int waitpid(int pid)
{
if(current->proc->flags & PROC_FLAG_DEBUG)
{
debug("[info]WAITPID(%d)\n", pid);
}
process_t *proc = get_process(pid);
while(proc->state != PROC_STATE_FINISHED)
{
scheduler_sleep(current, &proc->waiting);
schedule();
}
int ret = proc->exit_code;
free_process(proc);
errno = 0;
return ret;
}
// 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--;
}
/**
* Blocks the process a certain amount of time.
*
* @param seconds, the quantity of seconds to be blocked.
*/
void _sleep(int seconds) {
scheduler_sleep(scheduler_current(), seconds);
}
