/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main()
{
/* Main routine of the process manager. */
int result, s, proc_nr;
struct mproc *rmp;
sigset_t sigset;
pm_init(); /* initialize process manager tables */
/* This is PM's main loop- get work and do it, forever and forever. */
while (TRUE) {
get_work(); /* wait for an PM system call */
/* Check for system notifications first. Special cases. */
if (call_nr == SYN_ALARM) {
pm_expire_timers(m_in.NOTIFY_TIMESTAMP);
result = SUSPEND; /* don't reply */
} else if (call_nr == SYS_SIG) { /* signals pending */
sigset = m_in.NOTIFY_ARG;
if (sigismember(&sigset, SIGKSIG)) (void) ksig_pending();
result = SUSPEND; /* don't reply */
}
/* Else, if the system call number is valid, perform the call. */
else if ((unsigned) call_nr >= NCALLS) {
result = ENOSYS;
} else {
result = (*call_vec[call_nr])();
}
/* Send the results back to the user to indicate completion. */
if (result != SUSPEND) setreply(who, result);
swap_in(); /* maybe a process can be swapped in? */
/* Send out all pending reply messages, including the answer to
* the call just made above. The processes must not be swapped out.
*/
for (proc_nr=0, rmp=mproc; proc_nr < NR_PROCS; proc_nr++, rmp++) {
/* In the meantime, the process may have been killed by a
* signal (e.g. if a lethal pending signal was unblocked)
* without the PM realizing it. If the slot is no longer in
* use or just a zombie, don't try to reply.
*/
if ((rmp->mp_flags & (REPLY | ONSWAP | IN_USE | ZOMBIE)) ==
(REPLY | IN_USE)) {
if ((s=send(proc_nr, &rmp->mp_reply)) != OK) {
panic(__FILE__,"PM can't reply to", proc_nr);
}
rmp->mp_flags &= ~REPLY;
}
}
}
return(OK);
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main()
{
/* Main routine of the process manager. */
int result, s, proc_nr;
struct mproc *rmp;
sigset_t sigset;
pm_init(); /* initialize process manager tables */
/* This is PM's main loop- get work and do it, forever and forever. */
while (TRUE) {
get_work(); /* wait for an PM system call */
/* Check for system notifications first. Special cases. */
switch(call_nr)
{
case SYN_ALARM:
pm_expire_timers(m_in.NOTIFY_TIMESTAMP);
result = SUSPEND; /* don't reply */
break;
case SYS_SIG: /* signals pending */
sigset = m_in.NOTIFY_ARG;
if (sigismember(&sigset, SIGKSIG)) {
(void) ksig_pending();
}
result = SUSPEND; /* don't reply */
break;
case PM_GET_WORK:
if (who_e == FS_PROC_NR)
{
send_work();
result= SUSPEND; /* don't reply */
}
else
result= ENOSYS;
break;
case PM_EXIT_REPLY:
case PM_REBOOT_REPLY:
case PM_EXEC_REPLY:
case PM_CORE_REPLY:
case PM_EXIT_REPLY_TR:
if (who_e == FS_PROC_NR)
{
handle_fs_reply(&m_in);
result= SUSPEND; /* don't reply */
}
else
result= ENOSYS;
break;
case ALLOCMEM:
result= do_allocmem();
break;
case FORK_NB:
result= do_fork_nb();
break;
case EXEC_NEWMEM:
result= exec_newmem();
break;
case EXEC_RESTART:
result= do_execrestart();
break;
case PROCSTAT:
result= do_procstat();
break;
case GETPROCNR:
result= do_getprocnr();
break;
case GETPUID:
result= do_getpuid();
break;
case DIAG_REPL :
diag_repl();
result= SUSPEND;
break;
default:
/* Else, if the system call number is valid, perform the
* call.
*/
if ((unsigned) call_nr >= NCALLS) {
result = ENOSYS;
} else {
#if ENABLE_SYSCALL_STATS
calls_stats[call_nr]++;
#endif
result = (*call_vec[call_nr])();
}
break;
}
/* Send the results back to the user to indicate completion. */
if (result != SUSPEND) setreply(who_p, result);
/* Send out all pending reply messages, including the answer to
* the call just made above.
*/
for (proc_nr=0, rmp=mproc; proc_nr < NR_PROCS; proc_nr++, rmp++) {
/* In the meantime, the process may have been killed by a
* signal (e.g. if a lethal pending signal was unblocked)
* without the PM realizing it. If the slot is no longer in
* use or just a zombie, don't try to reply.
*/
if ((rmp->mp_flags & (REPLY | IN_USE | ZOMBIE)) ==
(REPLY | IN_USE)) {
s=sendnb(rmp->mp_endpoint, &rmp->mp_reply);
if (s != OK) {
printf("PM can't reply to %d (%s): %d\n",
rmp->mp_endpoint, rmp->mp_name, s);
}
rmp->mp_flags &= ~REPLY;
}
}
}
return(OK);
}
