_prompt()
{
printf("thread%d@localhost", minithread_id());
printf(": %s %% ", minifile_pwd());
fflush(stdout);
}
