void child() {
fprintf(stdout, "Process %d with parent %d start\n", sched_getpid(), sched_getppid());
long long i;
for (i = 0; i < 1000000000; i++) {
if ((i % 100000000) == 0) {
fprintf(stdout, "Process %d at %d\n", sched_getpid(), i);
}
}
sched_exit(sched_getpid());
}
void child1()
{
fprintf(stderr,"HIIII child here! my pid is %d and my parent is %d\n",sched_getpid(),sched_getppid());
long long i;
for (i = 0; i < 1000000000; i++)
{
if (i%100000000==0)
{
fprintf(stderr,"pid=%d, i=%lld, ticks=%d\n",sched_getpid(),i,sched_gettick());
}
}
sched_exit(85);
}
void parent() {
fprintf(stdout, "Process %d with parent %d start\n", sched_getpid(), sched_getppid());
int i, code;
for (i = -2; i < 2; i += 1) {
sched_wait(&code);
fprintf(stdout, "Process %d exited\n", code);
}
return;
}
void parent()
{
fprintf(stderr,"parent hello world my pid is %d and my parent is %d\n",sched_getpid(),sched_getppid());
long long i;
for (i = 0; i < 1000000000; i++)
{
if (i%100000000==0)
{
fprintf(stderr,"pid=%d, i=%lld, ticks=%d\n",sched_getpid(),i,sched_gettick());
}
}
int ret;
sched_wait(&ret);
printf("one child returned %d\n",ret);
sched_wait(&ret);
printf("another child returned %d\n",ret);
sched_exit(0);
}
// INT 80h Handler, kernel entry.
void int_80() {
if(krn) {
return;
}
krn++;
int systemCall = kernel_buffer[0];
int fd = kernel_buffer[1];
int buffer = kernel_buffer[2];
int count = kernel_buffer[3];
int i, j;
Process * current;
Process * p;
int inode;
int _fd;
// Yeah, wanna know why we don't access an array directly? ... Because of big bugs we might have.
switch(systemCall) {
case READY:
kernel_buffer[KERNEL_RETURN] = kernel_ready();
break;
case WRITE:
current = getp();
kernel_buffer[KERNEL_RETURN] = fd_write(current->file_descriptors[fd],(char *)buffer,count);
break;
case READ:
current = getp();
kernel_buffer[KERNEL_RETURN] = fd_read(current->file_descriptors[fd],(char *)buffer,count);
break;
case MKFIFO:
_fd = process_getfreefd();
fd = fd_open(_FD_FIFO, (void *)kernel_buffer[1],kernel_buffer[2]);
if(_fd != -1 && fd != -1) {
getp()->file_descriptors[_fd] = fd;
kernel_buffer[KERNEL_RETURN] = _fd;
}
else {
kernel_buffer[KERNEL_RETURN] = -1;
}
break;
case OPEN:
_fd = process_getfreefd();
fd = fd_open(_FD_FILE, (void *) kernel_buffer[1], kernel_buffer[2]);
if(_fd != -1 && fd >= 0)
{
getp()->file_descriptors[_fd] = fd;
kernel_buffer[KERNEL_RETURN] = _fd;
}
else {
kernel_buffer[KERNEL_RETURN] = fd;
}
break;
case CLOSE:
kernel_buffer[KERNEL_RETURN] = fd_close(getp()->file_descriptors[fd]);
break;
case PCREATE:
kernel_buffer[KERNEL_RETURN] = sched_pcreate(kernel_buffer[1],kernel_buffer[2],kernel_buffer[3]);
break;
case PRUN:
kernel_buffer[KERNEL_RETURN] = sched_prun(kernel_buffer[1]);
break;
case PDUP2:
kernel_buffer[KERNEL_RETURN] = sched_pdup2(kernel_buffer[1],kernel_buffer[2],kernel_buffer[3]);
break;
case GETPID:
kernel_buffer[KERNEL_RETURN] = sched_getpid();
