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Minor fixes for RS. Install signal handlers.

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This commit is contained in:
Jorrit Herder
2005-10-12 15:06:00 +00:00
parent 2eca6f9374
commit ee1f2bcb39
4 changed files with 48 additions and 35 deletions
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53
drivers/printer/printer.c
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@@ -109,22 +109,8 @@ FORWARD _PROTOTYPE( void prepare_output, (void) );
FORWARD _PROTOTYPE( void do_initialize, (void) );
FORWARD _PROTOTYPE( void reply, (int code,int replyee,int proc,int status));
FORWARD _PROTOTYPE( void do_printer_output, (void) );
FORWARD _PROTOTYPE( void signal_handler, (int sig) );
FORWARD _PROTOTYPE( void do_signal, (message *m_ptr) );
/*===========================================================================*
* signal_handler *
*===========================================================================*/
PRIVATE void signal_handler(sig)
int sig; /* signal number */
{
/* Expect a SIGTERM signal when this server must shutdown. */
if (sig == SIGTERM) {
printf("Shutting down PRINTER driver\n");
exit(0);
} else {
printf("PRINTER got unknown signal\n");
}
}
/*===========================================================================*
* printer_task *
@@ -133,6 +119,14 @@ PUBLIC void main(void)
{
/* Main routine of the printer task. */
message pr_mess; /* buffer for all incoming messages */
struct sigaction sa;
int s;
/* Install signal handlers. Ask PM to transform signal into message. */
sa.sa_handler = SIG_MESS;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGTERM,&sa,NULL)<0) panic("PRN","sigaction failed", errno);
while (TRUE) {
receive(ANY, &pr_mess);
@@ -147,14 +141,31 @@ PUBLIC void main(void)
case DEV_STATUS: do_status(&pr_mess); break;
case CANCEL: do_cancel(&pr_mess); break;
case HARD_INT: do_printer_output(); break;
case SYS_SIG: /* do nothing */ break;
case DEV_PING: notify(pr_mess.m_source); break;
case SYS_SIG: do_signal(&pr_mess); break;
case DEV_PING: notify(pr_mess.m_source); break;
default:
reply(TASK_REPLY, pr_mess.m_source, pr_mess.PROC_NR, EINVAL);
}
}
}
/*===========================================================================*
* do_signal *
*===========================================================================*/
PRIVATE void do_signal(m_ptr)
message *m_ptr; /* signal message */
{
int sig;
sigset_t sigset = m_ptr->NOTIFY_ARG;
/* Expect a SIGTERM signal when this server must shutdown. */
if (sigismember(&sigset, SIGTERM)) {
exit(0);
}
/* Ignore all other signals. */
}
/*===========================================================================*
* do_write *
*===========================================================================*/
@@ -204,7 +215,7 @@ register message *m_ptr; /* pointer to the newly arrived message */
}
/*===========================================================================*
* output_done *
* output_done *
*===========================================================================*/
PRIVATE void output_done()
{
@@ -237,14 +248,9 @@ PRIVATE void output_done()
else { /* done! report back to FS */
status = orig_count;
}
#if DEAD_CODE
reply(REVIVE, caller, proc_nr, status);
writing = FALSE;
#else
revive_pending = TRUE;
revive_status = status;
notify(caller);
#endif
}
/*===========================================================================*
@@ -311,7 +317,6 @@ int status; /* number of chars printed or error code */
PRIVATE void do_initialize()
{
/* Set global variables and initialize the printer. */
static int initialized = FALSE;
if (initialized) return;
initialized = TRUE;