void AtaTaskInit (void)
{
KPRINTF ("AtaTaskInit()");
ata_pid = GetPID();
if ((ata_buffer = KMalloc (ATA_BUFFER_SZ)) != NULL)
{
if ((ata_timer_signal = AllocSignal()) != -1)
{
if ((ata_alarm_signal = AllocSignal()) != -1)
{
if ((ata_msgport = CreateMsgPort()) != NULL)
{
if (AtaInitUnits() == 0)
{
ata_init_error = 0;
KSignal (GetPPID(), SIG_INIT);
return;
}
DeleteMsgPort (ata_msgport);
}
FreeSignal (ata_alarm_signal);
}
FreeSignal (ata_timer_signal);
}
KFree (ata_buffer);
}
ata_init_error = -1;
KSignal (GetPPID(), SIG_INIT);
Exit(-1);
}
/*
* If SIGUSR1 was set to SIG_IGN when the server started, assume that either
*
* a- The parent process is ignoring SIGUSR1
*
* or
*
* b- The parent process is expecting a SIGUSR1
* when the server is ready to accept connections
*
* In the first case, the signal will be harmless, in the second case,
* the signal will be quite useful.
*/
static void
InitParentProcess(void)
{
#if !defined(WIN32)
OsSigHandlerPtr handler;
handler = OsSignal (SIGUSR1, SIG_IGN);
if ( handler == SIG_IGN)
RunFromSmartParent = TRUE;
OsSignal(SIGUSR1, handler);
ParentProcess = getppid ();
#ifdef __UNIXOS2__
/*
* fg030505: under OS/2, xinit is not the parent process but
* the "grant parent" process of the server because execvpe()
* presents us an additional process number;
* GetPPID(pid) is part of libemxfix
*/
ParentProcess = GetPPID (ParentProcess);
#endif /* __UNIXOS2__ */
#endif
}
int
main()
{
int x, y=6;
PrintString("Parent PID: ");
PrintInt(GetPID());
PrintChar('\n');
x = Fork();
if (x == 0) {
PrintString("Child PID: ");
PrintInt(GetPID());
PrintChar('\n');
PrintString("Child's parent PID: ");
PrintInt(GetPPID());
PrintChar('\n');
PrintString("Child calling sleep at time: ");
PrintInt(GetTime());
PrintChar('\n');
Sleep(100);
PrintString("Child returned from sleep at time: ");
PrintInt(GetTime());
PrintChar('\n');
y++;
PrintString("Child y=");
PrintInt(y);
PrintChar('\n');
x = Fork();
//Exec("../test/printtest");
if (x == 0) {
PrintString("Child PID: ");
PrintInt(GetPID());
PrintChar('\n');
y++;
PrintString("Child2 y=");
PrintInt(y);
PrintChar('\n');
Exit(20);
}
else {
PrintString("Parent after fork waiting for child: ");
PrintInt(x);
PrintChar('\n');
PrintString("Parent2 join value: ");
PrintInt(Join(x));
PrintChar('\n');
PrintString("Parent2 y=");
PrintInt(y);
PrintChar('\n');
Exit(10);
}
}
else {
PrintString("Parent after fork waiting for child: ");
PrintInt(x);
PrintChar('\n');
PrintString("Parent2 join value: ");
PrintInt(Join(x));
PrintChar('\n');
PrintString("Parent y=");
PrintInt(y);
PrintChar('\n');
Exit(1);
}
return 0;
}