break;
case WAITPID:
kernel_buffer[KERNEL_RETURN] = sched_waitpid(kernel_buffer[1]);
break;
case PTICKS:
kernel_buffer[KERNEL_RETURN] = (int) storage_index();
break;
case PNAME:
p = process_getbypid(kernel_buffer[1]);
if(p == NULL)
{
kernel_buffer[KERNEL_RETURN] = (int) NULL;
} else {
kernel_buffer[KERNEL_RETURN] = (int) p->name;
}
break;
case PSTATUS:
p = process_getbypid(kernel_buffer[1]);
if(p == NULL)
{
kernel_buffer[KERNEL_RETURN] = (int) -1;
} else {
kernel_buffer[KERNEL_RETURN] = (int) p->state;
}
break;
case PPRIORITY:
p = process_getbypid(kernel_buffer[1]);
if(p == NULL)
{
kernel_buffer[KERNEL_RETURN] = (int) -1;
} else {
kernel_buffer[KERNEL_RETURN] = (int) p->priority;
}
break;
case PGID:
p = process_getbypid(kernel_buffer[1]);
if(p == NULL)
{
kernel_buffer[KERNEL_RETURN] = (int) -1;
} else {
kernel_buffer[KERNEL_RETURN] = (int) p->gid;
}
break;
case PGETPID_AT:
p = process_getbypindex(kernel_buffer[1]);
if (p->state != -1) {
kernel_buffer[KERNEL_RETURN] = (int) p->pid;
} else {
kernel_buffer[KERNEL_RETURN] = -1;
}
break;
case KILL:
kernel_buffer[KERNEL_RETURN - 1] = kernel_buffer[1];
kernel_buffer[KERNEL_RETURN - 2] = kernel_buffer[2];
break;
case PSETP:
p = process_getbypid(kernel_buffer[1]);
if(p == NULL) {
kernel_buffer[KERNEL_RETURN] = (int) -1;
} else {
if(kernel_buffer[2] <= 4 && kernel_buffer[2] >= 0) {
p->priority = kernel_buffer[2];
}
kernel_buffer[KERNEL_RETURN] = (int) p->gid;
}
break;
case SETSCHED:
sched_set_mode(kernel_buffer[1]);
break;
case PWD:
kernel_buffer[KERNEL_RETURN] = (int) fs_pwd();
break;
case CD:
kernel_buffer[KERNEL_RETURN] = (int) fs_cd(kernel_buffer[1]);
break;
case FINFO:
fs_finfo(kernel_buffer[1], kernel_buffer[2]);
break;
case MOUNT:
fs_init();
break;
case MKDIR:
kernel_buffer[KERNEL_RETURN] = (int) fs_mkdir(kernel_buffer[1],current_ttyc()->pwd);
break;
case RM:
inode = fs_indir(kernel_buffer[1],current_ttyc()->pwd);
if (inode) {
kernel_buffer[KERNEL_RETURN] = (int) fs_rm(inode,0);
} else {
kernel_buffer[KERNEL_RETURN] = ERR_NO_EXIST;
}
break;
case GETUID:
if(kernel_buffer[1] == 0)
{
kernel_buffer[KERNEL_RETURN] = (int) current_ttyc()->uid;
} else {
kernel_buffer[KERNEL_RETURN] = (int) user_exists(kernel_buffer[1]);
}
break;
case GETGID:
if(kernel_buffer[1] == 0)
{
kernel_buffer[KERNEL_RETURN] = (int) user_gid(current_ttyc()->uid);
} else {
kernel_buffer[KERNEL_RETURN] = (int) user_gid(kernel_buffer[1]);
}
break;
case MAKEUSER:
kernel_buffer[KERNEL_RETURN] = user_create(kernel_buffer[1],
kernel_buffer[2], user_gid(current_ttyc()->uid));
break;
case SETGID:
kernel_buffer[KERNEL_RETURN] = user_setgid(kernel_buffer[1],
kernel_buffer[2]);
break;
case UDELETE:
kernel_buffer[KERNEL_RETURN] = user_delete(kernel_buffer[1]);
break;
case UEXISTS:
kernel_buffer[KERNEL_RETURN] = user_exists(kernel_buffer[1]);
break;
case ULOGIN:
kernel_buffer[KERNEL_RETURN] = user_login(kernel_buffer[1],
