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Kernel sends SIGKSTOP just before shutdown. Drivers do clean up and exit.

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This commit is contained in:
Jorrit Herder
2005-07-20 15:28:05 +00:00
parent f1153541c7
commit d2d975246d
4 changed files with 38 additions and 37 deletions
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drivers/tty/tty.c
+12 -25
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@@ -19,7 +19,7 @@
* The valid messages and their parameters are:
*
* HARD_INT: output has been completed or input has arrived
* HARD_STOP: MINIX wants to shutdown; run code to cleanly stop
* SYS_EVENT: e.g., MINIX wants to shutdown; run code to cleanly stop
* DEV_READ: a process wants to read from a terminal
* DEV_WRITE: a process wants to write on a terminal
* DEV_IOCTL: a process wants to change a terminal's parameters
@@ -33,7 +33,7 @@
* ---------------------------------------------------------------------------
* | HARD_INT | | | | | | |
* |-------------+---------+---------+---------+---------+---------+---------|
* | HARD_STOP | | | | | | |
* | SYS_EVENT | sig set | | | | | |
* |-------------+---------+---------+---------+---------+---------+---------|
* | DEV_READ |minor dev| proc nr | count | O_NONBLOCK| buf ptr |
* |-------------+---------+---------+---------+---------+---------+---------|
@@ -206,31 +206,18 @@ PUBLIC void main(void)
}
case SYS_EVENT: { /* new kernel message is available */
sigset_t sigset = (sigset_t) tty_mess.NOTIFY_ARG;
if (sigismember(&sigset, SIGKMESS)) {
do_new_kmess(&tty_mess);
} else if (sigismember(&sigset, SIGTERM)) {
cons_stop(); /* first switch to primary console */
} else if (sigismember(&sigset, SIGKSTOP)) {
if (sigismember(&sigset, SIGKSTOP)) {
cons_stop(); /* switch to primary console */
do_panic_dumps(&tty_mess);
}
continue;
}
case HARD_STOP: { /* MINIX is going down */
static int stop = 0; /* expect two HARD_STOP messages */
if (! stop++) {
cons_stop(); /* first switch to primary console */
} else {
if(irq_hook_id != -1) {
int r;
r = sys_irqdisable(&irq_hook_id);
r = sys_irqrmpolicy(KEYBOARD_IRQ, &irq_hook_id);
#if DEAD_CODE
if (irq_hook_id != -1) {
sys_irqdisable(&irq_hook_id);
sys_irqrmpolicy(KEYBOARD_IRQ, &irq_hook_id);
}
printf("[DONE]\n");
printf("MINIX will now be shutdown.\n");
sys_exit(0); /* then exit TTY */
}
continue;
#endif
}
if (sigismember(&sigset, SIGTERM)) cons_stop();
if (sigismember(&sigset, SIGKMESS)) do_new_kmess(&tty_mess);
continue;
}
case PANIC_DUMPS: /* allow panic dumps */
cons_stop(); /* switch to primary console */