kernel_buffer[2]);
break;
case ULOGOUT:
kernel_buffer[KERNEL_RETURN] = user_logout();
break;
case CHOWN:
kernel_buffer[KERNEL_RETURN] = fs_chown(kernel_buffer[1],
kernel_buffer[2]);
break;
case CHMOD:
kernel_buffer[KERNEL_RETURN] = fs_chmod(kernel_buffer[1],
kernel_buffer[2]);
break;
case GETOWN:
kernel_buffer[KERNEL_RETURN] = fs_getown(kernel_buffer[1]);
break;
case GETMOD:
kernel_buffer[KERNEL_RETURN] = fs_getmod(kernel_buffer[1]);
break;
case CP:
kernel_buffer[KERNEL_RETURN] = fs_cp(kernel_buffer[1], kernel_buffer[2], current_ttyc()->pwd, current_ttyc()->pwd);
break;
case MV:
kernel_buffer[KERNEL_RETURN] = fs_mv(kernel_buffer[1], kernel_buffer[2], current_ttyc()->pwd);
break;
case LINK:
kernel_buffer[KERNEL_RETURN] = fs_open_link(kernel_buffer[1], kernel_buffer[2], current_ttyc()->pwd);
break;
case FSSTAT:
kernel_buffer[KERNEL_RETURN] = fs_stat(kernel_buffer[1]);
break;
case SLEEP:
kernel_buffer[KERNEL_RETURN] = scheduler_sleep(kernel_buffer[1]);
break;
default:
break;
}
krn--;
}
void init() {
signal(SIGUSR1, &signal1);
printf("[Init][Pid: %d] Scheduler Testing Program\n", sched_getpid());
sched_nice(-20);
for (int i = 0; i < 15; i++) {
if (sched_fork() == 0) {
printf("[Child][Pid: %d] Parent Pid: %d\n", sched_getpid(), sched_getppid());
sched_nice(-19 + i);
struct timespec start, stop;
clock_gettime(CLOCK_REALTIME, &start);
for (long int j = 0; j < 1000000000; j++);
clock_gettime(CLOCK_REALTIME, &stop);
printf("[Child][Pid: %d] Execution Complete. Took %ld Seconds.\n", sched_getpid(), (long int)(stop.tv_sec - start.tv_sec));
sched_exit(i);
printf("[Child][Pid: %d] This Will Never Get Executed\n", sched_getpid());
}
}
printf("[Init][Pid: %d] Process Information\n", sched_getpid());
sched_ps();
for (int i = 0; i < 15; i++) {
int returncode;
int cc = sched_wait(&returncode);
printf("[Init][Pid: %d] Child Returned [%d] With Exit Code [%d]\n", sched_getpid(), cc, returncode);
}
int returncode;
int cc = sched_wait(&returncode);
printf("[Init][Pid: %d] Calling Wait With No Children Returns [%d]\n", sched_getpid(), cc);
sched_sleep(&wait1);
for (int i = 0; i < 15; i++) {
if (sched_fork() == 0) {
printf("[Child][Pid: %d] Parent Pid: %d\n", sched_getpid(), sched_getppid());
sched_nice(-19 + i);
if (i % 2 == 1)
sched_sleep(&wait1);
else
sched_sleep(&wait2);
printf("[Child][Pid: %d] Execution Complete.\n", sched_getpid());
sched_exit(i);
}
}
for (int i = 0; i < 1000000000; i++);
printf("[Init][Pid: %d] Process Information\n", sched_getpid());
sched_ps();
printf("Wakeup 2\n");
sched_wakeup(&wait2);
printf("Wakeup 1\n");
sched_wakeup(&wait1);
for (int i = 0; i < 15; i++) {
int returncode;
int cc = sched_wait(&returncode);
printf("[Init][Pid: %d] Child Returned [%d] With Exit Code [%d]\n", sched_getpid(), cc, returncode);
}
printf("[Init][Pid: %d] Exiting Testing Program. Passing Control Back To Idle\n", sched_getpid());
sched_exit(0);
}